Increased expression of sialyl-dimeric LeX antigen in liver metastases of human colorectal carcinoma.
Cancer Res
; 49(24 Pt 1): 6883-8, 1989 Dec 15.
Article
en En
| MEDLINE
| ID: mdl-2573422
ABSTRACT
We collected a total of 78 tissue specimens, including primary colorectal carcinoma, normal colonic mucosa, and liver metastases of colon carcinoma, to examine whether the extracts of these tissues inhibited the binding of a monoclonal antibody FH6, specific for sialyl-dimeric LeX antigen. The results of inhibition assays demonstrated that (a) contents of FH6-reactive molecules were greater in carcinoma tissues than in normal colonic mucosa; (b) metastatic foci in livers contained more FH6-reactive molecules than primary tumors; (c) primary tumors from Dukes' stage B1 patients contained less FH6-reactive molecules than primary tumors from Dukes' stage D patients. The inhibitory activity of these tumor tissue extracts against the binding of a monoclonal antibody FH6 to cultured colon carcinoma cells was eliminated by prior treatment of the extracts with sialidase, confirming that the FH6-reactive materials were sialyl-dimeric LeX antigen. Electrophoretic separation of tumor tissue extracts on 3% polyacrylamide gels followed by direct staining with monoclonal antibody FH6 revealed that very high molecular weight glycoproteins, presumably mucins, contained sialyl-dimeric LeX antigen.
Search on Google
Banco de datos:
MEDLINE
Asunto principal:
Glucolípidos
/
Neoplasias Colorrectales
/
Neoplasias Hepáticas
/
Antígenos de Neoplasias
Límite:
Humans
Idioma:
En
Año:
1989
Tipo del documento:
Article