Tumoricidal Activity of RNase A and DNase I

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Abstract

In our work the antitumor and antimetastatic activities of RNase A and DNase I were studied using two murine models of pulmonary (Lewis lung carcinoma) and liver (hepatoma A-1) metastases. We found that intramuscular administration of RNase A at the dose range of 0.1-50 μg/kg retarded the primary tumor growth by 20-40%, and this effect disappeared with the increase in RNase A dose over 0.5 mg/kg. DNase I showed no effect on the primary tumor growth. The intramuscular administration of RNase A (0.35-7 μg/kg) or DNase I (0.02-2.3 mg/kg) resulted in a considerable decrease in the metastasis number into the lungs of animals with Lewis lung carcinoma and a decrease of the hepatic index of animals with hepatoma 1A. A histological analysis of the organs occupied by metastases revealed that the administration of RNase A and DNase I induced metastasis pathomorphism as manifested by the destruction of oncocytes, an increase in necrosis and apoptosis foci in metastases, and mononuclear infiltration. Our data indicated that RNase A and DNase I are highly promising as supplementary therapeutics for the treatment of metastasizing tumors.

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Tumoricidal Activity of RNase A and DNase I
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About the authors

O A Patutina

Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

N L Mironova

Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

E I Ryabchikova

Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

N A Popova

Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

V P Nikolin

Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

V I Kaledin

Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

V V Vlassov

Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

M A Zenkova

Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences

Email: marzen@niboch.nsc.ru

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Copyright (c) 2010 Patutina O.A., Mironova N.L., Ryabchikova E.I., Popova N.A., Nikolin V.P., Kaledin V.I., Vlassov V.V., Zenkova M.A.

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