HSP90AB1 Is a Host Factor Required for Transmissible Gastroenteritis Virus Infection.

Abstract

Transmissible gastroenteritis virus (TGEV) is an important swine enteric coronavirus causing viral diarrhea in pigs of all ages. Currently, the development of antiviral agents targeting host proteins to combat viral infection has received great attention. The heat shock protein 90 (HSP90) is a critical host factor and has important regulatory effects on the infection of various viruses. However, its roles in porcine coronavirus infection remain unclear. In this study, the effect of HSP90 on TGEV infection was evaluated. In addition, the influence of its inhibitor VER-82576 on proinflammatory cytokine (IL-6, IL-12, TNF-α, CXCL10, and CXCL11) production induced by TGEV infection was further analyzed. The results showed that the knockdown of HSP90AB1 and HSP90 inhibitor VER-82576 treatment resulted in a reduction in TGEV M gene mRNA levels, the N protein level, and virus titers in a dose-dependent manner, while the knockdown of HSP90AA1 and KW-2478 treatment had no significant effect on TGEV infection. A time-of-addition assay indicated that the inhibitory effect of VER-82576 on TGEV infection mainly occurred at the early stage of viral replication. Moreover, the TGEV-induced upregulation of proinflammatory cytokine (IL-6, IL-12, TNF-α, CXCL10, and CXCL11) expression was significantly inhibited by VER-82576. In summary, these findings indicated that HSP90AB1 is a host factor enhancing TGEV infection, and the HSP90 inhibitor VER-82576 could reduce TGEV infection and proinflammatory cytokine production, providing a new perspective for TGEV antiviral drug target design.

• Authors: Daili Song, Yujia Zhao, Ying Sun, Yixiao Liang, Rui Chen, Yiping Wen, Rui Wu, Qin Zhao, Senyan Du, Qigui Yan, Xinfeng Han, Sanjie Cao, Xiaobo Huang
• Journal: International journal of molecular sciences (Int J Mol Sci) Vol. 24 Issue 21 (Nov 04 2023) ISSN: 1422-0067 [Electronic] Switzerland
• PMID: 37958953 (Publication Type: Journal Article)

Chemical References

• Tumor Necrosis Factor-alpha
• Interleukin-6
• Cytokines
• Interleukin-12

Topics

• Swine
• Animals
• Transmissible gastroenteritis virus (genetics)
• Gastroenteritis, Transmissible, of Swine (genetics)
• Tumor Necrosis Factor-alpha (genetics, pharmacology)
• Interleukin-6 (pharmacology)
• Cytokines (genetics, pharmacology)
• Interleukin-12 (pharmacology)