title: [Lopinavir/ritonavir monotherapy for the treatment of HIV-1 infection: the emergence of resistance].
abstract: Treatment with lopinavir/ritonavir (LPV/r) monotherapy has been shown to be an effective alternative, especially in the maintenance of patients previously treated with combination therapy and prolonged virological suppression. LPV/r monotherapy is associated with a greater number of low-level viremia episodes than combination therapy, without resistance mutations being detected in the majority of patients. The incidence of the development of major resistance mutations in the OK pilot and OK04 studies was very low: 0.51 per 100 patients-year, and was mainly related to mutations in positions 46, 54 and 82, which have not compromised other therapeutic options. The contribution of low-level resistance mutations to loss of virological control seems small, and no different from that observed in combination therapy. However, this phenomenon should be studied in larger, long-term trials.
authors: Laboratorio de Microbiología Molecular, Servicio de Microbiología, Hospital Universitario 12 de Octubre, Madrid, España. rdelgado.hdoc@salud.madrid.org
authors: Rafael
authors: R
authors: Delgado
mesh_terms: D019380:Anti-HIV Agents / Q000494:pharmacology; D002986:Clinical Trials as Topic / Q000706:statistics & numerical data; D004338:Drug Combinations; D024921:Drug Resistance, Multiple, Viral / Q000235:genetics; D015658:HIV Infections / Q000188:drug therapy* / Q000821:virology; D016333:HIV Protease / Q000235:genetics; D017320:HIV Protease Inhibitors / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D015497:HIV-1 / Q000187:drug effects* / Q000235:genetics; D006801:Humans; D015994:Incidence; D061466:Lopinavir; D020125:Mutation, Missense; D010865:Pilot Projects; D017354:Point Mutation; D011744:Pyrimidinones / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data; D019438:Ritonavir / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D014766:Viremia / Q000188:drug therapy / Q000453:epidemiology
chemical_list: D019380:Anti-HIV Agents; D004338:Drug Combinations; D017320:HIV Protease Inhibitors; D011744:Pyrimidinones; D061466:Lopinavir; D016333:HIV Protease; C514803:p16 protease, Human immunodeficiency virus 1; D019438:Ritonavir