Variable responses to ART are due at least in part to human genetic variants that affect drug metabolism, drug disposition, and off-site drug targets. Defining effects of human genetic variants on HIV treatment toxicity, efficacy, and pharmacokinetics has far-reaching implications. Substances of abuse (opioid, stimulants, nicotine, anxiolytics, alcohol, etc.) and its treatments (methadone, buprenorphine, extended naltrexone, etc.) may interact with ART, altering its bioavailability, its safety, and its efficacy. It is known that nevirapine and efavirenz increase methadone clearance. New evidence demonstrates that variabilities in responses to ART depend in part on genetic variants for certain drugs of abuse and its therapies. For instance, a NR1I3 gene variant affected methadone clearance only in those taking efavirenz. Two other genetic variants in the ABCB1 and CYP2B6 genes decreased methadone clearance. More research, though, is necessary to better understand the role of pharmacogenomics in people with HIV (PLWH) with substance use disorders (SUD).
This notice applies to due dates on or after June 5, 2023 and subsequent receipt dates through May 8, 2026.
NOT-DA-24-001
Sponsor Institute/Organizations: National Institutes of Health
Address: National Institutes of Health; 31 Center Drive; MSC 2220; Bethesda; MD 20892-2220; USA
Oct 05, 2024
Varies
Affiliation: National Institutes of Health
Address: National Institutes of Health; 31 Center Drive; MSC 2220; Bethesda; MD 20892-2220; USA
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