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麦角硫因:一种有前途的生物标志物,将健康意识饮食模式与降低心血管代谢疾病风险和死亡率联系起来

本文讨论了一项基于人群的前瞻性研究,该研究旨在通过长期随访确定与健康饮食模式 ( HCFP ) 相关的血浆代谢物,以及降低心脏代谢发病率和死亡率。研究发现,氨基酸麦角硫因水平的升高与HCFP以及未来冠状动脉疾病( CAD )、心血管和全因死亡风险的降低密切相关。这些发现表明了将饮食与心脏代谢健康联系起来的新途径。

 

一些与HCFP相关的代谢物此前已与自我报告的特定食物组或项目的摄入量相关。 麦角硫因存在于许多饮食来源中,蘑菇、豆豉和大蒜中的含量特别高。此前人们认为它与蔬菜、海鲜的摄入量较高、固体脂肪和添加糖的摄入量较低以及健康的饮食模式有关。这与关于麦角硫因、蔬菜、海鲜摄入量和HCFP之间关系的研究结果一致。

 

脯氨酸甜菜碱(又名水苏碱)和甲基脯氨酸都是柑橘类水果摄入量的已知生物标记物,这可以解释本研究中它们与水果摄入量之间的关联。乙酰鸟氨酸与较高的蔬菜摄入量有关,本研究也证实了这一点。泛酸(又名维生素 B5)广泛分布于所有食物组中。相反,尿胆素在本研究中与HCFP显示出负相关性,而之前并未发现其与任何饮食摄入量存在关联。代谢物水平与食物组之间的相关性不大,但麦角硫因与食物组之间的相关系数与之前报告的值相似。尽管马尔默饮食与癌症 (MDC) 研究采用了广泛的饮食抽样方法,但测量不准确性可能会削弱观察到的相关性。

 

麦角硫因HCFP具有最强关联,并且与心脏代谢发病率和死亡率具有最明显的保护性关联,独立于传统的风险因素。结果表明,麦角硫因是健康饮食摄入和未来心脏代谢疾病低风险的生物标志物。 麦角硫因已被证明可以保护啮齿动物免受缺血再灌注损伤,并且还被认为是一种对人体具有潜在有益作用的抗氧化剂。 麦角硫因 与其他建议的抗氧化剂不同,它具有一种被认为在炎症区域上调的特定转运蛋白,提供麦角硫因,具有更受控制的抗氧化功能的潜力。 拥有较高水平的麦角硫因 可以以反应的方式防止氧化应激,这被认为是心血管疾病(CVD)发病机制的一个重要因素强>)并可以解释研究结果。

 

最近在健康人体中进行的一项研究表明,口服麦角硫因可以增加循环麦角硫因的水平,并降低一些氧化损伤生物标志物的水平。需要采用随机治疗方案设计的干预试验来研究这种潜在的抗氧化作用是否可以降低心脏代谢疾病的风险。

麦角硫因酒精摄入量之间的正相关性先前已被证明,这种关联可以通过酒精饮料中存在的麦角硫因或酒精改变麦角硫因的吸收效率来解释存在于其他饮食来源中。

 

总之,这项研究发现,较高水平的麦角硫因与较低的心脏代谢疾病和死亡风险相关,这表明特定的健康饮食可能通过影响特定的代谢途径和机制来影响这些结果。 麦角硫因与HCFP以及未来CAD 、心血管和全因死亡风险较低之间存在强烈而独立的关联,这凸显了了解饮食摄入导致的分子事件及其与疾病和健康结果的关系的重要性。这些知识将通过确定可通过饮食改变的代谢途径和疾病机制来促进未来的干预研究,从而设计出更有效的饮食干预措施来改善心脏代谢健康。

 

 

参考:

 

1. Smith E、Ottosson F、Hellstrand S 等人麦角硫因与降低死亡率和心血管疾病风险相关Heart 2020;106:691-697。

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