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Brief Definite Report

The 12/15-lipoxygenase pathway promotes osteoclast development and differentiation

Brief Definite Report

, , &
Pages 383-385 | Received 28 Dec 2008, Accepted 07 Jan 2009, Published online: 13 Aug 2009
 

Abstract

Although 12/15-lipoxygenase (12/15-LO) has been implicated as negative regulator of systemic bone mass in mice and humans, the underlying mechanisms remain elusive. Here, we show that 12/15-LO is a positive regulator of osteoclast (OC) development. Enzymatic inhibition as well as genetic ablation of 12/15-LO significantly impaired osteoclastogenesis. Conversely, addition of the 12/15-LO-derived eicosanoids 12- and 15-HETE augmented differentiation of precursors into fully matured OCs. Together these data point towards a crucial role of 12/15-LO in the regulation of OC development. Therefore, 12/15-LO and its human homologue 15-LO may display novel targets for the treatment of diseases such as osteoporosis and rheumatoid arthritis.

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