同时刺激AGE和LPS通过PLCγ1/JNK/NF-κB通路在MC3T3-E1细胞中诱导炎症介质
Natsuko Tanabe1,2, Keiko Tomita3, Soichiro Manaka2,3
1Department of Biochemistry, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
Cells
|July 6, 2023
概括
先进的糖化最终产品 (AGEs) 与脂多糖化物 (LPS) 结合,增加骨质母细胞中的炎症介质. 这一过程涉及脂酶Cγ1 (PLCγ1) 和c-Jun N-终端激酶 (JNK) 的激活,导致核因子-kappa B (NF-κB) 转位.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 先进的糖化最终产品 (AGEs) 与高血糖和糖尿病有关.
- 已知AGE会恶化炎症性疾病,但它们对骨质母细胞炎症的具体影响尚不清楚.
- 了解AGE诱导的骨质细胞炎症的分子机制对于开发向疗法至关重要.
研究的目的:
- 研究AGE对MC3T3-E1骨质细胞中炎症媒介产生的影响.
- 阐明参与AGE诱导的骨质细胞炎症的潜在分子通路.
- 确定脂酶C (PLC) 信号传导在调解这些效应中的作用.
主要方法:
- MC3T3-E1细胞与AGE和脂聚糖 (LPS) 进行了共同刺激.
- 测量了炎症媒介 (COX2,IL-1α,S100A9,PGE2) 的mRNA和蛋白质水平.
- 评估了核因子-kappa B (NF-κB) 转位和PLCγ1和JNK通路的激活.
- 药物抑制剂 (U73122) 和小干扰RNA (siPLCγ1) 用于探测信号通路.
主要成果:
- 与AGE和LPS的同时刺激显著增加了炎症介质 (COX2,IL-1α,S100A9,PGE2) 与单个刺激或没有刺激相比.
- 脂酶C (PLC) 抑制剂U73122和siPLCγ1减弱了AGE和LPS诱导的炎症.
- 同刺激增强了NF-κB的核转移,该转移被U73122.2.阻断.
- AGEs和LPS的同时刺激增加了酸化PLCγ1 (p-PLCγ1) 和酸化JNK (p-JNK) 水平,这种效应被U73122抑制.
结论:
- 与AGE和LPS共同刺激促进骨质母细胞中炎症媒介的产生.
- 这种炎症反应是由PLCγ1-JNK通路的激活介导的.
- 随后,PLCγ1-JNK通路促进NF-κB核转位,导致骨质细胞炎症.
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