Cited by 234Immune Response and InflammationNeuroinflammation and Neurodegeneration MechanismsCell death mechanisms and regulation

MyD88-5 links mitochondria, microtubules, and JNK3 in neurons and regulates neuronal survival

Open access

Abstract

The innate immune system relies on evolutionally conserved Toll-like receptors (TLRs) to recognize diverse microbial molecular structures. Most TLRs depend on a family of adaptor proteins termed MyD88s to transduce their signals. Critical roles of MyD88-1–4 in host defense were demonstrated by defective immune responses in knockout mice. In contrast, the sites of expression and functions of vertebrate MyD88-5 have remained elusive. We show that MyD88-5 is distinct from other MyD88s in that MyD88-5 is preferentially expressed in neurons, colocalizes in part with mitochondria and JNK3, and regulates neuronal death. We prepared MyD88-5/GFP transgenic mice via a bacterial artificial chromosome to preserve its endogenous expression pattern. MyD88-5/GFP was detected chiefly in the brain, where it associated with punctate structures within neurons and copurified in part with mitochondria. In vitro, MyD88-5 coimmunoprecipitated with JNK3 and recruited JNK3 from cytosol to mitochondria. Hippocampal neurons from MyD88-5–deficient mice were protected from death after deprivation of oxygen and glucose. In contrast, MyD88-5–null macrophages behaved like wild-type cells in their response to microbial products. Thus, MyD88-5 appears unique among MyD88s in functioning to mediate stress-induced neuronal toxicity.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1084/jem.20070868

Cites

3 of 3 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 68

  1. [2]Xu, Y., X. Tao, B. Shen, T. Horng, R. Medzhitov, J.L. Manley, and L. Tong. 2000. Structural basis for signal transduction by the Toll/interleukin-1 receptor domains. Nature. 408: 111–115. 11081518
  2. [3]Fitzgerald, K.A., E.M. Palsson-McDermott, A.G. Bowie, C.A. Jefferies, A.S. Mansell, G. Brady, E. Brint, A. Dunne, P. Gray, M.T. Harte, et al. 2001. Mal (MyD88-adapter-like) is required for Toll-like receptor-4 signal transduction. Nature. 413: 78–83. 11544529
  3. [4]Horng, T., G.M. Barton, and R. Medzhitov. 2001. TIRAP: an adapter molecule in the Toll signaling pathway. Nat. Immunol. 2: 835–841. 11526399
  4. [5]Yamamoto, M., S. Sato, H. Hemmi, H. Sanjo, S. Uematsu, T. Kaisho, K. Hoshino, O. Takeuchi, M. Kobayashi, T. Fujita, et al. 2002. Essential role for TIRAP in activation of the signalling cascade shared by TLR2 and TLR4. Nature. 420: 324–329. 12447441
  5. [6]Hoebe, K., X. Du, P. Georgel, E. Janssen, K. Tabeta, S.O. Kim, J. Goode, P. Lin, N. Mann, S. Mudd, et al. 2003. Identification of Lps2 as a key transducer of MyD88-independent TIR signalling. Nature. 424: 743–748. 12872135
  6. [7]Oshiumi, H., M. Matsumoto, K. Funami, T. Akazawa, and T. Seya. 2003. TICAM-1, an adaptor molecule that participates in Toll-like receptor 3-mediated interferon-beta induction. Nat. Immunol. 4: 161–167. 12539043
  7. [8]Yamamoto, M., S. Sato, H. Hemmi, K. Hoshino, T. Kaisho, H. Sanjo, O. Takeuchi, M. Sugiyama, M. Okabe, K. Takeda, and S. Akira. 2003. Role of adaptor TRIF in the MyD88-independent toll-like receptor signaling pathway. Science. 301: 640–643. 12855817
  8. [9]Bin, L.H., L.G. Xu, and H.B. Shu. 2003. TIRP, a novel Toll/interleukin-1 receptor (TIR) domain-containing adapter protein involved in TIR signaling. J. Biol. Chem. 278: 24526–24532. 12721283
  9. [10]Fitzgerald, K.A., D.C. Rowe, B.J. Barnes, D.R. Caffrey, A. Visintin, E. Latz, B. Monks, P.M. Pitha, and D.T. Golenbock. 2003. LPS-TLR4 signaling to IRF-3/7 and NF-κB involves the toll adapters TRAM and TRIF. J. Exp. Med. 198: 1043–1055. 14517278 PMC2194210
  10. [11]Yamamoto, M., S. Sato, H. Hemmi, S. Uematsu, K. Hoshino, T. Kaisho, O. Takeuchi, K. Takeda, and S. Akira. 2003. TRAM is specifically involved in the Toll-like receptor 4-mediated MyD88-independent signaling pathway. Nat. Immunol. 4: 1144–1150. 14556004
  11. [12]Mink, M., B. Fogelgren, K. Olszewski, P. Maroy, and K. Csiszar. 2001. A novel human gene (SARM) at chromosome 17q11 encodes a protein with a SAM motif and structural similarity to Armadillo/beta-catenin that is conserved in mouse, Drosophila, and Caenorhabditis elegans. Genomics. 74: 234–244. 11386760
  12. [13]Andrade, M.A., C. Perez-Iratxeta, and C.P. Ponting. 2001. Protein repeats: structures, functions, and evolution. J. Struct. Biol. 134: 117–131. 11551174
  13. [14]Aviv, T., Z. Lin, G. Ben-Ari, C.A. Smibert, and F. Sicheri. 2006. Sequence-specific recognition of RNA hairpins by the SAM domain of Vts1p. Nat. Struct. Mol. Biol. 13: 168–176. 16429151
  14. [15]Coates, J.C. 2003. Armadillo repeat proteins: beyond the animal kingdom. Trends Cell Biol. 13: 463–471. 12946625
  15. [16]Couillault, C., N. Pujol, J. Reboul, L. Sabatier, J.F. Guichou, Y. Kohara, and J.J. Ewbank. 2004. TLR-independent control of innate immunity in Caenorhabditis elegans by the TIR domain adaptor protein TIR-1, an ortholog of human SARM. Nat. Immunol. 5: 488–494. 15048112
  16. [17]Liberati, N.T., K.A. Fitzgerald, D.H. Kim, R. Feinbaum, D.T. Golenbock, and F.M. Ausubel. 2004. Requirement for a conserved Toll/interleukin-1 resistance domain protein in the Caenorhabditis elegans immune response. Proc. Natl. Acad. Sci. USA. 101: 6593–6598. 15123841 PMC404090
  17. [18]Chuang, C.F., and C.I. Bargmann. 2005. A Toll-interleukin 1 repeat protein at the synapse specifies asymmetric odorant receptor expression via ASK1 MAPKKK signaling. Genes Dev. 19: 270–281. 15625192 PMC545892
  18. [19]Chang, S., R.J. Johnston Jr., and O. Hobert. 2003. A transcriptional regulatory cascade that controls left/right asymmetry in chemosensory neurons of C. elegans. Genes Dev. 17: 2123–2137. 12952888 PMC196454
  19. [20]Troemel, E.R., A. Sagasti, and C.I. Bargmann. 1999. Lateral signaling mediated by axon contact and calcium entry regulates asymmetric odorant receptor expression in C. elegans. Cell. 99: 387–398. 10571181
  20. [21]Wes, P.D., and C.I. Bargmann. 2001. C. elegans odour discrimination requires asymmetric diversity in olfactory neurons. Nature. 410: 698–701. 11287957
  21. [22]Sagasti, A., N. Hisamoto, J. Hyodo, M. Tanaka-Hino, K. Matsumoto, and C.I. Bargmann. 2001. The CaMKII UNC-43 activates the MAPKKK NSY-1 to execute a lateral signaling decision required for asymmetric olfactory neuron fates. Cell. 105: 221–232. 11336672
  22. [23]Kawai, T., O. Adachi, T. Ogawa, K. Takeda, and S. Akira. 1999. Unresponsiveness of MyD88-deficient mice to endotoxin. Immunity. 11: 115–122. 10435584
  23. [24]Horng, T., G.M. Barton, R.A. Flavell, and R. Medzhitov. 2002. The adaptor molecule TIRAP provides signalling specificity for Toll-like receptors. Nature. 420: 329–333. 12447442
  24. [25]Kaiser, W.J., and M.K. Offermann. 2005. Apoptosis induced by the toll-like receptor adaptor TRIF is dependent on its receptor interacting protein homotypic interaction motif. J. Immunol. 174: 4942–4952. 15814722
  25. [26]Carty, M., R. Goodbody, M. Schroder, J. Stack, P.N. Moynagh, and A.G. Bowie. 2006. The human adaptor SARM negatively regulates adaptor protein TRIF-dependent Toll-like receptor signaling. Nat. Immunol. 7: 1074–1081. 16964262
  26. [27]Bonnert, T.P., K.E. Garka, P. Parnet, G. Sonoda, J.R. Testa, and J.E. Sims. 1997. The cloning and characterization of human MyD88: a member of an IL-1 receptor related family. FEBS Lett. 402: 81–84. 9013863
  27. [28]Hardiman, G., N.A. Jenkins, N.G. Copeland, D.J. Gilbert, D.K. Garcia, S.L. Naylor, R.A. Kastelein, and J.F. Bazan. 1997. Genetic structure and chromosomal mapping of MyD88. Genomics. 45: 332–339. 9344657
  28. [29]Lord, K.A., B. Hoffman-Liebermann, and D.A. Liebermann. 1990. Nucleotide sequence and expression of a cDNA encoding MyD88, a novel myeloid differentiation primary response gene induced by IL6. Oncogene. 5: 1095–1097. 2374694
  29. [30]Seki, E., H. Tsutsui, H. Nakano, N. Tsuji, K. Hoshino, O. Adachi, K. Adachi, S. Futatsugi, K. Kuida, O. Takeuchi, et al. 2001. Lipopolysaccharide-induced IL-18 secretion from murine Kupffer cells independently of myeloid differentiation factor 88 that is critically involved in induction of production of IL-12 and IL-1beta. J. Immunol. 166: 2651–2657. 11160328
  30. [31]Raha, D., Q.D. Nguyen, and A. Garen. 1990. Molecular and developmental analyses of the protein encoded by the Drosophila gene ectodermal. Dev. Genet. 11: 310–317. 2090376
  31. [32]Mody, M., Y. Cao, Z. Cui, K.Y. Tay, A. Shyong, E. Shimizu, K. Pham, P. Schultz, D. Welsh, and J.Z. Tsien. 2001. Genome-wide gene expression profiles of the developing mouse hippocampus. Proc. Natl. Acad. Sci. USA. 98: 8862–8867. 11438693 PMC37526
  32. [34]Wanka, F., and E.J. Van Zoelen. 2003. Cellular organelle transport and positioning by plasma streaming. Cell. Mol. Biol. Lett. 8: 1035–1045. 14668926
  33. [35]Costanzo, M.C., J.D. Hogan, M.E. Cusick, B.P. Davis, A.M. Fancher, P.E. Hodges, P. Kondu, C. Lengieza, J.E. Lew-Smith, C. Lingner, et al. 2000. The yeast proteome database (YPD) and Caenorhabditis elegans proteome database (WormPD): comprehensive resources for the organization and comparison of model organism protein information. Nucleic Acids Res. 28: 73–76. 10592185 PMC102421
  34. [36]Li, S., C.M. Armstrong, N. Bertin, H. Ge, S. Milstein, M. Boxem, P.O. Vidalain, J.D. Han, A. Chesneau, T. Hao, et al. 2004. A map of the interactome network of the metazoan C. elegans. Science. 303: 540–543. 14704431 PMC1698949
  35. [37]Kharbanda, S., S. Saxena, K. Yoshida, P. Pandey, M. Kaneki, Q. Wang, K. Cheng, Y.N. Chen, A. Campbell, T. Sudha, et al. 2000. Translocation of SAPK/JNK to mitochondria and interaction with Bcl-x(L) in response to DNA damage. J. Biol. Chem. 275: 322–327. 10617621
  36. [38]Bowman, A.B., A. Kamal, B.W. Ritchings, A.V. Philp, M. McGrail, J.G. Gindhart, and L.S. Goldstein. 2000. Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein. Cell. 103: 583–594. 11106729
  37. [39]Verhey, K.J., D. Meyer, R. Deehan, J. Blenis, B.J. Schnapp, T.A. Rapoport, and B. Margolis. 2001. Cargo of kinesin identified as JIP scaffolding proteins and associated signaling molecules. J. Cell Biol. 152: 959–970. 11238452 PMC2198804
  38. [40]Carboni, S., B. Antonsson, P. Gaillard, J.P. Gotteland, J.Y. Gillon, and P.A. Vitte. 2005. Control of death receptor and mitochondrial-dependent apoptosis by c-Jun N-terminal kinase in hippocampal CA1 neurones following global transient ischaemia. J. Neurochem. 92: 1054–1060. 15715656
  39. [41]Dluzniewska, J., M. Beresewicz, U. Wojewodzka, B. Gajkowska, and B. Zablocka. 2005. Transient cerebral ischemia induces delayed proapoptotic Bad translocation to mitochondria in CA1 sector of hippocampus. Brain Res. Mol. Brain Res. 133: 274–280. 15710244
  40. [42]Harding, T.C., L. Xue, A. Bienemann, D. Haywood, M. Dickens, A.M. Tolkovsky, and J.B. Uney. 2001. Inhibition of JNK by overexpression of the JNL binding domain of JIP-1 prevents apoptosis in sympathetic neurons. J. Biol. Chem. 276: 4531–4534. 11121395
  41. [43]Kuan, C.Y., A.J. Whitmarsh, D.D. Yang, G. Liao, A.J. Schloemer, C. Dong, J. Bao, K.J. Banasiak, G.G. Haddad, R.A. Flavell, et al. 2003. A critical role of neural-specific JNK3 for ischemic apoptosis. Proc. Natl. Acad. Sci. USA. 100: 15184–15189. 14657393 PMC299947
  42. [44]Okuno, S., A. Saito, T. Hayashi, and P.H. Chan. 2004. The c-Jun N-terminal protein kinase signaling pathway mediates Bax activation and subsequent neuronal apoptosis through interaction with Bim after transient focal cerebral ischemia. J. Neurosci. 24: 7879–7887. 15356200 PMC6729938
  43. [45]Resnick, L., and M. Fennell. 2004. Targeting JNK3 for the treatment of neurodegenerative disorders. Drug Discov. Today. 9: 932–939. 15501728
  44. [46]Yang, D.D., C.Y. Kuan, A.J. Whitmarsh, M. Rincon, T.S. Zheng, R.J. Davis, P. Rakic, and R.A. Flavell. 1997. Absence of excitotoxicity-induced apoptosis in the hippocampus of mice lacking the Jnk3 gene. Nature. 389: 865–870. 9349820
  45. [47]Kawano, T., J. Anrather, P. Zhou, L. Park, G. Wang, K.A. Frys, A. Kunz, S. Cho, M. Orio, and C. Iadecola. 2006. Prostaglandin E2 EP1 receptors: downstream effectors of COX-2 neurotoxicity. Nat. Med. 12: 225–229. 16432513
  46. [48]Chan, D.C. 2006. Mitochondria: dynamic organelles in disease, aging, and development. Cell. 125: 1241–1252. 16814712
  47. [50]De Vos, K., F. Severin, F. Van Herreweghe, K. Vancompernolle, V. Goossens, A. Hyman, and J. Grooten. 2000. Tumor necrosis factor induces hyperphosphorylation of kinesin light chain and inhibits kinesin-mediated transport of mitochondria. J. Cell Biol. 149: 1207–1214. 10851018 PMC2175118
  48. [51]Breckenridge, D.G., M. Stojanovic, R.C. Marcellus, and G.C. Shore. 2003. Caspase cleavage product of BAP31 induces mitochondrial fission through endoplasmic reticulum calcium signals, enhancing cytochrome c release to the cytosol. J. Cell Biol. 160: 1115–1127. 12668660 PMC2172754
  49. [52]Ebneth, A., R. Godemann, K. Stamer, S. Illenberger, B. Trinczek, and E. Mandelkow. 1998. Overexpression of tau protein inhibits kinesin-dependent trafficking of vesicles, mitochondria, and endoplasmic reticulum: implications for Alzheimer's disease. J. Cell Biol. 143: 777–794. 9813097 PMC2148132
  50. [53]Jagasia, R., P. Grote, B. Westermann, and B. Conradt. 2005. DRP-1-mediated mitochondrial fragmentation during EGL-1-induced cell death in C. elegans. Nature. 433: 754–760. 15716954
  51. [54]Karbowski, M., and R.J. Youle. 2003. Dynamics of mitochondrial morphology in healthy cells and during apoptosis. Cell Death Differ. 10: 870–880. 12867994
  52. [55]Matarrese, P., A. Tinari, E. Mormone, G.A. Bianco, M.A. Toscano, B. Ascione, G.A. Rabinovich, and W. Malorni. 2005. Galectin-1 sensitizes resting human T lymphocytes to Fas (CD95)-mediated cell death via mitochondrial hyperpolarization, budding, and fission. J. Biol. Chem. 280: 6969–6985. 15556941
  53. [56]Santel, A., S. Frank, B. Gaume, M. Herrler, R.J. Youle, and M.T. Fuller. 2003. Mitofusin-1 protein is a generally expressed mediator of mitochondrial fusion in mammalian cells. J. Cell Sci. 116: 2763–2774. 12759376
  54. [57]Sugioka, R., S. Shimizu, and Y. Tsujimoto. 2004. Fzo1, a protein involved in mitochondrial fusion, inhibits apoptosis. J. Biol. Chem. 279: 52726–52734. 15459195
  55. [58]Kyriakis, J.M., and J. Avruch. 2001. Mammalian mitogen-activated protein kinase signal transduction pathways activated by stress and inflammation. Physiol. Rev. 81: 807–869. 11274345
  56. [59]Ito, Y., N.C. Mishra, K. Yoshida, S. Kharbanda, S. Saxena, and D. Kufe. 2001. Mitochondrial targeting of JNK/SAPK in the phorbol ester response of myeloid leukemia cells. Cell Death Differ. 8: 794–800. 11526432
  57. [60]Yamamoto, K., H. Ichijo, and S.J. Korsmeyer. 1999. BCL-2 is phosphorylated and inactivated by an ASK1/Jun N-terminal protein kinase pathway normally activated at G(2)/M. Mol. Cell. Biol. 19: 8469–8478. 10567572 PMC84954
  58. [61]Bhakar, A.L., J.L. Howell, C.E. Paul, A.H. Salehi, E.B. Becker, F. Said, A. Bonni, and P.A. Barker. 2003. Apoptosis induced by p75NTR overexpression requires Jun kinase-dependent phosphorylation of Bad. J. Neurosci. 23: 11373–11381. 14673001 PMC6740508
  59. [62]Tsuruta, F., J. Sunayama, Y. Mori, S. Hattori, S. Shimizu, Y. Tsujimoto, K. Yoshioka, N. Masuyama, and Y. Gotoh. 2004. JNK promotes Bax translocation to mitochondria through phosphorylation of 14-3-3 proteins. EMBO J. 23: 1889–1899. 15071501 PMC394248
  60. [63]Mohit, A.A., J.H. Martin, and C.A. Miller. 1995. p493F12 kinase: a novel MAP kinase expressed in a subset of neurons in the human nervous system. Neuron. 14: 67–78. 7826642
  61. [64]Bingham, J., and S. Sudarsanam. 2000. Visualizing large hierarchical clusters in hyperbolic space. Bioinformatics. 16: 660–661. 11038340
  62. [65]Shi, S., C. Nathan, D. Schnappinger, J. Drenkow, M. Fuortes, E. Block, A. Ding, T.R. Gingeras, G. Schoolnik, S. Akira, et al. 2003. MyD88 primes macrophages for full-scale activation by interferon-γ yet mediates few responses to Mycobacterium tuberculosis. J. Exp. Med. 198: 987–997. 14517275 PMC2194223
  63. [66]Gong, S., X.W. Yang, C. Li, and N. Heintz. 2002. Highly efficient modification of bacterial artificial chromosomes (BACs) using novel shuttle vectors containing the R6Kgamma origin of replication. Genome Res. 12: 1992–1998. 12466304 PMC187570
  64. [67]Hanks, M., W. Wurst, L. Anson-Cartwright, A.B. Auerbach, and A.L. Joyner. 1995. Rescue of the En-1 mutant phenotype by replacement of En-1 with En-2. Science. 269: 679–682. 7624797
  65. [68]Yagi, T., Y. Ikawa, K. Yoshida, Y. Shigetani, N. Takeda, I. Mabuchi, T. Yamamoto, and S. Aizawa. 1990. Homologous recombination at c-fyn locus of mouse embryonic stem cells with use of diphtheria toxin A-fragment gene in negative selection. Proc. Natl. Acad. Sci. USA. 87: 9918–9922. 2263643 PMC55285
  66. [69]Retamal, C.A., P. Thiebaut, and E.W. Alves. 1999. Protein purification from polyacrylamide gels by sonication extraction. Anal. Biochem. 268: 15–20. 10036156
  67. [70]Kang, D., J. Nishida, A. Iyama, Y. Nakabeppu, M. Furuichi, T. Fujiwara, M. Sekiguchi, and K. Takeshige. 1995. Intracellular localization of 8-oxo-dGTPase in human cells, with special reference to the role of the enzyme in mitochondria. J. Biol. Chem. 270: 14659–14665. 7782328
  68. [71]Vallee, R.B. 1982. A taxol-dependent procedure for the isolation of microtubules and microtubule-associated proteins (MAPs). J. Cell Biol. 92: 435–442. 6120944 PMC2112074

Cited by

Sorted by citations

Authors
Kim, Y., Zhou, P., Qian, L., Chuang, J.-Z., Lee, J., Li, C., Iadecola, C., Nathan, C., & Ding, A.
Affiliations
  • Cornell University (US)
  • 2Division of Neurobiology, Department of Neurology and Neuroscience,
  • 1Department of Microbiology and Immunology
Venue
The Journal of Experimental Medicine
Published
2007-08-27
Volume
204
Issue
9
Pages
2063-2074
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2109130014
Cited by
234
References
3
Citations by year
2026: 7 · 2025: 15 · 2024: 12 · 2023: 19 · 2022: 19 · 2021: 18 · 2020: 11 · 2019: 16 · 2018: 8 · 2017: 6 · 2016: 11 · 2015: 11 · 2014: 16 · 2013: 12 · 2012: 11
FWCI
3.72
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (R01GM061710, GM61710)
  • National Institute of Allergy and Infectious Diseases (AI 30165, R01AI030165)
  • National Institute of Neurological Disorders and Stroke (R01NS034179, R01NS035806, NS34179, NS-35806, R37NS034179)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
Toll-like receptors, JNK3, mitochondria, microtubules, neuronal survival, neuronal cell death, oxygen-glucose deprivation, hippocampal neurons, macrophages, innate immunity
MeSH terms
Animals, Cell Compartmentation, Cell Survival, Glucose, Hippocampus, Mice, Inbred C57BL, Microtubules, Mitochondria, Neurons, Oxygen, Protein Binding, Cell Death, Conserved Sequence, Mice, Knockout, Evolution, Molecular, Protein Transport, Myeloid Cells, Mitogen-Activated Protein Kinase 10, Mice, Myeloid Differentiation Factor 88

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review