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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 J+Biol+Chem
2014 ; 289
(25
): 17515-28
Nephropedia Template TP
gab.com Text
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English Wikipedia
Caerulomycin A enhances transforming growth factor-? (TGF-?)-Smad3 protein
signaling by suppressing interferon-? (IFN-?)-signal transducer and activator of
transcription 1 (STAT1) protein signaling to expand regulatory T cells (Tregs)
#MMPMID24811173
Gurram RK
; Kujur W
; Maurya SK
; Agrewala JN
J Biol Chem
2014[Jun]; 289
(25
): 17515-28
PMID24811173
show ga
Cytokines play a very important role in the regulation of immune homeostasis.
Regulatory T cells (Tregs) responsible for the generation of peripheral tolerance
are under the tight regulation of the cytokine milieu. In this study, we report a
novel role of a bipyridyl compound, Caerulomycin A (CaeA), in inducing the
generation of Tregs. It was observed that CaeA substantially up-regulated the
pool of Tregs, as evidenced by an increased frequency of CD4(+) Foxp3(+) cells.
In addition, CaeA significantly suppressed the number of Th1 and Th17 cells, as
supported by a decreased percentage of CD4(+)/IFN-?(+) and CD4(+)/IL-17(+) cells,
respectively. Furthermore, we established the mechanism and observed that CaeA
interfered with IFN-?-induced STAT1 signaling by augmenting SOCS1 expression. An
increase in the TGF-?-mediated Smad3 activity was also noted. Furthermore, CaeA
rescued Tregs from IFN-?-induced inhibition. These results were corroborated by
blocking Smad3 activity, which abolished the CaeA-facilitated generation of
Tregs. In essence, our results indicate a novel role of CaeA in inducing the
generation of Tregs. This finding suggests that CaeA has enough potential to be
considered as a potent future drug for the treatment of autoimmunity.