title: The research on screening differentially expressed genes in Hirschsprung's disease by using Microarray.
abstract: OBJECTIVE
  To study the differential expression of genes between Hirschsprung's disease (HSCR) and normal tissue by using microarray for exploring the mechanism of HSCR development and establishing the gene expression profiles of HSCR.
  
  
  METHODS
  Colon tissues (aganglionic and normal segments) of 4 patients with HSCR were detected by the Agilent SurePrint G3 Human GE 8x60K Microarrays. RT-PCR was used to verify the results of Microarray test. Then, immunohistochemistry was used to demonstrate the expression of HAND2 in the myenteric plexus of the colon from 46 patients with HSCR to further explore the relationship between HAND2 and development of HSCR.
  
  
  RESULTS
  A total of 12,125 meaningful expressed genes were screened out. 4 pairs of specimens had 622 differentially expressed genes, 584 (93.89%) of which were up-regulated while 38(6.11%) were down-regulated. 6 of the 622 genes were tested by RT-PCR, which were consistent with the results detected by Microarray. The average optical density of positive expression of HAND2 in myenteric plexus was compared between the aganglionic, transitional, dilated, normal segments and control group. The average optical density in the aganglionic segments was obviously reduced. Statistical analyzed data showed that it has significant deviation (P<0.01).
  
  
  CONCLUSIONS
  1. A set of differentially expressed genes between aganglionic and normal segments of HSCR was obtained. Our data may provide significant information to research the pathogenesis of HSCR. 2. Reduced protein expression of HAND2 in the myenteric plexus of the aganglionic would suggest that HAND2 was involved in the pathogenesis of HSCR.
authors.affiliation: Department of Pediatric Surgery of Guangdong Women And Children Hosptial, Guangzhou Medical University, Guangzhou 511400, P.R. China. Electronic address: urey0206@gmail.com.
authors.forename: Ke-Wang
authors.initials: KW
authors.lastname: Qin
authors.forename: Hao
authors.initials: H
authors.lastname: Shi
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Liu
authors.forename: Wei-Long
authors.initials: WL
authors.lastname: Cai
authors.forename: Kun-He
authors.initials: KH
authors.lastname: Wu
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Zhu
authors.forename: Fei-Fei
authors.initials: FF
authors.lastname: Lan
mesh_terms: D051792:Basic Helix-Loop-Helix Proteins / Q000096:biosynthesis / Q000235:genetics; D003106:Colon / Q000378:metabolism; D005260:Female; D020869:Gene Expression Profiling / Q000379:methods*; D056726:Genetic Association Studies; D006627:Hirschsprung Disease / Q000235:genetics*; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D008297:Male; D009197:Myenteric Plexus / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D018028:Receptors, Neurotensin / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014404:Tubulin / Q000096:biosynthesis / Q000235:genetics
chemical_list: D051792:Basic Helix-Loop-Helix Proteins; D012333:RNA, Messenger; D018028:Receptors, Neurotensin; D014404:Tubulin; C498765:HAND2 protein, human; C576987:TUBB2B protein, human; C114036:neurotensin type 1 receptor
keywords: Differentially expressed genes; Gene expression; HAND2; Hirschsprung’s disease; Immunohistochemistry; Microarray