ANGIOTENSIN-II AND NORADRENALINE INCREASE PDGF-BB RECEPTORS AND POTENTIATE PDGF-BB STIMULATED DNA-SYNTHESIS IN VASCULAR SMOOTH-MUSCLE

被引：79
作者：
BOBIK, A [1 ]
GRINPUKEL, S [1 ]
LITTLE, PJ [1 ]
GROOMS, A [1 ]
JACKMAN, G [1 ]
机构：
[1] ALFRED HOSP,CLIN RES UNIT,PRAHRAN,VIC 3181,AUSTRALIA
来源：
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 1990年 / 166卷 / 02期
关键词：
D O I：
10.1016/0006-291X(90)90848-H
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The effects of angiotensin II and noradrenaline were examined on PDGF-BB and PDGF-AB induced mitogenesis in primary cultures of rat aortic smooth muscle. Incubation of the smooth muscle with either angiotensin II or noradrenaline potentiated the submaximal but not maximal mitogenic effects of PDGF-BB but not PDGF-AB. These effects on PDGF-BB stimulated mitogenesis correlated with an increase in receptor number specific for this homodimer when the smooth muscle was incubated with either angiotensin II or noradrenaline. Mitogenic concentrations of PDGF-AB did not interact with this PDGF receptor subtype. These results indicate that the mitogenic effects of PDGF-AB and -BB are elicited via different PDGF receptor subtypes. Angiotensin II and noradrenaline potentiate the mitogenic effects of PDGF-BB by increasing the steady state concentrations of membrane receptors for this homodimer. © 1990.
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页码：580 / 588
页数：9
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