| First Author | Baumgart J | Year | 1989 |
| Journal | Neoplasma | Volume | 36 |
| Issue | 4 | Pages | 393-400 |
| PubMed ID | 2770926 | Mgi Jnum | J:27903 |
| Mgi Id | MGI:75537 | Citation | Baumgart J, et al. (1989) Age-dependent antileukemic action and suppression of immune response by 1,4-benzoquinone-guanylhydrazone-thiosemicarbazone (ambazone) in mice. Neoplasma 36(4):393-400 |
| abstractText | The antineoplastic activity of 1,4-benzoquinone-guanylhydrazone-thiosemicarbazone (ambazone) against murine leukemia P388 was found to be markedly reduced in 12- and 18-month-old mice as compared to young animals. The immune response against sheep red blood cells (SRBC), a T cell-dependent antigen, was also strongly diminished in tumor-free old mice and was further suppressed after ambazone treatment. Since the antileukemic effect of ambazone disappeared more or less in congenitally athymic nude mice, in neonatally thymectomized or silica-pretreated animals, it has been concluded that the action of the compound seems to be limited to young adult immunocompetent tumor-bearing hosts. Therefore immunosenescence, primarily of T cell functions of old tumor-bearers, may represent a decisive factor influencing the antileukemic, especially curative effect of ambazone in aged animals. A combined treatment with ambazone and immunomodulators (thymalin or a splenopentin derivative) failed to improve the antileukemic effect in young and old leukemia P388-bearing mice. |
