The DOI matches its Crossref record; 6 of the 6 references it cites were found in a registry or an index.
Caspase-7 Activation by the Nlrc4/Ipaf Inflammasome Restricts Legionella pneumophila Infection
Open accessAbstract
Legionella pneumophila (L. pneumophila), the causative agent of a severe form of pneumonia called Legionnaires' disease, replicates in human monocytes and macrophages. Most inbred mouse strains are restrictive to L. pneumophila infection except for the A/J, Nlrc4(-/-) (Ipaf(-/-)), and caspase-1(-/-) derived macrophages. Particularly, caspase-1 activation is detected during L. pneumophila infection of murine macrophages while absent in human cells. Recent in vitro experiments demonstrate that caspase-7 is cleaved by caspase-1. However, the biological role for caspase-7 activation downstream of caspase-1 is not known. Furthermore, whether this reaction is pertinent to the apoptosis or to the inflammation pathway or whether it mediates a yet unidentified effect is unclear. Using the intracellular pathogen L. pneumophila, we show that, upon infection of murine macrophages, caspase-7 was activated downstream of the Nlrc4 inflammasome and required caspase-1 activation. Such activation of caspase-7 was mediated by flagellin and required a functional Naip5. Remarkably, mice lacking caspase-7 and its macrophages allowed substantial L. pneumophila replication. Permissiveness of caspase-7(-/-) macrophages to the intracellular pathogen was due to defective delivery of the organism to the lysosome and to delayed cell death during early stages of infection. These results reveal a new mechanism for caspase-7 activation downstream of the Nlrc4 inflammasome and present a novel biological role for caspase-7 in host defense against an intracellular bacterium.
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Cites
IAP Antagonists Induce Autoubiquitination of c-IAPs, NF-κB Activation, and TNFα-Dependent Apoptosis
Varfolomeev, E., Blankenship, J. W., Wayson, S. M., Fedorova, A. V., Kayagaki, N., Garg, P., Zobel, K., Dynek, J. N., Elliott, L. O., Wallweber, H. J. A., et al. (2007) · Cell · doi:10.1016/j.cell.2007.10.030 · Cited by 1,218
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Self-citationRegulation of Legionella Phagosome Maturation and Infection through Flagellin and Host Ipaf
Amer, A., Franchi, L., Kanneganti, T.-D., Body-Malapel, M., Özören, N., Brady, G., Meshinchi, S., Jagirdar, R., Gewirtz, A., Akira, S., et al. (2006) · Journal of Biological Chemistry · doi:10.1074/jbc.m604933200 · Cited by 453
Self-citationNLRs at the intersection of cell death and immunity
Ting, J. P.-Y., Willingham, S. B., & Bergstralh, D. T. (2008) · Nature Reviews Immunology · doi:10.1038/nri2296 · Cited by 371 · cited 1×
“These cytosolic receptors belong to the nucleotide binding oligomerization domain-leucine rich repeat proteins (NOD-likereceptors or CATERPILLAR family of proteins) [7–12].”
BackgroundAutophagy is an immediate macrophage response to Legionella pneumophila
Amer, A. O., & Swanson, M. S. (2005) · Cellular Microbiology · doi:10.1111/j.1462-5822.2005.00509.x · Cited by 279
Self-citationFortin, A., Diez, E., Rochefort, D., Laroche, L., Malo, D., Rouleau, G. A., Gros, P., & Skamene, E. (2001) · Genomics · doi:10.1006/geno.2001.6528 · Cited by 116
Cited by
Cleavage of GSDMD by inflammatory caspases determines pyroptotic cell death
Shi, J., Zhao, Y., Wang, K., Shi, X., Wang, Y., Huang, H., Zhuang, Y., Cai, T., Wang, F., & Shao, F. (2015) · Nature · doi:10.1038/nature15514 · Cited by 6,659
Pyroptosis: Gasdermin-Mediated Programmed Necrotic Cell Death
Shi, J., Gao, W., & Shao, F. (2017) · Trends in Biochemical Sciences · doi:10.1016/j.tibs.2016.10.004 · Cited by 3,088
Inflammasomes and Their Roles in Health and Disease
Lamkanfi, M., & Dixit, V. M. (2012) · Annual Review of Cell and Developmental Biology · doi:10.1146/annurev-cellbio-101011-155745 · Cited by 935
Programmed cell death in the plant immune system
Coll, N. S., Epple, P., & Dangl, J. L. (2011) · Cell Death & Differentiation · doi:10.1038/cdd.2011.37 · Cited by 915
The inflammasome: an integrated view
Gross, O., Thomas, C. J., Guarda, G., & Tschopp, J. (2011) · Immunological Reviews · doi:10.1111/j.1600-065x.2011.01046.x · Cited by 778
Metadata
- Authors
- Akhter, A., Gavrilin, M. A., Frantz, L., Washington, S., Ditty, C., Limoli, D., Day, C., Sarkar, A., Newland, C., Butchar, J., Marsh, C. B., Wewers, M. D., Tridandapani, S., Kanneganti, T.-D., & Amer, A. O.
- Venue
- PLoS Pathogens
- Publisher
- Public Library of Science (PLoS)
- Published
- 2009-04-03
- Volume
- 5
- Issue
- 4
- Pages
- e1000361
- ISSN
- 1553-7366 (ISSN-L)
- 1553-7374
- OpenAlex
- W2043753343
- Cited by
- 193
- References
- 6
- FWCI
- 7.80
- Type
- journal article
- Language
- en
- Open access
- gold
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- The paper
- Akhter, A., Gavrilin, M. A., Frantz, L., Washington, S., Ditty, C., Limoli, D., Day, C., Sarkar, A., Newland, C., Butchar, J., Marsh, C. B., Wewers, M. D., Tridandapani, S., Kanneganti, T.-D., & Amer, A. O. (2009). Caspase-7 Activation by the Nlrc4/Ipaf Inflammasome Restricts Legionella pneumophila Infection. PLoS Pathogens. https://doi.org/10.1371/journal.ppat.1000361
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