News | January 7, 2010

Enzon Opens A Phase 2 Study Of PEG-SN38 For Metastatic Breast Cancer

Enzon Pharmaceuticals, Inc. recently 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.

"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.

For more information, visit

About Enzon

Enzon Pharmaceuticals, Inc. is a biopharmaceutical company dedicated to developing, manufacturing and commercializing important medicines for patients with cancer and other life-threatening conditions. The Company has a portfolio of four marketed products, Oncaspar, DepoCyt, Abelcet and Adagen. Enzon's drug development programs utilize several cutting-edge approaches, including its industry-leading PEGylation technology platform and the Locked Nucleic Acid (LNA) technology. Enzon's PEGylation technology was used to develop two of its products, Oncaspar and Adagen, and has created a royalty revenue stream from licensing partnerships for other products developed using the technology. Enzon also engages in contract manufacturing for several pharmaceutical companies to broaden its revenue base. For more information, visit

SOURCE: Enzon Pharmaceuticals, Inc.