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2015 ; 48
(11
): 636-41
Nephropedia Template TP
gab.com Text
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English Wikipedia
N-acetyl cysteine inhibits H2O2-mediated reduction in the mineralization of
MC3T3-E1 cells by down-regulating Nrf2/HO-1 pathway
#MMPMID26303969
Lee D
; Kook SH
; Ji H
; Lee SA
; Choi KC
; Lee KY
; Lee JC
BMB Rep
2015[Nov]; 48
(11
): 636-41
PMID26303969
show ga
There are controversial findings regarding the roles of nuclear factor
(erythroid-derived 2)-like 2 (Nrf2)/heme oxygenase-1 (HO-1) pathway on bone
metabolism under oxidative stress. We investigated how Nrf2/HO-1 pathway affects
osteoblast differentiation of MC3T3-E1 cells in response to hydrogen peroxide
(H2O2), N-acetyl cysteine (NAC), or both. Exposing the cells to H2O2 decreased
the alkaline phosphatase activity, calcium accumulation, and expression of
osteoblast markers, such as osteocalcin and runt-related transcription factor-2.
In contrast, H2O2 treatment increased the expression of Nrf2 and HO-1 in the
cells. Treatment with hemin, a chemical HO-1 inducer, mimicked the inhibitory
effect of H2O2 on osteoblast differentiation by increasing the HO-1 expression
and decreasing the osteogenic marker genes. Pretreatment with NAC restored all
changes induced by H2O2 to near normal levels in the cells. Collectively, our
findings suggest that H2O2-mediated activation of Nrf2/HO-1 pathway negatively
regulates the osteoblast differentiation, which is inhibited by NAC.
|3T3 Cells
[MESH]
|Acetylcysteine/*pharmacology/*therapeutic use
[MESH]