関連する実験動画
ワルファリン投与量 (CoumaGen-II) を個別化するための2つの薬剤遺伝的アルゴリズムと標準的なケアを比較したランダム化および臨床有効性試験
Jeffrey L Anderson1, Benjamin D Horne, Scott M Stevens
1Intermountain Medical Center, Cardiovascular Department, Murray, UT 84107-5701, USA. jeffrey.anderson@imail.org
Circulation
|March 21, 2012
まとめ
薬剤遺伝学 (PG) は,範囲外の国際標準化比率と有害事象を減らすことにより,ワルファリン投与量を改善します. シンプルな1段階のPGアルゴリズムは,3段階のアルゴリズムと同じくらい効果があり,より広範な臨床使用が示唆されています.
科学分野:
- ファルマコゲノミクスとは
- 臨床薬理学 臨床薬理学とは
- 薬剤の投与量の最適化について
背景:
- ワルファリンの投与量は,個々の変動性と狭い治療ウィンドウのために課題を提示します.
- 薬剤遺伝学 (PG) は,ワーファリンの投与効率と安全性を向上させる可能性を秘めています.
- 現在,PG誘導ワルファリン療法に対する限られた臨床試験の証拠が存在する.
研究 の 目的:
- 標準ワルファリン投与に対する2つの薬剤遺伝学アルゴリズム (1段階および3段階) の有効性を比較する.
- ワルファリン治療の個別化における薬物遺伝学の臨床的有用性を評価する.
主な方法:
- ランダム化試験 (N=504) では,2つのPGアルゴリズム (PG-1とPG-2) を比較した.
- 臨床効果試験 (N=1866) で,PGガイドラインと標準投与を比較した.
- CYP2C9とVKORC1の同日のゲノタイプ化が行われました.
- 主なアウトカムには,範囲外の国際標準化比率の割合と治療範囲内の時間が含まれていました.
主要な成果:
- 3段階のPGアルゴリズム (PG-2) は,1段階のPGアルゴリズム (PG-1) よりも劣らず優れていました.
- 併用PGガイドラインは,標準投与と比較して,範囲外の国際標準化比率を大幅に低下させた (31% vs. 42% 1ヶ月; 30% vs. 42% 3ヶ月).
- PGガイドラインは,治療範囲の時間を増加させ (1ヶ月で69%対58%;3ヶ月で71%対59%),重篤な有害事象を減少させ (4.5%対9.4%).
結論:
- ワルファリンの薬剤遺伝的用量は,より広範な臨床適用のために考慮されるべきである.
- より単純な1段階のPGアルゴリズムは,3段階のアルゴリズムと同等の有効性を示しました.
- 主要なランダム化試験におけるさらなる検証は進行中です.
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