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2018 ; 6
(ä): 9
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Omentin-1 prevents inflammation-induced osteoporosis by downregulating the
pro-inflammatory cytokines
#MMPMID29619269
Rao SS
; Hu Y
; Xie PL
; Cao J
; Wang ZX
; Liu JH
; Yin H
; Huang J
; Tan YJ
; Luo J
; Luo MJ
; Tang SY
; Chen TH
; Yuan LQ
; Liao EY
; Xu R
; Liu ZZ
; Chen CY
; Xie H
Bone Res
2018[]; 6
(ä): 9
PMID29619269
show ga
Osteoporosis is a frequent complication of chronic inflammatory diseases and
increases in the pro-inflammatory cytokines make an important contribution to
bone loss by promoting bone resorption and impairing bone formation. Omentin-1 is
a newly identified adipocytokine that has anti-inflammatory effects, but little
is known about the role of omentin-1 in inflammatory osteoporosis. Here we
generated global omentin-1 knockout (omentin-1(-/-)) mice and demonstrated that
depletion of omentin-1 induces inflammatory bone loss-like phenotypes in mice, as
defined by abnormally elevated pro-inflammatory cytokines, increased osteoclast
formation and bone tissue destruction, as well as impaired osteogenic activities.
Using an inflammatory cell model induced by tumor necrosis factor-? (TNF-?), we
determined that recombinant omentin-1 reduces the production of pro-inflammatory
factors in the TNF-?-activated macrophages, and suppresses their
anti-osteoblastic and pro-osteoclastic abilities. In the magnesium
silicate-induced inflammatory osteoporosis mouse model, the systemic
administration of adenoviral-delivered omentin-1 significantly protects from
osteoporotic bone loss and inflammation. Our study suggests that omentin-1 can be
used as a promising therapeutic agent for the prevention or treatment of
inflammatory bone diseases by downregulating the pro-inflammatory cytokines.