MicroRNAs as metabolic mediators in the communication among white adipose tissue, liver and skeletal muscle in obese mice

• Grant number: 18/05426-0
• Support type: Scholarships in Brazil - Doctorate (Direct)
• Effective date (Start): August 01, 2018
• Status: Discontinued
• Field of knowledge: Biological Sciences - Physiology - Physiology of Organs and Systems
• Principal Investigator: Alice Cristina Rodrigues
• Grantee: Karina Cunha e Rocha
• Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 19/14999-6 - The role of adipose tissue macrophages-derived exosomes on steatohepatitis progression in diet-induced obese mice, BE.EP.DD

Abstract

Obesity is associated with a chronic low-grade inflammation and, for this reason, is considerated one of the major risk factors for developing insulin resistance. Recently, microRNAs in adipose tissue was proposed to be secreted into plasma through microvesicles and then transferred to other cell types, playing an important role in intercellular communication. Thus, we believe that Obesity and insulin resistance may cause alterations in the tissue expression pattern and release of circulating microRNAs from the main tissues involved with energy metabolism (liver, muscle and white adipose tissue). The overall objective of this project is to investigate important microRNAs for the mechanisms of communication between liver, skeletal muscle and white adipose tissue in Obesity and its major metabolic implications. For this, in vivo and in vitro models will be used. Male C57BL/6 mice will receive control or high fat diet supplemented with condensed milk for twelve weeks. After this period, the insulin sensitivity, glucose tolerance, and plasma biochemical parameters will be evaluated and the quantitative expression of microRNAs and its target genes of white adipose tissue, gastrocnemius muscle, liver and plasma will be perform. Serum isolated exosomes of obese mice will be injected in control mice followed by subsequent analysis of metabolic and molecular parameters. The primary culture of adipocytes, myoblasts and hepatocytes will be performed with the purpose of confirming the communication, through exosomal microRNA, between the different tissues. With this study, we expect a greater understanding of the mechanisms of communication between different tissues via microRNAs and their correlation with Obesity and insulin resistance. (AU)

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)

FALQUETTO, BARBARA; THIEME, KARINA; MALTA, MARILIA B.; ROCHA, KARINA C. E.; TUPPY, MARINA; POTJE, SIMONE R.; ANTONIALI, CRISTINA; RODRIGUES, ALICE C.; MUNHOZ, CAROLINA D.; MOREIRA, THIAGO S.; TAKAKURA, ANA C. Oxidative stress in the medullary respiratory neurons contributes to respiratory dysfunction in the 6-OHDA model of Parkinson's disease. JOURNAL OF PHYSIOLOGY-LONDON, SEP 2020. Web of Science Citations: 0.