Regulatory T cell therapies have been pursued as treatment for cancers, but Sonoma Biotherapeutics believes these cells can be harnessed to delivery lasting and potential curative treatments for autoimmune and degenerative diseases. We spoke to Jeff Bluestone, CEO of Sonoma, about regulatory T cell therapies, why they may have broad application in a range of conditions, and what challenges will need to be overcome to usher in an area of cell therapies beyond cancer.