Cx43和Pax3在人胚胎早期小肠肌层中的表达及其意义

目的 探讨Cx43和Pax3蛋白在人胚胎早期小肠肌层组织中的表达规律.方法 应用免疫组织化学SABC法检测第2、3、4三个月龄段,Cx43和Pax3蛋白在人胚胎小肠肌层组织中的表达.结果 第2月胚龄时,Cx43和Pax3在小肠肌层组织中均呈阴性表达.第3个月胎龄段,Cx43和Pax3在小肠内环肌层细胞呈阴性表达,外纵肌层部分细胞呈阳性表达.肌间神经丛部分细胞呈阳性表达.第4个月胎龄段,Cx43和Pax3在小肠内环肌、外纵肌层和肌间神经丛均有细胞呈阳性表达.结论 Cx43和Pax3蛋白与人胚胎早期小肠肌层组织细胞的生长发育关系密切.

Expression of Cx43 and Pax3 in the small intestinal muscular layers of early human embryos

OBJECTIVE: To explore the patterns of Cx43 and Pax3 protein expressions in the small intestinal muscular layers of human embryo during early development. METHODS: Immunohistochemistry with SABC method was employed to examine the expression of Cx43 and Pax3 proteins in the muscular layers of the small intestine in early human embryos in the second to fourth months of gestation. RESULTS: In the second month of gestation, the muscle layer of the small intestine was negative for Cx43 and Pax3 protein expressions. In the third month, Cx43 and Pax3 expressions were negative in the inner circular muscle layer, but some positive cells were found in the longitudinal muscle layer and the myenteric plexus. In the fourth month, positive expression of Cx43 and Pax3 proteins were seen in the entire muscle layer. CONCLUSION: Cx43 and Pax3 proteins are closely related to the growth and development of the cells and tissues in the small intestinal muscle layer in human embryos.