title: Expression of receptor for advanced glycation end products and HMGB1/amphoterin in colorectal adenomas.
abstract: Receptor for advanced glycation end products (RAGE) is associated with invasion, metastasis, and poor prognosis in colorectal cancer. We studied the expression of RAGE in colorectal adenomas to elucidate the role of RAGE in cancer development. Expressions of RAGE and high-mobility group box-1 (HMGB1)/amphoterin RAGE ligand were examined in 96 colorectal adenomas using immunohistochemistry and in situ hybridization, respectively. Positivity and expression pattern of RAGE were compared with atypia, histological types, size, and HMGB1/amphoterin expression. Of 96 adenomas, 34 (35%) showed RAGE expression. RAGE positivity was significantly higher in adenomas with severe atypia (18/20, P<0.0001) and large-sized adenomas (-15 mm) (18/22, P<0.0001). RAGE expression showed three patterns: cytosolic (n=10), luminal (n=14), and membranous (n=10). Cytosolic pattern was associated with mild atypia and small size (-5 mm). Membranous pattern was associated with severe atypia, villous histological type, and co-expression with overexpressed HMGB1/amphoterin. These results suggest that RAGE expression, especially with membranous pattern, is associated with malignant potential of colorectal adenomas.
authors.affiliation: Department of Molecular Pathology, Nara Medical University, 840 Shijo-cho, Kashihara, Nara, 634-8521, Japan.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Sasahira
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Akama
authors.forename: Kiyomu
authors.initials: K
authors.lastname: Fujii
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kuniyasu
mesh_terms: D000236:Adenoma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism; D015179:Colorectal Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D005260:Female; D024243:HMGB1 Protein / Q000378:metabolism*; D006801:Humans; D007124:Immunoenzyme Techniques; D017403:In Situ Hybridization; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000378:metabolism; D000067759:Receptor for Advanced Glycation End Products; D011971:Receptors, Immunologic / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D024243:HMGB1 Protein; D009363:Neoplasm Proteins; D000067759:Receptor for Advanced Glycation End Products; D011971:Receptors, Immunologic