Semicarbazide-Sensitive Amine Oxidase in Vascular Smooth Muscle Cells - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Arteriosclerosis, Thrombosis, and Vascular Biology Année : 2002

Semicarbazide-Sensitive Amine Oxidase in Vascular Smooth Muscle Cells

Résumé

Cultured vascular smooth muscle cells (VSMCs) derived from rat aortic media were used to examine semicarbazide-sensitive amine oxidase (SSAO) expression during their differentiation process. In a defined serum-free medium permissive for in vitro VSMC differentiation, there was a large increase in SSAO mRNA and protein levels and in the related enzyme activity during the course of cell culture. This pattern of expression was concomitant with that of some smooth muscle–specific mRNA markers of differentiation. mRNAs in differentiated cultured VSMCs were comparable to those detected in total aorta and media. Pharmacological properties of SSAO present in VSMCs were similar to enzyme activities previously described in the aortic wall. In this model, we also demonstrated that methylamine, a physiological substrate of SSAO, activated 2-deoxyglucose transport in a time- and dose-dependent manner. This methylamine effect was reproduced by other SSAO substrates and was prevented by the SSAO inhibitor semicarbazide. It was antagonized in the presence of catalase, suggesting that SSAO-activated glucose transport was mediated through H 2 O 2 production. In addition, methylamine promoted glucose transporter 1 accumulation at the cell surface. Thus, we demonstrate for the first time the differentiation-dependent expression of SSAO in VSMCs and its role in the regulation of VSMC glucose uptake.

Dates et versions

hal-04000834 , version 1 (22-02-2023)

Identifiants

Citer

Khadija El Hadri, Marthe Moldes, Nathalie Mercier, Marise Andreani, Jacques Pairault, et al.. Semicarbazide-Sensitive Amine Oxidase in Vascular Smooth Muscle Cells. Arteriosclerosis, Thrombosis, and Vascular Biology, 2002, 22 (1), pp.89-94. ⟨10.1161/hq0102.101550⟩. ⟨hal-04000834⟩
4 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More