- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00046033
Comparing Standard-Dose Versus Adjusted-Dose Lopinavir/Ritonavir Therapy in HIV-Infected Persons With Drug Resistance
A Phase II, Randomized, Open-Label Study Comparing Fixed-Dose Versus Concentration-Adjusted Lopinavir/Ritonavir Therapy in HIV-Infected Subjects on Salvage Therapy
Aperçu de l'étude
Statut
Les conditions
Description détaillée
Antiretroviral drugs may fail to suppress HIV unless there are adequate amounts of those drugs in the blood. By monitoring the amounts of drugs in the blood and adjusting doses to achieve optimal drug concentrations, response to antiretroviral drugs may improve, especially in patients who have failed previous regimens. This study is designed to evaluate drug monitoring and dose adjustment of protease inhibitors (PIs) in heavily treatment-experienced patients.
Patients will be randomized to receive either a standard dose of LPV/r (Arm A) or a concentration-adjusted dose of LPV/r (Arm B). Concentration-adjusted dosing means that the dose of ritonavir or lopinavir may be increased based on the amount of lopinavir measured in the blood and the results of a drug resistance test. All patients start the study taking LPV/r, tenofovir disoproxil fumarate (TDF), 0 to 2 additional nucleoside reverse transcriptase inhibitors (NRTIs), and saquinavir (SQV) or amprenavir (APV). Only LPV/r, TDF, and SQV will be provided by the study. Other medications taken as part of the antiretroviral regimen must be obtained outside the study.
Patients in Arm A will take the usual approved dose of LPV/r for the first 24 weeks. At Week 24, patients with high viral loads will come to the clinic for a 12-hour LPV blood level measurement to see if the level of LPV needs to be increased. If it does, an additional capsule of ritonavir will be added to the regimen to boost the level of LPV.
Patients in Arm B will have a series of blood draws over a 12-hour period in the clinic, around 14 days after starting the study, to find out if their LPV level needs to be increased. If the LPV level needs to be raised, an additional capsule of ritonavir will be added to the regimen to boost the level of LPV. Patients who had their ritonavir dose adjusted will return to have another 12-hour blood draw around Week 5. If the LPV level still needs to be changed, an additional capsule of LPV/r will be added to the regimen. A third 12-hour blood draw will be performed around Week 8 if a second dose adjustment was necessary.
During the study, patients will visit the clinic weekly through Week 6, again at Week 8, then every 4 weeks thereafter through Week 32. Patients will have blood drawn at certain visits to test for LPV level, viral load, CD4 count, fasting lipids and glucose, and drug resistance.
Type d'étude
Inscription
Phase
- Phase 2
Contacts et emplacements
Lieux d'étude
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Florida
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Miami, Florida, États-Unis, 33136-1013
- Univ of Miami
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Hawaii
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Honolulu, Hawaii, États-Unis, 96816-2396
- Univ of Hawaii
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New York
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New York, New York, États-Unis, 10016
- NYU/Bellevue
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Ohio
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Cleveland, Ohio, États-Unis, 44106
- Case Western Reserve Univ
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Pennsylvania
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Pittsburgh, Pennsylvania, États-Unis, 15213-2582
- Univ of Pittsburgh
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Texas
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Galveston, Texas, États-Unis, 77555-0435
- Univ of Texas, Galveston
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-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- HIV-infection
- Viral load >= 5000 copies/ml within 45 days prior to study entry
- Documented reduction in LPV sensitivity based on results obtained within 45 days prior to study entry
- Prior experience with 2 or more NRTIs for at least 6 months each
- At least 12 weeks of stable antiretroviral treatment that includes at least one PI prior to study entry and may include TDF and/or T-20 for 8 weeks or more immediately prior to study entry
- Negative pregnancy test within 14 days prior to study entry
- Agree not to become pregnant or to impregnate and to use an acceptable form of contraception while receiving study drugs and for 4 weeks after stopping study drugs
Exclusion Criteria:
- Pregnant or breast-feeding.
- Certain drugs within 14 days prior to study entry
- Nonnucleoside reverse transcriptase inhibitors (NNRTIs) within 14 days prior to study entry
- History of intolerance to LPV/r, RTV, or TDF and/or their components
- Drug or alcohol use that, in the opinion of the investigator, would interfere with the study
- Require therapy and/or hospitalization due to a serious infection or medical illness that is potentially life-threatening within 14 days prior to study entry
- Any condition that, in the opinion of the investigator, would compromise ability to participate in the study
- Unexplained fever for 7 consecutive days or chronic diarrhea within 30 days prior to study entry
- Cancer requiring chemotherapy
- Any immune system drugs, HIV vaccine, or other experimental therapy within 30 days prior to study entry
- Plan to use any PI other than APV, SQV, or LPV/r in the initial study treatment
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Collaborateurs et enquêteurs
Les enquêteurs
- Chaise d'étude: Deborah McMahon, M.D., University of Pittsburgh
Publications et liens utiles
Publications générales
- Durant J, Clevenbergh P, Garraffo R, Halfon P, Icard S, Del Giudice P, Montagne N, Schapiro JM, Dellamonica P. Importance of protease inhibitor plasma levels in HIV-infected patients treated with genotypic-guided therapy: pharmacological data from the Viradapt Study. AIDS. 2000 Jul 7;14(10):1333-9. doi: 10.1097/00002030-200007070-00005.
- Kilby JM, Hill A, Buss N. The effect of ritonavir on saquinavir plasma concentration is independent of ritonavir dosage: combined analysis of pharmacokinetic data from 97 subjects. HIV Med. 2002 Apr;3(2):97-104. doi: 10.1046/j.1468-1293.2002.00090.x.
- Veldkamp AI, van Heeswijk RP, Mulder JW, Meenhorst PL, Schreij G, van der Geest S, Lange JM, Beijnen JH, Hoetelmans RM. Steady-state pharmacokinetics of twice-daily dosing of saquinavir plus ritonavir in HIV-1-infected individuals. J Acquir Immune Defic Syndr. 2001 Aug 1;27(4):344-9. doi: 10.1097/00126334-200108010-00004.
Dates d'enregistrement des études
Dates principales de l'étude
Achèvement primaire (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
- Infections par virus à ARN
- Maladies virales
- Infections
- Infections transmissibles par le sang
- Maladies transmissibles
- Maladies sexuellement transmissibles, virales
- Maladies sexuellement transmissibles
- Infections à lentivirus
- Infections à rétroviridae
- Syndromes d'immunodéficience
- Maladies du système immunitaire
- Infections à VIH
- Mécanismes moléculaires de l'action pharmacologique
- Agents anti-infectieux
- Agents antiviraux
- Inhibiteurs de la transcriptase inverse
- Inhibiteurs de la synthèse des acides nucléiques
- Inhibiteurs d'enzymes
- Agents anti-VIH
- Agents antirétroviraux
- Inhibiteurs de protéase
- Agents antibactériens
- Inhibiteurs du cytochrome P-450 CYP3A
- Inhibiteurs des enzymes du cytochrome P-450
- Inhibiteurs de la protéase du VIH
- Inhibiteurs de la protéase virale
- Agents antituberculeux
- Antibiotiques, Antituberculeux
- Ténofovir
- Ritonavir
- Lopinavir
- Amprénavir
- Saquinavir
Autres numéros d'identification d'étude
- ACTG A5135
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