Caffeic Acid Has Antiviral Activity against Ilhéus Virus In Vitro

Viruses. 2023 Feb 10;15(2):494. doi: 10.3390/v15020494.

Abstract

Ilhéus virus (ILHV) is a neglected mosquito-borne flavivirus. ILHV infection may lead to Ilhéus fever, an emerging febrile disease like dengue fever with the potential to evolve into a severe neurological disease characterized by meningoencephalitis; no specific treatments are available for this disease. This study assessed the antiviral properties of caffeic acid, an abundant component of plant-based food products that is also compatible with the socioeconomic limitations associated with this neglected infectious disease. The in vitro activity of caffeic acid on ILHV replication was investigated in Vero and A549 cell lines using plaque assays, quantitative RT-PCR, and immunofluorescence assays. We observed that 500 µM caffeic acid was virucidal against ILHV. Molecular docking indicated that caffeic acid might interact with an allosteric binding site on the envelope protein.

Keywords: Ilhéus virus; antiviral activity; caffeic acid; in silico analysis; inhibition.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • A549 Cells
  • Allosteric Site
  • Animals
  • Antiviral Agents* / pharmacology
  • Humans
  • Molecular Docking Simulation

Substances

  • caffeic acid
  • Antiviral Agents

Grants and funding

This research was funded by grant 2013/21719-3 from FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo). M.L.N. is partially supported by the Centers for Research in Emerging Infectious Disease via The Coordinating Research on Emerging Arboviral Threats Encompassing the Neotropics (CREATE-NEO) grant U01AI151807 awarded by the National Institutes of Health (NIH/USA). M.L.N., P.R. and R.E.M are CNPq Research Fellows. M.V.S. was supported by a FAPESP PhD Scholarship, process 2020/12875-5. G.L.M. was supported by a CAPES PhD Scholarship, process 88887.659079/2021-00. V.G.d.C. was supported by a Unesp Post-doctoral Scholarship, with project n. 4320 (Edital PROPe 13/2022). A.C.d.C. was supported by a FAPESP PhD Scholarship, process 2018/02993-0. M.A.F. was supported by a CNPq PhD Scholarship, process 141253/2019-3.