cGAS-mediated induction of type I interferon due to inborn errors of histone pre-mRNA processing

Nat Genet. 2020 Dec;52(12):1364-1372. doi: 10.1038/s41588-020-00737-3. Epub 2020 Nov 23.

Abstract

Inappropriate stimulation or defective negative regulation of the type I interferon response can lead to autoinflammation. In genetically uncharacterized cases of the type I interferonopathy Aicardi-Goutières syndrome, we identified biallelic mutations in LSM11 and RNU7-1, which encode components of the replication-dependent histone pre-mRNA-processing complex. Mutations were associated with the misprocessing of canonical histone transcripts and a disturbance of linker histone stoichiometry. Additionally, we observed an altered distribution of nuclear cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) and enhanced interferon signaling mediated by the cGAS-stimulator of interferon genes (STING) pathway in patient-derived fibroblasts. Finally, we established that chromatin without linker histone stimulates cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) production in vitro more efficiently. We conclude that nuclear histones, as key constituents of chromatin, are essential in suppressing the immunogenicity of self-DNA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Autoimmune Diseases of the Nervous System / genetics
  • Autoimmune Diseases of the Nervous System / immunology
  • Cell Line
  • Chromatin / metabolism*
  • DNA / immunology
  • Gene Expression Regulation / genetics
  • Gene Expression Regulation / immunology
  • HCT116 Cells
  • HEK293 Cells
  • Hereditary Autoinflammatory Diseases / genetics
  • Hereditary Autoinflammatory Diseases / immunology
  • Histones / metabolism*
  • Humans
  • Interferon Type I / biosynthesis*
  • Membrane Proteins / metabolism
  • Nervous System Malformations / genetics
  • Nervous System Malformations / immunology
  • Nucleotides, Cyclic / biosynthesis
  • Nucleotidyltransferases / metabolism
  • RNA Precursors / metabolism*
  • RNA-Binding Proteins / genetics*
  • Ribonucleoprotein, U7 Small Nuclear / genetics*

Substances

  • Chromatin
  • Histones
  • Interferon Type I
  • Lsm11 protein, human
  • Membrane Proteins
  • Nucleotides, Cyclic
  • RNA Precursors
  • RNA-Binding Proteins
  • Ribonucleoprotein, U7 Small Nuclear
  • STING1 protein, human
  • cyclic guanosine monophosphate-adenosine monophosphate
  • DNA
  • Nucleotidyltransferases
  • cGAS protein, human

Supplementary concepts

  • Aicardi-Goutieres syndrome