The role of endothelial and macrophage mineralocorticoid receptor in inflammation response and anti-contractile function of perivascular adipose tissue in obese male and female

• Grant number: 18/00543-8
• Support Opportunities: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): May 01, 2018
• Effective date (End): September 30, 2022
• Field of knowledge: Biological Sciences - Physiology - Physiology of Organs and Systems
• Principal Investigator: Ana Paula Couto Davel
• Grantee: Jamaira Aparecida Victorio
• Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 13/07607-8 - OCRC - Obesity and Comorbidities Research Center, AP.CEPID

Abstract

Obesity prevalence is increasing worldwide and is higher in women than men. High body mass index is a risk factor for cardiovascular diseases (CVD), and an impaired perivascular adipose tissue (PVAT) anticontractile function associated with PVAT inflammation have been demonstrated in obesity. Mineralocorticoid receptor (MR) is expressed in immune and endothelial cells (EC) and its activation could play a key role in the adipose tissue inflammation in obesity by inducing leucocytes adhesion and migration and modulate the inflammatory macrophage M1 and/or anti-inflammatory and residents M2 profile. MR blockade improves endothelial function and has anti-inflammatory effect in female obesity, but not in males. Therefore, MR raises as a potential mechanism involved in sex differences in the physiopathology of CVD in obesity. It still not known if MR participates in PVAT dysfunction in male and female obesity. We hypothesized that MR activation is involved in the inflammatory response in PVAT and contribute to obesity-induced vascular dysfunction. Male and female mice will be fed a chow or a high-fat diet and treated with the MR antagonist spironolactone. In addition, mice lacking MR in EC (EC-MR-/-) or in myeloid cells (MO-MR-/-) fed chow or a high-fat diet will be used to evaluate cell-specific role of MR activation in obesity. Mesenteric resistance arteries (<300¼m) and respective PVAT will be harvested. PVAT leucocyte infiltration, anti- and pro-inflammatory cytokines, macrophage polarization profile and oxidative stress will be evaluated. Mesenteric arteries will be used to evaluate vascular reactivity in the presence and absence PVAT.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VICTORIO, JAMAIRA A.; GUIZONI, DANIELE M.; FREITAS, ISRAELLE N.; ARAUJO, THIAGO R.; DAVEL, ANA P.. Effects of High-Fat and High-Fat/High-Sucrose Diet-Induced Obesity on PVAT Modulation of Vascular Function in Male and Female Mice. FRONTIERS IN PHARMACOLOGY, v. 12, SEP 10 2021. (18/16505-8, 13/07607-8, 18/00543-8)

VICTORIO, JAMAIRA A.; DAVEL, ANA P.. Perivascular Adipose Tissue Oxidative Stress on the Pathophysiology of Cardiometabolic Diseases. CURRENT HYPERTENSION REVIEWS, v. 16, n. 3, p. 192-200, 2021. (18/00543-8, 18/16505-8)