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Icariin regulates PRMT/ADMA/DDAH pathway to improve endothelial function

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Abstract

Background

Oxidative stress may affect PRMT/ADMA/DDAH (protein arginine methyltransferases/asymmetric dimethylarginine/dimethylarginine dimethylaminohydrolase) pathway to impair endothelial dysfunction. The present study was carried out to test the effect of icariin on endothelial function and the mechanisms responsible for this.

Methods

Eighty mice at 12 weeks of age were separated randomly into four groups (n = 20): C57BL/6J control, untreated apolipoprotein E-deficient (ApoE−/−), two groups of icariin-treated (10 or 30 mg/kg body wt/day, intragastrically) ApoE−/−. Primary human umbilical vein endothelial cells (HUVECs) were randomly divided into 7 groups: control group, vehicle of icariin (10 μmol/L) group, icariin (10 μmol/L) group, lysophosphatidylcholine (LPC) (10 μg/mL) group, LPC plus icariin (1 μmol/L) group, LPC plus icariin (3 μmol/L) group, and LPC plus icariin (10 μmol/L) group.

Results

In ApoE−/− mice and primary HUVECs, icariin treatment decreased reactive oxygen species production, PRMT I expression, ADMA level, half-maximum effective concentration of ApoE−/− mice aortic rings. Icariin increased DDAH II expression, DDAH activity, maximal relaxation value and endothelium-dependent vasorelaxation in aortic rings from ApoE−/− mice (p < 0.05 or p < 0.01).

Conclusions

The present results suggest that icariin regulates PRMT/ADMA/DDAH pathway to improve endothelial function.

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Correspondence to Hong-Bo Xiao.

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Xiao, HB., Liu, ZK., Lu, XY. et al. Icariin regulates PRMT/ADMA/DDAH pathway to improve endothelial function. Pharmacol. Rep 67, 1147–1154 (2015). https://doi.org/10.1016/j.pharep.2015.04.017

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  • DOI: https://doi.org/10.1016/j.pharep.2015.04.017

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