- Scientists at University of Texas at Austin have identified how cells recognize a viral toxin.

- The discovery could contribute to the development of new antiviral drugs.

Summary

A team of researchers at the University of Texas at Austin has discovered how cells recognize a viral toxin. The findings, published in the journal eLife, could contribute to the development of new antiviral drugs.

Viruses are microscopic pathogens that can cause a variety of diseases, from the common cold to more serious illnesses like HIV/AIDS. Viruses use a variety of mechanisms to infect cells, including the use of toxins.

Toxins are poisonous substances that can damage or kill cells. One type of toxin, known as a pore-forming toxin, creates pores or holes in the cell membrane, causing the cell to leak its contents and die.

The researchers at UT Austin focused on a pore-forming toxin called colicin E1, which is produced by the bacterium Escherichia coli. They found that colicin E1 is recognized by a protein on the surface of the cell membrane called TLR4. TLR4 is a Toll-like receptor, a type of protein that plays a role in the immune system.

When TLR4 recognizes colicin E1, it triggers a cascade of events that leads to the production of inflammatory cytokines. These cytokines are small proteins that signal the immune system to attack the virus.

The researchers say their findings could contribute to the development of new antiviral drugs that target TLR4. By blocking TLR4, it may be possible to prevent viruses from infecting cells.

The researchers are now working to identify other Toll-like receptors that may recognize other viral toxins. They say their goal is to develop a new class of antiviral drugs that are effective against a wide range of viruses.