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β-尼古丁胺胺单核酸通过恢复SIRT1功能来防止肝脏恒星细胞的衰老和脂质积累

Tomofumi Saka¹, Riri Hayashi², Yuta Yoshino¹

¹Laboratory of Biochemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Gifu, Japan.

Chemico-biological interactions

|March 9, 2026

概括

尼古丁胺胺 mononucleotide (NMN) 防止与衰老相关的肝细胞衰老,这是由脂质过氧化衍生的化物 (LPDAs) 引起的. NMN恢复线粒体功能和Sirtuin 1 (SIRT1) 活性,为肝脏疾病提供潜在的抗衰老益处.

科学领域:

细胞生物学细胞生物学
衰老研究研究衰老研究
肝病学肝病学是一种肝病学.

背景情况:

肝星细胞 (HSC) 的激活对于肝脏的修复至关重要,但当细胞衰老时,可以导致纤维化和癌症.
脂质过氧化衍生的化物 (LPDA),如HNE和ONE,随着年龄的增长而积累,并诱导HSC衰老.
尼古丁胺胺单核酸 (NMN) 是NAD+前体和SIRT1辅因子,具有潜在的抗衰老特性.

研究的目的:

为了研究LPDAs (HNE,ONE) 对HSC衰老的影响.
评估NMN对LPDA诱导的HSC衰老的抑制作用.
阐明NMN保护作用的潜在机制.

主要方法:

用HNE和ONE对LX-2细胞进行治疗以诱导衰老.
评估衰老标志物 (SA-βGal活性,分泌表型因子).
评估NMN对线粒体功能 (Bax/Bcl2比率,膜潜力),SIRT1活性和脂质代谢的影响.

主要成果:

在LX-2细胞中,HNE和ONE显著增加了衰老标志物.
NMN预处理抑制了HNE诱导的衰老,降低了Bax/Bcl2比率,并恢复了线粒体膜潜力.
NMN恢复了SIRT1的活性和表达,逆转了LPDA诱导的脂质代谢酶的减少,并增加了细胞内脂质含量.

结论:

NMN有效地抑制LPDA诱导的HSC衰老.NMN有效地抑制LPDA诱导的HSC衰老.
NMN的保护机制包括改善线粒体功能障碍,恢复NAD+水平和SIRT1活性,改善脂质积累.
作为一种治疗策略,NMN显示出与HSC相关的衰老病理的前景.

关键词:

4 - 基 - 2 - 非纳醇肝脏的恒星细胞.衰老是一种老化.在Sirtuin 11中使用.这是一种β-尼古丁胺胺基 mononucleotide.

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