Human vascular cell responses to the circulating bone hormone osteocalcin.

Abstract:

:The purpose of this study was to characterize the direct effects of uncarboxylated osteocalcin (ucOCN) on vascular cell biology in vitro, to assess its potential function in pathophysiological conditions such as atherosclerosis. Human aortic endothelial cells (HAECs) and smooth muscle cells (HASMCs) were treated with ucOCN (0.1-50 ng/ml) and changes in phosphorylation of intracellular signaling proteins, angiogenesis, proliferation, migration, monolayer permeability, and protein secretion were measured. In HAECs, phosphorylated JNK and CREB were decreased with ucOCN (p < 0.05). In HASMCs, phosphorylated p70S6K and NF-ΚB were increased by ucOCN (p < 0.05). Cell proliferation increased in both cell types dose dependently which was blocked by AKT and ERK pathway inhibitors. ucOCN did not affect cell permeability, angiogenesis, or migration. The direct activity of ucOCN on vascular cells is recognized, particularly its proliferative effects. However, at least in physiological settings, it does not appear that osteocalcin may directly promote atherogenesis based on the outcomes measured.

journal_name

J Cell Physiol

authors

Millar SA,Anderson SI,O'sullivan SE

doi

10.1002/jcp.28707

subject

Has Abstract

pub_date

2019-11-01 00:00:00

pages

21039-21048

issue

11

eissn

0021-9541

issn

1097-4652

journal_volume

234

pub_type

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