Mechanism of Danzhi Jiangtang capsule protecting mitochondrial function and reducing vascular calcification via LncRNA TUG1/β-catenin signaling pathway
- VernacularTitle:丹蛭降糖胶囊通过LncRNA TUG1/β-catenin信号通路保护线粒体功能减轻血管钙化的机制
- Author:
Ying-Qun NI
1
;
Yi-Xuan LIN
;
Si-Hai WANG
;
Qin LU
;
Jin-Zhi LUO
;
Chun-Qin WU
;
ZHAO-Hui FANG
Author Information
- Keywords: LncRNA TUG1; β-catenin; mitochondri-a; diabetes mellitus; osteoblast transformation; vascu-lar calcification
- From: Chinese Pharmacological Bulletin 2024;40(5):899-906
- CountryChina
- Language:Chinese
- Abstract: Aim To explore how Danzhi Jiangtang cap-sules(DJC)safeguard the mitochondrial activity of vascular smooth muscle cells(VSMCs)by controlling the LncRNA TUG1/β-catenin signaling pathway to de-crease vascular calcification(VC).Methods Vascu-lar smooth muscle cell calcification models were in-duced with β-glycerin and diabetic vascular calcifica-tion rat models were induced with vitamin D3+high-fat diet.Von Kossa staining was applied to detect cal-cification of cells and vascular tissue.Colorimetric method of phthalein complex was used to determine calcium content.P-nitrobenzene phosphate colorimetry was employed to assess alkaline phosphatase(ALP)activity.RT-qPCR was used to analyze the expression of VSMCs'osteoblast transformation related genes bone morphogenetic protein2(BMP2),smooth muscle actin alpha(α-SMA),taurine up-regulated1,LncRNA Tug1(Lnc-RNA TUG1),and β-catenin.Western blotting was utilized to detect the protein expression of BMP2,α-SMA and β-catenin.The mitochondrial membrane potential was detected by JC-1 fluorescence probe.Mitochondrial structure was observed by trans-mission electron microscope.Results DJC reduced LncRNA TUG1 expression,down-regulated β-catenin expression,decreased ALP activity and calcium depo-sition,protected mitochondrial function,restored mem-brane potential,and decreased osteoblastic transforma-tion of VSMCs induced by glycerin phosphate.Impor-tantly,DJC attenuated diabetic lower limb VC by down-regulating the expression of LncRNA TUG1,β-catenin,and elevating the expression of α-SMA.Con-clusions DJC capsules significantly improved VSMCs by protecting mitochondrial function by LncRNA TUG1/β-catenin signaling to reduce VSMCs'osteo-blast transformation.
