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2015 ; 5
(ä): 10937
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TonEBP suppresses adipogenesis and insulin sensitivity by blocking epigenetic
transition of PPAR?2
#MMPMID26042523
Lee JH
; Lee HH
; Ye BJ
; Lee-Kwon W
; Choi SY
; Kwon HM
Sci Rep
2015[Jun]; 5
(ä): 10937
PMID26042523
show ga
TonEBP is a key transcription factor in cellular adaptation to hypertonic stress,
and also in macrophage activation. Since TonEBP is involved in inflammatory
diseases such as rheumatoid arthritis and atherosclerosis, we asked whether
TonEBP played a role in adipogenesis and insulin resistance. Here we report that
TonEBP suppresses adipogenesis and insulin signaling by inhibiting expression of
the key transcription factor PPAR?2. TonEBP binds to the PPAR?2 promoter and
blocks the epigenetic transition of the locus which is required for the
activation of the promoter. When TonEBP expression is reduced, the epigenetic
transition and PPAR?2 expression are markedly increased leading to enhanced
adipogenesis and insulin response while inflammation is reduced. Thus, TonEBP is
an independent determinant of adipose insulin sensitivity and inflammation.
TonEBP is an attractive therapeutic target for insulin resistance in lieu of
PPAR? agonists.