脂质过氧化产品诱导碳酸应激,线粒体功能障碍,以及人类和小鼠细胞的细胞衰老
T Blake Monroe1, Ann V Hertzel1, Deborah M Dickey1
1Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota-Twin Cities, Minneapolis, Minnesota, USA.
Aging cell
|October 12, 2024
概括
生物性脂质酶,如4-HNE,通过破坏DNA和蛋白质,触发细胞衰老. 这个被称为生物性脂质诱导衰老 (BLIS) 的过程,将氧化应激与与年龄相关的疾病联系起来.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 老年学是一门学科.
背景情况:
- 脂质过氧化产生电友性脂质酶.
- 这些分子导致DNA和蛋白质损伤,诱导基因毒性和蛋白质毒性压力.
- 在肥胖和衰老期间,脂质积在内脏脂肪中.
研究的目的:
- 为了研究生物性脂质是否作为细胞衰老的内源性诱导剂.
- 为了探索脂质内诱导衰老的分子机制.
- 评估与年龄相关的病理中的向脂质酶的治疗潜力.
主要方法:
- 用脂质酶 (4-HNE,4-HHE,4-ONE) 治疗IMR90纤维细胞和小鼠脂肪干细胞.
- 对衰老标志物 (γH2AX,p53,p21Cip1),细胞因子概况,线粒体功能和亡抵抗性的分析.
- 在体内研究中,使用L-卡诺辛作为肥胖小鼠中的4-HNE清除剂.
主要成果:
- 脂质酶启动细胞衰老,其特征是DNA损伤,p53/p21Cip1激活和改变细胞因子分泌.
- 衰老细胞表现出线粒体功能障碍,改变了核酸池,以及对亡的抵抗力.
- 在体外,L-carnosine改善了脂质酶醇诱导的衰老,并在体内减少了衰老生物标志物.
结论:
- 生物的脂质酶是细胞衰老的内源调节剂.
- 生物性脂质诱导衰老 (BLIS) 提供了氧化应激和年龄相关疾病之间的机械联系.
- 向脂质酶可以为与年龄相关的疾病提供治疗策略.
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