Cytokines, which play an essential role in immune cell signaling, have long been recognized as having great therapeutic potential, but efforts to harness them have been hampered by their toxicity. Bonum Therapeutics is overcoming this limitation by engineering cytokines with a sensor domain that makes their activity dependent on their environment. While the company is focusing its efforts to develop regulated cytokine to treat cancer, it also has potential as an approach to autoimmune, metabolic, and other conditions. We spoke to Bonum Therapeutics Chief Scientific Officer Diane Hollenbaugh and Bonum Chief Business Officer Neela Patel about the therapeutic potential of cytokines, the challenges of using them as therapeutics, and why Bonum’s context-dependent cytokines may enable wider use of these proteins to treat a range of diseases