Abbott Laboratories (ABT) said it has entered an agreement with Galapagos NV (GLPG.BT) to develop and commercialize an oral treatment for rheumatoid arthritis and other autoimmune diseases.

The treatment, GLPG0634, is currently in Phase II development. Galapagos expects to complete its Phase II studies in 2014.

Under the terms of the agreement, Abbott will make an initial upfront payment of $150 million. Upon completion of the Phase II studies, Abbott will license the program for a one-time $200 million if the studies meet certain criteria. Abbott will assume sole responsibility for Phase III clinical development and global manufacturing.

Galapagos is eligible for $1 billion in milestone payments in addition to tiered double-digit royalties on sales upon commercialization. Galapagos will retain co-promotion rights in Belgium, the Netherlands and Luxembourg.

Abbott's diverse portfolio had cushioned it from some of the problems facing other large drug makers, like patent expirations and generic competition. Last month, Abbott reported fourth-quarter earnings rose 12% on improved profit margins, though sales were less than expected.

GLPG0634 is a highly selective inhibitor for enzymes that play a key role in the signaling mechanism used by several cytokines that are involved in autoimmune diseases. An additional Phase II dose-ranging finding study with the treatment is expected to begin soon.

Abbott shares closed at $57.04 Tuesday and were inactive premarket.

 
   -By Nathalie Tadena, Dow Jones Newswires; 212-416-3287; nathalie.tadena@dowjones.com 
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