Jan 6 2010
Enzon Pharmaceuticals, Inc. (Nasdaq: ENZN) today announced that the 
      first patient has been treated in the Phase 2 studies of PEG-SN38 for 
      metastatic breast cancer. PEG-SN38 or EZN-2208 is Enzon’s PEGylated form 
      of SN38, the active metabolite of the cancer drug Camptosar® 
      (irinotecan HCl injection). The study is designed to evaluate the 
      efficacy of single-agent PEG-SN38 in two groups of patients who have 
      received prior therapy regimens of anthracycline and taxane or 
      anthracycline, taxane and Xeloda. The PEG-SN38 compound is currently 
      being evaluated in a Phase 2 study for metastatic colorectal cancer.
    
“Irinotecan is known to be active in metastatic breast cancer but 
      toxicity has limited its broad use. We are very excited about evaluating 
      the novel PEG-SN38 compound in hopes that it will exhibit an improved 
      treatment for metastatic breast cancer patients”
    
      "We continue to be encouraged by our PEG-SN38 compound and are pleased 
      to be advancing it into additional areas of cancer,” said Jeffrey H. 
      Buchalter, Enzon's president and chief executive officer. "We look 
      forward to providing updates on PEG-SN38 and the rest of our novel 
      pipeline as data becomes available.”
    
    
      “Irinotecan is known to be active in metastatic breast cancer but 
      toxicity has limited its broad use. We are very excited about evaluating 
      the novel PEG-SN38 compound in hopes that it will exhibit an improved 
      treatment for metastatic breast cancer patients,” said Dr Joyce 
      O'Shaughnessy, Baylor-Charles A. Sammons Cancer Center.
    
http://www.enzon.com/