The total flavonoids of Rhodiola japonica promote vascular formation in rat cerebral vascular endothelial cells in vitro and their relationship with VEGFR2 and neurogenic H2S
- VernacularTitle:映山红花总黄酮促进大鼠脑血管内皮细胞体外形成血管作用及与VEGFR2和神经源性H2S的关系
- Author:
Mei-Jing ZHONG
1
;
Shuo CHEN
;
Zhi-Wu CHEN
Author Information
- Keywords: hydrogen sulfide; hippocampal neuron cells; rat brain microvascular endothelial cells; prolif-eration; migration; tube formation; total flavones of rhododendra
- From: Chinese Pharmacological Bulletin 2024;40(5):865-872
- CountryChina
- Language:Chinese
- Abstract: Aim To explore the effect of total fla-vonoids of Rhodiola japonica(TFR)on vascular forma-tion in rat cerebral vascular endothelial cells in vitro and its relationship with VEGFR2 and neurogenic hy-drogen sulfide(H2 S).Methods Using rat cerebral vascular endothelial cells cultured separately and co cultured with hippocampal neurons,different experi-mental methods were used to detect cell proliferation,migration,tube formation,H2S content,and calcium fluorescence intensity,including CCK8 method,cell scratch method,Transwell method,matrix gel tube for-mation,H2 S reagent kit,and calcium fluorescence probe method.Results In isolated cultured rat brain microvascular endothelial cells,H2S donor NaHS(200μmol·L-1)and TFR(90,270,810 mg·L-1)could significantly promote the proliferation,migration area and the number of migrating cells of primary rat brain microvascular endothelial cells,as well as the forma-tion of blood vessels and[Ca2+]i,while VEGFR2 blocker SU5416(10 μmol·L-1)could inhibit the promotion of endothelial cell proliferation,migration and vascular formation by TFR;TFR significantly in-creased H2S content in co-cultured rat brain microvas-cular endothelial cells with hippocampal neurons,and was inhibited by CBS inhibitor AOAA(200 μmol· L-1).At the same time,TFR significantly promotes the formation of vascular effects in co-cultured rat cere-bral vascular endothelial cells,and could be signifi-cantly inhibited by AOAA and VEGFR2 blocker SU5416.Conclusions TFR can promote the forma-tion of blood vessels in cerebral vascular endothelial cells by increasing[Ca2+]i of VEGFR2 in vitro,and can promote angiogenesis by inducing CBS generation of H2S in neurons and acting on VEGFR2 in rat brain microvascular endothelial cells.
