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2015 ; 116-117
(ä): 64-75
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CYP epoxygenase 2J2 prevents cardiac fibrosis by suppression of transmission of
pro-inflammation from cardiomyocytes to macrophages
#MMPMID25686540
Yang L
; Ni L
; Duan Q
; Wang X
; Chen C
; Chen S
; Chaugai S
; Zeldin DC
; Tang JR
; Wang DW
Prostaglandins Other Lipid Mediat
2015[Jan]; 116-117
(ä): 64-75
PMID25686540
show ga
Cytochrome P450 epoxygenase (CYP450)-derived epoxyeicosatrienoic acids (EETs) are
important regulators of cardiac remodeling; but the underlying mechanism remains
unclear. The present study aimed to elucidate how EETs regulated cardiac fibrosis
in response to isoprenaline (Iso) or angiotensin (Ang) II. Cardiac-specific human
CYP2J2 transgenic mice (Tr) and wild-type (WT) C57BL/6 littermates were infused
with Iso- or Ang II. Two weeks after infusion, Tr mice showed more alleviative
cardiac fibrosis and inflammation compared with WT mice. In vitro, we found Iso
or Ang II induced nuclear transfer of NF-?B p65 and inflammatory cytokines
expression in cardiomyocytes. Furthermore, inflammation response emerged in
macrophages cultured in cardiomyocytes-conditioned medium. When pretreatment with
14,15-EET in cardiomyocytes, the inflammatory response was markedly suppressed
and the transmission of inflammation from cardiomyocytes to macrophages was
reduced. In conclusion, CYP2J2 and EETs prevent cardiac fibrosis and cardiac
dysfunction by suppressing transmission of pro-inflammation from cardiomyocytes
to macrophages in heart, suggesting that elevation of EETs level could be a
potential strategy to prevent cardiac fibrosis.