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Trichosanthin affects HSV-1 replication in Hep-2 cells.

Dong-Xu He¹, Siu-Cheung Tam

¹School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.

Biochemical and Biophysical Research Communications

|October 26, 2010

Summary

This summary is machine-generated.

Trichosanthin (TCS) inhibits herpes simplex virus type 1 (HSV-1) replication by targeting early to late infection stages. This antiviral protein reduces viral DNA and antigen production, diminishing virion release in Hep-2 cells.

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Ex Vivo Infection of Murine Epidermis with Herpes Simplex Virus Type 1

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Published on: August 24, 2015

Area of Science:

Virology
Molecular Biology
Biochemistry

Background:

Trichosanthin (TCS) is a type I ribosome-inactivating protein with known antiviral properties.
TCS inhibits replication of human immunodeficiency virus type 1 (HIV-1) and herpes simplex virus type 1 (HSV-1).
The precise mechanism by which TCS inhibits HSV-1 replication remains unclear.

Purpose of the Study:

To investigate the specific effects of TCS on the different stages of HSV-1 infection.
To elucidate the mechanism of antiviral action of TCS against HSV-1 in cell culture.

Main Methods:

Hep-2 cells were infected with HSV-1.
Treated with Trichosanthin (TCS) at various stages of the viral life cycle.
Assessed viral antigen and DNA content.
Monitored viral gene expression (immediate-early, early, and late).
Quantified virion release.

Main Results:

TCS did not affect HSV-1 attachment, penetration, or immediate-early gene expression.
TCS significantly reduced HSV-1 antigen and DNA levels starting from 3-15 hours post-infection.
The expression of HSV-1 early and late genes was diminished by TCS treatment.
Virion release was significantly reduced.

Conclusions:

Trichosanthin (TCS) primarily inhibits HSV-1 replication during the early to late stages of infection in Hep-2 cells.
TCS interferes with viral gene expression and virion assembly/release, rather than initial entry or immediate-early events.
These findings contribute to understanding the antiviral mechanisms of ribosome-inactivating proteins like TCS.