1
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Psutkova V, Nickl P, Brezinova V, Machonova O, Machon O. Transcription factor Meis1b regulates craniofacial morphogenesis in zebrafish. Dev Dyn 2024. [PMID: 39087648 DOI: 10.1002/dvdy.731] [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: 01/09/2024] [Revised: 06/28/2024] [Accepted: 07/17/2024] [Indexed: 08/02/2024] Open
Abstract
BACKGROUND Meis family of transcription factors operates in Pbx-Meis-Hox regulatory network controlling development of various tissues including eye, limbs, heart, hindbrain or craniofacial skeletal elements originating from the neural crest. Although studies in mouse provide abundant information about Meis factors function in embryogenesis, little is known about their role in zebrafish. RESULTS We generated zebrafish lines carrying null mutations in meis1a, meis1b, meis2a, and meis2b genes. Only meis1b mutants are lethal at larval stage around 13 dpf whereas the other mutant lines are viable and fertile. We focused on development of neural crest-derived craniofacial structures such as tendons, cranial nerves, cartilage and accompanying muscles. Meis1b mutants displayed morphogenetic abnormalities in the cartilage originating from the first and second pharyngeal arches. Meckel's cartilage was shorter and wider with fused anterior symphysis and abnormal chondrocyte organization. This resulted in impaired tendons and muscle fiber connections while tenocyte development was not largely affected. CONCLUSIONS Loss-of-function mutation in meis1b affects cartilage morphology in the lower jaw that leads to disrupted organization of muscles and tendons.
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Affiliation(s)
- Viktorie Psutkova
- Department of Developmental Biology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Petr Nickl
- Department of Developmental Biology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Veronika Brezinova
- Department of Developmental Biology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Machonova
- Laboratory of Cell Differentiation, Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Ondrej Machon
- Department of Developmental Biology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
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2
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Kitagawa Y, Ikenaka A, Sugimura R, Niwa A, Saito MK. ZEB2 and MEIS1 independently contribute to hematopoiesis via early hematopoietic enhancer activation. iScience 2023; 26:107893. [PMID: 37771659 PMCID: PMC10522983 DOI: 10.1016/j.isci.2023.107893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 07/15/2023] [Accepted: 09/08/2023] [Indexed: 09/30/2023] Open
Abstract
Cell differentiation is achieved by acquiring a cell type-specific transcriptional program and epigenetic landscape. While the cell type-specific patterning of enhancers has been shown to precede cell fate decisions, it remains unclear how regulators of these enhancers are induced to initiate cell specification and how they appropriately restrict cells that differentiate. Here, using embryonic stem cell-derived hematopoietic cell differentiation cultures, we show the activation of some hematopoietic enhancers during arterialization of hemogenic endothelium, a prerequisite for hematopoiesis. We further reveal that ZEB2, a factor involved in the transcriptional regulation of arterial endothelial cells, and a hematopoietic regulator MEIS1 are independently required for activating these enhancers. Concomitantly, ZEB2 or MEIS1 deficiency impaired hematopoietic cell development. These results suggest that multiple regulators expressed from an earlier developmental stage non-redundantly contribute to the establishment of hematopoietic enhancer landscape, thereby restricting cell differentiation despite the unrestricted expression of these regulators to hematopoietic cells.
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Affiliation(s)
- Yohko Kitagawa
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Akihiro Ikenaka
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Ryohichi Sugimura
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Akira Niwa
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Megumu K. Saito
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
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3
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Wang W, Li H, Huang M, Wang X, Li W, Qian X, Jing L. Hoxa9/ meis1-transgenic zebrafish develops acute myeloid leukaemia-like disease with rapid onset and high penetrance. Open Biol 2022; 12:220172. [PMID: 36285442 PMCID: PMC9597180 DOI: 10.1098/rsob.220172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
HOXA9 and MEIS1 are co-expressed in over 50% of acute myeloid leukaemia (AML) and play essential roles in leukaemogenesis, but the mechanisms involved are poorly understood. Diverse animal models offer valuable tools to recapitulate different aspects of AML and link in vitro studies to clinical trials. We generated a double transgenic zebrafish that enables hoxa9 overexpression in blood cells under the draculin (drl) regulatory element and an inducible expression of meis1 through a heat shock promoter. After induction, Tg(drl:hoxa9;hsp70:meis1) embryos developed a preleukaemic state with reduced myeloid and erythroid differentiation coupled with the poor production of haematopoietic stem cells and myeloid progenitors. Importantly, most adult Tg(drl:hoxa9;hsp70:meis1) fish at 3 months old showed abundant accumulations of immature myeloid precursors, interrupted differentiation and anaemia in the kidney marrow, and infiltration of myeloid precursors in peripheral blood, resembling human AML. Genome-wide transcriptional analysis also confirmed AML transformation by the transgene. Moreover, the dihydroorotate dehydrogenase (DHODH) inhibitor that reduces leukaemogenesis in mammals effectively restored haematopoiesis in Tg(drl:hoxa9;hsp70:meis1) embryos and improved their late survival. Thus, Tg(drl:hoxa9;hsp70:meis1) zebrafish is a rapid-onset high-penetrance AML-like disease model, which provides a novel tool to harness the unique advantages of zebrafish for mechanistic studies and drug screening against HOXA9/MEIS1 overexpressed high-risk AML.
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Affiliation(s)
- Wei Wang
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Hongji Li
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Mengling Huang
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Xue Wang
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Wei Li
- Core facility and technical service center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Xiaoqing Qian
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Lili Jing
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, Pharm-X Center, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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4
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Steinberg-Shemer O, Orenstein N, Krasnov T, Noy-Lotan S, Marcoux N, Dgany O, Yacobovich J, Gilad O, Shabad E, Basel-Salmon L, Tamary H. Congenital Thrombocytopenia Associated with a Heterozygous Variant in the MEIS1 Gene Encoding a Transcription Factor Essential for Megakaryopoiesis. Platelets 2022; 33:645-648. [PMID: 35130804 DOI: 10.1080/09537104.2021.1961704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The transcription factor MEIS1 (myeloid ectotrophic insertion site 1) is crucial for the maintenance of hematopoietic stem cells and for megakaryopoiesis. Germline variants in MEIS1 are associated with restless-leg syndrome, but were not previously shown to cause cytopenias. This is the first report of a patient with congenital thrombocytopenia associated with a sequence variant in MEIS1, presenting with early onset severe thrombocytopenia and mild signs of bone marrow stress. Whole exome sequencing revealed a de novo monoallelic splice site variant in MEIS1, NM_002398.3:exon4:c.432 + 5 G > C, leading to a premature stop codon. We propose that heterozygous mutations in MEIS1 may cause congenital thrombocytopenia.
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Affiliation(s)
- Orna Steinberg-Shemer
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel.,Department of Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Naama Orenstein
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetic Clinic, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - Tanya Krasnov
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel
| | - Sharon Noy-Lotan
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel
| | - Nathaly Marcoux
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel
| | - Orly Dgany
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel
| | - Joanne Yacobovich
- Department of Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Oded Gilad
- Department of Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Lina Basel-Salmon
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Recanati Genetics Institute, Rabin Medical Center, Petach Tikva, Israel
| | - Hannah Tamary
- Pediatric Hematology Laboratory, Felsenstein Medical Research Center, Sackler School of Medicine, Tel-Aviv University, Petach Tikva, Israel.,Department of Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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5
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A cell atlas of microbe-responsive processes in the zebrafish intestine. Cell Rep 2022; 38:110311. [PMID: 35108531 DOI: 10.1016/j.celrep.2022.110311] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 10/28/2021] [Accepted: 01/07/2022] [Indexed: 02/08/2023] Open
Abstract
Gut microbial products direct growth, differentiation, and development in animal hosts. However, we lack system-wide understanding of cell-specific responses to the microbiome. We profiled cell transcriptomes from the intestine, and associated tissue, of zebrafish larvae raised in the presence or absence of a microbiome. We uncovered extensive cellular heterogeneity in the conventional zebrafish intestinal epithelium, including previously undescribed cell types with known mammalian homologs. By comparing conventional to germ-free profiles, we mapped microbial impacts on transcriptional activity in each cell population. We revealed intricate degrees of cellular specificity in host responses to the microbiome that included regulatory effects on patterning and on metabolic and immune activity. For example, we showed that the absence of microbes hindered pro-angiogenic signals in the developing vasculature, causing impaired intestinal vascularization. Our work provides a high-resolution atlas of intestinal cellular composition in the developing fish gut and details the effects of the microbiome on each cell type.
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6
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Blasi F, Bruckmann C. MEIS1 in Hematopoiesis and Cancer. How MEIS1-PBX Interaction Can Be Used in Therapy. J Dev Biol 2021; 9:jdb9040044. [PMID: 34698191 PMCID: PMC8544432 DOI: 10.3390/jdb9040044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/04/2021] [Accepted: 10/05/2021] [Indexed: 11/26/2022] Open
Abstract
Recently MEIS1 emerged as a major determinant of the MLL-r leukemic phenotype. The latest and most efficient drugs effectively decrease the levels of MEIS1 in cancer cells. Together with an overview of the latest drugs developed to target MEIS1 in MLL-r leukemia, we review, in detail, the role of MEIS1 in embryonic and adult hematopoiesis and suggest how a more profound knowledge of MEIS1 biochemistry can be used to design potent and effective drugs against MLL-r leukemia. In addition, we present data showing that the interaction between MEIS1 and PBX1 can be blocked efficiently and might represent a new avenue in anti-MLL-r and anti-leukemic therapy.
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7
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Chung HY, Lin BA, Lin YX, Chang CW, Tzou WS, Pei TW, Hu CH. Meis1, Hi1α, and GATA1 are integrated into a hierarchical regulatory network to mediate primitive erythropoiesis. FASEB J 2021; 35:e21915. [PMID: 34496088 DOI: 10.1096/fj.202001044rrr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/20/2021] [Accepted: 08/27/2021] [Indexed: 12/16/2022]
Abstract
During development, erythroid cells are generated by two waves of hematopoiesis. In zebrafish, primitive erythropoiesis takes place in the intermediate cell mass region, and definitive erythropoiesis arises from the aorta-gonad mesonephros. TALE-homeoproteins Meis1 and Pbx1 function upstream of GATA1 to specify the erythroid lineage. Embryos lacking Meis1 or Pbx1 have weak gata1 expression and fail to produce primitive erythrocytes. Nevertheless, the underlying mechanism of how Meis1 and Pbx1 mediate gata1 transcription in erythrocytes remains unclear. Here we show that Hif1α acts downstream of Meis1 to mediate gata1 expression in zebrafish embryos. Inhibition of Meis1 expression resulted in suppression of hif1a expression and abrogated primitive erythropoiesis, while injection with in vitro-synthesized hif1α mRNA rescued gata1 transcription in Meis1 morphants and recovered their erythropoiesis. Ablation of Hif1α expression either by morpholino knockdown or Crispr-Cas9 knockout suppressed gata1 transcription and abrogated primitive erythropoiesis. Results of chromatin immunoprecipitation assays showed that Hif1α associates with hypoxia-response elements located in the 3'-flanking region of gata1 during development, suggesting that Hif1α regulates gata1 expression in vivo. Together, our results indicate that Meis1, Hif1α, and GATA1 indeed comprise a hierarchical regulatory network in which Hif1α acts downstream of Meis1 to activate gata1 transcription through direct interactions with its cis-acting elements in primitive erythrocytes.
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Affiliation(s)
- Hsin-Yu Chung
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Bo-An Lin
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Yi-Xuan Lin
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Chen-Wei Chang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Wen-Shyong Tzou
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan.,Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Tun-Wen Pei
- Department of Computer Science and Information Engineering, National Taipei University of Technology
| | - Chin-Hwa Hu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan.,Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
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8
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Jiang M, Xu S, Bai M, Zhang A. The emerging role of MEIS1 in cell proliferation and differentiation. Am J Physiol Cell Physiol 2020; 320:C264-C269. [PMID: 33296285 DOI: 10.1152/ajpcell.00422.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cell proliferation and differentiation are the foundation of reproduction and growth. Mistakes in these processes may affect cell survival, or cause cell cycle dysregulation, such as tumorigenesis, birth defects and degenerative diseases, or cell death. Myeloid ecotropic viral integration site 1 (MEIS1) was initially discovered in leukemic mice. Recent research identified MEIS1 as an important transcription factor that regulates cell proliferation and differentiation during cell fate commitment. MEIS1 has a pro-proliferative effect in leukemia cells; however, its overexpression in cardiomyocytes restrains neonatal and adult cardiomyocyte proliferation. In addition, MEIS1 has carcinogenic or tumor suppressive effects in different neoplasms. Thus, this uncertainty suggests that MEIS1 has a unique function in cell proliferation and differentiation. In this review, we summarize the primary findings of MEIS1 in regulating cell proliferation and differentiation. Correlations between MEIS1 and cell fate specification might suggest MEIS1 as a therapeutic target for diseases.
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Affiliation(s)
- Mingzhu Jiang
- Department of Nephrology, State Key Laboratory of Reproductive Medicine, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, People's Republic of China
| | - Shuang Xu
- Department of Nephrology, State Key Laboratory of Reproductive Medicine, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, People's Republic of China
| | - Mi Bai
- Department of Nephrology, State Key Laboratory of Reproductive Medicine, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, People's Republic of China.,Nanjing Key Lab of Pediatrics, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Aihua Zhang
- Department of Nephrology, State Key Laboratory of Reproductive Medicine, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, People's Republic of China.,Nanjing Key Lab of Pediatrics, Children's Hospital of Nanjing Medical University, Nanjing, People's Republic of China
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9
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Zhang C, Featherstone M. A zebrafish hox gene acts before gastrulation to specify the hemangioblast. Genesis 2020; 58:e23363. [PMID: 32302038 DOI: 10.1002/dvg.23363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/09/2020] [Accepted: 03/24/2020] [Indexed: 11/10/2022]
Abstract
Hox genes encode transcription factors that have been implicated in embryonic, adult and disease processes. The earliest developmental program known to be directed by Hox genes is the timing of ingression of presumptive axial mesoderm during gastrulation. We previously used morpholino (MO)-based knockdown to implicate the zebrafish hoxd4a gene in the specification of the hemangioblast, an event occurring at pre-gastrulation stages, well before the earliest known Hox gene function. The precise time at which hoxd4a function is required for this specification is not defined. We therefore fused the hoxd4a coding region to the human estrogen receptor (hERT2 ). Following co-injection of anti-hoxd4a MO with mRNA encoding the Hoxd4a-ERT2 fusion protein, hemangioblast specification was fully rescued when embryos were exposed to the estrogen analog 4-hydroxy-tamoxifen (4-OHT) at 4 hr post-fertilization (hpf), but only poorly at 6 hpf and not at all at 8 hpf, thereby defining a pre-gastrulation role for Hoxd4a, the earliest developmental function of a vertebrate Hox gene so far described. Both DNA binding and interaction with cofactor Pbx were further shown to be required for rescue of the morphant phenotype. Confirmation of the morphant phenotype was sought via the generation of hoxd4a null mutants using CRISPR/Cas9 technology. Null mutants of hoxd4a up to the third generation (F3 ) failed to recapitulate the morphant phenotype, and were largely refractory to the effects of injected anti-hoxd4a MO suggesting the action of genetic compensation.
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Affiliation(s)
- Changqing Zhang
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Mark Featherstone
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
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10
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Paul S, Zhang X, He JQ. Homeobox gene Meis1 modulates cardiovascular regeneration. Semin Cell Dev Biol 2019; 100:52-61. [PMID: 31623926 DOI: 10.1016/j.semcdb.2019.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/30/2019] [Accepted: 10/04/2019] [Indexed: 12/20/2022]
Abstract
Regeneration of cardiomyocytes, endothelial cells and vascular smooth muscle cells (three major lineages of cardiac tissues) following myocardial infarction is the critical step to recover the function of the damaged heart. Myeloid ecotropic viral integration site 1 (Meis1) was first discovered in leukemic mice in 1995 and its biological function has been extensively studied in leukemia, hematopoiesis, the embryonic pattering of body axis, eye development and various genetic diseases, such as restless leg syndrome. It was found that Meis1 is highly associated with Hox genes and their cofactors to exert its regulatory effects on multiple intracellular signaling pathways. Recently with the advent of bioinformatics, biochemical methods and advanced genetic engineering tools, new function of Meis1 has been found to be involved in the cell cycle regulation of cardiomyocytes and endothelial cells. For example, inhibition of Meis1 expression increases the proliferative capacity of neonatal mouse cardiomyocytes, whereas overexpression of Meis1 results in the reduction in the length of cardiomyocyte proliferative window. Interestingly, downregulation of one of the circular RNAs, which acts downstream of Meis1 in the cardiomyocytes, promotes angiogenesis and restores the myocardial blood supply, thus reinforcing better regeneration of the damaged heart. It appears that Meis1 may play double roles in modulating proliferation and regeneration of cardiomyocytes and endothelial cells post-myocardial infarction. In this review, we propose to summarize the major findings of Meis1 in modulating fetal development and adult abnormalities, especially focusing on the recent discoveries of Meis1 in controlling the fate of cardiomyocytes and endothelial cells.
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Affiliation(s)
- Swagatika Paul
- Department of Biomedical Sciences & Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xiaonan Zhang
- Beijing Yulong Shengshi Biotechnology, Haidian District, Beijing, 100085, China
| | - Jia-Qiang He
- Department of Biomedical Sciences & Pathobiology, College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061, USA.
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11
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Schulte D, Geerts D. MEIS transcription factors in development and disease. Development 2019; 146:146/16/dev174706. [PMID: 31416930 DOI: 10.1242/dev.174706] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 06/28/2019] [Indexed: 12/12/2022]
Abstract
MEIS transcription factors are key regulators of embryonic development and cancer. Research on MEIS genes in the embryo and in stem cell systems has revealed novel and surprising mechanisms by which these proteins control gene expression. This Primer summarizes recent findings about MEIS protein activity and regulation in development, and discusses new insights into the role of MEIS genes in disease, focusing on the pathogenesis of solid cancers.
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Affiliation(s)
- Dorothea Schulte
- Institute of Neurology (Edinger Institute), University Hospital Frankfurt, Goethe University, 60528 Frankfurt, Germany
| | - Dirk Geerts
- Department of Medical Biology L2-109, Amsterdam University Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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12
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Mazzola M, Deflorian G, Pezzotta A, Ferrari L, Fazio G, Bresciani E, Saitta C, Ferrari L, Fumagalli M, Parma M, Marasca F, Bodega B, Riva P, Cotelli F, Biondi A, Marozzi A, Cazzaniga G, Pistocchi A. NIPBL: a new player in myeloid cell differentiation. Haematologica 2019; 104:1332-1341. [PMID: 30630974 PMCID: PMC6601076 DOI: 10.3324/haematol.2018.200899] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 01/03/2019] [Indexed: 12/19/2022] Open
Abstract
The nucleophosmin 1 gene (NPM1) is the most frequently mutated gene in acute myeloid leukemia. Notably, NPM1 mutations are always accompanied by additional mutations such as those in cohesin genes RAD21, SMC1A, SMC3, and STAG2 but not in the cohesin regulator, nipped B-like (NIPBL). In this work, we analyzed a cohort of adult patients with acute myeloid leukemia and NPM1 mutation and observed a specific reduction in the expression of NIPBL but not in other cohesin genes. In our zebrafish model, overexpression of the mutated form of NPM1 also induced downregulation of nipblb, the zebrafish ortholog of human NIPBL To investigate the hematopoietic phenotype and the interaction between mutated NPM1 and nipblb, we generated a zebrafish model with nipblb downregulation which showed an increased number of myeloid progenitors. This phenotype was due to hyper-activation of the canonical Wnt pathway: myeloid cells blocked in an undifferentiated state could be rescued when the Wnt pathway was inhibited by dkk1b mRNA injection or indomethacin administration. Our results reveal, for the first time, a role for NIPBL during zebrafish hematopoiesis and suggest that an interplay between NIPBL/NPM1 may regulate myeloid differentiation in zebrafish and humans through the canonical Wnt pathway and that dysregulation of these interactions may drive leukemic transformation.
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MESH Headings
- Adult
- Animals
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism
- Cell Differentiation
- Chromosomal Proteins, Non-Histone/genetics
- Chromosomal Proteins, Non-Histone/metabolism
- Embryo, Nonmammalian/metabolism
- Embryo, Nonmammalian/pathology
- Gene Expression Regulation, Neoplastic
- Hematopoiesis
- Humans
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Mutation
- Nuclear Proteins/genetics
- Nucleophosmin
- Phenotype
- Wnt Signaling Pathway
- Zebrafish
- Cohesins
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Affiliation(s)
- Mara Mazzola
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
| | | | - Alex Pezzotta
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
| | - Laura Ferrari
- Istituto FIRC di Oncologia Molecolare, IFOM, Milano, Italy
| | - Grazia Fazio
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Erica Bresciani
- Oncogenesis and Development Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Claudia Saitta
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Luca Ferrari
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
| | - Monica Fumagalli
- Clinica Ematologica e Centro Trapianti di Midollo Osseo, Ospedale San Gerardo, Università di Milano-Bicocca, Monza, Italy
| | - Matteo Parma
- Clinica Ematologica e Centro Trapianti di Midollo Osseo, Ospedale San Gerardo, Università di Milano-Bicocca, Monza, Italy
| | - Federica Marasca
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi" (INGM), Milano, Italy
| | - Beatrice Bodega
- Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi" (INGM), Milano, Italy
| | - Paola Riva
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
| | - Franco Cotelli
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milano, Italy
| | - Andrea Biondi
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Anna Marozzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
| | - Gianni Cazzaniga
- Centro Ricerca Tettamanti, Clinica Pediatrica Università di Milano-Bicocca, Centro Maria Letizia Verga, Monza, Italy
| | - Anna Pistocchi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, LITA, Segrate, Italy
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13
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Maia de Oliveira da Silva JP, Brugnerotto AF, S. Romanello K, K. L. Teixeira K, Lanaro C, S. Duarte A, G. L. Costa G, da Silva Araújo A, C. Bezerra MA, de Farias Domingos I, Pereira Martins DA, Malavazi I, F. Costa F, Cunha AF. Global gene expression reveals an increase of HMGB1 and APEX1 proteins and their involvement in oxidative stress, apoptosis and inflammation pathways among beta‐thalassaemia intermedia and major phenotypes. Br J Haematol 2019; 186:608-619. [DOI: 10.1111/bjh.16062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 04/16/2019] [Indexed: 12/19/2022]
Affiliation(s)
| | - Ana Flávia Brugnerotto
- Centro de Hematologia e Hemoterapia Universidade Estadual de Campinas CampinasSão PauloBrazil
| | - Karen S. Romanello
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde Universidade Federal de São Carlos São CarlosSão PauloBrazil
| | - Karina K. L. Teixeira
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde Universidade Federal de São Carlos São CarlosSão PauloBrazil
| | - Carolina Lanaro
- Centro de Hematologia e Hemoterapia Universidade Estadual de Campinas CampinasSão PauloBrazil
| | - Adriana S. Duarte
- Centro de Hematologia e Hemoterapia Universidade Estadual de Campinas CampinasSão PauloBrazil
| | - Gustavo G. L. Costa
- Centro Nacional de Processamento de Alto Desempenho em São Paulo. CENAPAD‐SP Campinas São PauloBrazil
| | | | | | | | | | - Iran Malavazi
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde Universidade Federal de São Carlos São CarlosSão PauloBrazil
| | - Fernando F. Costa
- Centro de Hematologia e Hemoterapia Universidade Estadual de Campinas CampinasSão PauloBrazil
| | - Anderson F. Cunha
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde Universidade Federal de São Carlos São CarlosSão PauloBrazil
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14
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Wang H, Liu C, Liu X, Wang M, Wu D, Gao J, Su P, Nakahata T, Zhou W, Xu Y, Shi L, Ma F, Zhou J. MEIS1 Regulates Hemogenic Endothelial Generation, Megakaryopoiesis, and Thrombopoiesis in Human Pluripotent Stem Cells by Targeting TAL1 and FLI1. Stem Cell Reports 2018; 10:447-460. [PMID: 29358086 PMCID: PMC5830947 DOI: 10.1016/j.stemcr.2017.12.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 01/11/2023] Open
Abstract
Human pluripotent stem cells (hPSCs) provide an unlimited source for generating various kinds of functional blood cells. However, efficient strategies for generating large-scale functional blood cells from hPSCs are still lacking, and the mechanism underlying human hematopoiesis remains largely unknown. In this study, we identified myeloid ectopic viral integration site 1 homolog (MEIS1) as a crucial regulator of hPSC early hematopoietic differentiation. MEIS1 is vital for specification of APLNR+ mesoderm progenitors to functional hemogenic endothelial progenitors (HEPs), thereby controlling formation of hematopoietic progenitor cells (HPCs). TAL1 mediates the function of MEIS1 in HEP specification. In addition, MEIS1 is vital for megakaryopoiesis and thrombopoiesis from hPSCs. Mechanistically, FLI1 acts as a downstream gene necessary for the function of MEIS1 during megakaryopoiesis. Thus, MEIS1 controls human hematopoiesis in a stage-specific manner and can be potentially manipulated for large-scale generation of HPCs or platelets from hPSCs for therapeutic applications in regenerative medicine. MEIS1 knockout impairs hematopoiesis of hPSCs by suppressing HEP specification MEIS1−/− megakaryocytes fail to undergo polyploidization and thrombopoiesis TAL1 mediates the function of MEIS1 in HEP specification FLI1 acts as a downstream target of MEIS1 during megakaryopoiesis and thrombopoiesis
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Affiliation(s)
- Hongtao Wang
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Cuicui Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Xin Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Mengge Wang
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Dan Wu
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Jie Gao
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Pei Su
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Tatsutoshi Nakahata
- Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto 606-8507, Japan
| | - Wen Zhou
- School of Basic Medical Science and Cancer Research Institute, Central South University, Changsha 410013, China
| | - Yuanfu Xu
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Lihong Shi
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Feng Ma
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College, Chengdu 610052, China.
| | - Jiaxi Zhou
- State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Tianjin 300020, China; Center for Stem Cell Medicine, Chinese Academy of Medical Sciences & Department of Stem Cells and Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China.
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15
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Wu SY, Wang LD, Li JL, Xu GM, He ML, Li YY, Huang R. Salmonella spv locus suppresses host innate immune responses to bacterial infection. FISH & SHELLFISH IMMUNOLOGY 2016; 58:387-396. [PMID: 27666190 DOI: 10.1016/j.fsi.2016.09.042] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/14/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
Salmonella enterica serovar typhimurium (S. typhimurium) is globally distributed and causes massive morbidity and mortality in humans and animals. S. typhimurium carries Salmonella plasmid virulence (spv) locus, which is highly conserved and closely related to bacterial pathogenicity, while its exact role in host immune responses during infection remains to be elucidated. To counteract the invaders, the host has evolved numerous strategies, among which the innate immunity and autophagy act as the first defense. Recently, zebrafish has been universally accepted as a valuable and powerful vertebrate model in analyzing bacteria-host interactions. To investigate whether spv locus enhances the virulence of Salmonella by exerting an effect on the host early defense, zebrafish larvae were employed in this study. LD50 of S. typhimurium to zebrafish larvae and bacterial dissemination were analyzed. Sudan black B and neutral red staining were performed to detect the responses of neutrophils and macrophages to Salmonella infection. Autophagy agonist Torin1 and inhibitor Chloroquine were used to interfere in autophagic flux, and the protein level of Lc3 and p62 were measured by western blotting. Results indicated that spv locus could decrease the LD50 of S. typhimurium to zebrafish larvae, accelerate the reproduction and dissemination of bacteria by inhibiting the function of neutrophils and macrophages. Moreover, spv locus restrained the formation of autophagosomes in the earlier stage of autophagy. These findings suggested the virulence of spv locus involving in suppressing host innate immune responses for the first time, which shed new light on the role of spv operon in Salmonella pathogenicity.
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Affiliation(s)
- Shu-Yan Wu
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Li-Dan Wang
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Jin-Ling Li
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Guang-Mei Xu
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Mei-Ling He
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Yuan-Yuan Li
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China
| | - Rui Huang
- Medical College of Soochow University, Department of Medical Microbiology, No. 199, Ren Ai Road, Suzhou, Jiangsu, 215123, PR China.
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16
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Miller ME, Rosten P, Lemieux ME, Lai C, Humphries RK. Meis1 Is Required for Adult Mouse Erythropoiesis, Megakaryopoiesis and Hematopoietic Stem Cell Expansion. PLoS One 2016; 11:e0151584. [PMID: 26986211 PMCID: PMC4795694 DOI: 10.1371/journal.pone.0151584] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/01/2016] [Indexed: 01/03/2023] Open
Abstract
Meis1 is recognized as an important transcriptional regulator in hematopoietic development and is strongly implicated in the pathogenesis of leukemia, both as a Hox transcription factor co-factor and independently. Despite the emerging recognition of Meis1's importance in the context of both normal and leukemic hematopoiesis, there is not yet a full understanding of Meis1's functions and the relevant pathways and genes mediating its functions. Recently, several conditional mouse models for Meis1 have been established. These models highlight a critical role for Meis1 in adult mouse hematopoietic stem cells (HSCs) and implicate reactive oxygen species (ROS) as a mediator of Meis1 function in this compartment. There are, however, several reported differences between these studies in terms of downstream progenitor populations impacted and effectors of function. In this study, we describe further characterization of a conditional knockout model based on mice carrying a loxP-flanked exon 8 of Meis1 which we crossed onto the inducible Cre localization/expression strains, B6;129-Gt(ROSA)26Sor(tm1(Cre/ERT)Nat)/J or B6.Cg-Tg(Mx1-Cre)1Cgn/J. Findings obtained from these two inducible Meis1 knockout models confirm and extend previous reports of the essential role of Meis1 in adult HSC maintenance and expansion and provide new evidence that highlights key roles of Meis1 in both megakaryopoiesis and erythropoiesis. Gene expression analyses point to a number of candidate genes involved in Meis1's role in hematopoiesis. Our data additionally support recent evidence of a role of Meis1 in ROS regulation.
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Affiliation(s)
- Michelle Erin Miller
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - Patty Rosten
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | | | - Courteney Lai
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - R. Keith Humphries
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
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17
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Sornambikai S, Hin LQ, Marimuthu K, Abdul Kadir MR. Fish embryo toxicity assessment of o-dianisidine in Clarias gariepinus and its electrochemical treatment in aquatic samples using super conductive carbon black. RSC Adv 2016. [DOI: 10.1039/c6ra00158k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present study tested fish embryo toxicity (FET) of o-dianisidine (o-dian) on African catfish (Clarias gariepinus) and its electrochemical treatment through electro-oxidation of real aquatic samples for the first time.
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Affiliation(s)
- Sundaram Sornambikai
- Medical Devices & Technology Group
- Faculty of Biosciences & Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru
- Malaysia
| | - Lim Qing Hin
- Department of Biotechnology
- Faculty of Applied Sciences
- AIMST University
- Bedong
- Malaysia
| | - Kasi Marimuthu
- Department of Biotechnology
- Faculty of Applied Sciences
- AIMST University
- Bedong
- Malaysia
| | - Mohammed Rafiq Abdul Kadir
- Medical Devices & Technology Group
- Faculty of Biosciences & Medical Engineering
- Universiti Teknologi Malaysia
- Johor Bahru
- Malaysia
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18
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Kocabas F, Xie L, Xie J, Yu Z, DeBerardinis RJ, Kimura W, Thet S, Elshamy AF, Abouellail H, Muralidhar S, Liu X, Chen C, Sadek HA, Zhang CC, Zheng J. Hypoxic metabolism in human hematopoietic stem cells. Cell Biosci 2015. [PMID: 26221532 PMCID: PMC4517642 DOI: 10.1186/s13578-015-0020-3] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background Adult hematopoietic stem cells (HSCs) are maintained in a microenvironment, known as niche in the endosteal regions of the bone marrow. This stem cell niche with low oxygen tension requires HSCs to adopt a unique metabolic profile. We have recently demonstrated that mouse long-term hematopoietic stem cells (LT-HSCs) utilize glycolysis instead of mitochondrial oxidative phosphorylation as their main energy source. However, the metabolic phenotype of human hematopoietic progenitor and stem cells (HPSCs) remains unknown. Results We show that HPSCs have a similar metabolic phenotype, as shown by high rates of glycolysis, and low rates of oxygen consumption. Fractionation of human mobilized peripheral blood cells based on their metabolic footprint shows that cells with a low mitochondrial potential are highly enriched for HPSCs. Remarkably, low MP cells had much better repopulation ability as compared to high MP cells. Moreover, similar to their murine counterparts, we show that Hif-1α is upregulated in human HPSCs, where it is transcriptionally regulated by Meis1. Finally, we show that Meis1 and its cofactors Pbx1 and HoxA9 play an important role in transcriptional activation of Hif-1α in a cooperative manner. Conclusions These findings highlight the unique metabolic properties of human HPSCs and the transcriptional network that regulates their metabolic phenotype. Electronic supplementary material The online version of this article (doi:10.1186/s13578-015-0020-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fatih Kocabas
- Department of Internal Medicine, Division of Cardiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA.,Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, 34755 Turkey
| | - Li Xie
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital / Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025 China.,Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Chongqing South Road 280, Shanghai, 200025 China
| | - Jingjing Xie
- Bingzhou Medical University, Taishan Scholar Program, Yantai, 264003 China
| | - Zhuo Yu
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital / Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025 China.,Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Chongqing South Road 280, Shanghai, 200025 China
| | - Ralph J DeBerardinis
- Departments of Pediatrics and Genetics, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA
| | - Wataru Kimura
- Department of Internal Medicine, Division of Cardiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA
| | - SuWannee Thet
- Department of Internal Medicine, Division of Cardiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA
| | - Ahmed F Elshamy
- Department of Clinical Pathology, El Galaa Hospital, Cairo, Egypt
| | | | - Shalini Muralidhar
- Department of Internal Medicine, Division of Cardiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA
| | - Xiaoye Liu
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Chongqing South Road 280, Shanghai, 200025 China
| | - Chiqi Chen
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital / Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025 China
| | - Hesham A Sadek
- Department of Internal Medicine, Division of Cardiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390 USA
| | - Cheng Cheng Zhang
- Departments of Physiology and Developmental Biology, UT Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
| | - Junke Zheng
- Hongqiao International Institute of Medicine, Shanghai Tongren Hospital / Faculty of Basic Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025 China.,Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Chongqing South Road 280, Shanghai, 200025 China
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19
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Epigenetic therapy restores normal hematopoiesis in a zebrafish model of NUP98–HOXA9-induced myeloid disease. Leukemia 2015; 29:2086-97. [DOI: 10.1038/leu.2015.126] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 04/07/2015] [Accepted: 04/22/2015] [Indexed: 12/26/2022]
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20
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Zeddies S, Jansen SBG, di Summa F, Geerts D, Zwaginga JJ, van der Schoot CE, von Lindern M, Thijssen-Timmer DC. MEIS1 regulates early erythroid and megakaryocytic cell fate. Haematologica 2014; 99:1555-64. [PMID: 25107888 DOI: 10.3324/haematol.2014.106567] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
MEIS1 is a transcription factor expressed in hematopoietic stem and progenitor cells and in mature megakaryocytes. This biphasic expression of MEIS1 suggests that the function of MEIS1 in stem cells is distinct from its function in lineage committed cells. Mouse models show that Meis1 is required for renewal of stem cells, but the function of MEIS1 in human hematopoietic progenitor cells has not been investigated. We show that two MEIS1 splice variants are expressed in hematopoietic progenitor cells. Constitutive expression of both variants directed human hematopoietic progenitors towards a megakaryocyte-erythrocyte progenitor fate. Ectopic expression of either MEIS1 splice variant in common myeloid progenitor cells, and even in granulocyte-monocyte progenitors, resulted in increased erythroid differentiation at the expense of granulocyte and macrophage differentiation. Conversely, silencing MEIS1 expression in progenitor cells induced a block in erythroid expansion and decreased megakaryocytic colony formation capacity. Gene expression profiling revealed that both MEIS1 splice variants induce a transcriptional program enriched for erythroid and megakaryocytic genes. Our results indicate that MEIS1 expression induces lineage commitment towards a megakaryocyte-erythroid progenitor cell fate in common myeloid progenitor cells through activation of genes that define a megakaryocyte-erythroid-specific gene expression program.
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Affiliation(s)
| | | | | | - Dirk Geerts
- Department of Pediatric Oncology, Erasmus Medical Center Rotterdam, Sanquin Blood Supply, Leiden, The Netherlands
| | - Jaap J Zwaginga
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center and the Jon J van Rood Center for Clinical Transfusion Research, Sanquin Blood Supply, Leiden, The Netherlands
| | - C Ellen van der Schoot
- Department of Experimental Immunohematology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center Amsterdam, Sanquin Blood Supply, Leiden, The Netherlands
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21
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Schulte EC, Kousi M, Tan PL, Tilch E, Knauf F, Lichtner P, Trenkwalder C, Högl B, Frauscher B, Berger K, Fietze I, Hornyak M, Oertel WH, Bachmann CG, Zimprich A, Peters A, Gieger C, Meitinger T, Müller-Myhsok B, Katsanis N, Winkelmann J. Targeted resequencing and systematic in vivo functional testing identifies rare variants in MEIS1 as significant contributors to restless legs syndrome. Am J Hum Genet 2014; 95:85-95. [PMID: 24995868 DOI: 10.1016/j.ajhg.2014.06.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 06/10/2014] [Indexed: 11/19/2022] Open
Abstract
Restless legs syndrome (RLS) is a common neurologic condition characterized by nocturnal dysesthesias and an urge to move, affecting the legs. RLS is a complex trait, for which genome-wide association studies (GWASs) have identified common susceptibility alleles of modest (OR 1.2-1.7) risk at six genomic loci. Among these, variants in MEIS1 have emerged as the largest risk factors for RLS, suggesting that perturbations in this transcription factor might be causally related to RLS susceptibility. To establish this causality, direction of effect, and total genetic burden of MEIS1, we interrogated 188 case subjects and 182 control subjects for rare alleles not captured by previous GWASs, followed by genotyping of ∼3,000 case subjects and 3,000 control subjects, and concluded with systematic functionalization of all discovered variants using a previously established in vivo model of neurogenesis. We observed a significant excess of rare MEIS1 variants in individuals with RLS. Subsequent assessment of all nonsynonymous variants by in vivo complementation revealed an excess of loss-of-function alleles in individuals with RLS. Strikingly, these alleles compromised the function of the canonical MEIS1 splice isoform but were irrelevant to an isoform known to utilize an alternative 3' sequence. Our data link MEIS1 loss of function to the etiopathology of RLS, highlight how combined sequencing and systematic functional annotation of rare variation at GWAS loci can detect risk burden, and offer a plausible explanation for the specificity of phenotypic expressivity of loss-of-function alleles at a locus broadly necessary for neurogenesis and neurodevelopment.
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Affiliation(s)
- Eva C Schulte
- Neurologische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany; Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Maria Kousi
- Center for Human Disease Modeling, Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Perciliz L Tan
- Center for Human Disease Modeling, Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Erik Tilch
- Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany; Institut für Humangenetik, Technische Universität München, 81675 Munich, Germany
| | - Franziska Knauf
- Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Peter Lichtner
- Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany; Institut für Humangenetik, Technische Universität München, 81675 Munich, Germany
| | - Claudia Trenkwalder
- Paracelsus Elena Klinik, 34128 Kassel, Germany; Klinik für Neurochirurgie, Georg August Universität, 37075 Göttingen, Germany
| | - Birgit Högl
- Department of Neurology, Medizinische Universität Innsbruck, 6020 Innsbruck, Austria
| | - Birgit Frauscher
- Department of Neurology, Medizinische Universität Innsbruck, 6020 Innsbruck, Austria
| | - Klaus Berger
- Institut für Epidemiologie und Sozialmedizin, Westfälische Wilhelms Universität Münster, 48149 Münster, Germany
| | - Ingo Fietze
- Zentrum für Schlafmedizin, Charité Universitätsmedizin, 10117 Berlin, Germany
| | - Magdolna Hornyak
- Neurologische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany; Interdisziplinäres Schmerzzentrum, Albert-Ludwigs Universität Freiburg, 79106 Freiburg, Germany; Diakoniewerk München-Maxvorstadt, 80799 Munich, Germany
| | - Wolfgang H Oertel
- Klinik für Neurologie, Philipps Universität Marburg, 35039 Marburg, Germany
| | - Cornelius G Bachmann
- Abteilung für Neurologie, Paracelsus Klinikum Osnabrück, 49076 Osnabrück, Germany; Klinische Neurophysiologie, Georg August Universität, 37075 Göttingen, Germany
| | - Alexander Zimprich
- Department of Neurology, Medizinische Universität Wien, 1090 Vienna, Austria
| | - Annette Peters
- Institute of Epidemiology II, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Christian Gieger
- Institute of Genetic Epidemiology, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Thomas Meitinger
- Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany; Institut für Humangenetik, Technische Universität München, 81675 Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Bertram Müller-Myhsok
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Max-Planck Institut für Psychiatrie München, 80804 Munich, Germany; Institute of Translational Medicine, University of Liverpool, Liverpool L69 3BX, UK
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Juliane Winkelmann
- Neurologische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 Munich, Germany; Institut für Humangenetik, Helmholtz Zentrum München, 85764 Munich, Germany; Institut für Humangenetik, Technische Universität München, 81675 Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Department of Neurology and Neurosciences, Center for Sleep Sciences and Medicine, Stanford University, Palo Alto, CA 94304, USA.
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Su Z, Si W, Li L, Zhou B, Li X, Xu Y, Xu C, Jia H, Wang QK. MiR-144 regulates hematopoiesis and vascular development by targeting meis1 during zebrafish development. Int J Biochem Cell Biol 2014; 49:53-63. [PMID: 24448023 DOI: 10.1016/j.biocel.2014.01.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 12/24/2013] [Accepted: 01/07/2014] [Indexed: 12/12/2022]
Abstract
Hematopoiesis is a dynamic process by which peripheral blood lineages are developed. It is a process tightly regulated by many intrinsic and extrinsic factors, including transcriptional factors and signaling molecules. However, the epigenetic regulation of hematopoiesis, for example, regulation via microRNAs (miRNAs), remains incompletely understood. Here we show that miR-144 regulates hematopoiesis and vascular development in zebrafish. Overexpression of miR-144 inhibited primitive hematopoiesis as demonstrated by a reduced number of circulating blood cells, reduced o-dianisidine staining of hemoglobin, and reduced expression of hbαe1, hbβe1, gata1 and pu.1. Overexpression of miR-144 also inhibited definitive hematopoiesis as shown by reduced expression of runx1 and c-myb. Mechanistically, miR-144 regulates hematopoiesis by repressing expression of meis1 involved in hematopoiesis. Both real-time RT-PCR and Western blot analyses showed that overexpression of miR-144 repressed expression of meis1. Bioinformatic analysis predicts a target binding sequence for miR-144 at the 3'-UTR of meis1. Deletion of the miR-144 target sequence eliminated the repression of meis1 expression mediated by miR-144. The miR-144-mediated abnormal phenotypes were partially rescued by co-injection of meis1 mRNA and could be almost completely rescued by injection of both meis1 and gata1 mRNA. Finally, because meis1 is involved in vascular development, we tested the effect of miR-144 on vascular development. Overexpression of miR-144 resulted in abnormal vascular development of intersegmental vessels in transgenic zebrafish with Flk1p-EGFP, and the defect was rescued by co-injection of meis1 mRNA. These findings establish miR-144 as a novel miRNA that regulates hematopoiesis and vascular development by repressing expression of meis1.
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Affiliation(s)
- Zhenhong Su
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China; Key Laboratory of Kidney Disease Pathogenesis and Intervention of Hubei Province, Key Discipline of Pharmacy of Hubei Department of Education, Medical College, Hubei Polytechnic University, Huangshi, Hubei, PR China
| | - Wenxia Si
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Lei Li
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Bisheng Zhou
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Xiuchun Li
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yan Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Chengqi Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Haibo Jia
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China
| | - Qing K Wang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, PR China; Center for Cardiovascular Genetics, Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.
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23
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Abstract
Platelet endothelial aggregation receptor-1 (PEAR1) participates in platelet aggregation via sustaining αIIbβ3 activation. To investigate the role of PEAR1 in platelet formation, we monitored and manipulated PEAR1 expression in vitro in differentiating human CD34(+) hematopoietic stem cells and in vivo in zebrafish embryos. PEAR1 expression rose during CD34(+) cell differentiation up to megakaryocyte (MK) maturation. Two different lentiviral short hairpin knockdowns of PEAR1 did not affect erythropoiesis in CD34(+) cells, but increased colony-forming unit MK cell numbers twofold vs control in clonogenic assays, without substantially modifying MK maturation. The PEAR1 knockdown resulted in a twofold reduction of the phosphatase and TENsin homolog (PTEN) phosphatase expression and modulated gene expression of several phosphatidylinositol 3-kinase (PI3K)-Akt and Notch pathway genes. In zebrafish, Pear1 expression increased progressively during the first 3 days of embryo development. Both ATG and splice-blocking PEAR1 morpholinos enhanced thrombopoiesis, without affecting erythropoiesis. Western blots of 3-day-old Pear1 knockdown zebrafish revealed elevated Akt phosphorylation, coupled to transcriptional downregulation of the PTEN isoform Ptena. Neutralization by morpholinos of Ptena, but not of Ptenb, phenocopied the Pear1 zebrafish knockdown and triggered enhanced Akt phosphorylation and thrombocyte formation. In summary, this is the first demonstration that PEAR1 influences the PI3K/PTEN pathway, a critical determinant of Akt phosphorylation, itself controlling megakaryopoiesis and thrombopoiesis.
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Amali AA, Sie L, Winkler C, Featherstone M. Zebrafish hoxd4a acts upstream of meis1.1 to direct vasculogenesis, angiogenesis and hematopoiesis. PLoS One 2013; 8:e58857. [PMID: 23554940 PMCID: PMC3598951 DOI: 10.1371/journal.pone.0058857] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 02/08/2013] [Indexed: 01/22/2023] Open
Abstract
Mice lacking the 4th-group paralog Hoxd4 display malformations of the anterior vertebral column, but are viable and fertile. Here, we report that zebrafish embryos having decreased function of the orthologous hoxd4a gene manifest striking perturbations in vasculogenesis, angiogenesis and primitive and definitive hematopoiesis. These defects are preceded by reduced expression of the hemangioblast markers scl1, lmo2 and fli1 within the posterior lateral plate mesoderm (PLM) at 13 hours post fertilization (hpf). Epistasis analysis revealed that hoxd4a acts upstream of meis1.1 but downstream of cdx4 as early as the shield stage in ventral-most mesoderm fated to give rise to hemangioblasts, leading us to propose that loss of hoxd4a function disrupts hemangioblast specification. These findings place hoxd4a high in a genetic hierarchy directing hemangioblast formation downstream of cdx1/cdx4 and upstream of meis1.1. An additional consequence of impaired hoxd4a and meis1.1 expression is the deregulation of multiple Hox genes implicated in vasculogenesis and hematopoiesis which may further contribute to the defects described here. Our results add to evidence implicating key roles for Hox genes in their initial phase of expression early in gastrulation.
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Affiliation(s)
| | - Lawrence Sie
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Christoph Winkler
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Mark Featherstone
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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25
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Burns G, Thorndyke MC, Peck LS, Clark MS. Transcriptome pyrosequencing of the Antarctic brittle star Ophionotus victoriae. Mar Genomics 2013; 9:9-15. [DOI: 10.1016/j.margen.2012.05.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/27/2012] [Accepted: 05/28/2012] [Indexed: 11/25/2022]
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26
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A GWAS sequence variant for platelet volume marks an alternative DNM3 promoter in megakaryocytes near a MEIS1 binding site. Blood 2012; 120:4859-68. [PMID: 22972982 PMCID: PMC3520622 DOI: 10.1182/blood-2012-01-401893] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We recently identified 68 genomic loci where common sequence variants are associated with platelet count and volume. Platelets are formed in the bone marrow by megakaryocytes, which are derived from hematopoietic stem cells by a process mainly controlled by transcription factors. The homeobox transcription factor MEIS1 is uniquely transcribed in megakaryocytes and not in the other lineage-committed blood cells. By ChIP-seq, we show that 5 of the 68 loci pinpoint a MEIS1 binding event within a group of 252 MK-overexpressed genes. In one such locus in DNM3, regulating platelet volume, the MEIS1 binding site falls within a region acting as an alternative promoter that is solely used in megakaryocytes, where allelic variation dictates different levels of a shorter transcript. The importance of dynamin activity to the latter stages of thrombopoiesis was confirmed by the observation that the inhibitor Dynasore reduced murine proplatelet for-mation in vitro.
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27
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Abstract
The transcription factor Meis1 is expressed preferentially in hematopoietic stem cells (HSCs) and overexpressed in certain leukemias. However, the functions of Meis1 in hematopoiesis remain largely unknown. In the present study, we found that Meis1 is required for the maintenance of hematopoiesis under stress and over the long term, whereas steady-state hematopoiesis was sustained in the absence of Meis1 in inducible knock-out mice. BM cells of Meis1-deficient mice showed reduced colony formation and contained significantly fewer numbers of long-term HSCs, which exhibited loss of quiescence. Further, we found that Meis1 deletion led to the accumulation of reactive oxygen species in HSCs and decreased expression of genes implicated in hypoxia response. Finally, reactive oxygen species scavenging by N-acetyl cysteine or stabilization of hypoxia signaling by knockdown of the von-Hippel-Lindau (VHL) protein led to reversal of the effects of Meis1 deletion. The results of the present study demonstrate that Meis1 protects and preserves HSCs by restricting oxidative metabolism.
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28
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Liu F, Yao S, Zhang T, Xiao C, Shang Y, Liu J, Mo X. Kzp Regulates the Transcription of gata2 and pu.1 during Primitive Hematopoiesis in Zebrafish Embryos. J Genet Genomics 2012; 39:463-71. [DOI: 10.1016/j.jgg.2012.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 06/24/2012] [Accepted: 06/28/2012] [Indexed: 10/27/2022]
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Serbanovic-Canic J, Cvejic A, Soranzo N, Stemple DL, Ouwehand WH, Freson K. Silencing of RhoA nucleotide exchange factor, ARHGEF3, reveals its unexpected role in iron uptake. Blood 2011; 118:4967-76. [PMID: 21715309 PMCID: PMC3208301 DOI: 10.1182/blood-2011-02-337295] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Accepted: 06/13/2011] [Indexed: 11/20/2022] Open
Abstract
Genomewide association meta-analysis studies have identified > 100 independent genetic loci associated with blood cell indices, including volume and count of platelets and erythrocytes. Although several of these loci encode known regulators of hematopoiesis, the mechanism by which most sequence variants exert their effect on blood cell formation remains elusive. An example is the Rho guanine nucleotide exchange factor, ARHGEF3, which was previously implicated by genomewide association meta-analysis studies in bone cell biology. Here, we report on the unexpected role of ARHGEF3 in regulation of iron uptake and erythroid cell maturation. Although early erythroid differentiation progressed normally, silencing of arhgef3 in Danio rerio resulted in microcytic and hypochromic anemia. This was rescued by intracellular supplementation of iron, showing that arhgef3-depleted erythroid cells are fully capable of hemoglobinization. Disruption of the arhgef3 target, RhoA, also produced severe anemia, which was, again, corrected by iron injection. Moreover, silencing of ARHGEF3 in erythromyeloblastoid cells K562 showed that the uptake of transferrin was severely impaired. Taken together, this is the first study to provide evidence for ARHGEF3 being a regulator of transferrin uptake in erythroid cells, through activation of RHOA.
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Affiliation(s)
- Jovana Serbanovic-Canic
- Department of Haematology, University of Cambridge and NHS Blood and Transplant, Cambridge, UK
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