相关实验视频
Updated: Jun 11, 2025

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Kupffer Cell Isolation for Nanoparticle Toxicity Testing
Published on: August 18, 2015
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5mC的DNA和m6的RNAA合作,为Kupffer细胞激活Upregulate Phosphoenolpyruvate Carboxykinase 2进行制
Yulan Zhao1,2, Wenbo Yuan1,2, Yue Feng1,2
1MOE Joint International Research Laboratory of Animal Health & Food Safety, Nanjing Agricultural University, Nanjing 210095, China.
International journal of molecular sciences
|September 28, 2024
概括
DNA 5-甲基细胞因子 (5mC) 和RNA N6-甲基氨酸 (m6A) 的表观遗传修饰协作,在炎症库弗弗细胞 (KC) 中增加酸酸碳素激酶2 (PCK2) 表达. 这种双重表观遗传调节驱动细胞应激反应.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 基因5-甲基细胞氨酸 (5mC) 和RNAN6-甲基氨酸 (m6A) 是关键的表观遗传修饰涉及到细胞应激和炎症.
- 库弗弗细胞 (KCs) 在炎症过程中对基酸碳酸酶2 (PCK2) 进行上调,但5mC和m6A在这一过程中的作用尚不清楚.
研究的目的:
- 调查DNA 5mC和RNA m6A修饰在LPS刺激的KC中PCK2上调中的作用.
- 阐明5mC和m6A在KC激活期间调节PCK2表达中的相互作用.
主要方法:
- 在LPS激活的KC中分析5mC和m6A水平.
- 基因沉默实验,以评估脱甲基化和高甲基化对PCK2表达的影响.
- 相互测试以确定5mC和m6A之间的上游/下游关系.
- 目标基因和调控蛋白的鉴定 (例如,METTL3,METTL14,IGF2BP1).
主要成果:
- KCs的LPS刺激导致全球5mC脱甲基化和m6A高甲基化,与增加的PCK2水平相关.
- 抑制5mC脱甲基化或m6A高甲基化显著降低PCK2和促炎性细胞因子上调.
- 5mC去甲基化在m6A高甲基化之前起作用.
- PCK2和甲基转移酶基因促进体 (CpG岛屿) 脱甲基化,而PCK2 mRNA 3'UTR显示m6A高甲基化.
- 涉及IGF2BP1的m6A介导机制有助于PCK2mRNA的稳定性和蛋白质的产生.
结论:
- DNA 5mC和RNA m6A协同在转录和转录后的水平上升调节PCK2表达.
- 这种表观遗传交叉对PCK2驱动的KC炎症反应至关重要.
- 针对这些表观遗传修饰可能为炎症性疾病提供治疗策略.
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