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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 BMC+Nephrol
2017 ; 18
(1
): 287
Nephropedia Template TP
gab.com Text
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English Wikipedia
Indoleamine 2, 3-dioxygenase (IDO) increases during renal fibrogenesis and its
inhibition potentiates TGF-? 1-induced epithelial to mesenchymal transition
#MMPMID28877670
Matheus LHG
; Simão GM
; Amaral TA
; Brito RBO
; Malta CS
; Matos YST
; Santana AC
; Rodrigues GGC
; Albejante MC
; Bach EE
; Dalboni MA
; Camacho CP
; Dellê H
BMC Nephrol
2017[Sep]; 18
(1
): 287
PMID28877670
show ga
BACKGROUND: Indoleamine 2, 3-dioxygenase (IDO) is an immunomodulatory molecule
that has been implicated in several biological processes. Although IDO has been
linked with some renal diseases, its role in renal fibrosis is still unclear.
Because IDO may be modulated by TGF-?1, a potent fibrogenic molecule, we
hypothesized that IDO could be involved in renal fibrosis, especially acting in
the TGF-?1-induced tubular epithelial-mesenchymal transition (EMT). We analyzed
the IDO expression and activity in a model of renal fibrogenesis, and the effect
of the IDO inhibitor 1-methyl-tryptophan (MT) on TGF-?1-induced EMT using tubular
cell culture. METHODS: Male Wistar rats where submited to 7 days of UUO.
Non-obstructed kidneys (CL) and kidneys from SHAM rats were used as controls.
Masson's Tricrome and macrophages counting were used to chatacterize the tissue
fibrosis. The EMT was analysed though immunohistochemistry and qRT-PCR.
Immunohistochemestry in tissue has used to show IDO expression. MDCK cells were
incubated with TGF- ?1 to analyse IDO expression. Additionally, effects of TGF-
?1 and the inhibition of IDO over the EMT process was acessed by immunoessays and
scrath wound essay. RESULTS: IDO was markedly expressed in cortical and medular
tubules of the UUO kidneys. Similarly to the immunolocalizaton of TGF- ?1,
accompanied by loss of e-cadherin expression and an increase of mesenchymal
markers. Results in vitro with MDCK cells, showed that IDO was increased after
stimulus with TGF-?1, and treatment with MT potentiated its expression. MDCK
stimulated with TGF-?1 had higher migratory activity (scratch-wound assay), which
was exacerbated by MT treatment. CONCLUSIONS: IDO is constitutively expressed in
tubular cells and increases during renal fibrogenesis. Although IDO is induced by
TGF-?1 in tubular cells, its chemical inhibitor acts as a profibrotic agent.