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Lyu R, Gao Y, Wu T, Ye C, Wang P, He C. Quantitative analysis of cis-regulatory elements in transcription with KAS-ATAC-seq. Nat Commun 2024; 15:6852. [PMID: 39127768 PMCID: PMC11316786 DOI: 10.1038/s41467-024-50680-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 07/18/2024] [Indexed: 08/12/2024] Open
Abstract
Cis-regulatory elements (CREs) are pivotal in orchestrating gene expression throughout diverse biological systems. Accurate identification and in-depth characterization of functional CREs are crucial for decoding gene regulation networks during cellular processes. In this study, we develop Kethoxal-Assisted Single-stranded DNA Assay for Transposase-Accessible Chromatin with Sequencing (KAS-ATAC-seq) to quantitatively analyze the transcriptional activity of CREs. A main advantage of KAS-ATAC-seq lies in its precise measurement of ssDNA levels within both proximal and distal ATAC-seq peaks, enabling the identification of transcriptional regulatory sequences. This feature is particularly adept at defining Single-Stranded Transcribing Enhancers (SSTEs). SSTEs are highly enriched with nascent RNAs and specific transcription factors (TFs) binding sites that define cellular identity. Moreover, KAS-ATAC-seq provides a detailed characterization and functional implications of various SSTE subtypes. Our analysis of CREs during mouse neural differentiation demonstrates that KAS-ATAC-seq can effectively identify immediate-early activated CREs in response to retinoic acid (RA) treatment. Our findings indicate that KAS-ATAC-seq provides more precise annotation of functional CREs in transcription. Future applications of KAS-ATAC-seq would help elucidate the intricate dynamics of gene regulation in diverse biological processes.
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Affiliation(s)
- Ruitu Lyu
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA.
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA.
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA.
| | - Yun Gao
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA
| | - Tong Wu
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA
| | - Chang Ye
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA
| | - Pingluan Wang
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA
| | - Chuan He
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA.
- Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL, 60637, USA.
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL, 60637, USA.
- Howard Hughes Medical Institute, The University of Chicago, Chicago, IL, 60637, USA.
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Bai Y, Zhu Y, He X, Huang R, Xu X, Yang L, Wang Z, Zhu R. Size-Optimized Layered Double Hydroxide Nanoparticles Promote Neural Progenitor Cells Differentiation of Embryonic Stem Cells Through the Regulation of M 6A Methylation. Int J Nanomedicine 2024; 19:4181-4197. [PMID: 38766656 PMCID: PMC11100968 DOI: 10.2147/ijn.s463141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024] Open
Abstract
Purpose The committed differentiation fate regulation has been a difficult problem in the fields of stem cell research, evidence showed that nanomaterials could promote the differentiation of stem cells into specific cell types. Layered double hydroxide (LDH) nanoparticles possess the regulation function of stem cell fate, while the underlying mechanism needs to be investigated. In this study, the process of embryonic stem cells (ESCs) differentiate to neural progenitor cells (NPCs) by magnesium aluminum LDH (MgAl-LDH) was investigated. Methods MgAl-LDH with diameters of 30, 50, and 100 nm were synthesized and characterized, and their effects on the cytotoxicity and differentiation of NPCs were detected in vitro. Dot blot and MeRIP-qPCR were performed to detect the level of m6A RNA methylation in nanoparticles-treated cells. Results Our work displayed that LDH nanoparticles of three different sizes were biocompatible with NPCs, and the addition of MgAl-LDH could significantly promote the process of ESCs differentiate to NPCs. 100 nm LDH has a stronger effect on promoting NPCs differentiation compared to 30 nm and 50 nm LDH. In addition, dot blot results indicated that the enhanced NPCs differentiation by MgAl-LDH was closely related to m6A RNA methylation process, and the major modification enzyme in LDH controlled NPCs differentiation may be the m6A RNA methyltransferase METTL3. The upregulated METTL3 by LDH increased the m6A level of Sox1 mRNA, enhancing its stability. Conclusion This work reveals that MgAl-LDH nanoparticles can regulate the differentiation of ESCs into NPCs by increasing m6A RNA methylation modification of Sox1.
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Affiliation(s)
- Yuxin Bai
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Yanjing Zhu
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Xiaolie He
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Ruiqi Huang
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Xu Xu
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Li Yang
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Zhaojie Wang
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai, 200065, People’s Republic of China
| | - Rongrong Zhu
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, School of Life Science and Technology, Tongji University, Shanghai, 200065, People’s Republic of China
- Frontier Science Center for Stem Cell Research, Tongji University, Shanghai, 200065, People’s Republic of China
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Brown G. Retinoic acid receptor regulation of decision-making for cell differentiation. Front Cell Dev Biol 2023; 11:1182204. [PMID: 37082619 PMCID: PMC10110968 DOI: 10.3389/fcell.2023.1182204] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 03/27/2023] [Indexed: 04/07/2023] Open
Abstract
All-trans retinoic acid (ATRA) activation of retinoic acid receptors (RARs) is crucial to an organism's proper development as established by findings for mouse foetuses from dams fed a vitamin A-deficient diet. ATRA influences decision-making by embryonic stem (ES) cells for differentiation including lineage fate. From studies of knockout mice, RARα and RARγ regulate haematopoiesis whereby active RARα modulates the frequency of decision-making for myeloid differentiation, but is not essential for myelopoiesis, and active RARγ supports stem cell self-renewal and maintenance. From studies of zebrafish embryo development, active RARγ plays a negative role in stem cell decision-making for differentiation whereby, in the absence of exogenous ATRA, selective agonism of RARγ disrupted stem cell decision-making for differentiation patterning for development. From transactivation studies, 0.24 nM ATRA transactivated RARγ and 19.3 nM (80-fold more) was needed to transactivate RARα. Therefore, the dose of ATRA that cells are exposed to in vivo, from gradients created by cells that synthesize and metabolize, is important to RARγ versus RARα and RARγ activation and balancing of the involvements in modulating stem cell maintenance versus decision-making for differentiation. RARγ activation favours stemness whereas concomitant or temporal activation of RARγ and RARα favours differentiation. Crosstalk with signalling events that are provoked by membrane receptors is also important.
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Affiliation(s)
- Geoffrey Brown
- School of Biomedical Sciences, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
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Du J, Li Y, Su Y, Zhi W, Zhang J, Zhang C, Wang J, Deng W, Zhao S. LncRNA Pnky Positively Regulates Neural Stem Cell Migration by Modulating mRNA Splicing and Export of Target Genes. Cell Mol Neurobiol 2023; 43:1199-1218. [PMID: 35748966 DOI: 10.1007/s10571-022-01241-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 06/06/2022] [Indexed: 11/28/2022]
Abstract
Directed migration of neural stem cells (NSCs) is critical for embryonic neurogenesis and the healing of neurological injuries. The long noncoding RNA (lncRNA) Pnky has been reported to regulate neuronal differentiation of NSCs by interacting with PTBP1. However, its regulatory effect on NSC migration remains to be determined. Herein, we identified that Pnky is also a key regulator of NSC migration in mice, as underscored by the finding that Pnky silencing suppressed but Pnky overexpression promoted the in vitro migration of both C17.2 and NE4C murine NSCs. Additionally, in vivo cell tracking demonstrated that Pnky depletion attenuated but Pnky overexpression facilitated the migration of NE4C cells in the spinal canal after transplantation via injection into the spinal canal. Mechanistically, Pnky regulated the expression of a core set of critical regulators that direct NSC migration, including MMP2, MMP9, Connexin43, Paxillin, AKT, ERK, and P38MAPK. Using catRAPID, a web server for large-scale prediction of protein-RNA interactions, the splicing factors U2AF1 and U2AF1L4, as well as the mRNA export adaptors SARNP, Aly/Ref, and THOC7, were predicted to interact strongly with Pnky. Further investigations using colocalization and RNA immunoprecipitation (RIP) assays confirmed the direct binding of Pnky to U2AF1, SARNP, Aly/Ref, and THOC7. Transcriptomic profiling revealed that as many as 5319 differential splicing events of 3848 genes, which were highly enriched in focal adhesion, PI3K-Akt and MAPK signaling pathways, were affected by Pnky depletion. The predominant subtype of differential splicing by Pnky depletion is intron retention, followed by alternative 5' and 3' splice sites and mutually exclusive exons. Moreover, Pnky knockdown substantially blocked but Pnky overexpression facilitated the export of MMP2, Paxillin, AKT, p38MAPK, and other mRNAs to the cytosol. Collectively, our data showed that through interacting with U2AF1, SARNP, Aly/Ref, and THOC7, Pnky couples and modulates the splicing and export of target mRNAs, which consequently controlling NSC migration. These findings provide a possible theoretical basis of NSC migration regulation.
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Affiliation(s)
- Jiannan Du
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Yuan Li
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Yuting Su
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Wenqian Zhi
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Jiale Zhang
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Cheng Zhang
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Juan Wang
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China
| | - Wensheng Deng
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China.
| | - Shasha Zhao
- College of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei, 430065, People's Republic of China.
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Akter M, Ding B. Modeling Movement Disorders via Generation of hiPSC-Derived Motor Neurons. Cells 2022; 11:3796. [PMID: 36497056 PMCID: PMC9737271 DOI: 10.3390/cells11233796] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/19/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Generation of motor neurons (MNs) from human-induced pluripotent stem cells (hiPSCs) overcomes the limited access to human brain tissues and provides an unprecedent approach for modeling MN-related diseases. In this review, we discuss the recent progression in understanding the regulatory mechanisms of MN differentiation and their applications in the generation of MNs from hiPSCs, with a particular focus on two approaches: induction by small molecules and induction by lentiviral delivery of transcription factors. At each induction stage, different culture media and supplements, typical growth conditions and cellular morphology, and specific markers for validation of cell identity and quality control are specifically discussed. Both approaches can generate functional MNs. Currently, the major challenges in modeling neurological diseases using iPSC-derived neurons are: obtaining neurons with high purity and yield; long-term neuron culture to reach full maturation; and how to culture neurons more physiologically to maximize relevance to in vivo conditions.
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Affiliation(s)
| | - Baojin Ding
- Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, Shreveport, LA 71130-3932, USA
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Asson-Batres MA, Norwood CW. Effects of vitamin A and retinoic acid on mouse embryonic stem cells and their differentiating progeny. Methods Enzymol 2021; 637:341-365. [PMID: 32359652 DOI: 10.1016/bs.mie.2020.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Embryonic development is controlled by retinoids, and one approach that has been used to investigate the mechanisms for retinoid actions in developmental processes has been to study the effects of adding retinoids to cultures of pluripotent embryonic stem cells (ESC). To date, most in vitro retinoid research has been directed at deciphering the actions of all-trans retinoic acid (atRA). atRA is a derivative of all-trans retinol (a.k.a. vitamin A, VA), which mammals can generate via an enzyme-catalyzed pathway. atRA's effects on development result from its (1) activation of receptor complexes (RARs and RXRs) in the nucleus which then bind to and activate RA response elements (RAREs) in genes and (2) its interactions with processes that are initiated in the cytoplasm. While much work has focused on the impact of atRA on cell differentiation, VA, itself, has been shown to exert effects on the maintenance of ESC identity that are not dependent upon classic RA-signaling pathways. In this chapter, we present results from our laboratory and others using well-documented approaches for investigating the effects of retinoids on the differentiation of ESC in vitro and introduce a novel method that uses chemically-defined growth conditions. The merits of each approach are discussed.
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The triad of nanotechnology, cell signalling, and scaffold implantation for the successful repair of damaged organs: An overview on soft-tissue engineering. J Control Release 2021; 332:460-492. [DOI: 10.1016/j.jconrel.2021.02.036] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 12/11/2022]
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Angeloni C, Gatti M, Prata C, Hrelia S, Maraldi T. Role of Mesenchymal Stem Cells in Counteracting Oxidative Stress-Related Neurodegeneration. Int J Mol Sci 2020; 21:ijms21093299. [PMID: 32392722 PMCID: PMC7246730 DOI: 10.3390/ijms21093299] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 02/07/2023] Open
Abstract
Neurodegenerative diseases include a variety of pathologies such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, amyotrophic lateral sclerosis, and so forth, which share many common characteristics such as oxidative stress, glycation, abnormal protein deposition, inflammation, and progressive neuronal loss. The last century has witnessed significant research to identify mechanisms and risk factors contributing to the complex etiopathogenesis of neurodegenerative diseases, such as genetic, vascular/metabolic, and lifestyle-related factors, which often co-occur and interact with each other. Apart from several environmental or genetic factors, in recent years, much evidence hints that impairment in redox homeostasis is a common mechanism in different neurological diseases. However, from a pharmacological perspective, oxidative stress is a difficult target, and antioxidants, the only strategy used so far, have been ineffective or even provoked side effects. In this review, we report an analysis of the recent literature on the role of oxidative stress in Alzheimer’s and Parkinson’s diseases as well as in amyotrophic lateral sclerosis, retinal ganglion cells, and ataxia. Moreover, the contribution of stem cells has been widely explored, looking at their potential in neuronal differentiation and reporting findings on their application in fighting oxidative stress in different neurodegenerative diseases. In particular, the exposure to mesenchymal stem cells or their secretome can be considered as a promising therapeutic strategy to enhance antioxidant capacity and neurotrophin expression while inhibiting pro-inflammatory cytokine secretion, which are common aspects of neurodegenerative pathologies. Further studies are needed to identify a tailored approach for each neurodegenerative disease in order to design more effective stem cell therapeutic strategies to prevent a broad range of neurodegenerative disorders.
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Affiliation(s)
- Cristina Angeloni
- School of Pharmacy, University of Camerino, Via Gentile III da Varano, 62032 Camerino, Italy;
| | - Martina Gatti
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Via del Pozzo 71, 41124 Modena, Italy; (M.G.); (T.M.)
| | - Cecilia Prata
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
- Correspondence:
| | - Silvana Hrelia
- Department for Life Quality Studies, Alma Mater Studiorum—University of Bologna, Corso d’Augusto 237, 47921 Rimini, Italy;
| | - Tullia Maraldi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Via del Pozzo 71, 41124 Modena, Italy; (M.G.); (T.M.)
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