title: Analysis of gene expression profiles of normal human nasal mucosa and nasal polyp tissues by SAGE.
abstract: BACKGROUND
  A systemic determination of gene expression profiles in nasal polyp compared with normal nasal mucosa would contribute considerably to the investigation of the disease marker in various rhinopathy and general knowledge on the formation of human nasal polyp.
  
  
  OBJECTIVE
  The aim of this study was to identify the transcriptome of the normal human nasal mucosa and nasal polyp by the serial analysis of gene expression.
  
  
  METHODS
  mRNA was extracted from normal inferior turbinate mucosa and nasal polyp. Short sequences (tags), each one usually corresponding to a distinct transcript, was isolated and concatemerized into long DNA molecules, which were cloned and sequenced.
  
  
  RESULTS
  We detected 65,305 tags for normal nasal mucosa and 55,829 tags for nasal polyp, representing 20,629 and 17,636 potential transcripts species, respectively. Of the unique tags encountered more than once, 92% (normal nasal mucosa) and 90% (nasal polyp) matched known genes or expressed sequence tags, whereas the remainder did not match any GenBank sequences. Therefore, 504 and 539 novel transcripts were identified in normal nasal mucosa and nasal polyp, respectively. Although the expression levels of most transcripts in both libraries were similar, 114 transcripts were differentially expressed at a statistically significant level (P < .05)-that is, 65 and 49 transcripts among them were expressed at a higher level in normal nasal mucosa and nasal polyp, respectively.
  
  
  CONCLUSIONS
  This information should be very useful for basic knowledge as well as for future studies on pathophysiological conditions of human nasal mucosa, providing some clues to evaluate the altered factors in a variety of rhinopathies.
  
  
  CONCLUSIONS
  The results of this study might contribute to general knowledge on the formation of human nasal polyp.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Soonchunhyang University, Bucheon Hospital, Geonggyi-do, Korea.
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Lee
authors.forename: Sang Hag
authors.initials: SH
authors.lastname: Lee
authors.forename: Heung Man
authors.initials: HM
authors.lastname: Lee
authors.forename: Seung Hoon
authors.initials: SH
authors.lastname: Lee
authors.forename: Hak Hyun
authors.initials: HH
authors.lastname: Jung
authors.forename: Se Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Sun Mook
authors.initials: SM
authors.lastname: Kang
mesh_terms: D000328:Adult; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D017403:In Situ Hybridization; D008297:Male; D008875:Middle Aged; D009297:Nasal Mucosa / Q000378:metabolism*; D009298:Nasal Polyps / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction