A comparative analysis by SAGE of gene expression profiles of esophageal adenocarcinoma and esophageal squamous cell carcinoma.
Esophageal adenocarcinoma (EA) and esophageal squamous cell carcinoma (ESCC) are the two main types of esophageal cancer. Despite extensive research the exact molecular basis of these cancers is unclear. Therefore we evaluated the transcriptome of EA in comparison to non-dysplastic Barrett's esophagus (BE), the metaplastic epithelium that predisposes for EA, and compared the transcriptome of ESCC to normal esophageal squamous epithelium. For obtaining the transcriptomes tissue biopsies were used and serial analysis of gene expression (SAGE) was applied. Validation of results by RT-PCR and immunoblotting was performed using tissues of an additional 23 EA and ESCC patients. Over 58,000 tags were sequenced. Between EA and BE 1013, and between ESCC and normal squamous epithelium 1235 tags were significantly differentially expressed (p<0.05). The most up-regulated genes in EA compared to BE were SRY-box 4 and Lipocalin2, whereas the most down-regulated genes in EA were Trefoil factors and Annexin A10. The most up-regulated genes in ESCC compared to normal squamous epithelium were BMP4, E-Cadherin and TFF3. The results could suggest that the BE expression profile is closer related to normal squamous esophagus then to EA. In addition, several uniquely expressed genes are identified.
van Baal
Jantine W P M
JW
Center for Experimental and Molecular Medicine, Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands. jvanbaal@hotmail.com
Milana
Francesco
F
Rygiel
Agnieszka M
AM
Sondermeijer
Carine M T
CM
Spek
C Arnold
CA
Bergman
Jacques J G H M
JJ
Peppelenbosch
Maikel P
MP
Krishnadath
Kausilia K
KK
D000230:Adenocarcinoma / Q000235:genetics* / Q000378:metabolism; D000368:Aged; D000369:Aged, 80 and over; D001471:Barrett Esophagus / Q000235:genetics; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000378:metabolism; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000378:metabolism; D004947:Esophagus / Q000378:metabolism; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D015151:Immunoblotting; D008297:Male; D008875:Middle Aged; D020133:Reverse Transcriptase Polymerase Chain Reaction