快速培养纯化猪角朊细胞及复合羊膜体外培养实验研究  

EXPERIMENTAL STUDY ON PORCINE KERATINOCYTES CULTURED AND PURIFIEQ RAPIDLY AND COCULTURED ON ACELLULAR AMNION IN VITRO

作　　者：范伟杰[1] 杨志明[1] 李秀群[1] 王珍[1] 智伟[1] 邱琳[1] 

机构地区：[1]四川大学华西医院生物治疗国家重点实验室.干细胞与组织工程研究室,成都610041

出　　处：《中国修复重建外科杂志》2006年第3期282-286,共5页Chinese Journal of Reparative and Reconstructive Surgery

基　　金：国家高技术研究发展计划(863)资助项目(2001AA216011)~~

摘　　要：目的研究快速培养和纯化猪角朊细胞的方法及观察角朊细胞在脱细胞羊膜上的生长状况,为组织工程皮肤研究提供实验依据。方法采用加10%胎牛血清的人无血清角朊细胞培养基(definedkeratinocyte-SFM,DKSFM)培养原代猪角朊细胞,分别用DKSFM(A组)、加5%胎牛血清的DKSFM(B组)、加10%胎牛血清的DKSFM(C组)培养传代猪角朊细胞,于接种后1、3、5和7d观察猪角朊细胞的形态及生长曲线。利用猪角朊细胞与培养瓶黏附牢固的特点,用0.02%乙二胺四乙酸(ethylenediaminetetraaceticacid,EDTA)和0.05%胰蛋白酶分步消化,纯化细胞。将第2代猪角朊细胞接种在冻干脱细胞羊膜上,直接苏木素染色、石蜡切片、免疫组织化学染色等方法观察猪角朊细胞在脱细胞羊膜上的生长状况。结果采用加10%胎牛血清的DKSFM培养原代猪角朊细胞,细胞生长速度快,形态好,培养5d铺满培养瓶底60%～70%。B组培养的传代猪角朊细胞生长速度较C组培养猪角朊细胞生长速度快。A组培养传代的角朊细胞,细胞生长缓慢。用0.02%EDTA和0.05%胰蛋白酶分步消化的方法纯化猪角朊细胞,可获得纯度为95%以上的猪角朊细胞。将第2代猪角朊细胞接种在脱细胞羊膜后12d,可形成单层细胞,呈多角形、铺路石样排列;14d和16d细胞进一步密集,16d细胞出现老化。结论10%胎牛血清的DKSFM培养原代猪角朊细胞,5%胎牛血清的DKSFM培养传代猪角朊细胞,细胞生长速度快。用0.02%EDTA和0.05%胰蛋白酶分步消化的方法纯化猪角朊细胞,可以获得高纯度猪角朊细胞。脱细胞羊膜为猪角朊细胞提供良好的支架,接种培养后12d,细胞形态最好。Objective To explore an effective method to culture and purify porcine keratinocytes, to observe the morphological characteristics of porcine keratinocytes growing on acellular amnion and to offer the experimental basis for that the amnion is used for tissue engineering. Methods The primary porcine keratinocytes were cultivated with DKSFM （Defined keratinocyte-SFM） containing 10% fetal bovine serum （FBS）. The second passage porcine keratinocytes were cultivated with the medium of DKSFM containing different concentrations of FBS. Because of the speciality that keratinocytes stick to flask fast, we purified the keratinocytes by 0.02% EDTA and 0. 05% trypsin step by step. The second passage keratinocytes were seeded on amnion, the keratinocytes/amnion composites were observed by dye directly, histopathology and immunohistochemical staining. Results The proliferation of the primry porcine keratinocytes cultured with the medium of DKSFM containing 10% FBS was fast and the morphological characteristics were good. The cultivated porcine keratinocytes expanded to 60%-70% of the total area of the bottle of the flask after 5 days. The proliferation of the second passage porcine keratinocytes cultivated with the medium that DKSFM containing 5% FBS was faster than the second porcine keratinocytes cultured with the medium of DKSFM containing 10% FBS, or DKSFM without FBS. The proliferation of the second passage porcine keratinocytes cultivated with DKSFM without FBS was the slowest one among the 3 medium. The porcine keratinocytes that were purified by 0. 02% EDTA and 0. 05% trypsin step by step were got with high pure. After the keratinocytes were cultivated on the surface of amnion 12 days, the keratinocytes form a single layer on the surface of amnion and the cells were polygong and arranged like slabstone. After 14 and 16 days,the cells contacted more closely. But at 16 days after the cells were seeded, some of the cells got aging. Conelusion To culture primary porcine keratinocytes with the medium that DKSFM cont

关 键 词：猪角朊细胞 培养 脱细胞羊膜 复合 

分 类 号：Q813.11[生物学—生物工程] Q73