title: Immunohistochemical analysis of sialic acid and fucose composition in human colorectal adenocarcinoma.
abstract: The expression of different sialoglycoconjugates and fucoglycoconjugates in normal mucosa and adenocarcinoma samples from 43 colorectal cancer patients was investigated by using specific lectins and applying a semiquantitative analysis. A pronounced decrease in the intracellular binding of the Maackia amurensis lectin, which recognizes alpha(2,3)-linked sialic acid residues, was found in the tumoral tissue. In contrast, a significant increase in the staining with the Sambucus nigra lectin (SNA I), which binds to alpha(2,6)-linked sialic acid residues, was detected in the epithelial cells as well as in the mucins from tumors. No significant differences in the reactivity with the Aleuria aurantia lectin, which recognizes the sequence Fuc(alpha1,6)GlcNAc, between normal and malignant colorectal tissues were detected. Furthermore, the correlation between lectin-binding profiles and the prognosis of colorectal cancer patients was examined. After an average postoperative follow-up period of 31 months, patients with tumors showing a strong SNA I staining presented a greater probability of disease recurrence. This result suggests that the intensity of staining with SNA I could be a valid parameter for predicting recurrence in colorectal cancer.
authors.affiliation: Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Fernández-Rodríguez
authors.forename: C
authors.initials: C
authors.lastname: Feijoo-Carnero
authors.forename: A
authors.initials: A
authors.lastname: Merino-Trigo
authors.forename: M
authors.initials: M
authors.lastname: Páez de la Cadena
authors.forename: F J
authors.initials: FJ
authors.lastname: Rodríguez-Berrocal
authors.forename: A
authors.initials: A
authors.lastname: de Carlos
authors.forename: M
authors.initials: M
authors.lastname: Butrón
authors.forename: V S
authors.initials: VS
authors.lastname: Martínez-Zorzano
mesh_terms: D000230:Adenocarcinoma / Q000737:chemistry* / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000032:analysis / Q000378:metabolism; D015179:Colorectal Neoplasms / Q000737:chemistry* / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D005500:Follow-Up Studies; D005643:Fucose / Q000031:analogs & derivatives / Q000032:analysis* / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D007413:Intestinal Mucosa / Q000737:chemistry / Q000166:cytology / Q000378:metabolism / Q000473:pathology; D037102:Lectins / Q000378:metabolism; D019158:N-Acetylneuraminic Acid / Q000031:analogs & derivatives / Q000032:analysis* / Q000378:metabolism; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D010835:Phytohemagglutinins / Q000378:metabolism; D037121:Plant Lectins; D011379:Prognosis; D054788:Ribosome Inactivating Proteins; D018709:Statistics, Nonparametric; D013379:Substrate Specificity
chemical_list: D015295:Antigens, Tumor-Associated, Carbohydrate; D037102:Lectins; D010835:Phytohemagglutinins; D037121:Plant Lectins; C050600:Sambucus nigra lectins; C064549:lectin, Aleuria aurantia; C100156:leukoagglutinins, plants; D005643:Fucose; D054788:Ribosome Inactivating Proteins; D019158:N-Acetylneuraminic Acid