Lymphocytes immune to a highly immunogenic ("xenogenized") variant of a murine lymphoma-which were shown to exert anti-xenogenized tumor activity in a previously described model of tumor immunotherapy-were tested in the present study for possible suppressive effects on the growth of an i.c. graft of
Induction of tumor suppression and delayed-type footpad reaction by transfer of lymphocytes sensitized to a xenogenized tumor variant
โ Scribed by R. Bianchi; L. Romani; P. Puccetti; M. C. Fioretti
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- French
- Weight
- 570 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0020-7136
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โฆ Synopsis
Splenocytes immune to a highly immunogenic ("xenogenized", LS178Y/DTIC) variant of a murine lymphoma exert anti-parental-tumor activity in a systemic adoptive transfer system, the effect being apparently associated with the Lyt-2fraction of the lymphocyte population. During investigation of the mechanisms of this protection, we found that the LS178Y/DTIC tumor-immune lymphocytes exhibited an appreciable anti-15 178Y delayed-type hypersensitivity (DTH) response. Enrichment of those lymphocytes in L3T4' cells significantly enhanced the protective effect as well as the DTH reaction, whereas the use of an anti-L3T4 but not anti-Lyt-2 reagent blocked both activities. In vitro, lymphocyte proliferation against LS l78Y cells occurred and was apparently associated with the Lyt-2-fraction of a population of LS 178Y/DTIC immune splenocytes.
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