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Ridinger J, Koeneke E, Kolbinger FR, Koerholz K, Mahboobi S, Hellweg L, Gunkel N, Miller AK, Peterziel H, Schmezer P, Hamacher-Brady A, Witt O, Oehme I. Dual role of HDAC10 in lysosomal exocytosis and DNA repair promotes neuroblastoma chemoresistance. Sci Rep 2018; 8:10039. [PMID: 29968769 PMCID: PMC6030077 DOI: 10.1038/s41598-018-28265-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 06/15/2018] [Indexed: 12/19/2022] Open
Abstract
Drug resistance is a leading cause for treatment failure in many cancers, including neuroblastoma, the most common solid extracranial childhood malignancy. Previous studies from our lab indicate that histone deacetylase 10 (HDAC10) is important for the homeostasis of lysosomes, i.e. acidic vesicular organelles involved in the degradation of various biomolecules. Here, we show that depleting or inhibiting HDAC10 results in accumulation of lysosomes in chemotherapy-resistant neuroblastoma cell lines, as well as in the intracellular accumulation of the weakly basic chemotherapeutic doxorubicin within lysosomes. Interference with HDAC10 does not block doxorubicin efflux from cells via P-glycoprotein inhibition, but rather via inhibition of lysosomal exocytosis. In particular, intracellular doxorubicin does not remain trapped in lysosomes but also accumulates in the nucleus, where it promotes neuroblastoma cell death. Our data suggest that lysosomal exocytosis under doxorubicin treatment is important for cell survival and that inhibition of HDAC10 further induces DNA double-strand breaks (DSBs), providing additional mechanisms that sensitize neuroblastoma cells to doxorubicin. Taken together, we demonstrate that HDAC10 inhibition in combination with doxorubicin kills neuroblastoma, but not non-malignant cells, both by impeding drug efflux and enhancing DNA damage, providing a novel opportunity to target chemotherapy resistance.
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Affiliation(s)
- Johannes Ridinger
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,Faculty of Biosciences, University of Heidelberg, Heidelberg, Germany
| | - Emily Koeneke
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,University of Heidelberg, Heidelberg, Germany
| | - Fiona R Kolbinger
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - Katharina Koerholz
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - Siavosh Mahboobi
- Institute of Pharmacy, University of Regensburg, Regensburg, Germany
| | - Lars Hellweg
- Research Group Cancer Drug Development, German Cancer Research Center, Heidelberg, Germany
| | - Nikolas Gunkel
- Research Group Cancer Drug Development, German Cancer Research Center, Heidelberg, Germany
| | - Aubry K Miller
- Research Group Cancer Drug Development, German Cancer Research Center, Heidelberg, Germany
| | - Heike Peterziel
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - Peter Schmezer
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center, Heidelberg, Germany
| | - Anne Hamacher-Brady
- Johns Hopkins University, Bloomberg School of Public Health, Baltimore, United States
| | - Olaf Witt
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.,Department of Pediatric Oncology, Hematology and Immunology, University Hospital Heidelberg, Heidelberg, Germany
| | - Ina Oehme
- Preclinical Program, Hopp Children's Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany. .,Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), and German Cancer Consortium (DKTK), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany.
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Abstract
Proteins sequestered by a non-selective bulk process within the lysosomes turn over with an apparent half-life of about 8 minutes and this rapid lysosomal proteolysis is initiated by endopeptidases, in particular by the cathepsins D and L. We describe also the cathepsins B and H which show mainly exopeptidase and only low endopeptidase activity. Especially cathepsin H is most probably the only lysosomal aminopeptidase in many cell types. Additionally, the properties of other mammalian lysosomal endo- and exopeptidases are compared. Finally, we discuss some of the conditions for the action of lysosomal proteases as the low intralysosomal pH, the high part of lysosomal thiol groups and the absence of intralysosomal proteinase inhibitors.
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Affiliation(s)
- P Bohley
- Institute for Physiological Chemistry, University of Tübingen, Germany
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