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Applications Being Accepted for 42nd Summer Seminar on Population

Applications Being Accepted for 42nd Summer Seminar on Population
Trio of independent workshops will focus on designing fertility analysis,
effective responses to HIV and communicating with policymakers

HONOLULU (Nov. 4, 2010) – Applications are being accepted through December 31 for the East-West Center’s 2011 Summer Seminar on Population. Held annually since 1970, the Summer Seminar provides a forum for learning and discussion on a wide range of population and health issues. Former participants work in government, nongovernmental (NGO), and academic institutions throughout the Asia-Pacific region and around the world.

Click here for full information on the Summer Seminar workshops, instructions for applicants, and application forms from the Summer Seminar website.




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Applications Being Accepted for Summer Population Seminar

Applications Being Accepted for Summer Population Seminar

Trio of independent workshops will focus on population aging, health-care financing and communicating with policymakers

HONOLULU (Dec. 1) – Applications are being accepted through December 31 for the East-West Center’s 2010 Summer Seminar on Population. Held annually since 1970, the Summer Seminar provides a forum for learning and discussion on a wide range of population and health issues. Former participants work in government, nongovernmental (NGO), and academic institutions throughout the Asia-Pacific region and around the world.

Full information on the Summer Seminar workshops, instructions for applicants, and application forms can be obtained from the Summer Seminar website at http://www.eastwestcenter.org/summerseminar .




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Defence Order No. 6 stipulating labour rights in Jordan

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HIV/AIDS in Asia: We Need to Keep the Focus on Key Population Groups

By Tim Brown and Wiwat Peerapatanapokin HONOLULU (September 17, 2019)—In 2018, roughly 6 million people were living with HIV in Asia and the Pacific, and 310,000 were newly infected, according to UNAIDS estimates. Despite these troubling numbers, financial support for the fight against AIDS is stagnant, and international resources for HIV programs in the region are declining. Given the continued HIV infection levels and limited funds for halting the epidemic, it is more important than ever for prevention efforts to achieve maximum impact with the resources available. This means that programs need to target the key populations most at risk of contracting HIV. In Asia, these key populations are female sex workers and their clients, people who inject drugs, and men who have sex with men....

This is a summary only. Click the title for the full article, or visit www.EastWestCenter.org/Research-Wire for more.




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Can Technology Offset the Effects of Population Aging on Economic Growth? New Report from the Asian Development Bank

By East-West Center HONOLULU (March 27, 2020)—Population aging is affecting countries all across Asia. This ongoing demographic transition will leave many of the region’s economies increasingly dependent on an aging, and eventually a shrinking, workforce. Economists disagree, however, on whether population aging will necessarily lead to a slowdown in economic growth.

This is a summary only. Click the title for the full article, or visit www.EastWestCenter.org/Research-Wire for more.




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An Aging Population in Asia Creates Economic Challenges

By Andrew Mason, Sang-Hyop Lee, and Donghyun Park HONOLULU (8 May 2020)—Elderly populations in Asia are expanding more quickly than other age groups. Low fertility rates result in fewer children and eventually fewer working-age adults, while elderly populations are living longer.

This is a summary only. Click the title for the full article, or visit www.EastWestCenter.org/Research-Wire for more.





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Coronavirus: Indian manager of popular Chennai biotech firm consumes drug he invented to cure COVID-19, dies

Dubai: A 47-year-old pharmacist in the Indian state of Tamil Nadu, died on Thursday after consuming a “new cure” he had made for COVID-19. Indian tweeps shared reports of how the man, K. Sivanesan, made and drank the chemical concoction along with the owner of a popular Chennai-based herbal pharmaceutical company where he worked. According to a report by Indian newspaper, The Indian Express, the owner of Sujatha Bio Tech, along with his employee, tried to create a coronavirus cure, but consumed a...




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Coronavirus: Milan mayor hits out at crowds descending on popular streets as lockdown lifts

Milan's mayor has condemned "shameful" crowds heading to a popular area of the city during Italy’s relaxed lockdown. Images...




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Most popular Turkish pilot on social media changes job

Ebru Ünsal, who has been described as the most popular Turkish pilot on social media, has switched jobs. Click through for the story in photos...




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Thousands have already booked their seats for popular Eastern Express

With the winter approaching, the demand for seats on the Eastern Express, a train service that links the capital Ankara with the eastern province of Kars, has surged again, as the number of tickets sold so far for the winter months reached 10,000. Click through for the story in photos...




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Why Maltese-licensed casinos are so popular overseas

In many markets, the MGA license is most respected by players and many new regulatory frameworks are modelled after it




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Can Believers Manipulate the Power and Presence of Christ?

In the lead-up to the Truth Matters conference in October, we will be focusing our attention on the sufficiency, authority, and clarity of Scripture. Of our previous blog series, none better embodies that emphasis than Frequently Abused Verses. The following entry from that series originally appeared on October 2, 2015. -ed.

Truly I say to you, whatever you bind on earth shall have been bound in heaven; and whatever you loose on earth shall have been loosed in heaven. Again I say to you, that if two of you agree on earth about anything that they may ask, it shall be done for them by My Father who is in heaven. For where two or three have gathered together in My name, I am there in their midst. (Matthew 18:18–20)

How often have you heard that passage (or at least part of it) quoted in a church setting?

During my time in the charismatic church, Matthew 18:18–20 was quoted in every prayer meeting and regularly from the pulpit. In fact, I cannot think of any other Scripture passage I heard quoted so frequently without ever hearing a sermon on the passage itself. And yet we would regularly bind demonic forces on earth and loose angelic armies from heaven. And we always reminded ourselves that Jesus was there because at least two or three of us were present.

Our church was far from alone in its dependence on Matthew 18:18–20. In fact, the passage is a favorite of self-appointed experts in spiritual warfare and those who put special emphasis on Christ’s presence. The passage has been chopped up and subdivided all sorts of ways in service to a number of doctrinal positions and practical applications.

For example, notorious faith healer and prosperity preacher Benny Hinn emphasizes Matthew 18:18 as a promise of supernatural power and heavenly authority:

Do you realize that movements on earth govern movements in heaven? Do you realize that a child of God in prayer affects decisions in heaven? The Lord declared: “Whatsoever ye shall bind on earth shall be bound in heaven; and whatsoever ye shall loose on earth shall be loosed in heaven (Matthew 18:18). So awesome is this power that it releases angels to do God’s bidding on the earth and binds demons as it destroys the purpose of the enemy! [1]Benny Hinn, https://www.bennyhinn.org/tiyd-video/prayer-that-gets-results-part-1/

Contrast that with the conclusions of Rick Warren, who offers a far less spectacular interpretation and application of the passage, while employing similar hermeneutical technique in his assessment of verses 19–20:

Many people miss out on so much because they only pray by themselves. Yet, when Jesus gave us an outline for prayer, he spoke about praying together. There is power in group prayer. If you’re not praying with other believers, then you’re not getting the support you need. You’re missing out on one of the major benefits of being a Christian. Jesus says “whenever two of you on earth agree about anything you pray for, it will be done for you by my Father in heaven. For where two or three come together in my name, I am there with them” (Matthew 18:19-20 TEV). That’s the power of praying with other people. [2]Rick Warren, http://rickwarren.org/devotional/english/a-powerful-key-to-prayer_700

Joyce Meyer comes out of the same Word Faith stream as Benny Hinn and also enjoys a huge television following. But her ministry prefers to traffic in practical advice for day-to-day life. She actually deploys Matthew 18:20 in the realm of marriage counsel:

The Bible says that there is power in agreement. . . .

If you want to have power in your marriage and in your prayer life, then you have to get along. The big question is: How can a disagreeing couple learn to agree? Agreement comes when the people involved stop being selfish. Selfishness is an immature inward focus. The key is to care about what the other person needs, be willing to humble yourself, and do what you can to meet those needs.

When this happens, you can live together in agreement before the Lord, and “wherever two or three are gathered” in His name, God is there with them. So make a choice with your spouse today to pursue agreement and unity before the Lord. [3]Joyce Meyer, https://www.bible.com/reading-plans/199-promises-for-your-everyday-life/day/360

How can one passage support such disparate meanings? Are any of those interpretations the true meaning of Matthew 18:18–20? Do they skirt around the edges of the author’s original intent, or are they missing the point of the passage altogether? Bottom line: Does this passage have anything to do with spiritual warfare, group prayer, or marital unity?

As with previous posts in this series, the first thing we should check is the context of our passage. What do the surrounding verses tell us about the meaning of our text? In this case, the preceding verses are likely just as familiar as the passage in question:

If your brother sins, go and show him his fault in private; if he listens to you, you have won your brother. But if he does not listen to you, take one or two more with you, so that by the mouth of two or three witnesses every fact may be confirmed. If he refuses to listen to them, tell it to the church; and if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector. (Matthew 18:15–17)

Just a simple reading of the text makes it clear that the focus is not spiritual warfare, unity in marriage, or empowering your prayer meetings. Instead, verses 15–17 speak exclusively about church discipline.

Therefore, all of Christ’s instructions about binding and loosing, unity, and the promise of His presence come in the context of church discipline. In other words, Matthew 18:18–20 means that when church leaders gather together to deal with unrepentant sinners, they have heavenly backing.

In his commentary on this passage, John MacArthur explains how many of the popular interpretations go wrong when they divorce the verses from their context:

Jesus’ promises in verses 18 and 19 have suffered serious misinterpretation throughout the history of the church. . . . Many charismatics use these promises—along with others, such as those of Matthew 7:7 and 21:22—to claim from God every imaginable blessing and privilege just for the asking.

But in light of the context of what Jesus had just said, in the light of common rabbinical expressions of that day, and in light of the grammatical construction of the text, it is clear that He was not teaching that God’s power can be bent to men’s will. He was not saying that men can force heaven to do things. Quite to the contrary, His promise was that when His people bend their wills to His, He will endorse and empower their act of obedience.

Jesus was here continuing His instruction about church discipline. He was not speaking about petitioning God for special blessings or privileges, and even less was He teaching that the church or any of its leaders has power to absolve the sins of its members. He was declaring that the church has a divine mandate to discipline its members when they refuse to repent. [4]John MacArthur, The MacArthur New Testament Commentary: Matthew 16–23 (Chicago: Moody Publishers, 1988) 137.

And what about the power to bind and loose in the spiritual realm? John also carefully debunks that misinterpretation:

The rabbis sometimes spoke of a principle or action as being bound in heaven or loosed in heaven to indicate, respectively, that it was forbidden or permitted in light of God’s revealed Word. . . . Believers have authority to declare that sins are either forgiven or not forgiven when that declaration is based on the teaching of God’s Word. If a person has received Jesus Christ as Savior and Lord, the church can tell him with perfect confidence that his sins are loosed, that is, forgiven, because he has met God’s condition for forgiveness, namely, trust in His Son. If, on the other hand, a person refuses to receive Christ as Savior and acknowledge Him as Lord, the church can tell him with equal confidence that his sins are bound, that is, not forgiven, because he has not met God’s condition for forgiveness. [5] The MacArthur New Testament Commentary: Matthew 16–23, 137.

Matthew 18:15–17 is Christ’s explanation of how church discipline is to be practiced. Verses 18–20 expand on His instructions by informing us of the immense heavenly support provided to leaders who maintain the discipline of the church. Here’s how John MacArthur describes it:

Jesus also assures His people that He Himself acts with them when they work to purify the church: “For where two or three have gathered together in My name, there I am in their midst.” Not only does the Father confirm discipline when it is administered according to His Word, but the Son adds His own divine confirmation. . . . To use this statement to claim the Lord’s presence at a small worship service or prayer meeting does not fit the context of church discipline and is superfluous. Christ is always present with His people, even with a lone believer totally separated from fellow Christians by prison walls or by hundreds of miles.

The context demands that the two or three are witnesses in the process of discipline. To ask or to do anything in God’s name is not to utter His name but to ask and to work according to His divine will and character. For the witnesses to have gathered in His name is therefore for them to have faithfully performed their work of verifying the repentance or impenitence of a sinning brother or sister on the Lord’s behalf. When the church gathers in the Lord’s name and for His cause and glory, it must be engaged in self-purifying ministry under His power and authority, and with His heavenly confirmation and partnership. [6] The MacArthur New Testament Commentary: Matthew 16–23, 138.

One could make a case that the church’s silence on the issue of biblical discipline (Matthew 18:15-17) has allowed for a cacophony of misinterpretations and misapplications of Matthew 18:18-20. Ripped from their original setting and intent, those verses have been made to serve a variety of false positions and pretexts.

Our interpretation of Scripture has serious practical repercussions. We would all do well to receive Paul’s counsel to Timothy:  “Be diligent to present yourself approved to God as a workman who does not need to be ashamed, accurately handling the word of truth” (2 Timothy 2:15).




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British population in Czech Republic growing faster since Brexit referendum

Prague Daily Monitor

According to data released by the Ministry of Interior, the number of British citizens living in the Czech Republic has increased about 35% since the Brexit referendum, and Brits with their permanent residence in the Czech Republic have risen almost 55% since 2016.

read more




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ANO continues to be the most popular party, two January polls show

Prague Daily Monitor

Whether PM Andrej Babis (ANO) was attacked by the Million Moments demonstrations, accused by the European Commission of a conflict of interest in wrongfully taking European subsidies after an audit was completed, or the December investigation reopening concerning a construction project, his party continues to lead by a huge margin in polls.

read more




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Global Impact of New Corona Virus and Population Issues

The new coronavirus (COVID-19) continues to wreak havoc across the world, as the number of infections and deaths rapidly rise. It has the potential to infect anybody regardless of age or gender. There are grave concerns that the economic fallout from COVID-19 may be comparable to that of the Great Depression. According to Johns Hopkins […]

The post Global Impact of New Corona Virus and Population Issues appeared first on Inter Press Service.




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Jobs first: Bolsonaro fires popular health expert

Few global leaders have done more than Bolsonaro to play down the pandemic, which has killed nearly 2000 Brazilians.




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Ayushmann Khurrana recalls manipulative offers made by directors during his initial days

Ayushmann Khurrana is riding high in his career right now but the road to success was no bed of roses for him




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Five myths about population, aging and environmental sustainability -- by Jane O'Sullivan, Francesco Ricciardi, Susann Roth

For sustainable development, universal wellbeing should be the goal, rather than endless growth. Minimizing further growth in human populations is only part of the solution, but an essential part. 




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Charting Sri Lanka's aging population -- by Utsav Kumar

These charts illustrate how Sri Lanka’s elderly population is increasing while the number of working-age people to help support them is declining. Forward-thinking policies are needed to address the challenges arising from this imbalance.




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How to protect Asia’s rapidly aging population from COVID-19 -- by Meredith Wyse

The COVID-19 pandemic highlights the need to strengthen programs and policies affecting older persons both in times of crisis and afterward.




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Releasing rescued orangutans into the wild doesn’t boost populations

Orangutan orphanages nurse animals back to health and release them into the wild, but that doesn’t seem to increase the population of these endangered apes




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How to make noodles: the art and science of manipulating gluten

It's easy and fun to make hand-pulled noodles, especially if you understand how gluten is acting inside the dough to make it stretch y and elastic, says Sam Wong




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Leisurely Strolls More Popular, Yet Walk Times Shorter: CDC

Title: Leisurely Strolls More Popular, Yet Walk Times Shorter: CDC
Category: Health News
Created: 4/27/2012 2:06:00 PM
Last Editorial Review: 4/30/2012 12:00:00 AM




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'Breast Milk Banks' Gain in Popularity

Title: 'Breast Milk Banks' Gain in Popularity
Category: Health News
Created: 4/29/2014 9:35:00 AM
Last Editorial Review: 4/29/2014 12:00:00 AM




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Genetic Manipulation of Human Intestinal Enteroids Demonstrates the Necessity of a Functional Fucosyltransferase 2 Gene for Secretor-Dependent Human Norovirus Infection

ABSTRACT

Human noroviruses (HuNoVs) are the leading cause of nonbacterial gastroenteritis worldwide. Histo-blood group antigen (HBGA) expression is an important susceptibility factor for HuNoV infection based on controlled human infection models and epidemiologic studies that show an association of secretor status with infection caused by several genotypes. The fucosyltransferase 2 gene (FUT2) affects HBGA expression in intestinal epithelial cells; secretors express a functional FUT2 enzyme, while nonsecretors lack this enzyme and are highly resistant to infection and gastroenteritis caused by many HuNoV strains. These epidemiologic associations are confirmed by infections in stem cell-derived human intestinal enteroid (HIE) cultures. GII.4 HuNoV does not replicate in HIE cultures derived from nonsecretor individuals, while HIEs from secretors are permissive to infection. However, whether FUT2 expression alone is critical for infection remains unproven, since routinely used secretor-positive transformed cell lines are resistant to HuNoV replication. To evaluate the role of FUT2 in HuNoV replication, we used CRISPR or overexpression to genetically manipulate FUT2 gene function to produce isogenic HIE lines with or without FUT2 expression. We show that FUT2 expression alone affects both HuNoV binding to the HIE cell surface and susceptibility to HuNoV infection. These findings indicate that initial binding to a molecule(s) glycosylated by FUT2 is critical for HuNoV infection and that the HuNoV receptor is present in nonsecretor HIEs. In addition to HuNoV studies, these isogenic HIE lines will be useful tools to study other enteric microbes where infection and/or disease outcome is associated with secretor status.

IMPORTANCE Several studies have demonstrated that secretor status is associated with susceptibility to human norovirus (HuNoV) infection; however, previous reports found that FUT2 expression is not sufficient to allow infection with HuNoV in a variety of continuous laboratory cell lines. Which cellular factor(s) regulates susceptibility to HuNoV infection remains unknown. We used genetic manipulation of HIE cultures to show that secretor status determined by FUT2 gene expression is necessary and sufficient to support HuNoV replication based on analyses of isogenic lines that lack or express FUT2. Fucosylation of HBGAs is critical for initial binding and for modification of another putative receptor(s) in HIEs needed for virus uptake or uncoating and necessary for successful infection by GI.1 and several GII HuNoV strains.




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Tracing the Evolutionary History and Global Expansion of Candida auris Using Population Genomic Analyses

ABSTRACT

Candida auris has emerged globally as a multidrug-resistant yeast that can spread via nosocomial transmission. An initial phylogenetic study of isolates from Japan, India, Pakistan, South Africa, and Venezuela revealed four populations (clades I, II, III, and IV) corresponding to these geographic regions. Since this description, C. auris has been reported in more than 30 additional countries. To trace this global emergence, we compared the genomes of 304 C. auris isolates from 19 countries on six continents. We found that four predominant clades persist across wide geographic locations. We observed phylogeographic mixing in most clades; clade IV, with isolates mainly from South America, demonstrated the strongest phylogeographic substructure. C. auris isolates from two clades with opposite mating types were detected contemporaneously in a single health care facility in Kenya. We estimated a Bayesian molecular clock phylogeny and dated the origin of each clade within the last 360 years; outbreak-causing clusters from clades I, III, and IV originated 36 to 38 years ago. We observed high rates of antifungal resistance in clade I, including four isolates resistant to all three major classes of antifungals. Mutations that contribute to resistance varied between the clades, with Y132F in ERG11 as the most widespread mutation associated with azole resistance and S639P in FKS1 for echinocandin resistance. Copy number variants in ERG11 predominantly appeared in clade III and were associated with fluconazole resistance. These results provide a global context for the phylogeography, population structure, and mechanisms associated with antifungal resistance in C. auris.

IMPORTANCE In less than a decade, C. auris has emerged in health care settings worldwide; this species is capable of colonizing skin and causing outbreaks of invasive candidiasis. In contrast to other Candida species, C. auris is unique in its ability to spread via nosocomial transmission and its high rates of drug resistance. As part of the public health response, whole-genome sequencing has played a major role in characterizing transmission dynamics and detecting new C. auris introductions. Through a global collaboration, we assessed genome evolution of isolates of C. auris from 19 countries. Here, we described estimated timing of the expansion of each C. auris clade and of fluconazole resistance, characterized discrete phylogeographic population structure of each clade, and compared genome data to sensitivity measurements to describe how antifungal resistance mechanisms vary across the population. These efforts are critical for a sustained, robust public health response that effectively utilizes molecular epidemiology.




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Killer Archaea: Virus-Mediated Antagonism to CRISPR-Immune Populations Results in Emergent Virus-Host Mutualism

ABSTRACT

Theory, simulation, and experimental evolution demonstrate that diversified CRISPR-Cas immunity to lytic viruses can lead to stochastic virus extinction due to a limited number of susceptible hosts available to each potential new protospacer escape mutation. Under such conditions, theory predicts that to evade extinction, viruses evolve toward decreased virulence and promote vertical transmission and persistence in infected hosts. To better understand the evolution of host-virus interactions in microbial populations with active CRISPR-Cas immunity, we studied the interaction between CRISPR-immune Sulfolobus islandicus cells and immune-deficient strains that are infected by the chronic virus SSV9. We demonstrate that Sulfolobus islandicus cells infected with SSV9, and with other related SSVs, kill uninfected, immune strains through an antagonistic mechanism that is a protein and is independent of infectious virus. Cells that are infected with SSV9 are protected from killing and persist in the population. We hypothesize that this infection acts as a form of mutualism between the host and the virus by removing competitors in the population and ensuring continued vertical transmission of the virus within populations with diversified CRISPR-Cas immunity.

IMPORTANCE Multiple studies, especially those focusing on the role of lytic viruses in key model systems, have shown the importance of viruses in shaping microbial populations. However, it has become increasingly clear that viruses with a long host-virus interaction, such as those with a chronic lifestyle, can be important drivers of evolution and have large impacts on host ecology. In this work, we describe one such interaction with the acidic crenarchaeon Sulfolobus islandicus and its chronic virus Sulfolobus spindle-shaped virus 9. Our work expands the view in which this symbiosis between host and virus evolved, describing a killing phenotype which we hypothesize has evolved in part due to the high prevalence and diversity of CRISPR-Cas immunity seen in natural populations. We explore the implications of this phenotype in population dynamics and host ecology, as well as the implications of mutualism between this virus-host pair.




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Polygenic risk scores of several subtypes of epilepsies in a founder population

Objective

Polygenic risk scores (PRSs) are used to quantify the cumulative effects of a number of genetic variants, which may individually have a very small effect on susceptibility to a disease; we used PRSs to better understand the genetic contribution to common epilepsy and its subtypes.

Methods

We first replicated previous single associations using 373 unrelated patients. We then calculated PRSs in the same French Canadian patients with epilepsy divided into 7 epilepsy subtypes and population-based controls. We fitted a logistic mixed model to calculate the variance explained by the PRS using pseudo-R2 statistics.

Results

We show that the PRS explains more of the variance in idiopathic generalized epilepsy than in patients with nonacquired focal epilepsy. We also demonstrate that the variance explained is different within each epilepsy subtype.

Conclusions

Globally, we support the notion that PRSs provide a reliable measure to rightfully estimate the contribution of genetic factors to the pathophysiologic mechanism of epilepsies, but further studies are needed on PRSs before they can be used clinically.




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Space is the Place: Effects of Continuous Spatial Structure on Analysis of Population Genetic Data [Population and Evolutionary Genetics]

Real geography is continuous, but standard models in population genetics are based on discrete, well-mixed populations. As a result, many methods of analyzing genetic data assume that samples are a random draw from a well-mixed population, but are applied to clustered samples from populations that are structured clinally over space. Here, we use simulations of populations living in continuous geography to study the impacts of dispersal and sampling strategy on population genetic summary statistics, demographic inference, and genome-wide association studies (GWAS). We find that most common summary statistics have distributions that differ substantially from those seen in well-mixed populations, especially when Wright’s neighborhood size is < 100 and sampling is spatially clustered. "Stepping-stone" models reproduce some of these effects, but discretizing the landscape introduces artifacts that in some cases are exacerbated at higher resolutions. The combination of low dispersal and clustered sampling causes demographic inference from the site frequency spectrum to infer more turbulent demographic histories, but averaged results across multiple simulations revealed surprisingly little systematic bias. We also show that the combination of spatially autocorrelated environments and limited dispersal causes GWAS to identify spurious signals of genetic association with purely environmentally determined phenotypes, and that this bias is only partially corrected by regressing out principal components of ancestry. Last, we discuss the relevance of our simulation results for inference from genetic variation in real organisms.




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Toward an Evolutionarily Appropriate Null Model: Jointly Inferring Demography and Purifying Selection [Population and Evolutionary Genetics]

The question of the relative evolutionary roles of adaptive and nonadaptive processes has been a central debate in population genetics for nearly a century. While advances have been made in the theoretical development of the underlying models, and statistical methods for estimating their parameters from large-scale genomic data, a framework for an appropriate null model remains elusive. A model incorporating evolutionary processes known to be in constant operation, genetic drift (as modulated by the demographic history of the population) and purifying selection, is lacking. Without such a null model, the role of adaptive processes in shaping within- and between-population variation may not be accurately assessed. Here, we investigate how population size changes and the strength of purifying selection affect patterns of variation at "neutral" sites near functional genomic components. We propose a novel statistical framework for jointly inferring the contribution of the relevant selective and demographic parameters. By means of extensive performance analyses, we quantify the utility of the approach, identify the most important statistics for parameter estimation, and compare the results with existing methods. Finally, we reanalyze genome-wide population-level data from a Zambian population of Drosophila melanogaster, and find that it has experienced a much slower rate of population growth than was inferred when the effects of purifying selection were neglected. Our approach represents an appropriate null model, against which the effects of positive selection can be assessed.




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Identifying and Classifying Shared Selective Sweeps from Multilocus Data [Population and Evolutionary Genetics]

Positive selection causes beneficial alleles to rise to high frequency, resulting in a selective sweep of the diversity surrounding the selected sites. Accordingly, the signature of a selective sweep in an ancestral population may still remain in its descendants. Identifying signatures of selection in the ancestor that are shared among its descendants is important to contextualize the timing of a sweep, but few methods exist for this purpose. We introduce the statistic SS-H12, which can identify genomic regions under shared positive selection across populations and is based on the theory of the expected haplotype homozygosity statistic H12, which detects recent hard and soft sweeps from the presence of high-frequency haplotypes. SS-H12 is distinct from comparable statistics because it requires a minimum of only two populations, and properly identifies and differentiates between independent convergent sweeps and true ancestral sweeps, with high power and robustness to a variety of demographic models. Furthermore, we can apply SS-H12 in conjunction with the ratio of statistics we term and to further classify identified shared sweeps as hard or soft. Finally, we identified both previously reported and novel shared sweep candidates from human whole-genome sequences. Previously reported candidates include the well-characterized ancestral sweeps at LCT and SLC24A5 in Indo-Europeans, as well as GPHN worldwide. Novel candidates include an ancestral sweep at RGS18 in sub-Saharan Africans involved in regulating the platelet response and implicated in sudden cardiac death, and a convergent sweep at C2CD5 between European and East Asian populations that may explain their different insulin responses.




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Phosphoflow Protocol for Signaling Studies in Human and Murine B Cell Subpopulations [NOVEL IMMUNOLOGICAL METHODS]

Key Points

  • Method for highly sensitive detection of phosphorylation in B cell subpopulations.

  • B cell subpopulations show different phosphorylation levels upon BCR stimulation.




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    A minor population of macrophage-tropic HIV-1 variants is identified in recrudescing viremia following analytic treatment interruption [Microbiology]

    HIV-1 persists in cellular reservoirs that can reignite viremia if antiretroviral therapy (ART) is interrupted. Therefore, insight into the nature of those reservoirs may be revealed from the composition of recrudescing viremia following treatment cessation. A minor population of macrophage-tropic (M-tropic) viruses was identified in a library of recombinant viruses...




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    Limits to sustained energy intake. XXX. Constraint or restraint? Manipulations of food supply show peak food intake in lactation is constrained [RESEARCH ARTICLE]

    Zhi-Jun Zhao, Davina Derous, Abby Gerrard, Jing Wen, Xue Liu, Song Tan, Catherine Hambly, and John R. Speakman

    Lactating mice increase food intake 4- to 5-fold, reaching an asymptote in late lactation. A key question is whether this asymptote reflects a physiological constraint, or a maternal investment strategy (a ‘restraint’). We exposed lactating mice to periods of food restriction, hypothesizing that if the limit reflected restraint, they would compensate by breaching the asymptote when refeeding. In contrast, if it was a constraint, they would by definition be unable to increase their intake on refeeding days. Using isotope methods, we found that during food restriction, the females shut down milk production, impacting offspring growth. During refeeding, food intake and milk production rose again, but not significantly above unrestricted controls. These data provide strong evidence that asymptotic intake in lactation reflects a physiological/physical constraint, rather than restraint. Because hypothalamic neuropeptide Y (Npy) was upregulated under both states of restriction, this suggests the constraint is not imposed by limits in the capacity to upregulate hunger signalling (the saturated neural capacity hypothesis). Understanding the genetic basis of the constraint will be a key future goal and will provide us additional information on the nature of the constraining factors on reproductive output, and their potential links to life history strategies.




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    Responses of activity rhythms to temperature cues evolve in Drosophila populations selected for divergent timing of eclosion [RESEARCH ARTICLE]

    Lakshman Abhilash, Arshad Kalliyil, and Vasu Sheeba

    Even though the rhythm in adult emergence and rhythm in locomotor activity are two different rhythmic phenomena that occur at distinct life-stages of the fly life cycle, previous studies have hinted at similarities in certain aspects of the organisation of the circadian clock driving these two rhythms. For instance, the period gene plays an important regulatory role in both rhythms. In an earlier study, we have shown that selection on timing of adult emergence behaviour in populations of Drosophila melanogaster leads to the co-evolution of temperature sensitivity of circadian clocks driving eclosion. In this study, we were interested in asking if temperature sensitivity of the locomotor activity rhythm has evolved in our populations with divergent timing of adult emergence rhythm, with the goal of understanding the extent of similarity (or lack of it) in circadian organisation between the two rhythms. We found that in response to simulated jetlag with temperature cycles, late chronotypes (populations selected for predominant emergence during dusk) indeed re-entrain faster than early chronotypes (populations selected for predominant emergence during dawn) to 6-h phase-delays, thereby indicating enhanced sensitivity of the activity/rest clock to temperature cues in these stocks (entrainment is the synchronisation of internal rhythms to cyclic environmental time-cues). Additionally, we found that late chronotypes show higher plasticity of phases across regimes, day-to-day stability in phases and amplitude of entrainment, all indicative of enhanced temperature sensitive activity/rest rhythms. Our results highlight remarkably similar organisation principles between emergence and activity/rest rhythms.




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    Impact of a Multidisciplinary, Endocrinologist-Led Shared Medical Appointment Model on Diabetes-Related Outcomes in an Underserved Population

    A multidisciplinary endocrinologist-led shared medical appointment (SMA) model showed statistically significant reductions in A1C from baseline over 3 years that were not significantly different from appointments with endocrinologists or primary care providers alone within a resource-poor population. Similarly, the SMA model achieved clinical outcomes on par with endocrinologist-only visits with the added benefit of improving endocrine provider productivity and specialty access for patients. Greater patient engagement with the SMA model was associated with significantly lower A1C.




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    Prevalence and incidence of, and risk factors for chronic cough in the adult population: the Rotterdam Study

    Chronic cough is a common complaint in the general population but there are no precise data on the incidence of, and prospectively examined risk factors for chronic cough in a population-based setting. Therefore, we investigated the period prevalence, incidence and risk factors for chronic cough in adult subjects.

    In a prospective population-based cohort study among subjects aged ≥45 years, data on chronic cough were collected on two separate occasions using a standardised questionnaire. Chronic cough was defined as daily coughing for at least 3 months duration during the preceding 2 years. Potential risk factors were gathered by interview, physical examination and several investigations.

    Of the 9824 participants in this study, 1073 (10.9%) subjects had chronic cough at baseline. The prevalence of chronic cough increased with age and peaked in the eighth decade. In subjects aged <70 years, chronic cough was more common in women. During an average follow-up of 6 years, 439 incident cases of chronic cough occurred with an overall incidence rate of 11.6 per 1000 person-years (95% CI 10.6–12.8). In current smokers, the incidence of chronic cough was higher in men. In the multivariable analysis, current smoking, gastro-oesophageal reflux disease (GORD), asthma and COPD were identified as risk factors for chronic cough.

    Chronic cough is common among adults and highly prevalent in the older population. Current smoking, GORD, asthma and COPD are independent risk factors for chronic cough. Individuals at risk of developing chronic cough may benefit from smoking cessation and control of the underlying disease.




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    Sex Disparities in Cardiovascular Outcome Trials of Populations With Diabetes: A Systematic Review and Meta-analysis

    BACKGROUND

    Sex differences have been described in diabetes cardiovascular outcome trials (CVOTs).

    PURPOSE

    We systematically reviewed for baseline sex differences in cardiovascular (CV) risk factors and CV protection therapy in diabetes CVOTs.

    DATA SOURCES

    Randomized placebo-controlled trials examining the effect of diabetes medications on major adverse cardiovascular events in people ≥18 years of age with type 2 diabetes.

    STUDY SELECTION

    Included trials reported baseline sex-specific CV risks and use of CV protection therapy.

    DATA EXTRACTION

    Two reviewers independently abstracted study data.

    DATA SYNTHESIS

    We included five CVOTs with 46,606 participants. We summarized sex-specific data using mean differences (MDs) and relative risks (RRs) and pooled estimates using random effects meta-analysis. There were fewer women than men in included trials (28.5–35.8% women). Women more often had stroke (RR 1.28; 95% CI 1.09, 1.50), heart failure (RR 1.30; 95% CI 1.21,1.40), and chronic kidney disease (RR 1.33; 95% CI 1.17; 1.51). They less often used statins (RR 0.90; 95% CI 0.86, 0.93), aspirin (RR 0.82; 95% CI 0.71, 0.95), and β-blockers (RR 0.93; 95% CI 0.88, 0.97) and had a higher systolic blood pressure (MD 1.66 mmHg; 95% CI 0.90, 2.41), LDL cholesterol (MD 0.34 mmol/L; 95% CI 0.29, 0.39), and hemoglobin A1c (MD 0.11%; 95% CI 0.09, 0.14 [1.2 mmol/mol; 1.0, 1.5]) than men.

    LIMITATIONS

    We could not carry out subgroup analyses due to the small number of studies. Our study is not generalizable to low CV risk groups nor to patients in routine care.

    CONCLUSIONS

    There were baseline sex disparities in diabetes CVOTs. We suggest efforts to recruit women into trials and promote CV management across the sexes.




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    Underweight Increases the Risk of End-Stage Renal Diseases for Type 2 Diabetes in Korean Population: Data From the National Health Insurance Service Health Checkups 2009-2017

    OBJECTIVE

    There is a controversy over the association between obesity and end-stage renal disease (ESRD) in people with or without type 2 diabetes; therefore, we examined the effect of BMI on the risk of ESRD according to glycemic status in the Korean population.

    RESEARCH DESIGN AND METHODS

    The study monitored 9,969,848 participants who underwent a National Health Insurance Service health checkup in 2009 from baseline to the date of diagnosis of ESRD during a follow-up period of ~8.2 years. Obesity was categorized by World Health Organization recommendations for Asian populations, and glycemic status was categorized into the following five groups: normal, impaired fasting glucose (IFG), newly diagnosed diabetes, diabetes <5 years, and diabetes ≥5 years.

    RESULTS

    Underweight was associated with a higher risk of ESRD in all participants after adjustment for all covariates. In the groups with IFG, newly diagnosed type 2 diabetes, diabetes duration <5 years, and diabetes ≥5 years, the hazard ratio (HR) of the underweight group increased with worsening glycemic status (HR 1.431 for IFG, 2.114 for newly diagnosed diabetes, 4.351 for diabetes <5 years, and 6.397 for diabetes ≥5 years), using normal weight with normal fasting glucose as a reference. The adjusted HRs for ESRD were also the highest in the sustained underweight group regardless of the presence of type 2 diabetes (HR 1.606 for nondiabetes and 2.14 for diabetes).

    CONCLUSIONS

    Underweight showed more increased HR of ESRD according to glycemic status and diabetes duration in the Korean population. These associations also persisted in the group with sustained BMI during the study period.




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    Association of physician payment model and team-based care with timely access in primary care: a population-based cross-sectional study

    Background:

    It is unclear how patient-reported access to primary care differs by physician payment model and participation in team-based care. We examined the association between timely and after-hours access to primary care and physician payment model and participation in team-based care, and sought to assess how access varied by patient characteristics.

    Methods:

    We conducted a cross-sectional analysis of adult (age ≥ 16 yr) Ontarians who responded to the Ontario Health Care Experience Survey between January 2013 and September 2015, reported having a primary care provider and agreed to have their responses linked to health administrative data. Access measures included the proportion of respondents who reported same-day or next-day access when sick, satisfaction with time to appointment when sick, telephone access and knowledge of an after-hours clinic. We tested the association between practice model and measures of access using logistic regression after stratifying for rurality.

    Results:

    A total of 33 665 respondents met our inclusion criteria. In big cities, respondents in team and nonteam capitation models were less likely to report same-day or next-day access when sick than respondents in enhanced fee-for-service models (team capitation 43%, adjusted odds ratio [OR] 0.88, 95% confidence interval [CI] 0.79–0.98; nonteam capitation 39%, adjusted OR 0.78, 95% CI 0.70–0.87; enhanced fee-for-service 46% [reference]). Respondents in team and nonteam capitation models were more likely than those in enhanced fee-for-service models to report that their provider had an after-hours clinic (team capitation 59%, adjusted OR 2.59, 95% CI 2.39–2.81; nonteam capitation 51%, adjusted OR 1.90, 95% CI 1.76–2.04; enhanced fee-for service 34% [reference]). Patterns were similar for respondents in small towns. There was minimal to no difference by model for satisfaction with time to appointment or telephone access.

    Interpretation:

    In our setting, there was an association between some types of access to primary care and physician payment model and team-based care, but the direction was not consistent. Different measures of timely access are needed to understand health care system performance.




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    Use of the health care system by Ontario First Nations people with diabetes: a population-based study

    Background:

    First Nations people in Ontario have an increased prevalence of diabetes compared to other people in the province. This study examined use of health care services by First Nations people with diabetes and other people with diabetes in Ontario.

    Methods:

    Using linked health administrative databases, we identified all people in Ontario with diabetes as of Apr. 1, 2014. We identified First Nations people using the Indian Register. We looked at outcomes from Apr. 1, 2014, to Mar. 31, 2015. We determined the proportion of people with a regular family physician and their continuity of care with that physician. We also examined visits with specialists for diabetes care, hospital admissions for ambulatory-care–sensitive conditions, and emergency department visits for hypo- or hyperglycemia.

    Results:

    There were 1 380 529 people diagnosed with diabetes in Ontario as of Apr. 1, 2014, of whom 22 952 (1.7%) were First Nations people. First Nations people were less likely to have a regular family physician (85.3% v. 97.7%) and had lower continuity of care with that physician (mean score for continuity of care 74.6 v. 77.7) than other people in Ontario. They were also less likely to see specialists. First Nations people were more likely to be admitted to hospital for ambulatory-care–sensitive conditions (2.4% v. 1.2%) and to have an emergency department visit for hypo- or hyperglycemia (1.5% v. 0.8%). Disparities were particularly marked for those living in First Nations communities.

    Interpretation:

    First Nations people with diabetes in Ontario had poorer access to and use of primary care than other people with diabetes in the province. These findings may help explain continued disparities in the rates of complications related to diabetes.




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    Emergency department use by pregnant women in Ontario: a retrospective population-based cohort study

    Background:

    Peripregnancy emergency department use may be common, but data specific to health care systems like that in Canada are lacking. As prior research was limited to livebirths, omitting pregnancies ending in miscarriage or induced abortion, the current study quantified and characterized emergency department use among women in Ontario with a recognized pregnancy.

    Methods:

    This retrospective population-based cohort study included all recognized pregnancies among Ontario residents aged 10–55 years with an estimated date of conception between Apr. 1, 2002, and Mar. 31, 2017. We defined peripregnancy emergency department use as any emergency department visit during pregnancy or within 42 days after pregnancy. We used modified Poisson regression with a robust error variance to generate relative risks (RRs) and 95% confidence intervals (CIs) for the outcome of any peripregnancy emergency department use in association with maternal age, parity, residential income quintile, location of residence, immigrant status, antenatal care provider and number of comorbidities within 120 days before the clinical start of the pregnancy (expressed as total number of Aggregated Diagnosis Groups [ADGs] obtained with the Johns Hopkins Adjusted Clinical Group System). All RRs, except for number of comorbidities, were further adjusted for number of ADGs.

    Results:

    Peripregnancy emergency department use occurred in 1 075 991 (39.4%) of 2 728 236 recognized pregnancies, including 35.8% of livebirths, 47.3% of stillbirths, 73.7% of miscarriages and 84.8% of threatened abortions. A peripregnancy emergency department visit was more likely among women who were less than 25 years of age (adjusted RR 1.16, 95% CI 1.16–1.17), were nulliparous (adjusted RR 1.13, 95% CI 1.13–1.13), resided in the lowest income quintile area (adjusted RR 1.16, 95% CI 1.15–1.16) or in a rural area (adjusted RR 1.50, 95% CI 1.50–1.51), were Canadian-born (adjusted RR 1.22, 95% CI 1.22–1.23), were not seen by an obstetrician (adjusted RR 1.66, 95% CI 1.54–1.80) or had a greater number of ADGs. Emergency department use peaked in the first trimester and in the first week postpartum. Compared to women residing in urban areas, those residing in rural areas had an odds ratio (OR) of 3.44 (95% CI 3.39–3.49) for 3 or more emergency department visits. Women with 3–4 (OR 1.99, 95% CI 1.97–2.01), 5–6 (OR 3.55, 95% CI 3.49–3.61), or 7 or more (OR 7.59, 95% CI 7.39–7.78) prepregnancy comorbidities were more likely to have 3 or more peripregnancy emergency department visits than were those with 2 or fewer comorbidities.

    Interpretation:

    Peripregnancy emergency department use occurred in nearly 40% of pregnancies, notably in the first trimester and early in the postpartum period. Efforts are needed to streamline rapid access to ambulatory obstetric care during these peak periods, when women are susceptible to miscarriage or a complication after a livebirth.




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    Diabetes-induced eye disease among First Nations people in Ontario: a longitudinal, population-based cohort study

    Background:

    In Canada, First Nations populations experience a higher incidence of diabetes and diabetes-related complications than other people. Given the paucity of information on use of preventive eye examinations and the need for interventional care for severe retinopathy among First Nations people, we carried out a population-based study to compare rates of eye examinations and interventional therapies to treat vision-threatening stages of diabetic retinopathy among First Nations people and other people with diabetes in Ontario.

    Methods:

    In collaboration with the Chiefs of Ontario, we carried out a population-based study to identify cohorts of First Nations people and other people with diabetes in Ontario from 1995/96 to 2014/15. We used linked health administrative databases to evaluate rates of eye examination (2005/06–2014/15) and severe diabetic retinopathy treatment and compared them between the 2 populations, and between First Nations people living in and outside of First Nations communities.

    Results:

    We identified 23 013 First Nations people and 1 364 222 other people diagnosed with diabetes from 1995/96 to 2014/15, of whom 49.8% (95% confidence interval [CI] 48.9%–50.7%) and 53.8% (95% CI 53.7%–54.0%), respectively, received an eye examination in 2014/15. Eye examination rates were similar for First Nations people regardless of whether they lived in or outside a First Nations community. First Nations people developed severe diabetic retinopathy at a faster rate than other people (hazard ratio 1.19, 95% CI 1.02–1.38). The gap between First Nations people and other people in the proportion requiring therapy for severe diabetic retinopathy was especially prominent among younger people. There were no significant differences in rates of diabetic retinopathy treatment in First Nations people stratified by place of residence.

    Interpretation:

    Eye examination rates remain suboptimal among people with diabetes in Ontario and were lower among First Nations people. This is particularly concerning in light of our other findings showing an increased risk of requiring treatment for advanced diabetic retinopathy and the accelerated rate of diabetic retinopathy progression among First Nations people with diabetes.




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    25-Hydroxyvitamin D and Risk of Osteoporotic Fractures: Mendelian Randomization Analysis in 2 Large Population-Based Cohorts

    Abstract
    Background
    Whether low plasma 25-hydroxyvitamin D concentrations cause osteoporotic fractures is unclear. We tested the hypothesis that low plasma 25-hydroxyvitamin D concentrations are associated with increased risk of osteoporotic fractures using a Mendelian randomization analysis.
    Methods
    We genotyped 116 335 randomly chosen white Danish persons aged 20–100 years in 2 population-based cohort studies for plasma 25-hydroxyvitamin D decreasing genotypes in CYP2R1 (rs117913124 and rs12794714), DHCR7 (rs7944926 and rs11234027), GEMIN2 (rs2277458), and HAL (rs3819817); 35 833 had information on plasma 25-hydroxyvitamin D. We assessed risk of total, osteoporotic, and anatomically localized fractures from 1981 through 2017. Information on fractures and vital status was obtained from nationwide registries.
    Results
    During up to 36 years of follow-up, we observed 17 820 total fractures, 10 861 osteoporotic fractures, and 3472 fractures of hip or femur. Compared with individuals with 25-hydroxyvitamin D ≥ 50nmol/L, multivariable adjusted hazard ratios (95% CIs) for total fractures were 1.03 (0.97–1.09) for individuals with 25–49.9 nmol/L, 1.19 (1.10–1.28) for individuals with 12.5–24.9 nmol/L, and 1.39 (1.21–1.60) for individuals with 25-hydroxyvitamin D < 12.5 nmol/L. Corresponding hazard ratios were 1.07 (1.00–1.15), 1.25 (1.13–1.37), and 1.49 (1.25–1.77) for osteoporotic fractures and 1.09 (0.98–1.22), 1.37 (1.18–1.57), and 1.41 (1.09–1.81) for fractures of hip or femur, respectively. Hazard ratios per 1 increase in vitamin D allele score, corresponding to 3.0% (approximately 1.6 nmol/L) lower 25-hydroxyvitamin D concentrations, were 0.99 (0.98–1.00) for total fractures, 0.99 (0.97–1.00) for osteoporotic fractures, and 0.98 (0.95–1.00) for fractures of hip or femur.
    Conclusions
    Low plasma 25-hydroxyvitamin D concentrations were associated with osteoporotic fractures; however, Mendelian randomization analysis provided no evidence supporting a causal role for vitamin D in the risk for osteoporotic fractures.




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    Analytical Performance Specifications for Lipoprotein(a), Apolipoprotein B-100, and Apolipoprotein A-I Using the Biological Variation Model in the EuBIVAS Population

    Abstract
    Background
    With increased interest in lipoprotein(a) (Lp[a]) concentration as a target for risk reduction and growing clinical evidence of its impact on cardiovascular disease (CVD) risk, rigorous analytical performance specifications (APS) and accuracy targets for Lp(a) are required. We investigated the biological variation (BV) of Lp(a), and 2 other major biomarkers of CVD, apolipoprotein A-I (apoA-I) and apolipoprotein B-100 (apoB), in the European Biological Variation Study population.
    Method
    Serum samples were drawn from 91 healthy individuals for 10 consecutive weeks at 6 European laboratories and analyzed in duplicate on a Roche Cobas 8000 c702. Outlier, homogeneity, and trend analysis were performed, followed by CV-ANOVA to determine BV estimates and their 95% CIs. These estimates were used to calculate APS and reference change values. For Lp(a), BV estimates were determined on normalized concentration quintiles.
    Results
    Within-subject BV estimates were significantly different between sexes for Lp(a) and between women aged <50 and >50 years for apoA-I and apoB. Lp(a) APS was constant across concentration quintiles and, overall, lower than APS based on currently published data, whereas results were similar for apoA-I and apoB.
    Conclusion
    Using a fully Biological Variation Data Critical Appraisal Checklist (BIVAC)–compliant protocol, our study data confirm BV estimates of Lp(a) listed in the European Federation of Clinical Chemistry and Laboratory Medicine database and reinforce concerns expressed in recent articles regarding the suitability of older APS recommendations for Lp(a) measurements. Given the heterogeneity of Lp(a), more BIVAC-compliant studies on large numbers of individuals of different ethnic groups would be desirable.




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    An Individual Participant Data Population Pharmacokinetic Meta-analysis of Drug-Drug Interactions between Lumefantrine and Commonly Used Antiretroviral Treatment [Clinical Therapeutics]

    Treating malaria in HIV-coinfected individuals should consider potential drug-drug interactions. Artemether-lumefantrine is the most widely recommended treatment for uncomplicated malaria globally. Lumefantrine is metabolized by CYP3A4, an enzyme that commonly used antiretrovirals often induce or inhibit. A population pharmacokinetic meta-analysis was conducted using individual participant data from 10 studies with 6,100 lumefantrine concentrations from 793 nonpregnant adult participants (41% HIV-malaria-coinfected, 36% malaria-infected, 20% HIV-infected, and 3% healthy volunteers). Lumefantrine exposure increased 3.4-fold with coadministration of lopinavir-ritonavir-based antiretroviral therapy (ART), while it decreased by 47% with efavirenz-based ART and by 59% in the patients with rifampin-based antituberculosis treatment. Nevirapine- or dolutegravir-based ART and malaria or HIV infection were not associated with significant effects. Monte Carlo simulations showed that those on concomitant efavirenz or rifampin have 49% and 80% probability of day 7 concentrations <200 ng/ml, respectively, a threshold associated with an increased risk of treatment failure. The risk of achieving subtherapeutic concentrations increases with larger body weight. An extended 5-day and 6-day artemether-lumefantrine regimen is predicted to overcome these drug-drug interactions with efavirenz and rifampin, respectively.




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    Comparison of Treatment Outcomes between Analysis Populations in the RESTORE-IMI 1 Phase 3 Trial of Imipenem-Cilastatin-Relebactam versus Colistin plus Imipenem-Cilastatin in Patients with Imipenem-Nonsusceptible Bacterial Infections [Clinical Therapeutic

    The RESTORE-IMI 1 phase 3 trial demonstrated the efficacy and safety of imipenem-cilastatin (IMI) combined with relebactam (REL) for treating imipenem-nonsusceptible infections. The objective of this analysis was to compare the outcomes among patients meeting eligibility requirements based on central laboratory susceptibility versus local laboratory susceptibility. Patients with serious infections caused by imipenem-nonsusceptible, colistin-susceptible, and imipenem-REL-susceptible pathogens were randomized 2:1 to IMI-REL plus placebo or colistin plus IMI for 5 to 21 days. The primary endpoint was a favorable overall response. Key endpoints included the clinical response and all-cause mortality. We compared outcomes between the primary microbiological modified intent-to-treat (mMITT) population, where eligibility was based on central laboratory susceptibility testing, and the supplemental mMITT (SmMITT) population, where eligibility was based on local, site-level testing. The SmMITT (n = 41) and MITT (n = 31) populations had similar baseline characteristics, including sex, age, illness severity, and renal function. In both analysis populations, favorable overall response rates in the IMI-REL treatment group were >70%. Favorable clinical response rates at day 28 were 71.4% for IMI-REL and 40.0% for colistin plus IMI in the mMITT population, whereas they were 75.0% for IMI-REL and 53.8% for colistin plus IMI in the SmMITT population. Day 28 all-cause mortality rates were 9.5% for IMI-REL and 30.0% for colistin plus IMI in the mMITT population, whereas they were 10.7% for IMI-REL and 23.1% for colistin plus IMI in the SmMITT population. The outcomes in the SmMITT population were generally consistent with those in the mMITT population, suggesting that outcomes may be applicable to the real-world use of IMI-REL for treating infections caused by imipenem-nonsusceptible Gram-negative pathogens. (This study has been registered at ClinicalTrials.gov under identifier NCT02452047.)




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    Population Pharmacokinetics of Amikacin Administered Once Daily in Patients with Different Renal Functions [Clinical Therapeutics]

    The aim of this work was to evaluate the pharmacokinetics of amikacin in Mexican patients with different renal functions receiving once-daily dosing regimens and the influence of clinical and demographical covariates that may influence the optimization of this antibiotic. A prospective study was performed in a total of 63 patients with at least one determination of amikacin plasma concentration. Population pharmacokinetic (PK) parameters were estimated by nonlinear mixed-effects modeling; validations were performed for dosing recommendation purposes based on PK/pharmacodynamic simulations. The concentration-versus-time data were best described by a one-compartment open model with proportional interindividual variability associated with amikacin clearance (CL) and volume of distribution (V); residual error followed a homoscedastic trend. Creatinine clearance (CLCR) and ideal body weight (IBW) demonstrated significant influence on amikacin CL and V, respectively. The final model [CL (liters/h) = 7.1 x (CLCR/130)0.84 and V (liters) = 20.3 x (IBW/68)2.9] showed a mean prediction error of 0.11 mg/liter (95% confidence interval, –3.34, 3.55) in the validation performed in a different group of patients with similar characteristics. There is a wide variability in amikacin PK parameters in Mexican patients. This leads to inadequate dosing regimens, especially in patients with augmented renal clearance (CLCR of >130 ml/min). Optimization based on the final population PK model in Mexican patients may be useful, since reliability and clinical applicability have been demonstrated in this study.




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    Dose Optimization of Cefpirome Based on Population Pharmacokinetics and Target Attainment during Extracorporeal Membrane Oxygenation [Clinical Therapeutics]

    To obtain the optimal dosage regimen in patients receiving extracorporeal membrane oxygenation (ECMO), we developed a population pharmacokinetics model for cefpirome and performed pharmacodynamic analyses. This prospective study included 15 patients treated with cefpirome during ECMO. Blood samples were collected during ECMO (ECMO-ON) and after ECMO (ECMO-OFF) at predose and 0.5 to 1, 2 to 3, 4 to 6, 8 to 10, and 12 h after cefpirome administration. The population pharmacokinetic model was developed using nonlinear mixed effects modeling and stepwise covariate modeling. Monte Carlo simulation was used to assess the probability of target attainment (PTA) and cumulative fraction of response (CFR) according to the MIC distribution. Cefpirome pharmacokinetics were best described by a two-compartment model. Covariate analysis indicated that serum creatinine concentration (SCr) was negatively correlated with clearance, and the presence of ECMO increased clearance and the central volume of distribution. The simulations showed that patients with low SCr during ECMO-ON had lower PTA than patients with high SCr during ECMO-OFF; so, a higher dosage of cefpirome was required. Cefpirome of 2 g every 8 h for intravenous bolus injection or 2 g every 12 h for extended infusion over 4 h was recommended with normal kidney function receiving ECMO. We established a population pharmacokinetic model for cefpirome in patients with ECMO, and appropriate cefpirome dosage regimens were recommended. The impact of ECMO could be due to the change in patient status on consideration of the small population and uncertainty in covariate relationships. Dose optimization of cefpirome may improve treatment success and survival in patients receiving ECMO. (This study has been registered at ClinicalTrials.gov under identifier NCT02581280.)