Recent research highlights how genetic diversity and novel immune mechanisms could pave the way for new HIV cure strategies.
Why can some people living with HIV naturally control the virus without antiretroviral therapy? A new scientific review by Barry Ryan, Jacques Fellay, and Christian W. Thorball, sheds new light on the genetic and biological mechanisms behind this rare phenomenon.
Published in Current Opinion in HIV and AIDS, the review examines so-called HIV elite controllers, who represent fewer than 1% of people living with HIV and can maintain extremely low or undetectable viral levels without treatment.
While certain immune-related genetic variants, particularly within the human leukocyte antigen (HLA) system, have long been associated with natural HIV control, emerging discoveries reveal a more complex picture. One major breakthrough is the identification of genetic variation near the CHD1L gene, found in populations of African ancestry, that is associated with reduced HIV viral load. This finding highlights the importance of including genetically diverse populations in biomedical research and points to previously unexplored mechanisms of viral restriction.
The review also emphasizes the role of epigenetic regulation and immune responses in controlling HIV. Importantly, researchers identify a critical distinction between suppressing viral replication and eliminating the latent viral reservoir—the hidden virus that persists in infected cells despite effective viral control.
Although elite controllers provide a valuable model for a functional HIV cure, some continue to experience chronic inflammation and immune activation. Future therapeutic approaches must therefore aim not only to achieve sustained viral suppression without medication but also to preserve long-term immune health.
A must-read also for residents starting their training in HIV care!