Catechin derivatives: specific inhibitor for caspases-3, 7 and 2, and the prevention of apoptosis at the cell and animal levels.

Abstract:

:Tea-catechin derivatives are shown to inhibit activities of caspases-3, 2 and 7 in vitro, and prevented experimental apoptosis at the cell and animal levels. Epigallo-catechin-gallate showed the strongest inhibition at 1 x 10(-7)M to these caspases, but cysteine cathepsins and caspase-8 were not inhibited. Caspase-3 inhibition showed a 2nd-order allosteric-type, but the inhibition of caspases-2 and 7 showed a non-competitive-type. The apoptosis-test using cultured HeLa cells was inhibited by these catechins. In rat hepatocytes, apoptosis was induced by d-galactosamine in vivo. In this case, caspase-3 activity in the cytoplasm, the serum aminotransferases and dUTP nick formation detected by TUNNEL-staining were effects, and these elevations were suppressed by administration of catechin.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Katunuma N,Ohashi A,Sano E,Ishimaru N,Hayashi Y,Murata E

doi

10.1016/j.febslet.2005.12.087

keywords:

subject

Has Abstract

pub_date

2006-02-06 00:00:00

pages

741-6

issue

3

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(05)01572-3

journal_volume

580

pub_type

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