山东大学学报 (医学版) ›› 2022, Vol. 60 ›› Issue (10): 1-8.doi: 10.6040/j.issn.1671-7554.0.2022.0439
• 基础医学 • 下一篇
张薇薇1,2,华芳3,梁超帅2,褚苗苗2,孙嘉忆4,Frank Zaucke5,辛玮2,4
ZHANG Weiwei1,2, HUA Fang3, LIANG Chaoshuai2, CHU Miaomiao2, SUN Jiayi4, FRANK Zaucke5, XIN Wei2,4
摘要: 目的 探讨促甲状腺激素(TSH)对软骨细胞(PMCs)分化的作用及相关机制。 方法 利用qRT-PCR、Western blotting、免疫荧光检测PMCs细胞外基质Ⅱ型胶原(Col Ⅱ)、Ⅹ型胶原(Col Ⅹ)以及基质金属蛋白酶3和13(MMP3,MMP13)的表达变化。采用qRT-PCR、ELISA检测TSH刺激PMCs后炎症因子白介素-1β(IL-1β)、白介素-6(IL-6)、肿瘤坏死因子-α(TNFα)的表达水平。应用高通量RNA-seq技术筛选TSH调控PMCs分化的差异表达基因,通过在原代PMCs中过表达CTRP3,探索TSH调控PMCs分化的机制。 结果 qRT-PCR、Western blotting结果显示,TSH刺激下PMCs中MMP3(P=0.016,P<0.001)和MMP13(P均<0.001)的表达显著增加。qRT-PCR、ELISA结果显示,IL-1β(P=0.007,P=0.002)、IL-6(P均<0.001)、TNFα(P=0.006,P<0.001)的表达上调。通过RNA-seq筛选出差异表达基因CTRP3。CTRP3过表达后PMCs中Col Ⅱ表达增高(F=76.062,F=77.085,F=190.115)、Col Ⅹ表达降低(F=33.494,F=38.424,F=43.351);同时与单纯TSH刺激相比,MMP3(F=88.607,F=214.145,F=135.60)、MMP13(F=116.561,F=138.674,F=86.865)表达均显著降低(P均<0.001),IL-1β、IL-6、TNFα的表达则均降低(P均<0.001)。 结论 CTRP3对TSH诱导的PMCs分化具有保护作用,有望成为亚临床甲状腺功能减退症(SCH)患者关节损伤的潜在治疗靶点。
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