Acquired Immunodeficiency Syndrome

LOS ANGELES--( BUSINESS WIRE )-- AIDS Healthcare Foundation (AHF) is calling on the government of Trinidad and Tobago to consider issuing a compulsory license for Tivicay (dolutegravir), a GSK antiretroviral (ARV) drug that treats HIV, which currently costs 25 times more than available biosimilar generics in neighboring Caribbean countries. In February, AHF and the Medical Research Foundation of Trinidad & Tobago sent a letter to GSK CEO Dame Emma Walmsley, which in part stated, “We urge you to address the lack of access to the antiretroviral drug Tivicay in Trinidad due to its high cost by lowering its price in line with biosimilar generics available in the Caribbean Region – or by committing not to threaten legal action against the purchase of a generic version of Tivicay.” To date, GSK has yet to respond to the letter. Currently, Tivicay is under patent protection in Trinidad and Tobago, and GSK has threatened legal action if the country decides to import affordable generic ARVs. “As a small island nation, Trinidad and Tobago is still recovering from the economic and social consequences of COVID-19 – paying 25 times more to provide lifelong HIV treatment for its people is untenable,” said AHF President Michael Weinstein. “In the face of GSK’s unwillingness to budge on pricing, we, together with our local partners, see no other option than to call on the government of Trinidad and Tobago to invoke its sovereign right to do whatever is necessary to protect its people’s health, which in this case, would include issuing a compulsory license for Tivicay.” About AIDS Healthcare Foundation (AHF) AIDS Healthcare Foundation (AHF) is a global non-profit organization providing cutting-edge medicine and advocacy to over 1.9 million people in 46 countries worldwide in the US, Africa, Latin America/Caribbean, the Asia/Pacific Region and Europe. We are currently the largest non-profit provider of HIV/AIDS medical care in the world. To learn more about AHF, please visit our website: www.aidshealth.org , find us on Facebook: www.facebook.com/aidshealth and follow us on Twitter: @aidshealthcare and Instagram: @aidshealthcare

BOISE, Idaho, March 11, 2024 /PRNewswire/ -- Prominently featured in The Inner Circle, Sharon E. Oster, MD, is acknowledged as a Pinnacle Life Member for her contributions to the fields of Internal Medicine and Infectious Diseases. Dr. Oster began her scholarship at the University of Colorado where she completed a Bachelor of Science degree with honors from The Phi Beta Kappa Society. She followed this accomplishment at East Virginia Medical School where she completed a medical degree in 1980. Recognized as the Resident of the Year award, the doctor completed her residency at the Veterans Administration (VA) Medical Center. The doctor had extensive experience prior to her current position working at Saint Alphonsus Hospital from 1999 to 2006 and then serving as Chief of the Infection Control Committee in Pinole, CA, from 1990 to 1998. She also served with the AIDS clinics in Martinez and Oakland, CA, from 1985 to 1999, and as an assistant professor of medicine at the University of California at Davis from 1985 to 1989. Considered a leader in her field, Dr. Oster is considered an expert in internal medicine and infectious diseases. She is the owner and a practicing physician at Oster Medical Group in Boise, ID and attributes her success to her talent for connecting with her patients. Dedicated to providing the latest innovations in internal medicine and infectious diseases, Dr. Oster is a member of the American Society for Microbiology (ASM); the American Board of Internal Medicine; and her respective state and county medical associations. A testament to her expertise, the doctor was recognized with America's Best in Medicine Award by the American Health Council in 2019. In addition to her professional pursuits, Dr. Oster volunteers with the Idaho Historical Society and participates as an accomplished flutist in the Canyon County Flute Orchestra as well as the Mulligan Capital City Band. She also enjoys reading mysteries. Dr. Oster wishes to honor the loving memory of her dear husband, David; her father, Robert; her mother, Caroline; and her grandmother, Ellen Evans. She would also like to acknowledge her daughter, Stephanie, and thank her for her love and support. In the future, Dr. Oster hopes to retire soon. Contact: Katherine Green, 516-825-5634, [email protected] SOURCE The Inner Circle

All modern Plasmodium falciparum, the deadliest malaria parasite in humans, are descendants of one initial infection and so are very closely related, with relatively limited genetic differences. A long-standing mystery in the field has revolved around a very few locations in the P. falciparum genome where there are 'spikes' of mutations -- far more than anywhere else. Researchers have identified two genes in which these unusual mutation spikes result from DNA being copied and pasted from one gene to another. By dissecting the genetic diversity of the most deadly human malaria parasite -- Plasmodium falciparum -- researchers at EMBL's European Bioinformatics Institute (EMBL-EBI) have identified a mechanism of 'copy-paste' genetics that increases the genetic diversity of the parasite at accelerated time scales. This helps solve a long-standing mystery regarding why the parasite displays hotspots of genetic diversity in an otherwise unremarkable genetic landscape. Malaria is most commonly transmitted through the bites of female Anopheles mosquitoes infected with P. falciparum. The latest world malaria report states that in 2022, there were an estimated 249 million malaria cases and over 600,000 malaria deaths across the globe. 94% of malaria cases and 95% of malaria deaths are found in Africa, with infants, pregnant women, travellers, and people with HIV/AIDS being at higher risk. The new study, published in the journal PLOS Biology, provides key insights into the evolutionary history of P. falciparum through the analysis of two genes that encode surface proteins critical to immune evasion. The genes in question are DBLMSP and DBLMSP2. These findings deepen our understanding of how the malaria parasite has evolved and could help to inform new approaches to vaccine development, offering hope for more effective prevention methods against a disease that continues to impact millions globally. Copy-paste genetics Usually, the sequence of an individual's gene is inherited from their parents, but in some circumstances, part of a gene sequence can be copied between different genes on the same DNA molecule -- this is known as non-allelic gene conversion. This process has been linked to the evolution of important gene families, including those involved in the functioning of the human immune system. One of this study's key discoveries is that gene conversion takes place between the P. falciparum DBLMSP and DBLMSP2 genes and results in increased genetic diversity within the surface proteins of the parasite. Since these proteins are exposed to, and interact with our immune system, they are potential vaccine targets, and a fuller understanding of their genetic diversity could be very valuable for vaccine design. "The discovery of 'copy-paste' genetics within malaria's DNA reveals the impact of an underestimated evolutionary mechanism," said Brice Letcher, Postdoctoral Researcher at the Laboratory for Biology and Modelling of the Cell (LBMC, France) and former PhD student at EMBL-EBI. "Here we show that gene conversion was a potentially important strategy behind malaria's ability to adapt and thrive in humans, including possibly to evade the human immune system. Understanding this genetic flexibility offers new perspectives on malaria's persistence in and adaptation to the human host." Mapping hidden genetic diversity in malaria parasites Any immune-interacting protein is potentially a vaccine target, but knowledge of global genetic diversity is an important requirement for vaccine development. For example, influenza and SARS-CoV-2 vaccines are developed based on the knowledge of how their genomes have evolved. However, the very unusual hotspots of genetic diversity in the P. falciparum DBLMSP and DBLMSP2 genes are so extreme that current algorithms for mapping genetic variants failed to capture them, leaving researchers unaware of a large proportion of the variation in these genes. To address this, the researchers developed new bioinformatics software that uses genome graphs and analysed a broad sample of parasites from 29 countries. This new approach revealed a wide range of previously hidden variants, and with these, they were able to demonstrate that multiple gene conversion events had occurred. These new variants, available for download from the website linked to the study, provide a valuable resource for the malaria research community. "Genome graphs are a great bioinformatics method to help us decode the complex genetic landscapes arising from the interplay between pathogens and human hosts," said Sorina Maciuca, co-author and former PhD student in the Iqbal group and Genomics Data Scientist at Genomics England. "They allow us to take into account a broader spectrum of genetic diversity and obtain new insights into how pathogens like P. falciparum evolve and evade our immune defences." What are genome graphs? The traditional approach in genomics is to define one reference genome and describe any other genome as a set of small differences from this reference. This does not work well when genomes differ too much. Genome graphs take a population of genomes and build an ensemble reference which is aware of all of the genetic variation in the species. "This research provides a comprehensive map of genetic diversity of these two fascinating genes in P. falciparum," said Zamin Iqbal, Group Leader at EMBL-EBI and Professor of Algorithmic and Microbial Genomics at the University of Bath. "We have been trying to understand the unusual patterns in these genes for almost a decade now, and our best hypothesis had been that the really different "versions'' of the gene were being preserved by natural selection, for unknown reasons. We have shown here that, in fact, this copying mechanism -- gene conversion -- has been repeatedly creating these anomalous different "versions" of the genes. This data not only enhances our grasp of malaria's biology, but also will be valuable to researchers across the world studying these genes and their interaction with our immune system."