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N TRAININ

Publications and source records attributed to N TRAININ.

At least 19 recordsLinked to original sources
PubMed1964

HUMORAL THYMIC FACTOR IN MICE: FURTHER EVIDENCE.

Mice of the C3H and DBA strains thymectomized at birth showed a consistent and striking suppression of antibody production (hemolysin response) to sheep erythrocytes. When cell-tight Millipore diffusion chambers containing syngeneic thymic tissue were implanted intraperitoneally, the capacity of these neonatally thymectomized mice to respond to this antigen was restored. The pattern of response and the mean titer were similar to the pattern and mean titer observed in neonatally thymectomized mice bearing subcutaneous grafts of syngeneic thymic tissue. These data are consistent with the concept that thymic tissue within the chamber produced a specific diffusible factor that enabled the thymectomized animal to establish immunologic competence.

Animals↗
PubMed1961

Leukemogenesis by urethan in C57B1 mice bearing isologous tissues from x-irradiated mice.

A single exposure of mice of a low-leukemic strain (C57B1/6) to 400 r of total-body x-irradiation caused the early appearance of a factor which, though not itself capable of inducing leukemia in adult C57B1 recipients, did cause its appearance when the recipients also received urethan by injection. Positive results were obtained with seven different tissues from irradiated animals, whether urethan was injected 1 day or 30 days after the irradiation. No such effect was obtained in either series in the absence of urethan treatment. When urethan was injected into normal C57B1 mice, or into mice previously implanted with tissues from nonirradiated mice, only marginal leukemogenic activity was evinced. The possible involvement of a precursor virus is discussed.

Animals↗
PubMed1960

Possible two-stage mechanism in experimental leukemogenesis.

The augmenting influence of urethan on leukemogenesis by x-radiation in mice has been found to operate when the urethan treatment follows the radiation, but not when the sequence is reversed. The result is in keeping with the idea that urethan acts as a promoting factor in leukemogenesis, as defined by the twostage mechanism hypothesis of carcinogenesis. It may also have a practical bearing on leukemia development in man.

Animals↗