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Chen P, Long J, Hua T, Zheng Z, Xiao Y, Chen L, Yu K, Wu W, Zhang S. Transcriptome and open chromatin analysis reveals the process of myocardial cell development and key pathogenic target proteins in Long QT syndrome type 7. J Transl Med 2024; 22:307. [PMID: 38528561 PMCID: PMC10964537 DOI: 10.1186/s12967-024-05125-7] [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: 09/23/2023] [Accepted: 03/20/2024] [Indexed: 03/27/2024] Open
Abstract
OBJECTIVE Long QT syndrome type 7 (Andersen-Tawil syndrome, ATS), which is caused by KCNJ2 gene mutation, often leads to ventricular arrhythmia, periodic paralysis and skeletal malformations. The development, differentiation and electrophysiological maturation of cardiomyocytes (CMs) changes promote the pathophysiology of Long QT syndrome type 7(LQT7). We aimed to specifically reproduce the ATS disease phenotype and study the pathogenic mechanism. METHODS AND RESULTS We established a cardiac cell model derived from human induced pluripotent stem cells (hiPSCs) to the phenotypes and electrophysiological function, and the establishment of a human myocardial cell model that specifically reproduces the symptoms of ATS provides a reliable platform for exploring the mechanism of this disease or potential drugs. The spontaneous pulsation rate of myocardial cells in the mutation group was significantly lower than that in the repair CRISPR group, the action potential duration was prolonged, and the Kir2.1 current of the inward rectifier potassium ion channel was decreased, which is consistent with the clinical symptoms of ATS patients. Only ZNF528, a chromatin-accessible TF related to pathogenicity, was continuously regulated beginning from the cardiac mesodermal precursor cell stage (day 4), and continued to be expressed at low levels, which was identified by WGCNA method and verified with ATAC-seq data in the mutation group. Subsequently, it indicated that seven pathways were downregulated (all p < 0.05) by used single sample Gene Set Enrichment Analysis to evaluate the overall regulation of potassium-related pathways enriched in the transcriptome and proteome of late mature CMs. Among them, the three pathways (GO: 0008076, GO: 1990573 and GO: 0030007) containing the mutated gene KCNJ2 is involved that are related to the whole process by which a potassium ion enters the cell via the inward rectifier potassium channel to exert its effect were inhibited. The other four pathways are related to regulation of the potassium transmembrane pathway and sodium:potassium exchange ATPase (p < 0.05). ZNF528 small interfering (si)-RNA was applied to hiPSC-derived cardiomyocytes for CRISPR group to explore changes in potassium ion currents and growth and development related target protein levels that affect disease phenotype. Three consistently downregulated proteins (KCNJ2, CTTN and ATP1B1) associated with pathogenicity were verificated through correlation and intersection analysis. CONCLUSION This study uncovers TFs and target proteins related to electrophysiology and developmental pathogenicity in ATS myocardial cells, obtaining novel targets for potential therapeutic candidate development that does not rely on gene editing.
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Affiliation(s)
- Peipei Chen
- Department of Clinical Nutrition & Health Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Junyu Long
- Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tianrui Hua
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Zhifa Zheng
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ying Xiao
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Lianfeng Chen
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Kang Yu
- Department of Clinical Nutrition & Health Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Wei Wu
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Shuyang Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
- State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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Welsh AM, Muljo SA. Post-transcriptional (re)programming of B lymphocyte development: From bench to bedside? Adv Immunol 2024; 161:85-108. [PMID: 38763703 DOI: 10.1016/bs.ai.2024.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2024]
Abstract
Hematopoiesis, a process which generates blood and immune cells, changes significantly during mammalian development. Definitive hematopoiesis is marked by the emergence of long-term hematopoietic stem cells (HSCs). Here, we will focus on the post-transcriptional differences between fetal liver (FL) and adult bone marrow (ABM) HSCs. It remains unclear how or why exactly FL HSCs transition to ABM HSCs, but we aim to leverage their differences to revive an old idea: in utero HSC transplantation. Unexpectedly, the expression of certain RNA-binding proteins (RBPs) play an important role in HSC specification, and can be employed to convert or reprogram adult HSCs back to a fetal-like state. Among other features, FL HSCs have a broad differentiation capacity that includes the ability to regenerate both conventional B and T cells, as well as innate-like or unconventional lymphocytes such as B-1a and marginal zone B (MzB) cells. This chapter will focus on RNA binding proteins, namely LIN28B and IGF2BP3, that are expressed during fetal life and how they promote B-1a cell development. Furthermore, this chapter considers a potential clinical application of synthetic co-expression of LIN28B and IGF2BP3 in HSCs.
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Affiliation(s)
- Alia M Welsh
- Integrative Immunobiology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | - Stefan A Muljo
- Integrative Immunobiology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States.
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Ghosh A, Som A. Network analysis of transcriptomic data uncovers molecular signatures and the interplay of mRNAs, lncRNAs, and miRNAs in human embryonic stem cells. Differentiation 2024; 135:100738. [PMID: 38008592 DOI: 10.1016/j.diff.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 11/28/2023]
Abstract
Growing evidence has shown that besides the protein coding genes, the non-coding elements of the genome are indispensable for maintaining the property of self-renewal in human embryonic stem cells and in cell fate determination. However, the regulatory mechanisms and the landscape of interactions between the coding and non-coding elements is poorly understood. In this work, we used weighted gene co-expression network analysis (WGCNA) on transcriptomic data retrieved from RNA-seq and small RNA-seq experiments and reconstructed the core human pluripotency network (called PluriMLMiNet) consisting of 375 mRNA, 57 lncRNA and 207 miRNAs. Furthermore, we derived networks specific to the naïve and primed states of human pluripotency (called NaiveMLMiNet and PrimedMLMiNet respectively) that revealed a set of molecular markers (RPS6KA1, ZYG11A, ZNF695, ZNF273, and NLRP2 for naive state, and RAB34, TMEM178B, PTPRZ1, USP44, KIF1A and LRRN1 for primed state) which can be used to distinguish the pluripotent state from the non-pluripotent state and also to identify the intra-pluripotency states (i.e., naïve and primed state). The lncRNA DANT1 was found to be a crucial as it formed a bridge between the naive and primed state-specific networks. Analysis of the genes neighbouring DANT1 suggested its possible role as a competing endogenous RNA (ceRNA) for the induction and maintenance of human pluripotency. This was computationally validated by predicting the missing DANT1-miRNA interactions to complete the ceRNA circuit. Here we first report that DANT1 might harbour binding sites for miRNAs hsa-miR-30c-2-3p, hsa-miR-210-3p and hsa-let-7b-5p which may influence pluripotency.
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Affiliation(s)
- Arindam Ghosh
- Centre of Bioinformatics, Institute of Interdisciplinary Studies, University of Allahabad, Prayagraj, 211002, India; Institute of Biomedicine, University of Eastern Finland, FI-70210, Kuopio, Finland.
| | - Anup Som
- Centre of Bioinformatics, Institute of Interdisciplinary Studies, University of Allahabad, Prayagraj, 211002, India.
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Bobola N, Sagerström CG. TALE transcription factors: Cofactors no more. Semin Cell Dev Biol 2024; 152-153:76-84. [PMID: 36509674 DOI: 10.1016/j.semcdb.2022.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/27/2022] [Accepted: 11/30/2022] [Indexed: 12/14/2022]
Abstract
Exd/PBX, Hth/MEIS and PREP proteins belong to the TALE (three-amino-acid loop extension) superclass of transcription factors (TFs) with an atypical homedomain (HD). Originally discovered as "cofactors" to HOX proteins, revisiting their traditional role in light of genome-wide experiments reveals a strong and reproducible pattern of HOX and TALE co-occupancy across diverse embryonic tissues. While confirming that TALE increases HOX specificity and selectivity in vivo, this wider outlook also reveals novel aspects of HOX:TALE collaboration, namely that HOX TFs generally require pre-bound TALE factors to access their functional binding sites in vivo. In contrast to the restricted expression domains of HOX TFs, TALE factors are largely ubiquitous, and PBX and PREP are expressed at the earliest developmental stages. PBX and MEIS control development of many organs and tissues and their dysregulation is associated with congenital disease and cancer. Accordingly, many instances of TALE cooperation with non HOX TFs have been documented in various systems. The model that emerges from these studies is that TALE TFs create a permissive chromatin platform that is selected by tissue-restricted TFs for binding. In turn, HOX and other tissue-restricted TFs selectively convert a ubiquitous pool of low affinity TALE binding events into high confidence, tissue-restricted binding events associated with transcriptional activation. As a result, TALE:TF complexes are associated with active chromatin and domain/lineage-specific gene activity. TALE ubiquitous expression and broad genomic occupancy, as well as the increasing examples of TALE tissue-specific partners, reveal a universal and obligatory role for TALE in the control of tissue and lineage-specific transcriptional programs, beyond their initial discovery as HOX co-factors.
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Affiliation(s)
- Nicoletta Bobola
- School of Medical Sciences, University of Manchester, Manchester, UK.
| | - Charles G Sagerström
- Section of Developmental Biology, Department of Pediatrics, University of Colorado Medical School, Aurora, CO, USA.
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Murata T, Hama N, Kamatani T, Mori A, Otsuka R, Wada H, Seino KI. Induced pluripotent stem cell-derived hematopoietic stem and progenitor cells induce mixed chimerism and donor-specific allograft tolerance. Am J Transplant 2023; 23:1331-1344. [PMID: 37244443 DOI: 10.1016/j.ajt.2023.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 05/10/2023] [Accepted: 05/20/2023] [Indexed: 05/29/2023]
Abstract
In transplantation using allogeneic induced pluripotent stem cells (iPSCs), strategies focused on major histocompatibility complexes were adopted to avoid immune rejection. We showed that minor antigen mismatches are a risk factor for graft rejection, indicating that immune regulation remains one of the most important issues. In organ transplantation, it has been known that mixed chimerism using donor-derived hematopoietic stem/progenitor cells (HSPCs) can induce donor-specific tolerance. However, it is unclear whether iPSC-derived HSPCs (iHSPCs) can induce allograft tolerance. We showed that 2 hematopoietic transcription factors, Hoxb4 and Lhx2, can efficiently expand iHSPCs with a c-Kit+Sca-1+Lineage- phenotype, which possesses long-term hematopoietic repopulating potential. We also demonstrated that these iHSPCs can form hematopoietic chimeras in allogeneic recipients and induce allograft tolerance in murine skin and iPSC transplantation. With mechanistic analyses, both central and peripheral mechanisms were suggested. We demonstrated the basic concept of tolerance induction using iHSPCs in allogeneic iPSC-based transplantation.
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Affiliation(s)
- Tomoki Murata
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Naoki Hama
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tomoki Kamatani
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Akihiro Mori
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ryo Otsuka
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Haruka Wada
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ken-Ichiro Seino
- Division of Immunobiology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Hokkaido, Japan.
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Steens J, Klein D. HOX genes in stem cells: Maintaining cellular identity and regulation of differentiation. Front Cell Dev Biol 2022; 10:1002909. [PMID: 36176275 PMCID: PMC9514042 DOI: 10.3389/fcell.2022.1002909] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
Stem cells display a unique cell type within the body that has the capacity to self-renew and differentiate into specialized cell types. Compared to pluripotent stem cells, adult stem cells (ASC) such as mesenchymal stem cells (MSCs) and hematopoietic stem cells (HSCs) exhibit restricted differentiation capabilities that are limited to cell types typically found in the tissue of origin, which implicates that there must be a certain code or priming determined by the tissue of origin. HOX genes, a subset of homeobox genes encoding transcription factors that are generally repressed in undifferentiated pluripotent stem cells, emerged here as master regulators of cell identity and cell fate during embryogenesis, and in maintaining this positional identity throughout life as well as specifying various regional properties of respective tissues. Concurrently, intricate molecular circuits regulated by diverse stem cell-typical signaling pathways, balance stem cell maintenance, proliferation and differentiation. However, it still needs to be unraveled how stem cell-related signaling pathways establish and regulate ASC-specific HOX expression pattern with different temporal-spatial topography, known as the HOX code. This comprehensive review therefore summarizes the current knowledge of specific ASC-related HOX expression patterns and how these were integrated into stem cell-related signaling pathways. Understanding the mechanism of HOX gene regulation in stem cells may provide new ways to manipulate stem cell fate and function leading to improved and new approaches in the field of regenerative medicine.
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Shim SH, Tufa D, Woods R, George TD, Shank T, Yingst A, Lake J, Cobb L, Jones D, Jones K, Verneris MR. SAHA Enhances Differentiation of CD34+CD45+ Hematopoietic Stem and Progenitor Cells from Pluripotent Stem Cells Concomitant with an Increase in Hemogenic Endothelium. Stem Cells Transl Med 2022; 11:513-526. [PMID: 35349707 PMCID: PMC9154343 DOI: 10.1093/stcltm/szac012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 01/27/2022] [Indexed: 12/15/2022] Open
Abstract
Epigenetic modification is an important process during hematopoietic cell differentiation. Histone deacetylase (HDAC) inhibitors have previously been shown to enhance expansion of umbilical cord blood-derived hematopoietic stem cells (HSCs). However, the effect of HDAC inhibitors on pluripotent stem cells (PSCs) in this context is less understood. For years, investigators have considered PSC-derived natural killer (NK) and T-cell therapies. These "off-the-shelf" cellular therapies are now entering the clinic. However, the in vitro commitment of PSCs to the hematopoietic lineage is inefficient and represents a major bottleneck. We investigated whether HDAC inhibitors (HDACi) influence human PSC differentiation into CD34+CD45+ hematopoietic stem and progenitor cells (HSPCs), focusing on hemogenic endothelium (HE). Pluripotent stem cells cultured in the presence of HDACi showed a 2-5 times increase in HSPCs. Concurrent with this, HDACi-treated PSCs increased expression of 7 transcription factors (HOXA5, HOXA9, HOXA10, RUNX1, ERG, SPI1, and LCOR) recently shown to convert HE to HSPCs. ChIP-qPCR showed that SAHA upregulated acetylated-H3 at the promoter region of the above key genes. SAHA-treated human PSC-derived CD34+CD45+ cells showed primary engraftment in immunodeficient mice, but not serial transplantation. We further demonstrate that SAHA-derived HSPCs could differentiate into functional NK cells in vitro. The addition of SAHA is an easy and effective approach to overcoming the bottleneck in the transition from PSC to HSPCs for "off-the-shelf" cellular immunotherapy.
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Affiliation(s)
- Seon-Hui Shim
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Dejene Tufa
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Renee Woods
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Trahan D George
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Tyler Shank
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Ashley Yingst
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Jessica Lake
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Laura Cobb
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Dallas Jones
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
| | - Kenneth Jones
- Department of Cell Biology, University of Oklahoma School of Medicine, Oklahoma City, OK, USA
| | - Michael R Verneris
- University of Colorado and Children’s Hospital of Colorado, Department of Children’s Cancer and Blood Disorders, Aurora, CO, USA
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Li L, Ye Z, Yang S, Yang H, Jin J, Zhu Y, Tao J, Chen S, Xu J, Liu Y, Liang W, Wang B, Yang M, Huang Q, Chen Z, Li W, Fan JB, Liu D. Diagnosis of pulmonary nodules by DNA methylation analysis in bronchoalveolar lavage fluids. Clin Epigenetics 2021; 13:185. [PMID: 34620221 PMCID: PMC8499516 DOI: 10.1186/s13148-021-01163-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/30/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Lung cancer is the leading cause of cancer-related mortality. The alteration of DNA methylation plays a major role in the development of lung cancer. Methylation biomarkers become a possible method for lung cancer diagnosis. RESULTS We identified eleven lung cancer-specific methylation markers (CDO1, GSHR, HOXA11, HOXB4-1, HOXB4-2, HOXB4-3, HOXB4-4, LHX9, MIR196A1, PTGER4-1, and PTGER4-2), which could differentiate benign and malignant pulmonary nodules. The methylation levels of these markers are significantly higher in malignant tissues. In bronchoalveolar lavage fluid (BALF) samples, the methylation signals maintain the same differential trend as in tissues. An optimal 5-marker model for pulmonary nodule diagnosis (malignant vs. benign) was developed from all possible combinations of the eleven markers. In the test set (57 tissue and 71 BALF samples), the area under curve (AUC) value achieves 0.93, and the overall sensitivity is 82% at the specificity of 91%. In an independent validation set (111 BALF samples), the AUC is 0.82 with a specificity of 82% and a sensitivity of 70%. CONCLUSIONS This model can differentiate pulmonary adenocarcinoma and squamous carcinoma from benign diseases, especially for infection, inflammation, and tuberculosis. The model's performance is not affected by gender, age, smoking history, or the solid components of nodules.
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Affiliation(s)
- Lei Li
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Zhujia Ye
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Sai Yang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Hao Yang
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Jing Jin
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Yingying Zhu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Jinsheng Tao
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Siyu Chen
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Jiehan Xu
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Yanying Liu
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Weihe Liang
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Bo Wang
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China
| | - Mengzhu Yang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Qiaoyun Huang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China
| | - Zhiwei Chen
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China.
- AnchorDx, Inc., 46305 Landing Pkwy, Fremont, CA, 94538, USA.
| | - Weimin Li
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China.
| | - Jian-Bing Fan
- AnchorDx. Medical Co., Ltd. Unit 502, 3rd Luoxuan Road, International Bio-Island, Guangzhou, 510300, Guangdong, China.
- Department of Pathology, School of Basic Medical Science, Southern Medical University, 1838 ShaTai Road, Guangzhou, 510515, China.
| | - Dan Liu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu, 610041, Sichuan, China.
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Lin S, Chen Q, Zhang L, Ge S, Luo Y, He W, Xu C, Zeng M. Overexpression of HOXB4 Promotes Protection of Bone Marrow Mesenchymal Stem Cells Against Lipopolysaccharide-Induced Acute Lung Injury Partially Through the Activation of Wnt/β-Catenin Signaling. J Inflamm Res 2021; 14:3637-3649. [PMID: 34349541 PMCID: PMC8326777 DOI: 10.2147/jir.s319416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 07/19/2021] [Indexed: 12/12/2022] Open
Abstract
Purpose Pulmonary vascular endothelial cell (EC) injury is recognized as one of the pathological factors of acute lung injury/acute respiratory distress syndrome (ALI/ARDS). Bone marrow mesenchymal stem cell (BMSC)-based cytotherapy has attracted substantial attention over recent years as a promising therapeutic approach for ALI/ARDS; however, its use remains limited due to inconsistent efficacy. Currently, gene modification techniques are widely applied to MSCs. In the present study, we aimed to investigate the effect of BMSCs overexpressing Homeobox B4 (HOXB4) on lipopolysaccharide (LPS)-induced EC injury. Methods We used LPS to induce EC injury and established EC-BMSC coculture system using transwell chambers. The effect of BMSCs on ECs was explored by detecting EC proliferation, apoptosis, migration, tube formation, and permeability, and determining whether the Wnt/β-catenin pathway is involved in the regulatory mechanism using XAV-939, inhibitor of Wnt/ β-catenin. Results As compared to BMSCWT, BMSCHOXB4 coculture promoted EC proliferation, migration, and tube formation after LPS stimulation and attenuated LPS-induced EC apoptosis and vascular permeability. Mechanistically, BMSCHOXB4 coculture prevented LPS-induced EC injury by activating the Wnt/β-catenin pathway, which is partially reversible by XAV-939. When cocultured with BMSCHOXB4, pro-inflammatory factors were dramatically decreased and anti-inflammatory factors were greatly increased in the EC medium compared to those in the LPS group (P<0.05). Additionally, when compared to BMSCWT coculture, the BMSCHOXB4 coculture showed an enhanced modulation of IL-6, TNF-α, and IL-10, but there was no statistically significant effect on IL-1β and IL-4. Conclusion Coculturing of BMSCHOXB4 prevented LPS-induced EC injury by reversing the inactivation of the Wnt/β-catenin signaling pathway. An in vivo study remains warranted to ascertain whether engraftment of BMSCHOXB4 can be an attractive strategy for the treatment of ALI/ARDS.
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Affiliation(s)
- Shan Lin
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Qingui Chen
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Lishan Zhang
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Shanhui Ge
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Yuling Luo
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Wanmei He
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
| | - Caixia Xu
- Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, People's Republic of China
| | - Mian Zeng
- Department of Medical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510080, People's Republic of China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, Guangdong, People's Republic of China
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10
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Stefanovic S, Laforest B, Desvignes JP, Lescroart F, Argiro L, Maurel-Zaffran C, Salgado D, Plaindoux E, De Bono C, Pazur K, Théveniau-Ruissy M, Béroud C, Puceat M, Gavalas A, Kelly RG, Zaffran S. Hox-dependent coordination of mouse cardiac progenitor cell patterning and differentiation. eLife 2020; 9:55124. [PMID: 32804075 PMCID: PMC7462617 DOI: 10.7554/elife.55124] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 08/16/2020] [Indexed: 12/15/2022] Open
Abstract
Perturbation of addition of second heart field (SHF) cardiac progenitor cells to the poles of the heart tube results in congenital heart defects (CHD). The transcriptional programs and upstream regulatory events operating in different subpopulations of the SHF remain unclear. Here, we profile the transcriptome and chromatin accessibility of anterior and posterior SHF sub-populations at genome-wide levels and demonstrate that Hoxb1 negatively regulates differentiation in the posterior SHF. Spatial mis-expression of Hoxb1 in the anterior SHF results in hypoplastic right ventricle. Activation of Hoxb1 in embryonic stem cells arrests cardiac differentiation, whereas Hoxb1-deficient mouse embryos display premature cardiac differentiation. Moreover, ectopic differentiation in the posterior SHF of embryos lacking both Hoxb1 and its paralog Hoxa1 results in atrioventricular septal defects. Our results show that Hoxb1 plays a key role in patterning cardiac progenitor cells that contribute to both cardiac poles and provide new insights into the pathogenesis of CHD.
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Affiliation(s)
- Sonia Stefanovic
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - Brigitte Laforest
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | | | - Fabienne Lescroart
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - Laurent Argiro
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | | | - David Salgado
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - Elise Plaindoux
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | | | - Kristijan Pazur
- Paul Langerhans Institute Dresden (PLID) of Helmholtz Center Munich at the University Clinic Carl Gustave Carus of TU Dresden, Helmoholtz Zentrum München, German Center for Diabetes Research (DZD), Dresden, Germany
| | - Magali Théveniau-Ruissy
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France.,Aix Marseille Univ, CNRS UMR7288, IBDM, Marseille, France
| | - Christophe Béroud
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - Michel Puceat
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - Anthony Gavalas
- Paul Langerhans Institute Dresden (PLID) of Helmholtz Center Munich at the University Clinic Carl Gustave Carus of TU Dresden, Helmoholtz Zentrum München, German Center for Diabetes Research (DZD), Dresden, Germany
| | - Robert G Kelly
- Aix Marseille Univ, CNRS UMR7288, IBDM, Marseille, France
| | - Stephane Zaffran
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
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11
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Li N, Gou JH, Xiong J, You JJ, Li ZY. HOXB4 promotes the malignant progression of ovarian cancer via DHDDS. BMC Cancer 2020; 20:222. [PMID: 32178630 PMCID: PMC7077141 DOI: 10.1186/s12885-020-06725-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 03/09/2020] [Indexed: 12/18/2022] Open
Abstract
Background Homeobox B4 (HOXB4) is correlated with poor prognosis of various cancer types. However, how HOXB4 promotes ovarian cancer (OV) progression remains unclear. Methods The Cancer Genome Atlas (TCGA) database indicated that a high level of HOXB4 in OV was correlated with poor prognosis. The biological functions of HOXB4 were confirmed by colony formation, migration, and invasion assays. The effect of HOXB4 on the expression of EMT cell markers was determined. The transcriptional target of HOXB4 was DHDDS, which was detected by a ChIP assay. A xenograft tumor model was generated in nude mice to detect the role of HOXB4 in tumor proliferation and metastasis. Results The results showed that HOXB4 protein levels were higher in OV tissues than in normal tissues and correlated with poor prognosis of OV. HOXB4 reduction inhibited the proliferation and invasion ability of OV cells in vitro. Conversely, these effects were enhanced by the upregulation of HOXB4 in OV cells. The binding of HOXB4 to two DNA motifs regulated DHDDS expression and contributed to the malignant progression of OV. The role of HOXB4 in contributing to tumor development in vivo was verified in mice. Further results indicated that HOXB4 induced Snail and Zeb1 expression. Conclusion Overall, HOXB4 overexpression was remarkably correlated with poor prognosis of OV. Mechanistically, HOXB4 enhances the proliferation and invasion of tumor cells by activating DHDDS, thereby promoting the malignant progression of OV.
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Affiliation(s)
- Na Li
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, People's Republic of China.,Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, P.R. China.,Department of Obstetrics and Gynecology, The first affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563000, People's Republic of China
| | - Jin-Hai Gou
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, People's Republic of China.,Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, P.R. China
| | - Jiao Xiong
- Department of Obstetrics and Gynecology, The first affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563000, People's Republic of China
| | - Juan-Juan You
- Department of Obstetrics and Gynecology, The first affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563000, People's Republic of China
| | - Zheng-Yu Li
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, People's Republic of China. .,Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, P.R. China.
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12
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Synergy of NUP98-HOXA10 Fusion Gene and NrasG12D Mutation Preserves the Stemness of Hematopoietic Stem Cells on Culture Condition. Cells 2019; 8:cells8090951. [PMID: 31443434 PMCID: PMC6770072 DOI: 10.3390/cells8090951] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/08/2019] [Accepted: 08/16/2019] [Indexed: 12/21/2022] Open
Abstract
Natural hematopoietic stem cells (HSC) are susceptible and tend to lose stemness, differentiate, or die on culture condition in vitro, which adds technical challenge for maintaining bona fide HSC-like cells, if ever generated, in protocol screening from pluripotent stem cells. It remains largely unknown whether gene-editing of endogenous genes can genetically empower HSC to endure the culture stress and preserve stemness. In this study, we revealed that both NUP98-HOXA10HD fusion and endogenous Nras mutation modifications (NrasG12D) promoted the engraftment competitiveness of HSC. Furthermore, the synergy of these two genetic modifications endowed HSC with super competitiveness in vivo. Strikingly, single NAV-HSC successfully maintained its stemness and showed robust multi-lineage engraftments after undergoing the in vitro culture. Mechanistically, NUP98-HOXA10HD fusion and NrasG12D mutation distinctly altered multiple pathways involving the cell cycle, cell division, and DNA replication, and distinctly regulated stemness-related genes including Hoxa9, Prdm16, Hoxb4, Trim27, and Smarcc1 in the context of HSC. Thus, we develop a super-sensitive transgenic model reporting the existence of HSC at the single cell level on culture condition, which could be beneficial for protocol screening of bona fide HSC regeneration from pluripotent stem cells in vitro.
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13
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A Case of Identity: HOX Genes in Normal and Cancer Stem Cells. Cancers (Basel) 2019; 11:cancers11040512. [PMID: 30974862 PMCID: PMC6521190 DOI: 10.3390/cancers11040512] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 12/14/2022] Open
Abstract
Stem cells are undifferentiated cells that have the unique ability to self-renew and differentiate into many different cell types. Their function is controlled by core gene networks whose misregulation can result in aberrant stem cell function and defects of regeneration or neoplasia. HOX genes are master regulators of cell identity and cell fate during embryonic development. They play a crucial role in embryonic stem cell differentiation into specific lineages and their expression is maintained in adult stem cells along differentiation hierarchies. Aberrant HOX gene expression is found in several cancers where they can function as either oncogenes by sustaining cell proliferation or tumor-suppressor genes by controlling cell differentiation. Emerging evidence shows that abnormal expression of HOX genes is involved in the transformation of adult stem cells into cancer stem cells. Cancer stem cells have been identified in most malignancies and proved to be responsible for cancer initiation, recurrence, and metastasis. In this review, we consider the role of HOX genes in normal and cancer stem cells and discuss how the modulation of HOX gene function could lead to the development of novel therapeutic strategies that target cancer stem cells to halt tumor initiation, progression, and resistance to treatment.
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14
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Luo Z, Rhie SK, Farnham PJ. The Enigmatic HOX Genes: Can We Crack Their Code? Cancers (Basel) 2019; 11:cancers11030323. [PMID: 30866492 PMCID: PMC6468460 DOI: 10.3390/cancers11030323] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/01/2019] [Accepted: 03/01/2019] [Indexed: 02/06/2023] Open
Abstract
Homeobox genes (HOX) are a large family of transcription factors that direct the formation of many body structures during early embryonic development. There are 39 genes in the subgroup of homeobox genes that constitute the human HOX gene family. Correct embryonic development of flies and vertebrates is, in part, mediated by the unique and highly regulated expression pattern of the HOX genes. Disruptions in these fine-tuned regulatory mechanisms can lead to developmental problems and to human diseases such as cancer. Unfortunately, the molecular mechanisms of action of the HOX family of transcription factors are severely under-studied, likely due to idiosyncratic details of their structure, expression, and function. We suggest that a concerted and collaborative effort to identify interacting protein partners, produce genome-wide binding profiles, and develop HOX network inhibitors in a variety of human cell types will lead to a deeper understanding of human development and disease. Within, we review the technological challenges and possible approaches needed to achieve this goal.
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Affiliation(s)
- Zhifei Luo
- Department of Biochemistry and Molecular Medicine and the Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Suhn K Rhie
- Department of Biochemistry and Molecular Medicine and the Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
| | - Peggy J Farnham
- Department of Biochemistry and Molecular Medicine and the Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
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15
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Alsayegh K, Cortés-Medina LV, Ramos-Mandujano G, Badraiq H, Li M. Hematopoietic Differentiation of Human Pluripotent Stem Cells: HOX and GATA Transcription Factors as Master Regulators. Curr Genomics 2019; 20:438-452. [PMID: 32194342 PMCID: PMC7062042 DOI: 10.2174/1389202920666191017163837] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 09/04/2019] [Accepted: 09/27/2019] [Indexed: 02/07/2023] Open
Abstract
Numerous human disorders of the blood system would directly or indirectly benefit from therapeutic approaches that reconstitute the hematopoietic system. Hematopoietic stem cells (HSCs), either from matched donors or ex vivo manipulated autologous tissues, are the most used cellular source of cell therapy for a wide range of disorders. Due to the scarcity of matched donors and the difficulty of ex vivo expansion of HSCs, there is a growing interest in harnessing the potential of pluripotent stem cells (PSCs) as a de novo source of HSCs. PSCs make an ideal source of cells for regenerative medicine in general and for treating blood disorders in particular because they could expand indefinitely in culture and differentiate to any cell type in the body. However, advancement in deriving functional HSCs from PSCs has been slow. This is partly due to an incomplete understanding of the molecular mechanisms underlying normal hematopoiesis. In this review, we discuss the latest efforts to generate human PSC (hPSC)-derived HSCs capable of long-term engraftment. We review the regulation of the key transcription factors (TFs) in hematopoiesis and hematopoietic differentiation, the Homeobox (HOX) and GATA genes, and the interplay between them and microRNAs. We also propose that precise control of these master regulators during the course of hematopoietic differentiation is key to achieving functional hPSC-derived HSCs.
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Affiliation(s)
- Khaled Alsayegh
- King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia.,Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Lorena V Cortés-Medina
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Gerardo Ramos-Mandujano
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Heba Badraiq
- King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia
| | - Mo Li
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
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16
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Role of HOX Genes in Stem Cell Differentiation and Cancer. Stem Cells Int 2018; 2018:3569493. [PMID: 30154863 PMCID: PMC6081605 DOI: 10.1155/2018/3569493] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 05/08/2018] [Accepted: 05/15/2018] [Indexed: 02/07/2023] Open
Abstract
HOX genes encode an evolutionarily conserved set of transcription factors that control how the phenotype of an organism becomes organized during development based on its genetic makeup. For example, in bilaterian-type animals, HOX genes are organized in gene clusters that encode anatomic segment identity, that is, whether the embryo will form with bilateral symmetry with a head (anterior), tail (posterior), back (dorsal), and belly (ventral). Although HOX genes are known to regulate stem cell (SC) differentiation and HOX genes are dysregulated in cancer, the mechanisms by which dysregulation of HOX genes in SCs causes cancer development is not fully understood. Therefore, the purpose of this manuscript was (i) to review the role of HOX genes in SC differentiation, particularly in embryonic, adult tissue-specific, and induced pluripotent SC, and (ii) to investigate how dysregulated HOX genes in SCs are responsible for the development of colorectal cancer (CRC) and acute myeloid leukemia (AML). We analyzed HOX gene expression in CRC and AML using information from The Cancer Genome Atlas study. Finally, we reviewed the literature on HOX genes and related therapeutics that might help us understand ways to develop SC-specific therapies that target aberrant HOX gene expression that contributes to cancer development.
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17
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Teichweyde N, Kasperidus L, Carotta S, Kouskoff V, Lacaud G, Horn PA, Heinrichs S, Klump H. HOXB4 Promotes Hemogenic Endothelium Formation without Perturbing Endothelial Cell Development. Stem Cell Reports 2018; 10:875-889. [PMID: 29456178 PMCID: PMC5919293 DOI: 10.1016/j.stemcr.2018.01.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 12/25/2022] Open
Abstract
Generation of hematopoietic stem cells (HSCs) from pluripotent stem cells, in vitro, holds great promise for regenerative therapies. Primarily, this has been achieved in mouse cells by overexpression of the homeotic selector protein HOXB4. The exact cellular stage at which HOXB4 promotes hematopoietic development, in vitro, is not yet known. However, its identification is a prerequisite to unambiguously identify the molecular circuits controlling hematopoiesis, since the activity of HOX proteins is highly cell and context dependent. To identify that stage, we retrovirally expressed HOXB4 in differentiating mouse embryonic stem cells (ESCs). Through the use of Runx1(-/-) ESCs containing a doxycycline-inducible Runx1 coding sequence, we uncovered that HOXB4 promoted the formation of hemogenic endothelium cells without altering endothelial cell development. Whole-transcriptome analysis revealed that its expression mediated the upregulation of transcription of core transcription factors necessary for hematopoiesis, culminating in the formation of blood progenitors upon initiation of Runx1 expression.
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Affiliation(s)
- Nadine Teichweyde
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
| | - Lara Kasperidus
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany; Department of Bone Marrow Transplantation, University Hospital Essen, Hufelandstraße 55, 45147 Essen, Germany
| | - Sebastian Carotta
- Cancer Cell Signaling, Boehringer Ingelheim RCV, Dr Boehringer-Gasse, 1120 Vienna, Austria
| | - Valerie Kouskoff
- Cancer Research UK Stem Cell Haematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Georges Lacaud
- Cancer Research UK Stem Cell Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Peter A Horn
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
| | - Stefan Heinrichs
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany
| | - Hannes Klump
- Institute for Transfusion Medicine, University Hospital Essen, Virchowstraße 179, 45147 Essen, Germany.
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18
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Chow PW, Rajab NF, Chua KH, Chan KM, Abd Hamid Z. Differential responses of lineages-committed hematopoietic progenitors and altered expression of self-renewal and differentiation-related genes in 1,4-benzoquinone (1,4-BQ) exposure. Toxicol In Vitro 2018; 46:122-128. [DOI: 10.1016/j.tiv.2017.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 04/12/2017] [Accepted: 10/02/2017] [Indexed: 01/10/2023]
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19
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The IRX1/HOXA connection: insights into a novel t(4;11)- specific cancer mechanism. Oncotarget 2018; 7:35341-52. [PMID: 27175594 PMCID: PMC5085233 DOI: 10.18632/oncotarget.9241] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 04/16/2016] [Indexed: 01/01/2023] Open
Abstract
One hallmark of MLL-r leukemia is the highly specific gene expression signature indicative for commonly deregulated target genes. An usual read-out for this transcriptional deregulation is the HOXA gene cluster, where upregulated HOXA genes are detected in MLL-r AML and ALL patients. In case of t(4;11) leukemia, this simple picture becomes challenged, because these patients separate into HOXAhi- and HOXAlo-patients. HOXAlo-patients showed a reduced HOXA gene transcription, but instead overexpressed the homeobox gene IRX1. This transcriptional pattern was associated with a higher relapse rate and worse outcome. Here, we demonstrate that IRX1 binds to the MLL-AF4 complex at target gene promotors and counteract its promotor activating function. In addition, IRX1 induces transcription of HOXB4 and EGR family members. HOXB4 is usually a downstream target of c-KIT, WNT and TPO signaling pathways and necessary for maintaining and expanding in hematopoietic stem cells. EGR proteins control a p21-dependent quiescence program for hematopoietic stem cells. Both IRX1-dependend actions may help t(4;11) leukemia cells to establish a stem cell compartment. We also demonstrate that HDACi administration is functionally interfering with IRX1 and MLL-AF4, a finding which could help to improve new treatment options for t(4;11) patients.
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20
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Franks TM, McCloskey A, Shokirev MN, Benner C, Rathore A, Hetzer MW. Nup98 recruits the Wdr82-Set1A/COMPASS complex to promoters to regulate H3K4 trimethylation in hematopoietic progenitor cells. Genes Dev 2017; 31:2222-2234. [PMID: 29269482 PMCID: PMC5769767 DOI: 10.1101/gad.306753.117] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/21/2017] [Indexed: 12/26/2022]
Abstract
In this study, Franks et al. investigated the mechanisms underlying how Nup98 regulates gene expression. They show that in hematopoietic cells, Nup98 binds predominantly to transcription start sites to recruit the Wdr82–Set1A/COMPASS complex, which is required for deposition of the histone 3 Lys4 trimethyl (H3K4me3)-activating mark, and expression of a Nup98 fusion protein implicated in aggressive AML causes mislocalization of H3K4me3 at aberrant regions and up-regulation of associated genes due to aberrant Wdr82/Set1A activity. Recent studies have shown that a subset of nucleoporins (Nups) can detach from the nuclear pore complex and move into the nuclear interior to regulate transcription. One such dynamic Nup, called Nup98, has been implicated in gene activation in healthy cells and has been shown to drive leukemogenesis when mutated in patients with acute myeloid leukemia (AML). Here we show that in hematopoietic cells, Nup98 binds predominantly to transcription start sites to recruit the Wdr82–Set1A/COMPASS (complex of proteins associated with Set1) complex, which is required for deposition of the histone 3 Lys4 trimethyl (H3K4me3)-activating mark. Depletion of Nup98 or Wdr82 abolishes Set1A recruitment to chromatin and subsequently ablates H3K4me3 at adjacent promoters. Furthermore, expression of a Nup98 fusion protein implicated in aggressive AML causes mislocalization of H3K4me3 at abnormal regions and up-regulation of associated genes. Our findings establish a function of Nup98 in hematopoietic gene activation and provide mechanistic insight into which Nup98 leukemic fusion proteins promote AML.
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Affiliation(s)
- Tobias M Franks
- Laboratory of Molecular and Cellular Biology, Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Asako McCloskey
- Laboratory of Molecular and Cellular Biology, Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Maxim Nikolaievich Shokirev
- The Razavi Newman Integrative Genomics and Bioinformatics Core, Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Chris Benner
- Laboratory of Molecular and Cellular Biology, Salk Institute for Biological Studies, La Jolla, California 92037, USA.,Department of Medicine, University of California at San Diego, La Jolla, California 92093, USA
| | - Annie Rathore
- Laboratory of Molecular and Cellular Biology, Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Martin W Hetzer
- Laboratory of Molecular and Cellular Biology, Salk Institute for Biological Studies, La Jolla, California 92037, USA
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21
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Lu YF, Cahan P, Ross S, Sahalie J, Sousa PM, Hadland BK, Cai W, Serrao E, Engelman AN, Bernstein ID, Daley GQ. Engineered Murine HSCs Reconstitute Multi-lineage Hematopoiesis and Adaptive Immunity. Cell Rep 2017; 17:3178-3192. [PMID: 28009288 DOI: 10.1016/j.celrep.2016.11.077] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 10/03/2016] [Accepted: 11/24/2016] [Indexed: 12/21/2022] Open
Abstract
Hematopoietic stem cell (HSC) transplantation is curative for malignant and genetic blood disorders, but is limited by donor availability and immune-mismatch. Deriving HSCs from patient-matched embryonic/induced-pluripotent stem cells (ESCs/iPSCs) could address these limitations. Prior efforts in murine models exploited ectopic HoxB4 expression to drive self-renewal and enable multi-lineage reconstitution, yet fell short in delivering robust lymphoid engraftment. Here, by titrating exposure of HoxB4-ESC-HSC to Notch ligands, we report derivation of engineered HSCs that self-renew, repopulate multi-lineage hematopoiesis in primary and secondary engrafted mice, and endow adaptive immunity in immune-deficient recipients. Single-cell analysis shows that following engraftment in the bone marrow niche, these engineered HSCs further specify to a hybrid cell type, in which distinct gene regulatory networks of hematopoietic stem/progenitors and differentiated hematopoietic lineages are co-expressed. Our work demonstrates engineering of fully functional HSCs via modulation of genetic programs that govern self-renewal and lineage priming.
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Affiliation(s)
- Yi-Fen Lu
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA
| | - Patrick Cahan
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Biomedical Engineering, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Samantha Ross
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA
| | - Julie Sahalie
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA
| | - Patricia M Sousa
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA
| | - Brandon K Hadland
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA
| | - Wenqing Cai
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA
| | - Erik Serrao
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Alan N Engelman
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Irwin D Bernstein
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA; Department of Pediatrics, University of Washington, Seattle, WA 98105, USA
| | - George Q Daley
- Stem Cell Transplantation Program, Division of Pediatric Hematology/Oncology, Howard Hughes Medical Institute, Children's Hospital Boston, Boston, MA 02115, USA; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA.
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22
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Sugiyama D, Joshi A, Kulkeaw K, Tan KS, Yokoo-Inoue T, Mizuochi-Yanagi C, Yasuda K, Doi A, Iino T, Itoh M, Nagao-Sato S, Tani K, Akashi K, Hayashizaki Y, Suzuki H, Kawaji H, Carninci P, Forrest ARR. A Transcriptional Switch Point During Hematopoietic Stem and Progenitor Cell Ontogeny. Stem Cells Dev 2017; 26:314-327. [PMID: 27848279 DOI: 10.1089/scd.2016.0194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
During mammalian embryogenesis, hematopoietic stem and progenitor cells (HSPCs) originate from mesoderm-derived endothelial cells in the aorta-gonad-mesonephros (AGM) region and placenta (PL). Later, HSPCs expand in fetal liver (FL) and migrate to bone marrow (BM) shortly before birth. Understanding global transcriptional regulation governing HSPC emergence from embryonic stem/induced pluripotent stem cells is necessary to devise clinical applications, such as novel transplantation approaches. In this study, to assess transcriptional dynamics during development, we performed cap analysis of gene expression on 10 developmental murine HSPC populations isolated from the AGM region, PL, FL, and BM and identified 15,681 transcripts across HSPC ontogeny. We performed microarray analysis of AGM-derived HSPCs at 9.5 and 10.5 days postcoitum (dpc) and identified 40 differentially expressed genes, 23 confirmed as significantly changed by real-time polymerase chain reaction. We conclude that a transcriptional switch point occurs in HSPC ontogeny between 9.5 and 10.5 dpc in the AGM region.
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Affiliation(s)
- Daisuke Sugiyama
- 1 Department of Research and Development of Next Generation Medicine, Faculty of Medical Sciences, Kyushu University , Fukuoka, Japan .,2 Center for Clinical and Translational Research, Kyushu University , Fukuoka, Japan .,3 Department of Clinical Study, Center for Advanced Medical Innovation, Kyushu University , Fukuoka, Japan
| | - Anagha Joshi
- 4 The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh , Easter Bush Campus, Midlothian, United Kingdom
| | - Kasem Kulkeaw
- 1 Department of Research and Development of Next Generation Medicine, Faculty of Medical Sciences, Kyushu University , Fukuoka, Japan
| | - Keai Sinn Tan
- 1 Department of Research and Development of Next Generation Medicine, Faculty of Medical Sciences, Kyushu University , Fukuoka, Japan
| | - Tomoko Yokoo-Inoue
- 1 Department of Research and Development of Next Generation Medicine, Faculty of Medical Sciences, Kyushu University , Fukuoka, Japan
| | - Chiyo Mizuochi-Yanagi
- 1 Department of Research and Development of Next Generation Medicine, Faculty of Medical Sciences, Kyushu University , Fukuoka, Japan
| | | | | | - Tadafumi Iino
- 3 Department of Clinical Study, Center for Advanced Medical Innovation, Kyushu University , Fukuoka, Japan
| | - Masayoshi Itoh
- 6 RIKEN Preventive Medicine and Diagnosis Innovation Program , Yokohama, Japan .,7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan .,8 RIKEN Yokohama Institute , Omics Science Center, Yokohama, Kanagawa, Japan
| | - Sayaka Nagao-Sato
- 8 RIKEN Yokohama Institute , Omics Science Center, Yokohama, Kanagawa, Japan
| | - Kenzaburo Tani
- 9 Division of Molecular and Clinical Genetics, Medical Institute of Bioregulation, Kyushu University , Fukuoka, Japan
| | - Koichi Akashi
- 10 Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences , Fukuoka, Japan
| | - Yoshihide Hayashizaki
- 6 RIKEN Preventive Medicine and Diagnosis Innovation Program , Yokohama, Japan .,7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan
| | - Harukazu Suzuki
- 7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan
| | - Hideya Kawaji
- 6 RIKEN Preventive Medicine and Diagnosis Innovation Program , Yokohama, Japan .,7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan .,8 RIKEN Yokohama Institute , Omics Science Center, Yokohama, Kanagawa, Japan
| | - Piero Carninci
- 6 RIKEN Preventive Medicine and Diagnosis Innovation Program , Yokohama, Japan .,7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan .,8 RIKEN Yokohama Institute , Omics Science Center, Yokohama, Kanagawa, Japan
| | - Alistair R R Forrest
- 7 RIKEN Center for Life Science Technologies , Division of Genomic Technologies, Yokohama, Japan
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23
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Controlled stem cell amplification by HOXB4 depends on its unique proline-rich region near the N terminus. Blood 2016; 129:319-323. [PMID: 27827825 DOI: 10.1182/blood-2016-04-706978] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 10/29/2016] [Indexed: 01/09/2023] Open
Abstract
There is high interest in understanding the mechanisms that drive self-renewal of stem cells. HOXB4 is one of the few transcription factors that can amplify long-term repopulating hematopoietic stem cells in a controlled way. Here we show in mice that this characteristic of HOXB4 depends on a proline-rich sequence near the N terminus, which is unique among HOX genes and highly conserved in higher mammals. Deletion of this domain substantially enhanced the oncogenicity of HOXB4, inducing acute leukemia in mice. Conversely, insertion of the domain into Hoxa9 impaired leukemogenicity of this homeobox gene. These results indicate that proline-rich stretches attenuate the potential of stem cell active homeobox genes to acquire oncogenic properties.
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24
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Mi X, Tang W, Chen X, Liu F, Tang X. Mitofusin 2 attenuates the histone acetylation at collagen IV promoter in diabetic nephropathy. J Mol Endocrinol 2016; 57:233-249. [PMID: 27997345 DOI: 10.1530/jme-16-0031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/03/2016] [Indexed: 12/15/2022]
Abstract
Extracellular matrix (ECM) increase in diabetic nephropathy (DN) is closely related to mitochondrial dysfunction. The mechanism of protective function of mitofusin 2 (Mfn2) for mitochondria remains largely unknown. In this study, the molecular mechanisms for the effect of Mfn2 on mitochondria and subsequent collagen IV expression in DN were investigated. Ras-binding-deficient mitofusin 2 (Mfn2-Ras(Δ)) were overexpressed in rat glomerular mesangial cells, and then the cells were detected for mitochondrial morphology, cellular reactive oxygen species (ROS), mRNA and protein expression of collagen IV with advanced glycation end-product (AGE) stimulation. Preliminary results reveal that the mitochondrial dysfunction and the increased synthesis of collagen IV after AGE stimulation were reverted by Mfn2-Ras(Δ) overexpression. Bioinformatical computations were performed to search transcriptional factor motifs in the promoter region of collagen IV. Three specific regions for TFAP2A binding were identified, followed by validation with chromatin immunoprecipitation experiments. Knocking down TFAP2A significantly decreased the TF binding in the first two regions and the gene expression of collagen IV. Furthermore, results reveal that Mfn2-Ras(Δ) overexpression significantly mitigated TFAP2A binding and also reverted the histone acetylation at Regions 1 and 2 after AGE stimulation. In streptozotocin-induced diabetic rats, Mfn2-Ras(Δ) overexpression also ameliorated glomerular mesangial lesions with decreased collagen IV expression, accompanied by decreased acetylation and TFAP2A binding at Region 1. In conclusion, this study highlights the pathway by which mitochondria affect the histone acetylation of gene promoter and provides a new potential therapy approach for DN.
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Affiliation(s)
- Xuhua Mi
- Division of NephrologyWest China Hospital, Sichuan University, Chengdu, China
| | - Wanxin Tang
- Division of NephrologyWest China Hospital, Sichuan University, Chengdu, China
| | - Xiaolei Chen
- Division of NephrologyWest China Hospital, Sichuan University, Chengdu, China
| | - Fei Liu
- Division of NephrologyWest China Hospital, Sichuan University, Chengdu, China
| | - Xiaohong Tang
- Division of NephrologyWest China Hospital, Sichuan University, Chengdu, China
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25
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Ackermann M, Liebhaber S, Klusmann JH, Lachmann N. Lost in translation: pluripotent stem cell-derived hematopoiesis. EMBO Mol Med 2016; 7:1388-402. [PMID: 26174486 PMCID: PMC4644373 DOI: 10.15252/emmm.201505301] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Pluripotent stem cells (PSCs) such as embryonic stem cells or induced pluripotent stem cells represent a promising cell type to gain novel insights into human biology. Understanding the differentiation process of PSCs in vitro may allow for the identification of cell extrinsic/intrinsic factors, driving the specification process toward all cell types of the three germ layers, which may be similar to the human in vivo scenario. This would not only lay the ground for an improved understanding of human embryonic development but would also contribute toward the generation of novel cell types used in cell replacement therapies. In this line, especially the developmental process of mesodermal cells toward the hematopoietic lineage is of great interest. Therefore, this review highlights recent progress in the field of hematopoietic specification of pluripotent stem cell sources. In addition, we would like to shed light on emerging factors controlling primitive and definitive hematopoietic development and to highlight recent approaches to improve the differentiation potential of PSC sources toward hematopoietic stem/progenitor cells. While the generation of fully defined hematopoietic stem cells from PSCs remains challenging in vitro, we here underline the instructive role of cell extrinsic factors such as cytokines for the generation of PSC-derived mature hematopoietic cells. Thus, we have comprehensively examined the role of cytokines for the derivation of mature hematopoietic cell types such as macrophages, granulocytes, megakaryocytes, erythrocytes, dendritic cells, and cells of the B- and T-cell lineage.
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Affiliation(s)
- Mania Ackermann
- RG Reprogramming and Gene Therapy, REBIRTH Cluster of Excellence Hannover Medical School, Hannover, Germany Institute of Experimental Hematology Hannover Medical School, Hannover, Germany
| | - Steffi Liebhaber
- RG Reprogramming and Gene Therapy, REBIRTH Cluster of Excellence Hannover Medical School, Hannover, Germany Institute of Experimental Hematology Hannover Medical School, Hannover, Germany
| | | | - Nico Lachmann
- RG Reprogramming and Gene Therapy, REBIRTH Cluster of Excellence Hannover Medical School, Hannover, Germany Institute of Experimental Hematology Hannover Medical School, Hannover, Germany JRG Translational Hematology of Congenital Diseases, REBIRTH Cluster of Excellence Hannover Medical School, Hannover, Germany
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26
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Hao Y, Wu W, Li H, Yuan J, Luo J, Zhao Y, Chen R. NPInter v3.0: an upgraded database of noncoding RNA-associated interactions. DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2016; 2016:baw057. [PMID: 27087310 PMCID: PMC4834207 DOI: 10.1093/database/baw057] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/20/2016] [Indexed: 02/01/2023]
Abstract
Despite the fact that a large quantity of noncoding RNAs (ncRNAs) have been identified, their functions remain unclear. To enable researchers to have a better understanding of ncRNAs’ functions, we updated the NPInter database to version 3.0, which contains experimentally verified interactions between ncRNAs (excluding tRNAs and rRNAs), especially long noncoding RNAs (lncRNAs) and other biomolecules (proteins, mRNAs, miRNAs and genomic DNAs). In NPInter v3.0, interactions pertaining to ncRNAs are not only manually curated from scientific literature but also curated from high-throughput technologies. In addition, we also curated lncRNA–miRNA interactions from in silico predictions supported by AGO CLIP-seq data. When compared with NPInter v2.0, the interactions are more informative (with additional information on tissues or cell lines, binding sites, conservation, co-expression values and other features) and more organized (with divisions on data sets by data sources, tissues or cell lines, experiments and other criteria). NPInter v3.0 expands the data set to 491,416 interactions in 188 tissues (or cell lines) from 68 kinds of experimental technologies. NPInter v3.0 also improves the user interface and adds new web services, including a local UCSC Genome Browser to visualize binding sites. Additionally, NPInter v3.0 defined a high-confidence set of interactions and predicted the functions of lncRNAs in human and mouse based on the interactions curated in the database. NPInter v3.0 is available at http://www.bioinfo.org/NPInter/. Database URL: http://www.bioinfo.org/NPInter/
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Affiliation(s)
- Yajing Hao
- Key Laboratory of RNA Biology Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Wu
- Key Laboratory of RNA Biology Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hui Li
- University of Chinese Academy of Sciences, Beijing, 100049, China Bioinformatics Research Group, Key Laboratory of Intelligent Information Processing, Advanced Computing Research Center, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jiao Yuan
- Key Laboratory of RNA Biology Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianjun Luo
- Key Laboratory of RNA Biology Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yi Zhao
- Bioinformatics Research Group, Key Laboratory of Intelligent Information Processing, Advanced Computing Research Center, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, China
| | - Runsheng Chen
- Key Laboratory of RNA Biology Beijing Key Laboratory of Noncoding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
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27
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Rezsohazy R, Saurin AJ, Maurel-Zaffran C, Graba Y. Cellular and molecular insights into Hox protein action. Development 2016; 142:1212-27. [PMID: 25804734 DOI: 10.1242/dev.109785] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hox genes encode homeodomain transcription factors that control morphogenesis and have established functions in development and evolution. Hox proteins have remained enigmatic with regard to the molecular mechanisms that endow them with specific and diverse functions, and to the cellular functions that they control. Here, we review recent examples of Hox-controlled cellular functions that highlight their versatile and highly context-dependent activity. This provides the setting to discuss how Hox proteins control morphogenesis and organogenesis. We then summarise the molecular modalities underlying Hox protein function, in particular in light of current models of transcription factor function. Finally, we discuss how functional divergence between Hox proteins might be achieved to give rise to the many facets of their action.
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Affiliation(s)
- René Rezsohazy
- Institut des Sciences de la Vie, Université Catholique de Louvain, Louvain-la-Neuve B-1348, Belgium
| | - Andrew J Saurin
- Aix Marseille Université, CNRS, IBDM, UMR 7288, Marseille 13288, Cedex 09, France
| | | | - Yacine Graba
- Aix Marseille Université, CNRS, IBDM, UMR 7288, Marseille 13288, Cedex 09, France
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28
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Fournier M, Lebert-Ghali CÉ, Bijl JJ. HOXA4 provides stronger engraftment potential to short-term repopulating cells than HOXB4. Stem Cells Dev 2015; 24:2413-22. [PMID: 26166023 DOI: 10.1089/scd.2015.0063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Genes of the HOX4 paralog group have been shown to expand hematopoietic stem cells (HSCs). Endogenous expression of HOXA4 is 10-fold higher than HOXB4 in embryonic primitive hematopoietic cells undergoing self-renewal suggesting a more potent capacity of HOXA4 to expand HSC. In this study, we provide evidence by direct competitive bone marrow cultures that HOXA4 and HOXB4 induce self-renewal of primitive hematopoietic cells with identical kinetics. Transplantation assays show that short-term repopulation by HOXA4-overexpressing multilineage progenitors was significantly greater than HOXB4-overexpressing progenitors in vivo, indicating differences in the sensitivity of the cells to external signals. Small array gene expression analysis showed an increase in multiple Notch and Wnt signaling -associated genes, including receptors and ligands, as well as pluripotency genes, for both HOXA4- and HOXB4-overexpressing cells, which was more pronounced for HOXA4, suggesting that both HOX proteins may assert their affects through intrinsic and extrinsic pathways to induce self-renewal of primitive hematopoietic cells. Thus, HOXA4 increases short-term repopulation to higher levels than HOXB4, which may involve Notch signaling.
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Affiliation(s)
- Marilaine Fournier
- 1 Centre de Recherche de l'Hôpital Maisonneuve-Rosemont , Montréal, Québec, Canada .,2 Départment de Microbiologie et Immunologie et, Université de Montréal , Montréal, Québec, Canada
| | - Charles-Étienne Lebert-Ghali
- 1 Centre de Recherche de l'Hôpital Maisonneuve-Rosemont , Montréal, Québec, Canada .,2 Départment de Microbiologie et Immunologie et, Université de Montréal , Montréal, Québec, Canada
| | - Janetta J Bijl
- 1 Centre de Recherche de l'Hôpital Maisonneuve-Rosemont , Montréal, Québec, Canada .,3 Départment de Médecine, Université de Montréal , Montréal, Québec, Canada
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29
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Kupsco A, Schlenk D. Oxidative stress, unfolded protein response, and apoptosis in developmental toxicity. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 317:1-66. [PMID: 26008783 DOI: 10.1016/bs.ircmb.2015.02.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Physiological development requires precise spatiotemporal regulation of cellular and molecular processes. Disruption of these key events can generate developmental toxicity in the form of teratogenesis or mortality. The mechanism behind many developmental toxicants remains unknown. While recent work has focused on the unfolded protein response (UPR), oxidative stress, and apoptosis in the pathogenesis of disease, few studies have addressed their relationship in developmental toxicity. Redox regulation, UPR, and apoptosis are essential for physiological development and can be disturbed by a variety of endogenous and exogenous toxicants to generate lethality and diverse malformations. This review examines the current knowledge of the role of oxidative stress, UPR, and apoptosis in physiological development as well as in developmental toxicity, focusing on studies and advances in vertebrates model systems.
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Affiliation(s)
- Allison Kupsco
- Environmental Toxicology Program, University of California, Riverside, CA, USA
| | - Daniel Schlenk
- Environmental Toxicology Program, University of California, Riverside, CA, USA; Environmental Sciences, University of California, Riverside, CA, USA
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30
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Moignard V, Woodhouse S, Haghverdi L, Lilly AJ, Tanaka Y, Wilkinson AC, Buettner F, Macaulay IC, Jawaid W, Diamanti E, Nishikawa SI, Piterman N, Kouskoff V, Theis FJ, Fisher J, Göttgens B. Decoding the regulatory network of early blood development from single-cell gene expression measurements. Nat Biotechnol 2015; 33:269-276. [PMID: 25664528 PMCID: PMC4374163 DOI: 10.1038/nbt.3154] [Citation(s) in RCA: 288] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 01/16/2015] [Indexed: 11/16/2022]
Abstract
Reconstruction of the molecular pathways controlling organ development has been hampered by a lack of methods to resolve embryonic progenitor cells. Here we describe a strategy to address this problem that combines gene expression profiling of large numbers of single cells with data analysis based on diffusion maps for dimensionality reduction and network synthesis from state transition graphs. Applying the approach to hematopoietic development in the mouse embryo, we map the progression of mesoderm toward blood using single-cell gene expression analysis of 3,934 cells with blood-forming potential captured at four time points between E7.0 and E8.5. Transitions between individual cellular states are then used as input to develop a single-cell network synthesis toolkit to generate a computationally executable transcriptional regulatory network model of blood development. Several model predictions concerning the roles of Sox and Hox factors are validated experimentally. Our results demonstrate that single-cell analysis of a developing organ coupled with computational approaches can reveal the transcriptional programs that underpin organogenesis.
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Affiliation(s)
- Victoria Moignard
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Steven Woodhouse
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Laleh Haghverdi
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Mathematics, Technische Universität München, Garching, Germany
| | - Andrew J. Lilly
- Cancer Research UK Stem Cell Haematopoiesis Group, Paterson Institute for Cancer Research, University of Manchester, Manchester, UK
| | - Yosuke Tanaka
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
- Laboratory for Stem Cell Biology, RIKEN Center for Developmental Biology, Chuo-ku, Kobe, Japan
| | - Adam C. Wilkinson
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Florian Buettner
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Iain C. Macaulay
- Sanger Institute-EBI Single Cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK
| | - Wajid Jawaid
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
| | - Evangelia Diamanti
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Shin-Ichi Nishikawa
- Laboratory for Stem Cell Biology, RIKEN Center for Developmental Biology, Chuo-ku, Kobe, Japan
| | - Nir Piterman
- Department of Computer Science, University of Leicester, Leicester, UK
| | - Valerie Kouskoff
- Cancer Research UK Stem Cell Haematopoiesis Group, Paterson Institute for Cancer Research, University of Manchester, Manchester, UK
| | - Fabian J. Theis
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Mathematics, Technische Universität München, Garching, Germany
| | - Jasmin Fisher
- Microsoft Research Cambridge, Cambridge, UK
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Berthold Göttgens
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, UK
- Wellcome Trust - Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
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31
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McAninch D, Thomas P. Identification of highly conserved putative developmental enhancers bound by SOX3 in neural progenitors using ChIP-Seq. PLoS One 2014; 9:e113361. [PMID: 25409526 PMCID: PMC4237438 DOI: 10.1371/journal.pone.0113361] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/22/2014] [Indexed: 11/29/2022] Open
Abstract
The transcription factor SOX3 is expressed within most neural progenitor (NP) cells of the vertebrate central nervous system (CNS) and is essential for normal brain development in mice and humans. However, despite the widespread expression of Sox3, CNS defects in null mice are relatively mild due to functional redundancy with the other SOXB1 sub-group members Sox1 and Sox2. To further understand the molecular function of SOX3, we investigated the genome-wide binding profile of endogenous SOX3 in NP cells using ChIP-seq. SOX3 binding was identified at over 8,000 sites, most of which were intronic or intergeneic and were significantly associated with neurodevelopmental genes. The majority of binding sites were moderately or highly conserved (phastCons scores >0.1 and 0.5, respectively) and included the previously characterised, SOXB1-binding Nestin NP cell enhancer. Comparison of SOX3 and published ChIP-Seq data for the co-activator P300 in embryonic brain identified hundreds of highly conserved putative enhancer elements. In addition, we identified a subset of highly conserved putative enhancers for CNS development genes common to SOXB1 members in NP cells, all of which contained the SOX consensus motif (ACAAWR). Together these data implicate SOX3 in the direct regulation of hundreds of NP genes and provide molecular insight into the overlapping roles of SOXB1 proteins in CNS development.
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Affiliation(s)
- Dale McAninch
- Department of Biochemistry, School of Molecular & Biomedical Science and Robinson Research Institute, The University of Adelaide, Adelaide, Australia
| | - Paul Thomas
- Department of Biochemistry, School of Molecular & Biomedical Science and Robinson Research Institute, The University of Adelaide, Adelaide, Australia
- * E-mail:
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32
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Shepard KA, Talib S. Bottlenecks in deriving definitive hematopoietic stem cells from human pluripotent stem cells: a CIRM mini-symposium and workshop report. Stem Cells Transl Med 2014; 3:775-81. [PMID: 24973044 DOI: 10.5966/sctm.2014-0104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
On August 29, 2013, the California Institute for Regenerative Medicine (CIRM) convened a small group of investigators in San Francisco, CA, to discuss a longstanding challenge in the stem cell field: the inability to derive fully functional, definitive hematopoietic stem cells (HSCs) from pluripotent stem cells (PSCs). To date, PSC-derived HSCs have been deficient in their developmental potential and their ability to self-renew and engraft upon transplantation. Tasked with identifying key challenges to overcoming this "HSC bottleneck", workshop participants identified critical knowledge gaps in two key areas: (a) understanding the ontogeny of human HSCs, and (b) understanding of the intrinsic and extrinsic factors that govern HSC behavior and function. They agreed that development of new methods and tools is critical for addressing these knowledge gaps. These include molecular profiling of key HSC properties, development of new model systems/assays for predicting and assessing HSC function, and novel technological advancements for manipulating cell culture conditions and genetic programs. The workshop produced tangible advances, including providing a current definition of the nature and challenge of the HSC bottleneck and identifying key mechanistic studies of HSC biology that should be prioritized for future funding initiatives (e.g., including higher risk approaches that have potential for high gain).
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Affiliation(s)
- Kelly A Shepard
- California Institute for Regenerative Medicine, San Francisco, California, USA
| | - Sohel Talib
- California Institute for Regenerative Medicine, San Francisco, California, USA
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33
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Downregulation of Prdm16 mRNA is a specific antileukemic mechanism during HOXB4-mediated HSC expansion in vivo. Blood 2014; 124:1737-47. [PMID: 25082879 DOI: 10.1182/blood-2013-10-534735] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Overexpression of HOXB4 in hematopoietic stem cells (HSCs) leads to increased self-renewal without causing hematopoietic malignancies in transplanted mice. The molecular basis of HOXB4-mediated benign HSC expansion in vivo is not well understood. To gain further insight into the molecular events underlying HOXB4-mediated HSC expansion, we analyzed gene expression changes at multiple time points in Lin(-)Sca1(+)c-kit(+) cells from mice transplanted with bone marrow cells transduced with a MSCV-HOXB4-ires-YFP vector. A distinct HOXB4 transcriptional program was reproducibly induced and stabilized by 12 weeks after transplant. Dynamic expression changes were observed in genes critical for HSC self-renewal as well as in genes involved in myeloid and B-cell differentiation. Prdm16, a transcription factor associated with human acute myeloid leukemia, was markedly repressed by HOXB4 but upregulated by HOXA9 and HOXA10, suggesting that Prdm16 downregulation was involved in preventing leukemia in HOXB4 transplanted mice. Functional evidence to support this mechanism was obtained by enforcing coexpression of sPrdm16 and HOXB4, which led to enhanced self-renewal, myeloid expansion, and leukemia. Altogether, these studies define the transcriptional pathways involved in HOXB4 HSC expansion in vivo and identify repression of Prdm16 transcription as a mechanism by which expanding HSCs avoid leukemic transformation.
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Duan L, Wang Z, Shen J, Shan Z, Shen X, Wu Y, Sun R, Li T, Yuan R, Zhao Q, Bai G, Gu Y, Jin L, Lei L. Comparison of reprogramming genes in induced pluripotent stem cells and nuclear transfer cloned embryos. Stem Cell Rev Rep 2014; 10:548-60. [PMID: 24828831 DOI: 10.1007/s12015-014-9516-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The most effective reprogramming methods, somatic cell nuclear transfer (SCNT) and induced pluripotent stem cells (iPSCs), are widely used in biological research and regenerative medicine, yet the mechanism that reprograms somatic cells to totipotency remains unclear and thus reprogramming efficiency is still low. Microarray technology has been employed in analyzing the transcriptomes changes during iPS reprogramming. Unfortunately, it is difficult to obtain enough DNA from SCNT reconstructed embryos to take advantage of this technology. In this study, we aimed to identify critical genes from the transcriptional profile for iPS reprogramming and compared expression levels of these genes in SCNT reprogramming. By integrating gene expression information from microarray databases and published studies comparing somatic cells with either miPSCs or mouse embryonic stem cells (ESCs), we obtained two lists of co-upregulated genes. The gene ontology (GO) enriched analysis of these two lists demonstrated that the reprogramming process is associated with numerous biological processes. Specifically, we selected 32 genes related to heterochromatin, embryonic development, and cell cycle from our co-upregulated gene datasets and examined the gene expression level in iPSCs and SCNT embryos by qPCR. The results revealed that some reprogramming related genes in iPSCs were also expressed in SCNT reprogramming. We established the network of gene interactions that occur with genes differentially expressed in iPS and SCNT reprogramming and then performed GO analysis on the genes in the network. The network genes function in chromatin organization, heterochromatin, transcriptional regulation, and cell cycle. Further researches to improve reprogramming efficiency, especially in SCNT, will focus on functional studies of these selected genes.
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Affiliation(s)
- Lian Duan
- Department of Histology and Embryology, Harbin Medical University, 194 Xuefu Road, Harbin, China
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Abstract
ChIP-seq has become the primary method for identifying in vivo protein-DNA interactions on a genome-wide scale, with nearly 800 publications involving the technique appearing in PubMed as of December 2012. Individually and in aggregate, these data are an important and information-rich resource. However, uncertainties about data quality confound their use by the wider research community. Recently, the Encyclopedia of DNA Elements (ENCODE) project developed and applied metrics to objectively measure ChIP-seq data quality. The ENCODE quality analysis was useful for flagging datasets for closer inspection, eliminating or replacing poor data, and for driving changes in experimental pipelines. There had been no similarly systematic quality analysis of the large and disparate body of published ChIP-seq profiles. Here, we report a uniform analysis of vertebrate transcription factor ChIP-seq datasets in the Gene Expression Omnibus (GEO) repository as of April 1, 2012. The majority (55%) of datasets scored as being highly successful, but a substantial minority (20%) were of apparently poor quality, and another ∼25% were of intermediate quality. We discuss how different uses of ChIP-seq data are affected by specific aspects of data quality, and we highlight exceptional instances for which the metric values should not be taken at face value. Unexpectedly, we discovered that a significant subset of control datasets (i.e., no immunoprecipitation and mock immunoprecipitation samples) display an enrichment structure similar to successful ChIP-seq data. This can, in turn, affect peak calling and data interpretation. Published datasets identified here as high-quality comprise a large group that users can draw on for large-scale integrated analysis. In the future, ChIP-seq quality assessment similar to that used here could guide experimentalists at early stages in a study, provide useful input in the publication process, and be used to stratify ChIP-seq data for different community-wide uses.
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Webber BR, Iacovino M, Choi SH, Tolar J, Kyba M, Blazar BR. DNA methylation of Runx1 regulatory regions correlates with transition from primitive to definitive hematopoietic potential in vitro and in vivo. Blood 2013; 122:2978-86. [PMID: 24030384 PMCID: PMC3811172 DOI: 10.1182/blood-2013-03-489369] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 09/03/2013] [Indexed: 12/11/2022] Open
Abstract
The transcription factor Runx1 (AML1) is a central regulator of hematopoiesis and is required for the formation of definitive hematopoietic stem cells (HSCs). Runx1 is alternatively expressed from two promoters: the proximal (P2) prevails during primitive hematopoiesis, while the distal (P1) dominates in definitive HSCs. Although some transcription factor binding sites and cis-regulatory elements have been identified, a mechanistic explanation for the alternative promoter usage remains elusive. We investigated DNA methylation of known Runx1 cis-elements at stages of hematopoietic development in vivo and during differentiation of murine embryonic stem cells (ESCs) in vitro. In vivo, we find loss of methylation correlated with the primitive to definitive transition at the P1 promoter. In vitro, hypomethylation, acquisition of active chromatin modifications, and increased transcriptional activity at P1 are promoted by direct interaction with HOXB4, a transcription factor that confers definitive repopulation status on primitive hematopoietic progenitors. These data demonstrate a novel role for DNA methylation in the alternative promoter usage at the Runx1 locus and identify HOXB4 as a direct activator of the P1 promoter. This epigenetic signature should serve as a novel biomarker of HSC potential in vivo, and during ESC differentiation in vitro.
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Affiliation(s)
- Beau R Webber
- Division of Hematology-Oncology, Blood and Marrow Transplantation, and
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RUNX1a enhances hematopoietic lineage commitment from human embryonic stem cells and inducible pluripotent stem cells. Blood 2013; 121:2882-90. [PMID: 23372166 DOI: 10.1182/blood-2012-08-451641] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Advancements in human pluripotent stem cell (hPSC) research have potential to revolutionize therapeutic transplantation. It has been demonstrated that transcription factors may play key roles in regulating maintenance, expansion, and differentiation of hPSCs. In addition to its regulatory functions in hematopoiesis and blood-related disorders, the transcription factor RUNX1 is also required for the formation of definitive blood stem cells. In this study, we demonstrated that expression of endogenous RUNX1a, an isoform of RUNX1, parallels with lineage commitment and hematopoietic emergence from hPSCs, including both human embryonic stem cells and inducible pluripotent stem cells. In a defined hematopoietic differentiation system, ectopic expression of RUNX1a facilitates emergence of hematopoietic progenitor cells (HPCs) and positively regulates expression of mesoderm and hematopoietic differentiation-related factors, including Brachyury, KDR, SCL, GATA2, and PU.1. HPCs derived from RUNX1a hPSCs show enhanced expansion ability, and the ex vivo-expanded cells are capable of differentiating into multiple lineages. Expression of RUNX1a in embryoid bodies (EBs) promotes definitive hematopoiesis that generates erythrocytes with β-globin production. Moreover, HPCs generated from RUNX1a EBs possess ≥9-week repopulation ability and show multilineage hematopoietic reconstitution in vivo. Together, our results suggest that RUNX1a facilitates the process of producing therapeutic HPCs from hPSCs.
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38
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Abstract
The homeobox (HOX) genes are a highly conserved family of homeodomain-containing transcription factors that specify cell identity in early development and, subsequently, in a number of adult processes including hematopoiesis. The dysregulation of HOX genes is associated with a number of malignancies including acute myeloid leukemia (AML) and acute lymphoid leukemia (ALL), where they have been shown to support the immortalization of leukemic cells both as chimeric partners in fusion genes and when overexpressed in their wild-type form. This review covers our current understanding of the role of HOX genes in normal hematopoiesis, AML and ALL, with particular emphasis on the similarities and differences of HOX function in these contexts, their hematopoietic downstream gene targets and implications for therapy.
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Fujiwara T, Yokoyama H, Okitsu Y, Kamata M, Fukuhara N, Onishi Y, Fujimaki S, Takahashi S, Ishizawa K, Bresnick EH, Harigae H. Gene expression profiling identifies HOXB4 as a direct downstream target of GATA-2 in human CD34+ hematopoietic cells. PLoS One 2012; 7:e40959. [PMID: 23028422 PMCID: PMC3454409 DOI: 10.1371/journal.pone.0040959] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/15/2012] [Indexed: 12/31/2022] Open
Abstract
Aplastic anemia is characterized by a reduced hematopoietic stem cell number. Although GATA-2 expression was reported to be decreased in CD34-positive cells in aplastic anemia, many questions remain regarding the intrinsic characteristics of hematopoietic stem cells in this disease. In this study, we identified HOXB4 as a downstream target of GATA-2 based on expression profiling with human cord blood-derived CD34-positive cells infected with control or GATA-2 lentiviral shRNA. To confirm the functional link between GATA-2 and HOXB4, we conducted GATA-2 gain-of-function and loss-of-function experiments, and HOXB4 promoter analysis, including luciferase assay, in vitro DNA binding analysis and quantitative ChIP analysis, using K562 and CD34-positive cells. The analyses suggested that GATA-2 directly regulates HOXB4 expression through the GATA sequence in the promoter region. Furthermore, we assessed GATA-2 and HOXB4 expression in CD34-positive cells from patients with aplastic anemia (n = 10) and idiopathic thrombocytopenic purpura (n = 13), and demonstrated that the expression levels of HOXB4 and GATA-2 were correlated in these populations (r = 0.6573, p<0.01). Our results suggested that GATA-2 directly regulates HOXB4 expression in hematopoietic stem cells, which may play an important role in the development and/or progression of aplastic anemia.
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Affiliation(s)
- Tohru Fujiwara
- Molecular Hematology/Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hisayuki Yokoyama
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Hematology, Sendai Medical Center, Sendai, Japan
| | - Yoko Okitsu
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mayumi Kamata
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Noriko Fukuhara
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasushi Onishi
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichi Fujimaki
- Infection Control and Laboratory Diagnosis, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichiro Takahashi
- Division of Hematology, Kitasato University School of Allied Health Sciences, Sagamihara, Japan
| | - Kenichi Ishizawa
- Molecular Hematology/Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Emery H. Bresnick
- Department of Cell and Regenerative Biology, Wisconsin Institutes for Medical Research, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Hideo Harigae
- Molecular Hematology/Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
- Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
- * E-mail:
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Lesinski DA, Heinz N, Pilat-Carotta S, Rudolph C, Jacobs R, Schlegelberger B, Klump H, Schiedlmeier B. Serum- and stromal cell-free hypoxic generation of embryonic stem cell-derived hematopoietic cells in vitro, capable of multilineage repopulation of immunocompetent mice. Stem Cells Transl Med 2012. [PMID: 23197864 DOI: 10.5966/sctm.2012-0020] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Induced pluripotent stem cells (iPSCs) may become a promising source for the generation of patient-specific hematopoietic stem cells (HSCs) in vitro. A crucial prerequisite will be the availability of reliable protocols for the directed and efficient differentiation toward HSCs. So far, the most robust strategy for generating HSCs from pluripotent cells in vitro has been established in the mouse model involving ectopic expression of the human transcription factor HOXB4. However, most differentiation protocols include coculture on a xenogenic stroma cell line and the use of animal serum. Involvement of any of both would pose a major barrier to the translation of those protocols to human autologous iPSCs intended for clinical use. Therefore, we asked whether long-term repopulating HSCs can, in principle, be generated from embryonic stem cells without stroma cells or serum. Here, we showed that long-term multilineage engraftment could be accomplished in immunocompetent mice when HSCs were generated in serum-free medium without stroma cell support and when hypoxic conditions were used. Under those conditions, HOXB4(+) embryonic stem cell-derived hematopoietic stem and progenitor cells were immunophenotypically similar to definitive bone marrow resident E-SLAM(+) (CD150(+)CD48(-)CD45(+)CD201(+)) HSCs. Thus, our findings may ease the development of definitive, adult-type HSCs from pluripotent stem cells, entirely in vitro.
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Affiliation(s)
- Dietrich Armin Lesinski
- Institute of Experimental Hematology, The Walter and Eliza Hall Institute for Medical Research, Parkville, Victoria, Australia
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