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Huang P, Duan W, Ruan C, Wang L, Hosea R, Wu Z, Zeng J, Wu S, Kasim V. NeuroD1-GPX4 signaling leads to ferroptosis resistance in hepatocellular carcinoma. PLoS Genet 2023; 19:e1011098. [PMID: 38134213 PMCID: PMC10773945 DOI: 10.1371/journal.pgen.1011098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 01/08/2024] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Cell death resistance is a hallmark of tumor cells that drives tumorigenesis and drug resistance. Targeting cell death resistance-related genes to sensitize tumor cells and decrease their cell death threshold has attracted attention as a potential antitumor therapeutic strategy. However, the underlying mechanism is not fully understood. Recent studies have reported that NeuroD1, first discovered as a neurodifferentiation factor, is upregulated in various tumor cells and plays a crucial role in tumorigenesis. However, its involvement in tumor cell death resistance remains unknown. Here, we found that NeuroD1 was highly expressed in hepatocellular carcinoma (HCC) cells and was associated with tumor cell death resistance. We revealed that NeuroD1 enhanced HCC cell resistance to ferroptosis, a type of cell death caused by aberrant redox homeostasis that induces lipid peroxide accumulation, leading to increased HCC cell viability. NeuroD1 binds to the promoter of glutathione peroxidase 4 (GPX4), a key reductant that suppresses ferroptosis by reducing lipid peroxide, and activates its transcriptional activity, resulting in decreased lipid peroxide and ferroptosis. Subsequently, we showed that NeuroD1/GPX4-mediated ferroptosis resistance was crucial for HCC cell tumorigenic potential. These findings not only identify NeuroD1 as a regulator of tumor cell ferroptosis resistance but also reveal a novel molecular mechanism underlying the oncogenic function of NeuroD1. Furthermore, our findings suggest the potential of targeting NeuroD1 in antitumor therapy.
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Affiliation(s)
- Ping Huang
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Wei Duan
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Cao Ruan
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Lingxian Wang
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Rendy Hosea
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Zheng Wu
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Jianting Zeng
- Department of Hepatobiliary and Pancreatic Oncology, Chongqing University Cancer Hospital, Chongqing University, Chongqing, China
| | - Shourong Wu
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing University, Chongqing, China
| | - Vivi Kasim
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
- The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
- Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing University Cancer Hospital, Chongqing University, Chongqing, China
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2
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NeuroD1 promotes tumor cell proliferation and tumorigenesis by directly activating the pentose phosphate pathway in colorectal carcinoma. Oncogene 2021; 40:6736-6747. [PMID: 34657129 DOI: 10.1038/s41388-021-02063-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 09/25/2021] [Accepted: 10/04/2021] [Indexed: 11/08/2022]
Abstract
Tumor metabolic reprogramming ensures that cancerous cells obtain sufficient building blocks, energy, and antioxidants to sustain rapid growth and for coping with oxidative stress. Neurogenic differentiation factor 1 (NeuroD1) is upregulated in various types of tumors; however, its involvement in tumor cell metabolic reprogramming remains unclear. In this study, we report that NeuroD1 is positively correlated with glucose-6-phosphate dehydrogenase (G6PD), the rate-limiting enzyme in the pentose phosphate pathway (PPP), in colorectal cancer cells. In addition, the regulation of G6PD by NeuroD1 alters tumor cell metabolism by stimulating the PPP, leading to enhanced production of nucleotides and NADPH. These, in turn, promote DNA and lipid biosynthesis in tumor cells, while decreasing intracellular levels of reactive oxygen species. Mechanistically, we showed that NeuroD1 binds directly to the G6PD promoter to activate G6PD transcription. Consequently, tumor cell proliferation and colony formation are enhanced, leading to increased tumorigenic potential in vitro and in vivo. These findings reveal a novel function of NeuroD1 as a regulator of G6PD, whereby its oncogenic activity is linked to tumor cell metabolic reprogramming and regulation of the PPP. Furthermore, NeuroD1 represents a potential target for metabolism-based anti-tumor therapeutic strategies.
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3
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ASCL1, NKX2-1, and PROX1 co-regulate subtype-specific genes in small-cell lung cancer. iScience 2021; 24:102953. [PMID: 34466783 PMCID: PMC8384902 DOI: 10.1016/j.isci.2021.102953] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/05/2021] [Accepted: 08/02/2021] [Indexed: 12/20/2022] Open
Abstract
Lineage-defining transcription factors (LTFs) play key roles in small-cell lung cancer (SCLC) pathophysiology. Delineating the LTF-regulated genes operative in SCLC could provide a road map to identify SCLC dependencies. We integrated chromatin landscape and transcriptome analyses of patient-derived SCLC preclinical models to identify super-enhancers (SEs) and their associated genes in the ASCL1-, NEUROD1-, and POU2F3-high SCLC subtypes. We find SE signatures predict LTF-based classification of SCLC, and the SE-associated genes are enriched with those defined as common essential genes in DepMap. In addition, in ASCL1-high SCLC, we show ASCL1 complexes with NKX2-1 and PROX1 to co-regulate genes functioning in NOTCH signaling, catecholamine biosynthesis, and cell-cycle processes. Depletion of ASCL1 demonstrates it is a key dependency factor in preclinical SCLC models and directly regulates multiple DepMap-defined essential genes. We provide LTF/SE-based subtype-specific gene sets for SCLC for further therapeutic investigation. Super-enhancers support lineage-defining transcription factor SCLC classification SCLC super-enhancer-associated genes represent essential and lineage-identity genes ASCL1, NKX2-1, and PROX1 proteins interact in a complex in SCLC-A ASCL1, NKX2-1, and PROX1 regulate Notch-signaling, NE-specific, and cell-cycle genes
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4
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López-Carrasco A, Martín-Vañó S, Burgos-Panadero R, Monferrer E, Berbegall AP, Fernández-Blanco B, Navarro S, Noguera R. Impact of extracellular matrix stiffness on genomic heterogeneity in MYCN-amplified neuroblastoma cell line. J Exp Clin Cancer Res 2020; 39:226. [PMID: 33109237 PMCID: PMC7592549 DOI: 10.1186/s13046-020-01729-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/07/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Increased tissue stiffness is a common feature of malignant solid tumors, often associated with metastasis and poor patient outcomes. Vitronectin, as an extracellular matrix anchorage glycoprotein related to a stiff matrix, is present in a particularly increased quantity and specific distribution in high-risk neuroblastoma. Furthermore, as cells can sense and transform the proprieties of the extracellular matrix into chemical signals through mechanotransduction, genotypic changes related to stiffness are possible. METHODS We applied high density SNPa and NGS techniques to in vivo and in vitro models (orthotropic xenograft vitronectin knock-out mice and 3D bioprinted hydrogels with different stiffness) using two representative neuroblastoma cell lines (the MYCN-amplified SK-N-BE(2) and the ALK-mutated SH-SY5Y), to discern how tumor genomics patterns and clonal heterogeneity of the two cell lines are affected. RESULTS We describe a remarkable subclonal selection of genomic aberrations in SK-N-BE(2) cells grown in knock-out vitronectin xenograft mice that also emerged when cultured for long times in stiff hydrogels. In particular, we detected an enlarged subclonal cell population with chromosome 9 aberrations in both models. Similar abnormalities were found in human high-risk neuroblastoma with MYCN amplification. The genomics of the SH-SY5Y cell line remained stable when cultured in both models. CONCLUSIONS Focus on heterogeneous intratumor segmental chromosome aberrations and mutations, as a mirror image of tumor microenvironment, is a vital area of future research.
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Affiliation(s)
- Amparo López-Carrasco
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | - Susana Martín-Vañó
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | - Rebeca Burgos-Panadero
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | - Ezequiel Monferrer
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | - Ana P Berbegall
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | | | - Samuel Navarro
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain
- CIBERONC, Madrid, Spain
| | - Rosa Noguera
- Department of Pathology, Medical School, University of Valencia/INCLIVA, Valencia, Spain.
- CIBERONC, Madrid, Spain.
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5
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Poirier JT, George J, Owonikoko TK, Berns A, Brambilla E, Byers LA, Carbone D, Chen HJ, Christensen CL, Dive C, Farago AF, Govindan R, Hann C, Hellmann MD, Horn L, Johnson JE, Ju YS, Kang S, Krasnow M, Lee J, Lee SH, Lehman J, Lok B, Lovly C, MacPherson D, McFadden D, Minna J, Oser M, Park K, Park KS, Pommier Y, Quaranta V, Ready N, Sage J, Scagliotti G, Sos ML, Sutherland KD, Travis WD, Vakoc CR, Wait SJ, Wistuba I, Wong KK, Zhang H, Daigneault J, Wiens J, Rudin CM, Oliver TG. New Approaches to SCLC Therapy: From the Laboratory to the Clinic. J Thorac Oncol 2020; 15:520-540. [PMID: 32018053 PMCID: PMC7263769 DOI: 10.1016/j.jtho.2020.01.016] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/10/2020] [Accepted: 01/11/2020] [Indexed: 12/12/2022]
Abstract
The outcomes of patients with SCLC have not yet been substantially impacted by the revolution in precision oncology, primarily owing to a paucity of genetic alterations in actionable driver oncogenes. Nevertheless, systemic therapies that include immunotherapy are beginning to show promise in the clinic. Although, these results are encouraging, many patients do not respond to, or rapidly recur after, current regimens, necessitating alternative or complementary therapeutic strategies. In this review, we discuss ongoing investigations into the pathobiology of this recalcitrant cancer and the therapeutic vulnerabilities that are exposed by the disease state. Included within this discussion, is a snapshot of the current biomarker and clinical trial landscapes for SCLC. Finally, we identify key knowledge gaps that should be addressed to advance the field in pursuit of reduced SCLC mortality. This review largely summarizes work presented at the Third Biennial International Association for the Study of Lung Cancer SCLC Meeting.
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Affiliation(s)
- John T Poirier
- Perlmutter Cancer Center, New York University Langone Health, New York, New York
| | - Julie George
- Department of Translational Genomics, Center of Integrated Oncology Cologne-Bonn, Medical Faculty, University of Cologne, Cologne Germany
| | | | - Anton Berns
- The Netherlands Cancer Institute, Amsterdam, Netherlands
| | | | | | | | | | | | - Caroline Dive
- Cancer Research United Kingdom, Manchester Institute, Manchester, United Kingdom
| | - Anna F Farago
- Massachusetts General Hospital, Boston, Massachusetts
| | | | - Christine Hann
- Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Leora Horn
- Vanderbilt University, Nashville, Tennessee
| | | | | | - Sumin Kang
- Emory University, Winship Cancer Institute, Atlanta, Georgia
| | - Mark Krasnow
- Stanford University School of Medicine, Stanford, California
| | - James Lee
- The Ohio State University, Columbus, Ohio
| | - Se-Hoon Lee
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | | | - Benjamin Lok
- Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | | | | | | | - John Minna
- UT Southwestern Medical Center, Dallas, Texas
| | - Matthew Oser
- Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Keunchil Park
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | | | - Yves Pommier
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | | | | | - Julien Sage
- Stanford University School of Medicine, Stanford, California
| | | | - Martin L Sos
- Department of Translational Genomics, Center of Integrated Oncology Cologne-Bonn, Medical Faculty, University of Cologne, Cologne Germany; Molecular Pathology, Institute of Pathology, University Hospital Cologne, Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Kate D Sutherland
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
| | | | | | - Sarah J Wait
- Huntsman Cancer Institute and University of Utah, Salt Lake City, Utah
| | | | - Kwok Kin Wong
- Perlmutter Cancer Center, New York University Langone Health, New York, New York
| | - Hua Zhang
- Perlmutter Cancer Center, New York University Langone Health, New York, New York
| | - Jillian Daigneault
- International Association for the Study of Lung Cancer, Aurora, Colorado
| | - Jacinta Wiens
- International Association for the Study of Lung Cancer, Aurora, Colorado
| | | | - Trudy G Oliver
- Huntsman Cancer Institute and University of Utah, Salt Lake City, Utah.
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6
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Lei K, Li W, Huang C, Li Y, Alfason L, Zhao H, Miyagishi M, Wu S, Kasim V. Neurogenic differentiation factor 1 promotes colorectal cancer cell proliferation and tumorigenesis by suppressing the p53/p21 axis. Cancer Sci 2019; 111:175-185. [PMID: 31715070 PMCID: PMC6942426 DOI: 10.1111/cas.14233] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 02/06/2023] Open
Abstract
Neurogenic differentiation factor 1 (NeuroD1) is a transcription factor critical for promoting neuronal differentiation and maturation. NeuroD1 is involved in neuroblastoma and medulloblastoma; however, its molecular mechanism in promoting tumorigenesis remains unclear. Furthermore, the role of NeuroD1 in non-neural malignancies has not been widely characterized. Here, we found that NeuroD1 is highly expressed in colorectal cancer. NeuroD1-silencing induces the expression of p21, a master regulator of the cell cycle, leading to G2 -M phase arrest and suppression of colorectal cancer cell proliferation as well as colony formation potential. Moreover, NeuroD1-mediated regulation of p21 expression occurs in a p53-dependent manner. Through chromatin immunoprecipitation and point mutation analysis in the predicted NeuroD1 binding site of the p53 promoter, we found that NeuroD1 directly binds to the p53 promoter and suppresses its transcription, resulting in increased p53 expression in NeuroD1-silenced colorectal cancer cells. Finally, xenograft experiments demonstrated that NeuroD1-silencing suppresses colorectal cancer cell tumorigenesis potential by modulating p53 expression. These findings reveal NeuroD1 as a novel regulator of the p53/p21 axis, underscoring its importance in promoting non-neural malignancies. Furthermore, this study provides insight into the transcriptional regulation of p53.
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Affiliation(s)
- Ke Lei
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Wenfang Li
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China.,State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing University, Chongqing, China
| | - Can Huang
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China.,State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing University, Chongqing, China
| | - Yanjun Li
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China.,State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing University, Chongqing, China
| | - Leader Alfason
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China
| | - Hezhao Zhao
- Chongqing University Cancer Hospital, Chongqing, China
| | - Makoto Miyagishi
- Molecular Composite Medicine Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Shourong Wu
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China.,State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing University, Chongqing, China
| | - Vivi Kasim
- The Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China.,The 111 Project Laboratory of Biomechanics and Tissue Repair, College of Bioengineering, Chongqing University, Chongqing, China.,State and Local Joint Engineering Laboratory for Vascular Implants, Chongqing University, Chongqing, China
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7
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Kim DW, Kim KC, Kim KB, Dunn CT, Park KS. Transcriptional deregulation underlying the pathogenesis of small cell lung cancer. Transl Lung Cancer Res 2018. [PMID: 29535909 DOI: 10.21037/tlcr.2017.10.07] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The discovery of recurrent alterations in genes encoding transcription regulators and chromatin modifiers is one of the most important recent developments in the study of the small cell lung cancer (SCLC) genome. With advances in models and analytical methods, the field of SCLC biology has seen remarkable progress in understanding the deregulated transcription networks linked to the tumor development and malignant progression. This review will discuss recent discoveries on the roles of RB and P53 family of tumor suppressors and MYC family of oncogenes in tumor initiation and development. It will also describe the roles of lineage-specific factors in neuroendocrine (NE) cell differentiation and homeostasis and the roles of epigenetic alterations driven by changes in NFIB and chromatin modifiers in malignant progression and chemoresistance. These recent findings have led to a model of transcriptional network in which multiple pathways converge on regulatory regions of crucial genes linked to tumor development. Validation of this model and characterization of target genes will provide critical insights into the biology of SCLC and novel strategies for tumor intervention.
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Affiliation(s)
- Dong-Wook Kim
- Department of Microbiology, Immunology, and Cancer Biology, The University of Virginia Cancer Center, University of Virginia, Charlottesville, VA, USA
| | - Keun-Cheol Kim
- Department of Microbiology, Immunology, and Cancer Biology, The University of Virginia Cancer Center, University of Virginia, Charlottesville, VA, USA.,Department of Biological Sciences, Kangwon National University, Chuncheon, Korea
| | - Kee-Beom Kim
- Department of Microbiology, Immunology, and Cancer Biology, The University of Virginia Cancer Center, University of Virginia, Charlottesville, VA, USA
| | - Colin T Dunn
- Department of Microbiology, Immunology, and Cancer Biology, The University of Virginia Cancer Center, University of Virginia, Charlottesville, VA, USA
| | - Kwon-Sik Park
- Department of Microbiology, Immunology, and Cancer Biology, The University of Virginia Cancer Center, University of Virginia, Charlottesville, VA, USA
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8
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Theisen U, Hennig C, Ring T, Schnabel R, Köster RW. Neurotransmitter-mediated activity spatially controls neuronal migration in the zebrafish cerebellum. PLoS Biol 2018; 16:e2002226. [PMID: 29300740 PMCID: PMC5754045 DOI: 10.1371/journal.pbio.2002226] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 11/22/2017] [Indexed: 11/27/2022] Open
Abstract
Neuronal migration during embryonic development contributes to functional brain circuitry. Many neurons migrate in morphologically distinct stages that coincide with differentiation, requiring tight spatial regulation. It had been proposed that neurotransmitter-mediated activity could exert this control. Here, we demonstrate that intracellular calcium transients occur in cerebellar neurons of zebrafish embryos during migration. We show that depolarization increases and hyperpolarization reduces the speed of tegmental hindbrain neurons using optogenetic tools and advanced track analysis optimized for in vivo migration. Finally, we introduce a compound screening assay to identify acetylcholine (ACh), glutamate, and glycine as regulators of migration, which act regionally along the neurons’ route. We summarize our findings in a model describing how different neurotransmitters spatially interact to control neuronal migration. The high evolutionary conservation of the cerebellum and hindbrain makes it likely that polarization state-driven motility constitutes an important principle in building a functional brain. Postmitotic neurons migrate from their site of origin to their final destination in the developing brain to form functional structures. These neurons typically follow defined routes through the tissue. Previous studies investigating progress along such route have identified neurotransmitters—chemicals that transmit the signals between neurons—as important regulators in neuronal migration using mostly rodent brain slice cultures and cultivated neurons. In this study, we use live zebrafish embryos to test the influence of neurotransmitters on migrating hindbrain neurons. First, we demonstrate that calcium transients can be measured in these neurons using genetically encoded reporters. Next, we use optogenetic channels to specifically de- or hyperpolarize the plasma membrane of the neurons to show that the polarization state is linked to migratory speed. Finally, we use a screening method to identify the neurotransmitter systems involved in migration progress control. We summarize these findings in a model that suggests that there are regions of influence for different neurotransmitters that act successively on the neurons to ensure their timely arrival at their destination.
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Affiliation(s)
- Ulrike Theisen
- Technische Universität Braunschweig, Zoological Institute, Cellular and Molecular Neurobiology, Braunschweig, Germany
| | - Christian Hennig
- Technische Universität Braunschweig, Institute for Genetics, Braunschweig, Germany
| | - Tobias Ring
- Technische Universität Braunschweig, Institute for Engineering Design, Vibroacoustics, Braunschweig, Germany
| | - Ralf Schnabel
- Technische Universität Braunschweig, Institute for Genetics, Braunschweig, Germany
| | - Reinhard W. Köster
- Technische Universität Braunschweig, Zoological Institute, Cellular and Molecular Neurobiology, Braunschweig, Germany
- * E-mail:
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9
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Pataskar A, Jung J, Smialowski P, Noack F, Calegari F, Straub T, Tiwari VK. NeuroD1 reprograms chromatin and transcription factor landscapes to induce the neuronal program. EMBO J 2015; 35:24-45. [PMID: 26516211 DOI: 10.15252/embj.201591206] [Citation(s) in RCA: 170] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 09/14/2015] [Indexed: 12/30/2022] Open
Abstract
Cell fate specification relies on the action of critical transcription factors that become available at distinct stages of embryonic development. One such factor is NeuroD1, which is essential for eliciting the neuronal development program and possesses the ability to reprogram other cell types into neurons. Given this capacity, it is important to understand its targets and the mechanism underlying neuronal specification. Here, we show that NeuroD1 directly binds regulatory elements of neuronal genes that are developmentally silenced by epigenetic mechanisms. This targeting is sufficient to initiate events that confer transcriptional competence, including reprogramming of transcription factor landscape, conversion of heterochromatin to euchromatin, and increased chromatin accessibility, indicating potential pioneer factor ability of NeuroD1. The transcriptional induction of neuronal fate genes is maintained via epigenetic memory despite a transient NeuroD1 induction during neurogenesis. NeuroD1 also induces genes involved in the epithelial-to-mesenchymal transition, thereby promoting neuronal migration. Our study not only reveals the NeuroD1-dependent gene regulatory program driving neurogenesis but also increases our understanding of how cell fate specification during development involves a concerted action of transcription factors and epigenetic mechanisms.
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Affiliation(s)
| | - Johannes Jung
- Institute of Molecular Biology (IMB), Mainz, Germany
| | - Pawel Smialowski
- Adolf Butenandt Institute and Center for Integrated Protein Science, Ludwig Maximilian University, Munich, Germany
| | - Florian Noack
- DFG-Research Center for Regenerative Therapies, Cluster of Excellence, TU-Dresden, Dresden, Germany
| | - Federico Calegari
- DFG-Research Center for Regenerative Therapies, Cluster of Excellence, TU-Dresden, Dresden, Germany
| | - Tobias Straub
- Adolf Butenandt Institute and Center for Integrated Protein Science, Ludwig Maximilian University, Munich, Germany
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10
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Brown AN, Vied C, Dennis JH, Bhide PG. Nucleosome Repositioning: A Novel Mechanism for Nicotine- and Cocaine-Induced Epigenetic Changes. PLoS One 2015; 10:e0139103. [PMID: 26414157 PMCID: PMC4586372 DOI: 10.1371/journal.pone.0139103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 09/09/2015] [Indexed: 11/19/2022] Open
Abstract
Drugs of abuse modify behavior by altering gene expression in the brain. Gene expression can be regulated by changes in DNA methylation as well as by histone modifications, which alter chromatin structure, DNA compaction and DNA accessibility. In order to better understand the molecular mechanisms directing drug-induced changes in chromatin structure, we examined DNA-nucleosome interactions within promoter regions of 858 genes in human neuroblastoma cells (SH-SY5Y) exposed to nicotine or cocaine. Widespread, drug- and time-resolved repositioning of nucleosomes was identified at the transcription start site and promoter region of multiple genes. Nicotine and cocaine produced unique and shared changes in terms of the numbers and types of genes affected, as well as repositioning of nucleosomes at sites which could increase or decrease the probability of gene expression based on DNA accessibility. Half of the drug-induced nucleosome positions approximated a theoretical model of nucleosome occupancy based on physical and chemical characteristics of the DNA sequence, whereas the basal or drug naïve positions were generally DNA sequence independent. Thus we suggest that nucleosome repositioning represents an initial dynamic genome-wide alteration of the transcriptional landscape preceding more selective downstream transcriptional reprogramming, which ultimately characterizes the cell- and tissue-specific responses to drugs of abuse.
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Affiliation(s)
- Amber N. Brown
- Center for Brain Repair, Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, United States of America
| | - Cynthia Vied
- Center for Brain Repair, Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, United States of America
| | - Jonathan H. Dennis
- Department of Biological Sciences, Florida State University, Tallahassee, Florida, United States of America
| | - Pradeep G. Bhide
- Center for Brain Repair, Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, United States of America
- * E-mail:
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Youn H, Son B, Kim W, Jun SY, Lee JS, Lee J, Kang C, Kim J, Youn B. Dissociation of MIF‐rpS3 Complex and Sequential NF‐κB Activation Is Involved in IR‐Induced Metastatic Conversion of NSCLC. J Cell Biochem 2015; 116:2504-16. [DOI: 10.1002/jcb.25195] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 04/14/2015] [Indexed: 12/25/2022]
Affiliation(s)
- HyeSook Youn
- Department of Biological SciencesPusan National UniversityBusan609‐735Republic of Korea
- Nuclear Science Research InstitutePusan National UniversityBusan609‐735Republic of Korea
| | - Beomseok Son
- Department of Integrated Biological SciencePusan National UniversityBusan609‐735Republic of Korea
| | - Wanyeon Kim
- Department of Biological SciencesPusan National UniversityBusan609‐735Republic of Korea
- Nuclear Science Research InstitutePusan National UniversityBusan609‐735Republic of Korea
| | - Se Young Jun
- Department of ChemistryWashington State UniversityPullmanWA 99164USA
| | - Jung Sub Lee
- Department of Orthopaedic SurgeryMedical Research InstitutePusan National University School of MedicineBusan602‐739Republic of Korea
| | - Jae‐Myung Lee
- Department of Naval Architecture and Ocean EngineeringPusan National UniversityBusan609‐735Republic of Korea
| | - ChulHee Kang
- Department of ChemistryWashington State UniversityPullmanWA 99164USA
| | - Joon Kim
- Laboratory of BiochemistrySchool of Life Sciences & BiotechnologyKorea UniversitySeoul136‐701Republic of Korea
| | - BuHyun Youn
- Department of Biological SciencesPusan National UniversityBusan609‐735Republic of Korea
- Nuclear Science Research InstitutePusan National UniversityBusan609‐735Republic of Korea
- Department of Integrated Biological SciencePusan National UniversityBusan609‐735Republic of Korea
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