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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2016 ; 11
(3
): e0150471
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Alpha8 Integrin (Itga8) Signalling Attenuates Chronic Renal Interstitial Fibrosis
by Reducing Fibroblast Activation, Not by Interfering with Regulation of Cell
Turnover
#MMPMID26938996
Marek I
; Lichtneger T
; Cordasic N
; Hilgers KF
; Volkert G
; Fahlbusch F
; Rascher W
; Hartner A
; Menendez-Castro C
PLoS One
2016[]; 11
(3
): e0150471
PMID26938996
show ga
The ?8 integrin (Itga8) chain contributes to the regulation of cell proliferation
and apoptosis in renal glomerular cells. In unilateral ureteral obstruction Itga8
is de novo expressed in the tubulointerstitium and a deficiency of Itga8 results
in more severe renal fibrosis after unilateral ureteral obstruction. We
hypothesized that the increased tubulointerstitial damage after unilateral
ureteral obstruction observed in mice deficient for Itga8 is associated with
altered tubulointerstitial cell turnover and apoptotic mechanisms resulting from
the lack of Itga8 in cells of the tubulointerstitium. Induction of unilateral
ureteral obstruction was achieved by ligation of the right ureter in mice lacking
Itga8. Unilateral ureteral obstruction increased proliferation and apoptosis
rates of tubuloepithelial and interstitial cells, however, no differences were
observed in the tubulointerstitium of mice lacking Itga8 and wild type controls
regarding fibroblast or proliferating cell numbers as well as markers of
endoplasmic reticulum stress and apoptosis after unilateral ureteral obstruction.
In contrast, unilateral ureteral obstruction in mice lacking Itga8 led to more
pronounced tubulointerstitial cell activation i.e. to the appearance of more
phospho-SMAD2/3-positive cells and more ?-smooth muscle actin-positive cells in
the tubulointerstitium. Furthermore, a more severe macrophage and T-cell
infiltration was observed in these animals compared to controls. Thus, Itga8
seems to attenuate tubulointerstitial fibrosis in unilateral ureteral obstruction
not via regulation of cell turnover, but via regulation of TGF-? signalling,
fibroblast activation and/or immune cell infiltration.
|*Gene Expression Regulation
[MESH]
|Animals
[MESH]
|Apoptosis
[MESH]
|Cell Proliferation
[MESH]
|Endoplasmic Reticulum/metabolism
[MESH]
|Fibroblasts/*metabolism
[MESH]
|Fibrosis/pathology
[MESH]
|Homozygote
[MESH]
|Inflammation
[MESH]
|Inhibitor of Apoptosis Proteins/metabolism
[MESH]