PRX302

Definition / meaning of PRX302

A targeted prodrug consisting of a recombinant modified form of the Aeromonas protoxin proaerolysin (PA), bearing a prostate-specific protease cleavage site, with potential antineoplastic activity. When injected directly into the prostate, PRX302 is hydrolyzed to the active toxin aerolysin by the serine protease prostate specific antigen (PSA), a protein overexpressed by prostate cancers and prostate cells in hyperplastic prostatic tissue. Aaerolysin molecules then oligomerize to form ring-like heptamers that are incorporated into the lipid bilayers of cell membranes, forming large membrane channels and resulting in the leakage of cellular contents and lysis of PSA-expressing prostate cells.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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