Gut:钙摄入高 结直肠癌风险低?

2018-08-20 王淳 环球医学

2018年8月,发表在《Gut》的一项由中国、美国、日本和韩国学者进行的分析,考察了影响钙摄入的原因及是否与结直肠癌风险存在因果关系。

2018年8月,发表在《Gut》的一项由中国、美国、日本和韩国学者进行的分析,考察了影响钙摄入的原因及是否与直肠癌风险存在因果关系。

目的:虽然证据表明,钙摄入和直肠癌风险具有负相关性,但其机制仍然未知。钙敏感受体(CASR)在正常结肠上皮中大量表达,且会影响癌变。研究人员假设,钙摄入与较低的CASR阳性而非阴性的结直肠癌风险的降低相关。

设计:使用免疫组化,研究人员评估了从护士健康研究和卫生专业人员随访研究的136249名研究对象中发展成结肠癌和直肠癌的779名病例的肿瘤CASR蛋白表达情况。复制方法Cox成比例风险回归分析,用于评估不同CASR状态下的钙摄入与结直肠腺癌亚型发生率之间的相关性。

结果:总体钙摄入与结直肠癌风险负相关(P=0.01;≥1200?vs<600mg/d:多变量风险比[HR],0.75;95% 置信区间[CI],0.60~0.95)。对于相同比较,较高的总体钙摄入与较低的CASR阳性肿瘤风险相关(P=0.003;多变量HR,0.67;95%CI,0.51~0.86),但是与CASR阴性肿瘤不相关(P=0.67;多变量HR,1.15;95%CI,0.75~1.78;CASR亚型间的P异质性=0.06)。不论性别、肿瘤位置和钙的来源,钙摄入与CASR阳性而非阴性肿瘤的强负相关性一般保持一致。

结论:分子病理流行病学数据表明,较高的钙摄入与较低的结直肠癌风险存在因果关系,以及CASR在介导钙的抗肿瘤作用中起到潜在的作用。

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    2019-06-28 sjq027
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    2018-08-20 三不猴

    学习啦

    0

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    2018-08-20 易水河

    这是个问题

    0

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