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. 2021 Sep;166(9):2443-2450.
doi: 10.1007/s00705-021-05107-w. Epub 2021 Jun 25.

Icariin, Formononetin and Caffeic Acid Phenethyl Ester Inhibit Feline Calicivirus Replication In Vitro

Zhanding Cui #  1   2 , Qian Wang #  3 , Dengliang Li  4 , Shihui Zhao  2 , Qian Zhang  2 , Yuxin Tan  2 , Qianwen Gong  5 , Ting Liu  6 , Jiang Shao  2 , Shuang Zhang  2 , Hailong Huang  2 , Junzheng Wang  2 , Zhihua Pei  2 , Hao Dong  7 , Kai Wang  2 , Guixue Hu  8 , Zhiyong Li  9
Affiliations

Icariin, Formononetin and Caffeic Acid Phenethyl Ester Inhibit Feline Calicivirus Replication In Vitro

Zhanding Cui et al. Arch Virol. 2021 Sep.

Abstract

Cats infected with feline calicivirus (FCV) often display oral ulcers and inflammation of the upper respiratory tract, which can lead to death in severe cases. Antiviral therapy is one of the most effective ways to control FCV infection. Natural compounds in Chinese herbal medicines and medicinal plants provide abundant resources for research on antiviral drugs. In this study, we found that icariin (ICA), formononetin (FMN) and caffeic acid phenethyl ester (CPAE) show low cytotoxicity towards F81 cells, that the three natural compounds have apparent antiviral effects on FCV in vitro, and that they can inhibit different FCV strains. Then, we found that ICA and FMN mainly function in the early stage of FCV infection, while CAPE can function in both the early and late stages of FCV infection. Finally, we found that ICA has an antagonistic effect on FMN and CAPE in FCV infection, and FMN has a synergistic effect with CAPE against FCV infection. Our results showed that ICA, FMN and CAPE may be potential drug candidates for FCV-induced diseases.

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