丝虫作为NAD+依赖寿命调节的模型:对BmNmnat1和尼古丁酸的功能性见解

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Updated: Jan 31, 2026

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Qingsong Liu¹, Hongni Li¹, Hao Chen¹

¹Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, Biological Science Research Center, Southwest University, Chongqing, China.

|January 30, 2026

概括

丝虫揭示了由BmNmnat1调节的尼古丁胺氨基二核酸 (NAD+) 代谢对衰老至关重要. 补充尼古丁酸 (NA) 在这种新型无脊椎动物模型中逆转了衰老迹象并延长了寿命.

科学领域:

衰老研究研究衰老研究
代谢生物化学代谢生物化学
无脊椎动物模型

背景情况:

尼古丁胺胺二核酸 (NAD+) 对于细胞功能,如DNA修复和寿命至关重要.
在哺乳动物中,NAD+代谢在衰老中的作用是已知的,但在无脊椎动物中不太了解.
丝虫 (Bombyx mori) 被提出作为研究NAD+依赖衰老的新模型.

研究的目的:

为了研究NAD+代谢在丝虫衰老中的作用.
确定参与Bombyx mori.中的NAD+依赖寿命调节的关键酶和途径.
评估尼古丁酸 (NA) 作为无脊椎动物系统中抗衰老干预的潜力.

主要方法:

跨不同丝虫菌株的比较表型分析.
克里斯普尔/卡斯9基因淘汰和RNAi淘汰的BmNmnat1.1.
涉及尼古丁酸 (NA) 补充的体外和体内实验.
对DNA损伤,细胞循环,氧化还原平衡和氧化应激标志物的评估.

主要成果:

长寿的丝虫菌株显示了较高的NAD+水平和BmNmnat1表达.
BmNmnat1缺乏导致胚胎死亡,DNA损伤,细胞循环中断和表型衰老.
尼古丁酸 (NA) 补充改善了衰老表型,改善了氧化还原平衡,并延长了成人寿命.
这些发现表明BmNmnat1在衰老中具有进化保守的作用.

结论:

丝虫是研究NAD+依赖衰老的一个可行的模型.
BmNmnat1介导的NAD+生物合成对于预防老化表型和确保长寿至关重要.
尼古丁酸 (NA) 作为一种抗衰老干预措施具有前景,需要进一步研究.

关键词:

BmNmnat1 的时间 NAD+代谢 NAD+的代谢老龄化干预的干预措施尼古丁酸是一种尼古丁酸.丝虫是一种丝虫.

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