Differences in mitogenic responses to angiotensin II, calf serum and phorbol ester in vascular smooth muscle cells from two strains of genetically hypertensive rat.

Abstract:

:Vascular smooth muscle cells cultured from spontaneously hypertensive (SHR), New Zealand genetically hypertensive (GH) rat strains and their control strains (Wistar-Kyoto (WKY) and normal Wistar (N) rats) were compared for mitogenic responses [( 3H]-thymidine incorporation) to angiotensin II (AII), fetal calf serum (FCS), and the phorbol ester 12-O-tetradecanoyl-phorbol-13-acetate (TPA). SHR cells showed enhanced basal [3H]-thymidine incorporation and increased responses to all three factors. In contrast, basal and FCS-stimulated [3H]-thymidine incorporation was the same or less in GH than in N cells. However, DNA synthesis was greater in GH cells in response to AII, AII + TPA or FCS + TPA. These results suggest that vascular smooth muscle cells from both hypertensive rat strains display enhanced mitogenesis, but the enhancement occurs via different intracellular signalling pathways.

authors

Harris EL,Grigor MR,Millar JA

doi

10.1016/0006-291x(90)90528-u

subject

Has Abstract

pub_date

1990-08-16 00:00:00

pages

1249-55

issue

3

eissn

0006-291X

issn

1090-2104

pii

0006-291X(90)90528-U

journal_volume

170

pub_type

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