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Women account for approximately half of all individuals living with HIV worldwide, and researchers wanted to identify the risk factors that increase susceptibility of women to genital infection. Because HIV and other sexually transmitted viruses must penetrate the genital mucosal barrier to establish infection, researchers at The Ohio State University Wexner Medical Center sought to identify factors that weaken genital mucosal barrier defenses. Their research, recently published in the journal of  Mucosal Immunology , shows significantly increased susceptibility of female mice to genital tract viral infections after treatment with depot medroxyprogesterone acetate (DMPA) or levonorgestrel (LNG), two injectable compounds used by women for hormonal contraception. Specifically, treatment of mice with DMPA or LNG decreased barrier protection in the female genital tract by increasing epithelial permeability. This greater permeability increased the chances that a viral pathogen ...

The researchers discovered DNA 'fossils' of parasitic nematodes in seven teams of birds (clockwise): trogons, mesites, parrots, hummingbirds, hornbills, manakins, tinamous. Credit score: Alexander Suh and Jon Fjeldså In uncommon cases, DNA is thought to have jumped from one species to a different. If a parasite's DNA jumps to its host's genome, it might depart proof of that parasitic interplay that could possibly be discovered tens of millions of years later -- a DNA 'fossil' of types. A world analysis staff led from Uppsala College has found a brand new sort of so-called transposable ingredient that occurred within the genomes of sure birds and nematodes. The outcomes are revealed in  Nature Communications . Dr. Alexander Suh at Uppsala College is an professional on the small stretches of DNA that have a tendency to leap from one place to a different, known as transposable parts. Working with a sta...

New funding is not enough to guarantee success against emerging infectious diseases around the world. Rather, good governance, a long-term technology investment strategy and strong product management skills are essential, say a Dartmouth College researcher and her co-author. Their article appears in the journal  Nature Biotechnology . Kendall Hoyt, Ph.D., an assistant professor at the Geisel School of Medicine at Dartmouth and an expert in biosecurity, and Richard Hatchett, M.D., the acting director of the Biomedical Advanced Research and Development Authority (BARDA) at the U.S. Department of Health and Human Services, propose a new way to develop countermeasures for Ebola, Zika and other emerging infectious diseases. As momentum builds for an international effort to develop drugs and vaccines for emerging infectious diseases, the duo examined U.S. biodefense programs to understand approaches that might work and developed a global strategy for countermeasure development. ...

"The medical issues in treating people with HIV have changed," says Howard Fox, a Professor in the Department of Pharmacology and Experimental Neuroscience at the University of Nebraska Medical Center and one of the authors of the new study. "We're no longer as worried about infections that come from being immunocompromised. Now we worry about diseases related to aging, like cardiovascular disease, neurocognitive impairment, and liver problems." The tool used in the new study looks at epigenetic changes in people's cells. Epigenetic changes affect the DNA, but not the DNA sequence. Once they occur, they are passed down from one generation of cell to the next, influencing how genes are expressed. The particular epigenetic change used as a biomarker in this research was methylation , the process by which small chemical groups are attached to DNA. Methylation of DNA can impact how genes get translated into proteins. "What we've seen in previous ...

"In many countries in sub-Saharan Africa where malaria is endemic, a high proportion of the population carry the parasite but do not show any clinical symptoms. This is particularly problematic when it comes to donated blood transfusions as it puts the recipients at high risk of infection if no blood treatment procedure is provided," says Professor Jean-Pierre Allain, lead author from the University of Cambridge, Cambridge, UK. "Testing for parasites such as malaria is expensive and until now, there have been no technologies capable of treating whole blood, which is most commonly used in transfusions in sub-Saharan Africa. This is the first study to look at the potential of pathogen-reduction technology in a real-world treatment setting and finds that although the risk of malaria transmission is not completely eliminated, the risk is severely reduced." The study is published ahead of World Malaria Day. Every year, approximately 214 million people worldwide are i...

Dr. Axel Kallies, The Walter and Eliza Corridor Institute. Credit score: The Walter and Eliza Corridor Institute of Medical Analysis Melbourne researchers have uncovered the genes chargeable for the way in which the physique fights an infection on the level of 'invasion' -- whether or not it is the pores and skin, liver, lungs or the intestine. Analysis led by Dr Axel Kallies and Dr Klaas van Gisbergen on the Walter and Eliza Corridor Institute of Medical Analysis, and Dr Laura Mackay from the College of Melbourne on the Peter Doherty Institute for An infection and Immunity has recognized the genes Hobit and Blimp1 and located that these genes management a common molecular program chargeable for inserting immune cells on the 'entrance strains' of the physique to combat an infection and most cancers. The presence of those organ-residing cells, which differ strikingly from their counterparts circulating within ...

In a new study, University of Massachusetts Amherst researchers Krishna Poudel and colleagues report that zinc deficiency may contribute to chronic inflammation among HIV-positive individuals. Theirs is believed to be the first investigation to explore the association between serum zinc levels and inflammation among people with human immunodeficiency virus (HIV) infection, while taking their anti-retroviral therapy (ART) into account. As the authors note, zinc functions as an anti-inflammatory agent, and zinc deficiency is a common micronutrient abnormality seen in people with HIV. But more work is needed to determine whether zinc supplements might help to reduce inflammation and further, to identify a subpopulation of patients who might benefit from this, they add. Poudel, an associate professor of community health education at UMass Amherst's School of Public Health and Health Sciences, with his colleagues epidemiologist Elizabeth Bertone-Johnson and Kalpana Poudel-Tanduka...

New analysis from North Carolina State College and Pennsylvania State College finds that black feminine faculty college students have been usually unlikely to make use of on-line assets associated to HIV prevention, as a result of stigma related to the illness and issues that their social community would study they have been accessing HIV-related supplies. "We assumed that offering details about HIV prevention on-line can be an efficient method of reaching black feminine faculty college students," says Fay Cobb Payton, an affiliate professor of knowledge expertise at NC State and lead creator of a paper on the work. "We thought it will resonate and be accepted, and we have been incorrect." The researchers convened eleven focus teams, consisting of a complete of 60 black ladies who have been faculty college students. Half of the main focus teams have been based mostly in North Carolina, the others in Pennsylvania. Pri...

Tens of millions of these contaminated with HIV worldwide are younger ladies, ages 15-24, in accordance with the World Well being Group. As a result of the HIV epidemic overlaps with an epidemic of intimate accomplice violence ( IPV ) towards ladies and ladies, researchers have suspected a correlation between inequities in relationship energy and the dangerous sexual conduct that may result in HIV transmission. A brand new analysis research from the College of Pennsylvania's Faculty of Nursing (Penn Nursing), Annenberg Faculty for Communication, and Perelman Faculty of Drugs investigated and confirmed these associations of intimate accomplice violence (IPV) and relationship energy with sexual-risk behaviors in adolescents. The researchers recognized promising pathways to scale back IPV and assist stop HIV an infection, together with promotion of gender fairness as a social norm. The findings are set for publication in an upcoming subj...

When retroviruses corresponding to HIV infect a cell, they first make a replica of their RNA genome within the type of DNA. The comparatively quick viral DNA strand then strikes to the cell nucleus, the place it inserts itself into the host cell's DNA. A brand new examine led by researchers at The Ohio State College Complete Most cancers Heart -- Arthur G. James Most cancers Hospital and Richard J. Solove Analysis Institute (OSUCCC -- James) reveals particulars about how such viral DNA insertion complexes hunt for an acceptable spot and the way shortly insertion occurs on the chosen website. The findings may assist enhance remedies for HIV an infection and make gene remedy safer and extra environment friendly. The researchers used Prototype Foamy Virus integrase as a mannequin and two molecular microscopy strategies to report viral integration complexes touring alongside stretches of goal DNA searching for insertion factors. (Integr...