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2015 ; 166
(6
): 554-67
Nephropedia Template TP
gab.com Text
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English Wikipedia
Therapeutic benefits of young, but not old, adipose-derived mesenchymal stem
cells in a chronic mouse model of bleomycin-induced pulmonary fibrosis
#MMPMID26432923
Tashiro J
; Elliot SJ
; Gerth DJ
; Xia X
; Pereira-Simon S
; Choi R
; Catanuto P
; Shahzeidi S
; Toonkel RL
; Shah RH
; El Salem F
; Glassberg MK
Transl Res
2015[Dec]; 166
(6
): 554-67
PMID26432923
show ga
The observation that pulmonary inflammatory lesions and bleomycin (BLM)-induced
pulmonary fibrosis spontaneously resolve in young mice, whereas remaining
irreversible in aged mice suggests that impairment of pulmonary regeneration and
repair is associated with aging. Because mesenchymal stem cells (MSCs) may
promote repair after injury, we postulated that differences in MSCs from aged
mice may underlie postinjury fibrosis in aging. The potential for young-donor
MSCs to inhibit BLM-induced pulmonary fibrosis in aged male mice (>22 months) has
not been studied. Adipose-derived MSCs (ASCs) from young (4 months) and old (22
months) male mice were infused 1 day after intratracheal BLM administration. At
21-day sacrifice, aged BLM mice demonstrated lung fibrosis by Ashcroft score,
collagen content, and ?(v)-integrin messenger RNA (mRNA) expression. Lung tissue
from aged BLM mice receiving young ASCs exhibited decreased fibrosis, matrix
metalloproteinase (MMP)-2 activity, oxidative stress, and markers of apoptosis vs
BLM controls. Lung mRNA expression of tumor necrosis factor-alpha was also
decreased in aged BLM mice receiving young-donor ASCs vs BLM controls. In
contrast, old-donor ASC treatment in aged BLM mice did not reduce fibrosis and
related markers. On examination of the cells, young-donor ASCs had decreased mRNA
expression of MMP-2, insulin-like growth factor (IGF) receptor, and protein
kinase B (AKT) activation compared with old-donor ASCs. These results show that
the BLM-induced pulmonary fibrosis in aged mice could be blocked by young-donor
ASCs and that the mechanisms involve changes in collagen turnover and markers of
inflammation.