Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78

Zeng, Wei; Ren, Jingping; Yang, Gan; Jiang, Changsheng; Dong, Ling; Sun, Qi; Hu, Yaofang; Li, Wentao; He, Qigai

doi:10.3390/ijms24054936

Open AccessArticle

Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78

by

Wei Zeng

^1,2,

Jingping Ren

^1,2,

Gan Yang

^1,2,

Changsheng Jiang

^1,2,

Ling Dong

^1,2,

Qi Sun

^1,2,

Yaofang Hu

^1,2,

Wentao Li

^1,2

and

Qigai He

^1,2,*

¹

State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China

²

The Cooperative Innovation Center for Sustainable Pig Production, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China

^*

Author to whom correspondence should be addressed.

Int. J. Mol. Sci. 2023, 24(5), 4936; https://doi.org/10.3390/ijms24054936

Submission received: 30 January 2023 / Revised: 25 February 2023 / Accepted: 28 February 2023 / Published: 3 March 2023

(This article belongs to the Special Issue Molecular Research on Coronavirus: Pathogenic Mechanism, Antiviral Drugs and New Vaccines)

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Abstract

Porcine epidemic diarrhea virus (PEDV), a member of the α-coronavirus genus, can cause vomiting, diarrhea, and dehydration in piglets. Neonatal piglets infected with PEDV have a mortality rate as high as 100%. PEDV has caused substantial economic losses to the pork industry. Endoplasmic reticulum (ER) stress, which can alleviate the accumulation of unfolded or misfolded proteins in ER, involves in coronavirus infection. Previous studies have indicated that ER stress could inhibit the replication of human coronaviruses, and some human coronaviruses in turn could suppress ER stress-related factors. In this study, we demonstrated that PEDV could interact with ER stress. We determined that ER stress could potently inhibit the replication of GⅠ, GⅡ-a, and GⅡ-b PEDV strains. Moreover, we found that these PEDV strains can dampen the expression of the 78 kDa glucose-regulated protein (GRP78), an ER stress marker, while GRP78 overexpression showed antiviral activity against PEDV. Among different PEDV proteins, PEDV non-structural protein 14 (nsp14) was revealed to play an essential role in the inhibition of GRP78 by PEDV, and its guanine-N7-methyltransferase domain is necessary for this role. Further studies show that both PEDV and its nsp14 negatively regulated host translation, which could account for their inhibitory effects against GRP78. In addition, we found that PEDV nsp14 could inhibit the activity of GRP78 promotor, helping suppress GRP78 transcription. Our results reveal that PEDV possesses the potential to antagonize ER stress, and suggest that ER stress and PEDV nsp14 could be the targets for developing anti-PEDV drugs.

Keywords: PEDV; ER stress; GRP78; nsp14

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MDPI and ACS Style

Zeng, W.; Ren, J.; Yang, G.; Jiang, C.; Dong, L.; Sun, Q.; Hu, Y.; Li, W.; He, Q. Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78. Int. J. Mol. Sci. 2023, 24, 4936. https://doi.org/10.3390/ijms24054936

AMA Style

Zeng W, Ren J, Yang G, Jiang C, Dong L, Sun Q, Hu Y, Li W, He Q. Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78. International Journal of Molecular Sciences. 2023; 24(5):4936. https://doi.org/10.3390/ijms24054936

Chicago/Turabian Style

Zeng, Wei, Jingping Ren, Gan Yang, Changsheng Jiang, Ling Dong, Qi Sun, Yaofang Hu, Wentao Li, and Qigai He. 2023. "Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78" International Journal of Molecular Sciences 24, no. 5: 4936. https://doi.org/10.3390/ijms24054936

APA Style

Zeng, W., Ren, J., Yang, G., Jiang, C., Dong, L., Sun, Q., Hu, Y., Li, W., & He, Q. (2023). Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78. International Journal of Molecular Sciences, 24(5), 4936. https://doi.org/10.3390/ijms24054936

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Porcine Epidemic Diarrhea Virus and Its nsp14 Suppress ER Stress Induced GRP78

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