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Updated: Jul 13, 2026

Assays for the Identification of Novel Antivirals against Bluetongue Virus
Published on: October 11, 2013
Novel small-molecule inhibitors of transmissible gastroenteritis virus
Cheng-Wei Yang1, Yung-Ning Yang, Po-Huang Liang
1Division of Biotechnology and Pharmaceutical Research, National Health Research Institute, 35, Keyan Road, Zhunan Town, Miaoli County 350, Taiwan, Republic of China.
Abstract:
We used swine testicle (ST) cells infected with transmissible gastroenteritis virus (TGEV) and an indirect immunofluorescent assay with antibodies against TGEV spike and nucleocapsid proteins to screen small-molecule compounds that inhibit TGEV replication. Analogues of initial hits were collected and subjected to a 3CL protease (3CL(pro)) inhibition assay with recombinant 3CL(pro) and a fluorogenic peptide substrate. A series of benzothiazolium compounds were found to have inhibitory activity against TGEV 3CL(pro) and to exert anti-TGEV activities in terms of viral protein and RNA replication in TGEV-infected ST cells, with consequent protection of TGEV-infected ST cells from cytopathic effect by blocking the activation of caspase-3.
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