多剤耐性結核のインドのコホートにおけるサイクロセリンの用量スケジュールの評価:集団の薬理学分析
Juan Eduardo Resendiz-Galvan1, Prerna R Arora2, Rohan V Lokhande2
1Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa.
Antimicrobial agents and chemotherapy
|September 2, 2025
まとめ
インドでは,多剤耐性結核 (MDR- TB) のサイクロセリンの投与量を調整する必要があるかもしれません. 効果的な薬剤濃度を達成するには,より高い用量が必要であり,観察されたより低い曝露レベルに関するさらなる研究が必要である.
科学分野:
- 薬理学
- 感染症
- 結核
背景:
- シクロセリンは多剤耐性結核 (MDR- TB) の治療に不可欠であり,薬剤濃度が最小抑制濃度 (MIC) を上回る状態を維持することに有効性が依存する.
- 大量のMDR- TBを患っているインド人のサイクロセリンの薬理動力学 (PK) データは限られている.
- 神経毒性は,サイクロセリンの治療に関連する濃度依存のリスクである.
研究 の 目的:
- MDR- TBのインド人集団におけるサイクロセリンの薬動性を特徴づける.
- 治療目標を達成し,毒性を最小限に抑えるための最適な用量戦略を決定する.
主な方法:
- インドのムンバイでMDR- TBを治療するサイクロセリンを投与した180人の成人と青少年を対象とした前向きなコホート研究.
- データを分析するためにシリアルPKサンプリングと非線形混合効果モデリングを使用した.
- 無脂肪質量によるアロメトリックスケーリングと血清クレアチニンの含有により,改善されたPKモデルフィット.
主要な成果:
- シクロセリンのPKは,脂肪のない質量でスケールされたトランジットコンパートメント吸収による1コンパートメントモデルで最もよく記述されました.
- 典型的な腎的および非腎的クリアランスはそれぞれ0. 589L/ hおよび0. 901L/ hと推定された.
- シミュレートされた中位曝露 (308 mg·h/ L) は,毎日2回250 mgで報告された値より低かったため,有効性の目標を達成するためにより高い用量 (500 - 750 mg BID) が必要であることを示唆している.
結論:
- 現在のサイクロセリンの投与は,インド人のMDR- TB患者において,サブセラピュティックな曝露を引き起こす可能性があります.
- MIC以上の目標時間を達成するために,二回500~750 mgの投与が推奨されます.
- この集団におけるサイクロセリンの低暴露の理由を理解するために,さらなる調査が必要である.
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