Immune Design, a California-based clinical-stage immunotherapy company, has entered into a broad collaboration for the development of a herpes simplex virus (HSV) immune therapy with Sanofi Pasteur, the vaccines division of Sanofi.

Sanofi Pasteur and Immune Design each will contribute product candidates to the collaboration: Sanofi Pasteur will contribute HSV-529, a clinical-stage replication-defective HSV vaccine product candidate; and Immune Design will contribute G103, its preclinical trivalent vaccine product candidate. The collaboration will explore the potential of various combinations of agents, including leveraging Immune Design's GLAAS platform, with the goal to select the best potential immune therapy for patients.

The two companies will develop the products jointly through phase II clinical trials, at which point Sanofi Pasteur intends to continue development of the most promising candidate and be responsible for commercialization. Sanofi Pasteur will bear the costs of all preclinical and clinical development, with Immune Design providing a specific formulation of GLA from the GLAAS platform at its cost through phase II studies. Immune Design will be eligible to receive future milestone and royalty payments on any product developed from the collaboration; other financial terms of the agreement have not been disclosed.