ut Dysregulation of Exosome Cargo by Mutant Tau Expressed in Human-Induced Pluripotent Stem Cell (iPSC) Neurons Revealed by Proteomics Analyses [Research] By feedproxy.google.com Published On :: 2020-04-15T09:35:42-07:00 Accumulation and propagation of hyperphosphorylated tau (p-tau) is a common neuropathological hallmark associated with neurodegeneration of Alzheimer's disease (AD), frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17), and related tauopathies. Extracellular vesicles, specifically exosomes, have recently been demonstrated to participate in mediating tau propagation in brain. Exosomes produced by human induced pluripotent stem cell (iPSC)-derived neurons expressing mutant Tau (mTau), containing the P301L and V337M Tau mutations of FTDP-17, possess the ability to propagate p-tau pathology after injection into mouse brain. To gain an understanding of the mTau exosome cargo involved in tau pathogenesis, these pathogenic exosomes were analyzed by proteomics and bioinformatics. The data showed that mTau expression dysregulates the exosome proteome to result in (1) proteins uniquely present only in mTau, and not control exosomes, (2) the absence of proteins in mTau exosomes, uniquely present in control exosomes, and (3) shared proteins which were significantly up-regulated or down-regulated in mTau compared to control exosomes. Notably, mTau exosomes (not control exosomes) contain ANP32A (also known as I1PP2A), an endogenous inhibitor of the PP2A phosphatase which regulates the phosphorylation state of p-tau. Several of the mTau exosome-specific proteins have been shown to participate in AD mechanisms involving lysosomes, inflammation, secretases, and related processes. Furthermore, the mTau exosomes lacked a substantial portion of proteins present in control exosomes involved in pathways of localization, vesicle transport, and protein binding functions. The shared proteins present in both mTau and control exosomes represented exosome functions of vesicle-mediated transport, exocytosis, and secretion processes. These data illustrate mTau as a dynamic regulator of the biogenesis of exosomes to result in acquisition, deletion, and up- or down-regulation of protein cargo to result in pathogenic mTau exosomes capable of in vivo propagation of p-tau neuropathology in mouse brain. Full Article
ut Acquiring and Analyzing Data Independent Acquisition Proteomics Experiments without Spectrum Libraries [Perspective] By feedproxy.google.com Published On :: 2020-04-20T11:35:14-07:00 Data independent acquisition (DIA) is an attractive alternative to standard shotgun proteomics methods for quantitative experiments. However, most DIA methods require collecting exhaustive, sample-specific spectrum libraries with data dependent acquisition (DDA) to detect and quantify peptides. In addition to working with non-human samples, studies of splice junctions, sequence variants, or simply working with small sample yields can make developing DDA-based spectrum libraries impractical. Here we illustrate how to acquire, queue, and validate DIA data without spectrum libraries, and provide a workflow to efficiently generate DIA-only chromatogram libraries using gas-phase fractionation (GPF). We present best-practice methods for collecting DIA data using Orbitrap-based instruments, and develop an understanding for why DIA using an Orbitrap mass spectrometer should be approached differently than when using time-of-flight instruments. Finally, we discuss several methods for analyzing DIA data without libraries. Full Article
ut Iraq Tribunal: US Pulling Out By feedproxy.google.com Published On :: Tue, 07 Apr 2020 10:21:57 +0000 1 May 2008 , Number 3 Rowdy sessions of the Iraq High Tribunal attracted sensational daily news coverage while Saddam Hussein was being tried. However, following his grim execution in December 2006, coverage all but evaporated. The foreign press and most western monitors packed their bags and left, and television reporting in Iraq dwindled. Now even the United States Department of Justice, which initially provided key financial and political support, is quietly withdrawing its advisers. So what is happening at the Tribunal and why are the Americans pulling out? Sonya Sceats Associate Fellow, International Law Programme @SonyaSceats SaddamPA.jpeg Full Article
ut Lebanon: Futile Victory By feedproxy.google.com Published On :: Tue, 07 Apr 2020 15:11:46 +0000 1 June 2008 , Number 3 For the third time in less than two years, Beirut has been turned into a battleground, with Hizbollah and the opposition taking over the city. The government and its allies did not engage militarily, managing to avoid civil war and becoming a regional battlefield. The Arab League is now trying to sort things out, highlighting the regional and international dimensions. Nadim Shehadi Associate Fellow, Middle East and North Africa Programme @Confusezeus APLeb2.jpg Full Article
ut Towards a Low-Carbon Future: China and the European Union By feedproxy.google.com Published On :: Mon, 04 May 2020 09:08:16 +0000 1 October 2007 , Number 7 Chinese goods seem to flood western markets: computers, light bulbs, sweaters, T-shirts and bras. The instinct is to try to protect home producers. A better plan would be to work with Beijing on producing products for the next industrial revolution – the creation of a low-carbon economy. But that would take real vision and political courage. Bernice Lee OBE Research Director; Executive Director, Hoffmann Centre for Sustainable Resource Economy @BerniceWLee Nick Mabey Founding director and Chief Executive, E3G GettyImages-102943828.jpg Full Article
ut Accountability, denial and the future-proofing of British torture By feedproxy.google.com Published On :: Thu, 07 May 2020 09:24:20 +0000 7 May 2020 , Volume 96, Number 3 Read online Ruth Blakeley and Sam Raphael When powerful liberal democratic states are found to be complicit in extreme violations of human rights, how do they respond and why do they respond as they do? Drawing on the example of the United Kingdom's complicity in torture since 9/11, this article demonstrates how reluctant the UK has been to permit a full reckoning with its torturous past. We demonstrate that successive UK governments engaged in various forms of denial, obfuscation and attempts to obstruct investigation and avoid accountability. The net effect of their responses has been to deny the victims redress, through adequate judicial processes, and to deny the public adequate state accountability. These responses are not simply aimed at shielding from prosecution the perpetrators and those who have oversight of them, nor preventing political embarrassment. The various forms of denial and obstruction are also designed to ensure that collusion can continue uninterrupted. A core concern of intelligence officials and ministers has been to prevent any process that would lead to a comprehensive prohibition on involvement in operations where torture and cruel, inhuman and degrading treatment are a real possibility. The door remains wide open, and deliberately so, for British involvement in torture. Full Article
ut Rethinking youth bulge theory in policy and scholarship: incorporating critical gender analysis By feedproxy.google.com Published On :: Thu, 07 May 2020 09:26:03 +0000 7 May 2020 , Volume 96, Number 3 Lesley Pruitt Read online For decades ‘youth bulge’ theory has dominated understandings of youth in mainstream International Relations. Youth bulge theory has also become part of some public media analyses, mainstream political rhetoric, and even officially enshrined in the foreign policy of some states. Through the ‘youth bulge’ lens, youth—especially males—have been presented as current or future perpetrators of violence. However, this article argues that the youth bulge thesis postulated in mainstream IR is based on flawed theoretical assumptions. In particular, supporters of youth bulge theory fail to engage with existing research by feminist IR scholars and thus take on a biological essentialist approach. This has led to theoretical and practical misunderstandings of the roles youth play in relation to conflict, peace and security. These partial and biased understandings have also resulted in less effective policy-making. In critically reflecting on the ‘youth bulge’ thesis, this article argues that applying gender analysis is crucial to understanding the involvement of young people in general—and young men in particular—in conflict. Doing so will contribute to advancing more accurate analysis in scholarship and policy-making. Full Article
ut Let's talk about the interregnum: Gramsci and the crisis of the liberal world order By feedproxy.google.com Published On :: Thu, 07 May 2020 09:34:15 +0000 7 May 2020 , Volume 96, Number 3 Read online Milan Babic The liberal international order (LIO) is in crisis. Numerous publications, debates and events have time and again made it clear that we are in the midst of a grand transformation of world order. While most contributions focus on either what is slowly dying (the LIO) or what might come next (China, multipolarity, chaos?), there is less analytical engagement with what lies in between those two phases of world order. Under the assumption that this period could last years or even decades, a set of analytical tools to understand this interregnum is urgently needed. This article proposes an analytical framework that builds on Gramscian concepts of crisis that will help us understand the current crisis of the LIO in a more systematic way. It addresses a gap in the literature on changing world order by elaborating three Gramsci-inspired crisis characteristics—processuality, organicity and morbidity—that sketch the current crisis landscape in a systematic way. Building on this framework, the article suggests different empirical entry points to the study of the crisis of the LIO and calls for a research agenda that takes this crisis seriously as a distinct period of changing world orders. Full Article
ut Zelenskyy Finds That There Are No Easy Solutions in Donbas By feedproxy.google.com Published On :: Wed, 23 Oct 2019 14:46:36 +0000 23 October 2019 Duncan Allan Associate Fellow, Russia and Eurasia Programme Leo Litra Senior Research Fellow, New Europe Center The president has attempted to use the so-called Steinmeier Formula to find a compromise on holding elections in the east of Ukraine. But he has run into a stark reality: Moscow and Kyiv’s interests remain irreconcilable. 2019-10-23-Ukraine.jpg A banner reading 'No capitulation!' is unfurled above the entrance to the city hall in Kyiv as part of protests against implementation of the so-called Steinmeier Formula. Photo: Getty Images. In 2016, the then-German foreign minister, Frank-Walter Steinmeier, suggested a way around the impasse in east Ukraine.He proposed that elections in the areas held by Russian-backed insurgents – the ‘Donetsk People’s Republic’ (DNR) and the ‘Luhansk People’s Republic’ (LNR) – could be held under Ukrainian legislation, with Kyiv adopting a temporary law on ‘special status’, the main disagreement between Russia and Ukraine in the Minsk Agreements. This law would become permanent once the Organization for Security and Cooperation in Europe (OSCE) had declared that elections correspond with OSCE standards.The reaction in Ukraine was strongly negative. The so-called Steinmeier Formula contradicted Kyiv’s position that elections in the occupied Donbas should only go ahead in a secure environment – requiring the prior withdrawal of Russian forces and the return of the eastern border to Ukraine’s control. It also did not address the differing views of ‘special status’; Russia demands a much greater devolution of constitutional powers to the DNR and LNR regimes than Ukraine will grant.But on 1 October, Volodymyr Zelenskyy, the new Ukrainian president, announced that he was signing up to the Steinmeier Formula. He also announced a conditional withdrawal of Ukrainian forces from two frontline areas in the east.Quick reversalDuring the 2019 presidential election campaign, Zelenskyy repeatedly promised that, if elected, he would re-energize efforts to end the war. This appealed to many Ukrainians, who understandably want the conflict over, although Zelenskyy’s eventual electoral victory was largely won on domestic issues.But his initiative quickly ran into two problems.First, following a major prisoner swap in September, Russian President Vladimir Putin appeared to judge that Zelenskyy was in a hurry to deliver his election promises and was acting without consulting France and Germany. Russia had earlier demanded that Ukraine formally agree to elections in the Donbas as the precondition for a summit of the ‘Normandy’ powers (the diplomatic format comprising leaders of Ukraine, Russia, Germany and France, which has not met since 2016).Moreover, the US, which is not part of the ‘Normandy’ group, has seemed disengaged because of domestic controversies. Concluding that Zelenskyy was vulnerable, the Kremlin welcomed his announcement about the Steinmeier Formula but declined to assent to a summit, hoping to extract further concessions.Second, Zelenskyy’s action triggered protests in Kyiv and other Ukrainian cities. Critics feared that he intended to make unilateral concessions over ‘special status’. Though he tried to assure Ukrainians that ‘there won't be any elections there if the [Russian] troops are still there’, concerns were fuelled by what many saw as his lack of openness about what the Steinmeier Formula really meant. Ukrainian public opinion wants an end to the war, but apparently not at any price.Zelenskyy duly rowed back. During a marathon 14-hour press conference on 10 October, he emphasized that he would not surrender Ukraine’s vital interests. He also acknowledged that he had been insufficiently open with the Ukrainian public. For the time being at least, he seems to have been given pause.A situation resistant to compromiseInstead, Zelenskyy may now attempt to ‘freeze’ the conflict by ending active operations. This is not Ukraine’s favoured outcome but could be the most realistic one in current conditions. Russia still calculates that time is on its side. It believes that Western support for Ukraine is lukewarm and that Kyiv will eventually have to give it what it wants. Russia clearly felt no pressure to respond positively to Zelenskyy’s overture, which it probably read as a weakness to be exploited. For these reasons, Zelenskyy now appears less optimistic that rapid progress to end the war is possible. A new summit of the ‘Normandy’ powers may happen but looks unlikely in the near future. This may act as an incentive for further bilateral negotiations between Ukraine and Russia, such as those which delivered the prisoner swap. However, a diplomatic process managed by Zelenskyy and Putin alone risks reducing Ukraine’s leverage. Finally, the main obstacles to implementation of the Minsk Agreements – radically different views of elections in, and ‘special status’ for, the DNR and LNR – remain. The Kremlin’s versions of both would gravely limit Ukraine’s sovereignty; Kyiv’s would facilitate the re-establishment of its control over the east. It is hard to see how this gap can be bridged.Tellingly, the Steinmeier Formula offers no answer to this conundrum. Some conflicts, it seems, are resistant to diplomatic compromises that aim to satisfy everyone equally. Full Article
ut Kazakhstan: Reaching Out to Central Asian Neighbours By feedproxy.google.com Published On :: Wed, 04 Dec 2019 10:21:03 +0000 4 December 2019 Annette Bohr Associate Fellow, Russia and Eurasia Programme Despite its regional outreach, Kazakhstan’s diplomatic priority will remain Russia, China, and Europe. 2019-12-04-Kaz.jpg Kazakhstan's President Kassym-Jomart Tokayev, Kazakh Majilis Chairman Nurlan Nigmatulin and ex-president Nursultan Nazarbayev at an inauguration ceremony in parliament. Photo: Pavel AleksandrovTASS via Getty Images. Leaders of the resource-rich Central Asian region have the propensity to remain in power until mortality dictates otherwise. Much like the UK and Brexit, however, few wanted to see Central Asia’s longest reigning ruler, Kazakhstan’s septuagenarian president Nursultan Nazarbayev, crash out without a deal.The sudden departure of the country’s official leader of the nation with no clear succession plan could have led to investment chaos, intra-elite fighting and the unravelling in a matter of months of a system he had built over decades, à la Uzbekistan following the death of long-serving autocrat Islam Karimov in 2016.In order to avoid just such a ‘no-deal’ scenario and ensure the continuity of his policies, in March Nazarbayev carefully choreographed his own resignation and the election of a hand-picked successor, President Kassym-Jomart Tokayev, while retaining plum positions and powers for himself.Tokayev’s assumption of the presidency was accompanied by protesters in the streets, increasing wealth inequality, rising Sinophobia among rank-and-file Kazakhstanis, a hard-to-kick economic dependence on oil revenues and a lack of clarity as to which leader—the old or the new president—would actually be calling the shots. But, amidst this plethora of concerns, as argued in a recent Chatham House report, Kazakhstan: Tested by Transition, one bright spot has been the tangible growth of intra-Central Asian cooperation, with the Nazarbayev-Tokayev ruling duo appearing eager to improve the regional dialogue.Kazakhstan has long shaped its identity as a Eurasian state that has acted as more of an intermediary between Russia and Central Asia than as an integral part of the Central Asian region. But since 2017, in particular, Kazakhstan has been increasingly looking for opportunities to boost hitherto weak cooperation with its Central Asian neighbours. While this is first and foremost owing to the liberalization of Uzbekistan’s large market, there are other factors at work that get less airplay.One such factor is a perceptible disentangling from the Kremlin’s policy directions as Kazakhstan has come to view Russia’s foreign policy as increasingly neo-colonial. The example of the Russia-led Eurasian Economic Union is in many respects more off-putting than inspiring, and Nur-Sultan does not want to be locked tightly into the union’s economic orbit. And in distancing itself slightly from Moscow in order to limit Russian leverage in its affairs, Nur-Sultan has shown itself to be more open to Central Asian regional initiatives.As part of the leadership’s plan to offset oil dependence, Kazakhstan aspires to become the transport, telecommunications and investment hub for Eurasian integration. The intense focus on connectivity and the development of logistical arteries and infrastructure could have the knock-on effect of boosting trade within the Central Asian region and reducing transit times, which are currently greater than in most other parts of the globe.In addition, demographic trends and educational shifts that favour ethnic Kazakhs, together with a growing ethno-nationalist narrative, have allowed the state’s leadership to identify more closely with Kazakhstan’s common Central Asian heritage and, by extension, a common Central Asian region—although Kazakhstan’s leadership still remains eager to demonstrate that the country is not just another ‘stan’. The coming to power of President Mirziyoyev in Uzbekistan appears to have made Kazakhstan more aware of the interconnectedness of the two countries in terms of geographical location and potential economic complementarities, as well as culture and history.Not least, there is a growing recognition among the Central Asian states themselves—including isolationist Turkmenistan to a degree—that deepening regional trade is mutually beneficial, especially given the constraints associated with Russia’s economic problems. The strengthening of Kazakhstan’s ties with Uzbekistan has slowly kick-started regional cooperation as a whole: trade turnover between the Central Asian states in 2018 grew by 35 per cent on the previous year.But both Kazakhstan and Uzbekistan are keen to stress that there is no discussion of integration or institutionalization, not least because previous attempts at integration have been overtaken by Russia, leaving Central Asia without its own coordinating body.The official consensus in Kazakhstan is that Uzbekistan’s economic reforms after years of isolation will spur ‘a healthy rivalry’ and ultimately boost Kazakhstan’s own economy, in so far as the competition for foreign investment will require both countries to work harder to improve their respective business and regulatory environments.At the unofficial level, however, some Kazakhstani analysts view Uzbekistan’s rise as potentially unprofitable, given the possible diversion of some investments and market activity from Kazakhstan to Uzbekistan. Moreover, Uzbekistan has the advantage of having undergone a clear change of executive, while it remains unclear which developments await Kazakhstan once First President Nazarbayev leaves the scene for good.It can certainly be argued that Uzbekistan does pose a potential threat in the long-term to Kazakhstan’s entrenched position as Central Asia’s economic powerhouse: Uzbekistan’s population is one-and-a-half times bigger, even if its nominal GDP is three times smaller. Uzbekistan has a bigger market and a well-developed industrial sector, and is already the regional leader in terms of security. But it is not as though the world’s interest is moving from Kazakhstan to Uzbekistan; rather, Uzbekistan is in the process of trying to catch up.Despite this relatively upbeat picture, Kazakhstan’s combined trade with the other Central Asian states accounts for less than 5 per cent of its total volume of foreign trade—a figure that cannot begin to equal its trade with Russia, China, and Europe. As a result, Kazakhstan will continue to give greater importance to positioning itself as a global player than as a regional leader.This article was originally published in The Diplomat. Full Article
ut How Putin Tries to Depoliticize Russia’s Youth By feedproxy.google.com Published On :: Tue, 07 Jan 2020 14:05:12 +0000 7 January 2020 Professor Nikolai Petrov Senior Research Fellow, Russia and Eurasia Programme, Chatham House Google Scholar Ekaterina Aleynikova Independent Analyst Vladimir Putin’s condescending remarks on Greta Thunberg’s activism say more about the Kremlin’s attitude towards Russian youth than climate change. 2020-01-07-Putin.jpg Vladimir Putin meets with representatives of the Russian Student Brigades in the Kremlin. Photo: Getty Images. Climate change debates have not taken root in Russia. Yet, while speaking at an energy forum in Moscow, Vladimir Putin chose to comment on Greta Thunberg, the prominent 16-year-old Swedish eco-activist. Adopting his usual sarcastically condescending persona, Putin expressed regret that the ‘kind’ and ‘very sincere’ girl was being used by adults for their own political interests in such a ‘cruel, emotional way’.These remarks may appear to have been intended to dismiss Thunberg’s environmental concerns. However, among the Russian public, concern about climate change is not widespread.Fridays for Future, the movement started by Thunberg, received little uptake in Russia, inspiring less than 100 people to take to the streets in September. This does not compare to the 50,000 or more people who came out to protest unfair elections and police brutality in Moscow in August. Indeed, Thunberg herself is largely perceived negatively among the Russian public.Thus, there was no need for Putin to warn his domestic audience about Thunberg’s ‘mistaken’ cause. In fact, Putin’s key message was not to aimed at the young activist or even the climate change debate. Although presented as spontaneous, his words revealed a carefully-constructed narrative. It was expressed in general terms.‘Adults must do everything not to bring teenagers and children into extreme situations,’ Putin urged, ‘when somebody uses children and teenagers in their own interests, it only deserves to be condemned.’ In fact, these statements were targeted at delegitimizing any sort of political engagement from young people.Those familiar with Kremlin propaganda would have recognized this narrative from the statements that have been made about Alexey Navalny’s supporters over the recent years, who have been portrayed as ‘naïve’ and ‘manipulated’. According to the state, young people should be apolitical, and hence any involvement they have in politics must come as a result of manipulation by ‘ill-intended’ adults.The same attitude is exploited to impose restrictions on individual freedoms, as is the case with the infamous gay propaganda law, which disguises discrimination in the language of protecting children. Portraying the youth as innately dependent legitimizes paternalistic interventions from the state, defining the norms of conduct.This narrative is part of a wider strategy employed by the Russian government to promote political apathy among the country’s youth. There have been efforts to discourage young people from participating in political protests, such as warnings of expulsion at schools and universities and threats of fines and prosecution against parents whose children attend demonstrations.A vivid illustration of these efforts is the recent conviction of Yegor Zhukov, a 21-year-old student from Moscow’s Higher School of Economics who discussed regime change on his blog. Instead of the four years in prison for extremism that the prosecutor asked for, he was sentenced to three years of probation, with a prohibition against him posting online as a condition. His sentencing sends a message, to Zhukov and to all young people interested in politics – he is free to go perhaps, but not free to speak out.It is not all ‘stick’ in the government’s approach to young people. There is also some ‘carrot’. The Kremlin has been paying close attention to the youth ever since the protests of 2011–12, which demonstrated conclusively that growing up under Putin has not prevented young people from imagining alternatives to his regime. Since then, Putin has made a habit of regular meetings with young people, and a number of initiatives have been rolled out to select and reward ‘top performers’.Through presidential grants, such as the Sirius educational programme in Sochi, the government selects and trains high-achieving students in STEM subjects. This is done under the umbrella of promoting technological innovation.Thus, there exist clear boundaries over where creative thinking is allowed: it is encouraged in technical sciences, but not in social sciences or humanities. To the ‘right’ type of talented children participating in government programmes, the ‘wrong’ image of Zhukov stands as a stark contrast.For the majority of young people, Russia’s education system does not support the development of independent, critical thinking. In 2016, Putin personally endorsed an initiative to create a single official history textbook that excludes ‘internal contradictions and double interpretations’. This demonstrates the desire of the regime to promote convergent thinking among the wider population.This strategy towards Russia’s youth reflects the fears of Putin’s regime, which sees young people as having disruptive potential. There have been false dawns for Russia’s liberal opposition before (most recently in 2012) and, while the summer’s protests were significant, it remains unclear whether the new generation really are more progressive than those who went before.Nevertheless, dissatisfaction with the status quo is apparent among Russia’s youth. They do not see Russia offering them good opportunities. Over 50% of those aged 18–24 reported that they want to emigrate, in a recent survey by Levada Center. Whether this discontent provides the impetus for political change in Russia may depend on the success of the Kremlin’s efforts to depoliticize Russia’s youth. Full Article
ut What Putin's Constitutional Shakeup Means By feedproxy.google.com Published On :: Thu, 16 Jan 2020 12:39:30 +0000 16 January 2020 Professor Nikolai Petrov Senior Research Fellow, Russia and Eurasia Programme, Chatham House Google Scholar Nikolai Petrov on the key takeaways from the Russian president's latest move. 2020-01-16-STP.jpg A live broadcast of Vladimir Putin's annual address to the Federal Assembly of the Russian Federation, seen on the Leader Tower screen in St Petersburg. Photo: Getty Images. Vladimir Putin’s proposed constitutional reforms will transform Russia’s political regime and allow him to prolong his grip on power when his fourth presidential term expires in 2024.The proposals suggest that he will not seek another term as president after 2024, but is preparing the ground for retaining power after he leaves the presidency. The changes will introduce checks and balances on his close associates and ensure the country’s judiciary, legislative and executive bodies remain passive.The State Duma, the lower house of parliament, is unlikely to rock the boat with legislative elections approaching in 2021. Former prime minister Dmitry Medvedev’s cabinet has been replaced by an acting government headed by a new prime minister, Mikhail Mishustin. The highest courts will be weakened further by Putin’s proposal to give the president the power to dismiss judges.Most of the proposed changes are vague. Notable specific proposals include the requirement that any presidential candidate must be resident in Russia for a minimum of 25 years prior to the elections, and that anyone who has held a residency permit abroad at any point in their life would not be eligible to run. This is clearly aimed at eliminating political opposition based abroad.While Putin mentioned a popular vote on the constitutional changes (which is not required by law), it is important to note that he didn’t use the term ‘referendum’, which would have mandated that the results be acted upon. Regardless, it is clear that, with no easy foreign policy and military wins in the offing, Putin will seek to boost his legitimacy through a popular vote. The current federal electoral cycle starts next year and will end in 2024 with the presidential election.The key question now is how Putin will maintain control over the siloviki, Russia’s political elite, though he has made this task easier for himself by replacing some of the strongest players with mid-level officers and weakening the authority of those who remain.The proposals to consult with the Federation Council, the upper house of parliament, when appointing siloviki and to keep the president in charge of law enforcement are a smokescreen. Putin will consolidate his power through his leadership at the Security Council and by chairing the State Council. For this reason, Putin is seeking to enshrine the State Council, which was reshaped in 2018 to include senior government ministers, in the constitution. It is too early to be certain of the major beneficiaries of these sweeping reforms, though Sergey Sobyanin, the current mayor of Moscow, is likely to become Putin’s deputy at the State Council. The head of the audit chamber, Alexei Kudrin, and Deputy Chief of Staff Sergei Kiriyenko are also likely to benefit from the changes, after helping to develop Putin’s political and economic strategies prior to the 2018 presidential election.Notably, the audit chamber, headed by Kudrin, will now have the power to check Rostekh, Rosneftegaz and Gazprom, organizations associated with major siloviki figures Sergey Chemezov and Igor Sechin. The role offered to Medvedev – deputy chair of the Security Council – will be newly created: the scope is unclear but it is unlikely that Putin will relinquish any of his influence over the siloviki. Full Article
ut Three Challenges for UK Peacebuilding Policy in the South Caucasus After Brexit By feedproxy.google.com Published On :: Tue, 21 Jan 2020 09:24:44 +0000 21 January 2020 Laurence Broers Associate Fellow, Russia and Eurasia Programme @LaurenceBroers Building on the legacies of a long-term British investment in a peace strategy for the South Caucasus is a realistic and attainable goal. 2020-01-21-NK.jpg A building in Nagorny Karabakh flies the flag of the self-proclaimed republic. 'Abkhazia, South Ossetia and Nagorny Karabakh have evolved into examples of what scholars call "de facto states" that, to differing degrees, control territory, provide governance and exercise internal sovereignty,' writes Laurence Broers. Photo: Getty Images. What does Britain’s departure from the EU mean for the country’s policy towards the South Caucasus, a small region on the periphery of Europe, fractured by conflict? Although Britain is not directly involved in any of the region’s peace processes (except in the case of the Geneva International Discussions on conflicts involving Georgia, as an EU member state), it has been a significant stakeholder in South Caucasian stability since the mid-1990s.Most obviously, Britain has been the single largest foreign investor in Caspian oil and gas. Yet beyond pipelines, Britain also has been a significant investor in long-term civil society-led strategies to build peace in the South Caucasus.Through what was then the Global Conflict Prevention Pool, in the early 2000s the Department for International Development (DfID) pioneered large-scale peacebuilding interventions, such as the Consortium Initiative, addressing Armenian-Azerbaijani conflict, in 2003-09. These built civic networks in the South Caucasus and partnerships with British-based NGOs.This experience left a strong intellectual legacy. British expertise on the South Caucasus, including specific expertise on its conflicts, is highly regarded in the region and across the world.There is also a strong tradition of British scholarship on the Caucasus, and several British universities offer Caucasus-related courses. Through schemes such as the John Smith Fellowship Trust, the Robert Bosch Stiftung Academy Fellowship at Chatham House and Chevening Scholarships, significant numbers of young leaders from the South Caucasus have spent time in British institutions and built effective relationships within them.Three challengesThis niche as a champion of long-term, strategic peacebuilding and repository of area-specific knowledge should not be lost as Britain’s relationship with the EU and regional actors evolves. This can be ensured through awareness of three challenges confronting a post-Brexit Caucasus policy.The first challenge for London is to avoid framing a regional policy in the South Caucasus as an extension of a wider ‘Russia policy’. Deteriorating Russian-British relations in recent years strengthen a tendency to view policies in the European neighbourhood through the traditional prisms of Cold War and Russian-Western rivalries.Yet an overwhelming focus on Russia fails to capture other important aspects of political developments in South Caucasus conflicts. Although often referred to as ‘breakaway’ or ‘occupied’ territories, Abkhazia, South Ossetia and Nagorny Karabakh are not ungoverned spaces. They have evolved into examples of what scholars call ‘de facto states’ that, to differing degrees, control territory, provide governance and exercise internal sovereignty.Few disagree that these entities would not survive without external patronage. But neither does that patronage explain their sustainability on its own. Russia-centricity diminishes Britain’s latitude to engage on the full range of local drivers sustaining these entities, contributing instead to less effective policies predicated on competition and containment.A second and related challenge is to maintain and develop Britain’s position on the issue of engaging populations in these entities. De facto states appear to stand outside of the international rules-based system. Yet in many cases, their civil societies are peopled by skilled and motivated activists who want their leaders to be held accountable according to international rules.Strategies of isolation ignore these voices and contribute instead to fearful and demoralized communities less likely to engage in a transformation of adversarial relationships. Making this case with the wider international community, and facilitating the funding of local civil societies in contested territories, would be important steps in sustaining an effective British policy on the resolution of conflicts. The third challenge for Britain is to maintain a long-term approach to the conflicts of the South Caucasus alongside potential short-term imperatives in other policy fields, as relationships shift post-Brexit.In this fluid international environment, the Foreign and Commonwealth Office has a role to play both as an internal champion of a long-term peacebuilding strategy and a coordinator of British efforts with those of multilateral actors engaged in the South Caucasus. These include the United Nations, the EU’s Special Representative for the South Caucasus and the Crisis in Georgia and OSCE’s Special Representative for the OSCE Chairperson-in-Office for the South Caucasus, all of which have built relationships with relevant actors on the ground.RecommendationsBritain’s niche as a champion and advocate of a strategic approach to peaceful change can be secured post-Brexit in the following ways. First, in-house expertise is crucial to effective peacebuilding programming. The Foreign Office’s research analysts play a vital role in generating independent internal advice and liaising with academic and NGO communities. Their role could be supplemented by the reinstatement of a regional conflict adviser post, based in Tbilisi, tasked with strengthening Britain’s regional presence on conflict issues and coordinating policy at a regional level.This post, with a remit to cover conflicts and build up area knowledge and relationships can contribute significantly to working closely with local civil societies, where so much expertise and knowledge resides, as well as other stakeholders.Second, programming should build in conflict sensitivity by dissociating eligibility from contested political status. This can encourage local populations to take advantage of opportunities for funding, study, comparative learning and professional development irrespective of the status of the entity where they reside.The Chevening Scholarships are an excellent example, whereby applicants can select ‘South Caucasus’ as their affiliated identity from a drop-down menu. This enables citizens from across the region to apply irrespective of the status of the territory in which they live. Finally, a holistic understanding of peace is crucial. Programming in unrecognized or partially-recognized entities should acknowledge that effective peacebuilding needs to embrace political dynamics and processes beyond cross-conflict contact and confidence building. Local actors in such entities may find peacebuilding funding streams defined exclusively in terms of cross-conflict contact more politically risky and ineffective in addressing domestic blockages to peace.While cross-conflict dynamics remain critical, ‘single-community’ programming framed in terms of civic participation, inclusion, civil society capacity-building, minority and human rights in contested territories, and building the confidence from within to engage in constructive dialogue, are no less important.The ’global Britain’ promised by Brexit remains a fanciful idea. Quiet, painstaking work to build on the legacies of a long-term British investment in a peace strategy for the South Caucasus, on the other hand, is a realistic and attainable goal. Full Article
ut Putin or the System? By feedproxy.google.com Published On :: Wed, 05 Feb 2020 16:00:01 +0000 Invitation Only Research Event 20 February 2020 - 11:30am to 1:00pm Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Brian Taylor, Professor of Political Science and Chair, Maxwell School at Syracuse University; author of The Code of PutinismChair: Keir Giles, Senior Consulting Fellow, Russia and Eurasia Programme, Chatham House; author of Moscow Rules: What Drives Russia to Confront the West To what extent are Russia's actions the product of one man's worldview? What events, ideas, psychologies and emotions have shaped Vladimir Putin and his inner circle over the past two decades? Is Russia headed for more of the same in the decades to come or is meaningful change possible? This event will examine Russia's, the Kremlin's and Putin's visions of the world and ask if they are indeed one and the same. Department/project Russia and Eurasia Programme, Russia's Domestic Politics, Russian Foreign Policy, The Drivers of Russian Foreign Policy Anna Morgan Administrator, Ukraine Forum +44 (0)20 7389 3274 Email Full Article
ut Japan-Russia Relations in the Abe-Putin Era By feedproxy.google.com Published On :: Mon, 24 Feb 2020 17:15:01 +0000 Research Event 16 April 2020 - 1:00pm to 2:00pm Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Alexander Bukh, Senior Lecturer, International Relations, Victoria University, Wellington, New Zealand; Author of These Islands Are Ours: The Social Construction of Territorial Disputes in Northeast Asia (Stanford University Press 2020)Chair: Mathieu Boulègue, Research Fellow, Russia and Eurasia Programme Japan and Russia are often referred to as 'distant neighbours'. In the early days of Prime Minister Shinzo Abe's second term in 2012, Japan sought to open a new era of bilateral relations with Russia. However, recent negotiations on the Kuril Islands/Northern Territories territorial dispute have stalled. Despite Abe’s extensive efforts to resolve the dispute, no concrete agreement has been reached so far. The speaker will provide an overview of the current state of Japan-Russia relations, including the prospect of resolving the territorial dispute during Prime Minister Abe's remaining days in office. Department/project Asia-Pacific Programme, Conflict, Peace and Stability, Geopolitics and Governance, Russia and Eurasia Programme, Russian Foreign Policy Lucy Ridout Programme Administrator, Asia-Pacific Programme +44 (0) 207 314 2761 Email Full Article
ut Virtual Roundtable: Re-integration or Dis-integration: What Does the Future Hold for Occupied Donbas? By feedproxy.google.com Published On :: Tue, 21 Apr 2020 22:55:01 +0000 Invitation Only Research Event 28 April 2020 - 4:00pm to 5:30pm Event participants Paul D’anieri, Professor of Public Policy and Political Science, University of California, RiversideVlad Mykhnenko, Associate Professor of Sustainable Urban Development, St Peter’s College, University of OxfordChair: Orysia Lutsevych, Research Fellow and Manager, Ukraine Forum, Chatham House The armed conflict in Donbas has now entered its seventh year. President Zelenskyy, who came to power in May 2019, promised to end the war with Russia and bring peace to Ukraine.Since assuming office, Zelenskyy has managed to revive the Normandy Format talks, complete military disengagement at three points along the line of contact and negotiate the release of over a hundred Ukrainians held as prisoners of war in Russia. However, ceasefire violations continue to occur frequently.Looking at the origins of the armed conflict in Donbas and the region’s economic role in Ukraine’s economy, this event discusses the prospects for conflict resolution. Do the recent events signify an opportunity for peace? Does Zelenskyy have a viable plan for re-integrating Donbas or will the region be cut off from mainland Ukraine for the foreseeable future?The speakers assess the strategy and track record of the Ukrainian government and its Western allies in bringing parts of the occupied Donbas under Kyiv’s control. They also review possible policy implications of the COVID-19 pandemic for the conflict. Department/project Russia and Eurasia Programme, Ukraine Forum Anna Morgan Administrator, Ukraine Forum +44 (0)20 7389 3274 Email Full Article
ut Quantification of bile acids: a mass spectrometry platform for studying gut microbe connection to metabolic diseases [Research Articles] By feedproxy.google.com Published On :: 2020-02-01T00:05:23-08:00 Bile acids (BAs) serve multiple biological functions, ranging from the absorption of lipids and fat-soluble vitamins to serving as signaling molecules through the direct activation of dedicated cellular receptors. Synthesized by both host and microbial pathways, BAs are increasingly understood as participating in the regulation of numerous pathways relevant to metabolic diseases, including lipid and glucose metabolism, energy expenditure, and inflammation. Quantitative analyses of BAs in biological matrices can be problematic due to their unusual and diverse physicochemical properties, making optimization of a method that shows good accuracy, precision, efficiency of extraction, and minimized matrix effects across structurally distinct human and murine BAs challenging. Herein we develop and clinically validate a stable-isotope-dilution LC/MS/MS method for the quantitative analysis of numerous primary and secondary BAs in both human and mouse biological matrices. We also utilize this tool to investigate gut microbiota participation in the generation of structurally specific BAs in both humans and mice. We examine circulating levels of specific BAs and in a clinical case-control study of age- and gender-matched type 2 diabetes mellitus (T2DM) versus nondiabetics. BAs whose circulating levels are associated with T2DM include numerous 12α-hydroxyl BAs (taurocholic acid, taurodeoxycholic acid, glycodeoxycholic acid, deoxycholic acid, and 3-ketodeoxycholic acid), while taurohyodeoxycholic acid was negatively associated with diabetes. The LC/MS/MS-based platform described should serve as a robust, high-throughput investigative tool for studying the potential involvement of structurally specific BAs and the gut microbiome on both physiological and disease processes. Full Article
ut Novel GPR120 agonist TUG891 modulates fat taste perception and preference and activates tongue-brain-gut axis in mice [Research Articles] By feedproxy.google.com Published On :: 2020-02-01T00:05:23-08:00 GPR120 is implicated as a lipid receptor in the oro-sensory detection of dietary fatty acids. However, the effects of GPR120 activation on dietary fat intake or obesity are not clearly understood. We investigated to determine whether the binding of TUG891, a novel GPR120 agonist, to lingual GPR120 modulates fat preference in mice. We explored the effects of TUG891 on obesity-related hormones and conducted behavioral choice tests on mice to better understand the physiologic relevance of the action of TUG891. In cultured mouse and human taste bud cells (TBCs), TUG891 induced a rapid increase in Ca2+ by acting on GPR120. A long-chain dietary fatty acid, linoleic acid (LA), also recruited Ca2+ via GPR120 in human and mouse TBCs. Both TUG891 and LA induced ERK1/2 phosphorylation and enhanced in vitro release of glucagon-like peptide-1 from cultured human and mouse TBCs. In situ application of TUG891 onto the tongue of anesthetized mice triggered the secretion of pancreatobiliary juice, probably via the tongue-brain-gut axis. Furthermore, lingual application of TUG891 altered circulating concentrations of cholecystokinin and adipokines, associated with decreased circulating LDL, in conscious mice. In behavioral tests, mice exhibited a spontaneous preference for solutions containing either TUG891 or LA instead of a control. However, addition of TUG891 to a solution containing LA significantly curtailed fatty acid preference. Our study demonstrates that TUG891 binds to lingual GPR120 receptors, activates the tongue-brain-gut axis, and modulates fat preference. These findings may support the development of new fat taste analogs that can change the approach to obesity prevention and treatment. Full Article
ut Worming our way toward multiple evolutionary origins of convergent sterol pathways [Commentary] By feedproxy.google.com Published On :: 2020-02-01T00:05:23-08:00 Full Article
ut Nonsynonymous SNPs in LPA homologous to plasminogen deficiency mutants represent novel null apo(a) alleles [Patient-Oriented and Epidemiological Research] By feedproxy.google.com Published On :: 2020-03-01T00:06:33-08:00 Plasma lipoprotein (a) [Lp(a)] levels are largely determined by variation in the LPA gene, which codes for apo(a). Genome-wide association studies (GWASs) have identified nonsynonymous variants in LPA that associate with low Lp(a) levels, although their effect on apo(a) function is unknown. We investigated two such variants, R990Q and R1771C, which were present in four null Lp(a) individuals, for structural and functional effects. Sequence alignments showed the R990 and R1771 residues to be highly conserved and homologous to each other and to residues associated with plasminogen deficiency. Structural modeling showed both residues to make several polar contacts with neighboring residues that would be ablated on substitution. Recombinant expression of the WT and R1771C apo(a) in liver and kidney cells showed an abundance of an immature form for both apo(a) proteins. A mature form of apo(a) was only seen with the WT protein. Imaging of the recombinant apo(a) proteins in conjunction with markers of the secretory pathway indicated a poor transit of R1771C into the Golgi. Furthermore, the R1771C mutant displayed a glycosylation pattern consistent with ER, but not Golgi, glycosylation. We conclude that R1771 and the equivalent R990 residue facilitate correct folding of the apo(a) kringle structure and mutations at these positions prevent the proper folding required for full maturation and secretion. To our knowledge, this is the first example of nonsynonymous variants in LPA being causative of a null Lp(a) phenotype. Full Article
ut Hepatic PLIN5 signals via SIRT1 to promote autophagy and prevent inflammation during fasting [Research Articles] By feedproxy.google.com Published On :: 2020-03-01T00:06:33-08:00 Lipid droplets (LDs) are energy-storage organelles that are coated with hundreds of proteins, including members of the perilipin (PLIN) family. PLIN5 is highly expressed in oxidative tissues, including the liver, and is thought to play a key role in uncoupling LD accumulation from lipotoxicity; however, the mechanisms behind this action are incompletely defined. We investigated the role of hepatic PLIN5 in inflammation and lipotoxicity in a murine model under both fasting and refeeding conditions and in hepatocyte cultures. PLIN5 ablation with antisense oligonucleotides triggered a pro-inflammatory response in livers from mice only under fasting conditions. Similarly, PLIN5 mitigated lipopolysaccharide- or palmitic acid-induced inflammatory responses in hepatocytes. During fasting, PLIN5 was also required for the induction of autophagy, which contributed to its anti-inflammatory effects. The ability of PLIN5 to promote autophagy and prevent inflammation were dependent upon signaling through sirtuin 1 (SIRT1), which is known to be activated in response to nuclear PLIN5 under fasting conditions. Taken together, these data show that PLIN5 signals via SIRT1 to promote autophagy and prevent FA-induced inflammation as a means to maintain hepatocyte homeostasis during periods of fasting and FA mobilization. Full Article
ut Tissue-specific analysis of lipid species in Drosophila during overnutrition by UHPLC-MS/MS and MALDI-MSI [Research Articles] By feedproxy.google.com Published On :: 2020-03-01T00:06:33-08:00 Diets high in calories can be used to model metabolic diseases, including obesity and its associated comorbidities, in animals. Drosophila melanogaster fed high-sugar diets (HSDs) exhibit complications of human obesity including hyperglycemia, hyperlipidemia, insulin resistance, cardiomyopathy, increased susceptibility to infection, and reduced longevity. We hypothesize that lipid storage in the high-sugar-fed fly’s fat body (FB) reaches a maximum capacity, resulting in the accumulation of toxic lipids in other tissues or lipotoxicity. We took two approaches to characterize tissue-specific lipotoxicity. Ultra-HPLC-MS/MS and MALDI-MS imaging enabled spatial and temporal localization of lipid species in the FB, heart, and hemolymph. Substituent chain length was diet dependent, with fewer odd chain esterified FAs on HSDs in all sample types. By contrast, dietary effects on double bond content differed among organs, consistent with a model where some substituent pools are shared and others are spatially restricted. Both di- and triglycerides increased on HSDs in all sample types, similar to observations in obese humans. Interestingly, there were dramatic effects of sugar feeding on lipid ethers, which have not been previously associated with lipotoxicity. Taken together, we have identified candidate endocrine mechanisms and molecular targets that may be involved in metabolic disease and lipotoxicity. Full Article
ut In Memoriam: Lina M. Obeid (1957-2019) [Tribute] By feedproxy.google.com Published On :: 2020-04-01T00:05:29-07:00 Full Article
ut SSO and other putative inhibitors of FA transport across membranes by CD36 disrupt intracellular metabolism, but do not affect FA translocation [Research Articles] By feedproxy.google.com Published On :: 2020-05-01T00:05:28-07:00 Membrane-bound proteins have been proposed to mediate the transport of long-chain FA (LCFA) transport through the plasma membrane (PM). These proposals are based largely on reports that PM transport of LCFAs can be blocked by a number of enzymes and purported inhibitors of LCFA transport. Here, using the ratiometric pH indicator (2',7'-bis-(2-carboxyethyl)-5-(and-6-)-carboxyfluorescein and acrylodated intestinal FA-binding protein-based dual fluorescence assays, we investigated the effects of nine inhibitors of the putative FA transporter protein CD36 on the binding and transmembrane movement of LCFAs. We particularly focused on sulfosuccinimidyl oleate (SSO), reported to be a competitive inhibitor of CD36-mediated LCFA transport. Using these assays in adipocytes and inhibitor-treated protein-free lipid vesicles, we demonstrate that rapid LCFA transport across model and biological membranes remains unchanged in the presence of these purported inhibitors. We have previously shown in live cells that CD36 does not accelerate the transport of unesterified LCFAs across the PM. Our present experiments indicated disruption of LCFA metabolism inside the cell within minutes upon treatment with many of the "inhibitors" previously assumed to inhibit LCFA transport across the PM. Furthermore, using confocal microscopy and a specific anti-SSO antibody, we found that numerous intracellular and PM-bound proteins are SSO-modified in addition to CD36. Our results support the hypothesis that LCFAs diffuse rapidly across biological membranes and do not require an active protein transporter for their transmembrane movement. Full Article
ut Schnyder corneal dystrophy-associated UBIAD1 is defective in MK-4 synthesis and resists autophagy-mediated degradation [Research Articles] By feedproxy.google.com Published On :: 2020-05-01T00:05:27-07:00 The autosomal dominant disorder Schnyder corneal dystrophy (SCD) is caused by mutations in UbiA prenyltransferase domain-containing protein-1 (UBIAD1), which uses geranylgeranyl pyrophosphate (GGpp) to synthesize the vitamin K2 subtype menaquinone-4 (MK-4). SCD is characterized by opacification of the cornea, owing to aberrant build-up of cholesterol in the tissue. We previously discovered that sterols stimulate association of UBIAD1 with ER-localized HMG-CoA reductase, which catalyzes a rate-limiting step in the synthesis of cholesterol and nonsterol isoprenoids, including GGpp. Binding to UBIAD1 inhibits sterol-accelerated ER-associated degradation (ERAD) of reductase and permits continued synthesis of GGpp in cholesterol-replete cells. GGpp disrupts UBIAD1-reductase binding and thereby allows for maximal ERAD of reductase as well as ER-to-Golgi translocation of UBIAD1. SCD-associated UBIAD1 is refractory to GGpp-mediated dissociation from reductase and remains sequestered in the ER to inhibit ERAD. Here, we report development of a biochemical assay for UBIAD1-mediated synthesis of MK-4 in isolated membranes and intact cells. Using this assay, we compared enzymatic activity of WT UBIAD1 with that of SCD-associated variants. Our studies revealed that SCD-associated UBIAD1 exhibited reduced MK-4 synthetic activity, which may result from its reduced affinity for GGpp. Sequestration in the ER protects SCD-associated UBIAD1 from autophagy and allows intracellular accumulation of the mutant protein, which amplifies the inhibitory effect on reductase ERAD. These findings have important implications not only for the understanding of SCD etiology but also for the efficacy of cholesterol-lowering statin therapy, which becomes limited, in part, because of UBIAD1-mediated inhibition of reductase ERAD. Full Article
ut The grease trap: uncovering the mechanism of the hydrophobic lid in Cutibacterium acnes lipase [Research Articles] By feedproxy.google.com Published On :: 2020-05-01T00:05:27-07:00 Acne is one of the most common dermatological conditions, but the details of its pathology are unclear, and current management regimens often have adverse effects. Cutibacterium acnes is known as a major acne-associated bacterium that derives energy from lipase-mediated sebum lipid degradation. C. acnes is commensal, but lipase activity has been observed to differ among C. acnes types. For example, higher populations of the type IA strains are present in acne lesions with higher lipase activity. In the present study, we examined a conserved lipase in types IB and II that was truncated in type IA C. acnes strains. Closed, blocked, and open structures of C. acnes ATCC11828 lipases were elucidated by X-ray crystallography at 1.6–2.4 Å. The closed crystal structure, which is the most common form in aqueous solution, revealed that a hydrophobic lid domain shields the active site. By comparing closed, blocked, and open structures, we found that the lid domain-opening mechanisms of C. acnes lipases (CAlipases) involve the lid-opening residues, Phe-179 and Phe-211. To the best of our knowledge, this is the first structure-function study of CAlipases, which may help to shed light on the mechanisms involved in acne development and may aid in future drug design. Full Article
ut Lipid rafts as a therapeutic target [Thematic Reviews] By feedproxy.google.com Published On :: 2020-05-01T00:05:27-07:00 Lipid rafts regulate the initiation of cellular metabolic and signaling pathways by organizing the pathway components in ordered microdomains on the cell surface. Cellular responses regulated by lipid rafts range from physiological to pathological, and the success of a therapeutic approach targeting "pathological" lipid rafts depends on the ability of a remedial agent to recognize them and disrupt pathological lipid rafts without affecting normal raft-dependent cellular functions. In this article, concluding the Thematic Review Series on Biology of Lipid Rafts, we review current experimental therapies targeting pathological lipid rafts, including examples of inflammarafts and clusters of apoptotic signaling molecule-enriched rafts. The corrective approaches include regulation of cholesterol and sphingolipid metabolism and membrane trafficking by using HDL and its mimetics, LXR agonists, ABCA1 overexpression, and cyclodextrins, as well as a more targeted intervention with apoA-I binding protein. Among others, we highlight the design of antagonists that target inflammatory receptors only in their activated form of homo- or heterodimers, when receptor dimerization occurs in pathological lipid rafts. Other therapies aim to promote raft-dependent physiological functions, such as augmenting caveolae-dependent tissue repair. The overview of this highly dynamic field will provide readers with a view on the emerging concept of targeting lipid rafts as a therapeutic strategy. Full Article
ut The ins and outs of lipid rafts: functions in intracellular cholesterol homeostasis, microparticles, and cell membranes [Thematic Reviews] By feedproxy.google.com Published On :: 2020-05-01T00:05:27-07:00 Cellular membranes are not homogenous mixtures of proteins; rather, they are segregated into microdomains on the basis of preferential association between specific lipids and proteins. These microdomains, called lipid rafts, are well known for their role in receptor signaling on the plasma membrane (PM) and are essential to such cellular functions as signal transduction and spatial organization of the PM. A number of disease states, including atherosclerosis and other cardiovascular disorders, may be caused by dysfunctional maintenance of lipid rafts. Lipid rafts do not occur only in the PM but also have been found in intracellular membranes and extracellular vesicles (EVs). Here, we focus on discussing newly discovered functions of lipid rafts and microdomains in intracellular membranes, including lipid and protein trafficking from the ER, Golgi bodies, and endosomes to the PM, and we examine lipid raft involvement in the production and composition of EVs. Because lipid rafts are small and transient, visualization remains challenging. Future work with advanced techniques will continue to expand our knowledge about the roles of lipid rafts in cellular functioning. Full Article
ut Commentary on SSO and other putative inhibitors of FA transport across membranes by CD36 disrupt intracellular metabolism, but do not affect fatty acid translocation [Commentaries] By feedproxy.google.com Published On :: 2020-05-01T00:05:27-07:00 Full Article
ut Problem Notes for SAS®9 - 65939: "ERROR: Unable to transcode data to/from UCS-2 encoding" occurs when you run an SQL query using SAS/ACCESS Interface to ODBC on SAS 9.4M5 with UTF-8 By feedproxy.google.com Published On :: Fri, 8 May 2020 11:20:02 EST When you run an SQL query using SAS/ACCESS Interface to ODBC under the following conditions, you might receive an error: You run SAS 9.4M5 (TS1M5) or SAS 9.4M6 (TS1M6) i Full Article ODBC+SAS/ACCESS+Interface+to+ODBC
ut Problem Notes for SAS®9 - 65834: PROC METADATA returns various errors when the input contains certain multi-byte characters By feedproxy.google.com Published On :: Thu, 7 May 2020 17:12:13 EST The METADATA procedure might return an error similar to one of the following: ERROR: Missing root element definition. Full Article BASE+Base+SAS
ut Problem Notes for SAS®9 - 60332: A SAS 9.4 installation in Update mode notifies you about unwritable files in the "SASHome\SASWebApplicationServer" directory By feedproxy.google.com Published On :: Wed, 6 May 2020 14:49:04 EST When you run SAS Deployment Wizard to install or update SAS 9.4 software, the file system is examined. If any files that the wizard needs to delete are found to be locked, they are reported as unwritable f Full Article BASE+Base+SAS
ut Problem Notes for SAS®9 - 65918: SAS Workflow Services fails to respond after a com.sas.workflow.engine.policy.PolicyExecutionException error occurs for a workflow instance By feedproxy.google.com Published On :: Wed, 6 May 2020 13:42:50 EST When the problem occurs, you are unable to perform any workflow actions in a SAS solution that uses SAS Workflow Services. Full Article WEBINFPLTFM+SAS+Web+Infrastructure+Platf
ut Problem Notes for SAS®9 - 65922: Trying to read a Google BigQuery table that contains a variable defined as an array might result in a panic error and SAS shutting down By feedproxy.google.com Published On :: Wed, 6 May 2020 10:30:19 EST Trying to read a Google BigQuery table that contains a variable that is defined as an array of records might result in an error and cause SAS to shut down. This issue occurs when one of the variables contained in Full Article BIGQUERY+SAS/ACCESS+Interface+to+Google+
ut Problem Notes for SAS®9 - 65295: The order of columns is not maintained when you select columns for output in the Business Rules transformation By feedproxy.google.com Published On :: Wed, 6 May 2020 10:01:07 EST In SAS Data Integration Studio, the columns that you select to include in the target table in a Business Rules transformation appear in the Selected columns area in a random order. Th Full Article DATABUILDER+SAS+Data+Integration+Studio
ut Problem Notes for SAS®9 - 65916: Accessing a Google BigQuery table without including the SCHEMA= option in the LIBNAME statement might result in an error By feedproxy.google.com Published On :: Wed, 6 May 2020 09:41:22 EST When you issue a LIBNAME statement for a Google BigQuery database without including the SCHEMA= option, all tables in the project are shown when the libref is expanded. However, if you try to acces Full Article BIGQUERY+SAS/ACCESS+Interface+to+Google+
ut Problem Notes for SAS®9 - 34294: A missing discrete dependent variable in the selection model together with a OUTPUT statement might cause an Access Violation error By feedproxy.google.com Published On :: Tue, 5 May 2020 13:04:13 EST If the following conditions are met in PROC QLIM: the SELECT option and DISCRETE option are specified in the same MODEL statement or ENDOGENOUS statement the same dependent variable with S Full Article ETS+SAS/ETS
ut Problem Notes for SAS®9 - 65903: You see a "java.lang.IllegalArgumentException" error in the log file when you use the IFRS9_Cycle workflow template in SAS Solution for IFRS 9 By feedproxy.google.com Published On :: Fri, 1 May 2020 18:01:29 EST The problem occurs on a content release on the SAS Risk Governance Framework. Full Article RGPBNDL+SAS+Risk+Governance+Framework
ut Problem Notes for SAS®9 - 65872: You see a "java.lang.IllegalArgumentException" error in the log file when you use the CECL_Cycle workflow template in SAS Solution for CECL By feedproxy.google.com Published On :: Fri, 1 May 2020 16:53:01 EST The problem occurs on a content release on the SAS Risk Governance Framework. Full Article RGPBNDL+SAS+Risk+Governance+Framework
ut Problem Notes for SAS®9 - 65883: SAS Workflow Studio returns a "cannot load" error when you try to open the CECL_Cycle_AFS workflow template for SAS Solution for CECL By feedproxy.google.com Published On :: Mon, 27 Apr 2020 16:10:54 EST You might see the following error in SAS Workflow Studio when you try to open the CECL_Cycle_AFS workflow template that is shipped with SAS Solution for CECL: Full Article RGPBNDL+SAS+Risk+Governance+Framework
ut Problem Notes for SAS®9 - 65868: Saving a report distribution in SAS Visual Analytics Designer fails with "The name is invalid" By feedproxy.google.com Published On :: Fri, 24 Apr 2020 12:03:57 EST When you attempt to save a report distribution in SAS Visual Analytics Designer, you might see the error shown in the following display: imgalt="" src="{fusion_65868_1_distributionerror.png}" /> Full Article VISANLYTBNDL+SAS+Visual+Analytics
ut Sternberg optimistic about 2019, Rays' stadium By mlb.mlb.com Published On :: Tue, 19 Feb 2019 17:49:38 EDT Rays principal owner Stuart Sternberg won't make any big prediction entering the 2019 season, but he still expressed a lot of enthusiasm during Tuesday's media session. Full Article
ut Life without air [Lipids] By feedproxy.google.com Published On :: 2020-03-27T00:05:59-07:00 An early exposure to lipid biochemistry in the laboratory of Konrad Bloch resulted in a fascination with the biosynthesis, structures, and functions of bacterial lipids. The discovery of plasmalogens (1-alk-1'-enyl, 2-acyl phospholipids) in anaerobic Gram-positive bacteria led to studies on the physical chemistry of these lipids and the cellular regulation of membrane lipid polymorphism in bacteria. Later studies in several laboratories showed that the formation of the alk-1-enyl ether bond involves an aerobic process in animal cells and thus is fundamentally different from that in anaerobic organisms. Our work provides evidence for an anaerobic process in which plasmalogens are formed from their corresponding diacyl lipids. Studies on the roles of phospholipases in Listeria monocytogenes revealed distinctions between its phospholipases and those previously discovered in other bacteria and showed how the Listeria enzymes are uniquely fitted to the intracellular lifestyle of this significant human pathogen. Full Article
ut Management of severe acute pancreatitis By feeds.bmj.com Published On :: Monday, December 2, 2019 - 13:11 Full Article
ut Linking risk factors and outcomes in autism spectrum disorder: is there evidence for resilience? By feeds.bmj.com Published On :: Tuesday, January 28, 2020 - 10:26 Full Article
ut Management of acute ischemic stroke By feeds.bmj.com Published On :: Thursday, February 13, 2020 - 15:06 Full Article
ut Current and future treatments for tuberculosis By feeds.bmj.com Published On :: Monday, March 2, 2020 - 11:05 Full Article
ut Autoimmune complications of immunotherapy: pathophysiology and management By feeds.bmj.com Published On :: Monday, April 6, 2020 - 10:45 Full Article
ut Noncatalytic Bruton's tyrosine kinase activates PLC{gamma}2 variants mediating ibrutinib resistance in human chronic lymphocytic leukemia cells [Membrane Biology] By feedproxy.google.com Published On :: 2020-04-24T06:08:45-07:00 Treatment of patients with chronic lymphocytic leukemia (CLL) with inhibitors of Bruton's tyrosine kinase (BTK), such as ibrutinib, is limited by primary or secondary resistance to this drug. Examinations of CLL patients with late relapses while on ibrutinib, which inhibits BTK's catalytic activity, revealed several mutations in BTK, most frequently resulting in the C481S substitution, and disclosed many mutations in PLCG2, encoding phospholipase C-γ2 (PLCγ2). The PLCγ2 variants typically do not exhibit constitutive activity in cell-free systems, leading to the suggestion that in intact cells they are hypersensitive to Rac family small GTPases or to the upstream kinases spleen-associated tyrosine kinase (SYK) and Lck/Yes-related novel tyrosine kinase (LYN). The sensitivity of the PLCγ2 variants to BTK itself has remained unknown. Here, using genetically-modified DT40 B lymphocytes, along with various biochemical assays, including analysis of PLCγ2-mediated inositol phosphate formation, inositol phospholipid assessments, fluorescence recovery after photobleaching (FRAP) static laser microscopy, and determination of intracellular calcium ([Ca2+]i), we show that various CLL-specific PLCγ2 variants such as PLCγ2S707Y are hyper-responsive to activated BTK, even in the absence of BTK's catalytic activity and independently of enhanced PLCγ2 phospholipid substrate supply. At high levels of B-cell receptor (BCR) activation, which may occur in individual CLL patients, catalytically-inactive BTK restored the ability of the BCR to mediate increases in [Ca2+]i. Because catalytically-inactive BTK is insensitive to active-site BTK inhibitors, the mechanism involving the noncatalytic BTK uncovered here may contribute to preexisting reduced sensitivity or even primary resistance of CLL to these drugs. Full Article
ut MtrP, a putative methyltransferase in Corynebacteria, is required for optimal membrane transport of trehalose mycolates [Lipids] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 Pathogenic bacteria of the genera Mycobacterium and Corynebacterium cause severe human diseases such as tuberculosis (Mycobacterium tuberculosis) and diphtheria (Corynebacterium diphtheriae). The cells of these species are surrounded by protective cell walls rich in long-chain mycolic acids. These fatty acids are conjugated to the disaccharide trehalose on the cytoplasmic side of the bacterial cell membrane. They are then transported across the membrane to the periplasm where they act as donors for other reactions. We have previously shown that transient acetylation of the glycolipid trehalose monohydroxycorynomycolate (hTMCM) enables its efficient transport to the periplasm in Corynebacterium glutamicum and that acetylation is mediated by the membrane protein TmaT. Here, we show that a putative methyltransferase, encoded at the same genetic locus as TmaT, is also required for optimal hTMCM transport. Deletion of the C. glutamicum gene NCgl2764 (Rv0224c in M. tuberculosis) abolished acetyltrehalose monocorynomycolate (AcTMCM) synthesis, leading to accumulation of hTMCM in the inner membrane and delaying its conversion to trehalose dihydroxycorynomycolate (h2TDCM). Complementation with NCgl2764 normalized turnover of hTMCM to h2TDCM. In contrast, complementation with NCgl2764 derivatives mutated at residues essential for methyltransferase activity failed to rectify the defect, suggesting that NCgl2764/Rv0224c encodes a methyltransferase, designated here as MtrP. Comprehensive analyses of the individual mtrP and tmaT mutants and of a double mutant revealed strikingly similar changes across several lipid classes compared with WT bacteria. These findings indicate that both MtrP and TmaT have nonredundant roles in regulating AcTMCM synthesis, revealing additional complexity in the regulation of trehalose mycolate transport in the Corynebacterineae. Full Article