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Inhibition of proliferation and apoptosis of human and rat T lymphocytes by curcumin, a curry pigment.

Abstract：

:Curcumin (diferuoylmethane), the yellow pigment in the rhizome of tumeric (Curcuma longa), an ingredient of curry spice, is known to exhibit a variety of pharmacological effects including antitumor, antiinflammatory, and antiinfectious activities. Although its precise mode of action remains elusive, curcumin has been shown to suppress the activity of the AP-1 transcription factor in cells stimulated to proliferate. In this study, we observed that curcumin (50 microM) inhibited proliferation of rat thymocytes stimulated with concanavalin A (Con A) as well as that of human Jurkat lymphoblastoid cells in the logarithmic growth phase. The pigment also inhibited apoptosis in dexamethasone-treated rat thymocytes and in UV-irradiated Jurkat cells as judged by DNA ladder formation, cellular morphological changes, and flow cytometry analysis. The inhibition of apoptosis by curcumin in rat thymocytes was accompanied by partial suppression of AP-1 activity. Complete suppression of AP-1 activity was observed in Con A-treated, proliferating thymocytes. The capacity of curcumin to inhibit both cell growth and death strongly implies that these two biological processes share a common pathway at some point and that curcumin affects a common step, presumably involving a modulation of the AP-1 transcription factor.

journal_name

Biochem Pharmacol

journal_title

Biochemical pharmacology

authors

Sikora E,Bielak-Zmijewska A,Piwocka K,Skierski J,Radziszewska E

doi

10.1016/s0006-2952(97)00251-7

subject

Has Abstract

pub_date

1997-10-15 00:00:00

pages

899-907

issue

8

eissn

0006-2952

issn

1873-2968

pii

S0006295297002517

journal_volume

54

pub_type

杂志文章

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