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Metallothionein protects bone marrow stromal cells against hydrogen peroxide-induced inhibition of osteoblastic differentiation.

Abstract：

:Metallothionein (MT), a cysteine-rich, metal-binding protein, is involved in homeostatic regulation of essential metals and protection of cells against oxidative injury. It has been shown that oxidative stress is associated with pathogenesis of osteoporosis and is capable of inhibiting osteoblastic differentiation of bone cells by nuclear factor-kappaB (NF-kappaB). In this study, the effect of MT on oxidative stress-induced inhibition of osteoblast differentiation was examined. 50-200 microM hydrogen peroxide-induced oxidative stress suppressed the osteoblastic differentiation process of primary mouse bone marrow stromal cells (BMSCs), manifested by a reduction in the differentiation marker alkaline phosphatase (ALP). The presence of exogenous MT (20-500 microM) or induction of endogenous MT by ZnCl2 (50-200 microM) could protect BMSCs against H2O2-induced inhibition of osteoblastic differentiation, manifested by a resumption of H2O2-inhibited ALP activity and ALP positive cells. Furthermore, adding exogenous MT or inducing endogenous MT expression impaired H2O2-stimulated NF-kappaB signaling. These data indicate the ability of MT to protect BMSCs against oxidative stress-induced inhibition of osteoblastic differentiation.

journal_name

Cell Biol Int

journal_title

Cell biology international

authors

Liu AL,Zhang ZM,Zhu BF,Liao ZH,Liu Z

doi

10.1016/j.cellbi.2004.09.004

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

905-11

issue

12

eissn

1065-6995

issn

1095-8355

pii

S1065-6995(04)00173-8

journal_volume

28

pub_type

杂志文章

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