Document Detail

Transmural inflammation by interferon-gamma-producing T cells correlates with outward vascular remodeling and intimal expansion of ascending thoracic aortic aneurysms.
MedLine Citation:
PMID:  16014397     Owner:  NLM     Status:  MEDLINE    
Arterial pathology manifests as aneurysmal or obstructive disease depending on changes in lumen size due to vascular remodeling (change in vessel external diameter) and/or intimal expansion. Recent clinical and experimental observations in abdominal aortic aneurysms have led to the emerging dogma that Th2-dominant immune responses result in expansive vascular remodeling and luminal ectasia, whereas Th1 immune responses cause intimal hyperplasia and luminal stenosis. We tested this hypothesis by descriptive analyses of 31 non-aneurysmal and 29 aneurysmal ascending thoracic aortic specimens. Approximately half the aneurysms were distinguished by transmural inflammation. The remaining aneurysms and all the non-aneurysmal aortas had a similar leukocytic infiltrate that spared the inner media. Aneurysm tissue had increased expression of the prototypical Th1 cytokine, interferon (IFN)-gamma, and undetectable Th2 cytokines. Specimens with inner media infiltration displayed robust production of IFN-gamma, induction of the IFN-gamma-inducible chemokines IP-10 and Mig, and recruitment of lymphocytes bearing their cognate receptor CXCR3. Transmural inflammation and IFN-gamma production were associated with increased aortic external diameter, intimal thickening, preserved vascular smooth muscle cell density, and decreased matrix proteins. Th1, but not Th2, immune responses have a positive correlation with both outward vascular remodeling and intimal expansion of ascending thoracic aortic aneurysms.
Paul C Y Tang; Alexander O Yakimov; Michael A Teesdale; Michael A Coady; Alan Dardik; John A Elefteriades; George Tellides
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.     Date:  2005-07-12
Journal Detail:
Title:  FASEB journal : official publication of the Federation of American Societies for Experimental Biology     Volume:  19     ISSN:  1530-6860     ISO Abbreviation:  FASEB J.     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-08-29     Completed Date:  2006-03-06     Revised Date:  2012-02-15    
Medline Journal Info:
Nlm Unique ID:  8804484     Medline TA:  FASEB J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1528-30     Citation Subset:  IM    
Interdepartmental Program in Vascular Biology and Transplantation, Yale University School of Medicine, New Haven, Connecticut, USA.
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MeSH Terms
Antigens, CD56 / analysis
Aortic Aneurysm, Thoracic / immunology,  pathology*
Base Sequence
Extracellular Matrix Proteins / metabolism
Inflammation / pathology*
Interferon-gamma / biosynthesis*
Leukocytes / pathology
Molecular Sequence Data
T-Lymphocytes / immunology*
Th1 Cells / immunology
Tunica Intima / pathology*
Grant Support
Reg. No./Substance:
0/Antigens, CD56; 0/Extracellular Matrix Proteins; 82115-62-6/Interferon-gamma

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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