The cellular energy sensor AMP-activated protein kinase (AMPK) is a metabolic regulator that mediates adaptation to nutritional variations to maintain a proper energy balance in cells. We show here that suckling-weaning and fasting-refeeding transitions in rodents are associated with changes in AMPK activation and the cellular energy state in the liver. These nutritional transitions were characterized by a metabolic switch from lipid to glucose utilization, orchestrated by modifications in glucose levels and the glucagon/insulin ratio in the bloodstream. We therefore investigated the respective roles of glucose and pancreatic hormones on AMPK activation in mouse primary hepatocytes. We found that glucose starvation transiently activates AMPK, whereas changes in glucagon and insulin levels had no impact on AMPK. Challenge of hepatocytes with metformin-induced metabolic stress strengthened both AMPK activation and cellular energy depletion under limited-glucose conditions, whereas neither glucagon nor insulin altered AMPK activation. Although both insulin and glucagon induced AMPKα phosphorylation at its Ser485/491 residue, they did not affect its activity. Finally, the decrease in cellular ATP levels in response to an energy stress was additionally exacerbated under fasting conditions and by AMPK deficiency in hepatocytes, revealing metabolic inflexibility and emphasizing the importance of AMPK for maintaining hepatic energy charge. Our results suggest that nutritional changes (i.e. glucose availability), rather than the related hormonal changes (i.e. the glucagon/insulin ratio), sensitize AMPK activation to the energetic stress induced by the dietary transition during fasting. This effect is critical for preserving the cellular energy state in the liver.

(Memorial Sloan Kettering Cancer Center) Scientists at the Sloan Kettering Institute have solved the puzzle of how small chromosomes ensure that they aren't skipped over during meiosis, the process that makes sperm and egg.

(Cell Press) In a study appearing April 30 in the journal Current Biology, scientists tell the story of three 16th century African slaves identified from a mass burial site in Mexico City. Using a combination of genetic, osteological, and isotope analyses, the scientists determined from where in Africa they were likely captured, the physical hardships they experienced as slaves, and what novel pathogens they may have carried with them across the Atlantic.

(NOAA Headquarters) While the global average number of tropical cyclones each year has not budged from 86 over the last four decades, climate change has been influencing the locations of where these deadly storms occur, according to new NOAA-led research published in Proceedings of the National Academy of Science.

Up-and-coming recording artiste Kaay Jones says she did not know she was becoming part of a transformational music project that would connect her to a wide cross section of talent in the Caribbean. Jones carries Jamaica's flag in a unified...

Earthquake: 2020-05-06 21:54HKT M6.7 [7.0S, 130.0E] in Tanimbar Islands Region, Indonesia http://openstreetmap.org/?mlat=-7&mlon=130.

6 April 2018

The cellular energy sensor AMP-activated protein kinase (AMPK) is a metabolic regulator that mediates adaptation to nutritional variations to maintain a proper energy balance in cells. We show here that suckling-weaning and fasting-refeeding transitions in rodents are associated with changes in AMPK activation and the cellular energy state in the liver. These nutritional transitions were characterized by a metabolic switch from lipid to glucose utilization, orchestrated by modifications in glucose levels and the glucagon/insulin ratio in the bloodstream. We therefore investigated the respective roles of glucose and pancreatic hormones on AMPK activation in mouse primary hepatocytes. We found that glucose starvation transiently activates AMPK, whereas changes in glucagon and insulin levels had no impact on AMPK. Challenge of hepatocytes with metformin-induced metabolic stress strengthened both AMPK activation and cellular energy depletion under limited-glucose conditions, whereas neither glucagon nor insulin altered AMPK activation. Although both insulin and glucagon induced AMPKα phosphorylation at its Ser485/491 residue, they did not affect its activity. Finally, the decrease in cellular ATP levels in response to an energy stress was additionally exacerbated under fasting conditions and by AMPK deficiency in hepatocytes, revealing metabolic inflexibility and emphasizing the importance of AMPK for maintaining hepatic energy charge. Our results suggest that nutritional changes (i.e. glucose availability), rather than the related hormonal changes (i.e. the glucagon/insulin ratio), sensitize AMPK activation to the energetic stress induced by the dietary transition during fasting. This effect is critical for preserving the cellular energy state in the liver.

Chelsea DeLeon
May 1, 2020; 61:767-777
Research Articles

This week host Matt Egan is joined by PC Advisor staff writer Chris Minasians to chat about the AMD Radeon RX 480 graphics card and what this could mean for the future of virtual reality games. Fellow staff writer at PC Advisor Henry Burrell jumps in to talk about the "not terrible" Windows 10 phone as he starts using the Microsoft Lumia 950 and can't see what everyone's beef with it is (13:00). Finally Ashleigh Allsopp, engagement editor at Macworld UK chats about using your technology at concerts (24:30).  

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Matt Egan is back in the hosting chair to chat with producer Chris about the Samsung Galaxy Note 7 and how we feel about phablets. Techworld.com editor Charlotte Jee comes in to explain what is going on at the GDS (government digital service) and why we should care (13:00). Then online editor at Techworld.com Scott Carey chats Instagram stories, why it is a blatant rip off of Snapchat stories and how the social media giant can get away with being so brazen (22:00).  

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In episode 33 host David Price is joined by cool Christopher Minasians to shoot the breeze on the Galaxy Note 7 recall, remembering other devices that were literally on fire. Jumpin' Jim Martin (14 minutes) brings his sinister stylings to bear on the burgeoning GoPro market. And honey-voiced Henry Burrell (28 minutes) says hi to Google Allo. Listen very carefully, he will say this only once.  

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Allow Matt Egan (and Shed7) to lull you into this week's pod as we tackle the big tech issues of the week. Staff Writer at Digital Arts Miriam Harris explains the latest HR and PR mess over at Uber. How long will consumers use a service when the company are clearly not treating its staff well? Then (16:30) Deputy Editor of Macworld UK David Price gets excited about Apple Park, the so-called 'spaceship campus' that has been under construction for years. May contain orchards. Finally (26:48) Senior Staff Writer at Tech Advisor Henry Burrell previews Mobile World Congress which gets underway on 26th February. Are any of the major handset launches worth your attention?  

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Gather round as three men spend 30 minutes talking about tech. Wait, what do you mean 'no thanks'?! Matt Egan shares the mic with David Price and Henry Burrell to thrash out why Apple deemed a press release adequate to announce the successor to 2014's iPad Air 2. There's also a slick new red iPhone, and a black OnePlus 3T. What's with the limited editions, eh? Or are they even limited? The gang also chat about the developer preview of Android O, out now while Android N is barely months old. Is it too early to say if it'll kick ass, and why do Google and Apple need such long public lead time with new OS builds?  

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A quick-fire reaction Apple special, recorded the morning after new iPhones and an Apple Watch were announced at an event in California.

Henry Burrell joins David Price, Ashleigh Macro and Scott Carey to discuss which products we'll be buying, avoiding and coveting over the Christmas period.

Is the new iPhone named terribly? Is it an upgrade at all? What wasn't announced? And does Scott give the new Apple Watch any praise at all? It's all here.

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Many clinical studies and epidemiological investigations have clearly demonstrated that women are twice as likely to develop cholesterol gallstones as men, and oral contraceptives and other estrogen therapies dramatically increase that risk. Further, animal studies have revealed that estrogen promotes cholesterol gallstone formation through the estrogen receptor (ER) α, but not ERβ, pathway. More importantly, some genetic and pathophysiological studies have found that G protein-coupled estrogen receptor (GPER) 1 is a new gallstone gene, Lith18, on chromosome 5 in mice and produces additional lithogenic actions, working independently of ERα, to markedly increase cholelithogenesis in female mice. Based on computational modeling of GPER, a novel series of GPER-selective antagonists were designed, synthesized, and subsequently assessed for their therapeutic effects via calcium mobilization, cAMP, and ERα and ERβ fluorescence polarization binding assays. From this series of compounds, one new compound, 2-cyclohexyl-4-isopropyl-N-(4-methoxybenzyl)aniline (CIMBA), exhibits superior antagonism and selectivity exclusively for GPER. Furthermore, CIMBA reduces the formation of 17β-estradiol-induced gallstones in a dose-dependent manner in ovariectomized mice fed a lithogenic diet for 8 weeks. At 32 μg/day/kg CIMBA, no gallstones are found, even in ovariectomized ERα (^–/–) mice treated with 6 μg/day 17β-estradiol and fed the lithogenic diet for 8 weeks. In conclusion, CIMBA treatment protects against the formation of estrogen-induced cholesterol gallstones by inhibiting the GPER signaling pathway in female mice. CIMBA may thus be a new agent for effectively treating cholesterol gallstone disease in women.­

Steven Duggar and Ryder Jones continue to take steps forward in their rehab, as they were both cleared to take batting practice on the field Friday for the first time since their September surgeries.

We talk about financial conflicts of interest a lot atThe BMJ - and have take taken the decision that our educational content should be without them. We also talk a lot about non-financial conflicts of interest, but the choppy waters of those are much more difficult to navigate. In this podcast, we discuss whether we should, or if we could even...

On the podcast, we’ve talked a lot about the limits of medicine - where treatment doesn’t work, or potentially harms. But in that conversation, we’ve mainly focused on specific treatments. Now a new analysis, broadens that to talk about patients being admitted to a whole ward - intensive care. The authors of that article contend that, often,...

Joseph G. Yu
Oct 1, 2002; 51:2968-2974
Obesity Studies

Alan R Saltiel
Dec 1, 1996; 45:1661-1669
Perspectives in Diabetes

29 October 2014

The Indonesian government has taken a number of important steps to tackle illegal logging and the associated trade but  implementation and enforcement challenges remain, in particular a poorly functioning decentralized governance system, persistent corruption and insufficient transparency of information.

15 November 2016

Convocamos un seminario en línea (webinar) en español en la ocasión del lanzamiento del informe, Creatividad dentro de la crisis: opciones legales para inmigrantes venezolanos en América Latina, que describe donde se han radicado los migrantes venezolanos; las medidas que han utilizado los gobiernos latinoamericanos para regularizar el estatus legal de los migrantes venezolanos; y los esfuerzos por integrar a los recién llegados en sus nuevas comunidades de residencia.

Indonesia, which has a long history as a major origin for migrant labor in the Asia-Pacific and beyond, more recently has reluctantly found itself a transit and destination country, including for asylum seekers. Still, policymakers remain focused on protection of its nationals abroad rather than on assuring the status of Chinese and other foreigners in the country. This country profile explores Indonesia's rich migration history. 

Israel's Ministry of Defense ordered small drones for its ground forces working in urban areas, maker Rafael Advanced Defense Systems Ltd. said Monday.

Presentación del reporte que refleja el contenido de encuentros del grupo de estudio sobre la migración México-Estados Unidos convocado por El Colegio de México y el Migration Policy Institute (MPI).

Dado el incremento de los flujos migratorios provenientes de Centroamérica, el pasado mes de junio de 2019, los Estados Unidos y México acordaron tomar una serie de medidas para reducir los flujos irregulares. Sin embargo, será muy difícil mantener estos esfuerzos de corto plazo, debido a una debilidad institucional crónica y a estructuras de política pública poco planificadas en ambos países. Este comentario ofrece cinco recomendaciones a ambos países considerando soluciones de mediano y largo plazo para disuadir la migración irregular y, al mismo tiempo, garantizar que aquellos que busquen protección tengan un proceso justo.

The Connecticut Foundation for Dental Outreach has postponed the Connecticut Mission of Mercy Free Dental Clinic scheduled for March 20-21 in Danbury, Connecticut, "out of abundant caution" amid the coronavirus disease outbreak.

The American Dental Association and Florida Dental Association have postponed registration for the ADA FDC Annual Meeting from April 22 to early summer, in light of the COVID-19 pandemic.

Over the last 40 years, climate change has been influencing where tropical cyclones form, according to a new study.

When it came to selecting bones for leather-making tools, Neanderthals were surprisingly choosy. New archaeological analysis shows Neanderthals preferentially selected bovine rib bones to make a tool called a lissoir.

Poland announced a delay of its Sunday presidential election, Europe's first planned vote during the coronavirus pandemic.

I am torn, I know it is time to upgrade my phone, but I don't know whether to upgrade to just accept the larger phone size and go with the 2nd gen SE or go with an android. I'd be interested to know what the closest equivalent android device there is to the 1st gen SE. I am open to a bigger screen size, but not a bigger phone. So, if there was an andriod that was all screen on the front, but was similar size to the original SE, I would be open to that.

Painted images of intriguing human-animal hybrids are signs of modern thought

-- Read more on ScientificAmerican.com

La migración entre México y Estados Unidos ha cambiado dramáticamente en los últimos años, pero las políticas y la retórica política en ambos países no se han actualizado a este contexto a la misma velocidad. Este reporte explora esta nueva realidad migratoria y cómo los dos gobiernos podrían trabajar juntos para abordar los desafíos de políticas públicas que tienen en común.

I have clear memories of being about four year's old standing on a little stool next to my mum while she made batches of these golden scones. I always loved being in the kitchen with her and she was endlessly patient, letting me help mix, stir, roll and shape all manner of things (in this case turning a blind eye when I smuggled little nuggets raw dough and dates into my mouth.) We would chat away as we went and she would explain to me what she was doing. I remember to this day her telling me the secret to making good scones was to use the lightest touch possible when you're mixing the dough together...we had no food processor then so everything was mixed by hand and I loved rubbing the flour and butter together, lifting my hands high as she had taught me to help keep the scones light. Although I whiz these up in a processor now, every so often I make a batch by hand, and am immediately whisked back into that childhood kitchen and can almost feel and see Cooee, my mum, beside me in her wonderful cinch-waisted 60's polka dot dress...it's a wonderful image.

The ocean is a naturally noisy place full of singing whales, grunting fish, snapping shrimp, cracking ice, wind and rain. But human-made sounds -- from ship engines to oil drilling -- have become an acute threat to marine life, says science journalist Nicola Jones. Watch (and listen) as she discusses the strange things that happen to underwater creatures in the face of ocean noise pollution -- and shares straightforward ways we can dial down the sound to see almost immediate impacts.

How comfortable are you with robots taking over your life? Covering a wide range of potential applications -- from the mundane (robot house cleaner) to the mischievous (robot sex partner) to the downright macabre (uploading your brain to live on after death) -- technology strategist Lucy Farey-Jones shares data-backed evidence of how our willingness to accept AI may be radically changing.

New Jersey is one of many states that have experienced problems with the online administering of standardized testing this year.

Australian fiction.

McMillan, Peter -- Travel.