title: Aberrant expression of cdx2 homeobox gene in intraductal papillary-mucinous neoplasm of the pancreas but not in pancreatic ductal adenocarcinoma.
abstract: OBJECTIVE
  The authors investigated differential expression of cdx2 in intraductal papillary mucinous neoplasm of the pancreas (IPMN) and ductal adenocarcinoma.
  
  
  METHODS
  Patients with IPMN (n = 23) and pancreatic ductal adenocarcinoma (n = 30) were studied. Expression of cdx2 mRNA, CDX2 protein, muc2 mRNA, MUC2 apomucin, and MUC5AC apomucin were determined.
  
  
  RESULTS
  Of 23 IPMN, expression of cdx2 was detected in 8 of 9 adenomas, 6 of 8 borderline malignancies, and 3 of 6 malignancies, respectively. Of the 3 cdx2-expressing malignant IPMN, 2 did not display CDX2 expression. The appearance of CDX2-positive neoplastic cells in IPMN coincided with that of MUC2-positive neoplastic cells. All 23 IPMN displayed a positive MUC5AC expression irrespective to the status of CDX2 expression. Of 30 ductal adenocarcinomas, none displayed cdx2, CDX2, and MUC2 expression, while 10 cases displayed positive MUC5AC expression.
  
  
  CONCLUSIONS
  Aberrant expression of cdx2 homeobox gene was detected in IPMN but not in ductal adenocarcinoma, which might determine their diverse carcinogenesis.
authors.affiliation: Department of Surgery, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan. surglab@adm.cgmh.org.tw
authors.forename: Ta-Sen
authors.initials: TS
authors.lastname: Yeh
authors.forename: Yu-Pin
authors.initials: YP
authors.lastname: Ho
authors.forename: Cheng-Tang
authors.initials: CT
authors.lastname: Chiu
authors.forename: Tse-Ching
authors.initials: TC
authors.lastname: Chen
authors.forename: Yi-Yi
authors.initials: YY
authors.lastname: Jan
authors.forename: Miin-Fu
authors.initials: MF
authors.lastname: Chen
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics / Q000503:physiopathology; D002288:Adenocarcinoma, Mucinous / Q000235:genetics* / Q000503:physiopathology; D000328:Adult; D000368:Aged; D000071616:CDX2 Transcription Factor; D021441:Carcinoma, Pancreatic Ductal / Q000235:genetics* / Q000503:physiopathology; D002291:Carcinoma, Papillary / Q000235:genetics* / Q000503:physiopathology; D002471:Cell Transformation, Neoplastic / Q000235:genetics; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D018398:Homeodomain Proteins / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000235:genetics* / Q000503:physiopathology
chemical_list: D000071616:CDX2 Transcription Factor; C491270:CDX2 protein, human; D018398:Homeodomain Proteins