RESUMO
[Objective]To investigate the effects of different doses of anthocyanins Cy-3-g on serum lipids,platelet-derived chemokines,including MIF and CXCL12 together with their receptors CXCR4 and CXCR7.[Methods]Male ApoE-/-mice were distributed to 5 groups(n=15 per group),and fed with standard diet,high fat diet(HFD),HFD with 200 mg/kg Cy-3-g(low),HFD with 400 mg/kg Cy-3-g(middle),HFD with 800 mg/kg Cy-3-g(high)respectively for 16 weeks. The changes of body weight and food intake were recorded weekly. At the end of the experiment term,the serum lipids(triglyceride,cholesterol,HDL-C,LDL-C)were detected by kits. Arteries were separated to determine plaque histology by Oil-Red-O stain.MIF,CXCL12 and CCL2 in serum were detected by ELISA kits.The expression of CXCR4 and CXCR7 on the surface of leukocytes were tested via flow cytometry. Tail bleeding time was measured mean-while.[Results]Compared with the HFD group,the levels of serum lipids in medium(400 mg/kg)and high(800 mg/kg)Cy-3-g groups were significantly decreased(P<0.05). The plaque area of carotid artery was decreased in high Cy-3-g group(P<0.05).Cy-3-g at all doses significantly reduced the serum concentrations of CXCL12 and CCL2(P<0.002).Cy-3-g of medium(400 mg/kg)and high(800 mg/kg)dose significantly inhibited the expression of CXCR4 and CXCR7 on leukocyte surface(P<0.05). Cy-3-g does not prolong the tail bleeding time.[Conclusions]Anthocyanin Cy-3-g inhibits chemokine CXCL12,CCL2 in serum,and the expression of CXCR4 and CXCR7 on leukocytes without bleeding risk in ApoE-/-mice.
