In February 2012, AstraZeneca and Amgen announced a collaboration on treatments for inflammatory diseases. Then in April 2012, AstraZeneca acquired Ardea Biosciences, another biotechnology company, for $1.26 billion. In June 2012, AstraZeneca and Bristol Myers Squibb announced a two-stage deal for the joint acquisition of the biotechnology company Amylin Pharmaceuticals. It was agreed that Bristol Myers Squibb would acquire Amylin for $5.3 billion in cash and the assumption of $1.7 billion in debt, with AstraZeneca then paying $3.4 billion in cash to Bristol Myers Squibb, and Amylin being folded into an existing diabetes joint venture between AstraZeneca and Bristol Myers Squibb.