Sulforaphane and its metabolite mediate growth arrest and apoptosis in human prostate cancer cells.

Abstract:

:The relation between the consumption of cruciferous vegetables and reduced prostate cancer occurrence has been documented, although the responsible phytochemicals are unknown. The effects of sulforaphane (SFN) which occurs as the precursor glucosinolate in broccoli and other cruciferous vegetables, and its metabolite N-acetylcysteine conjugate (SFN-NAC) on prostate cancer cells were investigated. SFN and SFN-NAC were analyzed with the androgen-dependent human prostate cancer LNCaP cell line model. Cell growth and apoptosis were determined with the expression of androgen receptor and prostate specific antigen, DNA synthesis, cell cycle progression, DNA strand breaks and caspase activation to ascertain the effects and mechanism. SFN and SFN-NAC were demonstrated for the first time to mediate a dose-dependent apoptosis and growth arrest in the prostate cancer cells. Caspases were activated and DNA strand breaks were detected in apoptotic cells. The expression of phosphorylated and dephosphorylated androgen receptors, and the production of prostate specific antigen were attenuated. The expression of cyclin D1 and DNA synthesis were inhibited along with G1 cell cycle block, causing decreased cell density and growth. SFN and its metabolite SFN-NAC have similar activities to induce growth arrest and apoptosis, indicating that the effects of SFN are maintained through the metabolic processes. SFN as a dietary component of cruciferous vegetables active in the prevention of prostate cancer is discussed.

journal_name

Int J Oncol

authors

Chiao JW,Chung FL,Kancherla R,Ahmed T,Mittelman A,Conaway CC

doi

10.3892/ijo.20.3.631

keywords:

subject

Has Abstract

pub_date

2002-03-01 00:00:00

pages

631-6

issue

3

eissn

1019-6439

issn

1791-2423

journal_volume

20

pub_type

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