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Alnylam Starts Phase I/II Trial of Complement-mediated Disease Therapy


NEW YORK (GenomeWeb) – Alnylam Pharmaceuticals today announced that it has started a Phase I/II trial of its complement-mediated disease treatment ALN-CC5.

The complement system is involved in immunity as a protective mechanism for host defense, and dysregulation of the system can create serious complications in a variety of diseases, according to the company.

ALN-CC5 is designed to silence complement component C5, which is primarily expressed in liver cells and whose loss is associated with an attenuated immune response against certain infections. It uses Alnylam's second-generation GalNAc delivery conjugate technology, which enables subcutaneous administration.

Alnylam's planned Phase I/II study would begin by testing the drug in up to 60 healthy volunteers, then in up to eight patients with paroxysmal nocturnal hemoglobinuria. The first part of the study is designed to evaluate safety and tolerability of single and multiple doses of ALN-CC5. The second part will assess, safety, tolerability, pharmacokinetics and pharmacodynamics, and clinical activity, as well as evaluate of the drug's effect on lactate dehydrogenase, a measure of red blood cell hemolysis.

Initial data from the study is expected mid-year, with additional data available by the end of 2015.