The most commonly used illicit stimulant in HIV-infected individuals is methamphetamine (MA), and prior studies demonstrate strong evidence that MA promotes increased HIV transcription as well as immune dysregulation. HIV cure has emerged as an important clinical and research priority given evidence of ongoing immune dysfunction in HIV-infected individuals despite effective antiretroviral therapy (ART). A challenge in achieving worldwide HIV eradication is targeting specific vulnerable populations who are most likely to benefit from an HIV cure but possess poorer immune responses as a result of residual viral replication due to suboptimal ART adherence and/or direct immune dysfunction from illicit substance use. Prior non-human studies demonstrate that MA directly induces HIV production and promotes immune activation and inflammation. These preclinical findings suggest that HIV+ individuals who use MA may experience greater immune dysfunction and face additional challenges for future HIV eradication. This study will investigate the effects of short-term MA exposure in HIV+ ART-suppressed individuals without a prior history of MA use. Participants will be enrolled in an interventional study where they will be administered oral methamphetamine (the maximum FDA approved daily dose for the treatment of childhood obesity) to determine the effects of short-term MA exposure on residual virus production, gene expression, inflammation, and trace amine-associated 1 (TAAR1, a promising drug target for psychostimulant addiction) signaling. MA exposure will be quantified with multiple serum samples collected over a 24-hour monitoring period and associated with residual viral transcription, host gene and cell surface protein expression, and inflammation (plasma inflammatory cytokine levels) quantification. The proposed study will be the first human genetic study to directly evaluate the effect of MA exposure on residual viral transcription during effective ART. The overall goals of the study are to integrate a rigorous clinical study designs with high throughput 'omics data to identify novel targets for reversing HIV latency, reducing inflammation, and personalizing future therapeutic strategies specific to HIV+ ART-suppressed individuals who use MA.
The most commonly used illicit stimulant in HIV-infected individuals is methamphetamine (MA). Prior studies demonstrate strong evidence that MA promotes increased HIV transcription as well as immune dysregulation. A challenge in achieving worldwide HIV eradication is targeting specific marginalized populations who are most likely to benefit from an HIV cure but possess poorer immune responses. For this study, HIV+ infected ART-suppressed individuals with no prior history of MA use disorder will be administered oral methamphetamine (the maximum FDA approved daily dose for the treatment of childhood obesity) to determine the effects of short-term MA exposure on residual virus production, gene expression, and inflammation. Measures of MA exposure in urine and serum will then be associated with residual virus production, gene expression, cell surface immune marker protein expression, and systemic markers of inflammation. The clinical trial data will generate advanced gene expression and immunologic data to identify potential novel targets for reversing HIV latency, reducing inflammation, and personalizing future therapies in HIV+ individuals who use MA.