Wu Weijiang, Wang Zhe, Zhang Zhijian, Yang Wenjing, Fan Xin, Xu Jili, Huang Zhiqiang, Shao Qixiang
Department of Immunology, Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, People's Republic of China.
Department of Histology and Embryology, School of Medicine, Jiangsu University, Zhenjiang, 212001, Jiangsu, People's Republic of China.
Cell Tissue Bank. 2022 Sep;23(3):569-580. doi: 10.1007/s10561-022-09994-4. Epub 2022 Feb 11.
Ectoderm-derived mesenchymal stem cells (EMSCs) were used as potential seed cells for bone tissue engineering to treat bone defects due to their capability of rapid proliferation and osteogenic differentiation. Sonic hedgehog (Shh) signaling was reported to play an important role in the development of bone tissue, but its role is not understood. The present study investigated the role of Shh molecule in osteogenic differentiation of rat EMSCs in vitro. Rat EMSCs were isolated form nasal respiratory mucosa and identified with immunofluorescence and analyzed with other methods, including reverse transcriptase polymerase chain reaction (qPCR) and western blotting. EMSCs expressed CD90, CD105, nestin, and vimentin. On the seventh day of osteogenic induction, expression levels of Shh and Gli1 was higher according to the result of qPCR and Western blotting. After induction for 14 days, higher alkaline phosphatase (ALP) activity and more mineralized nodules were seen in comparison to the cells that did not undergo induction. Shh signaling appears to enhance osteogenic differentiation of rat EMSCs, suggesting that Shh signaling directs the lineage differentiation of ectodermal stem cells and represents a promising strategy for skeletal tissue regeneration.
外胚层来源的间充质干细胞(EMSCs)因其快速增殖和成骨分化能力,被用作骨组织工程的潜在种子细胞来治疗骨缺损。据报道, Sonic hedgehog(Shh)信号在骨组织发育中起重要作用,但其作用尚不清楚。本研究探讨了Shh分子在大鼠EMSCs体外成骨分化中的作用。从鼻呼吸黏膜分离大鼠EMSCs,用免疫荧光法鉴定,并用逆转录聚合酶链反应(qPCR)和蛋白质免疫印迹法等其他方法进行分析。EMSCs表达CD90、CD105、巢蛋白和波形蛋白。根据qPCR和蛋白质免疫印迹结果,在成骨诱导第7天,Shh和Gli1的表达水平较高。诱导14天后,与未诱导的细胞相比,可见更高的碱性磷酸酶(ALP)活性和更多的矿化结节。Shh信号似乎增强了大鼠EMSCs的成骨分化,提示Shh信号指导外胚层干细胞的谱系分化,是一种有前景的骨骼组织再生策略。