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Hussain S, Sadouni N, van Essen D, Dao LTM, Ferré Q, Charbonnier G, Torres M, Gallardo F, Lecellier CH, Sexton T, Saccani S, Spicuglia S. Short tandem repeats are important contributors to silencer elements in T cells. Nucleic Acids Res 2023; 51:4845-4866. [PMID: 36929452 PMCID: PMC10250210 DOI: 10.1093/nar/gkad187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 02/26/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023] Open
Abstract
The action of cis-regulatory elements with either activation or repression functions underpins the precise regulation of gene expression during normal development and cell differentiation. Gene activation by the combined activities of promoters and distal enhancers has been extensively studied in normal and pathological contexts. In sharp contrast, gene repression by cis-acting silencers, defined as genetic elements that negatively regulate gene transcription in a position-independent fashion, is less well understood. Here, we repurpose the STARR-seq approach as a novel high-throughput reporter strategy to quantitatively assess silencer activity in mammals. We assessed silencer activity from DNase hypersensitive I sites in a mouse T cell line. Identified silencers were associated with either repressive or active chromatin marks and enriched for binding motifs of known transcriptional repressors. CRISPR-mediated genomic deletions validated the repressive function of distinct silencers involved in the repression of non-T cell genes and genes regulated during T cell differentiation. Finally, we unravel an association of silencer activity with short tandem repeats, highlighting the role of repetitive elements in silencer activity. Our results provide a general strategy for genome-wide identification and characterization of silencer elements.
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Affiliation(s)
- Saadat Hussain
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Nori Sadouni
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Dominic van Essen
- Institute for Research on Cancer and Ageing, IRCAN, 06107 Nice, France
| | - Lan T M Dao
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Quentin Ferré
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Guillaume Charbonnier
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Magali Torres
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Frederic Gallardo
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Charles-Henri Lecellier
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, Montpellier, France
- LIRMM, University of Montpellier, CNRS, Montpellier, France
| | - Tom Sexton
- Institut de Génétique et de Biologie Moléculaire et Cellulaire – IGBMC (CNRS UMR 7104, INSERM U1258, Université de Strasbourg), 67404 Illkirch, France
| | - Simona Saccani
- Institute for Research on Cancer and Ageing, IRCAN, 06107 Nice, France
| | - Salvatore Spicuglia
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
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2
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Le DH, Nguyen QH, Dao LTM. Editorial: Computational and Experimental Approaches in Exploring the Role of Genetics and Genomics in Multifactorial Diseases. Front Genet 2022; 13:873069. [PMID: 35368677 PMCID: PMC8965092 DOI: 10.3389/fgene.2022.873069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Duc-Hau Le
- School of Computer Science and Engineering, Thuyloi University, Hanoi, Vietnam
- *Correspondence: Duc-Hau Le,
| | - Quang-Huy Nguyen
- School of Computer Science and Engineering, Thuyloi University, Hanoi, Vietnam
| | - Lan T. M. Dao
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
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3
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Santiago-Algarra D, Souaid C, Singh H, Dao LTM, Hussain S, Medina-Rivera A, Ramirez-Navarro L, Castro-Mondragon JA, Sadouni N, Charbonnier G, Spicuglia S. Epromoters function as a hub to recruit key transcription factors required for the inflammatory response. Nat Commun 2021; 12:6660. [PMID: 34795220 PMCID: PMC8602369 DOI: 10.1038/s41467-021-26861-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 10/14/2021] [Indexed: 12/14/2022] Open
Abstract
Gene expression is controlled by the involvement of gene-proximal (promoters) and distal (enhancers) regulatory elements. Our previous results demonstrated that a subset of gene promoters, termed Epromoters, work as bona fide enhancers and regulate distal gene expression. Here, we hypothesized that Epromoters play a key role in the coordination of rapid gene induction during the inflammatory response. Using a high-throughput reporter assay we explored the function of Epromoters in response to type I interferon. We find that clusters of IFNa-induced genes are frequently associated with Epromoters and that these regulatory elements preferentially recruit the STAT1/2 and IRF transcription factors and distally regulate the activation of interferon-response genes. Consistently, we identified and validated the involvement of Epromoter-containing clusters in the regulation of LPS-stimulated macrophages. Our findings suggest that Epromoters function as a local hub recruiting the key TFs required for coordinated regulation of gene clusters during the inflammatory response.
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Affiliation(s)
- David Santiago-Algarra
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Charbel Souaid
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Himanshu Singh
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Lan T M Dao
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
- Vinmec Research Institute of Stem cell and Gene technology, Vinmec Healthcare System, Hanoi, Vietnam
| | - Saadat Hussain
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Alejandra Medina-Rivera
- Laboratorio Internacional de Investigación sobre el Genoma Humano, Universidad Nacional Autónoma de México, Juriquilla, Mexico
| | - Lucia Ramirez-Navarro
- Laboratorio Internacional de Investigación sobre el Genoma Humano, Universidad Nacional Autónoma de México, Juriquilla, Mexico
| | - Jaime A Castro-Mondragon
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership, University of Oslo, 0318, Oslo, Norway
| | - Nori Sadouni
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Guillaume Charbonnier
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France
- Equipe Labellisée Ligue Contre le Cancer, Paris, France
| | - Salvatore Spicuglia
- Aix-Marseille University, INSERM, TAGC, UMR 1090, Marseille, France.
- Equipe Labellisée Ligue Contre le Cancer, Paris, France.
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4
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Hoang DM, Nguyen KT, Hoang VT, Dao LTM, Bui HT, Ho TTK, Nguyen TTP, Ngo ATL, Nguyen HK, Nguyen LT. Clinical study of mesenchymal stem/stromal cell therapy for the treatment of frailty: a proposed experimental design for therapeutic and mechanistic investigation. J Gerontol A Biol Sci Med Sci 2021; 77:1287-1291. [PMID: 34718548 PMCID: PMC9255690 DOI: 10.1093/gerona/glab326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Indexed: 11/14/2022] Open
Abstract
Frailty, a specific condition of increased vulnerability and reduced general health associated with aging in older people, is an emerging problem worldwide with major implications for clinical practice and public health. Recent preclinical and clinical studies have supported the safety of mesenchymal stem/stromal cells (MSCs) in the treatment of frailty. Comprehensive study is needed to assess the interrelationship between the condition of frailty and the effects of MSC-based therapy. This randomized controlled phase I/II trial aims to investigate the safety and potential therapeutic efficacy of the allogeneic administration of umbilical cord-derived MSCs (UC-MSCs) in combination with the standard treatment for frailty in Vietnam. Moreover, this study describes the rationales, study designs, methodologies and analytical strategies currently employed in stem cell research and clinical studies. The primary outcome measures will include the incidences of prespecified administration-associated adverse events (AEs) and serious adverse events (SAEs). The potential efficacy will be evaluated based on improvements in frailty conditions (including those determined through a physical examination, patient-reported outcomes, quality of life, immune markers of frailty, metabolism analysis, and cytokine markers from patient plasma). This clinical trial and stem cell analysis associated with patient sampling at different timepoints aim to identify and characterize the potential effects of UC-MSCs on improving frailty based on the stem cell quality, cytokine/growth factor secretion profiles of UC-MSCs, cellular senescence, and metabolic analysis of patient CD3+ cells providing fundamental knowledge for designing and implementing research strategies in future studies.
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Affiliation(s)
- Duc M Hoang
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Kien T Nguyen
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Van T Hoang
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Lan T M Dao
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Hang T Bui
- Center of Regenerative Medicine and Cell Therapy, Vinmec Times City International Hospital, Hanoi, Vietnam
| | | | | | - Anh T L Ngo
- Cell Therapy Department, Vinmec High-tech Center, Vinmec Healthcare System, Hanoi, Vietnam
| | - Hoa K Nguyen
- Institute of Biomedical Engineering University of Toronto. Room 415, Rosebrugh Building, 164 College Street, Toronto, ON, M5S 3E2, Canada
| | - Liem Thanh Nguyen
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
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5
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Maqbool MA, Pioger L, El Aabidine AZ, Karasu N, Molitor AM, Dao LTM, Charbonnier G, van Laethem F, Fenouil R, Koch F, Lacaud G, Gut I, Gut M, Amigorena S, Joffre O, Sexton T, Spicuglia S, Andrau JC. Alternative Enhancer Usage and Targeted Polycomb Marking Hallmark Promoter Choice during T Cell Differentiation. Cell Rep 2020; 32:108048. [PMID: 32814051 DOI: 10.1016/j.celrep.2020.108048] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/13/2020] [Accepted: 07/28/2020] [Indexed: 01/08/2023] Open
Abstract
During thymic development and upon peripheral activation, T cells undergo extensive phenotypic and functional changes coordinated by lineage-specific developmental programs. To characterize the regulatory landscape controlling T cell identity, we perform a wide epigenomic and transcriptional analysis of mouse thymocytes and naive CD4 differentiated T helper cells. Our investigations reveal a dynamic putative enhancer landscape, and we could validate many of the enhancers using the high-throughput CapStarr sequencing (CapStarr-seq) approach. We find that genes using multiple promoters display increased enhancer usage, suggesting that apparent "enhancer redundancy" might relate to isoform selection. Furthermore, we can show that two Runx3 promoters display long-range interactions with specific enhancers. Finally, our analyses suggest a novel function for the PRC2 complex in the control of alternative promoter usage. Altogether, our study has allowed for the mapping of an exhaustive set of active enhancers and provides new insights into their function and that of PRC2 in controlling promoter choice during T cell differentiation.
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Affiliation(s)
- Muhammad Ahmad Maqbool
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France.
| | - Léo Pioger
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France
| | - Amal Zine El Aabidine
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France
| | - Nezih Karasu
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), 1 rue Laurent Fries, 67404 Illkirch, France; CNRS UMR7104, 1 rue Laurent Fries, 67404 Illkirch, France; INSERM U1258, 1 rue Laurent Fries, 67404 Illkirch, France; University of Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France
| | - Anne Marie Molitor
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), 1 rue Laurent Fries, 67404 Illkirch, France; CNRS UMR7104, 1 rue Laurent Fries, 67404 Illkirch, France; INSERM U1258, 1 rue Laurent Fries, 67404 Illkirch, France; University of Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France
| | - Lan T M Dao
- Aix-Marseille University, UMR-S 1090, TAGC, Marseille 13009, France
| | | | - Francois van Laethem
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France
| | - Romain Fenouil
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France
| | - Frederic Koch
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France
| | - Georges Lacaud
- CRUK Stem Cell Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Aderley Park, Macclesfield SK104TG, UK
| | - Ivo Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 4, 08028 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Marta Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 4, 08028 Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Sebastian Amigorena
- Institut Curie, Université Paris Sciences et Lettres, INSERM U932, 75005 Paris, France
| | - Olivier Joffre
- Centre de Physiopathologie de Toulouse Purpan, INSERM UMR1043 CHU Purpan - BP 3028, 31024 Toulouse Cedex 3, France
| | - Thomas Sexton
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), 1 rue Laurent Fries, 67404 Illkirch, France; CNRS UMR7104, 1 rue Laurent Fries, 67404 Illkirch, France; INSERM U1258, 1 rue Laurent Fries, 67404 Illkirch, France; University of Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France
| | | | - Jean-Christophe Andrau
- Institut de Génétique Moléculaire de Montpellier, Université de Montpellier, CNRS, 1919 Route de Mende, Montpellier 34293, France.
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6
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Alomairi J, Molitor AM, Sadouni N, Hussain S, Torres M, Saadi W, Dao LTM, Charbonnier G, Santiago-Algarra D, Andrau JC, Puthier D, Sexton T, Spicuglia S. Integration of high-throughput reporter assays identify a critical enhancer of the Ikzf1 gene. PLoS One 2020; 15:e0233191. [PMID: 32453736 PMCID: PMC7250416 DOI: 10.1371/journal.pone.0233191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 04/29/2020] [Indexed: 01/08/2023] Open
Abstract
The Ikzf1 locus encodes the lymphoid specific transcription factor Ikaros, which plays an essential role in both T and B cell differentiation, while deregulation or mutation of IKZF1/Ikzf1 is involved in leukemia. Tissue-specific and cell identity genes are usually associated with clusters of enhancers, also called super-enhancers, which are believed to ensure proper regulation of gene expression throughout cell development and differentiation. Several potential regulatory regions have been identified in close proximity of Ikzf1, however, the full extent of the regulatory landscape of the Ikzf1 locus is not yet established. In this study, we combined epigenomics and transcription factor binding along with high-throughput enhancer assay and 4C-seq to prioritize an enhancer element located 120 kb upstream of the Ikzf1 gene. We found that deletion of the E120 enhancer resulted in a significant reduction of Ikzf1 mRNA. However, the epigenetic landscape and 3D topology of the locus were only slightly affected, highlighting the complexity of the regulatory landscape regulating the Ikzf1 locus.
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Affiliation(s)
- Jaafar Alomairi
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Anne M. Molitor
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France
- CNRS UMR7104, Illkirch, France
- INSERM U1258, Illkirch, France
- University of Strasbourg, Illkirch, France
| | - Nori Sadouni
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Saadat Hussain
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Magali Torres
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Wiam Saadi
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Lan T. M. Dao
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Guillaume Charbonnier
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - David Santiago-Algarra
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Jean Christophe Andrau
- Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, Montpellier, France
| | - Denis Puthier
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Tom Sexton
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France
- CNRS UMR7104, Illkirch, France
- INSERM U1258, Illkirch, France
- University of Strasbourg, Illkirch, France
| | - Salvatore Spicuglia
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
- Equipe Labélisée Ligue Contre le Cancer, Marseille, France
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7
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Le VS, Tran KT, Bui HTP, Le HTT, Nguyen CD, Do DH, Ly HTT, Pham LTD, Dao LTM, Nguyen LT. A Vietnamese human genetic variation database. Hum Mutat 2019; 40:1664-1675. [PMID: 31180159 DOI: 10.1002/humu.23835] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 05/14/2019] [Accepted: 06/05/2019] [Indexed: 12/29/2022]
Abstract
Large scale human genome projects have created tremendous human genome databases for some well-studied populations. Vietnam has about 95 million people (the 14th largest country by population in the world) of which more than 86% are Kinh people. To date, genetic studies for Vietnamese people mostly rely on genetic information from other populations. Building a Vietnamese human genetic variation database is a must for properly interpreting Vietnamese genetic variants. To this end, we sequenced 105 whole genomes and 200 whole exomes of 305 unrelated Kinh Vietnamese (KHV) people. We also included 101 other previously published KHV genomes to build a Vietnamese human genetic variation database of 406 KHV people. The KHV database contains 24.81 million variants (22.47 million single nucleotide polymorphisms (SNPs) and 2.34 million indels) of which 0.71 million variants are novel. It includes more than 99.3% of variants with a frequency of >1% in the KHV population. Noticeably, the KHV database revealed 107 variants reported in the human genome mutation database as pathological mutations with a frequency above 1% in the KHV population. The KHV database (available at https://genomes.vn) would be beneficial for genetic studies and medical applications not only for the Vietnamese population but also for other closely related populations.
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Affiliation(s)
- Vinh S Le
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam.,Department of Gene Technology, Vinmec International Hospital Times City, Hanoi, Vietnam.,Faculty of Information Technology, University of Engineering and Technology, Vietnam National University Hanoi, Hanoi, Vietnam
| | - Kien T Tran
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Hoa T P Bui
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam.,Department of Gene Technology, Vinmec International Hospital Times City, Hanoi, Vietnam.,School of Environment and Life Science, University of Salford, Manchester, United Kingdom
| | - Huong T T Le
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam.,Department of Gene Technology, Vinmec International Hospital Times City, Hanoi, Vietnam
| | - Canh D Nguyen
- Faculty of Information Technology, University of Engineering and Technology, Vietnam National University Hanoi, Hanoi, Vietnam
| | - Duong H Do
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam.,Department of Gene Technology, Vinmec International Hospital Times City, Hanoi, Vietnam
| | - Ha T T Ly
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam.,Department of Gene Technology, Vinmec International Hospital Times City, Hanoi, Vietnam
| | - Linh T D Pham
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Lan T M Dao
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
| | - Liem T Nguyen
- Vinmec Research Institute of Stem Cell and Gene Technology, Hanoi, Vietnam
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8
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Saadi W, Kermezli Y, Dao LTM, Mathieu E, Santiago-Algarra D, Manosalva I, Torres M, Belhocine M, Pradel L, Loriod B, Aribi M, Puthier D, Spicuglia S. A critical regulator of Bcl2 revealed by systematic transcript discovery of lncRNAs associated with T-cell differentiation. Sci Rep 2019; 9:4707. [PMID: 30886319 PMCID: PMC6423290 DOI: 10.1038/s41598-019-41247-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 03/01/2019] [Indexed: 12/30/2022] Open
Abstract
Normal T-cell differentiation requires a complex regulatory network which supports a series of maturation steps, including lineage commitment, T-cell receptor (TCR) gene rearrangement, and thymic positive and negative selection. However, the underlying molecular mechanisms are difficult to assess due to limited T-cell models. Here we explore the use of the pro-T-cell line P5424 to study early T-cell differentiation. Stimulation of P5424 cells by the calcium ionophore ionomycin together with PMA resulted in gene regulation of T-cell differentiation and activation markers, partially mimicking the CD4-CD8- double negative (DN) to double positive (DP) transition and some aspects of subsequent T-cell maturation and activation. Global analysis of gene expression, along with kinetic experiments, revealed a significant association between the dynamic expression of coding genes and neighbor lncRNAs including many newly-discovered transcripts, thus suggesting potential co-regulation. CRISPR/Cas9-mediated genetic deletion of Robnr, an inducible lncRNA located downstream of the anti-apoptotic gene Bcl2, demonstrated a critical role of the Robnr locus in the induction of Bcl2. Thus, the pro-T-cell line P5424 is a powerful model system to characterize regulatory networks involved in early T-cell differentiation and maturation.
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Affiliation(s)
- Wiam Saadi
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.,Laboratory of Applied Molecular Biology and Immunology, W0414100, University of Tlemcen, Tlemcen, Algeria
| | - Yasmina Kermezli
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.,Laboratory of Applied Molecular Biology and Immunology, W0414100, University of Tlemcen, Tlemcen, Algeria
| | - Lan T M Dao
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.,Vinmec Research Institute of Stem cell and Gene technology (VRISG), Hanoi, Vietnam
| | - Evelyne Mathieu
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - David Santiago-Algarra
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Iris Manosalva
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Magali Torres
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Mohamed Belhocine
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.,Molecular Biology and Genetics Laboratory, Dubai, United Arab Emirates
| | - Lydie Pradel
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France.,Equipe Labélisée Ligue Contre le Cancer, Marseille, France
| | - Beatrice Loriod
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France
| | - Mourad Aribi
- Laboratory of Applied Molecular Biology and Immunology, W0414100, University of Tlemcen, Tlemcen, Algeria
| | - Denis Puthier
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France. .,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.
| | - Salvatore Spicuglia
- Aix-Marseille University, Inserm, TAGC, UMR1090, Marseille, France. .,Equipe Labélisée Ligue Contre le Cancer, Marseille, France.
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9
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Abstract
Promoters with enhancer activity have been described recently. In this point of view, we will discuss current findings highlighting the commonality of this type of regulatory elements, their genetic and epigenetic characteristics, their potential biological roles in the regulation of gene expression and the underlining molecular mechanisms. ABBREVIATIONS TSS: transcription start site; IFN: interferon; STARR-seq: Self-Transcribing Active Regulatory Region sequencing; MPRA: Massively Parallel Reporter Assay; ChIP: chromatin immunoprecipitation; CRISPR: Clustered Regularly Interspaced Short Palindromic Repeats; lncRNA: long non-coding RNA.
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Affiliation(s)
- Lan T. M. Dao
- Vinmec Research Institute of Stem cell and Gene technology (VRISG), Hanoi, Vietnam
| | - Salvatore Spicuglia
- Aix-Marseille University, INSERM, TAGC, UMR, Marseille, France
- Equipe Labéllisée Ligue Contre le Cancer
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10
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Le DH, Dao LTM. Annotating Diseases Using Human Phenotype Ontology Improves Prediction of Disease-Associated Long Non-coding RNAs. J Mol Biol 2018; 430:2219-2230. [PMID: 29758261 DOI: 10.1016/j.jmb.2018.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 04/28/2018] [Accepted: 05/05/2018] [Indexed: 01/13/2023]
Abstract
Recently, many long non-coding RNAs (lncRNAs) have been identified and their biological function has been characterized; however, our understanding of their underlying molecular mechanisms related to disease is still limited. To overcome the limitation in experimentally identifying disease-lncRNA associations, computational methods have been proposed as a powerful tool to predict such associations. These methods are usually based on the similarities between diseases or lncRNAs since it was reported that similar diseases are associated with functionally similar lncRNAs. Therefore, prediction performance is highly dependent on how well the similarities can be captured. Previous studies have calculated the similarity between two diseases by mapping exactly each disease to a single Disease Ontology (DO) term, and then use a semantic similarity measure to calculate the similarity between them. However, the problem of this approach is that a disease can be described by more than one DO terms. Until now, there is no annotation database of DO terms for diseases except for genes. In contrast, Human Phenotype Ontology (HPO) is designed to fully annotate human disease phenotypes. Therefore, in this study, we constructed disease similarity networks/matrices using HPO instead of DO. Then, we used these networks/matrices as inputs of two representative machine learning-based and network-based ranking algorithms, that is, regularized least square and heterogeneous graph-based inference, respectively. The results showed that the prediction performance of the two algorithms on HPO-based is better than that on DO-based networks/matrices. In addition, our method can predict 11 novel cancer-associated lncRNAs, which are supported by literature evidence.
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Affiliation(s)
- Duc-Hau Le
- School of Computer Science and Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam; Vinmec Research Institute of Stem Cell and Gene Technology, 458 Minh Khai, Hai Ba Trung, Hanoi, Vietnam.
| | - Lan T M Dao
- Vinmec Research Institute of Stem Cell and Gene Technology, 458 Minh Khai, Hai Ba Trung, Hanoi, Vietnam
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11
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Abstract
The regulation of gene transcription in higher eukaryotes is accomplished through the involvement of transcription start site (TSS)-proximal (promoters) and -distal (enhancers) regulatory elements. It is now well acknowledged that enhancer elements play an essential role during development and cell differentiation, while genetic alterations in these elements are a major cause of human disease. Many strategies have been developed to identify and characterize enhancers. Here, we discuss recent advances in high-throughput approaches to assess enhancer activity, from the well-established massively parallel reporter assays to the recent clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9-based technologies. We highlight how these approaches contribute toward a better understanding of enhancer function, eventually leading to the discovery of new types of regulatory sequences, and how the alteration of enhancers can affect transcriptional regulation.
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Affiliation(s)
| | - Lan T M Dao
- Aix-Marseille University, TAGC, Marseille, France
| | - Lydie Pradel
- Aix-Marseille University, TAGC, Marseille, France
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12
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Dao LTM, Park EY, Lim SM, Choi YS, Jung HS, Jun HS. Transplantation of insulin-producing cells differentiated from human periosteum-derived progenitor cells ameliorate hyperglycemia in diabetic mice. Transplantation 2015; 98:1040-7. [PMID: 25208321 DOI: 10.1097/tp.0000000000000388] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Periosteum-derived progenitor cells (PDPCs) isolated from the adult periosteum can differentiate into several specific cell types. In this study, we examined the characteristics of human PDPCs and insulin-producing cells (IPCs) differentiated from PDPCs and their ability to ameliorate hyperglycemia when transplanted into streptozotocin-induced nonobese diabetic-severe combined immunodeficiency diabetic mice. METHODS Periosteum-derived progenitor cells were isolated from patients, expanded in culture, and subjected to a three-step differentiation protocol to produce IPCs. The expression of immunogenic, pluripotent, and pancreatic markers was examined, and glucose-stimulated insulin release in vitro was also assessed. Insulin-producing cells that differentiated from PDPCs were transplanted under the kidney capsule of streptozotocin-induced diabetic mice, and glucose levels and glucose tolerance were measured. RESULTS We found that PDPCs expressed the mesenchymal stem cell markers CD73, CD90, and CD105 and the pluripotent markers, octamer-binding transcription factor 4 and Nanog, but not sex-determining region Y-box 2 or Rex1. Periosteum-derived progenitor cells expressed human leukocyte antigen-ABC but did not express human leukocyte antigen-DR or the costimulatory molecules CD80 and CD86. Differentiated IPCs expressed pancreatic hormones (insulin, glucagon, somatostatin, and glucose transporter 2), hormone processing, and secretion molecules (prohormone convertase-1 and convertase-2, Kir6.2), and pancreatic transcription factors (neurogenin 3, pancreatic and duodenal homeobox 1, sex-determining region Y-box 17). When IPCs were stimulated with glucose in vitro, insulin secretion was elevated. Transplantation of IPCs under the kidney capsules of diabetic mice improved hyperglycemia and glucose tolerance. Human insulin was detected in the serum and kidney sections of mice transplanted with IPCs differentiated from PDPCs. CONCLUSION These results suggest that IPCs differentiated from PDPCs might be an alternative source of β cells for treating diabetes.
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Affiliation(s)
- Lan T M Dao
- 1 College of Pharmacy and Gachon Institute of Pharmaceutical Science, Gachon University, Yeonsu-ku, Incheon, South Korea. 2 Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Yeonsu-ku, Incheon, South Korea. 3 Department of Biological Engineering, Inha University, Incheon, South Korea. 4 Department of Applied Bioscience, CHA University, Seoul, South Korea. 5 Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea. 6 Gachon Medical Research Institute, Gil Hospital, Incheon, South Korea. 7 Address correspondence to: Hee-Sook Jun, Ph.D., College of Pharmacy and Gachon Institute of Pharmaceutical Science, Gachon University, 7-45 Songdo-dong, Yeonsu-ku, Incheon 406-840, South Korea
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13
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Dao LTM, Park EY, Hwang OK, Cha JY, Jun HS. Differentiation potential and profile of nuclear receptor expression during expanded culture of human adipose tissue-derived stem cells reveals PPARγ as an important regulator of Oct4 expression. Stem Cells Dev 2013; 23:24-33. [PMID: 23998797 DOI: 10.1089/scd.2013.0137] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Potential therapeutic use of human adipose tissue-derived stem cells (hADSCs) requires the production of large cell numbers by in vitro expansion. However, long-term in vitro culture is associated with reduced stem cell characteristics and differentiation capability. We investigated the proliferation rate and expression of p16(INK4a) mRNA, surface stem cell markers, and stem cell transcription factors. The proliferation rate decreased significantly as passages increased, and the expression of p16(INK4a) mRNA significantly increased. FACS analysis of CD73, CD90, and CD105 expression showed no significant difference among examined passages; however, the mRNA expression levels of pluripotent markers, Oct4 and Nanog, were significantly decreased at higher passages. At passages 12 and 20, there was decreased differentiation capability into insulin-producing cells, evidenced by significantly decreased expression of insulin and related β cell markers. Adipogenic and osteogenic differentiation was also decreased at higher passages. We then analyzed the transcriptional expression profiles of 48 nuclear receptors at four different passages. We found that the expression of peroxisome proliferator-activated receptor γ (PPARγ) and thyroid hormone receptor TRβ was significantly decreased at higher passages. Treatment with PPARγ activators or overexpression of PPARγ in hADSCs at passage 20 could recover Oct4 expression levels and increase Oct4 promoter activity. PPARγ inactivation by GW9662 inhibited the troglitazone-induced Oct4 mRNA expression. Furthermore, PPARγ overexpression in hADSC at passage 20 improved the differentiation potential to insulin-producing cells. In conclusion, we demonstrated that hADSCs undergo characteristic changes and reduction of differentiation capability during expanded culture in vitro, and revealed the role of PPARγ as one potential factor in the regulation of Oct4 expression during in vitro aging of hADSCs.
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Affiliation(s)
- Lan T M Dao
- 1 College of Pharmacy and Gachon Institute of Pharmaceutical Science, Gachon University , Incheon, South Korea
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