1. Academic Validation
  2. The nucleoside analog 4'-fluorouridine suppresses the replication of multiple enteroviruses by targeting 3D polymerase

The nucleoside analog 4'-fluorouridine suppresses the replication of multiple enteroviruses by targeting 3D polymerase

  • Antimicrob Agents Chemother. 2024 Apr 30:e0005424. doi: 10.1128/aac.00054-24.
Yongkang Chen # 1 Xiaohong Li # 2 Fengyang Han # 3 Beihong Ji 3 Yuan Li 1 Jingjing Yan 1 Min Wang 1 Jun Fan 1 Shuye Zhang 2 Lu Lu 1 Peng Zou 1
Affiliations

Affiliations

  • 1 Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences and Shanghai Public Health Clinical Center, Fudan University, Shanghai, China.
  • 2 Clinical Center for BioTherapy, Zhongshan Hospital, Fudan University, Shanghai, China.
  • 3 Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
  • # Contributed equally.
Abstract

Human enteroviruses are the major pathogens causing hand-foot-and-mouth disease in infants and young children throughout the world, and Infection with Enterovirus is also associated with severe complications, such as aseptic meningitis and myocarditis. However, there are no Antiviral drugs available to treat enteroviruses Infection at present. In this study, we found that 4'-fluorouridine (4'-FlU), a nucleoside analog with low cytotoxicity, exhibited broad-spectrum activity against infections of multiple enteroviruses with EC50 values at low micromolar levels, including coxsackievirus A10 (CV-A10), CV-A16, CV-A6, CV-A7, CV-B3, Enterovirus A71 (EV-A71), EV-A89, EV-D68, and echovirus 6. With further investigation, the results indicated that 4'-FlU directly interacted with the RNA-dependent RNA polymerase of Enterovirus, the 3D pol, and impaired the polymerase activity of 3D pol, hence inhibiting viral RNA synthesis and significantly suppressing viral replication. Our findings suggest that 4'-FlU could be promisingly developed as a broad-spectrum direct-acting Antiviral agent for anti-enteroviruses therapy.

Keywords

3D polymerase; 4′-fluorouridine; RdRp; antiviral agents; coxsackievirus; enterovirus.

Figures
Products