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Backbones versus core agents in initial ART regimens: one game, two players.

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Advances in antiretroviral therapy (ART) have led to highly effective HIV treatments. Current optimal regimens often include integrase inhibitors and nucleoside reverse transcriptase inhibitors (NRTIs) for improved safety and efficacy.

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Area of Science:

  • Virology
  • Pharmacology
  • Infectious Diseases

Background:

  • Antiretroviral therapy (ART) has significantly advanced over 30 years, evolving from monotherapy to complex drug combinations.
  • The development of HIV RNA as a surrogate marker accelerated the evaluation and refinement of new therapeutic strategies.
  • Early ART regimens focused on single agents, but triple-drug combinations proved more effective.

Purpose of the Study:

  • To review the evolution of ART, highlighting key advancements and optimal treatment strategies.
  • To discuss the efficacy and toxicity profiles of different ART components, including NNRTI, boosted PI, and NRTI.
  • To identify current trends and future directions in HIV treatment, focusing on integrase inhibitors and NRTI-sparing approaches.

Main Methods:

  • Literature review of ART advancements over the past three decades.
  • Analysis of clinical trial data and surrogate marker utility in evaluating ART efficacy.
  • Comparative assessment of different ART regimen compositions, including monotherapy, dual therapy, and triple therapy.

Main Results:

  • Triple-drug regimens, typically incorporating a core agent (NNRTI or boosted PI) and two NRTIs, are considered optimal for initial therapy.
  • Integrase strand transfer inhibitors, such as dolutegravir, demonstrate superior safety and efficacy, becoming preferred core agents.
  • While backbone-only or core-only regimens are less successful, NRTIs remain crucial, with lamivudine and emtricitabine showing promise.

Conclusions:

  • Modern ART has achieved outstanding efficacy, with integrase inhibitors representing a significant breakthrough.
  • Optimizing ART involves balancing efficacy, toxicity, and drug interactions, with NRTIs remaining essential components.
  • Ongoing research focuses on longer-acting agents, cost-effectiveness, and NRTI-sparing strategies to address remaining unmet needs in HIV management.