Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

Listeria monocytogenes is a bacterial pathogen that invades cultured nonphagocytic cells. Inhibitors and a dominant negative mutation were used to demonstrate that efficient entry requires the phosphoinositide (PI) 3-kinase p85α-p110. Infection with L. monocytogenes caused rapid increases in cellular amounts of PI(3,4)P 2 and PI(3,4,5)P 3 , indicating that invading bacteria stimulated PI 3-kinase activity. This stimulation required the bacterial protein InlB, host cell tyrosine phosphorylation, and association of p85α with one or more tyrosine-phosphorylated proteins. This role for PI 3-kinase in bacterial entry may have parallels in some endocytic events.

Bibliography

Ireton, K., Payrastre, B., Chap, H., Ogawa, W., Sakaue, H., Kasuga, M., & Cossart, P. (1996). A Role for Phosphoinositide 3-Kinase in Bacterial Invasion. Science, 274(5288), 780–782.

Authors 7
  1. Keith Ireton (first)
  2. Bernard Payrastre (additional)
  3. Hugues Chap (additional)
  4. Wataru Ogawa (additional)
  5. Hiroshi Sakaue (additional)
  6. Masato Kasuga (additional)
  7. Pascale Cossart (additional)
References 21 Referenced 270
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  18. Vero cells were grown in Dulbecco's modified Eagle's medium (DMEM) with fetal calf serum (10%) (Gibco) and Non-Essential Amino Acids (Gibco). Caco-2 cells were grown as described (13) and used between passages 78 and 86. Subconfluent monolayers of cells for invasion tests were obtained by seeding 2 × 104 Vero or 4 × 104 Caco-2 cells per well in 24-well tissue culture plates and incubating at 37°C in 10% C02 for 2 days before the test. Strain EGD (13) was prepared for invasion tests as described (2) and a multiplicity of infection (MOI) of about 100 bacteria per cell was used. Vero or Caco-2 cells were treated with wortmannin (Sigma or Biomol) or LY294002 (Biomol) 20 min before infection as well as during the 60-min infection. Inhibitors were added from 1000× solutions in DMSO and therefore DMSO was added at a final concentration of 0.1% in the control (0 concentration). At the concentrations used the inhibitors had no effect on cell or bacterial viability as assayed by the [3-(4 5-dimethylthiazol-2-yl)-2 5-diphenyl-tetrazolium bromide (MTT)] test (19) or titering of viable bacteria respectively. The inhibitors also did not affect bacterial adhesion to Vero or Caco-2 cells.
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  20. Similar increases in labeled PI(3 4)P2 and PI(3 4 5)P3 were observed when a smaller MOI was used (100:1) except that these increases were slightly smaller and apparent 15 to 30 min after infection.
  21. Supported by grants from the Ministere de l'Agriculture et la Peche (R94-35) DRET (93-109) INSERM (CRE93013) the Ministere de la Recherche (ACCSV6) and the Pasteur Institute. K.I. is a recipient of a fellowship from the Jane Coffin Childs Memorial Fund for Medical Research. We thank P. Boquet for suggesting wortmannin and Jerôme Mengaud for critically reading the manuscript.
Dates
Type When
Created 23 years, 1 month ago (July 27, 2002, 5:45 a.m.)
Deposited 1 year ago (Aug. 7, 2024, 7:27 a.m.)
Indexed 1 month, 3 weeks ago (July 11, 2025, 6:26 a.m.)
Issued 28 years, 10 months ago (Nov. 1, 1996)
Published 28 years, 10 months ago (Nov. 1, 1996)
Published Print 28 years, 10 months ago (Nov. 1, 1996)
Funders 0

None

@article{Ireton_1996, title={A Role for Phosphoinositide 3-Kinase in Bacterial Invasion}, volume={274}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.274.5288.780}, DOI={10.1126/science.274.5288.780}, number={5288}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Ireton, Keith and Payrastre, Bernard and Chap, Hugues and Ogawa, Wataru and Sakaue, Hiroshi and Kasuga, Masato and Cossart, Pascale}, year={1996}, month=nov, pages={780–782} }