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南京医科大学学报(自然科学版) 第41卷第10期
·1440 · Journal of Nanjing Medical University(Natural Sciences) 2021年10月
·基础医学·
银杏叶提取物对瓣膜间质细胞钙化的保护作用
刘 静,孔祥清 *
南京医科大学第一附属医院心血管内科,江苏 南京 210029
[摘 要] 目的:研究银杏叶提取物(ginkgo biloba extract,EGB761)对华法林诱导的主动脉瓣膜间质细胞(aortic valve intersti⁃
tial cells,AVIC)钙化及成骨分化的保护作用。方法:分离猪AVIC,将不同浓度的EGB761作用于AVIC,通过茜素红染色、细胞
内钙含量以及碱性磷酸酶(alkaline phosphatase,ALP)活性检测观察EGB761对猪AVIC钙化的作用。Real⁃time PCR和Western
blot检测成骨分化相关基因Runt相关转录因子2(runt⁃related transcription factor 2,Runx2)、Msx2(msh homeobox 2)、骨形态发生
蛋白2(bone morphogenetic protein⁃2,BMP2)和磷酸化Smad1/5的表达。结果:EGB761显著抑制华法林诱导的AVIC钙化,成骨
分化相关基因Runx2、Msx2、BMP2的mRNA表达减低,Smad1/5磷酸化及Runx2蛋白表达被抑制。结论:EGB761可能是通过下
调Smad1/5磷酸化水平,抑制BMP2/Smad1/5/Runx2信号通路,从而缓解了AVIC钙化和成骨分化。
[关键词] 银杏叶提取物;主动脉瓣钙化;华法林;BMP2/Smad1/5/Runx2信号通路
[中图分类号] R542.5 [文献标志码] A [文章编号] 1007⁃4368(2021)10⁃1440⁃07
doi:10.7655/NYDXBNS20211003
Ginkgo biloba extract EGB761 alleviates aortic valve interstitial cells calcification
LIU Jing,KONG Xiangqing *
Department of Cardiology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China
[Abstract] Objective: To investigate the protective effects of ginkgo biloba extract(EGB761)on warfarin⁃induced calcification and
osteogenic differentiation of aortic valve interstitial cell(AVIC). Methods:Porcine AVICs were extracted,and alizarin red staining,
intracellular calcium content and alkaline phosphatase activity were detected to analyze the effects of different concentrations of
EGB761 on the calcification. The expressions of Runt ⁃ related transcription factor 2(Runx2),msh homeobox 2(Msx2),bone
morphogenetic protein ⁃ 2(BMP2)and phosphorylated Smad1/5 were detected by RT ⁃ PCR and Western blot. Results:Our results
indicated that pAVICs from stimulation with warfarin increased calcium deposition and expression of osteogenic markers(Runx2,
Msx2,and BMP2)and promoted phosphorylated⁃Smad1/5 from the cytoplasm to the nucleus. The addition of EGB761 significantly
inhibited phosphorylated ⁃ Smad1/5 from the cytoplasm to the nucleus,thus,suppression calcification. Conclusion:EGB761 may
reduce the phosphorylation level of Smad1/5 and inhibit the BMP2/Smad1/5/Runx2 signaling pathway,thereby alleviating the
calcification and osteogenic differentiation of AVIC.
[Key words] ginkgo biloba extract;aortic valve calcification;warfarin;BMP2/Smad1/5/Runx2 signaling
[J Nanjing Med Univ,2021,41(10):1440⁃1446]
钙化性主动脉瓣膜疾病(calcific aortic valve dis⁃ 了40%~50% [1-2] 。该疾病的发展被认为是由内皮损
ease,CAVD)是一种常见的心脏疾病。在65岁以上 伤、脂质沉积、炎性细胞浸润、细胞外基质(extracel⁃
的成年人中,CAVD 导致心血管疾病的死亡率增加 lular matrix,ECM)沉积和瓣膜新血管形成引起的,
了大约 30%;在 75 岁以上的成年人中,死亡率增加 从而促进成骨和钙化 。迄今为止,尚无有效的药
[3]
物可以治疗或者延缓CAVD的进展。华法林是维生
[4]
[基金项目] 国家自然科学基金(81900349) 素 K 的拮抗剂,一直是抗凝治疗的主要药物 。华
∗ 法林一方面通过抑制肝脏中的维生素K环氧还原酶
通信作者(Corresponding author),E⁃mail: kongxq@njmu.edu.cn