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2015 ; 10
(3
): e0120259
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Isorhamnetin attenuates atherosclerosis by inhibiting macrophage apoptosis via
PI3K/AKT activation and HO-1 induction
#MMPMID25799286
Luo Y
; Sun G
; Dong X
; Wang M
; Qin M
; Yu Y
; Sun X
PLoS One
2015[]; 10
(3
): e0120259
PMID25799286
show ga
BACKGROUND AND PURPOSE: Isorhamnetin (Iso) is a flavonoid compound extracted from
the Chinese herb Hippophae rhamnoides L. Previous studies have revealed its
anti-cancer, anti-inflammatory, and anti-oxidant activities. This study
investigated the ability of Iso to inhibit oxidized low-density lipoprotein
(ox-LDL)-induced cell apoptosis in THP-1-derived macrophages. The effects of Iso
on atherosclerosis in vivo were also evaluated in apolipoprotein E knockout
(ApoE-/-) mice fed a high fat diet. METHODS AND RESULTS: Iso showed significant
inhibitory effects on ox-LDL-induced THP-1-derived macrophage injuries via
decreasing reactive oxygen species levels, lipid deposition, and caspase-3
activation, restoring mitochondrial membrane potential, reducing the number of
terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling
(TUNEL)-positive cells, and regulating apoptosis-related proteins. We also
determined the protective effects of Iso by PI3K/AKT activation and HO-1
induction. Iso reduced the atherosclerotic plaque size in vivo in ApoE-/- mice as
assessed by oil red O, Sudan IV staining, and CD68-positive cells, and reduced
macrophage apoptosis as assessed by caspase-3 and TUNEL assays in lesions.
CONCLUSION: In conclusion, our results show that Iso inhibited atherosclerotic
plaque development in ApoE-/- mice by PI3K/AKT activation and HO-1 induction.