Lectin binding and expression of blood group-related antigens in carcinoma-in-situ and invasive carcinoma of urinary bladder.
To determine whether histochemical reactivities of carcinoma-in-situ of the urinary bladder differ from those of invasive transitional cell carcinoma, we tested a profile of eight different lectins and three antibodies directed against blood group-related antigens for 15 cases of carcinoma-in-situ and 26 cases of non-papillary (6 superficially and 20 deeply) invasive transitional cell carcinoma that had been diagnosed according to the histopathological criteria of the International Union against Cancer. For biotin-labelled lectins and monoclonal antibodies to mouse blood group-related antigens, the avidin-biotin peroxidase complex method was applied. Positive histochemical reactions of peanut agglutinin without neuraminidase treatment--PNA N(-)--in the 20 deeply invasive tumour cases were significantly higher than those in the 15 carcinoma-in-situ cases (P < 0.05). In contrast, the reactions of blood group-related antigens in the 20 deeply invasive tumour cases were significantly lower than those in the 15 carcinoma-in-situ cases or the 11 normal controls (P < 0.05). The results confirm previously reported studies of the staining of PNA N(-) and blood group-related antigens on carcinoma-in-situ and invasive tumours of urothelial organs. The application of lectins and blood group-related antigens to the histopathology of urinary bladder cancer may be helpful in the differential diagnosis of carcinoma-in-situ from invasive cancer, but neither PNA N(-) nor blood group-related antigens can be solely reliable in this.
Nakanishi
K
K
Department of Pathology, National Defense Medical College, Saitama, Japan.
Kawai
T
T
Suzuki
M
M
D001789:Blood Group Antigens / Q000276:immunology; D002240:Carbohydrate Sequence; D002278:Carcinoma in Situ / Q000473:pathology*; D002295:Carcinoma, Transitional Cell / Q000473:pathology*; D006801:Humans; D007124:Immunoenzyme Techniques; D007519:Isoantigens / Q000032:analysis*; D037102:Lectins / Q000378:metabolism*; D008969:Molecular Sequence Data; D001749:Urinary Bladder Neoplasms / Q000473:pathology*
D001789:Blood Group Antigens; D007519:Isoantigens; D037102:Lectins