细胞增殖标志物(Proliferation Marker)
Ki67与PCNA一样,为细胞增殖的一种标记,在细胞凋亡中S、G2 、M期均有表达,G0期缺如。
Ki-67增殖指数高低与许多肿瘤的分化程度、浸润、转移以及预后密切相关,因此被广泛作为各种恶性肿瘤的必检项目之一。
Ki67 antigen is the prototypic cell cycle related nuclear protein, expressed by proliferating cells in all phases of the active cell cycle (G1, S, G2 and M phase). It is absent in resting (G0) cells. Ki67 antibodies are useful in establishing the cell growing fraction in neoplasms (immunohistochemically quantified by determining the number of Ki67 positive cells among the total number of resting cells = Ki67 index). In neoplastic tissues the prognostic value is comparable to the tritiated thymidine labelling index. The correlation between low Ki67 index and histologically low grade tumours is strong. Ki67 is routinely used as a neuronal marker of cell cycling and proliferation.
mol wt:358kDa
Other Aliases: Antigen identified by monoclonal antibody Ki 67; Antigen KI67; KIA; Ki-67; MKI67; Proliferation related Ki 67 antigen