Cited by 337interferon and immune responsesSystemic Lupus Erythematosus ResearchNeuroinflammation and Neurodegeneration Mechanisms

Modeling of TREX1-dependent autoimmune disease using human stem cells highlights L1 accumulation as a source of neuroinflammation

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Thomas, Charles A., Tejwani, Leon, Trujillo, Cleber A., Negraes, Priscilla D., Herai, Roberto H., Mesci, Pinar, Macia, Angela, Crow, Yanick J. +1 more·2017·Cell Stem Cell

Abstract

Three-prime repair exonuclease 1 (TREX1) is an anti-viral enzyme that cleaves nucleic acids in the cytosol, preventing accumulation and a subsequent type I interferon-associated inflammatory response. Autoimmune diseases, including Aicardi-Goutières syndrome (AGS) and systemic lupus erythematosus, can arise when TREX1 function is compromised. AGS is a neuroinflammatory disorder with severe and persistent intellectual and physical problems. Here we generated a human AGS model that recapitulates disease-relevant phenotypes using pluripotent stem cells lacking TREX1. We observed abundant extrachromosomal DNA in TREX1-deficient neural cells, of which endogenous Long Interspersed Element-1 retrotransposons were a major source. TREX1-deficient neurons also exhibited increased apoptosis and formed three-dimensional cortical organoids of reduced size. TREX1-deficient astrocytes further contributed to the observed neurotoxicity through increased type I interferon secretion. In this model, reverse-transcriptase inhibitors rescued the neurotoxicity of AGS neurons and organoids, highlighting their potential utility in therapeutic regimens for AGS and related disorders.

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Crossref · 10.1016/j.stem.2017.07.009

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  • Retrotransposition is greatly diminished in non-dividing cells, although low levels could be detected in senescent cells or neurons.

    “Retrotransposition is greatly diminished in non-dividing cells94, although low levels could be detected in senescent cells33 or neurons92, and it is possible that abortive products of these processes could accumulate.”

    From The role of retrotransposable elements in ageing and age-associated diseases (2021) · cites this paper as [92]

    The Results section on L1 species in neural cells reports L1 activity in post-mitotic neurons, supporting the possibility of activity in non-dividing neurons. But this paper measures de novo retrotransposition in neural progenitor cells, not neurons, and does not establish that neuronal retrotransposition occurs at low levels. The separate claims about diminished activity in non-dividing cells and senescent cells are attached to other citations. (LLM, conf=0.79)

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  • Treatment with NRTIs that inhibit L1 reverse transcriptase, or knockdown of L1 expression with shRNAs against active L1 families, decreased cytoplasmic L1 DNAs and ameliorated cGAS and IFN-I activation.

    “Importantly, treatment with nucleoside reverse transcriptase inhibitor (NRTI) drugs that inhibit L1 reverse transcriptase, or a knockdown of L1 expression with shRNAs against active L1 families, decreased cytoplasmic L1 DNAs and ameliorated cGAS and IFN-I activation33, 34, 92.”

    From The role of retrotransposable elements in ageing and age-associated diseases (2021) · cites this paper as [92]

    The Results sections report that 3TC and d4T reduced extranuclear ssDNA and type-I IFN expression in TREX1-deficient neural cells; they also report reduced IRF3 activation, which the authors interpret as evidence of cGAS/STING involvement. L1 shRNA reduced ssDNA in TREX1-deficient NPCs, but the paper does not report that shRNA reduced cGAS or IFN-I activation. The claim also states cGAS activation more definitively than the Results passage does. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Cell lines were routinely tested for mycoplasma contamination by PCR and positive samples were discarded.

    “Cells were routinely tested for mycoplasma contamination by PCR as previously described (58) using primers for-GGCGAATGGGTGAGTAACACG and rev-CGGATAACGCTTGCGACCTATG. Any mycoplasma-positive samples were immediately discarded.”
  • Brain organoid models have recapitulated cell proliferation effects in microcephaly and have been used to study neural migration defects in Timothy syndrome.

    “Brain organoid models have been shown to recapitulate cell proliferation effects in microcephaly (Thomas et al., 2017) and have been used to study neural migration defects in Timothy syndrome, a rare ASD form caused by mutations in the Cav1.2 calcium channel gene (Birey et al., 2017).”

    From Getting to the cores of autism (2019) · cites this paper as Thomas et al., 2017

  • L1 cDNA has been found in the cytosol in certain conditions, such as autoimmunity.

    “Although TPRT occurs in the nucleus, L1 cDNA has also been found in the cytosol in certain conditions, such as autoimmunity (Stetson et al., 2008; Thomas et al., 2017), and others which will be discussed in more detail below.”

    From Cytoplasmic DNA: sources, sensing, and role in aging and disease (2021) · cites this paper as Thomas et al., 2017

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Authors
Thomas, C. A., Tejwani, L., Trujillo, C. A., Negraes, P. D., Herai, R. H., Mesci, P., Macia, A., Crow, Y. J., & Muotri, A. R.
Affiliations
  • University of California San Diego (US)
  • Yale University (US)
  • Pontifícia Universidade Católica do Paraná (BR)
  • Hôpital Necker-Enfants Malades (FR)
Corresponding author
Muotri, Alysson R.
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2017-09
Volume
21
Issue
3
Pages
319-331.e8
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W2745112353
Cited by
330
References
72
Citations by year
2026: 19 · 2025: 40 · 2024: 30 · 2023: 35 · 2022: 49 · 2021: 43 · 2020: 53 · 2019: 35 · 2018: 21 · 2017: 5
FWCI
14.08
Type
journal article
Language
en
Open access
Locations
  • Cell stem cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Research Explorer (The University of Manchester) (submittedVersion)
Funders
  • NIH (R01MH108528, R01MH094753, R01MH109885, R01MH100175, R21MH107771, R56MH109587, U19MH107367)
  • Ruth L. Kirschstein NRSA Fellowship (1F31NS076198)
  • California Institute for Regenerative Medicine (CIRM) (DISC1-08825)
  • UCSD CTRI
  • NARSAD
  • European Research Council (GA 309449)
  • ERA-NET Neuron (MR/M501803/1)
  • National Research Agency (ANR-10-IAHU-01)
  • Roche Postdoc Fellowship Program
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
TREX1, Aicardi-Goutières syndrome, systemic lupus erythematosus, extrachromosomal DNA, neuroinflammation, type I interferon, cortical organoids, neuronal apoptosis, astrocytes, reverse transcriptase inhibitors, autoinflammatory disease
MeSH terms
Astrocytes, Autoimmune Diseases, Base Sequence, Cell Extracts, Child, Cytosol, DNA, Exodeoxyribonucleases, Humans, Infant, Infant, Newborn, Inflammation, Interferons, Male, Microcephaly, Nervous System, Neurons, Organoids, Phenotype, Phosphoproteins, Stem Cells, Up-Regulation, Long Interspersed Nucleotide Elements, Neural Stem Cells

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