01-06-2007
α1,2Fucosylation Is a Superior Predictor of Postoperative Prognosis for Colorectal Cancer Compared with Blood Group A, B, or Sialyl Lewis X Antigen Generated within Colorectal Tumor Tissues
Published in: Annals of Surgical Oncology | Issue 6/2007
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Background
We have previously demonstrated tumor-specific α1,2fucosylation, which is associated with resistance of tumor cells to anticancer treatment in human colorectal tumor tissues. By using the YB-2 monoclonal antibody, the resulting products have been identified as Y, Leb, and H type 2 antigens in colorectal tumor tissues.
Methods
Immunohistochemical analyses of colorectal cancer tissues (74 specimens) were performed with a newly established mouse monoclonal antibody, YB-3 specifically recognizing H disaccharide (Fucα1,2Galβ) structures, and anti-A, anti-B, YB-2, and anti–sialyl Lewis X (SLX) antibodies, together with the analyses of glycosyltransferases involved in the synthesis of ABH antigens in the same tissues.
Results
The YB-3 antibody enabled us to detect colorectal tumors, particularly tumors in the distal large intestine and the rectum, with high sensitivity (74.3%) and specificity (100%). From immunohistochemical and enzymatic analyses of colorectal tissues, we found that once α1,2fucosylation had proceeded in tumor tissues, blood group A or B antigen was also synthesized in approximately half of the tissues of A or B blood type, but not in their normal tissues. A correlation of survival rate with immunostaining of tissues was found only by YB-3 antibody and not by anti-A, anti-B, or anti-SLX antibody.
Conclusions
As a predictor of postoperative prognosis of patients with colorectal cancer, immunodetection of α1,2fucosylated antigens with the YB-3 antibody seemed to be superior to blood groups A, B, or SLX antigen in colorectal tumor tissues.