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J Renal Nutr:低磷饮食可改善肠道微生物菌群,慢性肾病患者或可参考!

2021-11-03 MedSci原创 MedSci原创

低磷饮食可重塑肠道微生物群,这为健康人低磷饮食的益处提供了信息,并进一步为慢性肾病患者的饮食指导提供了重要的线索。

在过去几十年中,随着蛋白质摄入量的增加和无机磷酸盐添加剂的过度使用,磷的摄入量急剧增加。慢性肾脏病(CKD)患者过度摄入磷的有害影响已得到公认,并且建议对这些患者进行低磷饮食。然而,限制膳食磷对健康人的影响尚未得到充分研究。

研究者设计了一个很有意思的试验,让健康成年男性(n =12)连续五天食用正常磷饮食(NPD 1500 mg/d)。经过10天的清洗期后,健康成人再服用低磷饮食(LPD,500 mg/d)5天。在每次干预的第5天,分10个时间点采集血液、尿液和唾液样本,并采集粪便标本进行细菌分类鉴定。

通过试验结果看出,与NPD组相比,LPD组24小时平均血清磷酸盐(Pi)、尿Pi、血清甲状旁腺激素和成纤维细胞生长因子23水平降低,而血清钙(Ca)和1,25-二羟基维生素D水平显著升高。日磷摄入量并未改变唾液Pi、尿钙、唾液钙和镁(Mg)代谢。与NPD相比,LPD增加了有益微生物的相对浓度,表明多种细菌代谢途径已发生改变。

A.正常和低磷细菌属浓度比较(将相对浓度大于1%的属分别列示,将相对浓度小于1%的属列示为其他类)。低磷与正常磷微生物群落差异属分析(B)

总体而言这个试验提供了健康成人膳食磷限制对Pi、Ca和Mg代谢的全面数据。更重要的是,本研究首次发现低磷饮食可重塑肠道微生物群,这为健康人低磷饮食的益处提供了信息,并进一步为慢性肾病患者的饮食指导提供了重要的线索。所以,无论什么时候,低磷饮食能让你更加健康!

参考文献:Zhang J Y , Niu C , Zhang Q , et al. Full-Scale Clinical Data and Reshaped Intestinal Microbiome on a Short-Term Low-Phosphorus Diet among Healthy Adults[J]. Journal of Renal Nutrition, 2021.

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    2022-05-08 jml2020
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