Gade, PadmajaKimball, Amy S.DiNardo, Angela C.Gangwal, PriyamvadaRoss, Douglas D.Boswell, H. ScottKeay, Susan K.Kalvakolanu, Dhananjaya V.2018-03-152018-03-152016-10-14Gade, P., Kimball, A. S., DiNardo, A. C., Gangwal, P., Ross, D. D., Boswell, H. S., … Kalvakolanu, D. V. (2016). Death-associated Protein Kinase-1 Expression and Autophagy in Chronic Lymphocytic Leukemia Are Dependent on Activating Transcription Factor-6 and CCAAT/Enhancer-binding Protein-β. The Journal of Biological Chemistry, 291(42), 22030–22042. https://doi.org/10.1074/jbc.M116.7257960021-9258https://hdl.handle.net/1805/15578Expression of DAPK1, a critical regulator of autophagy and apoptosis, is lost in a wide variety of tumors, although the mechanisms are unclear. A transcription factor complex consisting of ATF6 (an endoplasmic reticulum-resident factor) and C/EBP-β is required for the IFN-γ-induced expression of DAPK1. IFN-γ-induced proteolytic processing of ATF6 and phosphorylation of C/EBP-β are obligatory for the formation of this transcriptional complex. We report that defects in this pathway fail to control growth of chronic lymphocytic leukemia (CLL). Consistent with these observations, IFN-γ and chemotherapeutics failed to activate autophagy in CLL patient samples lacking ATF6 and/or C/EBP-β. Together, these results identify a molecular basis for the loss of DAPK1 expression in CLL.en-USPublisher Policycell signalingcytokine actionendoplasmic reticulum stress (ER stress)transcription factortumor suppressor geneArticle