中文摘要：

本研究旨在建立山羊瘤胃平滑肌细胞的体外培养模型。采集42日龄山羊的瘤胃肌肉组织,采用胶原酶消化法进行了山羊瘤胃平滑肌细胞的体外培养。通过光学显微镜观察了原代培养和传代培养阶段的细胞形态,采用细胞计数法检测了第5代山羊瘤胃平滑肌细胞的生长曲线及第1-11代细胞生长活性,采用细胞免疫荧光法对细胞进行了鉴定,采用蛋白质印迹（Western blotting）技术检测平滑肌细胞特异表达的α肌动蛋白（α-actin）在各代次细胞中的表达。结果表明,经0.20%Ⅱ型胶原酶消化获得的原代培养山羊瘤胃平滑肌细胞于培养1 d后开始贴壁生长,2 d开始进入对数期生长,呈典型的＂波峰＂状生长,5 d进入平台期,第5代细胞生长活性达到最高;免疫荧光染色显示胞浆内α-actin阳性表达,各代次间细胞α-actin表达稳定,表达量无显著差异（P〉0.05）。试验表明,应用0.20%Ⅱ型胶原酶消化法可成功获得山羊瘤胃平滑肌细胞,为进一步研究营养物质对山羊瘤胃功能的影响提供了理想的细胞模型。

英文摘要：

The present study was carried out to establish a culture method for ruminal smooth muscle cells of goat. Ruminal smooth muscle tissue of goats（ 42 days of age） was collected,and ruminal smooth muscle cells was cultured in vitro by the method of collagenase digestion. The morphology of cells at the stages of primary culture and subculture was observed under the optical microscope,the growth curve of the 5 th generation and the growth activity curve of generations of ruminal smooth muscle cells were tested using the cell counting method. Meanwhile,the ruminal smooth muscle cells were identified using cell immune fluorescence method,and the expression of α-actin in generations（ 1 st to 11 th） cells was detected using the Western blotting. The results showed that the primary cultured ruminal smooth muscle cells of goats obtained by digestion of 0. 20 %type Ⅱ collagenase began adherent growth after cultured for 1 day,an exponential growth started on the 2 nd day resembling a ＂hill＂in appearance,the curve stated plateau phase on the 5 th day,and the growth activity of cells reach the highest in the 5 th generation. The α-actin in the cytoplasm exhibited a positive reaction by immune fluorescence staining and the protein expressed stable,no significant difference in generations was found（ P〉0. 05）. The results demonstrate that ruminal smooth muscle cells of goats were obtained successfully by the methods of 0. 20 % type Ⅱ collagenase digestion,which provides an ideal cell model for the further study on the effects of nutrients on goats＇ rumen function.