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Acute lipopolysaccharide priming boosts inflammasome activation independently of inflammasome sensor induction
Open accessAbstract
Macrophage pre-treatment with bacterial lipopolysaccharide (LPS) boosts subsequent activation of the NLRP3 inflammasome, which controls caspase-1-dependent pro-inflammatory cytokine maturation. Previous work has attributed this phenomenon (known as LPS 'priming') to LPS-dependent induction of NLRP3 expression. Whilst this plays a role, here we demonstrate that rapid LPS priming of NLRP3 inflammasome activation can occur independently of NLRP3 induction, since the priming effect of LPS is still apparent at short pre-treatment times in which NLRP3 protein expression remains unchanged. Furthermore, rapid LPS priming is still evident in Nlrp3(-/-) primary macrophages with NLRP3 expression reconstituted using a constitutive promoter. Similarly, we found that LPS potentiates AIM2 inflammasome activation to submaximal doses of cytosolic DNA without concomitant upregulation of AIM2 protein expression. Our data suggest that, in addition to augmenting NLRP3 inflammasome activity via NLRP3 induction, LPS boosts caspase-1 activation by the NLRP3 and AIM2 inflammasomes by an acute mechanism that is independent of inflammasome sensor induction.
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Citations
Cited by
The NLRP3 Inflammasome: an overview of mechanisms of activation and regulation
Kelley, N., Jeltema, D., Duan, Y., & He, Y. (2019) · International Journal of Molecular Sciences · doi:10.3390/ijms20133328 · Cited by 3,539
Activation and regulation of the inflammasomes
Latz, E., Xiao, T. S., & Stutz, A. (2013) · Nature Reviews Immunology · doi:10.1038/nri3452 · Cited by 2,884
Mechanism and Regulation of NLRP3 Inflammasome Activation
He, Y., Hara, H., & Núñez, G. (2016) · Trends in Biochemical Sciences · doi:10.1016/j.tibs.2016.09.002 · Cited by 2,759
Initiation and perpetuation of NLRP 3 inflammasome activation and assembly
Elliott, E. I., & Sutterwala, F. S. (2015) · Immunological Reviews · doi:10.1111/imr.12286 · Cited by 821
Mechanism of NLRP3 inflammasome activation
Sutterwala, F. S., Haasken, S., & Cassel, S. L. (2014) · Annals of the New York Academy of Sciences · doi:10.1111/nyas.12458 · Cited by 736
Metadata
- Authors
- Schroder, K., Sagulenko, V., Zamoshnikova, A., Richards, A. A., Cridland, J. A., Irvine, K. M., Stacey, K. J., & Sweet, M. J.
- Venue
- Immunobiology
- Publisher
- Elsevier BV
- Published
- 2012-12
- Volume
- 217
- Issue
- 12
- Pages
- 1325-1329
- ISSN
- 0171-2985 (ISSN-L)
- OpenAlex
- W2007845477
- Cited by
- 181
- References
- 0
- FWCI
- 5.23
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: Acute lipopolysaccharide priming boosts inflammasome activation independently of inflammasome sensor induction. https://app.cochat.ai/papers/10.1016/j.imbio.2012.07.020
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- Schroder, K., Sagulenko, V., Zamoshnikova, A., Richards, A. A., Cridland, J. A., Irvine, K. M., Stacey, K. J., & Sweet, M. J. (2012). Acute lipopolysaccharide priming boosts inflammasome activation independently of inflammasome sensor induction. Immunobiology. https://doi.org/10.1016/j.imbio.2012.07.020
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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