Cited by 118interferon and immune responsesHerpesvirus Infections and TreatmentsNeuroinflammation and Neurodegeneration Mechanisms

Brain immune cells undergo cGAS/STING-dependent apoptosis during herpes simplex virus type 1 infection to limit type I IFN production

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Reinert, Line S., Rashidi, Ahmad S., Tran, Diana N., Katzilieris-Petras, Georgios, Hvidt, Astrid K., Gohr, Mette, Fruhwürth, Stefanie, Bodda, Chiranjeevi +13 more·2021·Journal of Clinical Investigation

Abstract

Protection of the brain from viral infections involves the type I IFN (IFN-I) system, defects in which render humans susceptible to herpes simplex encephalitis (HSE). However, excessive cerebral IFN-I levels lead to pathologies, suggesting the need for tight regulation of responses. Based on data from mouse models, human HSE cases, and primary cell culture systems, we showed that microglia and other immune cells undergo apoptosis in the HSV-1-infected brain through a mechanism dependent on the cyclic GMP-AMP synthase/stimulator of interferon genes (cGAS/STING) pathway, but independent of IFN-I. HSV-1 infection of microglia induced cGAS-dependent apoptosis at high viral doses, whereas lower viral doses led to IFN-I responses. Importantly, inhibition of caspase activity prevented microglial cell death and augmented IFN-I responses. Accordingly, HSV-1-infected organotypic brain slices or mice treated with a caspase inhibitor exhibited lower viral load and an improved infection outcome. Collectively, we identify an activation-induced apoptosis program in brain immune cells that downmodulates local immune responses.

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  1. J Clin Invest. 2021;131(1):e136824 https://doi.org/10.1172/JCI136824
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  5. supervised. LSR, PB, LA, THM, JRN, HZ, GMGMV, and SRP reviewed and edited the manuscript. LSR and SRP wrote the original manuscript. J Clin Invest. 2021;131(1):e136824 https://doi.org/10.1172/JCI136824 Biol Rev. 2015;79(2):225-241. · DOI

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Authors
Reinert, L. S., Rashidi, A. S., Tran, D. N., Katzilieris-Petras, G., Hvidt, A. K., Gohr, M., Fruhwürth, S., Bodda, C., Thomsen, M. K., Vendelbo, M. H., Khan, A. R., Hansen, B., Bergström, P., Agholme, L., Mogensen, T. H., Christensen, M. H., Nyengaard, J. R., Sen, G. C., Zetterberg, H., Verjans, G. M., & Paludan, S. R.
Affiliations
  • Aarhus University (DK)
  • Erasmus MC (NL)
  • University of Gothenburg (SE)
  • University of Bonn (DE)
  • Cleveland Clinic (US)
  • UK Dementia Research Institute (GB)
Venue
Journal of Clinical Investigation
Published
2021-01-04
Volume
131
Issue
1
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W3091305781
Cited by
118
References
65
Citations by year
2026: 17 · 2025: 20 · 2024: 24 · 2023: 21 · 2022: 22 · 2021: 14
FWCI
4.99
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (acceptedVersion, other-oa)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion, other-oa)
Funders
  • European Research Council (ERC-AdG ENVISION, 786602)
  • The Novo Nordisk Foundation (NNF18OC0030274)
  • Lundbeck Foundation (R198-2015-171, R268-2016-3927)
  • Swedish Research Council (2018-02463)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Health Sciences › Medicine › Epidemiology › Herpesvirus Infections and Treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
herpes simplex virus type 1, herpes simplex encephalitis, cGAS-STING pathway, microglia, apoptosis, type I interferon, caspase inhibition, brain immune response, viral load, innate immunity regulation
MeSH terms
STING Protein, Cyclic Guanosine Monophosphate-Adenosine Monophosphate Synthase, Animals, Brain, Herpes Simplex, Humans, Interferon Type I, Male, Membrane Proteins, Nucleotidyltransferases, Apoptosis, Microglia, Herpesvirus 1, Human, Mice, Knockout, Mice

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