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. 1996 Jan 15;97(2):508–514. doi: 10.1172/JCI118442

Acute hypertension activates mitogen-activated protein kinases in arterial wall.

Q Xu 1, Y Liu 1, M Gorospe 1, R Udelsman 1, N J Holbrook 1
PMCID: PMC507044  PMID: 8567974

Abstract

Mitogen-activated protein (MAP) kinases are rapidly activated in cells stimulated with various extracellular signals by dual phosphorylation of tyrosine and threonine residues. They are thought to play a pivotal role in transmitting transmembrane signals required for cell growth and differentiation. Herein we provide evidence that two distinct classes of MAP kinases, the extracellular signal-regulated kinases (ERK) and the c-Jun NH2-terminal kinases (JNK), are transiently activated in rat arteries (aorta, carotid and femoral arteries) in response to an acute elevation in blood pressure induced by either restraint or administration of hypertensive agents (i.e., phenylephrine and angiotensin II). Kinase activation is followed by an increase in c-fos and c-jun gene expression and enhanced activating protein 1 (AP-1) DNA-binding activity. Activation of ERK and JNK could contribute to smooth muscle cell hypertrophy/hyperplasia during arterial remodeling due to frequent and/or persistent elevations in blood pressure.

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Selected References

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