Suppressor cells in tumor-bearing mice capable of nonspecific blocking of in vitro immunization against transplant antigens.
J Immunol
; 114(5): 1554-6, 1975 May.
Article
em En
| MEDLINE
| ID: mdl-123545
ABSTRACT
Spleen cells from mice with progressively-growing methyl-cholanthrene-induced tumors, when immunized in vitro against transplant alloantigens, developed less cytotoxic activity against these antigens as measured by a short-term chromium-release assay than did spleen cells from normal mice. The hyporesponsiveness of spleen cells from the tumor-bearing mice seemed to be due to the presence of suppressor cells which could be removed by nylon-column passage but not by anti-theta treatment and which, in mixture experiments, could inhibit the response of normal spleen cells. The suppression appeared to occur at the sensitization stage and not at the effector stage of the in vitro tests. No evidence was found for mediation of the suppression by soluble factors. These observations emphasize the growing importance of suppressive mechanisms in tumor immune systems.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Antígenos de Neoplasias
/
Neoplasias Experimentais
Limite:
Animals
Idioma:
En
Revista:
J Immunol
Ano de publicação:
1975
Tipo de documento:
Article