Abstract |
Inhibitory effects on some immunological responses and MethA fibrosarcoma in the double grafted tumor system in mice were compared between 6-mercaptopurine (6-MP) and its novel water-soluble derivative, gamma-(9H-purine-6-yl)thiomethyl L-glutamate (6-MPG). The dose-dependent inhibitory effects by 6-MPG on the hemagglutinin response to SRBC, DTH reaction to MBSA, contact sensitivity to oxazolone, GVH response and growth of the primary tumor were 3-10 times weaker than those by 6-MP, probably reflecting the difference in their cytotoxicities antimetabolites. However, the two drugs were nearly equipotent in reproducing inhibition of the secondary tumor growth, which is a host-mediated immunological response to tumor antigen as shown by its dependency on the primary inoculation with 1 x 10(4) or more MethA cells and by the production of anti- tumor splenocytes in tumor-bearing animals (the Winn assay). Thus, 6-MPG may point to the direction of derivatization towards anti- tumor immunopotentiators with an improved therapeutic index.
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Authors | T Kashida, N Narasaki, K Tsujihara, K Naito, S Takeyama |
Journal | International journal of immunopharmacology
(Int J Immunopharmacol)
Vol. 18
Issue 5
Pg. 311-9
(May 1996)
ISSN: 0192-0561 [Print] England |
PMID | 8933210
(Publication Type: Journal Article)
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Chemical References |
- Adjuvants, Immunologic
- Mercaptopurine
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Topics |
- Adjuvants, Immunologic
(pharmacology)
- Adoptive Transfer
- Animals
- Cell Division
(drug effects, immunology)
- Fibrosarcoma
(drug therapy, immunology, secondary)
- Hemagglutination
(drug effects)
- Male
- Mercaptopurine
(analogs & derivatives, pharmacology)
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Neoplasm Transplantation
- Sarcoma, Experimental
(drug therapy, immunology, secondary)
- Solubility
- Spleen
(transplantation)
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