中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (5): 1147-1155.doi: 10.12307/2026.022

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

自噬影响组蛋白修饰标记H3K4me3调控小鼠早期胚胎发育

胡  静1,朱  伶2,谢  娟2,孔德营1,刘豆豆2   

  1. 1遵义医科大学基础医学院生理学教研室,贵州省遵义市   563099;2重庆医科大学附属妇女儿童医院,重庆市妇幼保健院人类胚胎工程重庆市重点实验室,重庆市   400013


  • 收稿日期:2024-11-02 接受日期:2024-12-28 出版日期:2026-02-18 发布日期:2025-06-24
  • 通讯作者: 刘豆豆,博士,重庆医科大学附属妇女儿童医院,重庆市妇幼保健院人类胚胎工程重庆市重点实验室,重庆市 400013 并列通讯作者:孔德营,博士,副教授,遵义医科大学基础医学院生理学教研室,贵州省遵义市 563099
  • 作者简介:胡静,男,1997年生,汉族,遵义医科大学在读硕士,主要从事早期胚胎自噬方面的研究。
  • 基金资助:
    重庆市科技局项目(CSTB2022NSCQ-MSX0875),项目参与人:谢娟;国家自然科学基金项目(31760339),项目参与人:孔德营;贵州省科技计划项目[黔科合基础-ZK(2022)一般594],项目参与人:孔德营

Autophagy regulates early embryonic development in mice via affecting H3K4me3 modification

Hu Jing1, Zhu Ling2, Xie Juan2, Kong Deying1, Liu Doudou2   

  1. 1Department of Physiology, School of Basic Medical Sciences, Zunyi Medical University, Zunyi 563099, Guizhou Province, China; 2Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Health Center for Women and Children, Chongqing 400013, China 
  • Received:2024-11-02 Accepted:2024-12-28 Online:2026-02-18 Published:2025-06-24
  • Contact: Liu Doudou, PhD, Chongqing Key Laboratory of Human Embryo Engineering, Chongqing Health Center for Women and Children, Chongqing 400013, China Co-corresponding author: Kong Deying, PhD, Associate professor, Department of Physiology, School of Basic Medical Sciences, Zunyi Medical University, Zunyi 563099, Guizhou Province, China
  • About author:Hu Jing, Master candidate, Department of Physiology, School of Basic Medical Sciences, Zunyi Medical University, Zunyi 563099, Guizhou Province, China
  • Supported by:
    a grant from Chongqing Science and Technology Bureau, No. CSTB2022NSCQ-MSX0875 (to XJ [project participant]); National Natural Science Foundation of China, No. 31760339 (to KDY [project participant]); Guizhou Science and Technology Program Project, No. Qiankeheji ZK(2022)General 594 (to KDY [project participant]) 

摘要:




文题释义:
自噬:是在自噬相关基因(Atg)的调控下利用溶酶体降解受损细胞器、错误折叠蛋白质等物质以应对饥饿、内质网应激、缺氧等各种压力的生物学过程。研究表明,自噬在细胞稳态、衰老、凋亡以及神经退行性疾病等多种生理病理过程中发挥重要作用。
H3K4me3:是一种组蛋白修饰标记,具体指组蛋白H3赖氨酸4位点的三甲基化修饰。H3K4me3修饰主要位于基因的启动子区域,与基因的转录激活相关联。
CUT&Tag测序:即靶向剪切及转座酶技术,是一种利用酶锚定技术进行高效、高分辨率的DNA测序文库构建方法,同时是一种新的DNA-蛋白质互作研究方法,可用于检测组蛋白、RNApolymeraseII和转录因子等具有DNA结合功能的蛋白种类,揭示更多染色质在调控基因表达方面的重要作用,有助于分析细胞量少的样本的特定染色质特征,进一步了解基因调控。

背景:自噬作为细胞发育的一个关键调控机制,在胚胎发育的不同阶段发挥着重要作用。目前对于胚胎中自噬如何通过组蛋白修饰来调控胚胎发育的机制尚不明确。
目的:探究胚胎中自噬对H3K4me3修饰的影响以及对胚胎发育的影响。
方法:将小鼠受精卵分为对照组和自噬抑制剂处理组(磷酸氯喹处理组,3-甲基腺嘌呤处理组),分别体外培养至不同时期,分为早期2-细胞胚胎、中期2-细胞胚胎、晚期2-细胞胚胎、4-细胞胚胎、8-细胞胚胎、桑葚期胚胎、囊胚期胚胎。通过免疫荧光检测分析各组晚期2-细胞胚胎的活性氧、自噬标记蛋白LC3B、P62和DNA损失标记物γH2AX以及各阶段胚胎组蛋白H3K4me3的表达;通过染色体靶向切割和标签化(CUT&Tag)检测各组晚期2-细胞胚胎中H3K4me3修饰变化。
结果与结论:①自噬抑制后,小鼠胚胎发育阻滞;②免疫荧光结果显示,自噬抑制后,与对照组相比,自噬抑制剂处理组的活性氧和γH2AX没有显著差异;③自噬抑制剂处理相对于对照组晚期2-细胞胚胎的H3K4me3水平显著升高;④CUT&Tag结果显示,自噬抑制后,H3K4me3在基因近端启动子区域富集显著增加,并且H3K4me3特异性结合基因增多;⑤结果表明,自噬可能通过调控H3K4me3修饰水平从而影响胚胎发育。


关键词: 小鼠, 自噬, H3K4me3, 胚胎发育, 组蛋白修饰, 活性氧, DNA损伤, 小鼠胚胎, 甲基化

Abstract: BACKGROUND: Autophagy, as a key regulatory mechanism of cell development, plays an important role in different stages of embryonic development. The mechanism of how autophagy regulates embryonic development through histone modifications is currently unclear. 
OBJECTIVE: To investigate the effect of autophagy on trimethylation of lysine 4 on histone H3 (H3K4me3) modification in embryos and its effect on embryonic development. 
METHODS: Mouse fertilized eggs were divided into control and autophagy inhibitor-treated groups (chloroquine phosphate-treated group and 3-methyladenine-treated group), and cultured in vitro to different periods of time, and were then classified as early 2-cell embryos, middle 2-cell embryos, late 2-cell embryos, 4-cell embryos, 8-cell embryos, morula stage, and blastocyst stage. Levels of reactive oxygen species, autophagy marker proteins LC3B and P62, DNA loss marker γH2AX, and H3K4me3 were analyzed by immunofluorescence assay in late 2-cell embryos of each group. Changes in H3K4me3 modification in late 2-cell embryos of each group were detected by CUT&Tag. 
RESULTS AND CONCLUSION: (1) Autophagy inhibition caused embryo development arrest. (2) There was no significant difference in reactive oxygen species and γH2AX between the autophagy inhibitor-treated groups and control group. (3) H3K4me3 levels were significantly elevated in the autophagy inhibitor-treated group compared with the control group. (4) CUT&Tag results showed a significantly increased H3K4me3 peaks on the proximal promoter region of the genes after autophagy inhibition and an increase of H3K4me3-specific modification genes. These findings suggest that autophagy may affect embryonic development by regulating the level of H3K4me3 modification. 


Key words: mouse, autophagy, H3K4me3, embryonic development, histone modification, reactive oxygen species, DNA damage, mouse embryo, methylation

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