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Induction of apoptosis in the LNCaP human prostate carcinoma cell line and prostate adenocarcinomas of SV40T antigen transgenic rats by the Bowman–Birk inhibitor
Author(s) -
Tang MingXi,
Asamoto Makoto,
Ogawa Kumiko,
NaikiIto Aya,
Sato Shinya,
Takahashi Satoru,
Shirai Tomoyuki
Publication year - 2009
Publication title -
pathology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
eISSN - 1440-1827
pISSN - 1320-5463
DOI - 10.1111/j.1440-1827.2009.02445.x
Subject(s) - lncap , prostate cancer , prostate , apoptosis , biology , cancer research , adenocarcinoma , tunel assay , terminal deoxynucleotidyl transferase , intraepithelial neoplasia , cancer , pathology , medicine , endocrinology , biochemistry
The soybean‐derived serine protease inhibitor, Bowman–Birk inhibitor (BBI), has been reported as a potent chemoprevention agent against several types of tumors. The present study was undertaken to evaluate the effects of BBI on androgen‐sensitive/dependent prostate cancers using a human prostate cancer cell (LNCaP) and the transgenic rats developing adenocarcinoma of the prostate (TRAP) model. Treatment of LNCaP prostate cancer cells with 500 µg/mL BBI resulted in inhibition of viability measured on WST‐1 assays, with induction of connexin 43 (C×43) and cleaved caspase‐3 protein expression. Feeding of 3% roughly prepared BBI (BBIC) to TRAP from the age 3 weeks to 13 weeks resulted in significant reduction of the relative epithelial areas within the acinus and multiplicity of the adenocarcinomas in the lateral prostate lobes. C×43‐ and terminal deoxynucleotidyl transferase mediated dUTP‐biotin end labeling of fragmented DNA (TUNEL)‐positive apoptotic cancer cells were more frequently observed in the lateral prostates treated with BBIC than in the controls. These in vivo and in vitro results suggest that BBI possesses chemopreventive activity associated with induction of C×43 expression and apoptosis.