( Additional data to be published in an ...)Protox Announces Publication in Journal of the National Cancer,Institute Supporting PRX302 as Treatment for Prostatic Diseases,Health

Additional data to be published in an upcoming issue of Anti-Cancer Drugs

VANCOUVER, March 20 /CNW/ - Protox(TM) Therapeutics Inc. (TSX-V:PRX) today announced that two peer-reviewed publications will feature Protox's PRX 302. The Journal of the National Cancer Institute ("JNCI") has published the work conducted by Dr. Sam Denmeade and his team at Johns Hopkins University in collaboration with Protox scientists. The paper describes the Company's compound, PRX302, which is a prostate specific antigen (PSA) activated pro-drug being developed for the treatment of prostate cancer and BPH.

"Having results of our PRX302 research program published in a prestigious journal such as JNCI is a testament to the importance of advancing PRX302 for prostate cancer and BPH," stated Dr. Fahar Merchant, President and CEO of Protox. "The published results are consistent with the encouraging interim data from the ongoing Phase I prostate cancer trial reported earlier this year and supports the planned Phase I BPH clinical trial which we expect to commence in Q2 of 2007."

The major advantage of using PRX302 as a therapeutic agent for prostatic diseases is that it involves direct injection into the target tissue and selective activation by PSA produced only by the target tissue. The paper, entitled "A prostate-specific antigen-activated channel-forming toxin as therapy for prostatic disease" (JNCI, Vol.99, Issue 5 pp, 376-385) found that: PRX302 direct injection into the prostate did not cause any attributable accumulation of PRX302 outside of the prostate gland; is not toxic to adjacent non-PSA producing organs and tissues; and PRX302 has a selective mechanism of action and favourable safety profile.

A second paper entitled, "Recombinant prostate-specific antigen proaerolysin shows selective protease sensitivity and cell cytotoxicity" is to appear in the upcoming issue of Anti-Cancer Drugs (ACD). The journal will publish the work cond
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