摘要
背景:前期研究表明葛根素干预后破骨细胞的分化被抑制,Notch1、HES1、Jagged1等Notch信号通路相关蛋白表达量下降,但Notch1信号通路对于葛根素抑制破骨细胞分化的作用机制尚不明确。目的:探究Notch信号通路对葛根素抑制小鼠巨噬细胞Raw264.7分化为破骨细胞的影响。方法:将Raw264.7细胞分为7组干预培养,空白对照组采用DMEM高糖完全培养基培养,破骨细胞诱导组采用破骨诱导培养基培养,葛根素干预组在破骨诱导的同时加入50μmol/L葛根素培养,葛根素+Notch1 si RNA对照组、葛根素+Notch1 si RNA组、葛根素+Notch1过表达对照组、葛根素+Notch1过表达组分别采用Notch1 si RNA对照序列、Notch1 si RNA序列、Notch1过表达对照质粒、Notch1过表达质粒转染Raw264.7细胞后,加入破骨诱导培养基和葛根素进行培养。培养7 d后,采用抗酒石酸酸性磷酸酶染色观察破骨细胞的数量和大小,F-actin染色观察破骨细胞骨架形成情况,RT-PCR检测破骨细胞形成标志物的基因表达水平。结果与结论:(1)抗酒石酸酸性磷酸酶染色显示:葛根素干预可以抑制破骨细胞的生成,Notch1沉默会进一步减少破骨细胞的生成数量,Notch1过表达后破骨细胞生成数量明显增加;(2)F-actin染色显示:Raw264.7细胞经破骨诱导可以形成边界清晰的F-actin环,葛根素干预会抑制细胞骨架的形成,Notch1沉默会增强葛根素的抑制作用,而Notch1过表达则能减弱葛根素的抑制作用;(3)RT-PCR检测显示,葛根素可以抑制抗酒石酸酸性磷酸酶、组织蛋白酶K和c-Fos的m RNA表达,Notch1沉默后上述3个因子的m RNA表达进一步降低,Notch1过表达后上述3个因子的m RNA表达增加。结果表明:Notch信号通路在Raw264.7细胞分化为破骨细胞的过程中发挥作用,葛根素通过抑制Notch信号通路抑制Raw264.7细胞分化为破骨细胞。
BACKGROUND:Previous studies have shown that puerarin can inhibit the differentiation of osteoclasts,and the expression of Notch signaling pathway-related proteins such as Notch1,HES1,and Jagged1 is decreased.However,the specific mechanism of the Notch1 signaling pathway for the inhibition of osteoclast differentiation by puerarin is not clear.OBJECTIVE:To explore the effect of Notch signaling pathway on puerarin inhibiting the differentiation of mouse macrophage Raw264.7 into osteoclasts.METHODS:Raw264.7 cells were divided into seven groups for intervention culture.Blank control group was cultured in high-sugar DMEM medium;the osteoclast induction group was cultured in osteoclast induction medium;the puerarin intervention group was cultured with 50μmol/L puerarin at the same time of osteoclast induction;Notch1 siRNA control group,Notch1 siRNA group,Notch1 overexpression control group and Notch1 overexpression group were transfected with Notch1 siRNA control sequence,Notch1 siRNA,Notch1 overexpression control plasmid and Notch1 overexpression plasmid,respectively,and then cultured with osteoclast induction medium and puerarin.The number and size of osteoclasts were observed by tartrate-resistant acid phosphatase staining,the skeleton formation of osteoclasts was observed by F-actin staining,and the gene expression level of osteoclast formation markers was detected by RT-PCR.RESULTS AND CONCLUSION:Tartrate-resistant acid phosphatase staining results showed that puerarin intervention could inhibit the generation of osteoclasts,Notch1 silencing could further reduce the number of osteoclasts,while the number of osteoclasts in the osteoclast-induced group increased significantly after Notch1 overexpression.The results of F-actin showed that Raw264.7 cells could form a well-defined F-actin ring after osteoclast induction.Puerarin intervention would inhibit the formation of cytoskeleton,and Notch1 silencing could aggravate the inhibitory effect of cytoskeleton formation,while Notch1 overexpression could alleviate this i
作者
刘春丽
闫雨娟
莫礼文
吴志杰
张黎
Liu Chunli;Yan Yujuan;Mo Liwen;Wu Zhijie;Zhang Li(School of Stomatology,Hainan Medical University,Haikou 571101,Hainan Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2024年第35期5636-5641,共6页
Chinese Journal of Tissue Engineering Research
基金
海南省财政科技计划资助项目-海南省2020年重点研发计划社会发展专项(ZDYF2020166),项目负责人:张黎
海南省财政科技计划资助项目-海南省2023年重点研发社会发展专项(ZDYF2023SHFZ095),项目负责人:张黎。
