Back to Search
Start Over
Simultaneous analysis of 1176 gene products in normal human aorta and abdominal aortic aneurysms using a membrane-based complementary DNA expression array.
- Source :
-
Journal of vascular surgery [J Vasc Surg] 2001 Jul; Vol. 34 (1), pp. 143-50. - Publication Year :
- 2001
-
Abstract
- Background: A number of changes in gene expression have been described in abdominal aortic aneurysms (AAAs), but the spectrum of molecular alterations in this disease is unknown. The purpose of this study was to characterize the expression of approximately 1000 gene products in human AAA tissue and to compare the profile of genes expressed in AAAs with that observed in normal aorta.<br />Materials and Methods: Total RNA was isolated from abdominal aortic wall tissues (4 AAAs and 4 normal aortas), and array-specific [(32)P]-labeled complementary DNA (cDNA) probes were created with reverse transcription. The cDNA probes were hybridized with nylon membranes containing an array of 1176 cDNA clones (AtlasArray Human 1.2 I; Clontech, Palo Alto, Calif), and autoradiographs were scanned to identify the patterns of gene expression characteristic of each tissue type. Densitometric analysis was used to standardize the expression of individual genes to a panel of housekeeping controls, and differential gene expression was defined by a signal ratio of at least 2:1.<br />Results: One hundred forty-five (12.3%) of the 1176 genes were consistently expressed in aortic tissue. Thymosin beta-4 was the most abundant of 101 transcripts detected in both AAAs and normal aorta, whereas 44 genes exhibited differential patterns of expression (39 predominant in AAAs and 5 in normal aorta). Densitometric analysis confirmed differences in expression for 20 of these gene products between AAAs and normal aorta, with the greatest increases seen for myeloid cell nuclear differentiation antigen (31-fold), cathepsin H (30-fold), platelet-derived growth factor-A (23-fold), apolipoprotein E (13-fold), gelatinase B/matrix metalloproteinase-9 (12-fold), and interleukin-8 (11-fold). The only gene products substantially decreased in AAAs were myosin light chain kinase (39-fold) and beta-1 integrin (twofold). AAA tissues thereby exhibited a distinct pattern of gene expression reflecting chronic inflammation, extracellular matrix degradation, atherosclerosis, and smooth muscle cell depletion.<br />Conclusions: cDNA expression arrays provide a powerful new approach to help identify the molecular mechanisms responsible for aneurysmal degeneration. Further studies will be needed to elucidate the functional and pathophysiologic significance of the individual genes that exhibit altered levels of expression in AAA tissue.
- Subjects :
- Aged
Aged, 80 and over
Aortic Aneurysm, Abdominal pathology
Arteriosclerosis genetics
Computational Biology
DNA Probes
DNA, Complementary genetics
Extracellular Matrix genetics
Female
Gene Expression
Humans
Inflammation genetics
Male
Matrix Metalloproteinase 9 metabolism
Middle Aged
Muscle, Smooth, Vascular pathology
Aortic Aneurysm, Abdominal genetics
Gene Expression Profiling
Oligonucleotide Array Sequence Analysis
Subjects
Details
- Language :
- English
- ISSN :
- 0741-5214
- Volume :
- 34
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of vascular surgery
- Publication Type :
- Academic Journal
- Accession number :
- 11436088
- Full Text :
- https://doi.org/10.1067/mva.2001.113310