JGH:处于疾病缓解期的溃疡性结肠炎患者停用5-氨基水杨酸不会增加疾病复发风险

2022-03-30 MedSci原创 MedSci原创

5-氨基水杨酸(5-ASA药物名称为马沙拉嗪,Masalazine)是重要的医药和染料化工原料,也是一种治疗慢性结肠炎药物柳氨磺吡啶的主要原料,其本身也具有相似的治疗作用。

早在20世纪40年代科学家就观察到水杨酸-柳氮磺胺吡啶(SASP)在治疗类风湿关节炎的时候,合并的结肠炎也得到改善。直到1977年Hanauer等才明确了柳氮磺胺吡啶中治疗溃疡性结肠炎的有效成分是5-氨基水杨酸 (5-ASA)。柳氮磺吡啶的不良反应主要是磺胺引起的,因此人们不断地研发出各式各样的提纯的5-氨基水杨酸来治疗炎症性肠病。5-氨基水杨酸无论在诱导期和维持期, 都是溃疡性结肠炎的首选治疗药物。具体使用方式、剂量与疾病的分型、分度等有密切关系。

一般的说,对于活动期轻中度溃疡性结肠炎患者,口服美沙拉嗪(剂量2-4.8 g/天) 作为一线药物诱导缓解。对于维持期,剂量一般2-3g/天,并补充叶酸,维持疗程为3-5年或长期维持。但是稳定性溃疡性结肠炎 (UC) 患者是否可以停用 5-氨基水杨酸 (ASA) 尚不清楚。因此,本项研究旨在评估是否可以在无皮质类固醇临床缓解≥1年的 UC 患者中安全地停用 5-ASA。

 

这是一项使用香港全港医疗保健数据库的回顾性队列研究。主要观察结果是发生UC发作,其定义为UC患者在5年内使用新的皮质类固醇或与UC相关的住院治疗。UC 患者每天口服5-ASA ≥2gm ≥1 年,C反应蛋白 (CRP) <10mg/dL,过去一年未增加 5-ASA 剂量、UC 相关住院或使用皮质类固醇。如果在随访期内停用 5-ASA ≥ 90 天,则患者被归类为“停止”。最后进行了多变量 Cox 回归模型,调整了人口统计学、血液参数和使用的免疫抑制剂对于研究的干扰。

本项研究最后共纳入 1,408 名患者,中位随访时间为 41.8 个月 [四分位距 (IQR):17.2-60.0 个月]。研究结果显示:停止 5-ASA 的使用与 UC 复发风险增加无关(aHR 0.91;95% CI 0.64 – 1.31;p=0.620)。停止 5-ASA 时较高的 CRP 水平(aHR 1.15;95% CI:1.01 – 1.30;p=0.037)与发作风险增加相关。

综上,研究人员总结道在无糖皮质激素缓解期≥1 年的 UC 患者中停止 5-ASA 与复发风险增加无关,因此,未来的前瞻性试验应评估停止 5-ASA 在稳定 UC 患者中的作用。

原始出处:

Joyce WY Mak. Et al. Stopping 5-Aminosalicylic Acid in Ulcerative Colitis Patients in Corticosteroid-free remission is not associated with Increased Risk of Flare: A Territory-wide population-based cohort study. .2022.JGH.

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    2022-11-15 nymo
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溃疡性结肠炎是一种病因尚不十分清楚的结肠和直肠慢性非特异性炎症性疾病,病变局限于大肠黏膜及黏膜下层。