J Natl Cancer I:维生素B6或可降低癌症风险?

2017-05-27 MedSci MedSci原创

2017年3月,发表在《J Natl Cancer Inst》的一项由意大利科学家进行的领域简介和Meta分析考察了维生素B6与癌症风险之间的相关性。背景:维生素B6牵涉到很多生化反应,可能在致癌作用中起到作用。研究人员总结了维生素B6和癌症风险相关的证据。方法:研究人员进行了一项观察性研究和干预性研究的系统评价。这些研究调查了维生素B6的摄入或磷酸吡哆醛(PLP)生物活性形式的血液水平与任何类型

2017年3月,发表在《J Natl Cancer Inst》的一项由意大利科学家进行的领域简介和Meta分析考察了维生素B6与癌症风险之间的相关性。

背景:维生素B6牵涉到很多生化反应,可能在致癌作用中起到作用。研究人员总结了维生素B6和癌症风险相关的证据。

方法:研究人员进行了一项观察性研究和干预性研究的系统评价。这些研究调查了维生素B6的摄入或磷酸吡哆醛(PLP)生物活性形式的血液水平与任何类型癌症风险之间的相关性。随机效应Meta分析用于计算各研究较高vs较低维生素摄入或PLP水平的汇总相对风险(RR)及其95%置信区间(CI)。研究人员也进行了随机效应剂量效应Meta分析。

结果:研究人员鉴别出121项观察性研究(参与者,1924506人,病例96436人)和9项随机对照试验(RCT;参与者,34911人,病例2539人),共涉及19个肿瘤部位。较高摄入膳食(仅食物)中的维生素B6与较低的所有癌症风险统计学显着相关(相对风险RR,0.78;95% CI,0.73~0.84),也与特异性肿瘤,尤其是胃肠道肿瘤相关(RR,0.68;95% CI,0.61~0.75)。较高PLP水平和所有癌症风险(RR,0.66;95% CI,0.58~0.76)和单一肿瘤部位,尤其是结果最一致的胃肠道肿瘤(RR,0.56;95% CI,0.48~0.65)之间负相关。癌症风险和维生素B6膳食摄入和PLP水平之间存在统计学显着的负线性关系。当考虑总(食物和补充)摄入时,该相关性较弱或无。RCT中的结果并不支持维生素B6对癌症的预防作用,但是该证据为低水平。

结论:流行病学研究支持维生素B6可作为癌症风险降低药物的潜力,以及PLP作为癌症筛查生物标志物的作用,尤其对于胃肠道肿瘤。但是,总摄入和干预性研究的不一致的结果表明,维生素B6也是其他膳食中保护性微量元素的指标。

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    2018-01-07 liye789132251
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    2017-10-21 qidongfanjian
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    2017-05-29 马龙

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