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Selective Inhibition of Growth of Transformed Cells by Protease Inhibitors

By Hans Peter Schnebli and Max M. Burger


Five protease inhibitors with different modes of action were found to reduce the growth of transformed mouse (Py3T3, SV3T3, and 3T12) and hamster (PyBHK) cells. Some of these inhibitors caused the transformed cells to cease growth at saturation densities characteristic for nontransformed cells. The protease inhibitors were strikingly selective with regard to the transformed cells; they had essentially no effect on the growth of the nontransformed cells. From this result, it is concluded that the inhibitors block a protease-like activity that is required for the unrestrained growth of transformed cells. The inhibitors exerted their effect directly on the cells; they did not affect growth by interacting with serum components of the medium

Topics: Biological Sciences: Cell Biology
Year: 1972
DOI identifier: 10.1073/pnas.69.12.3825
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Provided by: PubMed Central
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