DDW 2013:二甲双胍或降低糖尿病患者结直肠癌风险

2013-05-27 佚名 EGMN

  奥兰多——在消化疾病周(DDW)上发表的一项Meta分析显示,二甲双胍可能与2型糖尿病患者的结直肠癌(CRC)风险降低有关。   罗切斯特梅奥医院的Siddharth Singh医生报告称,磺酰脲类和胰岛素均与CRC风险降低无关,反而显示出风险增加的不显著趋势。未观察到CRC与噻唑烷二酮(TZD)类药物之间有关。   糖尿病是明确的CRC危险因素,而且临床前和观察性研究已显示,抗糖尿病药物

  奥兰多——在消化疾病周(DDW)上发表的一项Meta分析显示,二甲双胍可能与2型糖尿病患者的结直肠癌(CRC)风险降低有关。

  罗切斯特梅奥医院的Siddharth Singh医生报告称,磺酰脲类和胰岛素均与CRC风险降低无关,反而显示出风险增加的不显著趋势。未观察到CRC与噻唑烷二酮(TZD)类药物之间有关。

  糖尿病是明确的CRC危险因素,而且临床前和观察性研究已显示,抗糖尿病药物可能影响CRC风险。但不同降糖药物对CRC风险影响的差异并不明确。

  Singh医生及其同事对15项评估降糖药物与CRC风险关联的研究进行了系统综述和Meta分析。各项研究之间存在明显异质性。具体包括5项病例对照研究、8项队列研究和2项随机对照试验,共涉及841,000例糖尿病患者中发生的近14,000例CRC。

  分析结果显示,接受二甲双胍治疗者的CRC发病率降低了10%[10项研究;校正比值比(AOR),0.90;95%置信区间(CI),0.82~0.99;P=0.02]。即使仅分析高质量的观察性研究(7项研究;AOR,0.88;95%CI,0.79~0.98),仍然得出一致的结果。

  使用磺酰脲类(8项研究;AOR,1.12;95%CI,0.99~1.26;P=0.07)或胰岛素(10项研究;AOR,1.25;95%CI,0.91~1.71;P=0.17)的患者具有较高的CRC风险,不过均不具有统计学意义。

  TZD与CRC风险无关(6项研究;AOR,0.95;95%CI,0.87~1.03;P=0.24)。

  Singh医生认为,值得开展前瞻性队列研究或随机对照试验来评估二甲双胍对于成年2型糖尿病患者的化学预防效应。

  这项Meta分析的主要局限性在于,具有显著性的结果仅见于观察性研究,而未见于随机对照试验的事后分析。而且存在多项残余混杂因素,包括没有校正肥胖、糖尿病指征和严重程度等。

Metformin appears to be associated with reduced colorectal cancer risk
Metformin may be associated with a reduced risk of colorectal cancer in patients with type 2 diabetes, according to a meta-analysis that included mostly observational studies.
Sulfonylurea and insulin were not associated with a reduced risk and showed a nonsignificant trend toward a higher risk for colorectal cancer (CRC). No association was noted between CRC and thiazolidinedione (TZD), Dr. Siddharth Singh reported at the annual Digestive Disease Week...

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    2014-05-11 sjq027
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    2013-05-29 aids214
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