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2016 ; 7
(17
): 24361-73
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
EGFR mediates hyperlipidemia-induced renal injury via regulating inflammation and
oxidative stress: the detrimental role and mechanism of EGFR activation
#MMPMID27014908
Fang Q
; Zou C
; Zhong P
; Lin F
; Li W
; Wang L
; Zhang Y
; Zheng C
; Wang Y
; Li X
; Liang G
Oncotarget
2016[Apr]; 7
(17
): 24361-73
PMID27014908
show ga
Previous studies have implicated inflammation, oxidative stress, and fibrosis as
key factors in the development of obesity-induced kidney diseases. Epidermal
growth factor receptor (EGFR) plays an important role in cancer development.
Recently, the EGFR pathway has been increasingly implicated in chronic
cardiovascular diseases via regulating inflammation and oxidative stress.
However, it is unclear if EGFR is involved in obesity-related kidney injury.
Using ApoE-/- and C57BL/6 mice models and two specific EGFR inhibitors, we
investigated the potential effects of EGFR inhibition in the treatment of
obesity-related nephropathy and found that EGFR inhibition alleviates renal
inflammation, oxidative stress and fibrosis. In NRK-52E cells, we also elucidated
the mechanism behind hyperlipidemia-induced EGFR activation. We observed that
c-Src and EGFR forms a complex, and following PA stimulation, it is the
successive phosphorylation, not formation, of the c-Src/EGFR complex that results
in the subsequent cascade activation. Second, we found that TLR4 regulates the
activation EGFR pathway mainly through the phosphorylation of the c-Src/EGFR
complex. These results demonstrate the detrimental role of EGFR in the
pathogenesis of obesity-related nephropathy, provide a new understanding of the
mechanism behind hyperlipidemia/FFA-induced EGFR activation, and support the use
of EGFR inhibitors in the treatment of obesity-induced kidney diseases.