Global gene expression profiling of end-stage dilated cardiomyopathy using a human cardiovascular-based cDNA microarray

J. David Barrans, Paul D. Allen, Dimitrios Stamatiou, Victor J. Dzau, Choong Chin Liew

Research output: Contribution to journalArticle

151 Scopus citations

Abstract

To obtain a genomic portrait of heart failure derived from end-stage dilated cardiomyopathy (DCM), we explored expression analysis using the CardioChip, a nonredundant 10,848-element human cardiovascular-based expressed sequence tag glass slide cDNA microarray constructed in-house. RNA was extracted from the left ventricular free wall of seven patients undergoing transplantation, and five nonfailing heart samples. Cy3- and Cy5-labeled (and reverse dye-labeled) cDNA probes were synthesized from individual diseased or nonfailing adult heart RNA, and hybridized to the array. More than 100 transcripts were consistently differentially expressed in DCM > 1.5-fold (versus pooled nonfailing heart, P < 0.05). Atrial natriuretic peptide was found to be up-regulated in DCM (19-fold compared to nonfailing, P < 0.05), as well as numerous sarcomeric and cytoskeletal proteins (eg, cardiac troponin, tropomyosin), stress response proteins (eg, HSP 40, HSP 70), and transcription/translation regulators (eg, CCAAT box binding factor, eIF-1AY). Down-regulation was most prominently observed with cell-signaling channels and mediators, particularly those involved in Ca2+ pathways (Ca2+/calmodulin-dependent kinase, inositol 1,4,5-trisphosphate receptor, SERCA). Most intriguing was the co-expression of several novel, cardiac-enriched expressed sequence tags. Quantitative real-time reverse transcriptase-polymerase chain reaction of a selection of these clones verified expression. Our study provides a preliminary molecular profile of DCM using the largest human heart-specific cDNA microarray to date.

Original languageEnglish (US)
Pages (from-to)2035-2043
Number of pages9
JournalAmerican Journal of Pathology
Volume160
Issue number6
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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    Barrans, J. D., Allen, P. D., Stamatiou, D., Dzau, V. J., & Liew, C. C. (2002). Global gene expression profiling of end-stage dilated cardiomyopathy using a human cardiovascular-based cDNA microarray. American Journal of Pathology, 160(6), 2035-2043.