Novartis is to take over Calypso Biotech BV, a portfolio company of Gilde Healthcare, a specialist investor based in the Netherlands. Calypso is a spin out of Merck KGaA and is researching and developing antibody therapeutics for a range of chronic autoimmune diseases by blocking interleukin-15 (IL-15). IL-15 is an immune axis that controls downstream immune cascades in many autoimmune diseases.