Calpain mediates degradation of cytoskeletal proteins during Jurkat T-cell death induced by Entamoeba histolytica.

Abstract:

:Entamoeba histolytica is known to induce host cell death via activation of calpain and caspases. In this study, we investigated the specific proteases involved in the degradation of cytoskeletal proteins during Jurkat T-cell death induced by E. histolytica. Amoebic trophozoites induced marked degradation of paxillin, Cas, vimentin, vinculin and talin, as well as α- or β-spectrin, in Jurkat T cells. The cleavage effects of E. histolytica were strongly retarded by pretreatment with a calpain inhibitor, but not with a pan-caspase inhibitor. In addition, calpain knockdown with siRNA in Jurkat T cells effectively inhibited E. histolytica-induced PARP, paxillin, α-spectrin, β-spectrin and talin degradation, as compared to scrambled siRNA. These results suggest that calpain plays a crucial role in the cleavage of cytoskeletal proteins during cell death induced by E. histolytica.

journal_name

Parasite Immunol

journal_title

Parasite immunology

authors

Lee YA,Kim KA,Shin MH

doi

10.1111/j.1365-3024.2011.01290.x

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

349-56

issue

6

eissn

0141-9838

issn

1365-3024

journal_volume

33

pub_type

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