Document Detail

Telomerase expression on aortic wall endothelial cells is attenuated in abdominal aortic aneurysms compared to healthy nonaneurysmal aortas.
MedLine Citation:
PMID:  21917401     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Linear chromosomes carry specific DNA structures at their ends called telomeres. The latter shorten with each successive cell division making their length a marker of cell age. Telomerase prevents such telomere attrition by adding back telomeric repeats at the telomere ends, thus playing an important role in cell aging. On the other hand, an abdominal aortic aneurysm (AAA) represents an age-related degenerative disorder. The aim of the present study was to investigate a potential correlation of telomerase expression with AAA formation.
METHODS: Aortic wall tissue samples were collected from 49 patients (mean age, 63.8 ± 4.4 years) with AAAs during open elective repair and from 24 deceased organ donors as controls (mean age, 60.5 ± 3.9 years). Telomerase expression on endothelial cells was detected by immunohistochemistry. Associations of telomerase positivity with AAAs and epidemiologic and clinical variables were investigated.
RESULTS: Telomerase expression was significantly decreased in patients with AAAs (11 of 49; 22.4%) compared to controls (19 of 24; 79.2%; P < .001). This association persisted after adjustment for age, gender, coronary artery disease (CAD), hypercholesterolemia, hypertension and smoking (odds ratio, 0.47; 95% confidence interval, 0.14-0.58; P < .01.).
CONCLUSION: Patients with AAAs have attenuated telomerase endothelial expression compared to controls, implying a protective role of telomerase against AAA formation. Further investigation of pathways involved in vascular aging may contribute to elucidation of AAA pathogenetic mechanisms.
Dimitrios Dimitroulis; Athanasios Katsargyris; Chris Klonaris; Efthymios D Avgerinos; Matrona Fragou-Plemenou; Gregory Kouraklis; Christos D Liapis
Publication Detail:
Type:  Journal Article     Date:  2011-09-13
Journal Detail:
Title:  Journal of vascular surgery     Volume:  54     ISSN:  1097-6809     ISO Abbreviation:  J. Vasc. Surg.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-05     Completed Date:  2012-04-03     Revised Date:  2012-10-03    
Medline Journal Info:
Nlm Unique ID:  8407742     Medline TA:  J Vasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1778-83     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.
Athens University Medical School, 2nd Surgical Department, Vascular Division, Laikon University General Hospital, Athens, Greece.
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MeSH Terms
Age Factors
Aortic Aneurysm, Abdominal / enzymology*,  etiology,  pathology
Case-Control Studies
Cell Aging
Endothelial Cells / enzymology*,  pathology
Middle Aged
Sex Factors
Telomerase / metabolism*
Reg. No./Substance:

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