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2015 ; 23
(3
): 549-60
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Mesenchymal stem cells correct inappropriate epithelial-mesenchyme relation in
pulmonary fibrosis using stanniocalcin-1
#MMPMID25373521
Ono M
; Ohkouchi S
; Kanehira M
; Tode N
; Kobayashi M
; Ebina M
; Nukiwa T
; Irokawa T
; Ogawa H
; Akaike T
; Okada Y
; Kurosawa H
; Kikuchi T
; Ichinose M
Mol Ther
2015[Mar]; 23
(3
): 549-60
PMID25373521
show ga
Current hypotheses suggest that aberrant wound healing has a critical role in the
pathogenesis of idiopathic pulmonary fibrosis (IPF). In these hypotheses,
continuous TGF-?1 secretion by alveolar epithelial cells (AECs) in abnormal wound
healing has a critical role in promoting fibroblast differentiation into
myofibroblasts. Mesenchymal stem cells (MSCs) home to the injury site and reduce
fibrosis by secreting multifunctional antifibrotic humoral factors in IPF. In
this study, we show that MSCs can correct the inadequate-communication between
epithelial and mesenchymal cells through STC1 (Stanniocalcin-1) secretion in a
bleomycin-induced IPF model. Inhalation of recombinant STC1 shows the same
effects as the injection of MSCs. Using STC1 plasmid, it was possible to enhance
the ability of MSCs to ameliorate the fibrosis. MSCs secrete large amounts of
STC1 in response to TGF-?1 in comparison to AECs and fibroblasts. The
antifibrotic effects of STC1 include reducing oxidative stress, endoplasmic
reticulum (ER) stress, and TGF-?1 production in AECs. The STC1 effects can be
controlled by blocking uncoupling protein 2 (UCP2) and the secretion is affected
by the PI3/AKT/mTORC1 inhibitors. Our findings suggest that STC1 tends to correct
the inappropriate epithelial-mesenchymal relationships and that STC1 plasmid
transfected to MSCs or STC1 inhalation could become promising treatments for IPF.