( Data Presented at American Association ...)Adventrx Announces Positive Data From Multidrug Therapy With,CoFactor,Health

SAN DIEGO, April 18, 2007 /PRNewswire-FirstCall/ -- ADVENTRX Pharmaceuticals, Inc. , a biopharmaceutical research and development company focused on commercializing proprietary product candidates for the treatment of cancer and infectious diseases, today announced positive results from preclinical studies using a multidrug treatment regimen including ANX-510 (CoFactor(R)) at the American Association for Cancer Research (AACR) Annual Meeting. Treatment with a regimen including CoFactor with 5-fluorouracil (5-FU) and capecitabine (Xeloda(R)), an oral prodrug of 5-FU, demonstrated superior inhibition of tumor growth and longer survival, with lower systemic toxicity compared with treatment groups containing leucovorin or capecitabine alone in a colorectal tumor model. An abstract entitled "Antitumor activity and safety of a hybrid treatment regimen of 5,10-methylenetetrahydrofolate, 5-fluorouracil, and capecitabine in a colorectal tumor xenograft model" was presented yesterday by the study's lead author Mark Cantwell, Ph.D., the Company's vice president of research and development.

"We believe CoFactor has the potential to improve fluoropyrimidine chemotherapies and reduce toxicity in multiple treatment regimens," said Evan M. Levine, ADVENTRX chief executive officer. "Based on these and other data, we are continuing to evaluate various treatment combinations to identify additional commercial opportunities and expand the value of CoFactor."

Tumor-bearing mice treated with CoFactor, 5-FU and capecitabine had the greatest inhibition of tumor growth compared to the other drug regimens tested in this study, including capecitabine alone and a matched treatment regimen of leucovorin (LV), 5-FU, and capecitabine. The mean tumor volume of the CoFactor, 5-FU and capecitabine-treated mice (288.5 mm3 +/- 32.6, mean +/- SEM) was statistical
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