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Tao L, Xia X, Kong S, Wang T, Fan F, Wang W. Natural pentacyclic triterpenoid from Pristimerin sensitizes p53-deficient tumor to PARP inhibitor by ubiquitination of Chk1. Pharmacol Res 2024; 201:107091. [PMID: 38316371 DOI: 10.1016/j.phrs.2024.107091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 01/18/2024] [Accepted: 01/30/2024] [Indexed: 02/07/2024]
Abstract
Inhibition of checkpoint kinase 1 (Chk1) has shown to overcome resistance to poly (ADP-ribose) polymerase (PARP) inhibitors and expand the clinical utility of PARP inhibitors in a broad range of human cancers. Pristimerin, a naturally occurring pentacyclic triterpenoid, has been the focus of intensive studies for its anticancer potential. However, it is not yet known whether low dose of pristimerin can be combined with PARP inhibitors by targeting Chk1 signaling pathway. In this study, we investigated the efficacy, safety and molecular mechanisms of the synergistic effect produced by the combination olaparib and pristimerin in TP53-deficient and BRCA-proficient cell models. As a result, an increased expression of Chk1 was correlated with TP53 mutation, and pristimerin preferentially sensitized p53-defective cells to olaparib. The combination of olaparib and pristimerin resulted in a more pronounced abrogation of DNA synthesis and induction of DNA double-strand breaks (DSBs). Moreover, pristimerin disrupted the constitutional levels of Chk1 and DSB repair activities. Mechanistically, pristimerin promoted K48-linked polyubiquitination and proteasomal degradation of Chk1 while not affecting its kinase domain and activity. Importantly, combinatorial therapy led to a higher rate of tumor growth inhibition without apparent hematological toxicities. In addition, pristimerin suppressed olaparib-induced upregulation of Chk1 and enhanced olaparib-induced DSB marker γΗ2ΑΧ in vivo. Taken together, inhibition of Chk1 by pristimerin has been observed to induce DNA repair deficiency, which may expand the application of olaparib in BRCA-proficient cancers harboring TP53 mutations. Thus, pristimerin can be combined for PARP inhibitor-based therapy.
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Affiliation(s)
- Li Tao
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Xiangyu Xia
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Shujing Kong
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Tingye Wang
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Fangtian Fan
- Anhui Engineering Technology Research Center of Biochemical Pharmaceuticals, School of Pharmacy, Bengbu Medical College, Bengbu, Anhui 233003, China
| | - Weimin Wang
- The State Administration of Traditional Chinese Medicine Key Laboratory of Toxic Pathogens-Based Therapeutic Approaches of Gastric Cancer, Yangzhou University, Yangzhou, Jiangsu 225009, China; Department of Oncology, Yixing Hospital Affiliated to Medical College of Yangzhou University, Yixing, Jiangsu 214200, China.
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2
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Rabah N, Ait Mohand FE, Kravchenko-Balasha N. Understanding Glioblastoma Signaling, Heterogeneity, Invasiveness, and Drug Delivery Barriers. Int J Mol Sci 2023; 24:14256. [PMID: 37762559 PMCID: PMC10532387 DOI: 10.3390/ijms241814256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The most prevalent and aggressive type of brain cancer, namely, glioblastoma (GBM), is characterized by intra- and inter-tumor heterogeneity and strong spreading capacity, which makes treatment ineffective. A true therapeutic answer is still in its infancy despite various studies that have made significant progress toward understanding the mechanisms behind GBM recurrence and its resistance. The primary causes of GBM recurrence are attributed to the heterogeneity and diffusive nature; therefore, monitoring the tumor's heterogeneity and spreading may offer a set of therapeutic targets that could improve the clinical management of GBM and prevent tumor relapse. Additionally, the blood-brain barrier (BBB)-related poor drug delivery that prevents effective drug concentrations within the tumor is discussed. With a primary emphasis on signaling heterogeneity, tumor infiltration, and computational modeling of GBM, this review covers typical therapeutic difficulties and factors contributing to drug resistance development and discusses potential therapeutic approaches.
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Affiliation(s)
| | | | - Nataly Kravchenko-Balasha
- The Institute of Biomedical and Oral Research, Hebrew University of Jerusalem, Jerusalem 91120, Israel; (N.R.); (F.-E.A.M.)
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3
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Parvin S, Akter J, Takenobu H, Katai Y, Satoh S, Okada R, Haruta M, Mukae K, Wada T, Ohira M, Ando K, Kamijo T. ATM depletion induces proteasomal degradation of FANCD2 and sensitizes neuroblastoma cells to PARP inhibitors. BMC Cancer 2023; 23:313. [PMID: 37020276 PMCID: PMC10077671 DOI: 10.1186/s12885-023-10772-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 03/26/2023] [Indexed: 04/07/2023] Open
Abstract
BACKGROUND Genomic alterations, including loss of function in chromosome band 11q22-23, are frequently observed in neuroblastoma, which is the most common extracranial childhood tumour. In neuroblastoma, ATM, a DNA damage response-associated gene located on 11q22-23, has been linked to tumorigenicity. Genetic changes in ATM are heterozygous in most tumours. However, it is unclear how ATM is associated with tumorigenesis and cancer aggressiveness. METHODS To elucidate its molecular mechanism of action, we established ATM-inactivated NGP and CHP-134 neuroblastoma cell lines using CRISPR/Cas9 genome editing. The knock out cells were rigorously characterized by analyzing proliferation, colony forming abilities and responses to PARP inhibitor (Olaparib). Western blot analyses were performed to detect different protein expression related to DNA repair pathway. ShRNA lentiviral vectors were used to knockdown ATM expression in SK-N-AS and SK-N-SH neuroblastoma cell lines. ATM knock out cells were stably transfected with FANCD2 expression plasmid to over-expressed the FANCD2. Moreover, knock out cells were treated with proteasome inhibitor MG132 to determine the protein stability of FANCD2. FANCD2, RAD51 and γH2AX protein expressions were determined by Immunofluorescence microscopy. RESULTS Haploinsufficient ATM resulted in increased proliferation (p < 0.01) and cell survival following PARP inhibitor (olaparib) treatment. However, complete ATM knockout decreased proliferation (p < 0.01) and promoted cell susceptibility to olaparib (p < 0.01). Complete loss of ATM suppressed the expression of DNA repair-associated molecules FANCD2 and RAD51 and induced DNA damage in neuroblastoma cells. A marked downregulation of FANCD2 expression was also observed in shRNA-mediated ATM-knockdown neuroblastoma cells. Inhibitor experiments demonstrated that the degradation of FANCD2 was regulated at the protein level through the ubiquitin-proteasome pathway. Reintroduction of FANCD2 expression is sufficient to reverse decreased proliferation mediated by ATM depletion. CONCLUSIONS Our study revealed the molecular mechanism underlying ATM heterozygosity in neuroblastomas and elucidated that ATM inactivation enhances the susceptibility of neuroblastoma cells to olaparib treatment. These findings might be useful in the treatment of high-risk NB patients showing ATM zygosity and aggressive cancer progression in future.
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Affiliation(s)
- Sultana Parvin
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
- Laboratory of Tumor Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama, 338-8570, Japan
| | - Jesmin Akter
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Hisanori Takenobu
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Yutaka Katai
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Shunpei Satoh
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Ryu Okada
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
- Laboratory of Tumor Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama, 338-8570, Japan
| | - Masayuki Haruta
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Kyosuke Mukae
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Tomoko Wada
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Miki Ohira
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Kiyohiro Ando
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan
| | - Takehiko Kamijo
- Research Institute for Clinical Oncology, Saitama Cancer Center, 818 Komuro, Ina, Saitama, 362-0806, Japan.
- Laboratory of Tumor Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama, 338-8570, Japan.
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4
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Maksoud S. The DNA Double-Strand Break Repair in Glioma: Molecular Players and Therapeutic Strategies. Mol Neurobiol 2022; 59:5326-5365. [PMID: 35696013 DOI: 10.1007/s12035-022-02915-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 06/05/2022] [Indexed: 12/12/2022]
Abstract
Gliomas are the most frequent type of tumor in the central nervous system, which exhibit properties that make their treatment difficult, such as cellular infiltration, heterogeneity, and the presence of stem-like cells responsible for tumor recurrence. The response of this type of tumor to chemoradiotherapy is poor, possibly due to a higher repair activity of the genetic material, among other causes. The DNA double-strand breaks are an important type of lesion to the genetic material, which have the potential to trigger processes of cell death or cause gene aberrations that could promote tumorigenesis. This review describes how the different cellular elements regulate the formation of DNA double-strand breaks and their repair in gliomas, discussing the therapeutic potential of the induction of this type of lesion and the suppression of its repair as a control mechanism of brain tumorigenesis.
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Affiliation(s)
- Semer Maksoud
- Experimental Therapeutics and Molecular Imaging Unit, Department of Neurology, Neuro-Oncology Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA.
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5
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Hong Z, Liu T, Wan L, Fa P, Kumar P, Cao Y, Prasad CB, Qiu Z, Joseph L, Hongbing W, Li Z, Wang QE, Guo P, Guo D, Yilmaz AS, Lu L, Papandreou I, Jacob NK, Yan C, Zhang X, She QB, Ma Z, Zhang J. Targeting Squalene Epoxidase Interrupts Homologous Recombination via the ER Stress Response and Promotes Radiotherapy Efficacy. Cancer Res 2022; 82:1298-1312. [PMID: 35045984 PMCID: PMC8983553 DOI: 10.1158/0008-5472.can-21-2229] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 11/03/2021] [Accepted: 01/10/2022] [Indexed: 11/16/2022]
Abstract
Over 50% of all patients with cancer are treated with radiotherapy. However, radiotherapy is often insufficient as a monotherapy and requires a nontoxic radiosensitizer. Squalene epoxidase (SQLE) controls cholesterol biosynthesis by converting squalene to 2,3-oxidosqualene. Given that SQLE is frequently overexpressed in human cancer, this study investigated the importance of SQLE in breast cancer and non-small cell lung cancer (NSCLC), two cancers often treated with radiotherapy. SQLE-positive IHC staining was observed in 68% of breast cancer and 56% of NSCLC specimens versus 15% and 25% in normal breast and lung tissue, respectively. Importantly, SQLE expression was an independent predictor of poor prognosis, and pharmacologic inhibition of SQLE enhanced breast and lung cancer cell radiosensitivity. In addition, SQLE inhibition enhanced sensitivity to PARP inhibition. Inhibition of SQLE interrupted homologous recombination by suppressing ataxia-telangiectasia mutated (ATM) activity via the translational upregulation of wild-type p53-induced phosphatase (WIP1), regardless of the p53 status. SQLE inhibition and subsequent squalene accumulation promoted this upregulation by triggering the endoplasmic reticulum (ER) stress response. Collectively, these results identify a novel tumor-specific radiosensitizer by revealing unrecognized cross-talk between squalene metabolites, ER stress, and the DNA damage response. Although SQLE inhibitors have been used as antifungal agents in the clinic, they have not yet been used as antitumor agents. Repurposing existing SQLE-inhibiting drugs may provide new cancer treatments. SIGNIFICANCE Squalene epoxidase inhibitors are novel tumor-specific radiosensitizers that promote ER stress and suppress homologous recombination, providing a new potential therapeutic approach to enhance radiotherapy efficacy.
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Affiliation(s)
- Zhipeng Hong
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
- Department of Breast Surgery, Affiliated Quanzhou First Hospital of Fujian Medical University, Quanzhou, Fujian, 362000, P.R. China
| | - Tao Liu
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Lingfeng Wan
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Pengyan Fa
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Pankaj Kumar
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Yanan Cao
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, 40506, USA
| | - Chandra Bhushan Prasad
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Zhaojun Qiu
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Liu Joseph
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Wang Hongbing
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland, USA
| | - Zaibo Li
- Department of Pathology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Qi-En Wang
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Peixuan Guo
- Center for RNA Nanobiotechnology and Nanomedicine, The Ohio State University, Columbus, OH, USA
| | - Deliang Guo
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Ayse Selen Yilmaz
- Department of Biomedical Informatics, College of Medicine, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, USA
| | - Lanchun Lu
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Ioanna Papandreou
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Naduparambil K Jacob
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
| | - Chunhong Yan
- Georgia Cancer Center, Augusta University, Augusta, GA, USA
| | - Xiaoli Zhang
- Department of Biomedical Informatics, College of Medicine, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, USA
| | - Qing-Bai She
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, KY, 40506, USA
| | - Zhefu Ma
- Department Breast Surgery and Plastic Surgery, Cancer Hospital of China Medical University, 44 Xiaoheyan Road, Dadong District, Shenyang, 110042, China
- Department Breast & Thyroid Surgery, The First Affiliated Hospital, Sun Yat-sen University, No.58 of Zhongshan 2nd Road, Yuexiu District, Guangzhou, 510080, China
| | - Junran Zhang
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, OH, 43210, USA
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6
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Read GH, Bailleul J, Vlashi E, Kesarwala AH. Metabolic response to radiation therapy in cancer. Mol Carcinog 2022; 61:200-224. [PMID: 34961986 PMCID: PMC10187995 DOI: 10.1002/mc.23379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/01/2021] [Accepted: 12/01/2021] [Indexed: 11/11/2022]
Abstract
Tumor metabolism has emerged as a hallmark of cancer and is involved in carcinogenesis and tumor growth. Reprogramming of tumor metabolism is necessary for cancer cells to sustain high proliferation rates and enhanced demands for nutrients. Recent studies suggest that metabolic plasticity in cancer cells can decrease the efficacy of anticancer therapies by enhancing antioxidant defenses and DNA repair mechanisms. Studying radiation-induced metabolic changes will lead to a better understanding of radiation response mechanisms as well as the identification of new therapeutic targets, but there are few robust studies characterizing the metabolic changes induced by radiation therapy in cancer. In this review, we will highlight studies that provide information on the metabolic changes induced by radiation and oxidative stress in cancer cells and the associated underlying mechanisms.
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Affiliation(s)
- Graham H. Read
- Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Justine Bailleul
- Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Erina Vlashi
- Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, California
| | - Aparna H. Kesarwala
- Department of Radiation Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia
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7
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Sule A, Golding SE, Ahmad SF, Watson J, Ahmed MH, Kellogg GE, Bernas T, Koebley S, Reed JC, Povirk LF, Valerie K. ATM phosphorylates PP2A subunit A resulting in nuclear export and spatiotemporal regulation of the DNA damage response. Cell Mol Life Sci 2022; 79:603. [PMID: 36434396 PMCID: PMC9700600 DOI: 10.1007/s00018-022-04550-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 08/30/2022] [Accepted: 09/07/2022] [Indexed: 11/26/2022]
Abstract
Ataxia telangiectasia mutated (ATM) is a serine-threonine protein kinase and important regulator of the DNA damage response (DDR). One critical ATM target is the structural subunit A (PR65-S401) of protein phosphatase 2A (PP2A), known to regulate diverse cellular processes such as mitosis and cell growth as well as dephosphorylating many proteins during the recovery from the DDR. We generated mouse embryonic fibroblasts expressing PR65-WT, -S401A (cannot be phosphorylated), and -S401D (phospho-mimetic) transgenes. Significantly, S401 mutants exhibited extensive chromosomal aberrations, impaired DNA double-strand break (DSB) repair and underwent increased mitotic catastrophe after radiation. Both S401A and the S401D cells showed impaired DSB repair (nonhomologous end joining and homologous recombination repair) and exhibited delayed DNA damage recovery, which was reflected in reduced radiation survival. Furthermore, S401D cells displayed increased ERK and AKT signaling resulting in enhanced growth rate further underscoring the multiple roles ATM-PP2A signaling plays in regulating prosurvival responses. Time-lapse video and cellular localization experiments showed that PR65 was exported to the cytoplasm after radiation by CRM1, a nuclear export protein, in line with the very rapid pleiotropic effects observed. A putative nuclear export sequence (NES) close to S401 was identified and when mutated resulted in aberrant PR65 shuttling. Our study demonstrates that the phosphorylation of a single, critical PR65 amino acid (S401) by ATM fundamentally controls the DDR, and balances DSB repair quality, cell survival and growth by spatiotemporal PR65 nuclear-cytoplasmic shuttling mediated by the nuclear export receptor CRM1.
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Affiliation(s)
- Amrita Sule
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, 23298-0058, USA
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Sarah E Golding
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, 23298-0058, USA
| | - Syed F Ahmad
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, 23298-0058, USA
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - James Watson
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, 23298-0058, USA
| | - Mostafa H Ahmed
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Glen E Kellogg
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, VA, 23298, USA
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Tytus Bernas
- Department of Anatomy, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Sean Koebley
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Jason C Reed
- Department of Physics, Virginia Commonwealth University, Richmond, VA, 23298, USA
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Lawrence F Povirk
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, 23298, USA
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Kristoffer Valerie
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, 23298-0058, USA.
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, Richmond, VA, 23298, USA.
- Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, 23298, USA.
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8
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Comprehensive pharmacogenomics characterization of temozolomide response in gliomas. Eur J Pharmacol 2021; 912:174580. [PMID: 34678239 DOI: 10.1016/j.ejphar.2021.174580] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/11/2021] [Accepted: 10/18/2021] [Indexed: 01/11/2023]
Abstract
Recent developments in pharmacogenomics have created opportunities for predicting temozolomide response in gliomas. Temozolomide is the main first-line alkylating chemotherapeutic drug together with radiotherapy as standard treatments of high-risk gliomas after surgery. However, there are great individual differences in temozolomide response. Besides the heterogeneity of gliomas, pharmacogenomics relevant genetic polymorphisms can not only affect pharmacokinetics of temozolomide but also change anti-tumor effects of temozolomide. This review will summarize pharmacogenomic studies of temozolomide in gliomas which can lay the foundation to personalized chemotherapy.
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9
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Mani C, Tripathi K, Omy TR, Reedy M, Manne U, Palle K. GLI1-targeting drugs induce replication stress and homologous recombination deficiency and synergize with PARP-targeted therapies in triple negative breast cancer cells. Biochim Biophys Acta Mol Basis Dis 2021; 1868:166300. [PMID: 34748904 DOI: 10.1016/j.bbadis.2021.166300] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/20/2021] [Accepted: 11/03/2021] [Indexed: 01/20/2023]
Abstract
Triple negative breast cancer (TNBC), an aggressive and highly metastatic subtype of breast cancer. Glioma-associated oncogene 1 (GLI1) is a transcription factor and effector of the Hedgehog (Hh) signaling pathway, and is predictive of poor survival for TNBC patients. A nanostring DNA Damage Response (DDR) mRNA panel was used to identify GLI1-induced regulation of DDR genes. Western blots, immunohistochemistry and immunofluorescence were used to evaluate protein expression. Colony assays and mammosphere formation assays were utilized to assess survival of cancer cells. Flow cytometry analyses were employed to evaluate changes in the cell cycle profile, and DNA fiber assays were used to analyze alterations in replication dynamics in TNBC cells. The UALCAN portal and Ensemble programs were used for computational analysis of TCGA data. CompuSyn software was used to calculate combination index (CI) values to assess synergism in drug combination experiments. Inhibition of GLI1 in TNBC cells transcriptionally downregulate expression of FANCD2 and its foci formation, and causes a homologous recombination repair (HR) deficiency. As HR-deficient cancer cells are sensitive to PARP-targeted therapies, we evaluated a combination of the GLI1 inhibitor, GANT61, and a PARP inhibitor (olaparib) in TNBC cells. Combination of GANT61 and olaparib elevated DNA damage levels and these drug combinations caused synergistic lethality to TNBC cells. Aberrantly activated GLI1 regulates HR-mediated DNA repair by transcriptionally regulating FANCD2 to overcome chemotherapy-induced replication stress and DNA damage, and it contributes to resistance of TNBC cells to therapeutics.
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Affiliation(s)
- Chinnadurai Mani
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Kaushlendra Tripathi
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36904, USA
| | - Tasmin R Omy
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Mark Reedy
- Department of Obstetrics and Gynecology, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Komaraiah Palle
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA; Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
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10
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Banerjee D, Langberg K, Abbas S, Odermatt E, Yerramothu P, Volaric M, Reidenbach MA, Krentz KJ, Rubinstein CD, Brautigan DL, Abbas T, Gelfand BD, Ambati J, Kerur N. A non-canonical, interferon-independent signaling activity of cGAMP triggers DNA damage response signaling. Nat Commun 2021; 12:6207. [PMID: 34707113 PMCID: PMC8551335 DOI: 10.1038/s41467-021-26240-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 09/24/2021] [Indexed: 12/17/2022] Open
Abstract
Cyclic guanosine monophosphate-adenosine monophosphate (cGAMP), produced by cyclic GMP-AMP synthase (cGAS), stimulates the production of type I interferons (IFN). Here we show that cGAMP activates DNA damage response (DDR) signaling independently of its canonical IFN pathways. Loss of cGAS dampens DDR signaling induced by genotoxic insults. Mechanistically, cGAS activates DDR in a STING-TBK1-dependent manner, wherein TBK1 stimulates the autophosphorylation of the DDR kinase ATM, with the consequent activation of the CHK2-p53-p21 signal transduction pathway and the induction of G1 cell cycle arrest. Despite its stimulatory activity on ATM, cGAMP suppresses homology-directed repair (HDR) through the inhibition of polyADP-ribosylation (PARylation), in which cGAMP reduces cellular levels of NAD+; meanwhile, restoring NAD+ levels abrogates cGAMP-mediated suppression of PARylation and HDR. Finally, we show that cGAMP also activates DDR signaling in invertebrate species lacking IFN (Crassostrea virginica and Nematostella vectensis), suggesting that the genome surveillance mechanism of cGAS predates metazoan interferon-based immunity.
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Affiliation(s)
- Daipayan Banerjee
- Aravind Medical Research Foundation, Madurai, 625020, India
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Kurt Langberg
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Salar Abbas
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Eric Odermatt
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Praveen Yerramothu
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Martin Volaric
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA
| | - Matthew A Reidenbach
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA
| | - Kathy J Krentz
- Genome Editing & Animal Models Core, University of Wisconsin Biotechnology Center, Madison, WI, USA
| | - C Dustin Rubinstein
- Genome Editing & Animal Models Core, University of Wisconsin Biotechnology Center, Madison, WI, USA
| | - David L Brautigan
- Center for Cell Signaling, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Tarek Abbas
- Department of Radiation Oncology, University of Virginia, Charlottesville, VA, USA
| | - Bradley D Gelfand
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Biomedical Engineering, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Jayakrishna Ambati
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Pathology, University of Virginia, Charlottesville, VA, USA
| | - Nagaraj Kerur
- Center for Advanced Vision Science, University of Virginia School of Medicine, Charlottesville, VA, USA.
- Department of Ophthalmology, University of Virginia School of Medicine, Charlottesville, VA, USA.
- Carter Immunology Center, University of Virginia School of Medicine, Charlottesville, VA, USA.
- Department of Ophthalmology and Visual Sciences, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
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11
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Ban Q, Yang P, Chou SJ, Qiao L, Xia H, Xue J, Wang F, Xu X, Sun N, Zhang RY, Zhang C, Lee A, Liu W, Lin TY, Ko YL, Antovski P, Zhang X, Chiou SH, Lee CF, Hui W, Liu D, Jonas SJ, Weiss PS, Tseng HR. Supramolecular Nanosubstrate-Mediated Delivery for CRISPR/Cas9 Gene Disruption and Deletion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100546. [PMID: 34105245 PMCID: PMC8282741 DOI: 10.1002/smll.202100546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/30/2021] [Indexed: 06/12/2023]
Abstract
The clustered regularly interspaced short palindromic repeats (CRISPR)-associated protein 9 (CRISPR/Cas9) is an efficient and precise gene-editing technology that offers a versatile solution for establishing treatments directed at genetic diseases. Currently, CRISPR/Cas9 delivery into cells relies primarily on viral vectors, which suffer from limitations in packaging capacity and safety concerns. These issues with a nonviral delivery strategy are addressed, where Cas9•sgRNA ribonucleoprotein (RNP) complexes can be encapsulated into supramolecular nanoparticles (SMNP) to form RNP⊂SMNPs, which can then be delivered into targeted cells via supramolecular nanosubstrate-mediated delivery. Utilizing the U87 glioblastoma cell line as a model system, a variety of parameters for cellular-uptake of the RNP-laden nanoparticles are examined. Dose- and time-dependent CRISPR/Cas9-mediated gene disruption is further examined in a green fluorescent protein (GFP)-expressing U87 cell line (GFP-U87). The utility of an optimized SMNP formulation in co-delivering Cas9 protein and two sgRNAs that target deletion of exons 45-55 (708 kb) of the dystrophin gene is demonstrated. Mutations in this region lead to Duchenne muscular dystrophy, a severe genetic muscle wasting disease. Efficient delivery of these gene deletion cargoes is observed in a human cardiomyocyte cell line (AC16), induced pluripotent stem cells, and mesenchymal stem cells.
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Affiliation(s)
- Qian Ban
- School of Life Sciences, Center for Stem Cell and Translational Medicine, Anhui University, Hefei, 230601, China
| | - Peng Yang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Shih-Jie Chou
- Department of Medical Research, and Stem Cell Center, Division of Basic Research, Taipei Veterans General Hospital, Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, No. 155, Sec. 2, Linong Street 112, Taipei, Taiwan
| | - Li Qiao
- School of Life Sciences, Center for Stem Cell and Translational Medicine, Anhui University, Hefei, 230601, China
| | - Haidong Xia
- School of Life Sciences, Center for Stem Cell and Translational Medicine, Anhui University, Hefei, 230601, China
| | - Jingjing Xue
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Fang Wang
- Department of Macromolecular Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China
| | - Xiaobin Xu
- Department of Chemistry and Biochemistry, Department of Bioengineering, Department of Materials Science and Engineering, California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- School of Materials Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Na Sun
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ryan Y Zhang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ceng Zhang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Athena Lee
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Wenfei Liu
- Department of Chemistry and Biochemistry, Department of Bioengineering, Department of Materials Science and Engineering, California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ting-Yi Lin
- Department of Medical Research, and Stem Cell Center, Division of Basic Research, Taipei Veterans General Hospital, Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, No. 155, Sec. 2, Linong Street 112, Taipei, Taiwan
| | - Yu-Ling Ko
- Department of Medical Research, and Stem Cell Center, Division of Basic Research, Taipei Veterans General Hospital, Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, No. 155, Sec. 2, Linong Street 112, Taipei, Taiwan
| | - Petar Antovski
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xinyue Zhang
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Shih-Hwa Chiou
- Department of Medical Research, and Stem Cell Center, Division of Basic Research, Taipei Veterans General Hospital, Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, No. 155, Sec. 2, Linong Street 112, Taipei, Taiwan
| | - Chin-Fa Lee
- Department of Chemistry, i-Center for Advanced Science and Technology (iCAST), Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University (NCHU), 145 Xingda Road, South Dist., Taichung, 402, Taiwan
| | - Wenqiao Hui
- Anhui Province Key Laboratory of Livestock and Poultry Product Safety Engineering, Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agriculture Sciences, Hefei, 230031, China
| | - Dahai Liu
- School of Stomatology and Medicine, Foshan University, Foshan, 528000, China
| | - Steven J Jonas
- Department of Pediatrics, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Eli & Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Children's Discovery and Innovation Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Paul S Weiss
- Department of Chemistry and Biochemistry, Department of Bioengineering, Department of Materials Science and Engineering, California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hsian-Rong Tseng
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, California NanoSystems Institute (CNSI), Crump Institute for Molecular Imaging (CIMI), University of California, Los Angeles, Los Angeles, CA, 90095, USA
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12
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Ferreira WAS, Burbano RR, do Ó Pessoa C, Harada ML, do Nascimento Borges B, de Oliveira EHC. Pisosterol Induces G2/M Cell Cycle Arrest and Apoptosis via the ATM/ATR Signaling Pathway in Human Glioma Cells. Anticancer Agents Med Chem 2021; 20:734-750. [PMID: 32013837 DOI: 10.2174/1871520620666200203160117] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 11/05/2019] [Accepted: 12/19/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Pisosterol, a triterpene derived from Pisolithus tinctorius, exhibits potential antitumor activity in various malignancies. However, the molecular mechanisms that mediate the pisosterol-specific effects on glioma cells remain unknown. OBJECTIVE This study aimed to evaluate the antitumoral effects of pisosterol on glioma cell lines. METHODS The 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) and trypan blue exclusion assays were used to evaluate the effect of pisosterol on cell proliferation and viability in glioma cells. The effect of pisosterol on the distribution of the cells in the cell cycle was performed by flow cytometry. The expression and methylation pattern of the promoter region of MYC, ATM, BCL2, BMI1, CASP3, CDK1, CDKN1A, CDKN2A, CDKN2B, CHEK1, MDM2, p14ARF and TP53 was analyzed by RT-qPCR, western blotting and bisulfite sequencing PCR (BSP-PCR). RESULTS Here, it has been reported that pisosterol markedly induced G2/M arrest and apoptosis and decreased the cell viability and proliferation potential of glioma cells in a dose-dependent manner by increasing the expression of ATM, CASP3, CDK1, CDKN1A, CDKN2A, CDKN2B, CHEK1, p14ARF and TP53 and decreasing the expression of MYC, BCL2, BMI1 and MDM2. Pisosterol also triggered both caspase-independent and caspase-dependent apoptotic pathways by regulating the expression of Bcl-2 and activating caspase-3 and p53. CONCLUSION It has been, for the first time, confirmed that the ATM/ATR signaling pathway is a critical mechanism for G2/M arrest in pisosterol-induced glioma cell cycle arrest and suggests that this compound might be a promising anticancer candidate for further investigation.
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Affiliation(s)
- Wallax A S Ferreira
- Laboratorio de Cultura de Tecidos e Citogenetica, SAMAM, Instituto Evandro Chagas, Ananindeua, Para, Brazil
| | - Rommel R Burbano
- Laboratório de Citogenética Humana, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil.,Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém, Pará, Brazil.,Laboratório de Biologia Molecular, Hospital Ophir Loyola, Belém, Pará, Brazil
| | - Claudia do Ó Pessoa
- Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceara, Fortaleza, Ceara, Brazil
| | - Maria L Harada
- Laboratorio de Biologia Molecular Francisco Mauro Salzano, Instituto de Ciencias Biologicas, Universidade Federal do Para, Belem, Para, Brazil
| | - Bárbara do Nascimento Borges
- Laboratorio de Biologia Molecular Francisco Mauro Salzano, Instituto de Ciencias Biologicas, Universidade Federal do Para, Belem, Para, Brazil
| | - Edivaldo H Correa de Oliveira
- Laboratorio de Cultura de Tecidos e Citogenetica, SAMAM, Instituto Evandro Chagas, Ananindeua, Para, Brazil.,Instituto de Ciências Exatas e Naturais, Faculdade de Ciências Naturais, Universidade Federal do Pará, Belém, Pará, Brazil
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13
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Taher MM, Dairi G, Butt EM, Al-Quthami K, Al-Khalidi H, Jastania RA, Nageeti TH, Bogari NM, Athar M, Al-Allaf FA, Valerie K. EGFRvIII expression and isocitrate dehydrogenase mutations in patients with glioma. Oncol Lett 2020; 20:384. [PMID: 33193845 PMCID: PMC7656109 DOI: 10.3892/ol.2020.12247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 10/02/2020] [Indexed: 12/13/2022] Open
Abstract
Molecular pathology and personalized medicine are still being evolved in Saudi Arabia, and genetic testing for the detection of mutations as cancer markers have not been established in the diagnostics laboratories in Saudi Arabia. The aim of the present study was to determine the prevalence of isocitrate dehydrogenase (IDH1 and IDH2) mutations and epidermal growth factor receptor variant (EGFRv)III transcript expression in Saudi Arabian patients with glioma. Out of 117 brain tumors tested by reverse transcription-quantitative PCR for EGFRvIII, 41 cases tested positive. In the glioblastoma (GBM) category, 28/55 tumors were positive, in astrocytoma tumors 5/22, and in oligodendrogliomas 4/13 cases were positive respectively. EGFRvIII transcript was sequenced by capillary electrophoresis to demonstrate the presence of EGFRvIII-specific junction where exons 2–7 were deleted. In the present study 106 tumors were sequenced for IDH1 exon-4 mutations using the capillary sequencing method. The most common substitution missense mutation c.395G>A was found in 16 tumors. In the case of adamantinomatous craniopharyngioma, a novel missense mutation in c.472C>T was detected in IDH2 gene. Using next-generation sequencing (NGS), 74 tumors were sequenced for the IDH1 gene, and a total of 8 missense variants were identified in 36 tumors in a population of Saudi Arabia. The missense mutation (c.395G>A) was detected in 29/36 of tumors. A novel intronic mutation in c.414+9T>A was found in 13 cases in the IDH1 gene. In addition, one case exhibited a novel synonymous mutation in c.369A>G. Eleven tumors were found to have compound mutations in the IDH1 gene. In IDH2 gene, out of a total of 16 variants found in 6 out of 45 tumors, nine were missense, five were synonymous and one was intronic. This is the first report from Saudi Arabian laboratories analyzing glioma tumors for EGFRvIII expression, and the first study from Saudi Arabia to analyze IDH mutations in gliomas using the capillary and NGS methods.
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Affiliation(s)
- Mohiuddin M Taher
- Medical Genetics Department, College of Medicine, Umm-Al-Qura University, Makkah 24381, Saudi Arabia.,Science and Technology Unit, Umm-Al-Qura University, Makkah 24381, Saudi Arabia
| | - Ghida Dairi
- Medicine and Medical Sciences Research, Umm-Al-Qura University, Makkah 24381, Saudi Arabia.,Department of Physiology, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia
| | - Ejaz Muhammad Butt
- Department of Laboratory Medicine and Histopathology Division, Al-Noor Specialty Hospital, Makkah 24242, Saudi Arabia
| | - Khalid Al-Quthami
- Department of Laboratory Medicine and Histopathology Division, Al-Noor Specialty Hospital, Makkah 24242, Saudi Arabia
| | - Hisham Al-Khalidi
- Department of Pathology, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia
| | - Raid A Jastania
- Department of Pathology, College of Medicine, Umm-Al-Qura University, Makkah 24381, Saudi Arabia.,Department of Pathology, College of Medicine, King Abdul Aziz Medical City, Jeddah 21423, Saudi Arabia
| | - Tahani H Nageeti
- Radiation Oncology Department, King Abdullah Medical City, Makkah 24246, Saudi Arabia
| | - Neda M Bogari
- Medical Genetics Department, College of Medicine, Umm-Al-Qura University, Makkah 24381, Saudi Arabia
| | - Mohammad Athar
- Medical Genetics Department, College of Medicine, Umm-Al-Qura University, Makkah 24381, Saudi Arabia.,Science and Technology Unit, Umm-Al-Qura University, Makkah 24381, Saudi Arabia
| | - Faisal A Al-Allaf
- Medical Genetics Department, College of Medicine, Umm-Al-Qura University, Makkah 24381, Saudi Arabia.,Science and Technology Unit, Umm-Al-Qura University, Makkah 24381, Saudi Arabia
| | - Kristoffer Valerie
- Department of Radiation Oncology and Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA
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14
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Yang P, Chou SJ, Li J, Hui W, Liu W, Sun N, Zhang RY, Zhu Y, Tsai ML, Lai HI, Smalley M, Zhang X, Chen J, Romero Z, Liu D, Ke Z, Zou C, Lee CF, Jonas SJ, Ban Q, Weiss PS, Kohn DB, Chen K, Chiou SH, Tseng HR. Supramolecular nanosubstrate-mediated delivery system enables CRISPR-Cas9 knockin of hemoglobin beta gene for hemoglobinopathies. SCIENCE ADVANCES 2020; 6:6/43/eabb7107. [PMID: 33097539 PMCID: PMC7608838 DOI: 10.1126/sciadv.abb7107] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 09/09/2020] [Indexed: 05/02/2023]
Abstract
Leveraging the endogenous homology-directed repair (HDR) pathway, the CRISPR-Cas9 gene-editing system can be applied to knock in a therapeutic gene at a designated site in the genome, offering a general therapeutic solution for treating genetic diseases such as hemoglobinopathies. Here, a combined supramolecular nanoparticle (SMNP)/supramolecular nanosubstrate-mediated delivery (SNSMD) strategy is used to facilitate CRISPR-Cas9 knockin of the hemoglobin beta (HBB) gene into the adeno-associated virus integration site 1 (AAVS1) safe-harbor site of an engineered K562 3.21 cell line harboring the sickle cell disease mutation. Through stepwise treatments of the two SMNP vectors encapsulating a Cas9•single-guide RNA (sgRNA) complex and an HBB/green fluorescent protein (GFP)-encoding plasmid, CRISPR-Cas9 knockin was successfully achieved via HDR. Last, the HBB/GFP-knockin K562 3.21 cells were introduced into mice via intraperitoneal injection to show their in vivo proliferative potential. This proof-of-concept demonstration paves the way for general gene therapeutic solutions for treating hemoglobinopathies.
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Affiliation(s)
- Peng Yang
- Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Shih-Jie Chou
- Division of Basic Research, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jindian Li
- Molecular Imaging Center, Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033-9061, USA
| | - Wenqiao Hui
- Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agriculture Sciences, Hefei 230031, China
| | - Wenfei Liu
- Department of Chemistry and Biochemistry, Department of Bioengineering, Department of Materials Science and Engineering, and California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Na Sun
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ryan Y Zhang
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Yazhen Zhu
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ming-Long Tsai
- Division of Basic Research, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Henkie I Lai
- Division of Basic Research, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Matthew Smalley
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Xinyue Zhang
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jiayuan Chen
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Zulema Romero
- Department of Microbiology, Immunology and Molecular Genetics, DGSOM, Division of Pediatric Hematology-Oncology, Department of Pediatrics, David Geffen School of Medicine, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Dahai Liu
- School of Stomatology and Medicine, Foshan University, Foshan 528000, China
| | - Zunfu Ke
- Department of Pathology, Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Chang Zou
- Clinical Medical Research Center, The First Affiliated Hospital of Southern University, Shenzhen People's Hospital, Shenzhen 518020, China
| | - Chin-Fa Lee
- Department of Chemistry, i-Center for Advanced Science and Technology, Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University (NCHU), 145 Xingda Road, South Dist., Taichung 402, Taiwan
| | - Steven J Jonas
- Department of Pediatrics, David Geffen School of Medicine, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Children's Discovery and Innovation Institute, California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Qian Ban
- Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China.
| | - Paul S Weiss
- Department of Chemistry and Biochemistry, Department of Bioengineering, Department of Materials Science and Engineering, and California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Donald B Kohn
- Department of Microbiology, Immunology and Molecular Genetics, DGSOM, Division of Pediatric Hematology-Oncology, Department of Pediatrics, David Geffen School of Medicine, Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Kai Chen
- Molecular Imaging Center, Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033-9061, USA.
| | - Shih-Hwa Chiou
- Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan.
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Genomic Research Center, Academia Sinica, Taipei, Taiwan
| | - Hsian-Rong Tseng
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, CA 90095, USA.
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15
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Chou S, Yang P, Ban Q, Yang Y, Wang M, Chien C, Chen S, Sun N, Zhu Y, Liu H, Hui W, Lin T, Wang F, Zhang RY, Nguyen VQ, Liu W, Chen M, Jonas SJ, Weiss PS, Tseng H, Chiou S. Dual Supramolecular Nanoparticle Vectors Enable CRISPR/Cas9-Mediated Knockin of Retinoschisin 1 Gene-A Potential Nonviral Therapeutic Solution for X-Linked Juvenile Retinoschisis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903432. [PMID: 32440478 PMCID: PMC7237855 DOI: 10.1002/advs.201903432] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/07/2020] [Accepted: 03/08/2020] [Indexed: 05/13/2023]
Abstract
The homology-independent targeted integration (HITI) strategy enables effective CRISPR/Cas9-mediated knockin of therapeutic genes in nondividing cells in vivo, promising general therapeutic solutions for treating genetic diseases like X-linked juvenile retinoschisis. Herein, supramolecular nanoparticle (SMNP) vectors are used for codelivery of two DNA plasmids-CRISPR-Cas9 genome-editing system and a therapeutic gene, Retinoschisin 1 (RS1)-enabling clustered regularly interspaced short palindromic repeats (CRISPR)-associated protein 9 (CRISPR/Cas9) knockin of the RS1 gene with HITI. Through small-scale combinatorial screenings, two SMNP vectors, with Cas9 and single guide RNA (sgRNA)-plasmid in one and Donor-RS1 and green fluorescent protein (GFP)-plasmid in the other, with optimal delivery performances are identified. These SMNP vectors are then employed for CRISPR/Cas9 knockin of RS1/GFP genes into the mouse Rosa26 safe-harbor site in vitro and in vivo. The in vivo study involves intravitreally injecting the two SMNP vectors into the mouse eyes, followed by repeated ocular imaging by fundus camera and optical coherence tomography, and pathological and molecular analyses of the harvested retina tissues. Mice ocular organs retain their anatomical integrity, a single-copy 3.0-kb RS1/GFP gene is precisely integrated into the Rosa26 site in the retinas, and the integrated RS1/GFP gene is expressed in the retinas, demonstrating CRISPR/Cas9 knockin of RS1/GFP gene.
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Affiliation(s)
- Shih‐Jie Chou
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
| | - Peng Yang
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Qian Ban
- Center for Stem Cell and Translational MedicineSchool of Life SciencesAnhui UniversityHefei230601China
| | - Yi‐Ping Yang
- Department of Medical ResearchTaipei Veterans General HospitalTaipei112Taiwan
- School of Medicine, and School of Pharmaceutical SciencesNational Yang‐Ming UniversityTaipei112Taiwan
| | - Mong‐Lien Wang
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
- Department of Medical ResearchTaipei Veterans General HospitalTaipei112Taiwan
- Institute of Food Safety and Health Risk AssessmentNational Yang Ming UniversityTaipei112Taiwan
| | - Chian‐Shiu Chien
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
| | - Shih‐Jen Chen
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
| | - Na Sun
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Yazhen Zhu
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Hongtao Liu
- Shandong Provincial Qianfoshan Hospitalthe First Hospital Affiliated to Shandong First Medical UniversityJinan250014China
| | - Wenqiao Hui
- Institute of Animal Husbandry and Veterinary MedicineAnhui Academy of Agriculture SciencesHefei230031China
| | - Tai‐Chi Lin
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
| | - Fang Wang
- State Key Laboratory of Molecular Engineering of PolymersDepartment of Macromolecular ScienceFudan UniversityShanghai200433China
| | - Ryan Yue Zhang
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Viet Q. Nguyen
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
| | - Wenfei Liu
- Department of Chemistry and BiochemistryDepartment of BioengineeringDepartment of Materials Science and EngineeringCalifornia NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Mengxiang Chen
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Steve J. Jonas
- California NanoSystems Institute (CNSI)Department of PediatricsDavid Geffen School of MedicineEli & Edythe Broad Center of Regenerative Medicine and Stem Cell ResearchChildren's Discovery and Innovation InstituteUniversity of California, Los AngelesLos AngelesCA90095USA
| | - Paul S. Weiss
- Department of Chemistry and BiochemistryDepartment of BioengineeringDepartment of Materials Science and EngineeringCalifornia NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Hsian‐Rong Tseng
- Department of Molecular and Medical PharmacologyCrump Institute for Molecular Imaging (CIMI)California NanoSystems Institute (CNSI)University of California, Los AngelesLos AngelesCA90095USA
| | - Shih‐Hwa Chiou
- Division of Basic ResearchDepartment of Medical Researchand Department of OphthalmologyTaipei Veterans General HospitalTaipei112Taiwan
- Institute of PharmacologySchool of MedicineNational Yang‐Ming UniversityTaipei112Taiwan
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16
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Tang S, Li Z, Yang L, Shen L, Wang Y. A potential new role of ATM inhibitor in radiotherapy: suppressing ionizing Radiation-Activated EGFR. Int J Radiat Biol 2020; 96:461-468. [PMID: 31859574 PMCID: PMC7500639 DOI: 10.1080/09553002.2020.1707325] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/10/2019] [Accepted: 12/14/2019] [Indexed: 12/31/2022]
Abstract
Purpose: Although EGFR inhibitor (EGFRi) is used in cancer therapy to suppress tumor growth and resistance to treatment including radiotherapy, EGFRi resistance frequently developed, which significantly reduced treatment outcomes. Therefore, developing alternative approaches for EGFRi is of great importance. Based on our recent observation that ATM inhibitor (ATMi) efficiently inhibited ionizing radiation (IR)-induced EGFR activation in mouse embryo fibroblasts (MEF), the main purpose of this study is to determine whether ATMi could inhibit IR-induced EGFR activation in human tumor cell lines and explore its potential in EGFRi-alternative therapies.Materials and methods: We compared the effects of ATMi, EGFRi individually or in combination on IR-induced EGFR phosphorylation, cell growth and radio-sensitization in nine human tumor cell lines including lung adenocarcinoma (A549 and H358), glioblastoma (LN229), cervical cancer (HeLa), colorectal carcinoma (SW480 and HCT116) and nasopharygeal carcinoma (5-8 F, 6-10B and HK1) cell lines. In addition, we detected the effects of ATMi, EGFRi alone or both on the efficiency of non-homologous end-joining (NHEJ) and homologous recombination (HR) using I-SceI -GFP based NHEJ or HR reporter cell lines.Results: Compared to EGFRi treatment, ATMi treatment decreased IR-induced EGFR phosphorylation, suppressed growth and increased IR sensitization in tested cell lines at a similar or even more efficient level. Combining ATMi and EGFRi did not significantly increased the effects on these phenotypes as ATMi treatment alone. Also, similar to ATMi, EGFRi mainly reduced the efficiency of HR but not NHEJ although combining ATMi and EGFRi further inhibited the HR efficiency.Conclusions: Our study demonstrates that ATMi can function like EGFRi in human tumor cells to inhibit tumor cell growth and sensitize the tumor cells to IR, suggesting that ATMi treatment as an alternative approach may exert anticancer effects on EGFRi-resistant tumor cells and facilitate radiotherapy.
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Affiliation(s)
- Siyuan Tang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhentian Li
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - Lifang Yang
- Cancer Research Institute, School of Basic Medicine Science, Central South University, Changsha, China
| | - Liangfang Shen
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Ya Wang
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
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17
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Macieja A, Kopa P, Galita G, Pastwa E, Majsterek I, Poplawski T. Comparison of the effect of three different topoisomerase II inhibitors combined with cisplatin in human glioblastoma cells sensitized with double strand break repair inhibitors. Mol Biol Rep 2019; 46:3625-3636. [PMID: 31020489 DOI: 10.1007/s11033-019-04605-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/16/2019] [Indexed: 12/14/2022]
Abstract
Topoisomerase II (Topo2) inhibitors in combination with cisplatin represent a common treatment modality used for glioma patients. The main mechanism of their action involves induction of DNA double-strand breaks (DSBs). DSBs are repaired via the homology-dependent DNA repair (HRR) and non-homologous end-joining (NHEJ). Inhibition of the NHEJ or HRR pathway sensitizes cancer cells to the treatment. In this work, we investigated the effect of three Topo2 inhibitors-etoposide, NK314, or HU-331 in combination with cisplatin in the U-87 human glioblastoma cell line. Etoposide as well as NK314 inhibited Topo2 activity by stabilizing Topo2-DNA cleavable complexes whereas HU-331 inhibited the ATPase activity of Topo2 using a noncompetitive mechanism. To increase the effectiveness of the treatment, we combined cisplatin and Topo2 inhibitor treatment with DSB repair inhibitors (DRIs). The cells were sensitized with NHEJ inhibitor, NU7441, or the novel HRR inhibitor, YU238259, prior to drug treatment. All of the investigated Topo2 inhibitors in combination with cisplatin efficiently killed the U-87 cells. The most cytotoxic effect was observed for the cisplatin + HU331 treatment scheme and this effect was significantly increased when a DRI pretreatment was used; however, we did not observed DSBs. Therefore, the molecular mechanism of cytotoxicity caused by the cisplatin + HU331 treatment scheme is yet to be evaluated. We observed a concentration-dependent change in DSB levels and accumulation at the G2/M checkpoint and S-phase in glioma cells incubated with NK314/cisplatin and etoposide/cisplatin. In conclusion, in combination with cisplatin, HU331 is the most potent Topo2 inhibitor of human glioblastoma cells.
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Affiliation(s)
- Anna Macieja
- Department of Molecular Genetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, Lodz, 90-236, Poland.
| | - Paulina Kopa
- Department of Immunopathology, Medical University of Lodz, Żeligowskiego 7/9, Lodz, 90-752, Poland
| | - Grzegorz Galita
- Department of Molecular Genetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, Lodz, 90-236, Poland
| | - Elżbieta Pastwa
- Functional Genomics & Proteomics Unit, ITSI-Biosciences, 633, Napoleon Street, Johnstown, PA, 15901, USA
| | - Ireneusz Majsterek
- Department of Clinical Chemistry and Biochemistry, Faculty of Medicine, Medical University of Lodz, Hallera 1, Lodz, 90-647, Poland
| | - Tomasz Poplawski
- Department of Molecular Genetics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, Lodz, 90-236, Poland
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18
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Liu Y, Ji W, Shergalis A, Xu J, Delaney AM, Calcaterra A, Pal A, Ljungman M, Neamati N, Rehemtulla A. Activation of the Unfolded Protein Response via Inhibition of Protein Disulfide Isomerase Decreases the Capacity for DNA Repair to Sensitize Glioblastoma to Radiotherapy. Cancer Res 2019; 79:2923-2932. [PMID: 30996048 DOI: 10.1158/0008-5472.can-18-2540] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 03/08/2019] [Accepted: 04/11/2019] [Indexed: 12/20/2022]
Abstract
Patients with glioblastoma multiforme (GBM) survive on average 12 to 14 months after diagnosis despite surgical resection followed by radiotheraphy and temozolomide therapy. Intrinsic or acquired resistance to chemo- and radiotherapy is common and contributes to a high rate of recurrence. To investigate the therapeutic potential of protein disulfide isomerase (PDI) as a target to overcome resistance to chemoradiation, we developed a GBM tumor model wherein conditional genetic ablation of prolyl 4-hydroxylase subunit beta (P4HB), the gene that encodes PDI, can be accomplished. Loss of PDI expression induced the unfolded protein response (UPR) and decreased cell survival in two independent GBM models. Nascent RNA Bru-seq analysis of PDI-depleted cells revealed a decrease in transcription of genes involved in DNA repair and cell-cycle regulation. Activation of the UPR also led to a robust decrease in RAD51 protein expression as a result of its ubiquitination-mediated proteosomal degradation. Clonogenic survival assays demonstrated enhanced killing of GBM cells in response to a combination of PDI knockdown and ionizing radiation (IR) compared with either modality alone, which correlated with a decreased capacity to repair IR-induced DNA damage. Synergistic tumor control was also observed with the combination of PDI inhibition and IR in a mouse xenograft model compared with either single agent alone. These findings provide a strong rationale for the development of PDI inhibitors and their use in combination with DNA damage-inducing, standard-of-care therapies such as IR. SIGNIFICANCE: These findings identify PDIA1 as a therapeutic target in GBM by demonstrating efficacy of its inhibition in combination with radiotherapy through a novel mechanism involving downregulation of DNA repair genes.Graphical Abstract: http://cancerres.aacrjournals.org/content/canres/79/11/2923/F1.large.jpg.
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Affiliation(s)
- Yajing Liu
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan
| | - Wenbin Ji
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan
| | - Andrea Shergalis
- Department of Medicinal Chemistry, College of Pharmacy, and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Jiaqi Xu
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan.,Weill Cornell Graduate School of Medical Sciences, New York, New York
| | - Amy M Delaney
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan
| | - Andrew Calcaterra
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan
| | - Anupama Pal
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan
| | - Mats Ljungman
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan.,Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, Michigan
| | - Nouri Neamati
- Department of Medicinal Chemistry, College of Pharmacy, and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Alnawaz Rehemtulla
- Department of Radiation Oncology, University of Michigan Medical School and Rogel Cancer Center, Ann Arbor, Michigan.
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19
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Tang S, Liu B, Liu M, Li Z, Liu J, Wang H, Wang J, Oh YT, Shen L, Wang Y. Ionizing radiation-induced growth in soft agar is associated with miR-21 upregulation in wild-type and DNA double strand break repair deficient cells. DNA Repair (Amst) 2019; 78:37-44. [PMID: 30954901 DOI: 10.1016/j.dnarep.2019.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/21/2019] [Accepted: 03/22/2019] [Indexed: 12/19/2022]
Abstract
DNA double strand breaks (DSBs) are a severe threat to genome integrity and a potential cause of tumorigenesis, which is a multi-stage process and involves many factors including the mutation of oncogenes and tumor suppressors, some of which are transcribed microRNAs (miRNAs). Among more than 2000 known miRNAs, miR-21 is a unique onco-miRNA that is highly expressed in almost all types of human tumors and is associated with tumorigenesis through its multiple targets. However, it remains unclear whether there is any functional link between DSBs and miR-21 expression and, if so, does the link contribute to DSB-induced genomic instability/tumorigenesis. To address this question, we used DNA-PKcs-/- (deficient in non-homologous end-joining (NHEJ)) and Rad54-/- (deficient in homologous recombination repair (HRR)) mouse embryonic fibroblasts (MEFs) since NHEJ and HRR are the major pathways for DSB repair in mammalian cells. Our results indicate that levels of miR-21 are elevated in these DSB repair (DSBR) deficient cells, and ionizing radiation (IR) further increases these levels in both wild-type (WT) and DSBR-deficient cells. Interestingly, IR stimulated growth in soft agar and this effect was greatly reduced by blocking miR-21 expression in both WT and DSBR-deficient cells. Taken together, our results suggest that either IR or DSBR-deficient can lead to an upregulation of miR-21 levels and that miR-21 is associated with IR-induced cell growth in soft agar. These results may help our understanding of DSB-induced tumorigenesis and provide information that could facilitate the development of new strategies to prevent DSB-induced carcinogenesis.
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Affiliation(s)
- Siyuan Tang
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States; Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - Bailong Liu
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States; Department of Oncology, The First Norman Bethune Hospital of Jilin University, Changchun, China
| | - Min Liu
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States; Department of Oncology, The First Norman Bethune Hospital of Jilin University, Changchun, China
| | - Zhentian Li
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - Jiaqi Liu
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - Hongyan Wang
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - Jian Wang
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - You-Take Oh
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States
| | - Liangfang Shen
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China.
| | - Ya Wang
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, GA, United States.
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20
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Toulany M. Targeting DNA Double-Strand Break Repair Pathways to Improve Radiotherapy Response. Genes (Basel) 2019; 10:genes10010025. [PMID: 30621219 PMCID: PMC6356315 DOI: 10.3390/genes10010025] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/07/2018] [Accepted: 12/27/2018] [Indexed: 12/13/2022] Open
Abstract
More than half of cancer patients receive radiotherapy as a part of their cancer treatment. DNA double-strand breaks (DSBs) are considered as the most lethal form of DNA damage and a primary cause of cell death and are induced by ionizing radiation (IR) during radiotherapy. Many malignant cells carry multiple genetic and epigenetic aberrations that may interfere with essential DSB repair pathways. Additionally, exposure to IR induces the activation of a multicomponent signal transduction network known as DNA damage response (DDR). DDR initiates cell cycle checkpoints and induces DSB repair in the nucleus by non-homologous end joining (NHEJ) or homologous recombination (HR). The canonical DSB repair pathways function in both normal and tumor cells. Thus, normal-tissue toxicity may limit the targeting of the components of these two pathways as a therapeutic approach in combination with radiotherapy. The DSB repair pathways are also stimulated through cytoplasmic signaling pathways. These signaling cascades are often upregulated in tumor cells harboring mutations or the overexpression of certain cellular oncogenes, e.g., receptor tyrosine kinases, PIK3CA and RAS. Targeting such cytoplasmic signaling pathways seems to be a more specific approach to blocking DSB repair in tumor cells. In this review, a brief overview of cytoplasmic signaling pathways that have been reported to stimulate DSB repair is provided. The state of the art of targeting these pathways will be discussed. A greater understanding of the underlying signaling pathways involved in DSB repair may provide valuable insights that will help to design new strategies to improve treatment outcomes in combination with radiotherapy.
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Affiliation(s)
- Mahmoud Toulany
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tuebingen, Roentgenweg 11, 72076 Tuebingen, Germany.
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21
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Pearson SJ, Roy Sarkar T, McQueen CM, Elswood J, Schmitt EE, Wall SW, Scribner KC, Wyatt G, Barhoumi R, Behbod F, Rijnkels M, Porter WW. ATM-dependent activation of SIM2s regulates homologous recombination and epithelial-mesenchymal transition. Oncogene 2018; 38:2611-2626. [PMID: 30531838 PMCID: PMC6450754 DOI: 10.1038/s41388-018-0622-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 11/13/2018] [Accepted: 11/18/2018] [Indexed: 12/15/2022]
Abstract
There is increasing evidence that genomic instability is a prerequisite for cancer progression. Here we show that SIM2s, a member of the bHLH/PAS family of transcription factors, regulates DNA damage repair through enhancement of homologous recombination, and prevents epithelial mesenchymal transitions (EMT) in an ATM dependent manner. Mechanistically, we found that SIM2s interacts with ATM and is stabilized through ATM-dependent phosphorylation in response to ionizing radiation (IR). Once stabilized, SIM2s interacts with BRCA1 and supports RAD51 recruitment to the site of DNA damage. Loss of SIM2s through the introduction of shSIM2 or the mutation of SIM2s at one of the predicted ATM phosphorylation sites (S115) reduces homologous recombination efficiency through disruption of RAD51 recruitment, resulting in genomic instability and induction of EMT. The EMT induced by the mutation of S115 is characterized by a decrease in E-cadherin and an induction of the basal marker, K14, resulting in increased invasion and metastasis. Together, these results identify a novel player in the DNA damage repair pathway and provides a link in DCIS progression to IDC through loss of SIM2s, increased genomic instability, EMT and metastasis.
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Affiliation(s)
- Scott J Pearson
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Tapasree Roy Sarkar
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Cole M McQueen
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Jessica Elswood
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Emily E Schmitt
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Steven W Wall
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Kelly C Scribner
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Garhett Wyatt
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Rola Barhoumi
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Fariba Behbod
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Monique Rijnkels
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA
| | - Weston W Porter
- Department of Integrative Biosciences, College of Veterinary Medicine, Texas A&M University, College Station, TX, 77843, USA. .,Veterinary Integrative Biosciences, Texas A&M University, College of Veterinary Medicine, College Station, TX, 77843, USA.
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22
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Takagi M, Yoshida M, Nemoto Y, Tamaichi H, Tsuchida R, Seki M, Uryu K, Nishii R, Miyamoto S, Saito M, Hanada R, Kaneko H, Miyano S, Kataoka K, Yoshida K, Ohira M, Hayashi Y, Nakagawara A, Ogawa S, Mizutani S, Takita J. Loss of DNA Damage Response in Neuroblastoma and Utility of a PARP Inhibitor. J Natl Cancer Inst 2017; 109:4096548. [PMID: 29059438 DOI: 10.1093/jnci/djx062] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/13/2017] [Indexed: 11/14/2022] Open
Abstract
Background Neuroblastoma (NB) is the most common solid tumor found in children, and deletions within the 11q region are observed in 11% to 48% of these tumors. Notably, such tumors are associated with poor prognosis; however, little is known regarding the molecular targets located in 11q. Methods Genomic alterations of ATM , DNA damage response (DDR)-associated genes located in 11q ( MRE11A, H2AFX , and CHEK1 ), and BRCA1, BARD1, CHEK2, MDM2 , and TP53 were investigated in 45 NB-derived cell lines and 237 fresh tumor samples. PARP (poly [ADP-ribose] polymerase) inhibitor sensitivity of NB was investigated in in vitro and invivo xenograft models. All statistical tests were two-sided. Results Among 237 fresh tumor samples, ATM, MRE11A, H2AFX , and/or CHEK1 loss or imbalance in 11q was detected in 20.7% of NBs, 89.8% of which were stage III or IV. An additional 7.2% contained ATM rare single nucleotide variants (SNVs). Rare SNVs in DDR-associated genes other than ATM were detected in 26.4% and were mutually exclusive. Overall, samples with SNVs and/or copy number alterations in these genes accounted for 48.4%. ATM-defective cells are known to exhibit dysfunctions in homologous recombination repair, suggesting a potential for synthetic lethality by PARP inhibition. Indeed, 83.3% NB-derived cell lines exhibited sensitivity to PARP inhibition. In addition, NB growth was markedly attenuated in the xenograft group receiving PARP inhibitors (sham-treated vs olaprib-treated group; mean [SD] tumor volume of sham-treated vs olaprib-treated groups = 7377 [1451] m 3 vs 298 [312] m 3 , P = .001, n = 4). Conclusions Genomic alterations of DDR-associated genes including ATM, which regulates homologous recombination repair, were observed in almost half of NBs, suggesting that synthetic lethality could be induced by treatment with a PARP inhibitor. Indeed, DDR-defective NB cell lines were sensitive to PARP inhibitors. Thus, PARP inhibitors represent candidate NB therapeutics.
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Affiliation(s)
- Masatoshi Takagi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Misa Yoshida
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Yoshino Nemoto
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Hiroyuki Tamaichi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Rika Tsuchida
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Masafumi Seki
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Kumiko Uryu
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Rina Nishii
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Satoshi Miyamoto
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Masahiro Saito
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Ryoji Hanada
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Hideo Kaneko
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Satoru Miyano
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Keisuke Kataoka
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Kenichi Yoshida
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Miki Ohira
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Yasuhide Hayashi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Akira Nakagawara
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Seishi Ogawa
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Shuki Mizutani
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
| | - Junko Takita
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan; Department of Pediatrics, Graduate School of Medicine, Laboratory of DNA Information Analysis, Human Genome Center, Institute of Medical Science, Laboratory of Sequence Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Department of Pediatrics and Adolescent Medicine, School of Medicine, Juntendo University, Tokyo, Japan; Department of Pediatric Hematology/Oncology, Saitama Children's Medical Center, Saitama, Japan, Department of Pediatrics, Nagara Medical Center, Gifu, Japan; Department of Pathology and Tumor Biology, Kyoto University, Kyoto, Japan; Division of Cancer Genomics, Saitama Cancer Center Research Institute, Saitama, Japan; Division of Cancer Genomics, Chiba Cancer Center, Chiba, Japan; Gunma Children's Medical Center, Gunma, Japan; Saga Medical Center, Saga, Japan
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23
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Annovazzi L, Mellai M, Schiffer D. Chemotherapeutic Drugs: DNA Damage and Repair in Glioblastoma. Cancers (Basel) 2017; 9:E57. [PMID: 28587121 PMCID: PMC5483876 DOI: 10.3390/cancers9060057] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/10/2017] [Accepted: 05/22/2017] [Indexed: 11/16/2022] Open
Abstract
Despite improvements in therapeutic strategies, glioblastoma (GB) remains one of the most lethal cancers. The presence of the blood-brain barrier, the infiltrative nature of the tumor and several resistance mechanisms account for the failure of current treatments. Distinct DNA repair pathways can neutralize the cytotoxicity of chemo- and radio-therapeutic agents, driving resistance and tumor relapse. It seems that a subpopulation of stem-like cells, indicated as glioma stem cells (GSCs), is responsible for tumor initiation, maintenance and recurrence and they appear to be more resistant owing to their enhanced DNA repair capacity. Recently, attention has been focused on the pivotal role of the DNA damage response (DDR) in tumorigenesis and in the modulation of therapeutic treatment effects. In this review, we try to summarize the knowledge concerning the main molecular mechanisms involved in the removal of genotoxic lesions caused by alkylating agents, emphasizing the role of GSCs. Beside their increased DNA repair capacity in comparison with non-stem tumor cells, GSCs show a constitutive checkpoint expression that enables them to survive to treatments in a quiescent, non-proliferative state. The targeted inhibition of checkpoint/repair factors of DDR can contribute to eradicate the GSC population and can have a great potential therapeutic impact aiming at sensitizing malignant gliomas to treatments, improving the overall survival of patients.
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Affiliation(s)
- Laura Annovazzi
- Research Center, Policlinico di Monza Foundation, Via Pietro Micca 29, 13100 Vercelli, Italy.
| | - Marta Mellai
- Research Center, Policlinico di Monza Foundation, Via Pietro Micca 29, 13100 Vercelli, Italy.
| | - Davide Schiffer
- Research Center, Policlinico di Monza Foundation, Via Pietro Micca 29, 13100 Vercelli, Italy.
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24
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Schrock MS, Batar B, Lee J, Druck T, Ferguson B, Cho JH, Akakpo K, Hagrass H, Heerema NA, Xia F, Parvin JD, Aldaz CM, Huebner K. Wwox-Brca1 interaction: role in DNA repair pathway choice. Oncogene 2017; 36:2215-2227. [PMID: 27869163 PMCID: PMC5398941 DOI: 10.1038/onc.2016.389] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 08/31/2016] [Accepted: 09/12/2016] [Indexed: 02/08/2023]
Abstract
In this study, loss of expression of the fragile site-encoded Wwox protein was found to contribute to radiation and cisplatin resistance of cells, responses that could be associated with cancer recurrence and poor outcome. WWOX gene deletions occur in a variety of human cancer types, and reduced Wwox protein expression can be detected early during cancer development. We found that Wwox loss is followed by mild chromosome instability in genomes of mouse embryo fibroblast cells from Wwox-knockout mice. Human and mouse cells deficient for Wwox also exhibit significantly enhanced survival of ionizing radiation and bleomycin treatment, agents that induce double-strand breaks (DSBs). Cancer cells that survive radiation recur more rapidly in a xenograft model of irradiated breast cancer cells; Wwox-deficient cells exhibited significantly shorter tumor latencies vs Wwox-expressing cells. This Wwox effect has important consequences in human disease: in a cohort of cancer patients treated with radiation, Wwox deficiency significantly correlated with shorter overall survival times. In examining mechanisms underlying Wwox-dependent survival differences, we found that Wwox-deficient cells exhibit enhanced homology directed repair (HDR) and decreased non-homologous end-joining (NHEJ) repair, suggesting that Wwox contributes to DNA DSB repair pathway choice. Upon silencing of Rad51, a protein critical for HDR, Wwox-deficient cells were resensitized to radiation. We also demonstrated interaction of Wwox with Brca1, a driver of HDR, and show via immunofluorescent detection of repair proteins at ionizing radiation-induced DNA damage foci that Wwox expression suppresses DSB repair at the end-resection step of HDR. We propose a genome caretaker function for WWOX, in which Brca1-Wwox interaction supports NHEJ as the dominant DSB repair pathway in Wwox-sufficient cells. Taken together, the experimental results suggest that reduced Wwox expression, a common occurrence in cancers, dysregulates DSB repair, enhancing efficiency of likely mutagenic repair, and enabling radiation and cisplatin treatment resistance.
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Affiliation(s)
- M S Schrock
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - B Batar
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - J Lee
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA
| | - T Druck
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - B Ferguson
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA
| | - J H Cho
- Department of Radiation Oncology and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - K Akakpo
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - H Hagrass
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - N A Heerema
- Department of Pathology and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - F Xia
- Department of Radiation Oncology and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - J D Parvin
- Division of Computational Biology and Bioinformatics, Department of Biomedical Informatics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - C M Aldaz
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX, USA
| | - K Huebner
- Department of Cancer Biology and Genetics and Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, Columbus, OH, USA
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25
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Beckta JM, Adams BR, Valerie K. DNA Damage Response in Human Stem Cells and Neural Descendants. Methods Mol Biol 2017; 1599:375-390. [PMID: 28477133 DOI: 10.1007/978-1-4939-6955-5_27] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Glial cells are crucial for the normal function of neurons and are intricately involved in the pathogenesis of neurodegenerative diseases as well as neurologic malignancies. A deeper understanding of the mechanisms by which glial cells influence the development of such pathologies will undoubtedly lead to new and improved therapeutic approaches. Commercially available human embryonic stem cells (hESCs) and induced pluripotent stem cells (iPSCs), both of which can be differentiated into neural progenitors (NPs) and various neural cell lineages, have become widely used as sources for producing normal human central nervous system (CNS) cells. A better understanding of the DNA damage response (DDR) that occurs in these cells after therapeutic ionizing radiation (IR) and chemotherapy is essential for assessing the effects on healthy human brain.Neurodegenerative features associated with conditions such as ataxia telangiectasia and Nijmegen breakage syndrome highlight the importance of DNA double strand break (DSB) repair pathways in maintaining genomic integrity in cells of the CNS. Similarly, the development of brain tumors is also intricately linked to DNA repair. The importance of ATM and the other phosphatidylinositol 3-kinase-related kinase (PIKK) family members, ATR and DNA-PKcs, is not fully defined in either CNS developmental or pathological states. While their roles are relatively well established in the DDR of proliferating cells, our recent work has demonstrated that these processes exhibit spatiotemporal evolution during cell differentiation. This chapter discusses and explores various laboratory techniques for investigating the role of ATM in hESCs and differentiated neural cells.
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Affiliation(s)
- Jason M Beckta
- Department of Radiation Oncology and the Massey Cancer Center, Virginia Commonwealth University, 401 College Street, Richmond, VA, 23298-0058, USA.,Yale University School of Medicine, New Haven, CT, USA
| | - Bret R Adams
- Department of Radiation Oncology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Kristoffer Valerie
- Department of Radiation Oncology and the Massey Cancer Center, Virginia Commonwealth University, 401 College Street, Richmond, VA, 23298-0058, USA.
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26
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DNA damage and Repair Modify DNA methylation and Chromatin Domain of the Targeted Locus: Mechanism of allele methylation polymorphism. Sci Rep 2016; 6:33222. [PMID: 27629060 PMCID: PMC5024116 DOI: 10.1038/srep33222] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 08/23/2016] [Indexed: 11/08/2022] Open
Abstract
We characterize the changes in chromatin structure, DNA methylation and transcription during and after homologous DNA repair (HR). We find that HR modifies the DNA methylation pattern of the repaired segment. HR also alters local histone H3 methylation as well chromatin structure by inducing DNA-chromatin loops connecting the 5' and 3' ends of the repaired gene. During a two-week period after repair, transcription-associated demethylation promoted by Base Excision Repair enzymes further modifies methylation of the repaired DNA. Subsequently, the repaired genes display stable but diverse methylation profiles. These profiles govern the levels of expression in each clone. Our data argue that DNA methylation and chromatin remodelling induced by HR may be a source of permanent variation of gene expression in somatic cells.
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27
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Zeng YC, Xing R, Zeng J, Xue M, Chi F, Xin Y, Fan GL, Wang HM, Duan QY, Sun YN, Niu N, Wu R. Sodium glycididazole enhances the radiosensitivity of laryngeal cancer cells through downregulation of ATM signaling pathway. Tumour Biol 2015; 37:5869-78. [PMID: 26586399 DOI: 10.1007/s13277-015-4278-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/19/2015] [Indexed: 01/05/2023] Open
Abstract
The purpose of this study was to evaluate the radiation-enhancing effect of sodium glycididazole, and the corresponding mechanisms of action on laryngeal cancer cells. Two laryngeal cancer cell lines (Hep-2 and UT-SCC-19A) were irradiated with X-rays in the presence or absence of sodium glycididazole. Cell survival, DNA damage and repair, cell apoptosis, cell cycle distribution, expression of proteins related to cell cycle checkpoint, and apoptosis were measured. Significantly increased DNA damages, decreased cells in the G1 phase, arrested cells at G2/M phase, decreased DNA repair protein XRCC1 foci formation, and enhanced cell apoptosis were observed in laryngeal cell lines treated by sodium glycididazole combined with irradiation compared with the irradiation alone. The combined treatment downregulated the protein expressions of ataxia-telangiectasia mutated (ATM), p-ATM, CHK2, and P53 but upregulated the protein expressions of MDM2 and Cdk2. This study indicates that sodium glycididazole enhances the radiosensitivity of laryngeal cancer cells through downregulation of ATM signaling pathway in vitro and in vivo.
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Affiliation(s)
- Yue-Can Zeng
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Rui Xing
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Jing Zeng
- Department of Radiation Oncology, University of Washington School of Medicine, Seattle, WA, USA
| | - Ming Xue
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Feng Chi
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Yan Xin
- Cancer Institute, No.1 Hospital of China Medical University, Shenyang, 110001, China
| | - Guo-Liang Fan
- Department of Otorhinolaryngology, Harbin First Hospital, 151, Diduan Street, Harbin, 150010, China
| | - Hong-Mei Wang
- Department of Radiation Oncology, Nanfang Hospital of Southern Medical University, Guangzhou, 510515, China
| | - Qiong-Yu Duan
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Yu-Nan Sun
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Nan Niu
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China
| | - Rong Wu
- Department of Medical Oncology, Cancer Center, Shengjing Hospital of China Medical University, 39 Huaxiang Road, Shenyang, 110022, China.
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28
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Liu M, Lee S, Liu B, Wang H, Dong L, Wang Y. Ku-dependent non-homologous end-joining as the major pathway contributes to sublethal damage repair in mammalian cells. Int J Radiat Biol 2015; 91:867-871. [PMID: 26189733 DOI: 10.3109/09553002.2015.1075178] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE Sublethal damage repair (SLDR) is a type of repair that occurs in split-dose irradiated cells, which was discovered more than 50 years ago. However, due to conflicting reported data, it remains unclear which DNA double-strand break (DSB) repair pathway, non-homologous end-joining (NHEJ) repair, homologous recombination repair (HRR) or both, contributes to SLDR, particularly in human cells. We were interested in clarifying this question. METHODS AND MATERIALS Mammalian cell lines, including human, mouse and Chinese hamster ovary (CHO) cell lines, wild type, deficient in NHEJ or HRR were irradiated with either single dose or two split doses at 2- or 4-h intervals. The clonogenic assay was used to evaluate these cell radiosensitivities. RESULTS All wild-type or HRR-deficient cells (including human, mouse and CHO cells) showed a higher survival rate after exposure to split-dose versus single-dose radiation; however, all classical NHEJ-deficient cells (including human, mouse and hamster cells) did not show any apparent sensitivity changes between single-dose and split-dose irradiation. CONCLUSION Classical NHEJ mainly contributes to SLDR in mammalian cells (including human cells). These results have the potential to improve radiotherapy.
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Affiliation(s)
- Min Liu
- Department of Radiation Oncology, the First Hospital, Jilin University, Changchun, 130021, China.,Department of Radiation Oncology, School of Medicine and the Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
| | - Solah Lee
- Department of Radiation Oncology, School of Medicine and the Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
| | - Bailong Liu
- Department of Radiation Oncology, the First Hospital, Jilin University, Changchun, 130021, China.,Department of Radiation Oncology, School of Medicine and the Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
| | - Hongyan Wang
- Department of Radiation Oncology, School of Medicine and the Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
| | - Lihua Dong
- Department of Radiation Oncology, the First Hospital, Jilin University, Changchun, 130021, China
| | - Ya Wang
- Department of Radiation Oncology, School of Medicine and the Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
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29
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Liu H, Yang W, Gao H, Jiang T, Gu B, Dong Q, Xu W, Wu S, Sun X. Nimotuzumab abrogates acquired radioresistance of KYSE-150R esophageal cancer cells by inhibiting EGFR signaling and cellular DNA repair. Onco Targets Ther 2015; 8:509-18. [PMID: 25750543 PMCID: PMC4348136 DOI: 10.2147/ott.s76958] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Background Acquired radioresistance of cancer is common after repeated irradiation and often leads to treatment failure. This study aimed to examine the effects of nimotuzumab on acquired radioresistance in human esophageal carcinoma cells and to investigate its underlying mechanisms. Methods The radioresistant human esophageal carcinoma cell line KYSE-150R was generated by using fractionated irradiation. KYSE-150R cells were pretreated with or without nimotuzumab before ionizing radiation. Cell growth and colony formation were measured to quantitate the effects of radiation. The γ-H2AX foci assay was employed to determine cellular DNA-repairing capacity. The phosphorylation of key molecules involved in the epidermal growth factor receptor (EGFR) signaling pathway and cellular DNA repair was measured by Western blot analysis. Results Nimotuzumab enhanced radiation-induced inhibition on cell growth and clonogenic survival in KYSE-150R cells. The average number of γ-H2AX foci increased in the irradiated cells treated with nimotuzumab. Nimotuzumab inhibited phosphorylation of the EGFR and its downstream molecules AKT and ERK. Phosphorylation of the DNA repair-related proteins DNA-PKcs, ATM, and RAD51 was also inhibited by nimotuzumab. Conclusions These results indicate that nimotuzumab can inhibit key cancer survival mechanisms, the EGFR signaling pathway, and DNA repair and thereby reverse acquired radioresistance in KYSE-150R cell line.
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Affiliation(s)
- Hai Liu
- Department of Radiation Oncology, Sir Run Run Shaw Hospital, Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou, People's Republic of China
| | - Weifang Yang
- Department of Radiation Oncology, Laboratory of Cellular and Molecular Radiation Oncology, Taizhou Hospital, Wenzhou Medical College, Taizhou, People's Republic of China
| | - Huaping Gao
- Department of Pharmacy, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Tingting Jiang
- Department of Radiation Oncology, Sir Run Run Shaw Hospital, Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou, People's Republic of China
| | - Bengxin Gu
- Department of Radiation Oncology, Sir Run Run Shaw Hospital, Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou, People's Republic of China
| | - Qinghua Dong
- Biomedical Research Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Wenhong Xu
- Department of Radiation Oncology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, People's Republic of China
| | - Shixiu Wu
- Department of Radiation Oncology, Hangzhou Cancer Hospital, Wushan District, Hangzhou First People's Hospital, Hangzhou, People's Republic of China
| | - Xiaonan Sun
- Department of Radiation Oncology, Sir Run Run Shaw Hospital, Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou, People's Republic of China
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30
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Shi L, Fei X, Sun G, Wang Z, Wan Y, Zeng Y, Guo J. Hypothermia stimulates glioma stem spheres to spontaneously dedifferentiate adjacent non-stem glioma cells. Cell Mol Neurobiol 2014; 35:217-30. [PMID: 25228266 DOI: 10.1007/s10571-014-0114-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 09/04/2014] [Indexed: 12/12/2022]
Abstract
Current models of stem cell biology assume that glioma stem cells reside at the apices of hierarchies and differentiate into non-stem progeny in a unidirectional manner. However, here we found an opposite phenomenon that glioma stem spheres could induce adjacent non-stem glioma cells to spontaneously dedifferentiate into stem-like cells in low temperature condition. In low temperature condition, it has been reported that mild hypothermia could induce pluripotent stem cells in hESC and iPSC. However, till now, its effects on glioma stem cells were still unknown. In this study, tracking the non-stem cells, we found that they could be attracted by stem spheres, and finally enter the stem spheres to become a member of stem spheres in vitro. However, these induced stem-like cells positive of CD133 and Nestin markers could not form an obvious sphere. To better understand the genetic differences of the stem spheres and stem-like cells underlying the change of microenvironment, we carried out Cytokine antibody array, Cancer PathwayFinder PCR array, and miRNA chip array, which demonstrated that lots of cytokines, mRNAs, and miRNAs involved in this microenvironmental change. In this study, the most important discovery by us was that we found GSCs sphere cores, which has been found to have strong proliferative capacity, and be able to 100 % form a big GSCs sphere. We hope these findings can change our past concepts, and be help to the further research on gliomas stem cells, and GSCs sphere cores can be defined as the primitive stem cells for further research.
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Affiliation(s)
- Lei Shi
- Department of Neurosurgery, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, 215300, People's Republic of China
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31
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Mohammed SA. Intrinsic radio-sensitivity of tumours to low let radiations: a mathematical model in LQ formalism. Med Hypotheses 2013; 81:1041-5. [PMID: 24182870 DOI: 10.1016/j.mehy.2013.09.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 09/13/2013] [Accepted: 09/26/2013] [Indexed: 11/18/2022]
Abstract
Intrinsic radio-sensitivity is the determinant of differential response of tumours to low LET ionising radiations. The probabilistic DNA fibril both model shows intrinsic radio-sensitivity factor [I] as function of nuclear diameter (Nd) and intra cellular hydrogen ion concentration [H+]. Linking probabilities of lethal and sub-lethal events to [I] further results in equations which show the LQ parameters namely alpha and beta are functions of (Nd), [H+] and repair constant (μ) mu. This model is able to explain radiobiological phenomena of OER and Do value of lymphocytes.
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32
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MiR-26a enhances the radiosensitivity of glioblastoma multiforme cells through targeting of ataxia-telangiectasia mutated. Exp Cell Res 2013; 320:200-8. [PMID: 24211747 DOI: 10.1016/j.yexcr.2013.10.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 10/24/2013] [Accepted: 10/27/2013] [Indexed: 11/20/2022]
Abstract
Glioblastoma multiforme (GBM) is notoriously resistant to radiation, and consequently, new radiosensitizers are urgently needed. MicroRNAs are a class of endogenous gene modulators with emerging roles in DNA repair. We found that overexpression of miR-26a can enhance radiosensitivity and reduce the DNA repair ability of U87 cells. However, knockdown miR-26a in U87 cells could act the converse manner. Mechanistically, this effect is mediated by direct targeting of miR-26a to the 3'UTR of ATM, which leads to reduced ATM levels and consequent inhibition of the homologous recombination repair pathway. These results suggest that miR-26a may act as a new radiosensitizer of GBM.
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33
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Bandarra S, Fernandes AS, Magro I, Guerreiro PS, Pingarilho M, Churchwell MI, Gil OM, Batinic-Haberle I, Goncalves S, Rueff J, Miranda JP, Marques MM, Beland FA, Castro M, Gaspar JF, Oliveira NG. Mechanistic insights into the cytotoxicity and genotoxicity induced by glycidamide in human mammary cells. Mutagenesis 2013; 28:721-9. [DOI: 10.1093/mutage/get052] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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34
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Kass EM, Helgadottir HR, Chen CC, Barbera M, Wang R, Westermark UK, Ludwig T, Moynahan ME, Jasin M. Double-strand break repair by homologous recombination in primary mouse somatic cells requires BRCA1 but not the ATM kinase. Proc Natl Acad Sci U S A 2013; 110:5564-9. [PMID: 23509290 PMCID: PMC3619303 DOI: 10.1073/pnas.1216824110] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Homology-directed repair (HDR) is a critical pathway for the repair of DNA double-strand breaks (DSBs) in mammalian cells. Efficient HDR is thought to be crucial for maintenance of genomic integrity during organismal development and tumor suppression. However, most mammalian HDR studies have focused on transformed and immortalized cell lines. We report here the generation of a Direct Repeat (DR)-GFP reporter-based mouse model to study HDR in primary cell types derived from diverse lineages. Embryonic and adult fibroblasts from these mice as well as cells derived from mammary epithelium, ovary, and neonatal brain were observed to undergo HDR at I-SceI endonuclease-induced DSBs at similar frequencies. When the DR-GFP reporter was crossed into mice carrying a hypomorphic mutation in the breast cancer susceptibility gene Brca1, a significant reduction in HDR was detected, showing that BRCA1 is critical for HDR in somatic cell types. Consistent with an HDR defect, Brca1 mutant mice are highly sensitive to the cross-linking agent mitomycin C. By contrast, loss of the DSB signaling ataxia telangiectasia-mutated (ATM) kinase did not significantly alter HDR levels, indicating that ATM is dispensable for HDR. Notably, chemical inhibition of ATM interfered with HDR. The DR-GFP mouse provides a powerful tool for dissecting the genetic requirements of HDR in a diverse array of somatic cell types in a normal, nontransformed cellular milieu.
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Affiliation(s)
| | - Hildur R. Helgadottir
- Developmental Biology Program
- Weill Graduate School of Medical Sciences of Cornell University, and
| | - Chun-Chin Chen
- Developmental Biology Program
- Weill Graduate School of Medical Sciences of Cornell University, and
| | | | | | | | - Thomas Ludwig
- Department of Molecular and Cellular Biochemistry, Ohio State University Wexner Medical Center, Columbus, OH 43210
| | - Mary Ellen Moynahan
- Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065; and
| | - Maria Jasin
- Developmental Biology Program
- Weill Graduate School of Medical Sciences of Cornell University, and
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35
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Köcher S, Rieckmann T, Rohaly G, Mansour WY, Dikomey E, Dornreiter I, Dahm-Daphi J. Radiation-induced double-strand breaks require ATM but not Artemis for homologous recombination during S-phase. Nucleic Acids Res 2012; 40:8336-47. [PMID: 22730303 PMCID: PMC3458552 DOI: 10.1093/nar/gks604] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Double-strand breaks (DSBs) are repaired by two distinct pathways, non-homologous end joining (NHEJ) and homologous recombination (HR). The endonuclease Artemis and the PIK kinase Ataxia-Telangiectasia Mutated (ATM), mutated in prominent human radiosensitivity syndromes, are essential for repairing a subset of DSBs via NHEJ in G1 and HR in G2. Both proteins have been implicated in DNA end resection, a mandatory step preceding homology search and strand pairing in HR. Here, we show that during S-phase Artemis but not ATM is dispensable for HR of radiation-induced DSBs. In replicating AT cells, numerous Rad51 foci form gradually, indicating a Rad51 recruitment process that is independent of ATM-mediated end resection. Those DSBs decorated with Rad51 persisted through S- and G2-phase indicating incomplete HR resulting in unrepaired DSBs and a pronounced G2 arrest. We demonstrate that in AT cells loading of Rad51 depends on functional ATR/Chk1. The ATR-dependent checkpoint response is most likely activated when the replication fork encounters radiation-induced single-strand breaks leading to generation of long stretches of single-stranded DNA. Together, these results provide new insight into the role of ATM for initiation and completion of HR during S- and G2-phase. The DSB repair defect during S-phase significantly contributes to the radiosensitivity of AT cells.
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Affiliation(s)
- Sabrina Köcher
- Institute of Radiobiology and Molecular Radiation Oncology, Philipps-University of Marburg, Baldingerstr. 35032 Marburg, Germany
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36
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Ghosh S, Krishna M. Role of Rad52 in fractionated irradiation induced signaling in A549 lung adenocarcinoma cells. Mutat Res 2012; 729:61-72. [PMID: 22001234 DOI: 10.1016/j.mrfmmm.2011.09.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 09/22/2011] [Accepted: 09/27/2011] [Indexed: 05/31/2023]
Abstract
The effect of fractionated doses of γ-irradiation (2Gy per fraction over 5 days), as delivered in cancer radiotherapy, was compared with acute doses of 10 and 2Gy, in A549 cells. A549 cells were found to be relatively more radioresistant if the 10Gy dose was delivered as a fractionated regimen. Microarray analysis showed upregulation of DNA repair and cell cycle arrest genes in the cells exposed to fractionated irradiation. There was intense activation of DNA repair pathway-associated genes (DNA-PK, ATM, Rad52, MLH1 and BRCA1), efficient DNA repair and phospho-p53 was found to be translocated to the nucleus of A549 cells exposed to fractionated irradiation. MCF-7 cells responded differently in fractionated regimen. Silencing of the Rad52 gene in fractionated group of A549 cells made the cells radiosensitive. The above result indicated increased radioresistance in A549 cells due to the activation of Rad52 gene.
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Affiliation(s)
- Somnath Ghosh
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India.
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37
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Gunn A, Bennardo N, Cheng A, Stark JM. Correct end use during end joining of multiple chromosomal double strand breaks is influenced by repair protein RAD50, DNA-dependent protein kinase DNA-PKcs, and transcription context. J Biol Chem 2011; 286:42470-42482. [PMID: 22027841 PMCID: PMC3234933 DOI: 10.1074/jbc.m111.309252] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 10/19/2011] [Indexed: 12/27/2022] Open
Abstract
During repair of multiple chromosomal double strand breaks (DSBs), matching the correct DSB ends is essential to limit rearrangements. To investigate the maintenance of correct end use, we examined repair of two tandem noncohesive DSBs generated by endonuclease I-SceI and the 3' nonprocessive exonuclease Trex2, which can be expressed as an I-SceI-Trex2 fusion. We examined end joining (EJ) repair that maintains correct ends (proximal-EJ) versus using incorrect ends (distal-EJ), which provides a relative measure of incorrect end use (distal end use). Previous studies showed that ATM is important to limit distal end use. Here we show that DNA-PKcs kinase activity and RAD50 are also important to limit distal end use, but that H2AX is dispensable. In contrast, we find that ATM, DNA-PKcs, and RAD50 have distinct effects on repair events requiring end processing. Furthermore, we developed reporters to examine the effects of the transcription context on DSB repair, using an inducible promoter. We find that a DSB downstream from an active promoter shows a higher frequency of distal end use, and a greater reliance on ATM for limiting incorrect end use. Conversely, DSB transcription context does not affect end processing during EJ, the frequency of homology-directed repair, or the role of RAD50 and DNA-PKcs in limiting distal end use. We suggest that RAD50, DNA-PKcs kinase activity, and transcription context are each important to limit incorrect end use during EJ repair of multiple DSBs, but that these factors and conditions have distinct roles during repair events requiring end processing.
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Affiliation(s)
- Amanda Gunn
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of the City of Hope, Duarte, California 91010
| | - Nicole Bennardo
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of the City of Hope, Duarte, California 91010
| | - Anita Cheng
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010
| | - Jeremy M Stark
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of the City of Hope, Duarte, California 91010.
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38
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Premkumar DR, Jane EP, Agostino NR, DiDomenico JD, Pollack IF. Bortezomib-induced sensitization of malignant human glioma cells to vorinostat-induced apoptosis depends on reactive oxygen species production, mitochondrial dysfunction, Noxa upregulation, Mcl-1 cleavage, and DNA damage. Mol Carcinog 2011; 52:118-33. [PMID: 22086447 DOI: 10.1002/mc.21835] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 10/04/2011] [Accepted: 10/12/2011] [Indexed: 01/12/2023]
Abstract
Glioblastomas are invasive tumors with poor prognosis despite current therapies. Histone deacetylase inhibitors (HDACIs) represent a class of agents that can modulate gene expression to reduce tumor growth, and we and others have noted some antiglioma activity from HDACIs, such as vorinostat, although insufficient to warrant use as monotherapy. We have recently demonstrated that proteasome inhibitors, such as bortezomib, dramatically sensitized highly resistant glioma cells to apoptosis induction, suggesting that proteasomal inhibition may be a promising combination strategy for glioma therapeutics. In this study, we examined whether bortezomib could enhance response to HDAC inhibition in glioma cells. Although primary cells from glioblastoma multiforme (GBM) patients and established glioma cell lines did not show significant induction of apoptosis with vorinostat treatment alone, the combination of vorinostat plus bortezomib significantly enhanced apoptosis. The enhanced efficacy was due to proapoptotic mitochondrial injury and increased generation of reactive oxygen species. Our results also revealed that combination of bortezomib with vorinostat enhanced apoptosis by increasing Mcl-1 cleavage, Noxa upregulation, Bak and Bax activation, and cytochrome c release. Further downregulation of Mcl-1 using shRNA enhanced cell killing by the bortezomib/vorinostat combination. Vorinostat induced a rapid and sustained phosphorylation of histone H2AX in primary GBM and T98G cells, and this effect was significantly enhanced by co-administration of bortezomib. Vorinostat/bortezomib combination also induced Rad51 downregulation, which plays an important role in the synergistic enhancement of DNA damage and apoptosis. The significantly enhanced antitumor activity that results from the combination of bortezomib and HDACIs offers promise as a novel treatment for glioma patients.
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Affiliation(s)
- Daniel R Premkumar
- Department of Neurosurgery, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania 15223, USA
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39
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Ghosh S, Narang H, Sarma A, Krishna M. DNA damage response signaling in lung adenocarcinoma A549 cells following gamma and carbon beam irradiation. Mutat Res 2011; 716:10-19. [PMID: 21839752 DOI: 10.1016/j.mrfmmm.2011.07.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 07/22/2011] [Accepted: 07/26/2011] [Indexed: 05/31/2023]
Abstract
Carbon beams (5.16MeV/u, LET=290keV/μm) are high linear energy transfer (LET) radiation characterized by higher relative biological effectiveness than low LET radiation. The aim of the current study was to determine the signaling differences between γ-rays and carbon ion-irradiation. A549 cells were irradiated with 1Gy carbon or γ-rays. Carbon beam was found to be three times more cytotoxic than γ-rays despite the fact that the numbers of γ-H2AX foci were same. Percentage of cells showing ATM/ATR foci were more with γ-rays however number of foci per cell were more in case of carbon irradiation. Large BRCA1 foci were found in all carbon irradiated cells unlike γ-rays irradiated cells and prosurvival ERK pathway was activated after γ-rays irradiation but not carbon. The noteworthy finding of this study is the early phase apoptosis induction by carbon ions. In the present study in A549 lung adenocarcinoma, authors conclude that despite activation of same repair molecules such as ATM and BRCA1, differences in low and high LET damage responses might be due to their distinct macromolecular complexes rather than their individual activation and the activation of cytoplasmic pathways such as ERK, whether it applies to all the cell lines need to be further explored.
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Affiliation(s)
- Somnath Ghosh
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
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40
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Dever SM, Golding SE, Rosenberg E, Adams BR, Idowu MO, Quillin JM, Valerie N, Xu B, Povirk LF, Valerie K. Mutations in the BRCT binding site of BRCA1 result in hyper-recombination. Aging (Albany NY) 2011; 3:515-32. [PMID: 21666281 PMCID: PMC3156602 DOI: 10.18632/aging.100325] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We introduced a K1702M mutation in the BRCA1 BRCT domain known to prevent the binding of proteins harboring pS-X-X-F motifs such as Abraxas-RAP80, BRIP1, and CtIP. Surprisingly, rather than impairing homologous recombination repair (HRR), expression of K1702M resulted in hyper-recombination coinciding with an accumulation of cells in S-G2 and no effect on nonhomologous end-joining. These cells also showed increased RAD51 and RPA nuclear staining. More pronounced effects were seen with a naturally occurring BRCT mutant (M1775R) that also produced elevated levels of ssDNA, in part co-localizing with RPA, in line with excessive DNA resection. M1775R induced unusual, thread-like promyelocytic leukemia (PML) nuclear bodies and clustered RPA foci rather than the typical juxtaposed RPA-PML foci seen with wild-type BRCA1. Interestingly, K1702M hyper-recombination diminished with a second mutation in the BRCA1 RING domain (I26A) known to reduce BRCA1 ubiquitin-ligase activity. Thesein vitro findings correlated with elevated nuclear RAD51 and RPA staining of breast cancer tissue from a patient with the M1775R mutation. Altogether, the disruption of BRCA1 (BRCT)-pS-X-X-F protein binding results in ubiquitination-dependent hyper-recombination via excessive DNA resection and the appearance of atypical PML-NBs. Thus, certain BRCA1 mutations that cause hyper-recombination instead of reduced DSB repair might lead to breast cancer.
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Affiliation(s)
- Seth M Dever
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, 23298, USA
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41
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Squatrito M, Holland EC. DNA damage response and growth factor signaling pathways in gliomagenesis and therapeutic resistance. Cancer Res 2011; 71:5945-9. [PMID: 21917735 DOI: 10.1158/0008-5472.can-11-1245] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The dismal prognosis of glioblastoma multiforme (GBM) is mainly due to the poor response of GBM patients to any therapeutic modalities, which include ionizing radiation and DNA-alkylating agents. In the last few years, the important role of the DNA damage response (DDR) pathway in tumor formation and modulation of therapeutic response has been appreciated. Interestingly, several of the genetic alterations commonly found in GBMs (such as epidermal growth factor receptor amplification and PTEN inactivation) have also recently been shown to regulate the activity of the DNA repair machinery and, consequently, the response to DNA-damaging agents used routinely in the clinic. In this review, we focus on some of these findings that suggest that at least some of the pathways driving GBM formation could be directly responsible for the therapy resistance of this tumor type. Possible therapeutic approaches exist that may either overcome or take advantage of these GBM genetic alterations to improve the response of these tumors to DNA-damaging therapy.
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Affiliation(s)
- Massimo Squatrito
- Department of Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, New York, USA.
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42
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Ghosh S, Narang H, Sarma A, Kaur H, Krishna M. Activation of DNA damage response signaling in lung adenocarcinoma A549 cells following oxygen beam irradiation. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2011; 723:190-8. [DOI: 10.1016/j.mrgentox.2011.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 04/05/2011] [Accepted: 05/09/2011] [Indexed: 11/16/2022]
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43
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Keimling M, Volcic M, Csernok A, Wieland B, Dörk T, Wiesmüller L. Functional characterization connects individual patient mutations in
ataxia telangiectasia mutated (ATM)
with dysfunction of specific DNA double‐strand break‐repair signaling pathways. FASEB J 2011; 25:3849-60. [DOI: 10.1096/fj.11-185546] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Marlen Keimling
- Department of Obstetrics and GynecologyUlm University Ulm Germany
| | - Meta Volcic
- Department of Obstetrics and GynecologyUlm University Ulm Germany
| | - Andreea Csernok
- Department of Obstetrics and GynecologyUlm University Ulm Germany
| | - Britta Wieland
- Gynecology Research UnitHannover Medical School Hannover Germany
- Department of Radiation OncologyHannover Medical School Hannover Germany
| | - Thilo Dörk
- Gynecology Research UnitHannover Medical School Hannover Germany
| | - Lisa Wiesmüller
- Department of Obstetrics and GynecologyUlm University Ulm Germany
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44
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Hawkins AJ, Golding SE, Khalil A, Valerie K. DNA double-strand break - induced pro-survival signaling. Radiother Oncol 2011; 101:13-7. [PMID: 21726915 DOI: 10.1016/j.radonc.2011.05.074] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 05/29/2011] [Accepted: 05/29/2011] [Indexed: 11/18/2022]
Abstract
Radiation and other types of DNA damaging agents induce a plethora of signaling events simultaneously originating from the nucleus, cytoplasm, and plasma membrane. As a result, this presents a dilemma when seeking to determine causal relationships and better insight into the intricacies of stress signaling. ATM plays critical roles in both nuclear and cytoplasmic signaling, of which, the DNA damage response (DDR) is the best characterized. We have recently created experimental conditions where the DNA damage signal alone can be studied while minimizing the influence from the extranuclear compartment. We have been able to document pro-survival and growth promoting signaling (via ATM-AKT-ERK) resulting from low levels of DSBs (equivalent to ≤2 Gy). More extensive DSBs (>2 Gy eq.) result in phosphatase-mediated ERK dephosphorylation, and thus shutdown of ERK signaling. In contrast, radiation does not result in such dephosphorylation even at very high doses. We propose that phosphatases are inactivated perhaps as a result of reactive oxygen species, which does not occur in response to 'pure' DNA damage. Our findings suggest that clinically relevant radiation doses, which are intended to halt tumor growth and induce cell death, are unable to inhibit tumor pro-survival signaling via ERK dephosphorylation.
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Affiliation(s)
- Amy J Hawkins
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA 23298-0058, USA
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45
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Stimulation of homology-directed repair at I-SceI-induced DNA breaks during the permissive life cycle of human cytomegalovirus. J Virol 2011; 85:6049-54. [PMID: 21490102 DOI: 10.1128/jvi.02514-10] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Human cytomegalovirus (HCMV) selectively relocalizes many DNA repair proteins, thereby avoiding a potentially detrimental damage response. In the present study, we evaluated interactions between HCMV and the homology-directed repair (HDR) pathway. In permissive human foreskin fibroblasts, a fluorescence-based double-stranded break repair assay was used to determine that HCMV stimulated HDR. Repair of both stably integrated and extrachromosomal reporter substrates was observed to increase. HDR was also stimulated through individual expression of the viral immediate-early protein IE1-72, mimicking full virus infection. These experiments further demonstrate HCMV's role in modulating critical cellular processes during a permissive infection.
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46
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Sargent RG, Kim S, Gruenert DC. Oligo/polynucleotide-based gene modification: strategies and therapeutic potential. Oligonucleotides 2011; 21:55-75. [PMID: 21417933 DOI: 10.1089/oli.2010.0273] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Oligonucleotide- and polynucleotide-based gene modification strategies were developed as an alternative to transgene-based and classical gene targeting-based gene therapy approaches for treatment of genetic disorders. Unlike the transgene-based strategies, oligo/polynucleotide gene targeting approaches maintain gene integrity and the relationship between the protein coding and gene-specific regulatory sequences. Oligo/polynucleotide-based gene modification also has several advantages over classical vector-based homologous recombination approaches. These include essentially complete homology to the target sequence and the potential to rapidly engineer patient-specific oligo/polynucleotide gene modification reagents. Several oligo/polynucleotide-based approaches have been shown to successfully mediate sequence-specific modification of genomic DNA in mammalian cells. The strategies involve the use of polynucleotide small DNA fragments, triplex-forming oligonucleotides, and single-stranded oligodeoxynucleotides to mediate homologous exchange. The primary focus of this review will be on the mechanistic aspects of the small fragment homologous replacement, triplex-forming oligonucleotide-mediated, and single-stranded oligodeoxynucleotide-mediated gene modification strategies as it relates to their therapeutic potential.
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Affiliation(s)
- R Geoffrey Sargent
- Department of Otolaryngology-Head and Neck Surgery, University of California , San Francisco, California 94115, USA
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EMSY overexpression disrupts the BRCA2/RAD51 pathway in the DNA-damage response: implications for chromosomal instability/recombination syndromes as checkpoint diseases. Mol Genet Genomics 2011; 285:325-40. [PMID: 21409565 PMCID: PMC3064890 DOI: 10.1007/s00438-011-0612-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 02/27/2011] [Indexed: 11/05/2022]
Abstract
EMSY links the BRCA2 pathway to sporadic breast/ovarian cancer. It encodes a nuclear protein that binds to the BRCA2 N-terminal domain implicated in chromatin/transcription regulation, but when sporadically amplified/overexpressed, increased EMSY level represses BRCA2 transactivation potential and induces chromosomal instability, mimicking the activity of BRCA2 mutations in the development of hereditary breast/ovarian cancer. In addition to chromatin/transcription regulation, EMSY may also play a role in the DNA-damage response, suggested by its ability to localize at chromatin sites of DNA damage/repair. This implies that EMSY overexpression may also repress BRCA2 in DNA-damage replication/checkpoint and recombination/repair, coordinated processes that also require its interacting proteins: PALB2, the partner and localizer of BRCA2; RPA, replication/checkpoint protein A; and RAD51, the inseparable recombination/repair enzyme. Here, using a well-characterized recombination/repair assay system, we demonstrate that a slight increase in EMSY level can indeed repress these two processes independently of transcriptional interference/repression. Since EMSY, RPA and PALB2 all bind to the same BRCA2 region, these findings further support a scenario wherein: (a) EMSY amplification may mimic BRCA2 deficiency, at least by overriding RPA and PALB2, crippling the BRCA2/RAD51 complex at DNA-damage and replication/transcription sites; and (b) BRCA2/RAD51 may coordinate these processes by employing at least EMSY, PALB2 and RPA. We extensively discuss the molecular details of how this can happen to ascertain its implications for a novel recombination mechanism apparently conceived as checkpoint rather than a DNA repair system for cell division, survival, death, and human diseases, including the tissue specificity of cancer predisposition, which may renew our thinking about targeted therapy and prevention.
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Short SC, Giampieri S, Worku M, Alcaide-German M, Sioftanos G, Bourne S, Lio KI, Shaked-Rabi M, Martindale C. Rad51 inhibition is an effective means of targeting DNA repair in glioma models and CD133+ tumor-derived cells. Neuro Oncol 2011; 13:487-99. [PMID: 21363882 DOI: 10.1093/neuonc/nor010] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
High grade gliomas (HGGs) are characterized by resistance to radiotherapy and chemotherapy. Targeting Rad51-dependent homologous recombination repair may be an effective target for chemo- and radiosensitization. In this study we assessed the role of Rad51-dependent repair on sensitivity to radiation and temozolomide (TMZ) as single agents or in combination. Repair protein levels in established glioma cell lines, early passage glioblastoma multiforme (GBM) cell lines, and normal human astrocytes (NHAs) were measured using western blot. Viability and clonogenic survival assays were used to measure the effects of Rad51 knockdown with radiation (XR) and TMZ. Immunocytochemistry was used to evaluate kinetics of Rad51 and γ-H2AX repair foci. Immunohistochemistry was used to assess Rad51 protein levels in glioma specimens. Repair proteins including Rad51 are upregulated in HGG cells compared with NHA. Established glioma cell lines show a dose-dependent increase in Rad51 foci formation after XR and TMZ. Rad51 levels are inversely correlated with radiosensitivity, and downregulation markedly increases the cytotoxicity of TMZ. Rad51 knockdown also promotes more residual γ-H2AX foci 24 h after combined treatment. Newly established GBM cell lines also have high Rad51 levels and are extremely sensitive to Rad51 knockdown. Clinical samples from recently resected gliomas of varying grades demonstrate that Rad51 levels do not correlate with tumor grade. Rad51-dependent repair makes a significant contribution to DNA repair in glioma cells and contributes to resistance to both XR and TMZ. Agents targeting Rad51-dependent repair would be effective adjuvants in standard combination regimens.
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Affiliation(s)
- Susan C Short
- UCL Cancer Institute, University College London, London, UK.
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Khalil A, Morgan RN, Adams BR, Golding SE, Dever SM, Rosenberg E, Povirk LF, Valerie K. ATM-dependent ERK signaling via AKT in response to DNA double-strand breaks. Cell Cycle 2011; 10:481-91. [PMID: 21263216 DOI: 10.4161/cc.10.3.14713] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Ionizing radiation (IR) triggers many signaling pathways primarily originating from either damaged DNA or non-nuclear sources such as growth factor receptors. Thus, to study the DNA damage-induced signaling component alone by irradiation would be a challenge. To generate DNA double-strand breaks (DSBs) and minimize non-nuclear signaling, human cancer cells having bromodeoxyuridine (BrdU) - substituted DNA were treated with the photosensitizer Hoechst 33258 followed by long wavelength UV (UV-A) treatment (BrdU photolysis). BrdU photolysis resulted in well-controlled, dose- dependent generation of DSBs equivalent to radiation doses between 0.2 - 20 Gy, as determined by pulsed-field gel electrophoresis, and accompanied by dose-dependent ATM (ser-1981), H2AX (ser-139), Chk2 (thr-68), and p53 (ser-15) phosphorylation. Interestingly, low levels (≤ 2 Gy equivalents) of BrdU photolysis stimulated ERK phosphorylation whereas higher (> 2 Gy eq.) resulted in ERK dephosphorylation. ERK phosphorylation was ATM-dependent whereas dephosphorylation was ATM-independent. The ATM-dependent increase in ERK phosphorylation was also seen when DSBs were generated by transfection of cells with an EcoRI expression plasmid or by electroporation of EcoRI enzyme. Furthermore, AKT was critical for transmitting the DSB signal to ERK. Altogether, our results show that low levels of DSBs trigger ATM- and AKT-dependent ERK pro-survival signaling and increased cell proliferation whereas higher levels result in ERK dephosphorylation consistent with a dose-dependent switch from pro-survival to anti-survival signaling.
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Affiliation(s)
- Ashraf Khalil
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, USA
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Yu X, Wang H, Wang P, Chen BPC, Wang Y. The Ku-dependent non-homologous end-joining pathway contributes to low-dose radiation-stimulated cell survival. J Cell Physiol 2011; 226:369-74. [PMID: 20665702 DOI: 10.1002/jcp.22342] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Low-dose (≤0.1 Gy) radiation-induced adaptive responses could protect cells from high-challenge dose radiation-induced killing. The protective role is believed to promote the repair of DNA double-strand breaks (DSBs) that are a severe threat to cell survival. However, it remains unclear which repair pathway, homologous recombination repair (HRR) or non-homologous end-joining (NHEJ), is promoted by low-dose radiation. To address this question, we examined the effects of low-dose (0.1 Gy) on high-challenge dose (2-4 Gy) induced killing in NHEJ- or HRR-deficient cell lines. We showed that 0.1 Gy reduced the high-dose radiation-induced killing for wild-type or HRR-deficient cells, but enhanced the killing for NHEJ-deficient cells. Interestingly, low-dose radiation also enhanced the killing for wild-type cells exposed to high-challenge dose radiation with high-linear energy transfer (LET). Because it is known that high-LET radiation induces an inefficient NHEJ, these results support that the low-dose radiation-stimulated protective role in reducing high-challenge dose (low-LET)-induced cell killing might depend on NHEJ. In addition, we showed that low-dose radiation activated the DNA-PK catalytic subunit (DNA-PKcs) and the inhibitor of DNA-PKcs destroyed the low-dose radiation-induced protective role. These results suggest that low-dose radiation might promote NHEJ through the stimulation of DNA-PKcs activity and; therefore, increase the resistance of cells to high-challenge dose radiation-induced killing.
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Affiliation(s)
- Xiaoyan Yu
- Department of Radiation Oncology, Emory University School of Medicine, Winship Cancer Institute of Emory University, Atlanta, Georgia 30322, USA
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