Groups With Highest Unmet Need for PrEP Highlighted in Analysis
Continuing their journey to develop a vaccine for HIV, Oregon Health & Science University researchers have identified a gene that could have prevented their vaccine from working in humans.
The study, published Oct. 11 in Science Immunology, removes one more barrier to developing a vaccine for HIV, and potentially other diseases such as malaria and cancer.
Daniel Malouli, Ph.D., assistant professor in the OHSU Vaccine and Gene Therapy Institute and lead author on the study, said the research team looked at whether human cytomegalovirus, or HCMV, has additional genes that could prevent a particular immune response which would keep their vaccine from working against HIV.
In previous studies, the team's research with nonhuman primates showed that vaccines based on rhesus CMV, called RhCMV, trigger unique T cell responses not seen with any other vaccine. They found that these unique immune responses are essential for rhesus CMV-based vaccines to be effective against SIV, the pathogen most used to model HIV/AIDS in nonhuman primates.
Human and rhesus CMV are similar, and in past studies, OHSU researchers at the OHSU Vaccine and Gene Therapy Institute discovered that rhesus CMV needs certain genes turned off to trigger these unique immune responses. This is the result of decades of work by the research team led by VGTI associate director Louis Picker, M.D., and professors Klaus Früh, Ph.D., and Scott Hansen, Ph.D.
Read more on the study here