John Janczy

Mechanisms for Activation and Inhibition of Inflammasomes
Biography

Regulation of Nlrp3 inflammasome activation by FcγR

The inflammasome is a multiprotein complex that serves as a platform for the activation of caspase-1. Upon activation, caspase-1 cleaves IL-1β into its biologically active and secreted form. Inflammasome activation is tightly controlled, and requires two signals for activation. Signal one involves the activation of the transcription factor NF-κB. The c-type lectin dectin-2 can activate NF-κB and is required for inflammasome activation in response to Candida albicans challenge. FcRγ is the signaling component of dectin-2 and FcγR. My project currently focuses on how FcγR signaling modulates inflammasome activation.

Ciraci C, Janczy JR, Jain N, Haasken S, Pecli E Silva C, Benjamim CF, Sadler JJ, Olivier AK, Iwakura Y, Shayakhmetov DM, Sutterwala FS, Cassel SL. Immune Complexes Indirectly Suppress the Generation of Th17 Responses In Vivo. PLoS One. 2016 Mar 15;11(3):e0151252. doi: 10.1371/journal.pone.0151252. eCollection 2016. PubMed PMID: 26978520; PubMed Central PMCID: PMC4792482.

Janczy JR, Ciraci C, Haasken S, Iwakura Y, Olivier AK, Cassel SL, Sutterwala FS. Immune complexes inhibit IL-1 secretion and inflammasome activation. J Immunol. 2014 Nov 15;193(10):5190-8. doi: 10.4049/jimmunol.1400628. Epub 2014 Oct 15. PubMed PMID: 25320279; PubMed Central PMCID: PMC4225162.

Cassel SL, Janczy JR, Bing X, Wilson SP, Olivier AK, Otero JE, Iwakura Y, Shayakhmetov DM, Bassuk AG, Abu-Amer Y, Brogden KA, Burns TL, Sutterwala FS, Ferguson PJ. Inflammasome-independent IL-1β mediates autoinflammatory disease in Pstpip2-deficient mice. Proc Natl Acad Sci U S A. 2014 Jan 21;111(3):1072-7. doi:10.1073/pnas.1318685111. Epub 2014 Jan 6. PubMed PMID: 24395802; PubMed CentralPMCID: PMC3903222.

Iyer SS, He Q, Janczy JR, Elliott EI, Zhong Z, Olivier AK, Sadler JJ, Knepper-Adrian V, Han R, Qiao L, Eisenbarth SC, Nauseef WM, Cassel SL, Sutterwala FS. Mitochondrial cardiolipin is required for Nlrp3 inflammasome activation. Immunity. 2013 Aug 22;39(2):311-23. doi: 10.1016/j.immuni.2013.08.001. Epub 2013 Aug 15. PubMed PMID: 23954133; PubMed Central PMCID: PMC3779285.

Ciraci C, Janczy JR, Sutterwala FS, Cassel SL. Control of innate and adaptive immunity by the inflammasome. Microbes Infect. 2012 Nov;14(14):1263-70. doi:10.1016/j.micinf.2012.07.007. Epub 2012 Jul 24. Review. PubMed PMID: 22841804;PubMed Central PMCID: PMC3511629.

Kuipers MT, Aslami H, Janczy JR, van der Sluijs KF, Vlaar AP, Wolthuis EK, Choi G, Roelofs JJ, Flavell RA, Sutterwala FS, Bresser P, Leemans JC, van der Poll T, Schultz MJ, Wieland CW. Ventilator-induced lung injury is mediated by the NLRP3 inflammasome. Anesthesiology. 2012 May;116(5):1104-15. doi:10.1097/ALN.0b013e3182518bc0. PubMed PMID: 22531249.

Scientist
Regeneron Pharmaceuticals
John Janczy