リウマチ性関節炎における口服メトトレキサートの分割 vs 単一投与: ランダム化制御試験 (SMART研究)
Chandra Bhushan Prasad1, Varun Dhir2, Ranjan Gupta3
1Division of Clinical Immunology and Rheumatology, Department of Internal Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
Clinical rheumatology
|August 29, 2025
まとめ
単回投与と比較して,経口メトトレキサートの分割投与は,リウマチ性関節炎患者の16週間の臨床反応と有効性をより迅速に示した. この治療法は24週間の全般的な有効性にもかかわらず,追加的な疾患変異性抗レウマティック薬の必要性を減少させた.
科学分野:
- リウマトロジ
- 臨床薬理学
- 薬学経済学
背景:
- 薬理学的なデータによると,分量投与による経口メトトレキサートは,生物学的利用性を高める可能性がある.
- リウマチ性関節炎 (RA) の治療におけるメトトレキサートの分割投与の有効性を支持する臨床的証拠は不足しています.
- この研究は,RA患者における分割投与と単一投与の経口メトトレキサートの臨床効果を比較することを目的とした.
研究 の 目的:
- 有効性のある関節リウマチ患者における分量投与と単回投与による経口メトトレキサートの臨床反応を比較する.
- 異なる経口メトトレキサート投与戦略の有効性と安全性を評価する.
主な方法:
- インドの6つの大学病院で253人のHIV陽性RA患者さんを対象とした実用的でオープンなランダム化制御試験です.
- 患者はランダムに分割投与 (15 mg 朝, 10 mg 夕方) または単一投与 (25 mg) の経口メトトレキサートを毎週16週間投与された.
- 主要アウトカムは24週でEULAR良好な反応であり,主要二次アウトカムは16週でEULAR良好な反応であった. 治療意図の分析が行われました.
主要な成果:
- 24週間のEULAR良好な反応におけるメトトレキサートの分割投与と単一投与の有意な差は認められませんでした (p=0. 263).
- 16週目にメトトレキサートの分割投与で,EULAR良好な反応が著しく高かった (p=0. 008).
- 16週目に第二のDMARDが必要になった患者は少なかった (p=0. 003),しかし,数値的に高いトランスアミニティスと不耐性が認められた.
結論:
- 単一投与と比較して,24週間の最初の結果を達成しなかったにもかかわらず,分量投与による経口メトトレキサートはより迅速な有効性を示し,追加のDMARDの必要性を減少させた.
- この研究は,経口メトトレキサートの分量投与がRAにおける短期効果の改善を証明しています.
- 分量投与では不耐症とトランザミニティスの割合が増加した.
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