炎症性腸疾患における肝線維症および脂肪肝:横断的マッチドコントロール法を用いた肝硬度測定研究(ELASTIBD)
Besim Fazil Agargun1, Ibrahim Volkan Senkal1, Aynura Rustamzada1
1Istanbul Faculty of Medicine- Istanbul University, Division of Gastroenterohepatology- Department of Internal Medicine, Istanbul, Turkey.
まとめ
炎症性腸疾患(IBD)患者は、対照群と比較して有意に高い肝線維症および脂肪肝の有病率を示します。抗TNF療法は線維症のリスクを低減する可能性がありますが、コルチコステロイドの使用はIBD患者における線維症のリスク増加と関連しています。
科学分野:
- 消化器病学および肝臓病学; 炎症性腸疾患(IBD)研究; 肝疾患疫学
背景:
- 代謝機能障害関連脂肪肝疾患(MASLD)および肝線維症は、炎症性腸疾患(IBD)の腸管外合併症としてますます認識されている。これらの肝疾患の正確な有病率と、IBD治療薬が肝臓の健康に及ぼす影響については、さらなる調査が必要である。
研究 の 目的:
- IBD患者における肝脂肪症および線維症の有病率を、マッチさせた対照群と比較して決定すること。肝線維症および脂肪肝の存在と、IBD治療薬、特に抗TNF製剤およびコルチコステロイドとの関連を調査すること。
主な方法:
- IBD患者358名および個人マッチングされた対照群358名を含む横断研究。肝脂肪症および線維症の評価には、振動制御式肝硬度測定法(VCTE; FibroScan)を使用した。進行中のELASTIBDコホートからのベースラインデータを解析した。
主要な成果:
- IBD患者は対照群と比較して、有意な線維症(12.3% vs 4.2%)および脂肪肝(41.4% vs 28.3%)の有病率が有意に高かった。抗TNF療法は線維症のオッズを低下させ(aOR 0.39)、コルチコステロイドの使用は線維症のオッズを増加させた(aOR 1.41)。高齢と高いBMIは、肝線維症の追加予測因子として特定された。
結論:
- IBD患者は対照群と比較して、線維症で3倍、脂肪肝で2倍の増加を示しており、IBDケアにおける肝臓評価の必要性を強調している。抗TNF療法と線維症の逆相関は、炎症を制御することが肝臓の線維化発生を軽減する可能性を示唆している。肝転帰に対する疾患進行および治療影響を解明するため、ELASTIBDコホートのさらなる追跡調査が必要である。
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