AstraZeneca PLC’s Alexion unit has exercised an option to acquire the remaining equity in Caelum Biosciences, Inc. and get control of a promising late-stage candidate for the treatment of light chain (AL) amyloidosis, a rare, tough-to-treat protein misfolding disorder.
Alexion, acquired earlier this year by AstraZeneca for $39bn, first entered into a collaboration in 2019 with Caelum (and took...








