Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang 330006, China.
Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang 330006, China.
Int J Mol Sci. 2022 Jan 27;23(3):1479. doi: 10.3390/ijms23031479.
Lysophosphatidylcholine (LPC), also known as lysolecithin, is one of the major components of oxidized low-density lipoproteins (ox-LDL). In the pathogenetic process of diverse diseases, LPC acts as a significant lipid mediator. However, no evidence shows that LPC can affect the female reproductive system. In our study, we found that LPC inhibited the cell viability of primary mouse ovarian granulosa cells. Meanwhile, LPC was shown to induce apoptosis, which is accompanied by an increase in apoptosis-related protein levels, such as cleaved caspase-3, cleaved caspase-8 and Bax, as well as a decrease in Bcl-2. The total numbers of early and late apoptotic cells also increased in the LPC-treated cells. These results indicated that LPC could induce apoptosis of mouse ovarian granulosa cells. Furthermore, the increase in autophagy-related protein levels and the number of autophagic vesicles suggested that LPC could induce autophagy. The inhibition of oxidative stress by N-acetyl-L-cysteine (NAC) could rescue the induction of apoptosis and autophagy by LPC, which indicated that oxidative stress was involved in LPC-induced apoptosis and autophagy. Interestingly, the inhibition of autophagy by 3-MA could reserve the inhibition of cell viability and the induction of apoptosis by LPC. In conclusion, oxidative stress was involved in LPC-induced apoptosis, whileautophagy of mouse ovarian granulosa cells and the inhibition of autophagy could alleviate LPC-induced apoptosis.
溶血磷脂酰胆碱(LPC),又称溶血卵磷脂,是氧化型低密度脂蛋白(ox-LDL)的主要成分之一。在多种疾病的发病过程中,LPC 作为一种重要的脂质介质发挥作用。然而,没有证据表明 LPC 可以影响女性生殖系统。在我们的研究中,我们发现 LPC 抑制了原代小鼠卵巢颗粒细胞的细胞活力。同时,LPC 诱导细胞凋亡,伴随着凋亡相关蛋白水平的升高,如 cleaved caspase-3、cleaved caspase-8 和 Bax,以及 Bcl-2 的降低。LPC 处理的细胞中早期和晚期凋亡细胞的总数也增加了。这些结果表明 LPC 可以诱导小鼠卵巢颗粒细胞凋亡。此外,自噬相关蛋白水平的增加和自噬小体的数量表明 LPC 可以诱导自噬。N-乙酰-L-半胱氨酸(NAC)抑制氧化应激可以挽救 LPC 诱导的凋亡和自噬,这表明氧化应激参与了 LPC 诱导的凋亡和自噬。有趣的是,3-MA 抑制自噬可以保留 LPC 对细胞活力的抑制作用和诱导的细胞凋亡。总之,氧化应激参与了 LPC 诱导的细胞凋亡,而自噬可以减轻 LPC 诱导的细胞凋亡。