BRD4通过MDM2-介导的PPARγ降解和热的作用促进了痛风性关节炎
1Key Laboratory of Microecology-Immune Regulatory Network and Related Diseases, School of Basic Medicine, Jiamusi University, Jiamusi, Heilongjiang Province, 154000, People's Republic of China.
Molecular medicine (Cambridge, Mass.)
|May 21, 2024
概括
BRD4通过增加MDM2来驱动痛风性关节炎 (GA) 炎症,这降低了PPARγ. 抑制BRD4或MDM2可降低热,为GA提供潜在的治疗策略.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 痛风性关节炎 (GA) 涉及单酸盐 (MSU) 晶体的积累,触发NLRP3介导的烧灭.
- 需要进一步阐明MSU诱导的GA中热的精确调节机制.
研究的目的:
- 调查MSU诱导的痛风性关节炎中烧伤的调节机制.
- 探索BRD4,MDM2和PPARγ在GA. pyroptotic级联中的作用.
主要方法:
- 在体外 (J774细胞) 和体内 (C57BL/6J小鼠) 建立了GA.模型.
- 通过qPCR,西式涂抹和免疫组织化学评估基因和蛋白质表达.
- 量化炎症标志物,热和分子相互作用 (co-IP,ChIP,露西法酶试验).
主要成果:
- 在GA中PPARγ的下调;其过度表达减少了NLRP3炎症酶激活和热.
- 在GA上调的MDM2通过无处化破坏了PPARγ的稳定;MDM2沉默增加了PPARγ并降低了NLRP3的激活.
- BRD4在GA中升高,转录上调MDM2,促进PPARγ降解,并加剧热.
- 在体内静止BRD4,通过调节MDM2-PPARγ-pyroptosis轴来改善GA.
结论:
- BRD4通过MDM2-介导的PPARγ降解促进GA炎症和热.
- 向BRD4-MDM2-PPARγ通路为治疗痛风性关节炎提供了一个潜在的治疗策略.
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