Brief Report: No Differences Between Lopinavir/Ritonavir and Nonnucleoside Reverse Transcriptase Inhibitor-Based Antiretroviral Therapy on Clearance of Plasmodium falciparum Subclinical Parasitemia in Adults Living With HIV Starting Treatment (A5297)

J Acquir Immune Defic Syndr. 2022 Feb 1;89(2):178-182. doi: 10.1097/QAI.0000000000002839.

Abstract

Background: HIV protease inhibitors anti-Plasmodium falciparum activity in adults remains uncertain.

Methods: Adults with HIV CD4+ counts >200 cells/mm3 starting antiretroviral therapy (ART) with P. falciparum subclinical parasitemia (Pf SCP) were randomized 1:1 to (step 1) protease inhibitor lopinavir/ritonavir (LPV/r)-based (arm A) or nonnucleoside reverse transcriptase inhibitor (nNRTI)-based ART (arm B) for 15 days. In step 2, participants received nNRTI-based ART and trimethoprim/sulfamethoxazole prophylaxis for 15 days. P. falciparum SCP clearance was measured by polymerase chain reaction. The Fisher exact test [95% exact confidence interval (CI)] was used to compare proportions of P. falciparum SCP clearance (<10 parasites/μL on 3 occasions within 24 hours) between LPV/r and nNRTI arms at day 15. The Kaplan-Meier method and log-rank test were used to compare time-to-clearance.

Results: Fifty-two adults from Kenya, Malawi, and Uganda with a median age = 31 (Q1, Q3: 24-39) years, 33% women, with baseline median CD4+ counts of 324 (259-404) cells/mm3, median HIV-1 RNA viremia of 5.18 log10 copies/mL (4.60-5.71), and median estimated P. falciparum density of 454 parasites/μL (83-2219) enrolled in the study. Forty-nine (94%) participants completed the study. At day 15, there was no statistically significant difference in the proportions of P. falciparum SCP clearance between the LPV/r (23.1% clearance; 6 of the 26) and nNRTI (26.9% clearance; 7 of the 26) arms [between-arm difference 3.9% (95% CI, -21.1% to 28.4%; P = 1.00)]. No significant difference in time-to-clearance was observed between the arms (P = 0.80).

Conclusions: In a small randomized study of adults starting ART with P. falciparum SCP, no statistically significant differences were seen between LPV/r- and nNRTI-based ART in P. falciparum SCP clearance after 15 days of treatment.

Trial registration: ClinicalTrials.gov NCT01632891.

Publication types

  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • Anti-HIV Agents*
  • Female
  • HIV Infections* / complications
  • HIV Infections* / drug therapy
  • HIV Protease Inhibitors* / therapeutic use
  • Humans
  • Lopinavir
  • Male
  • Parasitemia / drug therapy
  • Plasmodium falciparum
  • Reverse Transcriptase Inhibitors / therapeutic use
  • Ritonavir

Substances

  • Anti-HIV Agents
  • HIV Protease Inhibitors
  • Reverse Transcriptase Inhibitors
  • Lopinavir
  • Ritonavir

Associated data

  • ClinicalTrials.gov/NCT01632891