Diamyd closes European Phase III study

Diamyd Medical AB reports that the Company has decided not to complete the follow-up period of a European Phase III study with the antigen-based therapy Diamyd®.

On May 9, the Company reported that its European Phase III study with the antigen based therapy Diamyd® did not meet the primary efficacy endpoint of preserving beta cell function at 15 months, as measured by meal stimulated C-peptide, although a small positive effect was seen. Furthermore, Diamyd® was well tolerated as demonstrated by a similar number of adverse events in the Diamyd® treated groups as well as in the placebo treated group.

As part of a planned, longer-term follow-up, patients in the study were being followed for an additional 15 months, aiming to determine the durability of the treatment effect at 30 months. Following comprehensive evaluation of the collected study data, Diamyd Medical has decided not to complete the follow-up period.

"Given that the European Phase III study did not meet the primary efficacy endpoint, it is difficult to justify continuing the follow-up period, although the results suggest beneficial effects in certain subgroups," says Peter Zerhouni, Acting President and CEO of Diamyd Medical. "We would, once again, like to express our sincere gratitude to all the study participants, as well as their families and the many doctors and nurses who made the study possible. Our parallel US Phase III study, DiaPrevent, continues and we hope it will result in a different outcome."

The European Phase III study enrolled more than 320 patients between 10 and 20 years of age who were diagnosed with type 1 diabetes within three months of entering the study. The study includes three treatment arms in which one-third of the patients received four subcutaneous injections of Diamyd®; one-third received two injections of Diamyd®; and one-third received placebo (non-active substance). The patients have been followed for at least 6 months after receiving the last injection of Diamyd® or placebo, fulfilling the main study period of 15 months and the study drug was well tolerated. Detailed results from the study will be presented at the American Diabetes Association's 71st Scientific Sessions in San Diego, CA, USA, June 24-28, 2011.

An ongoing parallel US Phase III study, DiaPrevent, was fully enrolled in December 2010, and results are expected in the summer of 2012. In addition, the research consortium Type 1 diabetes TrialNet is conducting a Phase II trial with Diamyd® in the US and Canada with similar design. Another externally funded and researcher-initiated Phase II study with Diamyd® in progress is aiming to prevent type 1 diabetes from developing in high risk subjects.