کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5892240 1153302 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Osteoinductive LIM mineralization protein-1 suppresses activation of NF-κB and selectively regulates MAPK pathways in pre-osteoclasts
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی تکاملی
پیش نمایش صفحه اول مقاله
Osteoinductive LIM mineralization protein-1 suppresses activation of NF-κB and selectively regulates MAPK pathways in pre-osteoclasts
چکیده انگلیسی

LIM mineralization protein-1 (LMP-1) is an intracellular regulator of bone formation and has been shown to be osteoinductive in vitro and in vivo. The effect of LMP-1 on other aspects of bone homeostasis has not been previously studied. In a pilot study we observed that LMP-1 decreased nitric oxide (NO) production in pre-osteoclasts. Here we report a new anti-inflammatory effect of LMP-1 and define its mechanism of action in lipopolysaccharide (LPS)-stimulated RAW 264.7 pre-osteoclasts. We found that LMP-1 significantly inhibited LPS-induced NO production. LMP-1 also effectively inhibited the expression of inducible nitric oxide synthase (iNOS), potently suppressed the transcriptional activity and nuclear translocation of nuclear factor kappa B (NF-κB), and prevented the phosphorylation of inhibitor of kappa B (IκB). Interestingly, LMP-1 had no effect on Receptor-Activator of Nuclear Factor B Ligand (RANKL)-induced activation of NF-κB. Furthermore, LMP-1 had no effect on the LPS-induced phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), whereas it did attenuate the phosphorylation of c-Jun NH2-terminal kinase (JNK) while enhancing phosphorylation of p38 mitogen-activated protein kinases (p38 MAPK). These results suggest that LMP-1 has an anti-inflammatory effect, and this effect is, at least in part, due to the inhibition of NO production by the suppression of NF-κB activation and selective regulation of mitogen-activated protein kinase (MAPK) pathways.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bone - Volume 46, Issue 5, May 2010, Pages 1328-1335
نویسندگان
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