PMID- 27106131 OWN - NLM STAT- MEDLINE DCOM- 20171106 LR - 20210109 IS - 1878-0261 (Electronic) IS - 1574-7891 (Print) IS - 1574-7891 (Linking) VI - 10 IP - 7 DP - 2016 Aug TI - Combination therapy induces unfolded protein response and cytoskeletal rearrangement leading to mitochondrial apoptosis in prostate cancer. PG - 949-65 LID - S1574-7891(16)30014-X [pii] LID - 10.1016/j.molonc.2016.03.007 [doi] AB - Development of therapeutic resistance is responsible for most prostate cancer (PCa) related mortality. Resistance has been attributed to an acquired or selected cancer stem cell phenotype. Here we report the histone deacetylase inhibitor apicidin (APC) or ER stressor thapsigargin (TG) potentiate paclitaxel (TXL)-induced apoptosis in PCa cells and limit accumulation of cancer stem cells. TXL-induced responses were modulated in the presence of TG with increased accumulation of cells at G1-phase, rearrangement of the cytoskeleton, and changes in cytokine release. Cytoskeletal rearrangement was associated with modulation of the cytoplasmic and mitochondrial unfolded protein response leading to mitochondrial dysfunction and release of proapoptotic proteins from mitochondria. TXL in combination with APC or TG enhanced caspase activation. Importantly, TXL in combination with TG induced caspase activation and apoptosis in X-ray resistant LNCaP cells. Increased release of transforming growth factor-beta (TGF-beta) was observed while phosphorylated beta-catenin level was suppressed with TXL combination treatments. This was accompanied by a decrease in the CD44(+)CD133(+) cancer stem cell-like population, suggesting treatment affects cancer stem cell properties. Taken together, combination treatment with TXL and either APC or TG induces efficient apoptosis in both proliferating and cancer stem cells, suggesting this therapeutic combination may overcome drug resistance and recurrence in PCa. CI - Copyright (c) 2016 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved. FAU - Kumar, Sandeep AU - Kumar S AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Chaudhary, Ajay K AU - Chaudhary AK AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Kumar, Rahul AU - Kumar R AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - O'Malley, Jordan AU - O'Malley J AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Dubrovska, Anna AU - Dubrovska A AD - OncoRay-National Center for Radiation Research in Oncology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universitat Dresden and Helmholtz-Zentrum Dresden-Rossendorf, Fetscherstrasse, Dresden, Germany; German Cancer Consortium (DKTK) Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany. FAU - Wang, Xinjiang AU - Wang X AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Yadav, Neelu AU - Yadav N AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Goodrich, David W AU - Goodrich DW AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. FAU - Chandra, Dhyan AU - Chandra D AD - Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. Electronic address: dhyan.chandra@roswellpark.org. LA - eng GR - P30 CA016056/CA/NCI NIH HHS/United States GR - R01 CA160685/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20160331 PL - United States TA - Mol Oncol JT - Molecular oncology JID - 101308230 RN - 0 (HSP70 Heat-Shock Proteins) RN - 0 (Interleukin-8) RN - 0 (Peptides, Cyclic) RN - 0 (Reactive Oxygen Species) RN - 0 (Transforming Growth Factor beta) RN - 0 (apicidin) RN - 0 (beta Catenin) RN - 67526-95-8 (Thapsigargin) RN - 82115-62-6 (Interferon-gamma) RN - EC 3.4.22.- (Caspases) RN - EC 3.4.24.- (Matrix Metalloproteinases) RN - P88XT4IS4D (Paclitaxel) SB - IM MH - Antineoplastic Combined Chemotherapy Protocols/pharmacology/*therapeutic use MH - *Apoptosis/drug effects/radiation effects MH - Caspases/metabolism MH - Cell Cycle Checkpoints/drug effects/radiation effects MH - Cell Death/drug effects/radiation effects MH - Cell Line, Tumor MH - Cytoskeleton/drug effects/*metabolism/radiation effects MH - Enzyme Activation/drug effects MH - G1 Phase/drug effects/radiation effects MH - G2 Phase/drug effects/radiation effects MH - HSP70 Heat-Shock Proteins/metabolism MH - Humans MH - Interferon-gamma/metabolism MH - Interleukin-8/metabolism MH - Male MH - Matrix Metalloproteinases/metabolism MH - Membrane Potential, Mitochondrial/drug effects/radiation effects MH - Mitochondria/drug effects/*metabolism/radiation effects MH - Neoplastic Stem Cells/drug effects/metabolism/pathology/radiation effects MH - Paclitaxel MH - Peptides, Cyclic/pharmacology/therapeutic use MH - Phosphorylation/drug effects MH - Prostatic Neoplasms/*drug therapy/*metabolism/pathology/radiotherapy MH - Reactive Oxygen Species/metabolism MH - Thapsigargin/pharmacology/therapeutic use MH - Transforming Growth Factor beta/metabolism MH - *Unfolded Protein Response/drug effects/radiation effects MH - X-Rays MH - beta Catenin/metabolism PMC - PMC4972665 MID - NIHMS780222 OTO - NOTNLM OT - Anticancer drugs OT - Apoptosis OT - Combination therapy OT - Mitochondria OT - Prostate cancer OT - Unfolded protein response EDAT- 2016/04/24 06:00 MHDA- 2017/11/07 06:00 PMCR- 2016/08/01 CRDT- 2016/04/24 06:00 PHST- 2016/01/13 00:00 [received] PHST- 2016/03/13 00:00 [revised] PHST- 2016/03/23 00:00 [accepted] PHST- 2016/04/24 06:00 [entrez] PHST- 2016/04/24 06:00 [pubmed] PHST- 2017/11/07 06:00 [medline] PHST- 2016/08/01 00:00 [pmc-release] AID - S1574-7891(16)30014-X [pii] AID - MOL22016107949 [pii] AID - 10.1016/j.molonc.2016.03.007 [doi] PST - ppublish SO - Mol Oncol. 2016 Aug;10(7):949-65. doi: 10.1016/j.molonc.2016.03.007. Epub 2016 Mar 31.