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Adisasmita M, Lee HK, An Y, Kim M, Mamo MG, Hur JK, Choi D, Shin JH, Jung YK. Epigenetic modulation inhibits epithelial-mesenchymal transition-driven fibrogenesis and enhances characteristics of chemically-derived hepatic progenitors. Ann Surg Treat Res 2024; 106:274-283. [PMID: 38725803 PMCID: PMC11076951 DOI: 10.4174/astr.2024.106.5.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/02/2024] [Accepted: 03/05/2024] [Indexed: 05/12/2024] Open
Abstract
Purpose One of the novel cell sources of cell-based liver regenerative medicine is human chemically-derived hepatic progenitors (hCdHs). We previously established this cell by direct hepatocyte reprogramming with a combination of small molecules (hepatocyte growth factor, A83-01, CHIR99021). However, there have been several issues concerning the cell's stability and maintenance, namely the occurrences of epithelial-mesenchymal transition (EMT) that develop fibrotic phenotypes, resulting in the loss of hepatic progenitor characteristics. These hepatic progenitor attributes are thought to be regulated by SOX9, a transcription factor essential for hepatic progenitor cells and cholangiocytes. Methods To suppress the fibrotic phenotype and improve our long-term hCdHs culture technology, we utilized the epigenetic modulating drugs DNA methyltransferase inhibitor (5-azacytidine) and histone deacetylase inhibitor (sodium butyrate) that have been reported to suppress and revert hepatic fibrosis. To confirm the essential role of SOX9 to our cell, we used clustered regularly interspaced short palindromic repeats-interference (CRISPRi) to repress the SOX9 expression. Results The treatment of only 5-azacytidine significantly reduces the fibrosis/mesenchymal marker and EMT-related transcription factor expression level in the early passages. Interestingly, this treatment also increased the hepatic progenitor markers expression, even during the reprogramming phase. Then, we confirmed the essential role of SOX9 by repressing the SOX9 expression with CRISPRi which resulted in the downregulation of several essential hepatic progenitor cell markers. Conclusion These results highlight the capacity of 5-azacytidine to inhibit EMT-driven hepatic fibrosis and the significance of SOX9 on hepatic progenitor cell stemness properties.
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Affiliation(s)
- Michael Adisasmita
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
| | - Hyomin K Lee
- Major in Medical Genetics, Department of Medicine, Graduate School, Hanyang University, Seoul, Korea
- Department of Genetics, Hanyang University College of Medicine, Seoul, Korea
| | - Yohan An
- Department of Genetics, Hanyang University College of Medicine, Seoul, Korea
- Department of Biomedical Science, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea
| | - Myounghoi Kim
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
| | - Michael Girma Mamo
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
| | - Junho K. Hur
- Department of Genetics, Hanyang University College of Medicine, Seoul, Korea
- Department of Biomedical Science, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea
| | - Dongho Choi
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
| | - Ji Hyun Shin
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
| | - Yun Kyung Jung
- Department of Surgery, Hanyang University College of Medicine, Seoul, Korea
- Research Institute of Regenerative Medicine and Stem Cells, Hanyang University, Seoul, Korea
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2
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Yano N, Fedulov AV. Targeted DNA Demethylation: Vectors, Effectors and Perspectives. Biomedicines 2023; 11:biomedicines11051334. [PMID: 37239005 DOI: 10.3390/biomedicines11051334] [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: 03/28/2023] [Revised: 04/21/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Aberrant DNA hypermethylation at regulatory cis-elements of particular genes is seen in a plethora of pathological conditions including cardiovascular, neurological, immunological, gastrointestinal and renal diseases, as well as in cancer, diabetes and others. Thus, approaches for experimental and therapeutic DNA demethylation have a great potential to demonstrate mechanistic importance, and even causality of epigenetic alterations, and may open novel avenues to epigenetic cures. However, existing methods based on DNA methyltransferase inhibitors that elicit genome-wide demethylation are not suitable for treatment of diseases with specific epimutations and provide a limited experimental value. Therefore, gene-specific epigenetic editing is a critical approach for epigenetic re-activation of silenced genes. Site-specific demethylation can be achieved by utilizing sequence-dependent DNA-binding molecules such as zinc finger protein array (ZFA), transcription activator-like effector (TALE) and clustered regularly interspaced short palindromic repeat-associated dead Cas9 (CRISPR/dCas9). Synthetic proteins, where these DNA-binding domains are fused with the DNA demethylases such as ten-eleven translocation (Tet) and thymine DNA glycosylase (TDG) enzymes, successfully induced or enhanced transcriptional responsiveness at targeted loci. However, a number of challenges, including the dependence on transgenesis for delivery of the fusion constructs, remain issues to be solved. In this review, we detail current and potential approaches to gene-specific DNA demethylation as a novel epigenetic editing-based therapeutic strategy.
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Affiliation(s)
- Naohiro Yano
- Department of Surgery, Rhode Island Hospital, Alpert Medical School of Brown University, 593 Eddy Street, Providence, RI 02903, USA
| | - Alexey V Fedulov
- Department of Surgery, Rhode Island Hospital, Alpert Medical School of Brown University, 593 Eddy Street, Providence, RI 02903, USA
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3
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Grypari IM, Pappa I, Papastergiou T, Zolota V, Bravou V, Melachrinou M, Megalooikonomou V, Tzelepi V. Elucidating the role of PRMTs in prostate cancer using open access databases and a patient cohort dataset. Histol Histopathol 2023; 38:287-302. [PMID: 36082942 DOI: 10.14670/hh-18-513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Protein arginine methylation is an understudied epigenetic mechanism catalyzed by enzymes known as Protein Methyltransferases of Arginine (PRMTs), while the opposite reaction is performed by Jumonji domain- containing protein 6 (JMJD6). There is increasing evidence that PRMTs are deregulated in prostate cancer (PCa). In this study, the expression of two PRMT members, PRMT2 and PRMT7 as well as JMJD6, a demethylase, was analyzed in PCa. Initially, we retrieved data from The Cancer Genome Atlas (TCGA) project and the Gene Expression Omnibus (GEO) database to explore the differential expression of various PRMT family members in patients with PCa and then applied immunohistochemistry in a patient cohort across the spectrum of PCa, including non-neoplastic prostate tissue and lymph node metastatic foci. The results from the TCGA analysis revealed that PRMT7, PRMT6 and PRMT3 expression increased while PRMT2, PRMT9 and JMJD6 levels decreased in the tumor compared to non-neoplastic prostate. Results from the GEO datasets were similar, albeit not identical with the TCGA results, with PRMT7 and PRMT3 being upregulated and PRMT2 and JMJD6 being downregulated in the tumor compared to non-neoplastic tissue in some of them. In addition, PRMT7 levels decreased with stage and grade progression in the TCGA analysis. In the patient cohort, both PRMTs and JMJD6 were overexpressed in PCa compared to non-neoplastic tissue, and nuclear PRMT2 and JMJD6 were upregulated in lymph node metastasis, too. PRMT7 and JMJD6 expression were upregulated with the progression of stage and JMJD6 was also increased with the elevation of grade. After androgen ablation therapy, nuclear expression of PRMT7 and JMJD6 were elevated compared to untreated tumors. PRMT2, PRMT7 and JMD6 were also correlated with markers of EMT and cell cycle regulators. Finally, our findings indicate that PRMTs and JMJD6 are involved in prostate cancer progression and revealed a potential interplay of PRMTs with EMT mediators, underscoring the need for therapeutic targeting of arginine methylation in prostate cancer.
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Affiliation(s)
- Ioanna Maria Grypari
- Department of Pathology, School of Medicine, University of Patras, Patras, Greece
| | - Ioanna Pappa
- Multidimensional Data Analysis and Knowledge Management Laboratory, Computer Engineering and Informatics Department, School of Engineering, University of Patras, Patras, Greece
| | - Thomas Papastergiou
- Multidimensional Data Analysis and Knowledge Management Laboratory, Computer Engineering and Informatics Department, School of Engineering, University of Patras, Patras, Greece
| | - Vasiliki Zolota
- Department of Pathology, School of Medicine, University of Patras, Patras, Greece
| | - Vasiliki Bravou
- Department of Anatomy, Histology and Embryology, School of Medicine, University of Patras, Patras, Greece
| | - Maria Melachrinou
- Department of Pathology, School of Medicine, University of Patras, Patras, Greece
| | - Vasileios Megalooikonomou
- Multidimensional Data Analysis and Knowledge Management Laboratory, Computer Engineering and Informatics Department, School of Engineering, University of Patras, Patras, Greece
| | - Vasiliki Tzelepi
- Department of Pathology, School of Medicine, University of Patras, Patras, Greece.
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4
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Chiavellini P, Canatelli-Mallat M, Lehmann M, Goya RG, Morel GR. Therapeutic potential of glial cell line-derived neurotrophic factor and cell reprogramming for hippocampal-related neurological disorders. Neural Regen Res 2022; 17:469-476. [PMID: 34380873 PMCID: PMC8504380 DOI: 10.4103/1673-5374.320966] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Hippocampus serves as a pivotal role in cognitive and emotional processes, as well as in the regulation of the hypothalamus-pituitary axis. It is known to undergo mild neurodegenerative changes during normal aging and severe atrophy in Alzheimer’s disease. Furthermore, dysregulation in the hippocampal function leads to epilepsy and mood disorders. In the first section, we summarized the most salient knowledge on the role of glial cell-line-derived neurotrophic factor and its receptors focused on aging, cognition and neurodegenerative and hippocampal-related neurological diseases mentioned above. In the second section, we reviewed the therapeutic approaches, particularly gene therapy, using glial cell-line-derived neurotrophic factor or its gene, as a key molecule in the development of neurological disorders. In the third section, we pointed at the potential of regenerative medicine, as an emerging and less explored strategy for the treatment of hippocampal disorders. We briefly reviewed the use of partial reprogramming to restore brain functions, non-neuronal cell reprogramming to generate neural stem cells, and neural progenitor cells as source-specific neuronal types to be implanted in animal models of specific neurodegenerative disorders.
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Affiliation(s)
- Priscila Chiavellini
- Biochemistry Research Institute of La Plata (INIBIOLP)-Histology and Embryology B, School of Medical Sciences, National University of La Plata (UNLP), La Plata, Buenos Aires, Argentina
| | - Martina Canatelli-Mallat
- Biochemistry Research Institute of La Plata (INIBIOLP)-Histology and Embryology B, School of Medical Sciences, National University of La Plata (UNLP), La Plata, Buenos Aires, Argentina
| | - Marianne Lehmann
- Biochemistry Research Institute of La Plata (INIBIOLP)-Histology and Embryology B, School of Medical Sciences, National University of La Plata (UNLP), La Plata, Buenos Aires, Argentina
| | - Rodolfo G Goya
- Biochemistry Research Institute of La Plata (INIBIOLP)-Histology and Embryology B, School of Medical Sciences, National University of La Plata (UNLP), La Plata, Buenos Aires, Argentina
| | - Gustavo R Morel
- Biochemistry Research Institute of La Plata (INIBIOLP)-Histology and Embryology B, School of Medical Sciences, National University of La Plata (UNLP), La Plata, Buenos Aires, Argentina
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5
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Dzobo K. Coronavirus Disease 19 and Future Ecological Crises: Hopes from Epigenomics and Unraveling Genome Regulation in Humans and Infectious Agents. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2021; 25:269-278. [PMID: 33904782 DOI: 10.1089/omi.2021.0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
With coronavirus disease 19 (COVID-19), we have witnessed a shift from public health to planetary health and a growing recognition of the importance of systems science in developing effective solutions against pandemics in the 21st century. COVID-19 and the history of frequent infectious outbreaks in the last two decades suggest that COVID-19 is likely a dry run for future ecological crises. Now is the right time to plan ahead and deploy the armamentarium of systems science scholarship for planetary health. The science of epigenomics, which investigates both genetic and nongenetic traits regarding heritable phenotypic alterations, and new approaches to understanding genome regulation in humans and pathogens offer veritable prospects to boost the global scientific capacities to innovate therapeutics and diagnostics against novel and existing infectious agents. Several reversible epigenetic alterations, such as chromatin remodeling and histone methylation, control and influence gene expression. COVID-19 lethality is linked, in part, to the cytokine storm, age, and status of the immune system in a given person. Additionally, due to reduced human mobility and daily activities, effects of the pandemic on the environment have been both positive and negative. For example, reduction in environmental pollution and lesser extraction from nature have potential positive corollaries on water and air quality. Negative effects include pollution as plastics and other materials were disposed in unconventional places and spaces in the course of the pandemic. I discuss the opportunities and challenges associated with the science of epigenomics, specifically with an eye to inform and prevent future ecological crises and pandemics that are looming on the horizon in the 21st century. In particular, this article underscores that epigenetics of both viruses and the host may influence virus infectivity and severity of attendant disease.
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Affiliation(s)
- Kevin Dzobo
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, Cape Town, South Africa.,Division of Medical Biochemistry and Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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6
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Garcinol-A Natural Histone Acetyltransferase Inhibitor and New Anti-Cancer Epigenetic Drug. Int J Mol Sci 2021; 22:ijms22062828. [PMID: 33799504 PMCID: PMC8001519 DOI: 10.3390/ijms22062828] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 12/11/2022] Open
Abstract
Garcinol extracted from Garcinia indica fruit peel and leaves is a polyisoprenylated benzophenone. In traditional medicine it was used for its antioxidant and anti-inflammatory properties. Several studies have shown anti-cancer properties of garcinol in cancer cell lines and experimental animal models. Garcinol action in cancer cells is based on its antioxidant and anti-inflammatory properties, but also on its potency to inhibit histone acetyltransferases (HATs). Recent studies indicate that garcinol may also deregulate expression of miRNAs involved in tumour development and progression. This paper focuses on the latest research concerning garcinol as a HAT inhibitor and miRNA deregulator in the development and progression of various cancers. Garcinol may be considered as a candidate for next generation epigenetic drugs, but further studies are needed to establish the precise toxicity, dosages, routes of administration, and safety for patients.
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7
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Sgro A, Blancafort P. Epigenome engineering: new technologies for precision medicine. Nucleic Acids Res 2021; 48:12453-12482. [PMID: 33196851 PMCID: PMC7736826 DOI: 10.1093/nar/gkaa1000] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 10/10/2020] [Accepted: 10/16/2020] [Indexed: 02/07/2023] Open
Abstract
Chromatin adopts different configurations that are regulated by reversible covalent modifications, referred to as epigenetic marks. Epigenetic inhibitors have been approved for clinical use to restore epigenetic aberrations that result in silencing of tumor-suppressor genes, oncogene addictions, and enhancement of immune responses. However, these drugs suffer from major limitations, such as a lack of locus selectivity and potential toxicities. Technological advances have opened a new era of precision molecular medicine to reprogram cellular physiology. The locus-specificity of CRISPR/dCas9/12a to manipulate the epigenome is rapidly becoming a highly promising strategy for personalized medicine. This review focuses on new state-of-the-art epigenome editing approaches to modify the epigenome of neoplasms and other disease models towards a more 'normal-like state', having characteristics of normal tissue counterparts. We highlight biomolecular engineering methodologies to assemble, regulate, and deliver multiple epigenetic effectors that maximize the longevity of the therapeutic effect, and we discuss limitations of the platforms such as targeting efficiency and intracellular delivery for future clinical applications.
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Affiliation(s)
- Agustin Sgro
- Cancer Epigenetics Laboratory, The Harry Perkins Institute of Medical Research, Nedlands, Western Australia 6009, Australia.,School of Human Sciences, The University of Western Australia, Crawley, Perth, Western Australia 6009, Australia
| | - Pilar Blancafort
- Cancer Epigenetics Laboratory, The Harry Perkins Institute of Medical Research, Nedlands, Western Australia 6009, Australia.,School of Human Sciences, The University of Western Australia, Crawley, Perth, Western Australia 6009, Australia.,The Greehey Children's Cancer Research Institute, The University of Texas Health Science Center, San Antonio, TX 78229, USA
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8
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Rehman S, Aatif M, Rafi Z, Khan MY, Shahab U, Ahmad S, Farhan M. Effect of non-enzymatic glycosylation in the epigenetics of cancer. Semin Cancer Biol 2020; 83:543-555. [DOI: 10.1016/j.semcancer.2020.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 02/09/2023]
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9
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Leite ML, Oliveira KBS, Cunha VA, Dias SC, da Cunha NB, Costa FF. Epigenetic Therapies in the Precision Medicine Era. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.201900184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Michel Lopes Leite
- Genomic Sciences and Biotechnology Program UCB ‐ Brasilia, SgAN 916, Modulo B, Bloco C, 70790‐160 Brasília DF Brazil
| | | | - Victor Albuquerque Cunha
- Genomic Sciences and Biotechnology Program UCB ‐ Brasilia, SgAN 916, Modulo B, Bloco C, 70790‐160 Brasília DF Brazil
| | - Simoni Campos Dias
- Genomic Sciences and Biotechnology Program UCB ‐ Brasilia, SgAN 916, Modulo B, Bloco C, 70790‐160 Brasília DF Brazil
- Animal Biology DepartmentUniversidade de Brasília UnB, Campus Darcy Ribeiro. Brasilia DF 70910‐900 Brazil
| | - Nicolau Brito da Cunha
- Genomic Sciences and Biotechnology Program UCB ‐ Brasilia, SgAN 916, Modulo B, Bloco C, 70790‐160 Brasília DF Brazil
| | - Fabricio F. Costa
- Cancer Biology and Epigenomics ProgramAnn & Robert H Lurie Children's Hospital of Chicago Research Center, Northwestern University's Feinberg School of Medicine 2430 N. Halsted St., Box 220 Chicago IL 60611 USA
- Northwestern University's Feinberg School of Medicine 2430 N. Halsted St., Box 220 Chicago IL 60611 USA
- MATTER Chicago 222 W. Merchandise Mart Plaza, Suite 12th Floor Chicago IL 60654 USA
- Genomic Enterprise (www.genomicenterprise.com) San Diego, CA 92008 and New York NY 11581 USA
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10
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Zhang T, Pilko A, Wollman R. Loci specific epigenetic drug sensitivity. Nucleic Acids Res 2020; 48:4797-4810. [PMID: 32246716 PMCID: PMC7229858 DOI: 10.1093/nar/gkaa210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 02/10/2020] [Accepted: 03/27/2020] [Indexed: 12/14/2022] Open
Abstract
Therapeutic targeting of epigenetic modulators offers a novel approach to the treatment of multiple diseases. The cellular consequences of chemical compounds that target epigenetic regulators (epi-drugs) are complex. Epi-drugs affect global cellular phenotypes and cause local changes to gene expression due to alteration of a gene chromatin environment. Despite increasing use in the clinic, the mechanisms responsible for cellular changes are unclear. Specifically, to what degree the effects are a result of cell-wide changes or disease related locus specific effects is unknown. Here we developed a platform to systematically and simultaneously investigate the sensitivity of epi-drugs at hundreds of genomic locations by combining DNA barcoding, unique split-pool encoding, and single cell expression measurements. Internal controls are used to isolate locus specific effects separately from any global consequences these drugs have. Using this platform we discovered wide-spread loci specific sensitivities to epi-drugs for three distinct epi-drugs that target histone deacetylase, DNA methylation and bromodomain proteins. By leveraging ENCODE data on chromatin modification, we identified features of chromatin environments that are most likely to be affected by epi-drugs. The measurements of loci specific epi-drugs sensitivities will pave the way to the development of targeted therapy for personalized medicine.
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Affiliation(s)
- Thanutra Zhang
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, CA, USA
| | - Anna Pilko
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, CA, USA
- Departments of Integrative Biology and Physiology and Chemistry and Biochemistry, University of California UCLA, CA, USA
| | - Roy Wollman
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, CA, USA
- Departments of Integrative Biology and Physiology and Chemistry and Biochemistry, University of California UCLA, CA, USA
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11
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Dzobo K. Epigenomics-Guided Drug Development: Recent Advances in Solving the Cancer Treatment "jigsaw puzzle". OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2020; 23:70-85. [PMID: 30767728 DOI: 10.1089/omi.2018.0206] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The human epigenome plays a key role in determining cellular identity and eventually function. Drug discovery undertakings have focused mainly on the role of genomics in carcinogenesis, with the focus turning to the epigenome recently. Drugs targeting DNA and histone modifications are under development with some such as 5-azacytidine, decitabine, vorinostat, and panobinostat already approved by the Food and Drug Administration (FDA) and the European Medicines Agency (EMA). This expert review offers a critical analysis of the epigenomics-guided drug discovery and development and the opportunities and challenges for the next decade. Importantly, the coupling of epigenetic editing techniques, such as clustered regularly interspersed short palindromic repeat (CRISPR)-CRISPR-associated protein-9 (Cas9) and APOBEC-coupled epigenetic sequencing (ACE-seq) with epigenetic drug screens, will allow the identification of small-molecule inhibitors or drugs able to reverse epigenetic changes responsible for many diseases. In addition, concrete and sustainable innovation in cancer treatment ought to integrate epigenome targeting drugs with classic therapies such as chemotherapy and immunotherapy.
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Affiliation(s)
- Kevin Dzobo
- 1 International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, Cape Town, South Africa.,2 Division of Medical Biochemistry and Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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12
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Baskin NL, Haynes KA. Chromatin engineering offers an opportunity to advance epigenetic cancer therapy. Nat Struct Mol Biol 2020; 26:842-845. [PMID: 31582843 DOI: 10.1038/s41594-019-0299-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Natecia L Baskin
- Emory University, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, GA, USA
| | - Karmella A Haynes
- Emory University, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, GA, USA.
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13
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Perera BP, Faulk C, Svoboda LK, Goodrich JM, Dolinoy DC. The role of environmental exposures and the epigenome in health and disease. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2020; 61:176-192. [PMID: 31177562 PMCID: PMC7252203 DOI: 10.1002/em.22311] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/29/2019] [Accepted: 06/03/2019] [Indexed: 05/02/2023]
Abstract
The genetic material of every organism exists within the context of regulatory networks that govern gene expression, collectively called the epigenome. Epigenetics has taken center stage in the study of diseases such as cancer and diabetes, but its integration into the field of environmental health is still emerging. As the Environmental Mutagenesis and Genomics Society (EMGS) celebrates its 50th Anniversary this year, we have come together to review and summarize the seminal advances in the field of environmental epigenomics. Specifically, we focus on the role epigenetics may play in multigenerational and transgenerational transmission of environmentally induced health effects. We also summarize state of the art techniques for evaluating the epigenome, environmental epigenetic analysis, and the emerging field of epigenome editing. Finally, we evaluate transposon epigenetics as they relate to environmental exposures and explore the role of noncoding RNA as biomarkers of environmental exposures. Although the field has advanced over the past several decades, including being recognized by EMGS with its own Special Interest Group, recently renamed Epigenomics, we are excited about the opportunities for environmental epigenetic science in the next 50 years. Environ. Mol. Mutagen. 61:176-192, 2020. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Bambarendage P.U. Perera
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Christopher Faulk
- Department of Animal Sciences, University of Minnesota, St. Paul, Minnesota
| | - Laurie K. Svoboda
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Jaclyn M. Goodrich
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Dana C. Dolinoy
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
- Correspondence to: Dana C. Dolinoy, Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan.
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Tzelepi V, Logotheti S, Efstathiou E, Troncoso P, Aparicio A, Sakellakis M, Hoang A, Perimenis P, Melachrinou M, Logothetis C, Zolota V. Epigenetics and prostate cancer: defining the timing of DNA methyltransferase deregulation during prostate cancer progression. Pathology 2019; 52:218-227. [PMID: 31864524 DOI: 10.1016/j.pathol.2019.10.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/25/2019] [Accepted: 10/08/2019] [Indexed: 01/31/2023]
Abstract
DNA methyltransferases (DNMTs) regulate gene expression by methylating cytosine residues within CpG dinucleotides. Aberrant methylation patterns have been shown in a variety of human tumours including prostate cancer. However, the expression of DNMTs in clinical samples across the spectrum of prostate cancer progression has not been studied before. Tissue microarrays were constructed from the prostatectomy specimens of 309 patients across the spectrum of prostate cancer progression: hormone-naïve low-grade prostate cancer (n=49), hormone-naïve high-grade prostate cancer (n=151), hormonally treated high-grade prostate cancer (n=65), and castrate-resistant prostate cancer (CRPC) including neuroendocrine carcinoma (n=44). Adjacent non-neoplastic parenchyma was also available in 100 patients. In 71 patients with high-grade carcinoma and lymph node metastasis, tissue from the metastasis was also available for analysis. Immunohistochemical staining was performed with antibodies against DNMT1, DNMT2, DNMT3A, DNMT3B, and DNMT3L. Our results showed that DNMT1 and DNMT3L were upregulated early in prostate cancer progression, whereas DNMT2 was upregulated as a response to androgen ablation. DNMT1, DNMT3A, and DNMT3B were higher in the late stages of prostate cancer progression, i.e., the emergence of castrate resistance and androgen-independent growth. Lastly, DNMT1, DNMT2, and DNMT3L were upregulated in lymph node metastases compared to primary carcinomas. Our results highlight a cascade of epigenetic events in prostate cancer progression.
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Affiliation(s)
- Vasiliki Tzelepi
- Department of Pathology, Medical School, University of Patras, Greece.
| | - Souzana Logotheti
- Department of Pathology, Medical School, University of Patras, Greece
| | - Eleni Efstathiou
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, USA
| | - Patricia Troncoso
- Department of Pathology, The University of Texas MD Anderson Cancer Center, USA
| | - Ana Aparicio
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, USA
| | - Minas Sakellakis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, USA
| | - Anh Hoang
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, USA
| | - Petros Perimenis
- Department of Urology, Medical School, University of Patras, Greece
| | - Maria Melachrinou
- Department of Pathology, Medical School, University of Patras, Greece
| | - Christopher Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, USA
| | - Vasiliki Zolota
- Department of Pathology, Medical School, University of Patras, Greece
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15
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Cali CP, Park DS, Lee EB. Targeted DNA methylation of neurodegenerative disease genes via homology directed repair. Nucleic Acids Res 2019; 47:11609-11622. [PMID: 31680172 PMCID: PMC7145628 DOI: 10.1093/nar/gkz979] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/18/2019] [Accepted: 10/11/2019] [Indexed: 12/13/2022] Open
Abstract
DNA methyltransferases (DNMTs) are thought to be involved in the cellular response to DNA damage, thus linking DNA repair mechanisms with DNA methylation. In this study we present Homology Assisted Repair Dependent Epigenetic eNgineering (HARDEN), a novel method of targeted DNA methylation that utilizes endogenous DNA double strand break repair pathways. This method allows for stable targeted DNA methylation through the process of homology directed repair (HDR) via an in vitro methylated exogenous repair template. We demonstrate that HARDEN can be applied to the neurodegenerative disease genes C9orf72 and APP, and methylation can be induced via HDR with both single and double stranded methylated repair templates. HARDEN allows for higher targeted DNA methylation levels than a dCas9-DNMT3a fusion protein construct at C9orf72, and genome-wide methylation analysis reveals no significant off-target methylation changes when inducing methylation via HARDEN, whereas the dCas9-DNMT3a fusion construct causes global off-target methylation. HARDEN is applied to generate a patient derived iPSC model of amyotrophic lateral sclerosis and frontotemporal dementia (ALS/FTD) that recapitulates DNA methylation patterns seen in patients, demonstrating that DNA methylation of the 5' regulatory region directly reduces C9orf72 expression and increases histone H3K9 tri-methylation levels.
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Affiliation(s)
- Christopher P Cali
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Daniel S Park
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Edward B Lee
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
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16
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Mlambo T, Nitsch S, Hildenbeutel M, Romito M, Müller M, Bossen C, Diederichs S, Cornu TI, Cathomen T, Mussolino C. Designer epigenome modifiers enable robust and sustained gene silencing in clinically relevant human cells. Nucleic Acids Res 2019. [PMID: 29538770 PMCID: PMC5961145 DOI: 10.1093/nar/gky171] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Targeted modulation of gene expression represents a valuable approach to understand the mechanisms governing gene regulation. In a therapeutic context, it can be exploited to selectively modify the aberrant expression of a disease-causing gene or to provide the target cells with a new function. Here, we have established a novel platform for achieving precision epigenome editing using designer epigenome modifiers (DEMs). DEMs combine in a single molecule a DNA binding domain based on highly specific transcription activator-like effectors (TALEs) and several effector domains capable of inducing DNA methylation and locally altering the chromatin structure to silence target gene expression. We designed DEMs to target two human genes, CCR5 and CXCR4, with the aim of epigenetically silencing their expression in primary human T lymphocytes. We observed robust and sustained target gene silencing associated with reduced chromatin accessibility, increased promoter methylation at the target sites and undetectable changes in global gene expression. Our results demonstrate that DEMs can be successfully used to silence target gene expression in primary human cells with remarkably high specificity, paving the way for the establishment of a potential new class of therapeutics.
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Affiliation(s)
- Tafadzwa Mlambo
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany.,Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Sandra Nitsch
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Markus Hildenbeutel
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany
| | - Marianna Romito
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Maximilian Müller
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Claudia Bossen
- Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany
| | - Sven Diederichs
- Division of Cancer Research, Department of Thoracic Surgery, Medical Center - University of Freiburg & German Cancer Consortium (DKTK), Freiburg, Germany & Division of RNA Biology & Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Tatjana I Cornu
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany
| | - Toni Cathomen
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany.,Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Claudio Mussolino
- Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, Freiburg, Germany.,Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Freiburg, Germany
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17
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D'Aloia MM, Zizzari IG, Sacchetti B, Pierelli L, Alimandi M. CAR-T cells: the long and winding road to solid tumors. Cell Death Dis 2018; 9:282. [PMID: 29449531 PMCID: PMC5833816 DOI: 10.1038/s41419-018-0278-6] [Citation(s) in RCA: 272] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 01/11/2023]
Abstract
Adoptive cell therapy of solid tumors with reprogrammed T cells can be considered the “next generation” of cancer hallmarks. CAR-T cells fail to be as effective as in liquid tumors for the inability to reach and survive in the microenvironment surrounding the neoplastic foci. The intricate net of cross-interactions occurring between tumor components, stromal and immune cells leads to an ineffective anergic status favoring the evasion from the host’s defenses. Our goal is hereby to trace the road imposed by solid tumors to CAR-T cells, highlighting pitfalls and strategies to be developed and refined to possibly overcome these hurdles.
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Affiliation(s)
- Maria Michela D'Aloia
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | | | | | - Luca Pierelli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Maurizio Alimandi
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy.
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18
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Kiełbus M, Czapiński J, Odrzywolski A, Stasiak G, Szymańska K, Kałafut J, Kos M, Giannopoulos K, Stepulak A, Rivero-Müller A. Optogenetics in cancer drug discovery. Expert Opin Drug Discov 2018; 13:459-472. [DOI: 10.1080/17460441.2018.1437138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Michał Kiełbus
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
- Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Adrian Odrzywolski
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Grażyna Stasiak
- Department of Experimental Haematooncology, Medical University of Lublin, Lublin, Poland
| | - Kamila Szymańska
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Michał Kos
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Krzysztof Giannopoulos
- Department of Experimental Haematooncology, Medical University of Lublin, Lublin, Poland
- Department of Hematology, St. John’s Cancer Center, Lublin, Poland
| | - Andrzej Stepulak
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
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19
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Wu DD, Song J, Bartel S, Krauss-Etschmann S, Rots MG, Hylkema MN. The potential for targeted rewriting of epigenetic marks in COPD as a new therapeutic approach. Pharmacol Ther 2018; 182:1-14. [PMID: 28830839 DOI: 10.1016/j.pharmthera.2017.08.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is an age and smoking related progressive, pulmonary disorder presenting with poorly reversible airflow limitation as a result of chronic bronchitis and emphysema. The prevalence, disease burden for the individual, and mortality of COPD continues to increase, whereas no effective treatment strategies are available. For many years now, a combination of bronchodilators and anti-inflammatory corticosteroids has been most widely used for therapeutic management of patients with persistent COPD. However, this approach has had disappointing results as a large number of COPD patients are corticosteroid resistant. In patients with COPD, there is emerging evidence showing aberrant expression of epigenetic marks such as DNA methylation, histone modifications and microRNAs in blood, sputum and lung tissue. Therefore, novel therapeutic approaches may exist using epigenetic therapy. This review aims to describe and summarize current knowledge of aberrant expression of epigenetic marks in COPD. In addition, tools available for restoration of epigenetic marks are described, as well as delivery mechanisms of epigenetic editors to cells. Targeting epigenetic marks might be a very promising tool for treatment and lung regeneration in COPD in the future.
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Affiliation(s)
- Dan-Dan Wu
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, GRIAC Research Institute, Groningen, The Netherlands; Laboratory of Cancer Biology and Epigenetics, Department of Cell Biology and Genetics, Shantou University Medical College, Shantou, Guangdong, P.R. China
| | - Juan Song
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, GRIAC Research Institute, Groningen, The Netherlands; Tianjin Medical University, School of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Department of Immunology, Tianjin, China
| | - Sabine Bartel
- Early Life Origins of Chronic Lung Disease, Priority Area Asthma & Allergy, Leibnitz Center for Medicine and Biosciences, Research Center Borstel and Christian Albrechts University Kiel; Airway Research Center North, member of the German Center for Lung Research (DZL), Germany
| | - Susanne Krauss-Etschmann
- Early Life Origins of Chronic Lung Disease, Priority Area Asthma & Allergy, Leibnitz Center for Medicine and Biosciences, Research Center Borstel and Christian Albrechts University Kiel; Airway Research Center North, member of the German Center for Lung Research (DZL), Germany
| | - Marianne G Rots
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, The Netherlands
| | - Machteld N Hylkema
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, The Netherlands; University of Groningen, University Medical Center Groningen, GRIAC Research Institute, Groningen, The Netherlands.
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20
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Waking up dormant tumor suppressor genes with zinc fingers, TALEs and the CRISPR/dCas9 system. Oncotarget 2018; 7:60535-60554. [PMID: 27528034 PMCID: PMC5312401 DOI: 10.18632/oncotarget.11142] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 07/19/2016] [Indexed: 12/24/2022] Open
Abstract
The aberrant epigenetic silencing of tumor suppressor genes (TSGs) plays a major role during carcinogenesis and regaining these dormant functions by engineering of sequence-specific epigenome editing tools offers a unique opportunity for targeted therapies. However, effectively normalizing the expression and regaining tumor suppressive functions of silenced TSGs by artificial transcription factors (ATFs) still remains a major challenge. Herein we describe novel combinatorial strategies for the potent reactivation of two class II TSGs, MASPIN and REPRIMO, in cell lines with varying epigenetic states, using the CRISPR/dCas9 associated system linked to a panel of effector domains (VP64, p300, VPR and SAM complex), as well as with protein-based ATFs, Zinc Fingers and TALEs. We found that co-delivery of multiple effector domains using a combination of CRISPR/dCas9 and TALEs or SAM complex maximized activation in highly methylated promoters. In particular, CRISPR/dCas9 VPR with SAM upregulated MASPIN mRNA (22,145-fold change) in H157 lung cancer cells, with accompanying re-expression of MASPIN protein, which led to a concomitant inhibition of cell proliferation and induction of apoptotic cell death. Consistently, CRISPR/dCas9 VP64 with SAM upregulated REPRIMO (680-fold change), which led to phenotypic reprogramming in AGS gastric cancer cells. Altogether, our results outlined novel sequence-specific, combinatorial epigenome editing approaches to reactivate highly methylated TSGs as a promising therapy for cancer and other diseases.
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21
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CRISPR/Cas9 therapeutics: a cure for cancer and other genetic diseases. Oncotarget 2018; 7:52541-52552. [PMID: 27250031 PMCID: PMC5239572 DOI: 10.18632/oncotarget.9646] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 05/19/2016] [Indexed: 12/21/2022] Open
Abstract
Cancer is caused by a series of alterations in genome and epigenome mostly resulting in activation of oncogenes or inactivation of cancer suppressor genes. Genetic engineering has become pivotal in the treatment of cancer and other genetic diseases, especially the formerly-niche use of clustered regularly interspaced short palindromic repeats (CRISPR) associated with Cas9. In defining its superior use, we have followed the recent advances that have been made in producing CRISPR/Cas9 as a therapy of choice. We also provide important genetic mutations where CRISPRs can be repurposed to create adaptive immunity to fight carcinomas and edit genetic mutations causing it. Meanwhile, challenges to CRISPR technology are also discussed with emphasis on ability of pathogens to evolve against CRISPRs. We follow the recent developments on the function of CRISPRs with different carriers which can efficiently deliver it to target cells; furthermore, analogous technologies are also discussed along CRISPRs, including zinc-finger nuclease (ZFN) and transcription activator-like effector nucleases (TALENs). Moreover, progress in clinical applications of CRISPR therapeutics is reviewed; in effect, patients can have lower morbidity and/or mortality from the therapeutic method with least possible side-effects.
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22
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Kretzmann JA, Evans CW, Norret M, Blancafort P, Swaminathan Iyer K. Non-viral Methodology for Efficient Co-transfection. Methods Mol Biol 2018. [PMID: 29524139 DOI: 10.1007/978-1-4939-7774-1_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The potential impact of CRISPR/Cas9, TALE, and zinc finger technology is immense, both with respect to their use as tools for understanding the roles and functions of the genomic elements and epigenome modifications in an endogenous context and as new methods for treatment of diseases. Application of such technologies has drawn attention, however, to the prevailing lack of effective delivery methods. Promising viral and non-viral methods both currently fall short when the efficient delivery of large plasmids or multiple plasmids is required. Therefore, the use of TALE and CRISPR platforms has been severely limited in applications where selection methods to increase the relative proportion of treated cells are not applicable, and it represents a significant bottleneck in the further application of these tools as therapeutics.The protocol presented here describes the synthesis of a dendronized polymer as a highly efficient and nontoxic transfection agent. Furthermore, the optimization of the polymer as a co-transfection reagent for large and multiple plasmids in cell lines is described, in addition to general considerations for co-transfection experiments. Usage of this method has allowed for significantly improved large plasmid co-transfection efficiency over Lipofectamine 2000 in multiple cell lines, allowing an improved delivery of CRISPR/dCas9 and TALE systems.
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Affiliation(s)
- Jessica A Kretzmann
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
- Cancer Epigenetics Group, Harry Perkins Institute of Medical Research, Nedlands, WA, Australia
| | - Cameron W Evans
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Marck Norret
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Pilar Blancafort
- Cancer Epigenetics Group, Harry Perkins Institute of Medical Research, Nedlands, WA, Australia.
- School of Human Sciences, The University of Western Australia, Perth, WA, Australia.
| | - K Swaminathan Iyer
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia.
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23
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Bustos FJ, Ampuero E, Jury N, Aguilar R, Falahi F, Toledo J, Ahumada J, Lata J, Cubillos P, Henríquez B, Guerra MV, Stehberg J, Neve RL, Inestrosa NC, Wyneken U, Fuenzalida M, Härtel S, Sena-Esteves M, Varela-Nallar L, Rots MG, Montecino M, van Zundert B. Epigenetic editing of the Dlg4/PSD95 gene improves cognition in aged and Alzheimer's disease mice. Brain 2017; 140:3252-3268. [PMID: 29155979 DOI: 10.1093/brain/awx272] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 08/27/2017] [Indexed: 12/31/2022] Open
Abstract
The Dlg4 gene encodes for post-synaptic density protein 95 (PSD95), a major synaptic protein that clusters glutamate receptors and is critical for plasticity. PSD95 levels are diminished in ageing and neurodegenerative disorders, including Alzheimer's disease and Huntington's disease. The epigenetic mechanisms that (dys)regulate transcription of Dlg4/PSD95, or other plasticity genes, are largely unknown, limiting the development of targeted epigenome therapy. We analysed the Dlg4/PSD95 epigenetic landscape in hippocampal tissue and designed a Dlg4/PSD95 gene-targeting strategy: a Dlg4/PSD95 zinc finger DNA-binding domain was engineered and fused to effector domains to either repress (G9a, Suvdel76, SKD) or activate (VP64) transcription, generating artificial transcription factors or epigenetic editors (methylating H3K9). These epi-editors altered critical histone marks and subsequently Dlg4/PSD95 expression, which, importantly, impacted several hippocampal neuron plasticity processes. Intriguingly, transduction of the artificial transcription factor PSD95-VP64 rescued memory deficits in aged and Alzheimer's disease mice. Conclusively, this work validates PSD95 as a key player in memory and establishes epigenetic editing as a potential therapy to treat human neurological disorders.
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Affiliation(s)
- Fernando J Bustos
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile.,FONDAP Center for Genome Regulation, Chile
| | - Estibaliz Ampuero
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Nur Jury
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Rodrigo Aguilar
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile.,FONDAP Center for Genome Regulation, Chile
| | - Fahimeh Falahi
- University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jorge Toledo
- Anatomy and Developmental Biology, SCIAN-Lab, Institute of Biomedical Sciences, Biomedical Neuroscience Institute, Center for Medical Informatics and Telemedicine CIMT, National Center for Health Information Systems CENS, Santiago, Chile.,Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Juan Ahumada
- Centro de Neurobiología y Plasticidad Cerebral, Departamento de Fisiología, Facultad de Ciencias, Universidad Valparaíso, Chile
| | - Jaclyn Lata
- Department of Neurology and Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA
| | - Paula Cubillos
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Berta Henríquez
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Miguel V Guerra
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Jimmy Stehberg
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Rachael L Neve
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Nibaldo C Inestrosa
- CARE Biomedical Research Center, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Chile
| | - Ursula Wyneken
- Laboratorio de Neurociencias, Universidad de Los Andes, Santiago, Chile
| | - Marco Fuenzalida
- Centro de Neurobiología y Plasticidad Cerebral, Departamento de Fisiología, Facultad de Ciencias, Universidad Valparaíso, Chile
| | - Steffen Härtel
- Anatomy and Developmental Biology, SCIAN-Lab, Institute of Biomedical Sciences, Biomedical Neuroscience Institute, Center for Medical Informatics and Telemedicine CIMT, National Center for Health Information Systems CENS, Santiago, Chile.,Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Miguel Sena-Esteves
- Department of Neurology and Horae Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA, USA
| | - Lorena Varela-Nallar
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
| | - Marianne G Rots
- University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Martin Montecino
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile.,FONDAP Center for Genome Regulation, Chile
| | - Brigitte van Zundert
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello, Avenida Republica 217, Santiago, Chile
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24
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O'Geen H, Ren C, Nicolet CM, Perez AA, Halmai J, Le VM, Mackay JP, Farnham PJ, Segal DJ. dCas9-based epigenome editing suggests acquisition of histone methylation is not sufficient for target gene repression. Nucleic Acids Res 2017; 45:9901-9916. [PMID: 28973434 PMCID: PMC5622328 DOI: 10.1093/nar/gkx578] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 06/28/2017] [Indexed: 12/19/2022] Open
Abstract
Distinct epigenomic profiles of histone marks have been associated with gene expression, but questions regarding the causal relationship remain. Here we investigated the activity of a broad collection of genomically targeted epigenetic regulators that could write epigenetic marks associated with a repressed chromatin state (G9A, SUV39H1, Krüppel-associated box (KRAB), DNMT3A as well as the first targetable versions of Ezh2 and Friend of GATA-1 (FOG1)). dCas9 fusions produced target gene repression over a range of 0- to 10-fold that varied by locus and cell type. dCpf1 fusions were unable to repress gene expression. The most persistent gene repression required the action of several effector domains; however, KRAB-dCas9 did not contribute to persistence in contrast to previous reports. A ‘direct tethering’ strategy attaching the Ezh2 methyltransferase enzyme to dCas9, as well as a ‘recruitment’ strategy attaching the N-terminal 45 residues of FOG1 to dCas9 to recruit the endogenous nucleosome remodeling and deacetylase complex, were both successful in targeted deposition of H3K27me3. Surprisingly, however, repression was not correlated with deposition of either H3K9me3 or H3K27me3. Our results suggest that so-called repressive histone modifications are not sufficient for gene repression. The easily programmable dCas9 toolkit allowed precise control of epigenetic information and dissection of the relationship between the epigenome and gene regulation.
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Affiliation(s)
- Henriette O'Geen
- Genome Center and Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA
| | - Chonghua Ren
- Genome Center and Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA.,Guangzhou Key Laboratory of Insect Development Regulation and Application Research, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Charles M Nicolet
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Andrew A Perez
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - Julian Halmai
- Genome Center and Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA
| | - Victoria M Le
- Genome Center and Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA
| | - Joel P Mackay
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Peggy J Farnham
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA
| | - David J Segal
- Genome Center and Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA
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25
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Targeting Heat Shock Proteins in Cancer: A Promising Therapeutic Approach. Int J Mol Sci 2017; 18:ijms18091978. [PMID: 28914774 PMCID: PMC5618627 DOI: 10.3390/ijms18091978] [Citation(s) in RCA: 307] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 12/12/2022] Open
Abstract
Heat shock proteins (HSPs) are a large family of chaperones that are involved in protein folding and maturation of a variety of "client" proteins protecting them from degradation, oxidative stress, hypoxia, and thermal stress. Hence, they are significant regulators of cellular proliferation, differentiation and strongly implicated in the molecular orchestration of cancer development and progression as many of their clients are well established oncoproteins in multiple tumor types. Interestingly, tumor cells are more HSP chaperonage-dependent than normal cells for proliferation and survival because the oncoproteins in cancer cells are often misfolded and require augmented chaperonage activity for correction. This led to the development of several inhibitors of HSP90 and other HSPs that have shown promise both preclinically and clinically in the treatment of cancer. In this article, we comprehensively review the roles of some of the important HSPs in cancer, and how targeting them could be efficacious, especially when traditional cancer therapies fail.
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Mussolino C, Alzubi J, Pennucci V, Turchiano G, Cathomen T. Genome and Epigenome Editing to Treat Disorders of the Hematopoietic System. Hum Gene Ther 2017; 28:1105-1115. [PMID: 28806883 DOI: 10.1089/hum.2017.149] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The possibility of editing complex genomes in a targeted fashion has revolutionized basic research as well as biomedical and biotechnological applications in the last 5 years. The targeted introduction of genetic changes has allowed researchers to create smart model systems for basic research, bio-engineers to modify crops and farm animals, and translational scientists to develop novel treatment approaches for inherited and acquired disorders for which curative treatment options are not yet available. With the rapid development of genome editing tools, in particular zinc-finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and the CRISPR-Cas system, a wide range of therapeutic options have been-and will be-developed at an unprecedented speed, which will change the clinical routine of various disciplines in a revolutionary way. This review summarizes the fundamentals of genome editing and the current state of research. It particularly focuses on the advances made in employing engineered nucleases in hematopoietic stem cells for the treatment of primary immunodeficiencies and hemoglobinopathies, provides a perspective of combining gene editing with the chimeric antigen receptor T cell technology, and concludes by presenting targeted epigenome editing as a novel potential treatment option.
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Affiliation(s)
- Claudio Mussolino
- 1 Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg , Germany .,2 Center for Chronic Immunodeficiency, Medical Center - University of Freiburg , Germany
| | - Jamal Alzubi
- 1 Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg , Germany .,2 Center for Chronic Immunodeficiency, Medical Center - University of Freiburg , Germany
| | - Valentina Pennucci
- 1 Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg , Germany .,2 Center for Chronic Immunodeficiency, Medical Center - University of Freiburg , Germany
| | - Giandomenico Turchiano
- 1 Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg , Germany .,2 Center for Chronic Immunodeficiency, Medical Center - University of Freiburg , Germany
| | - Toni Cathomen
- 1 Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg , Germany .,2 Center for Chronic Immunodeficiency, Medical Center - University of Freiburg , Germany .,3 Faculty of Medicine, University of Freiburg , Freiburg, Germany
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Wardhani BW, Puteri MU, Watanabe Y, Louisa M, Setiabudy R, Kato M. TMEPAI genome editing in triple negative breast cancer cells. MEDICAL JOURNAL OF INDONESIA 2017. [DOI: 10.13181/mji.v26i1.1871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Background: Clustered regularly interspaced short palindromic repeats/CRISPR-associated 9 (CRISPR/Cas9) is a powerful genome editing technique. It consists of RNA-guided DNA endonuclease Cas9 and single guide RNA (gRNA). By combining their expressions, high efficiency cleavage of the target gene can be achieved, leading to the formation of DNA double-strand break (DSB) at the genomic locus of interest which will be repaired via NHEJ (non-homologous end joining) or HDR (homology-directed repair) and mediate DNA alteration. We aimed to apply the CRISPR/Cas9 technique to knock-out the transmembrane prostate androgen-induced protein (TMEPAI) gene in the triple negative breast cancer cell line.Methods: Designed gRNA which targets the TMEPAI gene was synthesized, annealed, and cloned into gRNA expression vector. It was co-transfected into the TNBC cell line using polyethylenimine (PEI) together with Cas9-GFP and puromycin resistant gene vector. At 24-hours post-transfection, cells were selected by puromycin for 3 days before they were cloned. Selected knock-out clones were subsequently checked on their protein levels by western blotting.Results: CRISPR/Cas9, a genome engineering technique successfully knocked-out TMEPAI in the Hs578T TNBC cell line. Sequencing shows a frameshift mutation in TMEPAI. Western blot shows the absence of TMEPAI band on Hs578T KO cells.Conclusion: TMEPAI gene was deleted in the TNBC cell line using the genomic editing technique CRISPR/Cas9. The deletion was confirmed by genome and protein analysis.
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Goubert D, Beckman WF, Verschure PJ, Rots MG. Epigenetic editing: towards realization of the curable genome concept. CONVERGENT SCIENCE PHYSICAL ONCOLOGY 2017. [DOI: 10.1088/2057-1739/aa5cc0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Kyono Y, Sachs LM, Bilesimo P, Wen L, Denver RJ. Developmental and Thyroid Hormone Regulation of the DNA Methyltransferase 3a Gene in Xenopus Tadpoles. Endocrinology 2016; 157:4961-4972. [PMID: 27779916 PMCID: PMC5133355 DOI: 10.1210/en.2016-1465] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 10/21/2016] [Indexed: 11/19/2022]
Abstract
Thyroid hormone is essential for normal development in vertebrates. In amphibians, T3 controls metamorphosis by inducing tissue-specific gene regulation programs. A hallmark of T3 action is the modification of chromatin structure, which underlies changes in gene transcription. We found that mRNA for the de novo DNA methyltransferase (DNMT) dnmt3a, but not dnmt1, increased in the brain of Xenopus tadpoles during metamorphosis in parallel with plasma [T3]. Addition of T3 to the rearing water caused a time-dependent increase in dnmt3a mRNA in tadpole brain, tail, and hind limb. By analyzing data from a genome-wide analysis of T3 receptor (TR) binding in tadpole tail, we identified several putative T3 response elements (TREs) within the dnmt3a locus. Using in vitro DNA binding, transient transfection-reporter, and chromatin immunoprecipitation assays for TRs, we identified two functional TREs at -7.1 kb and +5.1 kb relative to the dnmt3a transcription start site. Sequence alignment showed that these TREs are conserved between two related frog species, X. laevis and X. tropicalis, but not with amniotes. Our previous findings showed that this gene is directly regulated by liganded TRs in mouse brain, and whereas the two mouse TREs are conserved among Eutherian mammals, they are not conserved in Xenopus species. Thus, although T3 regulation of dnmt3a may be an ancient pathway in vertebrates, the genomic sites responsible for hormone regulation may have diverged or arisen by convergent evolution. We hypothesize that direct T3 regulation of dnmt3a may be an important mechanism for modulating global changes in DNA methylation.
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Affiliation(s)
- Yasuhiro Kyono
- Neuroscience Graduate Program (Y.K.), The University of Michigan, Ann Arbor, Michigan 48109-1048; UMR-7221, Centre National de la Recherche Scientifique (L.M.S., P.B.), Muséum National d'Histoire Naturelle, 75005 Paris, France; and Department of Molecular, Cellular, and Developmental Biology (L.W., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109-1048
| | - Laurent M Sachs
- Neuroscience Graduate Program (Y.K.), The University of Michigan, Ann Arbor, Michigan 48109-1048; UMR-7221, Centre National de la Recherche Scientifique (L.M.S., P.B.), Muséum National d'Histoire Naturelle, 75005 Paris, France; and Department of Molecular, Cellular, and Developmental Biology (L.W., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109-1048
| | - Patrice Bilesimo
- Neuroscience Graduate Program (Y.K.), The University of Michigan, Ann Arbor, Michigan 48109-1048; UMR-7221, Centre National de la Recherche Scientifique (L.M.S., P.B.), Muséum National d'Histoire Naturelle, 75005 Paris, France; and Department of Molecular, Cellular, and Developmental Biology (L.W., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109-1048
| | - Luan Wen
- Neuroscience Graduate Program (Y.K.), The University of Michigan, Ann Arbor, Michigan 48109-1048; UMR-7221, Centre National de la Recherche Scientifique (L.M.S., P.B.), Muséum National d'Histoire Naturelle, 75005 Paris, France; and Department of Molecular, Cellular, and Developmental Biology (L.W., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109-1048
| | - Robert J Denver
- Neuroscience Graduate Program (Y.K.), The University of Michigan, Ann Arbor, Michigan 48109-1048; UMR-7221, Centre National de la Recherche Scientifique (L.M.S., P.B.), Muséum National d'Histoire Naturelle, 75005 Paris, France; and Department of Molecular, Cellular, and Developmental Biology (L.W., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109-1048
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Epigenomic engineering for Down syndrome. Neurosci Biobehav Rev 2016; 71:323-327. [DOI: 10.1016/j.neubiorev.2016.09.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 08/11/2016] [Accepted: 09/15/2016] [Indexed: 12/27/2022]
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Wu L, Shen Y, Peng X, Zhang S, Wang M, Xu G, Zheng X, Wang J, Lu C. Aberrant promoter methylation of cancer-related genes in human breast cancer. Oncol Lett 2016; 12:5145-5155. [PMID: 28105221 PMCID: PMC5228392 DOI: 10.3892/ol.2016.5351] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 10/18/2016] [Indexed: 12/15/2022] Open
Abstract
The clinical relevance of aberrant DNA methylation is being increasingly recognized in breast cancer. The present study aimed to evaluate the promoter methylation status of seven candidate genes and to explore their potential use as a biomarker for the diagnosis of breast cancer. A total of 70 Chinese patients with breast cancer were recruited, and matched with 20 patients with benign breast disease (BBD). Methylation-specific polymerase chain reaction was performed to measure the methylation status of selected genes. The protein expression of candidate genes was determined by immunohistochemistry. Hypermethylation of Breast cancer 1, early onset; DNA repair associated (BRCA1), glutathione S-transferase pi 1 (GSTP1), cyclin dependent kinase inhibitor 2A, O-6-methylguanine-DNA methyltransferase, phosphatase and tensin homolog, retinoic acid receptor beta 2 and cyclin D2 was observed to be more common in cancerous tissues (24.3, 31.4, 40.0, 27.1, 48.6, 55.7 and 67.1%, respectively) as compared with BBD controls (0.0, 0.0, 20.0, 25.0, 40.0, 40.0 and 45.0%, respectively). Immunohistochemical analysis demonstrated a correlation between the methylation of the target gene and downregulation of protein expression. When BRCA1 and GSTP1 were combined as the biomarker, the area under the receiver operating characteristic curve reached 0.721 (95% confidence interval, 0.616–0.827). The present findings indicated that promoter methylation of cancer-related genes was frequently observed in patients with breast cancer and was associated with various clinical features. Hypermethylation of BRCA1 and GSTP1 may be used as promising biomarkers for breast cancer.
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Affiliation(s)
- Liang Wu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Ye Shen
- Department of Gastrointestinal Surgery, Aoyoung Hospital, Zhangjiagang, Jiangsu 215617, P.R. China
| | - Xianzhen Peng
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Simin Zhang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Ming Wang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Guisheng Xu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Xianzhi Zheng
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Jianming Wang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China; Department of Social Medicine and Health Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, 211166, P.R. China; The Innovation Center for Social Risk Governance in Health, Nanjing, Jiangsu, 211166, P.R. China
| | - Cheng Lu
- Department of Breast, Nanjing Maternity and Child Health Hospital of Nanjing Medical University, Nanjing, Jiangsu 210004, P.R. China
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Shabbir MAB, Hao H, Shabbir MZ, Hussain HI, Iqbal Z, Ahmed S, Sattar A, Iqbal M, Li J, Yuan Z. Survival and Evolution of CRISPR-Cas System in Prokaryotes and Its Applications. Front Immunol 2016; 7:375. [PMID: 27725818 PMCID: PMC5035730 DOI: 10.3389/fimmu.2016.00375] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 09/07/2016] [Indexed: 12/12/2022] Open
Abstract
Prokaryotes have developed numerous innate immune mechanisms in order to fend off bacteriophage or plasmid attack. One of these immune systems is clustered regularly interspaced short palindromic repeats (CRISPR). CRISPR-associated proteins play a key role in survival of prokaryotes against invaders, as these systems cleave DNA of foreign genetic elements. Beyond providing immunity, these systems have significant impact in altering the bacterial physiology in term of its virulence and pathogenicity, as well as evolution. Also, due to their diverse nature of functionality, cas9 endoribonuclease can be easily reprogrammed with the help of guide RNAs, showing unprecedented potential and significance for gene editing in treating genetic diseases. Here, we also discuss the use of NgAgo–gDNA system in genome editing of human cells.
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Affiliation(s)
- Muhammad Abu Bakr Shabbir
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Haihong Hao
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Muhammad Zubair Shabbir
- Quality Operations Laboratory at University of Veterinary and Animal Sciences Lahore , Pakistan
| | - Hafiz Iftikhar Hussain
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Zahid Iqbal
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Saeed Ahmed
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Adeel Sattar
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Huazhong Agricultural University, Wuhan, China; MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, China
| | - Mujahid Iqbal
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Huazhong Agricultural University, Wuhan, China; MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, China
| | - Jun Li
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University , Wuhan , China
| | - Zonghui Yuan
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, China; National Reference Laboratory of Veterinary Drug Residues (HZAU), Huazhong Agricultural University, Wuhan, China; MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, China
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Kyono Y, Subramani A, Ramadoss P, Hollenberg AN, Bonett RM, Denver RJ. Liganded Thyroid Hormone Receptors Transactivate the DNA Methyltransferase 3a Gene in Mouse Neuronal Cells. Endocrinology 2016; 157:3647-57. [PMID: 27387481 PMCID: PMC5007891 DOI: 10.1210/en.2015-1529] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 07/01/2016] [Indexed: 12/11/2022]
Abstract
Thyroid hormone (T3) is essential for proper neurological development. The hormone, bound to its receptors, regulates gene transcription in part by modulating posttranslational modifications of histones. Methylation of DNA, which is established by the de novo DNA methyltransferase (DNMT)3a and DNMT3b, and maintained by DNMT1 is another epigenetic modification influencing gene transcription. The expression of Dnmt3a, but not other Dnmt genes, increases in mouse brain in parallel with the postnatal rise in plasma [T3]. We found that treatment of the mouse neuroblastoma cell line Neuro2a[TRβ1] with T3 caused rapid induction of Dnmt3a mRNA, which was resistant to protein synthesis inhibition, supporting that it is a direct T3-response gene. Injection of T3 into postnatal day 6 mice increased Dnmt3a mRNA in the brain by 1 hour. Analysis of two chromatin immunoprecipitation-sequencing datasets, and targeted analyses using chromatin immunoprecipitation, transfection-reporter assays, and in vitro DNA binding identified 2 functional T3-response elements (TREs) at the mouse Dnmt3a locus located +30.3 and +49.3 kb from the transcription start site. Thyroid hormone receptors associated with both of these regions in mouse brain chromatin, but with only 1 (+30.3 kb) in Neuro2a[TRβ1] cells. Deletion of the +30.3-kb TRE using CRISPR/Cas9 genome editing eliminated or strongly reduced the Dnmt3a mRNA response to T3. Bioinformatics analysis showed that both TREs are highly conserved among eutherian mammals. Thyroid regulation of Dnmt3a may be an evolutionarily conserved mechanism for modulating global changes in DNA methylation during postnatal neurological development.
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Affiliation(s)
- Yasuhiro Kyono
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
| | - Arasakumar Subramani
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
| | - Preeti Ramadoss
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
| | - Anthony N Hollenberg
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
| | - Ronald M Bonett
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
| | - Robert J Denver
- Neuroscience Graduate Program (Y.K., R.J.D.) and Department of Molecular, Cellular and Developmental Biology (A.S., R.J.D.), The University of Michigan, Ann Arbor, Michigan 48109; Division of Endocrinology, Diabetes and Metabolism (P.R., A.N.H.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02115; and Department of Biological Science (R.M.B.), The University of Tulsa, Tulsa, Oklahoma 74104
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Abstract
We are entering an era of epigenome engineering. The precision manipulation of chromatin and epigenetic modifications provides new ways to interrogate their influence on genome and cell function and to harness these changes for applications. We review the design and state of epigenome editing tools, highlighting the unique regulatory properties afforded by these systems.
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Affiliation(s)
- Minhee Park
- Department of Biomedical Engineering and Biological Design Center, Boston University, Boston, MA, 02215, USA
| | - Albert J Keung
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA
| | - Ahmad S Khalil
- Department of Biomedical Engineering and Biological Design Center, Boston University, Boston, MA, 02215, USA. .,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, 02115, USA.
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Writing of H3K4Me3 overcomes epigenetic silencing in a sustained but context-dependent manner. Nat Commun 2016; 7:12284. [PMID: 27506838 PMCID: PMC4987519 DOI: 10.1038/ncomms12284] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 06/20/2016] [Indexed: 02/06/2023] Open
Abstract
Histone modifications reflect gene activity, but the relationship between cause and consequence of transcriptional control is heavily debated. Recent developments in rewriting local histone codes of endogenous genes elucidated instructiveness of certain marks in regulating gene expression. Maintenance of such repressive epigenome editing is controversial, while stable reactivation is still largely unexplored. Here we demonstrate sustained gene re-expression using two types of engineered DNA-binding domains fused to a H3K4 methyltransferase. Local induction of H3K4me3 is sufficient to allow re-expression of silenced target genes in various cell types. Maintenance of the re-expression is achieved, but strongly depends on the chromatin microenvironment (that is, DNA methylation status). We further identify H3K79me to be essential in allowing stable gene re-expression, confirming its role in epigenetic crosstalk for stable reactivation. Our approach uncovers potent epigenetic modifications to be directly written onto genomic loci to stably activate any given gene.
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Generalized nucleation and looping model for epigenetic memory of histone modifications. Proc Natl Acad Sci U S A 2016; 113:E4180-9. [PMID: 27382173 DOI: 10.1073/pnas.1605862113] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Histone modifications can redistribute along the genome in a sequence-independent manner, giving rise to chromatin position effects and epigenetic memory. The underlying mechanisms shape the endogenous chromatin landscape and determine its response to ectopically targeted histone modifiers. Here, we simulate linear and looping-driven spreading of histone modifications and compare both models to recent experiments on histone methylation in fission yeast. We find that a generalized nucleation-and-looping mechanism describes key observations on engineered and endogenous methylation domains including intrinsic spatial confinement, independent regulation of domain size and memory, variegation in the absence of antagonists, and coexistence of short- and long-term memory at loci with weak and strong constitutive nucleation. These findings support a straightforward relationship between the biochemical properties of chromatin modifiers and the spatiotemporal modification pattern. The proposed mechanism gives rise to a phase diagram for cellular memory that may be generally applicable to explain epigenetic phenomena across different species.
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Mulder CL, Zheng Y, Jan SZ, Struijk RB, Repping S, Hamer G, van Pelt AMM. Spermatogonial stem cell autotransplantation and germline genomic editing: a future cure for spermatogenic failure and prevention of transmission of genomic diseases. Hum Reprod Update 2016; 22:561-73. [PMID: 27240817 PMCID: PMC5001497 DOI: 10.1093/humupd/dmw017] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/28/2016] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Subfertility affects approximately 15% of all couples, and a severe male factor is identified in 17% of these couples. While the etiology of a severe male factor remains largely unknown, prior gonadotoxic treatment and genomic aberrations have been associated with this type of subfertility. Couples with a severe male factor can resort to ICSI, with either ejaculated spermatozoa (in case of oligozoospermia) or surgically retrieved testicular spermatozoa (in case of azoospermia) to generate their own biological children. Currently there is no direct treatment for azoospermia or oligozoospermia. Spermatogonial stem cell (SSC) autotransplantation (SSCT) is a promising novel clinical application currently under development to restore fertility in sterile childhood cancer survivors. Meanwhile, recent advances in genomic editing, especially the clustered regulatory interspaced short palindromic repeats-associated protein 9 (CRISPR-Cas9) system, are likely to enable genomic rectification of human SSCs in the near future. OBJECTIVE AND RATIONALE The objective of this review is to provide insights into the prospects of the potential clinical application of SSCT with or without genomic editing to cure spermatogenic failure and to prevent transmission of genetic diseases. SEARCH METHODS We performed a narrative review using the literature available on PubMed not restricted to any publishing year on topics of subfertility, fertility treatments, (molecular regulation of) spermatogenesis and SSCT, inherited (genetic) disorders, prenatal screening methods, genomic editing and germline editing. For germline editing, we focussed on the novel CRISPR-Cas9 system. We included papers written in English only. OUTCOMES Current techniques allow propagation of human SSCs in vitro, which is indispensable to successful transplantation. This technique is currently being developed in a preclinical setting for childhood cancer survivors who have stored a testis biopsy prior to cancer treatment. Similarly, SSCT could be used to restore fertility in sterile adult cancer survivors. In vitro propagation of SSCs might also be employed to enhance spermatogenesis in oligozoospermic men and in azoospermic men who still have functional SSCs albeit in insufficient numbers. The combination of SSCT with genomic editing techniques could potentially rectify defects in spermatogenesis caused by genomic mutations or, more broadly, prevent transmission of genomic diseases to the offspring. In spite of the promising prospects, SSCT and germline genomic editing are not yet clinically applicable and both techniques require optimization at various levels. WIDER IMPLICATIONS SSCT with or without genomic editing could potentially be used to restore fertility in cancer survivors to treat couples with a severe male factor and to prevent the paternal transmission of diseases. This will potentially allow these couples to have their own biological children. Technical development is progressing rapidly, and ethical reflection and societal debate on the use of SSCT with or without genomic editing is pressing.
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Affiliation(s)
- Callista L Mulder
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Yi Zheng
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Sabrina Z Jan
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Robert B Struijk
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Sjoerd Repping
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Geert Hamer
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Ans M M van Pelt
- Center for Reproductive Medicine, Amsterdam Research Institute Reproduction and Development, Academic Medical Centre, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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Mio C, Lavarone E, Conzatti K, Baldan F, Toffoletto B, Puppin C, Filetti S, Durante C, Russo D, Orlacchio A, Di Cristofano A, Di Loreto C, Damante G. MCM5 as a target of BET inhibitors in thyroid cancer cells. Endocr Relat Cancer 2016; 23:335-47. [PMID: 26911376 PMCID: PMC4891972 DOI: 10.1530/erc-15-0322] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 02/24/2016] [Indexed: 12/21/2022]
Abstract
Anaplastic thyroid carcinoma (ATC) is an extremely aggressive thyroid cancer subtype, refractory to the current medical treatment. Among various epigenetic anticancer drugs, bromodomain and extra-terminal inhibitors (BETis) are considered to be an appealing novel class of compounds. BETi target the bromodomain and extra-terminal of BET proteins that act as regulators of gene transcription, interacting with histone acetyl groups. The goal of this study is to delineate which pathway underlies the biological effects derived from BET inhibition, in order to find new potential therapeutic targets in ATC. We investigated the effects of BET inhibition on two human anaplastic thyroid cancer-derived cell lines (FRO and SW1736). The treatment with two BETis, JQ1 and I-BET762, decreased cell viability, reduced cell cycle S-phase, and determined cell death. In order to find BETi effectors, FRO and SW1736 were subjected to a global transcriptome analysis after JQ1 treatment. A significant portion of deregulated genes belongs to cell cycle regulators. Among them, MCM5 was decreased at both mRNA and protein levels in both tested cell lines. Chromatin immunoprecipitation (ChIP) experiments indicate that MCM5 is directly bound by the BET protein BRD4. MCM5 silencing reduced cell proliferation, thus underlining its involvement in the block of proliferation induced by BETis. Furthermore, MCM5 immunohistochemical evaluation in human thyroid tumor tissues demonstrated its overexpression in several papillary thyroid carcinomas and in all ATCs. MCM5 was also overexpressed in a murine model of ATC, and JQ1 treatment reduced Mcm5 mRNA expression in two murine ATC cell lines. Thus, MCM5 could represent a new target in the therapeutic approach against ATC.
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Affiliation(s)
- Catia Mio
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Elisa Lavarone
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Ketty Conzatti
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Federica Baldan
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Barbara Toffoletto
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Cinzia Puppin
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Sebastiano Filetti
- Department of Internal Medicine and Medical SpecialtiesUniversity 'Sapienza', Rome, Italy
| | - Cosimo Durante
- Department of Internal Medicine and Medical SpecialtiesUniversity 'Sapienza', Rome, Italy
| | - Diego Russo
- Department of Health SciencesUniversity of Catanzaro 'Magna Graecia', Catanzaro, Italy
| | - Arturo Orlacchio
- Department of Developmental and Molecular BiologyAlbert Einstein College of Medicine, Bronx, New York, USA
| | - Antonio Di Cristofano
- Department of Developmental and Molecular BiologyAlbert Einstein College of Medicine, Bronx, New York, USA
| | - Carla Di Loreto
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
| | - Giuseppe Damante
- Department of Medical and Biological SciencesUniversity of Udine, Udine, Italy
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39
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Heylen L, Thienpont B, Naesens M, Lambrechts D, Sprangers B. The Emerging Role of DNA Methylation in Kidney Transplantation: A Perspective. Am J Transplant 2016; 16:1070-8. [PMID: 26780242 DOI: 10.1111/ajt.13585] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 09/28/2015] [Accepted: 10/14/2015] [Indexed: 01/25/2023]
Abstract
Allograft outcome depends on a range of factors, including donor age, the allo-immune response, ischemia-reperfusion injury, and interstitial fibrosis of the allograft. Changes in the epigenome, and in DNA methylation in particular, have been implicated in each of these processes, in either the kidney or other organ systems. This review provides a primer for DNA methylation analyses and a discussion of the strengths and weaknesses of current studies, but it is also a perspective for future DNA methylation research in kidney transplantation. We present exciting prospects for leveraging DNA methylation analyses as a tool in kidney biology research, and as a diagnostic or prognostic marker for predicting allograft quality and success. Topics discussed include DNA methylation changes in aging and in response to hypoxia and oxidative stress upon ischemia-reperfusion injury. Moreover, emerging evidence suggests that DNA methylation contributes to organ fibrosis and that systemic DNA methylation alterations correlate with the rate of kidney function decline in patients with chronic kidney disease and end-stage renal failure. Monitoring or targeting the epigenome could therefore reveal novel therapeutic approaches in transplantation and open up paths to biomarker discovery and targeted therapy.
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Affiliation(s)
- L Heylen
- Department of Nephrology and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium.,Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium.,Laboratory of Translational Genetics, Department of Oncology, KU Leuven, Leuven, Belgium.,Vesalius Research Center, VIB, Leuven, Belgium
| | - B Thienpont
- Laboratory of Translational Genetics, Department of Oncology, KU Leuven, Leuven, Belgium.,Vesalius Research Center, VIB, Leuven, Belgium
| | - M Naesens
- Department of Nephrology and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium.,Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium
| | - D Lambrechts
- Laboratory of Translational Genetics, Department of Oncology, KU Leuven, Leuven, Belgium.,Vesalius Research Center, VIB, Leuven, Belgium
| | - B Sprangers
- Department of Nephrology and Renal Transplantation, University Hospitals Leuven, Leuven, Belgium.,Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium
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40
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Bailus BJ, Pyles B, McAlister MM, O'Geen H, Lockwood SH, Adams AN, Nguyen JTT, Yu A, Berman RF, Segal DJ. Protein Delivery of an Artificial Transcription Factor Restores Widespread Ube3a Expression in an Angelman Syndrome Mouse Brain. Mol Ther 2016; 24:548-55. [PMID: 26727042 PMCID: PMC4786922 DOI: 10.1038/mt.2015.236] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 12/22/2015] [Indexed: 12/21/2022] Open
Abstract
Angelman syndrome (AS) is a neurological genetic disorder caused by loss of expression of the maternal copy of UBE3A in the brain. Due to brain-specific genetic imprinting at this locus, the paternal UBE3A is silenced by a long antisense transcript. Inhibition of the antisense transcript could lead to unsilencing of paternal UBE3A, thus providing a therapeutic approach for AS. However, widespread delivery of gene regulators to the brain remains challenging. Here, we report an engineered zinc finger-based artificial transcription factor (ATF) that, when injected i.p. or s.c., crossed the blood-brain barrier and increased Ube3a expression in the brain of an adult mouse model of AS. The factor displayed widespread distribution throughout the brain. Immunohistochemistry of both the hippocampus and cerebellum revealed an increase in Ube3a upon treatment. An ATF containing an alternative DNA-binding domain did not activate Ube3a. We believe this to be the first report of an injectable engineered zinc finger protein that can cause widespread activation of an endogenous gene in the brain. These observations have important implications for the study and treatment of AS and other neurological disorders.
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Affiliation(s)
- Barbara J Bailus
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Benjamin Pyles
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Michelle M McAlister
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Henriette O'Geen
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Sarah H Lockwood
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Alexa N Adams
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Jennifer Trang T Nguyen
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Abigail Yu
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
| | - Robert F Berman
- Department of Neurological Surgery, University of California, Davis, California, USA
| | - David J Segal
- Genome Center, MIND Institute, and Department of Biochemistry and Molecular Medicine, University of California, Davis, California, USA
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41
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Schook LB, Rund L, Begnini KR, Remião MH, Seixas FK, Collares T. Emerging Technologies to Create Inducible and Genetically Defined Porcine Cancer Models. Front Genet 2016; 7:28. [PMID: 26973698 PMCID: PMC4770043 DOI: 10.3389/fgene.2016.00028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 02/13/2016] [Indexed: 12/26/2022] Open
Abstract
There is an emerging need for new animal models that address unmet translational cancer research requirements. Transgenic porcine models provide an exceptional opportunity due to their genetic, anatomic, and physiological similarities with humans. Due to recent advances in the sequencing of domestic animal genomes and the development of new organism cloning technologies, it is now very feasible to utilize pigs as a malleable species, with similar anatomic and physiological features with humans, in which to develop cancer models. In this review, we discuss genetic modification technologies successfully used to produce porcine biomedical models, in particular the Cre-loxP System as well as major advances and perspectives the CRISPR/Cas9 System. Recent advancements in porcine tumor modeling and genome editing will bring porcine models to the forefront of translational cancer research.
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Affiliation(s)
- Lawrence B Schook
- University of Illinois Cancer Center, University of Illinois at ChicagoChicago, IL, USA; Department of Animal Sciences, University of Illinois at Urbana-ChampaignChampaign, IL, USA
| | - Laurie Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign Champaign, IL, USA
| | - Karine R Begnini
- Postgraduate Program in Biotechnology, Biotechnology Unit, Technology Development Center, Federal University of Pelotas Pelotas, Brazil
| | - Mariana H Remião
- Postgraduate Program in Biotechnology, Biotechnology Unit, Technology Development Center, Federal University of Pelotas Pelotas, Brazil
| | - Fabiana K Seixas
- Postgraduate Program in Biotechnology, Biotechnology Unit, Technology Development Center, Federal University of Pelotas Pelotas, Brazil
| | - Tiago Collares
- Postgraduate Program in Biotechnology, Biotechnology Unit, Technology Development Center, Federal University of Pelotas Pelotas, Brazil
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El-Araby AM, Fouad AA, Hanbal AM, Abdelwahab SM, Qassem OM, El-Araby ME. Epigenetic Pathways of Oncogenic Viruses: Therapeutic Promises. Arch Pharm (Weinheim) 2016; 349:73-90. [PMID: 26754591 DOI: 10.1002/ardp.201500375] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 11/30/2015] [Accepted: 12/04/2015] [Indexed: 01/19/2023]
Abstract
Cancerous transformation comprises different events that are both genetic and epigenetic. The ultimate goal for such events is to maintain cell survival and proliferation. This transformation occurs as a consequence of different features such as environmental and genetic factors, as well as some types of infection. Many viral infections are considered to be causative agents of a number of different malignancies. To convert normal cells into cancerous cells, oncogenic viruses must function at the epigenetic level to communicate with their host cells. Oncogenic viruses encode certain epigenetic factors that lead to the immortality and proliferation of infected cells. The epigenetic effectors produced by oncogenic viruses constitute appealing targets to prevent and treat malignant diseases caused by these viruses. In this review, we highlight the importance of epigenetic reprogramming for virus-induced oncogenesis, with special emphasis on viral epigenetic oncoproteins as therapeutic targets. The discovery of molecular components that target epigenetic pathways, especially viral factors, is also discussed.
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Affiliation(s)
- Amr M El-Araby
- Faculty of Pharmacy, Ain Shams University, Abbasia, Cairo, Egypt
| | | | - Amr M Hanbal
- Faculty of Pharmacy, Ain Shams University, Abbasia, Cairo, Egypt
| | | | - Omar M Qassem
- Faculty of Pharmacy, Ain Shams University, Abbasia, Cairo, Egypt
| | - Moustafa E El-Araby
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Alsulaymanya, Jeddah, Saudi Arabia.,Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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43
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Ahmad A. Epigenetics in Personalized Management of Lung Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 890:111-22. [PMID: 26703801 DOI: 10.1007/978-3-319-24932-2_6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In last several years, the focus on the origin and progression of human cancers has shifted from genetic to epigenetic regulation, with particular attention to methylation and acetylation events that have profound effect on the eventual expression of oncogenes and the suppression of tumor suppressors. A few drugs targeting these epigenetic changes have already been approved for treatment, albeit not for lung cancer. With the recent advances in the push towards personalized therapy, questions have been asked about the possible targeting of epigenetic events for personalized lung cancer therapy. Some progress has been made but a lot needs to be done. In this chapter, a succinct review of these topics is provided.
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Affiliation(s)
- Aamir Ahmad
- Karmanos Cancer Institute, Wayne State University, Detroit, MI, 48201, USA.
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44
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Rewriting DNA Methylation Signatures at Will: The Curable Genome Within Reach? ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 945:475-490. [DOI: 10.1007/978-3-319-43624-1_17] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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45
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Zhang H, Nie W, Huang F. The Correlation Relationship between P14ARF Gene DNA Methylation and Primary Liver Cancer. Med Sci Monit 2015; 21:3077-82. [PMID: 26457819 PMCID: PMC4608642 DOI: 10.12659/msm.894395] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background Primary liver cancer is a common malignant tumor that causes serious damage to human health. DNA methylation is common in epigenetics. DNA methylation plays an important role in the process of primary liver cancer occurrence and development. The P14ARF gene is an important tumor suppressor gene. It was found that P14ARF methylation is associated with the degree of malignancy in multiple tumors. Therefore, this study aimed to investigate the relationship between P14ARF methylation level and primary liver cancer malignant degree. Material/Methods Carcinoma tissues and adjacent tissues were collected from 87 primary liver cancer patients. Pyrosequencing was applied to obtain P14ARF methylation. Real-time PCR was used to detect P14ARF mRNA level. Results P14ARF methylation level in cancerous tissue was significantly higher than in the adjacent tissue (t=76.54, P<0.001). P14ARF methylation showed no significant difference in patients with different age, sex, smoking status, or drinking status. It did not present an obvious difference in tumors with different size. Its methylation level increased following the improvement of TNM stage (P<0.05). Compared with the adjacent tissue, P14ARF mRNA in carcinoma tissue decreased by 31% (t=28.91, P<0.001). P14ARF methylation showed a significant negative correlation with mRNA expression in cancerous tissue (r=−0.43, P<0.01). Conclusions P14ARF mRNA level is regulated by DNA methylation in primary liver cancer. P14ARF gene DNA methylation may be associated with the occurrence of primary liver cancer occurrence and TNM staging.
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Affiliation(s)
- Hui Zhang
- Department of General Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
| | - Wanpin Nie
- Department of General Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
| | - Feizhou Huang
- Department of General Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
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46
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Modulation of Estrogen Response Element-Driven Gene Expressions and Cellular Proliferation with Polar Directions by Designer Transcription Regulators. PLoS One 2015; 10:e0136423. [PMID: 26295471 PMCID: PMC4546503 DOI: 10.1371/journal.pone.0136423] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 08/03/2015] [Indexed: 12/27/2022] Open
Abstract
Estrogen receptor α (ERα), as a ligand-dependent transcription factor, mediates 17β-estradiol (E2) effects. ERα is a modular protein containing a DNA binding domain (DBD) and transcription activation domains (AD) located at the amino- and carboxyl-termini. The interaction of the E2-activated ERα dimer with estrogen response elements (EREs) of genes constitutes the initial step in the ERE-dependent signaling pathway necessary for alterations of cellular features. We previously constructed monomeric transcription activators, or monotransactivators, assembled from an engineered ERE-binding module (EBM) using the ERα-DBD and constitutively active ADs from other transcription factors. Monotransactivators modulated cell proliferation by activating and repressing ERE-driven gene expressions that simulate responses observed with E2-ERα. We reasoned here that integration of potent heterologous repression domains (RDs) into EBM could generate monotransrepressors that alter ERE-bearing gene expressions and cellular proliferation in directions opposite to those observed with E2-ERα or monotransactivators. Consistent with this, monotransrepressors suppressed reporter gene expressions that emulate the ERE-dependent signaling pathway. Moreover, a model monotransrepressor regulated DNA synthesis, cell cycle progression and proliferation of recombinant adenovirus infected ER-negative cells through decreasing as well as increasing gene expressions with polar directions compared with E2-ERα or monotransactivator. Our results indicate that an ‘activator’ or a ‘repressor’ possesses both transcription activating/enhancing and repressing/decreasing abilities within a chromatin context. Offering a protein engineering platform to alter signal pathway-specific gene expressions and cell growth, our approach could also be used for the development of tools for epigenetic modifications and for clinical interventions wherein multigenic de-regulations are an issue.
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