Efficacy and Safety of Tenofovir DF/Atazanavir Enhanced With Low Dose of Ritonavir in HIV-Infected Patients
Randomized Open Label Study Assessing the Antiviral Activity, Toxicity and Pharmacologic Interaction of Tenofovir DF/Atazanavir Enhanced With Low Dose of Ritonavir as Part of a Salvage Regimen in HIV Infected Patients With Multiple Treatment Failures (ANRS 107 Trial PUZZLE 2)
調査の概要
詳細な説明
When licensed, new drugs are widely used in patients failing antiretroviral therapy, including patients with multiple failures. In such patients, having multi-resistant virus, the introduction of one new drug only in the salvage regimen will infrequently result in undetectable virus load in the plasma. Tenofovir DF and atazanavir appear promising because of their pharmacokinetic profile, activity, safety and resistance properties. In addition, pharmacokinetic data in healthy volunteers suggest that atazanavir could be optimized by adding ritonavir at low dose. Thus, one may speculate that atazanavir pharmacokinetic and antiviral activity could be optimized by adding ritonavir at low dose in patients exhibiting high rate of protease inhibitor mutations.
This protocol is aimed at studying the antiviral activity, toxicity and PK interactions, of tenofovir DF and atazanavir enhanced with low dose of ritonavir given alone and then concomitantly as part of a salvage regimen to patients with multiple failure, under conditions allowing to tease out the specific role of atazanavir combined with low dose of ritonavir.
EKG abnormalities (increased PR and QTc intervals) were observed in normal volunteers treated with atazanavir, therefore EKG safety monitoring will be performed on all subjects during this study
研究の種類
入学
段階
- フェーズ2
連絡先と場所
研究場所
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Paris、フランス、75015
- Service d'Immunologie clinique Hopital Europeen Georges Pompidou
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Males and non pregnant females 18 years of age and older who have confirmed laboratory diagnosis of HIV infection and documented failure (plasma HIV RNA level over 10,000 copies/ml) to at least two protease inhibitors (ritonavir [RTV] must have been given at a dose over 400 mg twice a day (bid), in order to qualify for a protease inhibitor in this study) and one non-nucleoside reverse transcriptase inhibitor (NNRTI)
- Ongoing antiretroviral therapy at inclusion without change within the last month
- No threshold of CD4 cell count
- Patients naive of atazanavir and tenofovir DF
Exclusion Criteria:
- Cardiomyopathy
- QTc interval over 450 msec and pause length over 3 seconds on screening EKG
- Heart rate below 40 bpm
- Third degree heart block, and clinical symptoms potentially related to heart block
- Ongoing immunotherapy including IL2, interferon or HIV specific vaccine
- Ongoing opportunistic infection
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:なし(オープンラベル)
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
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Change in plasma HIV RNA level and percentage of patients with undetectable HIV-RNA in plasma at Week 26
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二次結果の測定
結果測定 |
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Tolerance during the study
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Changes in CD4+ counts at week 26
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Emergence of drug-resistant viruses
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Rate of virus decay in plasma in group 2 during the initial phase (14 days) of therapy according to baseline EC50 of atazanavir
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Pharmacokinetic (PK) profile of atazanavir alone at day 14
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Blood samples prior to drug administration (Cmin) and after drug administration on day 14 at +1h, +2h, +3h, +5h, +8h, and +24h in 10 patients of group 2
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PK assessment on Week 6, of atazanavir, after 4 weeks of co-administration with tenofovir DF. (Blood samples prior to drug administration (Cmin) and after drug administration at +1h, +2h, +3h, +5h, +8h, and +24h in the same 10 patients of group 2)
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協力者と研究者
捜査官
- スタディチェア:Jean Pierre Aboulker, MD、Inserm SC10
- 主任研究者:Christophe Piketty, MD、Hopital Européen Georges Pompidou Paris, service d'immunologie clinique
出版物と役立つリンク
一般刊行物
- Piketty C, Gerard L, Chazallon C, Calvez V, Clavel F, Taburet AM, Girard PM, Aboulker JP; ANRS 107 Puzzle 2 Study Group. Virological and immunological impact of non-nucleoside reverse transcriptase inhibitor withdrawal in HIV-infected patients with multiple treatment failures. AIDS. 2004 Jul 2;18(10):1469-71. doi: 10.1097/01.aids.0000131340.68666.21.
- Taburet AM, Piketty C, Chazallon C, Vincent I, Gerard L, Calvez V, Clavel F, Aboulker JP, Girard PM. Interactions between atazanavir-ritonavir and tenofovir in heavily pretreated human immunodeficiency virus-infected patients. Antimicrob Agents Chemother. 2004 Jun;48(6):2091-6. doi: 10.1128/AAC.48.6.2091-2096.2004.
研究記録日
主要日程の研究
研究開始
研究の完了
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
- ANRS 107 Puzzle 2
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