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中文摘要：
乳腺干细胞是研究器官形成、细胞增殖、分化、生存和凋亡等信号通路的理想模型,而近来的研究发现许多成体干细胞的特异性表面标记都与细胞黏附分子(celladhesion molecule,CAM)家族相关.因此,研究胚胎期乳腺干/祖细胞群的黏附分子基因表达特点,对于纯化和鉴定胚胎期乳腺干/祖细胞具有重要指导意义.用成年小鼠乳腺上皮干细胞的标记CD24和CD49f来分选小鼠胚胎期14天乳腺原基细胞群,发现CD24+和CD49f+双阳性的乳腺原基细胞包含两个细胞群:CD24hiCD49f+细胞群和CD24medCD49f+细胞群.它们占乳腺原基总细胞的比例分别为16%和47%.在随后的细胞培养实验和体内移植再生实验中发现,CD24medCD49f+细胞群可以贴壁,而且具有再生乳腺导管的能力,相反,CD24hiCD49f+细胞群既不能贴壁也不具有移植再生能力.这些结果表明,这两个细胞群分别代表不同的细胞类型,而CD24medCD49f+细胞群有可能包含具有自我更新能力的乳腺原基干/祖细胞.挑选了可能与乳腺相关的19个黏附分子,并对这两群细胞进行了定量PCR检测.结果表明,具有乳腺导管重建能力的CD24medCD49f+细...
英文摘要：
Mammary stem cells (MaSCs) is an ideal model for studies of organogenesis, cell proliferation, differentiation, survival and apoptosis. Recent researches showed that many adult stem cell surface markers belonged to cell adhesion molecule (CAM) family. Therefore, analysis of relationship between mammary stem/progenitor cells and the expression pattern of CAM have directive meanings for identifying embryonic mammary stem/progenitor cells and understanding their properties. Here, cells in E14 mouse mammary anl...
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