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Cell Metab:科学家找到高脂饮食、肥胖与心血管疾病之间的直接关联

2017-02-15 生物谷 生物谷

肥胖和高脂饮食会导致免疫系统发生有害激活,增加心脏疾病风险。伦敦玛丽女王大学的研究人员最近将他们的这一发现发表在国际学术期刊Cell Metabolism上。之前研究曾发现肥胖会导致血压和胆固醇水平升高,这两个都是心脏疾病的风险因素。现在研究人员认为肥胖还会触发免疫应答增加心脏病发作风险。这些发现或可帮助开发靶向炎症降低心脏病风险的新疗法。


肥胖和高脂饮食会导致免疫系统发生有害激活,增加心脏疾病风险。伦敦玛丽女王大学的研究人员最近将他们的这一发现发表在国际学术期刊Cell Metabolism上。

之前研究曾发现肥胖会导致血压和胆固醇水平升高,这两个都是心脏疾病的风险因素。现在研究人员认为肥胖还会触发免疫应答增加心脏病发作风险。这些发现或可帮助开发靶向炎症降低心脏病风险的新疗法。

在这项研究中共有1172名正常人、超重和肥胖者的血液样本,研究人员发现肥胖个体血液中T细胞的水平更高。通过对相同人群进行脂肪分布测量他们还发现身体中部脂肪更多的人与大腿和下半身脂肪更多的人相比,身体中部脂肪更多的人体内有更多的T细胞。

T细胞是免疫应答过程中的重要细胞类型能够保护机体对抗感染。但是这些细胞也会引起炎症加重一些心血管疾病的病情。比如,T细胞会促进动脉粥样硬化疾病中脂肪斑块在动脉的聚集,可能导致心脏病发作或中风。

高脂饮食喂养的小鼠体内也存在更多的T细胞,研究人员认为高脂饮食会导致肥胖,也是体内有害炎症的一个诱因。Federica Marelli-Berg教授这样说道:“通过这项研究我们发现了食物、体重与危险性炎症在引起心脏疾病方面的一个直接关联。靶向这种炎症的药物已经在治疗癌症的临床试验中得到检测,因此将这类药物进行重定向用于心脏疾病的治疗也是可能的。”

Dr. Claudio Mauro补充道:“我们下一步计划找出这些有害T细胞在血液中保持高水平的持续时间。我们还不知道调整饮食是否可以使这些T细胞的水平下降并降低心脏疾病风险,也不知道这些T细胞是否一旦多起来就会终生保持高水平。”

这项研究表明我们吃的食物可能通过免疫系统影响我们的心血管健康。通过准确了解这种有害炎症过程如何发挥作用,有助于找出预防方法。未来还需要更多研究对其中的问题进行进一步探索。

原始出处:

Claudio Mauro et al. Obesity-Induced Metabolic Stress Leads to Biased Effector Memory CD4+ T Cell Differentiation via PI3K p110δ-Akt-Mediated Signals. DOI: 10.1016/j.cmet.2017.01.008

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    2017-12-30 维他命
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    2017-08-31 guojianrong
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    2017-11-13 一闲
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    2017-02-17 pcw111

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