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2016 ; 28
(4
): 197-208
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Leptin deficiency down-regulates IL-23 production in glomerular podocytes
resulting in an attenuated immune response in nephrotoxic serum nephritis
#MMPMID26567290
Goto K
; Kaneko Y
; Sato Y
; Otsuka T
; Yamamoto S
; Goto S
; Yamamoto K
; Yamamoto T
; Kawachi H
; Madaio MP
; Narita I
Int Immunol
2016[Apr]; 28
(4
): 197-208
PMID26567290
show ga
Leptin, one of the typical adipokines, is reported to promote Th17 cell responses
and to enhance production of proinflammatory cytokines. To clarify the role of
leptin in the regulation of the IL-23/IL-17 axis and the development of kidney
disease, we used a murine model of nephrotoxic serum (NTS) nephritis (NTN). Sheep
NTS was administered in wild-type C57BL/6J mice and food-restricted,
leptin-deficient C57BL/6J-ob/ob(FR-ob/ob) mice after preimmunization with sheep
IgG. The profile of mRNA expression relevant to T helper lymphocytes in the
kidneys was analyzed by quantitative real-time PCR (qRT-PCR). Cultured murine
glomerular podocytes and peritoneal exudate macrophages (PEMs) were used to
investigate the direct effect of leptin on IL-23 or MCP-1 production by qRT-PCR.
Kidney injury and macrophage infiltration were significantly attenuated in
FR-ob/obmice 7 days after NTS injection. The Th17-dependent secondary immune
response against deposited NTS in the glomeruli was totally impaired in
FR-ob/obmice because of deteriorated IL-17 and proinflammatory cytokine
production including IL-23 and MCP-1 in the kidney. IL-23 was produced in
glomerular podocytes in NTN mice and cultured murine glomerular podocytes
produced IL-23 under leptin stimulation. MCP-1 production in PEMs was also
promoted by leptin. Induction of MCP-1 expression was observed in PEMs regardless
of Ob-Rb, and the leptin signal was transduced without STAT3 phosphorylation in
PEMs. Leptin deficiency impairs the secondary immune response against NTS and
down-regulates IL-23 production and Th17 responses in the NTN kidney, which is
accompanied by decreased MCP-1 production and macrophage infiltration in the NTN
kidney.