SARS-CoV-2 and oncolytic EV-D68-encoded proteases differentially regulate pyroptosis

Pyroptosis, a pro-inflammatory programmed cell death, has been implicated in the pathogenesis of coronavirus disease 2019 and other viral diseases. Gasdermin family proteins (GSDMs), including GSDMD and GSDME, are key regulators of pyroptotic cell death. However, the mechanisms by which virus infection modulates pyroptosis remain unclear. Here, we employed a mCherry-GSDMD fluorescent reporter assay to screen for viral proteins that impede the localization and function of GSDMD in living cells. Our data indicated that the main protease NSP5 of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) blocked GSDMD-mediated pyroptosis via cleaving residues Q29 and Q193 of GSDMD. While another SARS-CoV-2 protease, NSP3, cleaved GSDME at residue G370 but activated GSDME-mediated pyroptosis. Interestingly, respiratory enterovirus EV-D68-encoded proteases 3C and 2A also exhibit similar differential regulation on the functions of GSDMs by inactivating GSDMD but initiating GSDME-mediated pyroptosis. EV-D68 infection exerted oncolytic effects on human cancer cells by inducing pyroptotic cell death. Our findings provide insights into how respiratory viruses manipulate host cell pyroptosis and suggest potential targets for antiviral therapy as well as cancer treatment.IMPORTANCEPyroptosis plays a crucial role in the pathogenesis of coronavirus disease 2019, and comprehending its function may facilitate the development of novel therapeutic strategies. This study aims to explore how viral-encoded proteases modulate pyroptosis. We investigated the impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and respiratory enterovirus D68 (EV-D68) proteases on host cell pyroptosis. We found that SARS-CoV-2-encoded proteases NSP5 and NSP3 inactivate gasdermin D (GSDMD) but initiate gasdermin E (GSDME)-mediated pyroptosis, respectively. We also discovered that another respiratory virus EV-D68 encodes two distinct proteases 2A and 3C that selectively trigger GSDME-mediated pyroptosis while suppressing the function of GSDMD. Based on these findings, we further noted that EV-D68 infection triggers pyroptosis and produces oncolytic effects in human carcinoma cells. Our study provides new insights into the molecular mechanisms underlying virus-modulated pyroptosis and identifies potential targets for the development of antiviral and cancer therapeutics.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:98

Enthalten in:

Journal of virology - 98(2024), 2 vom: 20. Feb., Seite e0190923

Sprache:

Englisch

Beteiligte Personen:

Shen, Siyu [VerfasserIn]
Guo, Haoran [VerfasserIn]
Li, Yan [VerfasserIn]
Zhang, Lili [VerfasserIn]
Tang, Yubin [VerfasserIn]
Li, Huili [VerfasserIn]
Li, Xiaohan [VerfasserIn]
Wang, Pei-Hui [VerfasserIn]
Yu, Xiao-Fang [VerfasserIn]
Wei, Wei [VerfasserIn]

Links:

Volltext

Themen:

3C-like proteinase, SARS-CoV-2
Comparative Study
EC 3.4.-
EC 3.4.22.-
EC 3.4.22.2
EV-D68
Endopeptidases
GSDMD
GSDMD protein, human
GSDME
Gasdermins
Journal Article
Papain-like protease, SARS-CoV-2
Pyroptosis
SARS-CoV-2
Viral Proteins
Viral protease

Anmerkungen:

Date Completed 21.02.2024

Date Revised 01.03.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1128/jvi.01909-23

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM367794578