Phytonutrients Differentially Stimulate NAD(P)H:Quinone Oxidoreductase, Inhibit Proliferation, and Trigger Mitotic Catastrophe in Hepa1c1c7 Cells

Steven J.T. Jackson, Keith W. Singletary, Laura L. Murphy, Richard C Venema, Andrew J. Young

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Phytonutrients have rapidly emerged as natural food chemicals possessing multifaceted biological actions that may support beneficial health outcomes. Among the vast array of phytonutrients currently being studied, sulforaphane, curcumin, quercetin, and resveratrol have been frequently reported to stimulate the expression of endogenous detoxification enzymes and may thereby facilitate the neutralization of otherwise harmful environmental agents. Some of these same phytonutrients, however, have also been implicated in disrupting normal cell proliferation and hence may possess toxic properties in and of themselves. In this study, we characterize the respective minimum threshold concentrations of the aforementioned phytonutrients in Hepa1c1c7 cells that stimulate NAD(P)H:quinone oxidoreductase (NQO1), a key enzyme in the hepatic neutralization of menadione, other biological oxidants, and some environmental carcinogens. Moreover, our findings demonstrate that relatively low concentrations of either sulforaphane or curcumin significantly (P < .05) increase NQO1 protein expression and activity without triggering G2/M cell cycle arrest or mitotic catastrophe. The minimal quercetin concentration inducing NQO1, however, was 100-fold higher than that which disrupted mitosis. Also, while resveratrol modestly stimulated NQO1, the minimally effective resveratrol concentration concomitantly induced evidence of cellular apoptosis. Taken together, these findings indicate that only particular phytonutrients are likely efficacious in upregulating NQO1 activity without also leading to hepatic cytotoxicity.

Original languageEnglish (US)
Pages (from-to)47-53
Number of pages7
JournalJournal of Medicinal Food
Volume19
Issue number1
DOIs
StatePublished - Jan 1 2016

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Phytochemicals
NAD
Oxidoreductases
Curcumin
Quercetin
G2 Phase Cell Cycle Checkpoints
Environmental Carcinogens
Vitamin K 3
Poisons
Liver
Enzymes
Mitosis
Oxidants
Cell Proliferation
benzoquinone
Apoptosis
Food
Health
resveratrol
Proteins

Keywords

  • cell cycle
  • curcumin
  • quercetin
  • resveratrol
  • sulforaphane

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

Cite this

Phytonutrients Differentially Stimulate NAD(P)H:Quinone Oxidoreductase, Inhibit Proliferation, and Trigger Mitotic Catastrophe in Hepa1c1c7 Cells. / Jackson, Steven J.T.; Singletary, Keith W.; Murphy, Laura L.; Venema, Richard C; Young, Andrew J.

In: Journal of Medicinal Food, Vol. 19, No. 1, 01.01.2016, p. 47-53.

Research output: Contribution to journalArticle

Jackson, Steven J.T. ; Singletary, Keith W. ; Murphy, Laura L. ; Venema, Richard C ; Young, Andrew J. / Phytonutrients Differentially Stimulate NAD(P)H:Quinone Oxidoreductase, Inhibit Proliferation, and Trigger Mitotic Catastrophe in Hepa1c1c7 Cells. In: Journal of Medicinal Food. 2016 ; Vol. 19, No. 1. pp. 47-53.
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