Adipocyte aminopeptidases in obesity and fasting

Author(s)

Alponti, Rafaela Fadoni ^{[1, 2]} ; Silveira, Paulo Flavio ^[1]

Affiliation

^[1] Inst Butantan, Pharmacol Lab, BR-05503900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Dept Physiol, BR-05508900 Sao Paulo - Brazil

• Document type: Journal article
• Source: Molecular and Cellular Endocrinology; v. 415, n. C, p. 24-31, NOV 5 2015.
• Web of Science Citations: 1

Abstract

This study checked the existence of a diverse array of aminopeptidase (AP) enzymes in high (HDM) and low (LDM) density microsomal and plasma membrane (MF) fractions from adipocytes of control, monosodium glutamate obese and food deprived rats. Gene expression was detected for ArgAP, AspAP, MetAP, and two AlaAP (APM and PSA). APM and PSA had the highest catalytic efficiency, whereas AspAP the highest affinity. Subcellular distribution of AP activities depended on metabolic status. Comparing catalytic levels, AspAP in HDM, LDM and MF was absent in obese and control under food deprivation; PSA in LDM was 3.5-times higher in obese than in normally fed control and control and obese under food deprivation; MetAP in MF was 4.5-times higher in obese than in food deprived obese. Data show new AP enzymes genetically expressed in subcellular compartments of adipocytes, three of them with altered catalytic levels that respond to whole-body energetic demands. (C) 2015 Elsevier Ireland Ltd. All rights reserved. (AU)

• FAPESP's process: 10/01385-5 - Aminopeptidases, prolil oligopeptidase and representative peptides in adipocytes from obese and food deprived rats
• Grantee: Paulo Flávio Silveira
• Support Opportunities: Regular Research Grants