[Hematological toxicity of some combined chemotherapy schemes involving aranoza].

Hematological toxicity of four combined chemotherapy schemes--TAr, TPAr, EPAr, and IPAr--involving aranose (Ar), cisplatin (P), etoposide (E), irinotecan (I), and topotecan (T) in therapeutic regimes has been studied on healthy mice in comparison to the treatment with Ar in a high therapeutic dose. It is established that Ar alone induces early leucopenia, mostly as a result of lymphocytopenia followed by the absolute and relative neutrophilia; the TAr treatment leads to a moderate neutropenia; whereas the ternary combinations cause a moderate lymphocytopenia. A relatively high hematological toxicity among the ternary combinations was observed for TPAr. The total number of erythrocytes and thrombocytes in the peripheral blood of mice under the action of Ar and all combinations remains on the control level. The inclusion of Ar into the indicated schemes neither modifies the spectrum of hematological toxicity nor increases its level. The observed changes in the peripheral blood were reversible and were not accompanied by any impairment in the state of mice. The obtained results allow the combinations involving P, E, I, T, and Ar to be considered as promising for further investigation.

[Effect of lysozyme on the growth of murine lymphoma and antineoplastic activity of cyclophosphamide]. / Vliianie lizotsima na rost myshinoi limfomy i protivoopukholevuiu aktivnost' tsiklofosfamida.

It was shown that hen egg-white lysozyme (LM) in the dose 100 mg/kg under the daily intragastral use slightly inhibited tumor grown or did not influence significantly upon it and did not change antitumor activity of cyclophosphamide. When used at mice C57Bl/6J with the transplanted ascitic or solid T-cell lymphoma EL4 (syngeneic system). On model of the same tumors in ascitic form at mice-hybrids (C57Bl/6J x DBA2)F1 (semisingeneic system) LM significantly potentiates antitumor activity of cyclophosphamide, though it had no effect on the rate of tumor growth. Potentiation of the effect of cyclophosphamide revealed itself in more slow development of ascite, increased mean life-span and the overall survival, appearance of completely cured animals. Our clinic-laboratory studies have revealed a sharp deficit of endogenic lysozyme in the blood serum of leukemic patients and extremely low lysozyme content in lavage liquid, from leukemic patients, with pneumonia. These data suggest that LM can be useful as a food additive in the complex treatment of oncological patients for enhancing antineoplastic chemotherapy efficacy.

[Somatic hybridization and oncogenesis: induction of tumors in mice by administration of mixtures of cells of the homologous organs and their hybrids]. / Somaticheskaia gibridizatsiia i onkogenez: induktsiia u myshei opukholei vvedeniem smesei kletok gomologichnykh organov i ikh gibridov

The 2 months old C57BL/6J mice were injected with the mixtures of kidney and spleen cells from mice of the same strain or of the same cells following the hybridization induced by Sendai virus. The tumours of liver, kidney and lymphoid system appeared in 25% of recipients within 12--14 months. The result obtained is predicted by the general theory of oncogenesis proposed early by L. B. Mekler.