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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Neutral aminopeptidase and dipeptidyl peptidase IV in the development of collagen II-induced arthritis

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Yamasaki, Simone Cristina [1] ; Murari-do-Nascimento, Stephanie [1] ; Silveira, Paulo Flavio [1]
Total Authors: 3
[1] Inst Butantan, Pharmacol Lab, BR-05503900 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Regulatory Peptides; v. 173, n. 1-3, p. 47-54, JAN 10 2012.
Web of Science Citations: 5

This study evaluated the hypothesis that neutral (APN) and dipeptidyl-IV (DPPIV) aminopeptidase activity levels would be critical for the susceptibility to arthritis in collagen-induced model (CIA). The macroscopic signs of arthritis in CIA rats were checked and peripheral blood. synovial fluid and synovial tissue from knee joint were withdrawn. Soluble (SF) and solubilized membrane-bound (MF) fractions from the synovial tissue and peripheral blood mononuclear cells (PBMCs) were obtained. APN and DPPIV activities were fluormetrically quantified. Severe swelling in both the entire hind paws was the minimum criterion to select CIA rats with arthritis. These arthritic rats had high APN in plasma, synovial fluid and SF of the synovial tissue, together with low APN and DPPIV in MF of PBMCs and hallmark histological changes in tibio-tarsal joint. CIA rats with no macroscopic signs of arthritis were diagnosed as resistant and they had low APN in MF of the synovial tissue, low DPPIV in SF of PBMCs and high DPPIV in plasma together with histological aspects of tibio-tarsal joint similar to healthy control rats. Data suggested that APN and DPPIV activity levels are related to the development of arthritis, being protective or inducer of the susceptibility. Understanding what is controlling the compartment-specific changes of these peptidases and looking at ways in which to manipulate their activities may lead to a better knowledge of the arthritic processes and novel treatments. (C) 2011 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 07/08311-4 - Anti-type II collagen antibody and interleukin 6 in the plasma and peptidases of plasma, synovia, synovium and circulating leukocytes from rats treated with collagen type II and Apis mellifera venom
Grantee:Paulo Flávio Silveira
Support Opportunities: Regular Research Grants