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Effects and mechanisms of icariin on atherosclerosis
#MMPMID26064253
Hu Y
; Liu K
; Yan M
; Zhang Y
; Wang Y
; Ren L
Int J Clin Exp Med
2015[]; 8
(3
): 3585-9
PMID26064253
show ga
PURPOSE: Icariin, a flavonoid isolated from the traditional Chinese herbal
medicine Epimedium brevicornum Maxim, has been shown to process
anti-inflammatory, antioxidative actions and anti-atherosclerosis activity in
vivo and in vitro. The purpose of this study was to investigate the effects and
mechanisms of icariin on atherosclerosis by human umbilical vein endothelial
cells (HUVECs). METHODS: The effects of icariin on the activity of HUVECs induced
by oxidized low-density lipoprotein (ox-LDL) were detected by MTT assay. Then we
studied the effects of icariin on the adhesion of monocyte with HUVECs induced by
ox-LDL. The secretion of E-selectin, intercellular adhesion molecule (ICAM-1) and
vascular cell adhesion molecule (VCAM-1) by HUVECs were measured by enzyme-linked
immunosorbent assay (ELISA) method. Finally the mRNA levels of ICAM-1, VCAM-1,
E-selectin of HUVECs were analyzed by real time RT-PCR. RESULTS: MTT result
indicated that icariin (10, 20, 40 ?mol/L) could inhibit HUVECs injury induced by
ox-LDL in a concentration-dependent manner (P < 0.05). The adhesion of monocyte
with HUVECs induced by ox-LDL was inhibited by icariin in a
concentration-dependent manner (P < 0.05). The levels of ICAM-1, VCAM-1,
E-selectin of icariin groups were significantly decreased in a
concentration-dependent manner compared with ox-LDL-simulated group (P < 0.05).
The mRNA expressions of ICAM-1, VCAM-1, E-selectin of icariin groups were also
downregulated significantly compared with ox-LDL-simulated group (P < 0.05).
CONCLUSIONS: Icariin can prevent atherosclerotic lesion. Its mechanism may be
that it can defend against the oxidation damage to HUVECs, inhibit the adhesion
of monocyte to HUVECs, and reduce the secretion and expression of adhesion
molecules including ICAM-1, VCAM-1, E-selectin.