Antigenic relationship between streptococcal preparation OK-432 and tumors and its effect on immunotherapy with OK-432 in patients with superficial bladder tumor.

Abstract:

:The cross-antigenicity between streptococcus, Su strain (OK-432), and rat bladder cancer BC-47 was studied by the immunocytochemistry. Both anti-Su (OK-432) and anti-BC-47 reacted with both homo- and heterogenous antigens. The specificity of the PAP reactions using these sera was confirmed by absorption study of the first antibodies. But, OK-432 did not share with normal rat tissues. Furthermore, the presence of common antigens between OK-432 and animal tumors where OK-432 was effective was indicated by the PAP studies, but OK-432 did not share with tumors where OK-432 was ineffective. By the PAP studies using antigroup A streptococcus-specific C-polysaccharide and antigroup-specific sera, it was suggested that the determinant of the cross-antigenicity was group A-specific C-polysaccharide. The common antigens between OK-432 and human urogenital cancers were also identified by the PAP study. Then, local immunotherapy with OK-432 was carried out in 38 patients with superficial bladder tumor and the tumors were eliminated in 23.7%. In 77.8% of the complete response and in 10.3% of the no change, the tumor tissues demonstrated antigens common between OK-432 and tissues. From these results, it was concluded that common antigens which OK-432 shared with tumors could favorably augment host defense against human bladder tumors, the same as animal tumors.

journal_name

Urol Int

journal_title

Urologia internationalis

authors

Fujioka T,Aoki H,Yoshida M,Ohhori T,Kubo T

doi

10.1159/000281504

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

198-204

issue

4

eissn

0042-1138

issn

1423-0399

journal_volume

44

pub_type

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