Nventa Biopharmaceuticals Corporation Granted U.S. Patent Covering Heat Shock Protein Fusion to Treat Anogenital Warts

SAN DIEGO, CA, May 3 /PRNewswire-FirstCall/ - Nventa Biopharmaceuticals Corporation announced today that the U.S. Patent and Trademark Office has issued Patent Number 7,211,411 B2 to Nventa covering the use of HspE7, the Company’s investigational therapeutic vaccine for human papillomavirus (HPV)-related diseases, to treat patients with anogenital warts. This new U.S. patent covers a method of treating a patient with anogenital warts using a fusion protein comprised of a heat shock protein from the Hsp60 family, which includes Hsp65, and an HPV (type 16) E7 antigen. This patent provides additional patent exclusivity for HspE7 to treat anogenital warts patients through September 2022.

“This new patent strengthens our patent protection around HspE7 in a very large market,” said Gregory M. McKee, President and Chief Executive Officer at Nventa. “There are one million new cases of genital warts diagnosed in the U.S. every year, and few good treatment options are available. We are currently poised to re-start clinical development mid-2007 of new HspE7 which incorporates an adjuvant. Following successful completion of our Phase 1 bridging trial with HspE7, we expect to initiate Phase 2 efficacy studies, which may also include a trial in patients with anogenital warts.”

About Nventa Biopharmaceuticals Corporation:

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Nventa is developing innovative therapeutics for the treatment of viral infections and cancer, with a focus on diseases caused by the human papillomavirus (HPV). The Company is publicly traded on the Toronto Stock Exchange under the symbol NVN. For more information about Nventa Biopharmaceuticals Corporation, please visit the Company’s website located at www.nventacorp.com.

This press release contains statements which, to the extent that they are not recitations of historical fact may constitute forward-looking information under applicable Canadian securities legislation or forward-looking statements within the meaning of the Unites States Private Securities Litigation Reform Act of 1995. Such forward-looking statements or information may include financial and other projections as well as statements regarding the Company’s future plans, objectives, performance, revenues, growth, profits, operating expenses or the Company’s underlying assumptions. The words “may”, “would”, “could”, “will”, “likely”, “expect,” “anticipate,” “intend”, “estimate”, “intend”, “plan”, “forecast”, “project”, “estimate” and “believe” or other similar words and phrases are intended to identify forward-looking statements or information. Persons reading this press release are cautioned that such statements or information are only predictions, and that the Company’s actual future results or performance may be materially different.

Forward-looking statements or information in this press release include, but are not limited to, statements or information concerning the coverage provided by this patent.

Such forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause our actual results, events or developments, or industry results, to be materially different from any future results, events or developments expressed or implied by such forward-looking statements or information. Such factors include, among others, potential challenges to our patent and other factors as described in detail in our filings with the Canadian securities regulatory authorities at www.sedar.com. Given these risks and uncertainties, you are cautioned not to place undue reliance on such forward-looking statements and information, which are qualified in their entirety by this cautionary statement.

Assumptions underlying our expectations regarding forward-looking statements or information contained in this press release include, among others, that challenges to our patent, if any, will be unsuccessful.

For a complete discussion of the assumptions, risks and uncertainties related to our business, you are encouraged to review our filings with Canadian securities regulatory authorities, including our 2006 Annual Information Form filed on SEDAR at http://www.sedar.com. Historical filings relating to the Company prior to the completion of the Company’s March 23, 2006 corporate reorganization, including Stressgen’s 2005 Annual Information Form dated March 16, 2006 may be reviewed on SEDAR at http://www.sedar.com under the SEDAR profile GVIC Publications Ltd.

All forward-looking statements and information made herein are based on our current expectations as of the date hereof and we disclaim any intention or obligation to revise or update such forward-looking statements and information to reflect subsequent events or circumstances, except as required by law.

CONTACT: Donna Slade, Director, Investor Relations, 9381 Judicial Drive, Suite 180, San Diego, CA, USA, 92121, Dir: (858) 202-4945, dslade@nventacorp.com

Nventa Biopharmaceuticals Corporation

CONTACT: Donna Slade, Director, Investor Relations, 9381 Judicial Drive,Suite 180, San Diego, CA, USA, 92121, Dir: (858) 202-4945,dslade@nventacorp.com

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