title: Mucin expression and proliferating cell index of esophageal Barrett's adenocarcinoma.
abstract: Barrett's esophagus is a premalignant condition associated with gastroesophageal reflux disease, and consists of mucosa with a metaplastic columnar epithelium (specialized columnar epithelium). In this study, we examined the expression of mucin and the Ki-67 labeling index (LI) in 15 cases of esophageal Barrett's adenocarcinoma, and clarified the significance of incomplete intestinal metaplasia of Barrett's mucosa as a premalignant lesion. Gastric mucin (MUC5AC, HGM, and/or MUC6) was detected in 93.3% of the adenocarcinomas, while MUC2 and CD10 (markers of intestinal phenotypes) were detected in 73.3% and 46.2%, respectively. The Ki-67 LI was 34.1% in Barrett's adenocarcinoma. In all cases, gastric mucin was found in the non-neoplastic Barrett's mucosa around the adenocarcinoma. MUC2 was detected in 86.7% of proximal non-neoplastic mucosa and 100% of distal non-neoplastic mucosa, while CD10 was found in 20.0% of proximal non-neoplastic mucosa and 40.0% of distal non-neoplastic mucosa of Barrett's adenocarcinoma. In conclusion, Barrett's esophageal mucosa with intestinal metaplasia and a high Ki-67 LI is suggested to be more important as a premalignant lesion, and predominantly found in the proximal rather than distal region of Barrett's esophagus.
authors.affiliation: Department of Surgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan.
authors.forename: Soichiro
authors.initials: S
authors.lastname: Yamamoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kijima
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hara
authors.forename: Osamu
authors.initials: O
authors.lastname: Chino
authors.forename: Hideo
authors.initials: H
authors.lastname: Shimada
authors.forename: Makiko
authors.initials: M
authors.lastname: Tanaka
authors.forename: Sadaki
authors.initials: S
authors.lastname: Inokuchi
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Makuuchi
mesh_terms: D000230:Adenocarcinoma / Q000378:metabolism / Q000473:pathology*; D001471:Barrett Esophagus / Q000378:metabolism / Q000473:pathology*; D004938:Esophageal Neoplasms / Q000378:metabolism / Q000473:pathology*; D005752:Gastric Mucins / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000032:analysis*; D055271:Mucin 5AC; D055262:Mucin-2; D055272:Mucin-6; D009077:Mucins / Q000032:analysis*; D015260:Neprilysin / Q000032:analysis
chemical_list: D005752:Gastric Mucins; D019394:Ki-67 Antigen; C524625:MUC2 protein, human; C524678:MUC5AC protein, human; C524734:MUC6 protein, human; D055271:Mucin 5AC; D055262:Mucin-2; D055272:Mucin-6; D009077:Mucins; D015260:Neprilysin