Breakthroughs Blog: HIV/AIDS

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. The US Department of Health and Human Services, through the Biomedical Advanced Research and Development Authority, has awarded $176 million to Moderna to support the continued development of a pandemic influenza vaccine that could be used to treat bird flu in people, as concerns about the spread of bird flu cases in dairy cows across the United States continue to rise. Moderna's bird flu vaccine candidate is in very early-stage testing and uses the same mRNA technology as its COVID-19 vaccine. The new funding could support a late-stage trial of the vaccine candidate as early as next year if early study results continue to be positive. The vaccine could also be quickly redirected to target another form of influenza if a different threat emerges.A research team has developed a test that will help measure the persistence of HIV in people affected by viral strains found predominantly in Africa, which are greatly understudied, helping to fill a major gap in HIV research. Most HIV studies have focused on the strains circulating in Western countries, predominantly by men who have sex with men affected by subtype B, with much fewer studies examining strains circulating in Africa, where women are disproportionately affected. The new laboratory test allows researchers to determine whether following antiretroviral treatment there is any intact viral DNA capable of producing new viruses if antiretroviral treatment is interrupted. The test is already being used to study long-term viral persistence in Uganda and could be a vital tool in the search for an HIV cure that could target and eliminate this intact DNA reservoir.Last week, the US National Institutes of Health (NIH) announced the launch of a Phase 1 trial testing a nasal vaccine against COVID-19, the first trial conducted by NIH’s National Institute for Allergy and Infectious Diseases as part of Project NextGen, a US government initiative designed to advance the development of next-generation COVID-19 vaccines. In preclinical nonhuman primate studies, the candidate, MPV/S-2P, elicited a strong systemic immune response, as well as mucosal immunity, which plays an important role in controlling respiratory virus replication. Next-generation vaccines, including nasal vaccines, are a key tool needed to reduce COVID-19 infections and transmission as new variants of the virus continue to emerge.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. Last week, Gilead Sciences shared results from a late-stage study showing that its long-acting injectable HIV prevention drug, lenacapavir, was more effective at preventing HIV infection in cisgender women and adolescent girls compared to the company’s daily pill, Truvada. The study, which included more than 5,300 cisgender women and adolescent girls, was stopped early by an independent committee because the results exceeded efficacy expectations, with no incidences of HIV infection among participants who received the drug compared to those who were not on any prevention regimen. Truvada is already in wide use for both HIV treatment and prevention, but the twice-a-year lenacapavir injection, which could be approved for HIV prevention regimens by the end of next year, offers an option that could be much easier to adhere to than the daily pill for many people, especially higher-risk individuals.In Paris last week, as part of the replenishment launch for Gavi, the Vaccine Alliance, the African Vaccine Manufacturing Accelerator was launched, a project Gavi will invest $1 billion into over the next decade to help increase Africa’s vaccine manufacturing base to accelerate the rollout of vaccines and improve pandemic preparedness on the continent. This project follows glaring inequities in access to COVID-19 technologies faced by African countries during the pandemic. Specifically, Gavi will provide financial incentives to African vaccine manufacturers once they hit supply and regulatory milestones, using market forces to drive down prices and encourage upstream investment. The project set the goal for Africa countries to produce 60 percent of the vaccines used by the continent by 2040, up from 2 percent currently. It will also explore issues including technology transfer and regulatory harmonization.Elion Therapeutics recently announced the close of an $81 million funding round to advance the development of its next-generation polyene antifungal candidate, SF001, designed to reduce toxicity and address critical challenges associated with currently available antifungal options. The news comes as growing resistance to existing antifungals and increasing fungal infection rates highlight the need for new and improved tools. The promising compound received Qualified Infectious Disease Product and Fast Track designations in 2023 from the US Food and Drug Administration for early antifungal therapy of presumed invasive fungal infection and treatment of invasive aspergillosis. The funding round includes investments from the public-private partnership AMR Action Fund, the fund’s first investment in an antifungal company.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. Last Wednesday, US Food and Drug Administration advisers recommended that next fall’s updated COVID-19 vaccine target the lineage of the JN.1 variant, which became dominant in the United States last winter. There was some debate among experts on whether the vaccine should target the KP.2 subtype of the variant that is now most common in the United States or other offshoot subtypes that may become more dominant over the summer, ultimately deciding to target JN.1 itself, with the hope that the vaccine would offer some cross-protection against other subvariants that might emerge. Moderna, Pfizer, and Novavax say they could have JN.1.-specific shots ready by the fall.Two clinical trials have been launched to test a new, long-acting form of HIV pre-exposure prophylaxis, or PrEP, in cisgender women and people who inject drugs, two populations that have been largely underrepresented in HIV clinical trials. The mid-stage studies, sponsored and funded by Gilead and implemented through the HIV Prevention Trials Network, will test lenacapavir, an injectable antiretroviral drug administered every six months, which is already approved by the US Food and Drug Administration for HIV treatment in combination with other antiretroviral therapy for heavily treatment-experienced individuals and is the first in the capsid inhibitors class of drugs to be FDA approved for HIV treatment. The researchers hope these studies will provide critical data on the use of lenacapavir as HIV PrEP.Last week, the Sabin Vaccine Institute announced a new research project with the Kenya Medical Research Institute aimed at optimizing the use of the oral cholera vaccine in the face of a global resurgence in cholera and acute vaccine shortages, hopefully improving the impact of the vaccine and saving lives. The shortage of the oral cholera vaccine in 2022 led the World Health Organization (WHO) to temporarily modify the two-dose vaccine regimen and recommend a single dose during outbreaks, underscoring the urgent need for research to optimize vaccine use. WHO currently recommends two doses of oral cholera vaccine two weeks apart. The new research will test strategies to extend the time between doses to ensure that more people can receive protection.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign up now to receive our weekly R&D News Roundup email. A new study successfully stimulated animals’ immune systems to induce a rare, priority class of HIV broadly neutralizing antibodies (bNAbs), findings that the researchers hope could eventually lead to an HIV vaccine that generates multiple classes of bNAbs to prevent HIV. The researchers engineered immunogens, or molecules used in vaccines to elicit a specific immune response, and tested them in monkeys and mice to see if they induced antibodies that showed signs of maturing into the class of HIV bnABs that is a priority for HIV vaccine development because it neutralizes a broad range of HIV variants. bnAbs are seen as an especially promising strategy for HIV vaccine development because they bind to parts of the genetically diverse virus that stay constant even as it mutates. These findings support the potential of these immunogens as the first part of a multistep vaccine regimen for humans.The Coalition for Epidemic Preparedness Innovations (CEPI) has awarded $6.5 million to support phase 2 clinical trials of Bavarian Nordic’s MVA-BN mpox vaccine for children in Africa, as the disease has spread rapidly in recent years and has particularly affected children, who account for most of the infections and deaths in the current outbreaks in East and Central Africa. The study, which is expected to launch later this year in one or more African countries, will enroll 460 people in endemic regions who do not have a history of mpox illness or vaccination. This trial also complements a plan by African countries, announced in April, to coordinate mpox efforts.Last week, the Ministry of Health of Indonesia and the Medicines Patent Pool (MPP) announced that they have signed a Memorandum of Understanding to improve access to and uptake of vaccines and medicines in Indonesia, as well as to strengthen local production in the country. MPP will provide technical assistance on local manufacturing by identifying possible manufacturing partners, exploring opportunities for technology transfer, and working with manufacturers to strengthen their capacity to produce high-quality, affordable products and new technologies, including mRNA vaccines. The partnership will also support the introduction of innovative medicines that address current access gaps and needs, health workforce capacity-strengthening, and support for the licensing and uptake of products licensed by MPP.