The Bowman-Birk protease inhibitor (BBI) is a legumederived inhibitor of chmotrypsin and trypsin that has been shown to suppress cellular transformation and tumorigenesis. In the present investigation the effects of various BBI adminsitration schedules were evalated for suppression of 3-methylchoilanthrene (3-MCA)-induced transormation of C3H/101T1/2 cells. At a concentration of 30 μg/ml, BBi demonstrated no toxicity to C3H/10T1/2 cells treated with 3-MCA. However, transformation of C3H/10T1/2 cells was significantly reduced with BBI was added to the cultures for a period of 14 days, starting immdediately after exposure to the carcinogen. When BBI was administered only during the time of carcinogen exposure or alternatively beginning on day 15 and then continuously throughtou the remainder of the 6-week transformation assay, it was ineffective for suppressing 3-MCA-induced cellular transformaiton. These findings indicate that BBI exerts its chemopreventive effect during a early stage of chemicalcarcinogen-induced cellular transformation.
|Number of pages||3|
|State||Published - May 1991|
Bibliographical noteFunding Information:
I wish to thank Darlene CantreU for preparation of this manuscript. This study was supported by a grant from the Forsyth County Cancer Service. Bowman-Birk protease inhibitor was generously provided by the Central Soya Company of Fort Wayne, Indiana.
ASJC Scopus subject areas
- Cancer Research