Cited by 61Mitochondrial Function and PathologySARS-CoV-2 and COVID-19 ResearchCell death mechanisms and regulation

NSP4 and ORF9b of SARS-CoV-2 Induce Pro-Inflammatory Mitochondrial DNA Release in Inner Membrane-Derived Vesicles

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Faizan, Md Imam, Chaudhuri, Rituparna, Sagar, Shakti, Albogami, Sarah, Chaudhary, Nisha, Azmi, Iqbal, Akhtar, Areej, Ali, Syed Mansoor +7 more·2022·Cells

Abstract

Circulating cell-free mitochondrial DNA (cf-mtDNA) has been found in the plasma of severely ill COVID-19 patients and is now known as a strong predictor of mortality. However, the underlying mechanism of mtDNA release is unexplored. Here, we show a novel mechanism of SARS-CoV-2-mediated pro-inflammatory/pro-apoptotic mtDNA release and a rational therapeutic stem cell-based approach to mitigate these effects. We systematically screened the effects of 29 SARS-CoV-2 proteins on mitochondrial damage and cell death and found that NSP4 and ORF9b caused extensive mitochondrial structural changes, outer membrane macropore formation, and the release of inner membrane vesicles loaded with mtDNA. The macropore-forming ability of NSP4 was mediated through its interaction with BCL2 antagonist/killer (BAK), whereas ORF9b was found to inhibit the anti-apoptotic member of the BCL2 family protein myeloid cell leukemia-1 (MCL1) and induce inner membrane vesicle formation containing mtDNA. Knockdown of BAK and/or overexpression of MCL1 significantly reversed SARS-CoV-2-mediated mitochondrial damage. Therapeutically, we engineered human mesenchymal stem cells (MSCs) with a simultaneous knockdown of BAK and overexpression of MCL1 (MSCshBAK+MCL1) and named these cells IMAT-MSCs (intercellular mitochondrial transfer-assisted therapeutic MSCs). Upon co-culture with SARS-CoV-2-infected or NSP4/ORF9b-transduced airway epithelial cells, IMAT-MSCs displayed functional intercellular mitochondrial transfer (IMT) via tunneling nanotubes (TNTs). The mitochondrial donation by IMAT-MSCs attenuated the pro-inflammatory and pro-apoptotic mtDNA release from co-cultured epithelial cells. Our findings thus provide a new mechanistic basis for SARS-CoV-2-induced cell death and a novel therapeutic approach to engineering MSCs for the treatment of COVID-19.

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  • SARS-CoV-2 RNA has been detected in EVs.

    “This is also true for SARS-CoV-2 RNA, which has been detected in EVs.”

    From COVID-19, Myocarditis and Pericarditis (2023) · cites this paper as [50]

    The Discussion reports SARS-CoV-2 RNA associated with mitochondrial proteins, while its vesicle passage describes packaging of mitochondrial DNA, not viral RNA. Searches for SARS-CoV-2 RNA in extracellular vesicles and for RNA in vesicles found no passage in our copy reporting the claimed detection; the indexed passages have no page numbers. (LLM, conf=0.75)

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Authors
Faizan, M. I., Chaudhuri, R., Sagar, S., Albogami, S., Chaudhary, N., Azmi, I., Akhtar, A., Ali, S. M., Kumar, R., Iqbal, J., Joshi, M. C., Kharya, G., Seth, P., Roy, S. S., & Ahmad, T.
Affiliations
  • Jamia Millia Islamia (IN)
  • National Brain Research Centre (IN)
  • Institute of Genomics and Integrative Biology (IN)
  • Taif University (SA)
  • Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
  • Safdarjang Hospital (IN)
  • Indraprastha Apollo Hospitals (IN)
Corresponding author
Ahmad, Tanveer
Venue
Cells
Publisher
MDPI AG
Published
2022-09-23
Volume
11
Issue
19
Pages
2969
ISSN
2073-4409 (ISSN-L)
OpenAlex
W4297150190
Cited by
61
References
75
Citations by year
2026: 13 · 2025: 15 · 2024: 17 · 2023: 15 · 2022: 1
FWCI
3.92
Type
journal article
Language
en
Open access
Locations
  • Cells (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Science and Engineering Research Board (CRG/2020/002294, GIA/2019/000274/PRCGIA (Ver-1), TURSP-2020/202, IA/I/15/2/502086, BT/RLF/Re-entry/09/2015)
  • Indian Council of Medical Research (ICMR) (CRG/2020/002294, GIA/2019/000274/PRCGIA (Ver-1), TURSP-2020/202, IA/I/15/2/502086, BT/RLF/Re-entry/09/2015)
  • Taif University Researchers Supporting Project (CRG/2020/002294, GIA/2019/000274/PRCGIA (Ver-1), TURSP-2020/202, IA/I/15/2/502086, BT/RLF/Re-entry/09/2015)
  • DBT/Wellcome Trust India Alliance (CRG/2020/002294, GIA/2019/000274/PRCGIA (Ver-1), TURSP-2020/202, IA/I/15/2/502086, BT/RLF/Re-entry/09/2015)
  • Ramalingaswami Fellowship (CRG/2020/002294, GIA/2019/000274/PRCGIA (Ver-1), TURSP-2020/202, IA/I/15/2/502086, BT/RLF/Re-entry/09/2015)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
SARS-CoV-2, NSP4, ORF9b, mitochondrial DNA release, cell-free mitochondrial DNA, Bak, Mcl-1, apoptosis, intercellular mitochondrial transfer, mesenchymal stem cells, tunneling nanotubes, COVID-19 treatment, airway epithelial cells, inflammation
MeSH terms
COVID-19, SARS-CoV-2, Coronavirus Nucleocapsid Proteins, DNA, Mitochondrial, Humans, Mitochondria, Phosphoproteins, Viral Nonstructural Proteins, Myeloid Cell Leukemia Sequence 1 Protein

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