J RENAL NUTR:高磷酸盐饮食一定对慢性肾病患者有害?

2022-01-08 MedSci原创 MedSci原创

相对于动物性磷酸盐摄入量而言,较高的 PWV 水平与较高的植物性磷酸盐摄入量相关,仍需要大量数据进一步研究其相关联系。

高血磷水平与心血管疾病的不良结局增加有关,而慢性肾病(CKD)的骨和矿物质代谢异常,包括较高的血清磷酸盐,是增加心血管疾病的重要危险因素。然而,在非透析CKD患者中,饮食中磷酸盐摄入量与心血管参数之间的关系尚未得到充分的研究。本研究旨在探讨3-4期CKD成人中磷酸盐摄入量与骨和矿物质代谢生物标志物和心血管标志物之间的关系。

有132 名参加了磷酸盐减少对慢性肾病血管终点影响试验的参与者被邀请参加这项研究。通过7天自我管理的饮食记录来确定膳食磷酸盐摄入量及其来源(动物、植物或动植物混合物),并测量血清和尿磷酸盐、血清钙甲状旁腺激素、成纤维细胞生长因子-23 和中间心血管标志物脉搏波速度(PWV) 。采用Pearson相关性和线性回归研究了膳食磷酸盐摄入量与骨代谢和心血管标志物之间的关系。采用成分数据分析方法,分析了不同磷源摄食的影响。

一共有90名参与者(年龄64±12岁,68%为男性,估计肾小球滤过率26.6±7.6 mL/min/1.73 m2,每日磷酸盐摄入量1544±347 mg)完成了研究膳食磷摄入量与生化指标、PWV和腹主动脉钙化之间的相关性在r=−0.13到r= +0.13之间。线性回归显示,饮食中磷酸盐含量与生化或心血管参数之间没有关联。磷酸盐摄入来源与PWV相关,但与骨和矿物质代谢的其他生物标志物无关。较高的PWV值与植物性磷酸盐摄入高于动物性磷酸盐摄入相关。

单变量线性回归结果

以动物磷酸盐摄入量作为参考来源,使用单变量分析磷酸盐摄入量的来源以及骨和矿物质疾病临床生物标志物与心血管标志物之间的关联

总而言之,通过膳食记录测量的膳食磷酸盐总摄入量水平与骨和矿物质代谢的生化标志物或中间心血管标志物没有统计学上的显著关系。相对于动物性磷酸盐摄入量而言,较高的 PWV 水平与较高的植物性磷酸盐摄入量相关,仍需要大量数据进一步研究其相关联系。

参考文献:Marguerite Conley, Katrina L. Campbell, Carmel M. Hawley, et al, Relationship Between Dietary Phosphate Intake and Biomarkers of Bone and Mineral Metabolism in Australian Adults With Chronic Kidney Disease, Journal of Renal Nutrition, Volume 32, Issue 1, 2022, Pages 58-67, ISSN 1051-2276, https://doi.org/10.1053/j.jrn.2021.07.004.

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