收稿日期: 2025-04-19
网络出版日期: 2025-08-28
基金资助
中国医药卫生事业发展基金项目(BJ2023YCPYJH003);广东省自然科学基金项目(2024A1515013145);粤港澳联合创新领域专项资金项目(2024A0505090001)
Androgen‑mediated DGAT2 upregulation promotes ferroptosis in granulosa cells in polycystic ovary syndrome
Received date: 2025-04-19
Online published: 2025-08-28
目的 探讨高雄激素通过DGAT2诱导铁死亡在多囊卵巢综合征(PCOS)颗粒细胞功能损伤中的作用机制。 方法 体外培养人卵巢颗粒细胞系KGN,分别给予不同浓度睾酮(1、10、100 μmol/L)处理,检测DGAT2及铁死亡标志物(GPX4、ROS、MDA)、脂质代谢指标(TG、PUFAs)、脂滴积聚及细胞存活率的变化。此外,通过siRNA敲低DGAT2并联合Erastin处理,进一步验证DGAT2对铁死亡的影响。 结果 睾酮处理上调DGAT2表达(P < 0.01),增加了细胞内TG和PUFAs含量(P < 0.001),促进了脂滴积聚,伴随ROS和MDA水平升高(P < 0.05,P < 0.001)及GPX4表达下降(P < 0.001),明显降低细胞活力(P < 0.001)。DGAT2敲低可逆转上述变化,缓解铁死亡并显著改善细胞存活率(P < 0.001)。 结论 DGAT2可能参与了PCOS患者高雄激素介导的颗粒细胞铁死亡过程。
关键词: 多囊卵巢综合征; 二酰基甘油酰基转移酶2; 铁死亡; 颗粒细胞; 高雄激素
李远成 , 李荔 . 多囊卵巢综合征高雄激素介导二酰基甘油酰基转移酶2基因促进颗粒细胞铁死亡[J]. 实用医学杂志, 2025 , 41(16) : 2498 -2506 . DOI: 10.3969/j.issn.1006-5725.2025.16.009
Objective To investigate the role of androgen-induced DGAT2-mediated ferroptosis in granulosa cell dysfunction in patients with polycystic ovary syndrome (PCOS). Methods The human granulosa cell line KGN was exposed to various concentrations of testosterone (1, 10, and 100 μmol/L). The effects on DGAT2 expression, markers of ferroptosis (GPX4, ROS, MDA), indicators of lipid metabolism (TG, PUFAs), lipid droplet accumulation, and cell viability were evaluated. Additionally, DGAT2 knockdown using siRNA in combination with Erastin treatment was performed to further elucidate the role of DGAT2 in ferroptosis regulation. Results Testosterone significantly upregulated DGAT2 expression (P < 0.01), increased intracellular TG and PUFA levels (P < 0.001), promoted lipid droplet accumulation, elevated ROS and MDA levels (P < 0.05, P < 0.001), suppressed GPX4 expression (P < 0.001), and reduced cell viability (P < 0.001). DGAT2 knockdown reversed these effects, thereby alleviating ferroptosis and markedly enhancing cell viability (P < 0.001). Conclusions DGAT2 may be involved in the process of androgen-mediated granulosa cell ferroptosis in patients with PCOS.
Key words: polycystic ovary syndrome; DGAT2; ferroptosis; granulosa cells; androgen
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