臨牀消化器内科 Vol.22 No.12(7-5)


特集名 炎症性腸疾患におけるAZA/6-MPの役割
題名 ステロイド依存性/抵抗性炎症性腸疾患におけるAZA/6-MPと他の治療法との比較 (5) 抗菌薬多剤併用ATM療法
発刊年月 2007年 11月
著者 大草 敏史 順天堂大学医学部消化器内科
著者 齋藤 紘昭 順天堂大学医学部消化器内科
著者 原田 章 順天堂大学医学部消化器内科
著者 別府 加寿子 順天堂大学医学部消化器内科
著者 渋谷 智義 順天堂大学医学部消化器内科
著者 坂本 直人 順天堂大学医学部消化器内科
著者 長田 太郎 順天堂大学医学部消化器内科
著者 渡辺 純夫 順天堂大学医学部消化器内科
【 要旨 】 炎症性腸疾患の発症と増悪に腸内細菌が関与していることが明らかになってきているが,われわれは,潰瘍性大腸炎 (UC) の病変粘膜の培養分離細菌の病原性を検討し,腸内細菌のFusobacterium varium (F. varium) という嫌気性菌がUCの原因または増悪因子の一つと特定し,そのF. variumを除菌する治療法として抗菌薬多剤併用ATM療法を開発した.そして,難治性であるステロイド依存性UC 61例を対象にATM療法を試行したところ,2週間投与終了後から3ヵ月後までに82 % (50 / 61) で症状スコアの改善がみられ,3ヵ月後までの緩解導入率は75 % (46 / 61),12ヵ月後という長期の緩解維持率は,61 % (37 / 61) という良好な結果を得た.ネフローゼ症候群で中止できない1例を除くと,ステロイド離脱率は62 % (37 / 60)であった.副作用は29例 (48 %) にみられたが,いずれも軽症で重篤な副作用はなかった.服薬コンプライアンスも平均98.7 % (43 - 100 %)と良好であった.ステロイド離脱率について,本治療法はアザチオプリン (AZA) / 6-メルカプトプリン (6-MP) 療法と比べてほぼ同等の成績であり,有望な新治療法と考えられた.
Theme Role of AZA/6-MP in the Treatment of Inflammatory Bowel Disease
Title Comparative Effect of Other Treatments with AZA/6-MP in the Steroid Dependent / Resistant Inflammatory Bowel Disease -- Antibiotic Combination ATM Therapy
Author Toshifumi Ohkusa Department of Gastroenterology, Juntendo University School of Medicine
Author Hiroaki Saito Department of Gastroenterology, Juntendo University School of Medicine
Author Akira Harada Department of Gastroenterology, Juntendo University School of Medicine
Author Kazuko Beppu Department of Gastroenterology, Juntendo University School of Medicine
Author Tomoyoshi Shibuya Department of Gastroenterology, Juntendo University School of Medicine
Author Naoto Sakamoto Department of Gastroenterology, Juntendo University School of Medicine
Author Taro Osada Department of Gastroenterology, Juntendo University School of Medicine
Author Sumio Watanabe Department of Gastroenterology, Juntendo University School of Medicine
[ Summary ] We previously reported that Fusobacterium varium may be one of the pathogenic factors contributing to ulcerative colitis (UC), and that an antibiotic combination therapy against F. varium is effective for active UC. Herein, we assessed whether antibiotic combination therapy is effective for induction and maintenance of remission of UC patients who were dependent on steroids. We enrolled 61 steroid-dependent active UC patients (median age, 36, range, 16 - 73 years, male / female : 41 / 20) whose relapse had occurred during reduction of prednisolone to below 15 mg / day and who were unable to be weaned off steroids without clinical relapse. The patients received amoxicillin 500 mg tds, tetracycline 500 mg tds and metronidazole 250 mg tds for two weeks. We selected these three antibiotics because F. varium was sensitive to them. Sulfasalazine, 5-aminosalicylic acid, prednisolone and / or probiotics being taken at stable dosages for a set time period prior to study inclusion were continued. Symptom assessment (score < 6 indicating clinical remission) and colonoscopic evaluations were performed on a blind before enrollment, as well as at 3 and 12 months after treatment. Fifty of 61 steroid-dependent patients (82 %) showed improvement within 3 months. At 3 and 12 months, 75 % and 61 %, respectively, of steroid-dependent patients were in remission. In the steroid-dependent group, 37 of 60 patients (62 %) were able to stop steroid therapy and maintain remission for 3 months. One patient was excluded from this study because he had nephrosis and could not stop steroid therapy. Four (6.6 %) steroid-dependent patients underwent colectomies. No serious drug related toxicity was observed during the trial. Mean compliance with the antibiotic treatment was 98 % (43 - 100 %). Total colonoscopic findings in both groups showed improvement at 3 and 12 months after treatment (Table 2, p < 0.0001 by Friedman test). The two week antibiotic combination ATM therapy was effective and safe in patients with active ulcerative colitis dependent on steroids in this multicenter, long term follow up study.
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