Vasorelaxant activity and mechanism of essential oil from Curcuma longa L.
The essential oil from Curcuma longa L.(CLEO)was extracted by steam distillation.In this study,vasorelaxant activity and mechanism of CLEO was explored.Firstly,the experimental results of isolated rat thoracic aorta ring showed that the CLEO had vasorelaxant activity.By removing the endothelium of aorta ring and pre-incubating inhibitor of endothelial nitric oxide synthase(eNOS),it was found that the vasorelaxant activity of CLEO was endothelium-dependent and related to eNOS.By human umbilical vein endothelial cells(HUVECs)model,it was found that the CLEO could promote the production of nitric oxide(NO)in HUVECs,further indicating that the vasorelaxant activity of CLEO was related to eNOS.The results of Western blot showed that CLEO could up-regulate the phosphorylation levels of phosphatidylinositol 3-kinase(PI3K),protein kinase B(Akt)and eNOS.In summary,the CLEO has vasorelaxant activity,and its mechanism is related to activating the endothelial PI3K/Akt/eNOS pathway.All animal experiments in this paper were approved by the Committee of Laboratory Animal Welfare Ethics of Chengdu University of Traditional Chinese Medicine(approval No.2020-04).
Curcuma longa L.essential oilvasodilationendothelium-dependentPI3K/Akt/eNOS
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