Shigella-induced apoptosis is dependent on caspase-1 which binds to IpaB

We report here that the Shigella invasion plasmid antigen (Ipa)B, which is sufficient to induce apoptosis in macrophages, binds to caspase (Casp)-1, but not to Casp-2 or Casp-3. Casp-1 is activated and its specific substrate interleukin-1beta is cleaved shortly after Shigella infection. Macrophages isolated from Casp-1 knock-out mice are not susceptible to Shigella-induced apoptosis, although they respond normally to other apoptotic stimuli. Shigella kills macrophages from casp-3, casp-11, and p53 knock-out mice as well as macrophages overexpressing Bcl-2. We propose that Shigella induces apoptosis by directly activating Casp-1 through IpaB, bypassing signal transduction events and caspases upstream of Casp-1. Taken together these data indicate that Shigella-induced apoptosis is distinct from other forms of apoptosis and seems uniquely dependent on Casp-1.

Medienart:

Artikel

Erscheinungsjahr:

1998

Erschienen:

1998

Enthalten in:

Zur Gesamtaufnahme - volume:273

Enthalten in:

The Journal of biological chemistry - 273(1998), 49 vom: 04. Dez., Seite 32895-900

Sprache:

Englisch

Beteiligte Personen:

Hilbi, H [VerfasserIn]
Moss, J E [VerfasserIn]
Hersh, D [VerfasserIn]
Chen, Y [VerfasserIn]
Arondel, J [VerfasserIn]
Banerjee, S [VerfasserIn]
Flavell, R A [VerfasserIn]
Yuan, J [VerfasserIn]
Sansonetti, P J [VerfasserIn]
Zychlinsky, A [VerfasserIn]

Themen:

127384-62-7
Bacterial Proteins
Caspase 1
EC 3.4.22.36
IpaB protein, Shigella
Journal Article
Proto-Oncogene Proteins c-bcl-2
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
Tumor Suppressor Protein p53

Anmerkungen:

Date Completed 08.01.1999

Date Revised 09.02.2021

published: Print

Citation Status MEDLINE

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM09767799X