Perivascular adipose tissue and microvascular endothelial dysfunction in obese mice: Beneficial effects of aerobic exercise in adiponectin receptor (AdipoR1) and peNOS(Ser1177)

Autor(es)

Sousa, Andressa S. ^[1] ; Sponton, Amanda C. S. ^[1] ; Delbin, Maria A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Lab Vasc Biol, Dept Struct & Funct Biol, Inst Biol, UNICAMP, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Clinical and Experimental Pharmacology and Physiology; v. 48, n. 10 JUL 2021.
• Citações Web of Science: 1

Resumo

In the present study, we aim to investigate the effects of aerobic physical training on perivascular adipose tissue (PVAT)-induced microvascular dysfunction of the femoral artery in obese mice. Microvascular reactivity was evaluated in control sedentary (c-SD), obese sedentary (o-SD) and obese trained (o-TR) male mice (C57BL6/JUnib), in the absence (PVAT-) or the presence (PVAT+) of femoral artery PVAT. We also analyzed protein expression, vascular nitric oxide (NO) production and reactive oxygen species (ROS) generation in PVAT. The blood glucose, triglycerides and total cholesterol levels were increased in the o-SD group, when compared with the c-SD group. The maximal responses and the potency to acetylcholine (ACh) were decreased in PVAT+ compared with PVAT- rings in the o-SD group, accompanied by a decrease in vascular protein expression of peNOS(Ser1177), Cu/Zn-SOD, leptin receptor (Ob-R) and adiponectin receptor (AdipoR1). The protein expression of leptin increased and that of adiponectin decreased in PVAT. Additionally, vascular NO production was reduced and ROS generation was enhanced in PVAT in the o-SD group. Aerobic exercise training was effective for normalizing ACh relaxation response, vascular NO production and ROS generation in the o-TR group. It partially re-established the vascular protein expression of peNOS(Ser1177) and the PVAT leptin; normalized the vascular Cu/Zn-SOD and AdipoR1 protein expressions. In obese sedentary mice, the presence of PVAT is involved in the process of microvascular dysfunction of the femoral artery in a pathway associated with increased inflammation and ROS generation. The aerobic exercise training normalized the vascular response, the NO production and/or bioavailability and oxidative stress, with improved vascular expressions of Cu/Zn-SOD, peNOS(ser1177), and AdipoR1. (AU)

• Processo FAPESP: 13/02960-1 - Papel do tecido adiposo perivascular em artérias aorta e femoral de camundongos treinados e tratados com dieta hiperlipídica
• Beneficiário: Maria Andréia Delbin
• Modalidade de apoio: Auxílio à Pesquisa - Regular