alexa The effects of a protease inhibitor fraction from tepary bean (Phaseolus acutifolius) on in vitro cell proliferation and cell adhesion of transformed cells.


Journal of Glycobiology

Author(s): GarcaGasca T, SalazarOlivo LA, MendiolaOlaya E, BlancoLabra A

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Abstract Some protease inhibitors (PI), such as the soybean Bowman-Birk protease inhibitor (SBBI), have been described as anticarcinogenic agents. Although PI are ubiquitous compounds in living organisms, the anticarcinogenic potential of PIs other than SBBI remain poorly explored. We evaluated the antiproliferative effect of a protein fraction from tepary bean (Phaseolus acutifolius) seeds with protease inhibitor activity (TPIF), on normal and on malignant cells. TPIF was obtained after precipitation with ammonium sulfate and gel filtration, and its bioactivity was assayed in vitro on HeLa cells, normal 3T3 fibroblasts and 3T3/v-mos transformed fibroblasts. TPIF showed antiproliferative and cytotoxic effects on 3T3/v-mos transformed fibroblasts in a dose-dependent way. On the contrary, TPIF was only cytostatic for normal 3T3 cells at the highest doses assayed, and had no effect on epithelial HeLa cells proliferation. Sublethal TPIF doses also stimulated cell adhesion of poorly adherent 3T3/v-mos cell line.
This article was published in Toxicol In Vitro and referenced in Journal of Glycobiology

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