Understanding HIV-1 drug resistance

Area of Science:

• * Virology and Infectious Diseases
• * Molecular Epidemiology of Viral Infections

Background:

• * Drug-resistant Human Immunodeficiency Virus type 1 (HIV-1) poses a significant challenge to effective antiretroviral therapy (ART).
• * Resistance can emerge through the acquisition of pre-existing mutant strains or the selection of resistant variants within an infected individual.
• * The compromised efficacy of ART due to drug resistance necessitates careful management and treatment strategies.

Purpose of the Study:

• * To review the key factors contributing to the selection and emergence of drug-resistant HIV-1 strains.
• * To detail the interpretation of genotypic and phenotypic HIV-1 drug resistance testing.
• * To provide guidance for clinicians in selecting appropriate ART regimens based on resistance profiles.

Main Methods:

• * Literature review of studies on HIV-1 drug resistance mechanisms.
• * Analysis of factors influencing the selection of drug-resistant HIV-1.
• * Review of methodologies and interpretation guidelines for genotypic and phenotypic resistance assays.

Main Results:

• * Factors such as suboptimal adherence to ART, viral replication, and specific drug classes are associated with the selection of drug-resistant HIV-1.
• * Genotypic testing identifies specific mutations conferring resistance, while phenotypic testing measures the virus's susceptibility to drugs.
• * Accurate interpretation of both test types is essential for guiding ART choices.

Conclusions:

• * Drug-resistance testing is a critical component in guiding ART selection for patients with HIV-1 infection.
• * Understanding the interplay between resistance mechanisms and treatment regimens is vital for optimizing patient outcomes.
• * Continued research and improved diagnostic interpretation are necessary to combat the evolving challenge of HIV-1 drug resistance.