Natural Killer (NK) cells express a range of receptors to activate or inhibit certain cellular behavior to kill cancer cells. In a group study it was found that by using TGFb-imprinting, NK cells are driven to a pro-inflammatory phenotype with hypersecretion of IFN-γ, TNF-α, and GM- CSF. These cells, now TGFbi, had decreased degrees of CD38 at both the RNA and the protein level. Studies performed by Drs. Dean Lee and Marcelo Pereira found that CD38 NK cells can be utilized to target CD38+ multiple myeloma patients and improve their progression-free survival by avoiding death of healthy surrounding cells, as well as enhancement of NK cell function.