title: Gene expression profile after cardiopulmonary bypass and cardioplegic arrest.
abstract: OBJECTIVE
  This study examines the cardiac and peripheral gene expression responses to cardiopulmonary bypass and cardioplegic arrest.
  
  
  METHODS
  Atrial myocardium and skeletal muscle were harvested from 16 patients who underwent coronary artery bypass grafting before and after cardiopulmonary bypass and cardioplegic arrest. Ten sample pairs were selected for patient similarity, and oligonucleotide microarray analyses of 12,625 genes were performed using matched precardiopulmonary bypass tissues as controls. Array results were validated with Northern blotting, real-time polymerase chain reaction, in situ hybridization, and immunoblotting. Statistical analyses were nonparametric.
  
  
  RESULTS
  Median durations of cardiopulmonary bypass and cardioplegic arrest were 74 and 60 minutes, respectively. Compared with precardiopulmonary bypass, postcardiopulmonary bypass myocardial tissues revealed 480 up-regulated and 626 down-regulated genes with a threshold P value of.025 or less (signal-to-noise ratio: 3.46); skeletal muscle tissues showed 560 and 348 such genes, respectively (signal-to-noise ratio: 3.04). Up-regulated genes in cardiac tissues included inflammatory and transcription activators FOS; jun B proto-oncogene; nuclear receptor subfamily 4, group A, member 3; MYC; transcription factor-8; endothelial leukocyte adhesion molecule-1; and cysteine-rich 61; apoptotic genes nuclear receptor subfamily 4, group A, member 1 and cyclin-dependent kinase inhibitor 1A; and stress genes dual-specificity phosphatase-1, dual-specificity phosphatase-5, and B-cell translocation gene 2. Up-regulated skeletal muscle genes included interleukin 6; interleukin 8; tumor necrosis factor receptor superfamily, member 11B; nuclear receptor subfamily 4, group A, member 3; transcription factor-8; interleukin 13; jun B proto-oncogene; interleukin 1B; glycoprotein Ib, platelet, alpha polypeptide; and Ras-associated protein RAB27A. Down-regulated genes included haptoglobin and numerous immunoglobulins in the heart, and factor H-related gene 2, protein phosphatase 1, regulatory subunit 3A, and growth differentiation factor-8 in skeletal muscle.
  
  
  CONCLUSIONS
  By establishing a profile of the gene-expression responses to cardiopulmonary bypass and cardioplegia, this study allows a better understanding of their effects and provides a framework for the evaluation of new cardiac surgical modalities directly at the genome level.
authors.affiliation: Division of Cardiothoracic Surgery, Beth Israel Deaconess Medical Center, and Harvard Medical School, Boston, MA 02215, USA.
authors.forename: Marc
authors.initials: M
authors.lastname: Ruel
authors.forename: Cesario
authors.initials: C
authors.lastname: Bianchi
authors.forename: Tanveer A
authors.initials: TA
authors.lastname: Khan
authors.forename: Shu
authors.initials: S
authors.lastname: Xu
authors.forename: John R
authors.initials: JR
authors.lastname: Liddicoat
authors.forename: Pierre
authors.initials: P
authors.lastname: Voisine
authors.forename: Eugenio
authors.initials: E
authors.lastname: Araujo
authors.forename: Helen
authors.initials: H
authors.lastname: Lyon
authors.forename: Isaac S
authors.initials: IS
authors.lastname: Kohane
authors.forename: Towia A
authors.initials: TA
authors.lastname: Libermann
authors.forename: Frank W
authors.initials: FW
authors.lastname: Sellke
mesh_terms: D000368:Aged; D001483:Base Sequence; D015152:Blotting, Northern; D002315:Cardiopulmonary Bypass; D016022:Case-Control Studies; D046508:Culture Techniques; D005260:Female; D005786:Gene Expression Regulation; D016762:Genes, fos / Q000502:physiology; D016758:Genes, jun / Q000502:physiology; D006324:Heart Arrest, Induced; D006801:Humans; D017403:In Situ Hybridization; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics; D007375:Interleukin-1 / Q000235:genetics; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D018482:Muscle, Skeletal / Q000378:metabolism* / Q000473:pathology; D009206:Myocardium / Q000378:metabolism* / Q000473:pathology; D011184:Postoperative Period; D000090063:Proto-Oncogene Mas; D011519:Proto-Oncogenes / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012494:Sampling Studies; D012680:Sensitivity and Specificity; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics; D015854:Up-Regulation
chemical_list: D007375:Interleukin-1; C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D018799:Intercellular Adhesion Molecule-1