Cytokine-activated endothelium recruits osteoclast precursors.

Abstract:

:Osteoclast precursors reach sites of osteoclast formation and remodelling via the vasculature and are therefore destined to encounter endothelium before migrating to the bone surface. Here we investigated the hypothesis that endothelium may be involved in the regulation of osteoclast precursor recruitment to sites of bone resorption. Osteoclast precursors in human peripheral blood were identified by their ability to form mature osteoclasts in 21-day cultures supplemented with RANKLigand, M-CSF, 1,25(OH)(2)-vitamin D(3), dexamethasone and prostaglandin E(2). Under control conditions few osteoclast precursors adhered to endothelial cells (the human bone marrow-derived endothelial cell line BMEC-1). However, BMEC-1 cells treated with the resorption stimulating cytokines IL-1beta and TNFalpha depleted the PBMC population of all osteoclast precursors. These results provide the first evidence that osteoclast precursors can adhere to endothelium and suggest that endothelium could play an important role in the recruitment of osteoclast precursors to sites of bone resorption.

journal_name

Endocrinology

journal_title

Endocrinology

authors

McGowan NW,Walker EJ,Macpherson H,Ralston SH,Helfrich MH

doi

10.1210/endo.142.4.8204

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

1678-81

issue

4

eissn

0013-7227

issn

1945-7170

journal_volume

142

pub_type

杂志文章