Ann: pSivida commences new clinical trial with Pf, page-5

re: Ann: pSivida commences new clinical trial... http://invivoblog.blogspot.com/2011/06/dotw-save-date.html

Pfizer/pSivida: Is Pfizer in or out of ophthalmology these days? This week's amended deal between the big pharma behemoth and drug delivery play pSivida makes it clear Pfizer is willing to do what it must to protect its once daily glaucoma eye-drop Xalatan, which generated $1.75 billion in revenue in 2010 but lost key patent protection in March.

Still, as Pfizer continues to redefine its innovative core (without, one hopes, experiencing a breach), it's not so interested in ophtho that it wants to consider a broader deal with pSivida any longer.

The Watertown, MA-biotech pSivida originally aligned with Pfizer in 2007 under a far-reaching deal that gave the big drug maker exclusive world-wide rights to its implant technology, as well as a 10% ownership stake. Under the revised agreement announced June 14, Pfizer will pay the biotech $2.3 million upfront for an option, which can be exercised at the end of Phase II, on an implant device that bathes the front of the eye with a sustained-release version of Xalatan.

If Pfizer options the product, it will pay pSivida an additional $20 million and up to $146.5 million more in clinical and regulatory milestones. Despite Xalatan's ability to effectively lower intra-ocular pressures without terribly onerous side-effects, compliance is a problem. (One main reason: Administering drops on a daily basis is a pain in the, eye.) As a result, there's a lot of effort in the start-up community to develop implantable devices that improve adherence by obviating the need for daily administration.

The 2007 deal revision provides significant potential upside for pSivida since it can now solicit partnerships with other drug makers. Among the most active deal makers in ophtho: Merck (which took out Inspire earlier this year), Novartis (via its Alcon group), Roche/Genentech, and of course specialty players like Allergan and Baush & Lomb