Regulation of bFGF-induced effects on rat aortic smooth muscle cells by β3-adrenergic receptors.
CURRENT RESEARCH IN PHARMACOLOGY AND DRUG DISCOVERY 2022;
3:100094. [PMID:
35300074 PMCID:
PMC8920869 DOI:
10.1016/j.crphar.2022.100094]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/21/2022] [Accepted: 02/25/2022] [Indexed: 01/08/2023] Open
Abstract
Background
Basic fibroblast growth factor (bFGF)-mediated vascular smooth muscle cell (VSMC) proliferation and migration play an important role in vascular injury-induced neointima formation and subsequent vascular restenosis, a major event that hinders the long-term success of angioplasty. The function of β3-adrenergic receptors (β3-ARs) in vascular injury-induced neointima formation has not yet been defined.
Objectives
Our current study explored the possible role of β3-ARs in vascular injury-induced neointima formation by testing its effects on bFGF-induced VSMC migration and proliferation.
Methods
β3-AR expression in rat carotid arteries was examined at 14 days following a balloon catheter-induced injury. The effects of β3-AR activation on bFGF-induced rat aortic smooth muscle cell proliferation, migration, and signaling transduction (including extracellular-signal-regulated kinase/mitogen activated protein kinase, ERK/MAPK and Protein kinase B, AKT) were tested.
Results
We found that vascular injury induced upregulation of β3-ARs in neointima. Pretreatment of VSMCs with a selective β3-AR agonist, CL316,243 significantly potentiated bFGF-induced cell migration and proliferation, and ERK and AKT phosphorylation. Our results also revealed that suppressing phosphorylation of ERK and AKT blocked bFGF-induced cell migration and that inhibiting AKT phosphorylation reduced bFGF-mediated cell proliferation.
Conclusion
Our results suggest that activation of β3-ARs potentiates bFGF-mediated effects on VSMCs by enhancing bFGF-mediated ERK and AKT phosphorylation and that β3-ARs may play a role in vascular injury-induced neointima formation.
β3-adrenergic receptor (β3-AR) expression was upregulated in the newly formed intima following rat carotid artery injury.
Activation of β3-ARs potentiated bFGF-induced VSMC migration and proliferation and phosphorylation of ERK and/or AKT.
Inhibition of ERK or AKT pathways decreased bFGF-induced cell migration.
Inhibition of AKT pathway decreased bFGF-induced cell proliferation.
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