“长寿药”、“长生不老药”,甚至“不死药”……这些听起来就很厉害的称号都是网上对膳食补充剂NMN的描述。本以为太上老君的仙丹只是天界的一个传说,但听这架势,仙丹是化为NMN,下凡来咱人间走一遭了? 「极养视界」科普实验室 原创出品 文章|Yu Shen MS 校稿|Xinyin PHD, RD 编审|Haoran PHD 编辑|Jiaqi Xu BS, RD 设计|Fay 阅读信息 📖 难度:★★☆☆☆ 类型:盘点 字数:3598 文章纲要
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如上述所言,NMN的安全性及健康效用在小鼠及线虫体内得到了积极的验证,但要注意这些试验都为动物实验,NMN是否在人体中拥有相同的效用还需要临床试验的证明。 ▲ 表二|市场常见NMN补充剂对比表
▲ 图一|NAD+合成途径 在考虑NAD+的各个前体时我们也不能忘记,NAD+的合成不是有了前体就万事大吉,任何前体转变为NAD+都需要酶的帮助。烟酰胺磷酸核糖转移酶(NAMPT)是NAD+合成的关键限速酶,许多研究都证明了锻炼以及热量限制可提升这种酶的表达,从而增加NAD+的生物合成以及SIRT1的活性[19]。而肥胖以及高热量饮食会限制NAMPT酶活,减少NAD+在体内的水平[4]。 ■■ 参考文献 [1] Mills, K. F., Yoshida, S., Stein, L. R., Grozio, A., Kubota, S., Sasaki, Y., Redpath, P., Migaud, M. E., Apte, R. S., Uchida, K., Yoshino, J., & Imai, S. I. (2016). Long-Term Administration of Nicotinamide Mononucleotide Mitigates Age-Associated Physiological Decline in Mice. Cell metabolism, 24(6), 795–806. https:///10.1016/j.cmet.2016.09.013 [2] 'What is NMN?'. Retrieved 2020, from https://www./precursors/what-is-nmn [3] Zhu, X. H., Lu, M., Lee, B. Y., Ugurbil, K., & Chen, W. (2015). In vivo NAD assay reveals the intracellular NAD contents and redox state in healthy human brain and their age dependences. Proceedings of the National Academy of Sciences of the United States of America, 112(9), 2876–2881. https:///10.1073/pnas.1417921112 [4] Rajman, L., Chwalek, K., & Sinclair, D. 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