Repligen Announces Completion of Patient Treatment in Phase 3 Clinical Trial of RG1068 in MRI Imaging of the Pancreas

WALTHAM, MA - October 19, 2009 - Repligen Corporation (NASDAQ: RGEN) reported today that it has completed patient treatment in its Phase 3 clinical trial of RG1068, synthetic human secretin, in magnetic resonance imaging (MRI) of the pancreas. The study is designed to assess the sensitivity and specificity of RG1068 in conjunction with MRI for the detection of pancreatic duct abnormalities compared to MRI alone. Additional assessments include safety, physician confidence in the identification of structural abnormalities, the number of pancreatic duct segments visualized and the improvement in the quality of the MRI images. The study enrolled 258 patients at 23 clinical sites within the U.S. and Canada. Detailed visual assessment of the pancreatic ducts is important in the diagnosis and treatment of diseases such as acute and chronic pancreatitis.

Structural abnormalities of the pancreatic ducts were assessed by RG1068 used in conjunction with MRI and independently by endoscopy, a commonly used invasive procedure. There were no serious adverse events (SAEs) associated with the RG1068/MRI procedure compared to 68 patients with an SAE associated with endoscopy. The most commonly reported SAE following endoscopy was acute pancreatitis requiring hospitalization.

source: Repligen Corporation