Li Weike, Gao Rufei, Ding Yubin, Chen Xuemei, Liu Xueqing, He Junlin, Li Fangfang, Long Jing, Lu Siyu, Yang Chengshun, Wang Yingxiong
Laboratory of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China.
Joint International Research Laboratory of Reproduction and Development, Chongqing Medical University, Chongqing, China.
Front Physiol. 2022 Nov 11;13:1042449. doi: 10.3389/fphys.2022.1042449. eCollection 2022.
Numerous studies have suggested the possibility of explaining the etiology of metabolic syndrome through DNA methylation. DNA methyltransferase 3B (DNMT3B) plays an important role in DNA methylation. There was an alteration in maternal (F0) endometrial function, which might lead to growth and developmental disorder in offspring (F1). In this study, we investigated the effect of maternal endometrial deficiency on the metabolism in offspring. We constructed endometrial conditional knockout female mice (cKO) which were mated with normal C57BL/6 male mice to obtain the F1 generation. Further, to study the development of these offspring, we observed them at three different life stages which included the 6-week-old juvenile, 9-week-old sub-adult and 12-week-old adult. Follow the detection of a range of metabolism-related indicators, we found that in the cKO F1 generation, liver triglyceride level was significantly elevated in 9-week-old female mice, lipid droplet deposition was significantly increased in 9-week-old and 12-week-old mice, and the expression of lipid metabolism key factors in the liver was markedly decreased except of 6-week-old male mice. These results indicate that maternal endometrial conditional knockout leads to imbalance in hepatic metabolism in F1 generation, the mechanism of which requires further discussion.
许多研究表明,通过DNA甲基化来解释代谢综合征的病因是有可能的。DNA甲基转移酶3B(DNMT3B)在DNA甲基化过程中起着重要作用。母本(F0)子宫内膜功能存在改变,这可能导致子代(F1)生长发育障碍。在本研究中,我们调查了母本子宫内膜缺陷对子代代谢的影响。我们构建了子宫内膜条件性敲除雌性小鼠(cKO),将其与正常的C57BL/6雄性小鼠交配以获得F1代。此外,为了研究这些子代的发育情况,我们在三个不同的生命阶段对它们进行了观察,包括6周龄的幼年、9周龄的亚成年和12周龄的成年阶段。在检测了一系列与代谢相关的指标后,我们发现,在cKO F1代中,9周龄雌性小鼠的肝脏甘油三酯水平显著升高,9周龄和12周龄小鼠的脂滴沉积显著增加,并且除了6周龄雄性小鼠外,肝脏中脂质代谢关键因子的表达明显降低。这些结果表明,母本子宫内膜条件性敲除导致F1代肝脏代谢失衡,其机制有待进一步探讨。