Am J Gastroenterol:腹部内脏型肥胖增加肠易激综合征发病风险

2015-01-28 MedSci MedSci原创

腹部脂肪根据区域分布的不同可分为内脏脂肪组织(visceral adipose tissue,VAT)和皮下脂肪组织(subcutaneous adipose tissue,SAT)。已有研究证实,肥胖与一些胃肠疾病有相关性,如糜烂性食管炎、结肠癌、食管癌和胆囊疾病等。但肥胖与肠易激综合征(IBS)的关系还不清楚。 为研究腹部内脏脂肪与IBS发病风险的关系,来自韩国东国大学的Lee CG教授

腹部脂肪根据区域分布的不同可分为内脏脂肪组织(visceral adipose tissue,VAT)和皮下脂肪组织(subcutaneous adipose tissue,SAT)。已有研究证实,肥胖与一些胃肠疾病有相关性,如糜烂性食管炎、结肠癌、食管癌和胆囊疾病等。但肥胖与肠易激综合征(IBS)的关系还不清楚。

为研究腹部内脏脂肪与IBS发病风险的关系,来自韩国东国大学的Lee CG教授等开展一项病例对照研究,成果发表于最近的AJG杂志。

该研究选取2012年1月-2013年8月在健康促进中心曾做腹部CT检查的人群,通过电话随访,根据罗马Ⅲ标准诊断IBS,再将IBS 组与对照组的VAT区域进行对比。通过评估VAT、SAT、VAT/SAT、BMI和腰围来研究腹部内脏肥胖与IBS的关系。同时,Lee教授还研究了内脏肥胖与反流性食管炎的关系。共534人曾做腹部CT检查,研究者排除了8例有下消化道器质性疾病的患者,对526人做了电话随访,最后336人同意参加研究。

共诊断IBS 67例(19.9%),其中腹泻型IBS31例(9.2%),便秘型IBS27例(8.3%),混合型IBS9例(2.7%)。VAT与总脂肪组织(TAT)通过CT测量。(见图1)

2.jpg

        图1、如何测量VAT如图示:(a)VAT;(b)TAT。CT采用容积再现和感兴趣区域相结合。SAT则通过TAT区域减去VAT区域得出。

通过单因素分析得出,IBS组的VAT区域、VAT/SAT、腰围,反流性食管炎发病率以及女性患者比例显著高于对照组。通过多因素分析 得出,VAT区域、VAT/SAT和腰围与IBS发病风险呈独立相关。对于腹泻型IBS,内脏脂肪会增加IBS发病风险。

针对内脏脂肪与IBS呈相关关系的机制,Lee教授提出了自己的看法:1、内脏脂肪位于腹腔内,过多的内脏脂肪堆积可能增加腹腔内压,继 而影响肠道动力。2、内脏脂肪会分泌一系列的脂肪素和细胞因子,可能是引起IBS患者上皮细胞的分泌异常和内脏高敏感性的原因。3、肠道微生物的改变也参 与其中。(见图2)

4.jpg

        图2、内脏脂肪可能通过机械和代谢两方面作用导致IBS发病。肠道微生物的改变可能同时影响内脏脂肪和IBS。

原始出处:

Lee CG, Lee JK, Kang YS, Shin S, Kim JH, Lim YJ, Koh MS, Lee JH, Kang HW.Visceral Abdominal Obesity Is Associated With an Increased Risk of Irritable Bowel Syndrome.Am J Gastroenterol. 2015 Jan 13. doi: 10.1038/ajg.2014.422.

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    2015-05-25 许安
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    2015-02-11 仁者大医
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    2015-02-23 orthoW

    不错的文章,学习了

    0

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SCIENCE:揭开安慰剂治疗的假面

对于那些安慰剂组在临床试验中出现巨大改善的疾病,尤其是疼痛、抑郁和其他精神疾病,克服假性治疗是一个现实障碍。 Kathryn Hall的早期职业生涯建立在药物,而非安慰剂上。作为一名分子生物学家,她在千年制药公司花费了两年时间识别药物靶点。2005年,她到针灸医生诊所寻找能缓解其腕管综合征的方法。“我记得自己坐在那里思考,我无法相信我在做这个。这太荒谬了。”她说。

Am J Gastroenterol:腹部内脏肥胖可增加肠易激综合征患病风险

近日,韩国东国大学医学院Ilsan医院内科的研究人员进行了一项病例对照研究,发现腹部肥胖可增加肠易激综合征患病风险,最新研究成果在线发表于1月13日的Am J Gastroenterol杂志上。