title: Increased expression of sialyl Lewis A and sialyl Lewis X in liver metastases of human colorectal carcinoma.
abstract: Sialyl Lewis A (SLA) and sialyl Lewis X (SLX) have been shown to be specific ligands for endothelial leukocyte adhesion molecule-1 (ELAM-1), and may be involved in the process of adhesion between cancer cells and endothelium. We used immunohistochemical methods to study the expression of SLA, SLX and CEA in both primary tumors and matched metastatic liver lesions of colorectal carcinomas. Specimens from primary tumors and matched liver metastases from 24 patients with colorectal carcinomas were studied immunohistochemically. The degree of expression of CEA in liver metastases was similar to that in primary tumors, but SLA and SLX were expressed on a larger proportion of tumor cells in liver metastases than in primary tumors. Our findings suggest that colorectal carcinoma cells expressing SLA and/or SLX form metastatic liver tumors. They also suggest that expression of SLA and SLX in primary of colorectal carcinoma can be used as a prognostic indicator of metastasis.
authors.affiliation: First Department of Surgery, Osaka City University Medical School, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Yamada
authors.forename: Y S
authors.initials: YS
authors.lastname: Chung
authors.forename: K
authors.initials: K
authors.lastname: Maeda
authors.forename: T
authors.initials: T
authors.lastname: Sawada
authors.forename: T
authors.initials: T
authors.lastname: Ikehara
authors.forename: H
authors.initials: H
authors.lastname: Nishino
authors.forename: M
authors.initials: M
authors.lastname: Okuno
authors.forename: M
authors.initials: M
authors.lastname: Sowa
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000096:biosynthesis*; D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen / Q000096:biosynthesis; D015179:Colorectal Neoplasms / Q000378:metabolism / Q000473:pathology*; D005260:Female; D005732:Gangliosides / Q000096:biosynthesis*; D006801:Humans; D007150:Immunohistochemistry; D007983:Lewis Blood Group Antigens; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology / Q000556:secondary*; D008297:Male; D008875:Middle Aged; D009844:Oligosaccharides / Q000096:biosynthesis*; D000080506:Sialyl Lewis X Antigen
chemical_list: D014408:Biomarkers, Tumor; D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen; D005732:Gangliosides; D007983:Lewis Blood Group Antigens; D009844:Oligosaccharides; D000080506:Sialyl Lewis X Antigen; C064564:sialyl Le(a) ganglioside