Diabetes Care:血中脂多糖(LPS)与糖尿病和肥胖密切相关

2013-07-18 完美事业 dxy

阐明肥胖和2型糖尿病的触发因素以改善患者治疗是极其重要的。已证明减肥手术能够预防甚至是治疗糖尿病,但是其作用机制未知。脂多糖(LPS)水平升高可预测糖尿病发生率,但是LPS的来源不甚清楚。为了评价血浆LPS对经减肥手术治疗的患者腹部肥胖和血糖控制的潜在影响,来自挪威奥斯陆大学医院传染病和微生物部的Troseid博士等人进行了一项研究,研究发现证明肠道细菌易位是肥胖和糖尿病的潜在触发因素,并表明减肥

阐明肥胖和2型糖尿病的触发因素以改善患者治疗是极其重要的。已证明减肥手术能够预防甚至是治疗糖尿病,但是其作用机制未知。脂多糖(LPS)水平升高可预测糖尿病发生率,但是LPS的来源不甚清楚。为了评价血浆LPS对经减肥手术治疗的患者腹部肥胖和血糖控制的潜在影响,来自挪威奥斯陆大学医院传染病和微生物部的Troseid博士等人进行了一项研究,研究发现证明肠道细菌易位是肥胖和糖尿病的潜在触发因素,并表明减肥手术的抗糖尿病作用机制可能与血浆LPS水平降低有关,甚至可能是LPS降低所导致的结果。研究结果在线发表于2013年7月8日的美国《糖尿病治疗》(Diabetes Care)杂志上。

这是一项对49名行减肥手术的连续肥胖患者和17名对照者进行的前瞻性观察研究。主要评价指标为血浆LPS,HbA1c,脂肪组织体积(采用计算机断层扫描术测定),同时对脂肪组织室隔中的细菌DNA进行定量。

结果显示,与对照者比较,肥胖个体血浆LPS含量升高(P<0.001),经减肥手术后LPS含量降低(P=0.001)。LPS水平与HbA1c(r=0.56, P=0.001)和腹内脂肪体积(r=0.61,P<0.001)密切相关,但是与皮下脂肪体积仅中等相关(r=0.33, P=0.038)。此外,从肠系膜到大网膜再到皮下脂肪组织室隔,细菌DNA水平呈梯度降低趋势(2倍)。最后要说的是,减肥手术后LPS水平降低与HbA1c降低直接相关(r=0.85,P<0.001)。

该研究发现支持肠道细菌易位是肥胖和糖尿病的潜在触发因素这一假设,同时表明减肥手术的抗糖尿病作用机制可能与血浆LPS水平降低有关,甚至可能是LPS降低所导致的结果。


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