Image by National Institutes of Allergy and Infectious Diseases UC San Francisco scientists have discovered a new way to control the immune systemâs ânatural killerâ (NK) cells, a finding with implications for novel cell therapies and tissue implants that can evade immune rejection. The findings could also be used to enhance the ability of cancer immunotherapies to detect and destroy lurking tumors. The study, published Jan. 8, 2021, in the Journal of Experimental Medicine, addresses a major challenge for the field of regenerative medicine, said lead author Tobias Deuse, MD, the Julien I.E. Hoffman, MD, Endowed Chair in Cardiac Surgery in the UCSF Department of Surgery.Â