Cited by 123Cell death mechanisms and regulationT-cell and B-cell ImmunologyNF-κB Signaling Pathways

Complementary roles of Fas-associated death domain (FADD) and receptor interacting protein kinase-3 (RIPK3) in T-cell homeostasis and antiviral immunity

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Lu, Jennifer V., Weist, Brian M., van Raam, Bram J., Marro, Brett S., Nguyen, Long V., Srinivas, Prathna, Bell, Bryan D., Luhrs, Keith A. +3 more·2011·Proceedings of the National Academy of Sciences

Abstract

Caspase-8 (casp8) is required for extrinsic apoptosis, and mice deficient in casp8 fail to develop and die in utero while ultimately failing to maintain the proliferation of T cells, B cells, and a host of other cell types. Paradoxically, these failures are not caused by a defect in apoptosis, but by a presumed proliferative function of this protease. Indeed, following mitogenic stimulation, T cells lacking casp8 or its adaptor protein FADD (Fas-associated death domain protein) develop a hyperautophagic morphology, and die a programmed necrosis-like death process termed necroptosis. Recent studies have demonstrated that receptor-interacting protein kinases (RIPKs) RIPK1 and RIPK3 together facilitate TNF-induced necroptosis, but the precise role of RIPKs in the demise of T cells lacking FADD or casp8 activity is unknown. Here we demonstrate that RIPK3 and FADD have opposing and complementary roles in promoting T-cell clonal expansion and homeostasis. We show that the defective proliferation of T cells bearing an interfering form of FADD (FADDdd) is rescued by crossing with RIPK3 −/− mice, although such rescue ultimately leads to lymphadenopathy. Enhanced recovery of these double-mutant T cells following stimulation demonstrates that FADD, casp8, and RIPK3 are all essential for clonal expansion, contraction, and antiviral responses. Finally, we demonstrate that caspase-mediated cleavage of RIPK1-containing necrosis inducing complexes (necrosomes) is sufficient to prevent necroptosis in the face of death receptor signaling. These studies highlight the “two-faced” nature of casp8 activity, promoting clonal expansion in some situations and apoptotic demise in others.

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Crossref · 10.1073/pnas.1102779108

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Authors
Lu, J. V., Weist, B. M., van Raam, B. J., Marro, B. S., Nguyen, L. V., Srinivas, P., Bell, B. D., Luhrs, K. A., Lane, T. E., Salvesen, G. S., & Walsh, C. M.
Affiliations
  • University of California, Irvine (US)
  • Sanford–Burnham Medical Research Institute, La Jolla, CA 92037
  • Sanford Burnham Prebys Medical Discovery Institute (US)
Venue
Proceedings of the National Academy of Sciences
Published
2011-08-29
Volume
108
Issue
37
Pages
15312-15317
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2089868528
Cited by
122
References
40
Citations by year
2026: 1 · 2025: 2 · 2024: 6 · 2023: 4 · 2022: 4 · 2021: 4 · 2020: 10 · 2019: 10 · 2018: 6 · 2017: 5 · 2016: 13 · 2015: 17 · 2014: 14 · 2013: 10 · 2012: 11
FWCI
5.07
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Cancer Institute (CA 69381, P01CA069381, P30CA062203, T32CA009054)
  • National Institute of Allergy and Infectious Diseases (R01AI063419, AI50506, R01AI050506, AI63419)
  • National Institute of Neurological Disorders and Stroke (NS41249, R01NS041249)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
Keywords
FADD, RIPK3, caspase-8, T cell homeostasis, T cell clonal expansion, necroptosis, necrosome, RIPK1, antiviral immunity, death receptor signaling, apoptosis, lymphadenopathy, T cell proliferation
MeSH terms
Animals, Cell Survival, Crosses, Genetic, Female, Murine hepatitis virus, Hepatitis, Viral, Animal, Homeostasis, Immunity, Male, CD8-Positive T-Lymphocytes, Cell Proliferation, Mice, Fas-Associated Death Domain Protein, Receptor-Interacting Protein Serine-Threonine Kinases

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