C6, but not D5, induced mitochondrial membrane depolarization in HER4 JMa/CYT1transfected BT549 cells (Figure6B), as observed with NRG1 (Figure3E)
C6, but not D5, induced mitochondrial membrane depolarization in HER4 JMa/CYT1transfected BT549 cells (Figure6B), as observed with NRG1 (Figure3E). trafficking to mitochondria with antiHER4 Abs to mimic NRG1 suppressor functions could be an alternative 5,6-Dihydrouridine anticancer strategy. Keywords:4ICD, antibody, cancer, HER4, neuregulin Neuregulin 1 (NRG1) induced cleavage of poly(ADPribose) polymerase (PARP) in human epidermal growth factor receptor 4 (HER4) JMa/CYT1expressing cancer cells. NRG1 favored HER4 intracellular domain (4ICD) cleavage and retention into mitochondria leading to reactive oxygen species (ROS) production through mitochondrial depolarization in HER4 JMa/CYT1expressing cancer cells. Phagedisplayed selected antiHER4 Ab C6 induced 4ICD 5,6-Dihydrouridine cleavage and retention into mitochondria, mimicking NRG1mediated effects on PARP cleavage, ROS production, and mitochondrial membrane depolarization. C6 Ab reduced in vivo growth of ovarian COV434 and breast HCC1187 tumor cell xenografts in nude…