Combined action of a low intensive physical factor and a chemotherapeutic agent in ultralow doses against Lewis lung carcinoma was studied. Antitumor activity of low intensiwe electromagnetic field was expressed as inhibition of tumor growth at 60% compare to control. Ultra low doses of doxorubicin as well as its standard dose resulted in inhibition of tumor growth by 60-70% in comparison with control. Joint action of both factors leaded to increasing in the antitumor effect that reached such level of tumor growth inhibition as 85% relative to control.
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