干细胞具有自我更新和分化功能,赋予机体在生命过程中始终保持造血潜能.近来研究显示,某些癌细胞群体如血液系统肿瘤、乳腺肿瘤与脑肿瘤等,也存在能自我更新和分化增殖的干细胞,即癌干细胞(CSC).这些CSC便是肿瘤生长蔓延、死灰复燃的主要原因.这些发现拓宽了肿瘤学研究的视野,对我们进一步理解肿瘤细胞和CSC生物学特性提供了有益的启示.推测在其它肿瘤中也会存在这种CSC,因此对于CSC生物学特性的深入研究及阐明它们在介导肿瘤发生中的作用机制,对今后肿瘤防治将起到巨大的推动作用.

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