Document Detail

Extracellular Matrix Remodeling in Takayasu's Arteritis: Role of Matrix Metalloproteinases and Adventitial Inflammation.
MedLine Citation:
PMID:  22868188     Owner:  NLM     Status:  Publisher    
Takayasu's arteritis (TA) is an inflammatory fibrosing arteritis affecting predominately the aorta and its main branches. Pathogenesis of this disease remains enigmatic. Despite the numerous studies, the role of adventitia in vascular lesion formation in the setting of TA has been ignored. Virtually nothing is known about the mechanism regulating inflammation in the adventitia in the setting of TA. The present study included subjects with Takayasu's arteritis and normal healthy control subjects. T-cells were isolated from the peripheral blood mononuclear cells (PBMCs) using nylon wool and HUT-78 (human cutaneous T lymphoma cell line) and stimulated with PHA for 24 h. Stimulated cell were fixed with paraformaldehyde and fractionated into membrane, cytosolic and nuclear fractions. These cellular fractions were co-cultured with human fibrosarcoma cell line (HT-1080) and transcriptional expression of matrix metalloproteinases (MMP-1, 3, 9 and TIMP-1) was determined using semiquantitative RT-PCR. Stimulation of MMPs-TIMP synthesis by HT-1080 cells was mimicked by a membranous fraction derived from activated T-cell isolated from TA subjects and activated HUT-78 cells, whereas cytosolic and nuclear fractions were ineffective. In conclusion, for the first time we provide evidence for the presence of a cell surface-specific antigenic moiety on T-cells of TA subjects, which is responsible for activation of fibroblasts (cells predominantly present in adventitia) to enhance MMP production and, therefore, may lead to extracellular matrix degradation.
Nitin Mahajan; Veena Dhawan; Safrun Mahmood; Sonal Malik; Sanjay Jain
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-3
Journal Detail:
Title:  Archives of medical research     Volume:  -     ISSN:  1873-5487     ISO Abbreviation:  Arch. Med. Res.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9312706     Medline TA:  Arch Med Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 IMSS. Published by Elsevier Inc. All rights reserved.
Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education & Research (PGIMER), Chandigarh, India; Department of Molecular Pharmacology and Biological Chemistry, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
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