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JCEM:甜菜碱的代谢效应!

2018-06-06 xing.T MedSci原创

由此可见,糖尿病前期患者导致二甲基甘氨酸累积的二甲基甘氨酸脱氢酶是甜菜碱代谢的限速酶。甜菜碱的代谢效应较小,进一步的研究可以阐明临床前和人类对甜菜碱的反应差异的机制,以及明确补充代谢物下游的二甲基甘氨酸是否可改善新陈代谢。

血浆甜菜碱与人类胰岛素敏感性相关。在高脂喂养的小鼠中补充甜菜碱可改善葡萄糖稳态、肝脏脂肪、胰岛素敏感性,并增加腹股沟白色脂肪组织的能量消耗和氧化能力。近日,内分泌和代谢性疾病领域权威杂志Journal of Clinical Endocrinology & Metabolism上发表了一篇研究文章。该研究旨在评估口服甜菜碱对糖尿病前期肥胖患者代谢的影响。

在这项12周平行组、随机双盲、安慰剂对照试验中。以大学附属医院为基础,研究人员将27例肥胖和糖尿病前期患者随机接受甜菜碱3300mg,每日2次,每次10天,然后4950mg,每日2次,连续12周或安慰剂治疗。主要观察指标为胰岛素敏感性、血糖、肝脏脂肪和内皮功能的变化。

服用甜菜碱与安慰剂组相比,代谢组学分析显示血浆二甲基甘氨酸(DMG)增加16.5倍(P<0.0001),其下游丝氨酸和蛋氨酸分别增加了1.3和1.5倍。甜菜碱倾向于降低空腹血糖(P=0.08 vs. 安慰剂),但对血糖没有其他影响。与安慰剂相比,甜菜碱降低口服葡萄糖后胰岛素曲线下面积降低(P=0.038)。由金标准血糖正常高胰岛素钳夹评估的胰岛素敏感性没有得到改善。与安慰剂相比,服用甜菜碱后血清总胆固醇升高(P=0.032)。各组肝内甘油三酯或内皮功能变化无显著性差异。

由此可见,糖尿病前期患者导致二甲基甘氨酸累积的二甲基甘氨酸脱氢酶是甜菜碱代谢的限速酶。甜菜碱的代谢效应较小,进一步的研究可以阐明临床前和人类对甜菜碱的反应差异的机制,以及明确补充代谢物下游的二甲基甘氨酸是否可改善新陈代谢。

原始出处:

Ana Maria Grizales,et al. Metabolic Effects of Betaine: A Randomized Clinical Trial of Betaine Supplementation in Prediabetes.J Clin Endocrinol Metab. 2018. https://doi.org/10.1210/jc.2018-00507

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    2018-07-16 achengzhao
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    2019-03-23 smallant2015
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    2018-06-28 jyzxjiangqin

    甜菜碱的代谢效应.

    0

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    2018-06-07 润泽River

    谢谢分享

    0

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    2018-06-06 清风拂面

    谢谢分享学习

    0

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