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Nguyen A, Dzulko M, Murr J, Yen Y, Schneider G, Krämer OH. Class 1 Histone Deacetylases and Ataxia-Telangiectasia Mutated Kinase Control the Survival of Murine Pancreatic Cancer Cells upon dNTP Depletion. Cells 2021; 10:2520. [PMID: 34685500 PMCID: PMC8534202 DOI: 10.3390/cells10102520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/13/2021] [Accepted: 09/18/2021] [Indexed: 12/20/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive disease with a dismal prognosis. Here, we show how an inhibition of de novo dNTP synthesis by the ribonucleotide reductase (RNR) inhibitor hydroxyurea and an inhibition of epigenetic modifiers of the histone deacetylase (HDAC) family affect short-term cultured primary murine PDAC cells. We used clinically relevant doses of hydroxyurea and the class 1 HDAC inhibitor entinostat. We analyzed the cells by flow cytometry and immunoblot. Regarding the induction of apoptosis and DNA replication stress, hydroxyurea and the novel RNR inhibitor COH29 are superior to the topoisomerase-1 inhibitor irinotecan which is used to treat PDAC. Entinostat promotes the induction of DNA replication stress by hydroxyurea. This is associated with an increase in the PP2A subunit PR130/PPP2R3A and a reduction of the ribonucleotide reductase subunit RRM2 and the DNA repair protein RAD51. We further show that class 1 HDAC activity promotes the hydroxyurea-induced activation of the checkpoint kinase ataxia-telangiectasia mutated (ATM). Unlike in other cell systems, ATM is pro-apoptotic in hydroxyurea-treated murine PDAC cells. These data reveal novel insights into a cytotoxic, ATM-regulated, and HDAC-dependent replication stress program in PDAC cells.
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Affiliation(s)
- Alexandra Nguyen
- Department of Toxicology, University Medical Center, Obere Zahlbacher Str. 67, 55131 Mainz, Germany; (A.N.); (M.D.)
| | - Melanie Dzulko
- Department of Toxicology, University Medical Center, Obere Zahlbacher Str. 67, 55131 Mainz, Germany; (A.N.); (M.D.)
| | - Janine Murr
- Medical Clinic and Polyclinic II, Klinikum rechts der Isar, Technical University Munich, 81675 München, Germany; (J.M.); (G.S.)
| | - Yun Yen
- Ph.D. Program for Cancer Biology and Drug Discovery, Taipei Medical University, 250 Wu Hsing Street, Taipei 110, Taiwan;
| | - Günter Schneider
- Medical Clinic and Polyclinic II, Klinikum rechts der Isar, Technical University Munich, 81675 München, Germany; (J.M.); (G.S.)
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Oliver H. Krämer
- Department of Toxicology, University Medical Center, Obere Zahlbacher Str. 67, 55131 Mainz, Germany; (A.N.); (M.D.)
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Ye Z, Li Y, Xie J, Feng Z, Yang X, Wu Y, Zhao K, Pu Y, Xu X, Zhu Z, Li W, Pan J, Chen W, Xing C. The Anti-Tumor Activity of Afatinib in Pancreatic Ductal Adenocarcinoma Cells. Anticancer Agents Med Chem 2021; 20:1447-1458. [PMID: 32384038 DOI: 10.2174/1871520620666200508090515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 02/16/2020] [Accepted: 03/04/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Pancreatic Ductal Adenocarcinoma (PDAC) is the most common form of pancreatic cancer and leading causes of pancreatic cancer death because of most PDAC patients with advanced unresectable disease at that time, which is remarkably resistant to all forms of chemotherapy and radiotherapy. OBJECTIVE PDAC increases the social and patient's family burden. However, the PDAC pathogenesis is not identified. We are trying to uncover the underlying mechanism in the future. METHODS In our research, the drug-resistant cell line was successfully induced in the vitro by progressive concentrations of Afatinib, which we named it as BxPC3-AR. RESULTS It has been observed that the effect of autophagy was on the resistance of BxPC3-AR to Afatinib. CONCLUSION It has been confirmed that autophagy plays a certain role in BxPC3-AR resistance to Afatinib. Our findings provide a new perspective on the role of autophagy in pancreatic ductal adenocarcinoma.
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Affiliation(s)
- Zhenyu Ye
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Yecheng Li
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Jiaming Xie
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Zhenyu Feng
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Xiaodong Yang
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Yong Wu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Kui Zhao
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Yuwei Pu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Xiangrong Xu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Zhaobi Zhu
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Wei Li
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Jun Pan
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Wei Chen
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Chungen Xing
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
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