STIMULATION OF GROWTH OF HUMAN BREAST-CANCER CELLS (T47D) BY PLATELET DERIVED GROWTH-FACTOR

被引:19
作者
GINSBURG, E [1 ]
VONDERHAAR, BK [1 ]
机构
[1] NCI, TUMOR IMMUNOL & BIOL LAB, BLDG 10, ROOM 5B56, BETHESDA, MD 20892 USA
关键词
BREAST CELLS; T47D; PLATELET DERIVED GROWTH FACTOR; MCF-7;
D O I
10.1016/0304-3835(91)90036-H
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The human breast cancer cell lines T47D and MCF-7, respond to the mitogenic action of exogenously added PDGF with a 2 - 3-fold increase in cell number. The maximal response was obtained at a concentration of 1.25 half maximal units/ml (125 ng/ml). PDGF-AA was even more effective than PDGF-AB while PDGF-BB was without effect. The growth-enhancing activity of PDGF was completely abolished by Fab fragments of anti PDGF. Within 7 min of addition of PDGF to cultures of T47D cells, specific phosphorylation of a 65-kDa protein was observed. T47D cells contain specific receptors for PDGF with approximately 4-7 x 10(4) sites (kDa of 3-4 x 10(-10) M) per cell.
引用
收藏
页码:137 / 144
页数:8
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