Abstract

目的 探讨如何去除人类长段粗大神经中的细胞.为构建人类组织工程化神经提供具有仿生结构的支架.方法取4段长10 cm、直径6 mm人的胫神经,其中3段用3%三硝基甲苯和4%脱氧胆酸钠分别萃取1、2和3次,在萃取神经和未萃取神经的中段取材,行HE染色、砂罗铬花青染色和S-100免疫组化染色,在光镜和电镜下观察神经萃取前后形态学的变化.结果用三硝基甲苯和脱氧胆酸钠萃取后,胫神经内的细胞消失,而纤维性支架结构与未经萃取的神经相仿,电镜下可见萃取后的神经由空的神经基底膜管和管之间的胶原纤维构成.随着萃取次数的增加,神经内残留的S-100蛋白显著减少,但反复萃取后神经的支架结构受破坏.结论用三硝基甲苯和脱氧胆酸钠萃取2次可去除人体长段、粗大神经的细胞而保留完整的神经基底膜管和纤维支架结构,可能是制备具有仿生结构的人类组织工程化神经支架较为理想的方法。

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