Microwave Effects on Granulocyte and Macrophage Precursor Cells of Mice in Vitro

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Abstract
Colony-forming unit cells from the femurs and tibias of 2 mo. old C3H mice were exposed to 2450-MHz CW [continuous wave] microwaves in a specially designed fluid-filled waveguide exposure system. The cells were suspended in glass micropipets and exposed to 30-1000 mW/cm2 of incident power densities corresponding to specific absorption rates of 60-2000 mW/g for 15 min. No reduction occurred in the number of colonies formed on days 6 and 12 at 30 mW/cm2 (60 mW/g). Increased exposure to a level of 1000 mW/cm2 (2000 mW/g) produced a corresponding reduction in the number of colonies formed by microwave-treated cells, compared to sham-exposed cells. A dose-dependent reduction occurs in the number of colonies formed by microwave-exposed bone marrow cells.