Abstract
Exposure of the Dunning R3327AT-3 rat prostatic carcinoma and SK-Mel-28 human melanoma, in vitro, to high energy shock waves resulted in a reduction in cell viability as determined by trypan blue exclusion and a decrease in the number of colonies formed in a clonogenic assay. Flow cytometric determination of DNA content in R3327AT-3 cells treated in vitro indicated a selective diminution of cells in the G2 and M phases of the cell cycle. When R3327AT-3 cells exposed to high energy shock waves were subsequently injected into rats, or tumor bearing animals were treated by high energy shock waves targeted at the tumor, a delay in tumor growth was observed. These observations indicate that high energy shock waves are cytotoxic to tumor cells in vitro and in vivo. Additional research into the possible use of high energy shock waves in the non-invasive destruction of animal and human tumors is warranted.
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