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Elimination of cycling CD4+ suppressor T cells with an anti-mitotic drug releases non-cycling CD8+ T cells to cause regression of an advanced lymphoma.
- Source :
-
Immunology . Sep90, Vol. 71 Issue 1, p90-95. 6p. - Publication Year :
- 1990
-
Abstract
- This paper describes a model of successful immunotherapy of advanced lymphoma based on the selective elimination of cycling tumour-induced suppressor T cells. It shows that a single injection of the anti-mitotic drug, vinblasting (Vb), results in complete regression of a large L5178Y lymphoma and its metastases, but not if it is growing in an immunocompetent host. Vb-induced, immunologically mediated tumour regression was dependent on the anti-tumour function of CD8+ T cells, because regression was prevented by depleting the host of this subset of T cells 24 hr after Vb was given. Regression was also prevented by infusing the host with Vb-sensitive, CD4+ T cells from a turnout-bearing donor. These and other results are in keeping with the interpretation that Vbinduced regression of the L5178Y lymphoma depends on the ability of the drug to eliminate CD4+ suppressor T ceils that are replicating, and to spare non-replicating CD8+ effector cells, it is suggested that at an advanced stage of growth of the L5178Y lymphoma the host possesses an acquired population of antigen-primed CD8+ effector T cells that are unable to become activated in response to abundant tumour antigen because of the dominant influence of CD4+ suppressor cells. Activation of these CD8+ T cells was indicated by the finding that they were rapidly converted from being cyclophosphamide (Cy) resistant to being highly Cy sensitive within 48 hr of giving Vb. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CD4 antigen
*SUPPRESSOR cells
*T cells
*IMMUNOSUPPRESSION
*LYMPHOMAS
*MITOSIS
Subjects
Details
- Language :
- English
- ISSN :
- 00192805
- Volume :
- 71
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Immunology
- Publication Type :
- Academic Journal
- Accession number :
- 13379166