Type-II IFN inhibits SARS-CoV-2 replication in human lung epithelial cells and ex vivo human lung tissues through indoleamine 2,3-dioxygenase-mediated pathways

© 2024 The Authors. Journal of Medical Virology published by Wiley Periodicals LLC..

Interferons (IFNs) are critical for immune defense against pathogens. While type-I and -III IFNs have been reported to inhibit SARS-CoV-2 replication, the antiviral effect and mechanism of type-II IFN against SARS-CoV-2 remain largely unknown. Here, we evaluate the antiviral activity of type-II IFN (IFNγ) using human lung epithelial cells (Calu3) and ex vivo human lung tissues. In this study, we found that IFNγ suppresses SARS-CoV-2 replication in both Calu3 cells and ex vivo human lung tissues. Moreover, IFNγ treatment does not significantly modulate the expression of SARS-CoV-2 entry-related factors and induces a similar level of pro-inflammatory response in human lung tissues when compared with IFNβ treatment. Mechanistically, we show that overexpression of indoleamine 2,3-dioxygenase 1 (IDO1), which is most profoundly induced by IFNγ, substantially restricts the replication of ancestral SARS-CoV-2 and the Alpha and Delta variants. Meanwhile, loss-of-function study reveals that IDO1 knockdown restores SARS-CoV-2 replication restricted by IFNγ in Calu3 cells. We further found that the treatment of l-tryptophan, a substrate of IDO1, partially rescues the IFNγ-mediated inhibitory effect on SARS-CoV-2 replication in both Calu3 cells and ex vivo human lung tissues. Collectively, these results suggest that type-II IFN potently inhibits SARS-CoV-2 replication through IDO1-mediated antiviral response.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:96

Enthalten in:

Journal of medical virology - 96(2024), 2 vom: 19. Feb., Seite e29472

Sprache:

Englisch

Beteiligte Personen:

Yang, Dong [VerfasserIn]
Chan, Jasper Fuk-Woo [VerfasserIn]
Yoon, Chaemin [VerfasserIn]
Luk, Tsz-Yat [VerfasserIn]
Shuai, Huiping [VerfasserIn]
Hou, Yuxin [VerfasserIn]
Huang, Xiner [VerfasserIn]
Hu, Bingjie [VerfasserIn]
Chai, Yue [VerfasserIn]
Yuen, Terrence Tsz-Tai [VerfasserIn]
Liu, Yuanchen [VerfasserIn]
Zhu, Tianrenzheng [VerfasserIn]
Liu, Huan [VerfasserIn]
Shi, Jialu [VerfasserIn]
Wang, Yang [VerfasserIn]
He, Yixin [VerfasserIn]
Sit, Ko-Yung [VerfasserIn]
Au, Wing-Kuk [VerfasserIn]
Zhang, Anna Jinxia [VerfasserIn]
Yuan, Shuofeng [VerfasserIn]
Zhang, Bao-Zhong [VerfasserIn]
Huang, Yao-Wei [VerfasserIn]
Chu, Hin [VerfasserIn]

Links:

Volltext

Themen:

9008-11-1
Antiviral Agents
COVID-19
Ex vivo human lung tissues
IDO1
Indoleamine 2,3-dioxygenase
Indoleamine-Pyrrole 2,3,-Dioxygenase
Interferon
Interferons
Journal Article
SARS-CoV-2
Type-II IFN

Anmerkungen:

Date Completed 21.02.2024

Date Revised 21.02.2024

published: Print

Citation Status MEDLINE

doi:

10.1002/jmv.29472

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM368632601