Cited by 242Cell death mechanisms and regulationNF-κB Signaling PathwaysImmune Response and Inflammation

The Pseudokinase MLKL and the Kinase RIPK3 Have Distinct Roles in Autoimmune Disease Caused by Loss of Death-Receptor-Induced Apoptosis

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Alvarez-Diaz, Silvia, Dillon, Christopher P., Lalaoui, Najoua, Tanzer, Maria C., Rodriguez, Diego A., Lin, Ann, Lebois, Marion, Hakem, Razq +6 more·2016·Immunity

Abstract

The kinases RIPK1 and RIPK3 and the pseudo-kinase MLKL have been identified as key regulators of the necroptotic cell death pathway, although a role for MLKL within the whole animal has not yet been established. Here, we have shown that MLKL deficiency rescued the embryonic lethality caused by loss of Caspase-8 or FADD. Casp8(-/-)Mlkl(-/-) and Fadd(-/-)Mlkl(-/-) mice were viable and fertile but rapidly developed severe lymphadenopathy, systemic autoimmune disease, and thrombocytopenia. These morbidities occurred more rapidly and with increased severity in Casp8(-/-)Mlkl(-/-) and Fadd(-/-)Mlkl(-/-) mice compared to Casp8(-/-)Ripk3(-/-) or Fadd(-/-)Ripk3(-/-) mice, respectively. These results demonstrate that MLKL is an essential effector of aberrant necroptosis in embryos caused by loss of Caspase-8 or FADD. Furthermore, they suggest that RIPK3 and/or MLKL may exert functions independently of necroptosis. It appears that non-necroptotic functions of RIPK3 contribute to the lymphadenopathy, autoimmunity, and excess cytokine production that occur when FADD or Caspase-8-mediated apoptosis is abrogated.

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Crossref · 10.1016/j.immuni.2016.07.016

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  • Embryonic lethality imposed on mice by loss of Casp8 or Fadd can be rescued by concurrent ablation of Ripk3 or Mlkl, even though double knockout animals generally display lymphoproliferative and/or systemic autoimmune disorders as adults.

    “Thus, the embryonic lethality imposed on mice by the loss of Casp8 or Fadd can be rescued by concurrent ablation of Ripk3 or Mlkl, even though these double knockout animals generally display lymphoproliferative and/or systemic autoimmune disorders as adults [432, 466, 484, 485].”

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Authors
Alvarez-Diaz, S., Dillon, C. P., Lalaoui, N., Tanzer, M. C., Rodriguez, D. A., Lin, A., Lebois, M., Hakem, R., Josefsson, E. C., O’Reilly, L. A., Silke, J., Alexander, W. S., Green, D. R., & Strasser, A.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • The University of Melbourne (AU)
  • Walter and Eliza Hall Institute of Medical Research (AU)
Corresponding author
  • Alexander, Warren S.
  • Green, Douglas R.
  • Strasser, Andreas
Venue
Immunity
Publisher
Elsevier BV
Published
2016-09
Volume
45
Issue
3
Pages
513-526
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2515679818
Cited by
242
References
64
Citations by year
2026: 14 · 2025: 23 · 2024: 24 · 2023: 21 · 2022: 26 · 2021: 30 · 2020: 24 · 2019: 36 · 2018: 23 · 2017: 17 · 2016: 4
FWCI
13.86
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (R01CA169291)
  • National Institute of Allergy and Infectious Diseases (R01AI044828, R37AI044828)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
MLKL, RIPK3, RIPK1, necroptosis, caspase-8, FADD, autoimmune disease, lymphadenopathy, thrombocytopenia, cytokine production, embryonic lethality
MeSH terms
Animals, Autoimmune Diseases, Mice, Inbred C57BL, Necrosis, Protein Kinases, Cell Death, Apoptosis, Mice, Caspase 8, Fas-Associated Death Domain Protein, Receptor-Interacting Protein Serine-Threonine Kinases

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