家兔脂肪基质干细胞的分离培养及多向分化诱导

背景:脂肪基质干细胞在人体皮下脂肪中储备充足,体外能快速增殖,具有多向分化潜能,是目前组织工程种子细胞的研究热点.目的:体外分离培养家兔脂肪血管基质部分细胞,并验证其具有多分化潜能.方法:体外分离家兔脂肪血管基质部分细胞,在标准条件下培养,流式细胞仪检测第3代血管基质部分细胞表面标记物CD44,CD29,CD45,取第3代血管基质部分细胞进行成脂、成骨、成软骨诱导,油红O染色鉴定成脂诱导,碱性磷酸酶染色、茜索红染色,Von kossa染色鉴定成骨诱导,Ⅱ型胶原免疫组织化学染色和Ⅱ型胶原mRNA RT-PCR检测鉴定成软骨诱导.结果与结论:原代血管基质部分细胞为短梭形和多角形,第3代血管基质部分细胞为长梭形,流式细胞仪检测提示CD44+,CD29+,CD45,成脂诱导组,染色油红O阳性,成骨诱导组,碱性磷酸酶染色、Vonkossa染色、茜素红染色阳性,成软骨诱导组,诱导14 d Ⅱ型胶原免疫组织化学染色阿利新蓝染色阳性,RT-PCR检测Ⅱ型胶原mRNA显示产物条带较未诱导前信号明显增强.提示体外分离培养的家兔血管基质部分细胞具有干细胞表型,具有向成骨、软骨、脂肪细胞分化的能力,初步鉴定为脂肪基质干细胞.

Isolation,culture and multi-directional induced differentiation of rabbit adipose derived stromal stem cells

BACKGROUND:Subcutaneous fat of human body is a rich reservoir of adipose derived stromal stem cells(ADSCs).ADSCs can proliferate rapidly when being cultured in vitro,and has the capacity of multi-directional differentiation.ADSCs attracted much attention in research of tissue engineered seed cells.OBJECTIVE:To isolate and culture stromal vascular fraction(SVF) cells from rabbit subcutaneous fat in vitro,and to testify whether it has multiple differentiation capacity.METHODS:SVF cells were isolated in vitro ...