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Wu B, Xu W, Wu K, Li Y, Hu M, Feng C, Zhu C, Zheng J, Cui X, Li J, Fan D, Zhang F, Liu Y, Chen J, Liu C, Li G, Qiu Q, Qu K, Wang W, Wang K. Single-cell analysis of the amphioxus hepatic caecum and vertebrate liver reveals genetic mechanisms of vertebrate liver evolution. Nat Ecol Evol 2024; 8:1972-1990. [PMID: 39152328 DOI: 10.1038/s41559-024-02510-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 07/19/2024] [Indexed: 08/19/2024]
Abstract
The evolution of the vertebrate liver is a prime example of the evolution of complex organs, yet the driving genetic factors behind it remain unknown. Here we study the evolutionary genetics of liver by comparing the amphioxus hepatic caecum and the vertebrate liver, as well as examining the functional transition within vertebrates. Using in vivo and in vitro experiments, single-cell/nucleus RNA-seq data and gene knockout experiments, we confirm that the amphioxus hepatic caecum and vertebrate liver are homologous organs and show that the emergence of ohnologues from two rounds of whole-genome duplications greatly contributed to the functional complexity of the vertebrate liver. Two ohnologues, kdr and flt4, play an important role in the development of liver sinusoidal endothelial cells. In addition, we found that liver-related functions such as coagulation and bile production evolved in a step-by-step manner, with gene duplicates playing a crucial role. We reconstructed the genetic footprint of the transfer of haem detoxification from the liver to the spleen during vertebrate evolution. Together, these findings challenge the previous hypothesis that organ evolution is primarily driven by regulatory elements, underscoring the importance of gene duplicates in the emergence and diversification of a complex organ.
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Affiliation(s)
- Baosheng Wu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China
| | - Wenjie Xu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Kunjin Wu
- Key Laboratory of Surgical Critical Care and Life Support (Xi'an Jiaotong University), Ministry of Education, Xi'an, China
- Department of Hepatobiliary Surgery and Liver Transplantation, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ye Li
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Mingliang Hu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Chenguang Feng
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Chenglong Zhu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Jiangmin Zheng
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Xinxin Cui
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Jing Li
- Key Laboratory of Surgical Critical Care and Life Support (Xi'an Jiaotong University), Ministry of Education, Xi'an, China
- Department of Hepatobiliary Surgery and Liver Transplantation, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Deqian Fan
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Fenghua Zhang
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Yuxuan Liu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Jinping Chen
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China
| | - Chang Liu
- Key Laboratory of Surgical Critical Care and Life Support (Xi'an Jiaotong University), Ministry of Education, Xi'an, China
- Department of Hepatobiliary Surgery and Liver Transplantation, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Guang Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China.
| | - Qiang Qiu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China.
| | - Kai Qu
- Key Laboratory of Surgical Critical Care and Life Support (Xi'an Jiaotong University), Ministry of Education, Xi'an, China.
- Department of Hepatobiliary Surgery and Liver Transplantation, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
| | - Wen Wang
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China.
- New Cornerstone Science Laboratory, Xi'an, China.
| | - Kun Wang
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China.
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2
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Choi U, Hu M, Zhang Q, Sieburth D. The head mesodermal cell couples FMRFamide neuropeptide signaling with rhythmic muscle contraction in C. elegans. Nat Commun 2023; 14:4218. [PMID: 37452027 PMCID: PMC10349088 DOI: 10.1038/s41467-023-39955-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 07/06/2023] [Indexed: 07/18/2023] Open
Abstract
FMRFamides are evolutionarily conserved neuropeptides that play critical roles in behavior, energy balance, and reproduction. Here, we show that FMRFamide signaling from the nervous system is critical for the rhythmic activation of a single cell of previously unknown function, the head mesodermal cell (hmc) in C. elegans. Behavioral, calcium imaging, and genetic studies reveal that release of the FLP-22 neuropeptide from the AVL neuron in response to pacemaker signaling activates hmc every 50 s through an frpr-17 G protein-coupled receptor (GPCR) and a protein kinase A signaling cascade in hmc. hmc activation results in muscle contraction through coupling by gap junctions composed of UNC-9/Innexin. hmc activation is inhibited by the neuronal release of a second FMRFamide-like neuropeptide, FLP-9, which functions through its GPCR, frpr-21, in hmc. This study reveals a function for two opposing FMRFamide signaling pathways in controlling the rhythmic activation of a target cell through volume transmission.
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Affiliation(s)
- Ukjin Choi
- DSR graduate program, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
- Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Mingxi Hu
- Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Qixin Zhang
- MPHY program, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Derek Sieburth
- Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA.
- Department of Physiology and Neuroscience, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA.
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3
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Jenike AE, Jenike KM, Peterson KJ, Fromm B, Halushka MK. Direct observation of the evolution of cell-type-specific microRNA expression signatures supports the hematopoietic origin model of endothelial cells. Evol Dev 2023; 25:226-239. [PMID: 37157156 PMCID: PMC10302300 DOI: 10.1111/ede.12438] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 03/22/2023] [Accepted: 04/26/2023] [Indexed: 05/10/2023]
Abstract
The evolution of specialized cell-types is a long-standing interest of biologists, but given the deep time-scales very difficult to reconstruct or observe. microRNAs have been linked to the evolution of cellular complexity and may inform on specialization. The endothelium is a vertebrate-specific specialization of the circulatory system that enabled a critical new level of vasoregulation. The evolutionary origin of these endothelial cells is unclear. We hypothesized that Mir-126, an endothelial cell-specific microRNA may be informative. We here reconstruct the evolutionary history of Mir-126. Mir-126 likely appeared in the last common ancestor of vertebrates and tunicates, which was a species without an endothelium, within an intron of the evolutionary much older EGF Like Domain Multiple (Egfl) locus. Mir-126 has a complex evolutionary history due to duplications and losses of both the host gene and the microRNA. Taking advantage of the strong evolutionary conservation of the microRNA among Olfactores, and using RNA in situ hybridization, we localized Mir-126 in the tunicate Ciona robusta. We found exclusive expression of the mature Mir-126 in granular amebocytes, supporting a long-proposed scenario that endothelial cells arose from hemoblasts, a type of proto-endothelial amoebocyte found throughout invertebrates. This observed change of expression of Mir-126 from proto-endothelial amoebocytes in the tunicate to endothelial cells in vertebrates is the first direct observation of the evolution of a cell-type in relation to microRNA expression indicating that microRNAs can be a prerequisite of cell-type evolution.
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Affiliation(s)
- Ana E. Jenike
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205 USA
| | - Katharine M. Jenike
- Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205 USA
| | - Kevin J. Peterson
- Department of Biological Sciences, Dartmouth College, Hanover NH, USA
| | - Bastian Fromm
- The Arctic University Museum of Norway, UiT-The Arctic University of Norway, 9006 Tromsø, Norway
| | - Marc K. Halushka
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205 USA
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4
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Guatelli S, Ferrario C, Bonasoro F, Anjo SI, Manadas B, Candia Carnevali MD, Varela Coelho A, Sugni M. More than a simple epithelial layer: multifunctional role of echinoderm coelomic epithelium. Cell Tissue Res 2022; 390:207-227. [PMID: 36083358 PMCID: PMC9630195 DOI: 10.1007/s00441-022-03678-x] [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: 09/16/2021] [Accepted: 08/23/2022] [Indexed: 11/02/2022]
Abstract
In echinoderms, the coelomic epithelium (CE) is reportedly the source of new circulating cells (coelomocytes) as well as the provider of molecular factors such as immunity-related molecules. However, its overall functions have been scarcely studied in detail. In this work, we used an integrated approach based on both microscopy (light and electron) and proteomic analyses to investigate the arm CE in the starfish Marthasterias glacialis during different physiological conditions (i.e., non-regenerating and/or regenerating). Our results show that CE cells share both ultrastructural and proteomic features with circulating coelomocytes (echinoderm immune cells). Additionally, microscopy and proteomic analyses indicate that CE cells are actively involved in protein synthesis and processing, and membrane trafficking processes such as phagocytosis (particularly of myocytes) and massive secretion phenomena. The latter might provide molecules (e.g., immune factors) and fluids for proper arm growth/regrowth. No stem cell marker was identified and no pre-existing stem cell was observed within the CE. Rather, during regeneration, CE cells undergo dedifferentiation and epithelial-mesenchymal transition to deliver progenitor cells for tissue replacement. Overall, our work underlines that echinoderm CE is not a "simple epithelial lining" and that instead it plays multiple functions which span from immunity-related roles as well as being a source of regeneration-competent cells for arm growth/regrowth.
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Affiliation(s)
- Silvia Guatelli
- Department of Environmental Science and Policy, University of Milan, Via Celoria 26, 20133, Milan, Italy
| | - Cinzia Ferrario
- Department of Environmental Science and Policy, University of Milan, Via Celoria 26, 20133, Milan, Italy
- Center for Complexity & Biosystems, Department of Physics, University of Milan, Via Celoria 16, 20133, Milan, Italy
| | - Francesco Bonasoro
- Department of Environmental Science and Policy, University of Milan, Via Celoria 26, 20133, Milan, Italy
| | - Sandra I Anjo
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal
| | - Bruno Manadas
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, 3004-504, Coimbra, Portugal
| | | | - Ana Varela Coelho
- ITQB-Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157, Oeiras, Portugal.
| | - Michela Sugni
- Department of Environmental Science and Policy, University of Milan, Via Celoria 26, 20133, Milan, Italy.
- Center for Complexity & Biosystems, Department of Physics, University of Milan, Via Celoria 16, 20133, Milan, Italy.
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5
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Kotlyarov S. Immune Function of Endothelial Cells: Evolutionary Aspects, Molecular Biology and Role in Atherogenesis. Int J Mol Sci 2022; 23:ijms23179770. [PMID: 36077168 PMCID: PMC9456046 DOI: 10.3390/ijms23179770] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Atherosclerosis is one of the key problems of modern medicine, which is due to the high prevalence of atherosclerotic cardiovascular diseases and their significant share in the structure of morbidity and mortality in many countries. Atherogenesis is a complex chain of events that proceeds over many years in the vascular wall with the participation of various cells. Endothelial cells are key participants in vascular function. They demonstrate involvement in the regulation of vascular hemodynamics, metabolism, and innate immunity, which act as leading links in the pathogenesis of atherosclerosis. These endothelial functions have close connections and deep evolutionary roots, a better understanding of which will improve the prospects of early diagnosis and effective treatment.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
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6
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Ho VW, Grainger DE, Chagraoui H, Porcher C. Specification of the haematopoietic stem cell lineage: From blood-fated mesodermal angioblasts to haemogenic endothelium. Semin Cell Dev Biol 2022; 127:59-67. [PMID: 35125239 DOI: 10.1016/j.semcdb.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 11/19/2022]
Abstract
Haematopoietic stem and progenitor cells emerge from specialized haemogenic endothelial cells in select vascular beds during embryonic development. Specification and commitment to the blood lineage, however, occur before endothelial cells are endowed with haemogenic competence, at the time of mesoderm patterning and production of endothelial cell progenitors (angioblasts). Whilst early blood cell fate specification has long been recognized, very little is known about the mechanisms that induce endothelial cell diversification and progressive acquisition of a blood identity by a subset of these cells. Here, we review the endothelial origin of the haematopoietic system and the complex developmental journey of blood-fated angioblasts. We discuss how recent technological advances will be instrumental to examine the diversity of the embryonic anatomical niches, signaling pathways and downstream epigenetic and transcriptional processes controlling endothelial cell heterogeneity and blood cell fate specification. Ultimately, this will give essential insights into the ontogeny of the cells giving rise to haematopoietic stem cells, that may aid in the development of novel strategies for their in vitro production for clinical purposes.
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Affiliation(s)
- Vivien W Ho
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - David E Grainger
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Hedia Chagraoui
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Catherine Porcher
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK.
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7
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Allievi A, Canavesi M, Ferrario C, Sugni M, Bonasoro F. An evo-devo perspective on the regeneration patterns of continuous arm structures in stellate echinoderms. THE EUROPEAN ZOOLOGICAL JOURNAL 2022. [DOI: 10.1080/24750263.2022.2039309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- A. Allievi
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
| | - M. Canavesi
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
| | - C. Ferrario
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
- Center for Complexity and Biosystems, Department of Physics, University of Milan, Milan, Italy
| | - M. Sugni
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
- Center for Complexity and Biosystems, Department of Physics, University of Milan, Milan, Italy
- GAIA 2050 Center, Department of Environmental Science and Policy, University of Milan, Milan, Italy
| | - F. Bonasoro
- Department of Environmental Science and Policy, University of Milan, Milan, Italy
- GAIA 2050 Center, Department of Environmental Science and Policy, University of Milan, Milan, Italy
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8
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Misra A, Rehan R, Lin A, Patel S, Fisher EA. Emerging Concepts of Vascular Cell Clonal Expansion in Atherosclerosis. Arterioscler Thromb Vasc Biol 2022; 42:e74-e84. [PMID: 35109671 PMCID: PMC8988894 DOI: 10.1161/atvbaha.121.316093] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Clonal expansion is a process that can drive pathogenesis in human diseases, with atherosclerosis being a prominent example. Despite advances in understanding the etiology of atherosclerosis, clonality studies of vascular cells remain in an early stage. Recently, several paradigm-shifting preclinical studies have identified clonal expansion of progenitor cells in the vasculature in response to atherosclerosis. This review provides an overview of cell clonality in atherosclerotic progression, focusing particularly on smooth muscle cells and macrophages. We discuss key findings from the latest research that give insight into the mechanisms by which clonal expansion of vascular cells contributes to disease pathology. The further probing of these mechanisms will provide innovative directions for future progress in the understanding and therapy of atherosclerosis and its associated cardiovascular diseases.
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Affiliation(s)
- Ashish Misra
- Heart Research Institute, Sydney, NSW 2042, Australia,Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Rajan Rehan
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia,Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
| | - Alexander Lin
- Heart Research Institute, Sydney, NSW 2042, Australia,School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Sanjay Patel
- Heart Research Institute, Sydney, NSW 2042, Australia,Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia,Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Edward A Fisher
- Department of Medicine/Division of Cardiology, New York University Grossman School of Medicine, New York, NY, USA,Cardiovascular Research Center, New York University Grossman School of Medicine, New York, NY, USA
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9
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Tombor LS, Dimmeler S. Why is endothelial resilience key to maintain cardiac health? Basic Res Cardiol 2022; 117:35. [PMID: 35834003 PMCID: PMC9283358 DOI: 10.1007/s00395-022-00941-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 02/01/2023]
Abstract
Myocardial injury as induced by myocardial infarction results in tissue ischemia, which critically incepts cardiomyocyte death. Endothelial cells play a crucial role in restoring oxygen and nutrient supply to the heart. Latest advances in single-cell multi-omics, together with genetic lineage tracing, reveal a transcriptional and phenotypical adaptation to the injured microenvironment, which includes alterations in metabolic, mesenchymal, hematopoietic and pro-inflammatory signatures. The extent of transition in mesenchymal or hematopoietic cell lineages is still debated, but it is clear that several of the adaptive phenotypical changes are transient and endothelial cells revert back to a naïve cell state after resolution of injury responses. This resilience of endothelial cells to acute stress responses is important for preventing chronic dysfunction. Here, we summarize how endothelial cells adjust to injury and how this dynamic response contributes to repair and regeneration. We will highlight intrinsic and microenvironmental factors that contribute to endothelial cell resilience and may be targetable to maintain a functionally active, healthy microcirculation.
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Affiliation(s)
- Lukas S. Tombor
- Institute of Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany ,Faculty for Biological Sciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Stefanie Dimmeler
- Institute of Cardiovascular Regeneration, Goethe University Frankfurt, Frankfurt, Germany ,Faculty for Biological Sciences, Goethe University Frankfurt, Frankfurt, Germany
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10
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Dissecting the Complexity of Early Heart Progenitor Cells. J Cardiovasc Dev Dis 2021; 9:jcdd9010005. [PMID: 35050215 PMCID: PMC8779398 DOI: 10.3390/jcdd9010005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 12/23/2022] Open
Abstract
Early heart development depends on the coordinated participation of heterogeneous cell sources. As pioneer work from Adriana C. Gittenberger-de Groot demonstrated, characterizing these distinct cell sources helps us to understand congenital heart defects. Despite decades of research on the segregation of lineages that form the primitive heart tube, we are far from understanding its full complexity. Currently, single-cell approaches are providing an unprecedented level of detail on cellular heterogeneity, offering new opportunities to decipher its functional role. In this review, we will focus on three key aspects of early heart morphogenesis: First, the segregation of myocardial and endocardial lineages, which yields an early lineage diversification in cardiac development; second, the signaling cues driving differentiation in these progenitor cells; and third, the transcriptional heterogeneity of cardiomyocyte progenitors of the primitive heart tube. Finally, we discuss how single-cell transcriptomics and epigenomics, together with live imaging and functional analyses, will likely transform the way we delve into the complexity of cardiac development and its links with congenital defects.
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11
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Garnett ER, Raines RT. Emerging biological functions of ribonuclease 1 and angiogenin. Crit Rev Biochem Mol Biol 2021; 57:244-260. [PMID: 34886717 DOI: 10.1080/10409238.2021.2004577] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Pancreatic-type ribonucleases (ptRNases) are a large family of vertebrate-specific secretory endoribonucleases. These enzymes catalyze the degradation of many RNA substrates and thereby mediate a variety of biological functions. Though the homology of ptRNases has informed biochemical characterization and evolutionary analyses, the understanding of their biological roles is incomplete. Here, we review the functions of two ptRNases: RNase 1 and angiogenin. RNase 1, which is an abundant ptRNase with high catalytic activity, has newly discovered roles in inflammation and blood coagulation. Angiogenin, which promotes neovascularization, is now known to play roles in the progression of cancer and amyotrophic lateral sclerosis, as well as in the cellular stress response. Ongoing work is illuminating the biology of these and other ptRNases.
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Affiliation(s)
- Emily R Garnett
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Ronald T Raines
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
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12
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Kotlyarov S. Diversity of Lipid Function in Atherogenesis: A Focus on Endothelial Mechanobiology. Int J Mol Sci 2021; 22:11545. [PMID: 34768974 PMCID: PMC8584259 DOI: 10.3390/ijms222111545] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/12/2021] [Accepted: 10/21/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis is one of the most important problems in modern medicine. Its high prevalence and social significance determine the need for a better understanding of the mechanisms of the disease's development and progression. Lipid metabolism and its disorders are one of the key links in the pathogenesis of atherosclerosis. Lipids are involved in many processes, including those related to the mechanoreception of endothelial cells. The multifaceted role of lipids in endothelial mechanobiology and mechanisms of atherogenesis are discussed in this review. Endothelium is involved in ensuring adequate vascular hemodynamics, and changes in blood flow characteristics are detected by endothelial cells and affect their structure and function.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
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13
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Padilla S, Nurden AT, Prado R, Nurden P, Anitua E. Healing through the lens of immunothrombosis: Biology-inspired, evolution-tailored, and human-engineered biomimetic therapies. Biomaterials 2021; 279:121205. [PMID: 34710794 DOI: 10.1016/j.biomaterials.2021.121205] [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: 06/17/2021] [Revised: 09/30/2021] [Accepted: 10/20/2021] [Indexed: 12/14/2022]
Abstract
Evolution, from invertebrates to mammals, has yielded and shaped immunoclotting as a defense and repair response against trauma and infection. This mosaic of immediate and local wound-sealing and pathogen-killing mechanisms results in survival, restoration of homeostasis, and tissue repair. In mammals, immunoclotting has been complemented with the neuroendocrine system, platelets, and contact system among other embellishments, adding layers of complexity through interconnecting blood-born proteolytic cascades, blood cells, and the neuroendocrine system. In doing so, immunothrombosis endows humans with survival advantages, but entails vulnerabilities in the current unprecedented and increasingly challenging environment. Immunothrombosis and tissue repair appear to go hand in hand with common mechanisms mediating both processes, a fact that is underlined by recent advances that are deciphering the mechanisms of the repair process and of the biochemical pathways that underpins coagulation, hemostasis and thrombosis. This review is intended to frame both the universal aspects of tissue repair and the therapeutic use of autologous fibrin matrix as a biology-as-a-drug approach in the context of the evolutionary changes in coagulation and hemostasis. In addition, we will try to shed some light on the molecular mechanisms underlying the use of the autologous fibrin matrix as a biology-inspired, evolution-tailored, and human-engineered biomimetic therapy.
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Affiliation(s)
- Sabino Padilla
- Eduardo Anitua Foundation for Biomedical Research, Vitoria, Spain; BTI-Biotechnology Institute ImasD, Vitoria, Spain; University Institute for Regenerative Medicine & Oral Implantology - UIRMI (UPV/EHU-Fundación Eduardo Anitua), Vitoria, Spain.
| | - Alan T Nurden
- Institut Hospitalo-Universitaire LIRYC, Hôpital Xavier Arnozan, Pessac, France
| | - Roberto Prado
- Eduardo Anitua Foundation for Biomedical Research, Vitoria, Spain; BTI-Biotechnology Institute ImasD, Vitoria, Spain; University Institute for Regenerative Medicine & Oral Implantology - UIRMI (UPV/EHU-Fundación Eduardo Anitua), Vitoria, Spain
| | - Paquita Nurden
- Institut Hospitalo-Universitaire LIRYC, Hôpital Xavier Arnozan, Pessac, France
| | - Eduardo Anitua
- Eduardo Anitua Foundation for Biomedical Research, Vitoria, Spain; BTI-Biotechnology Institute ImasD, Vitoria, Spain; University Institute for Regenerative Medicine & Oral Implantology - UIRMI (UPV/EHU-Fundación Eduardo Anitua), Vitoria, Spain.
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14
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Fli1 + cells transcriptional analysis reveals an Lmo2-Prdm16 axis in angiogenesis. Proc Natl Acad Sci U S A 2021; 118:2008559118. [PMID: 34330825 DOI: 10.1073/pnas.2008559118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
A network of molecular factors drives the development, differentiation, and maintenance of endothelial cells. Friend leukemia integration 1 transcription factor (FLI1) is a bona fide marker of endothelial cells during early development. In zebrafish Tg( f li1:EGFP) y1 , we identified two endothelial cell populations, high-fli1 + and low-fli1 +, by the intensity of green fluorescent protein signal. By comparing RNA-sequencing analysis of non-fli1 expressing cells (fli1 -) with these two (fli1 +) cell populations, we identified several up-regulated genes, not previously recognized as important, during endothelial development. Compared with fli1 - and low-fli1 + cells, high-fli1 + cells showed up-regulated expression of the zinc finger transcription factor PRDI-BF1 and RIZ homology domain containing 16 (prdm16). Prdm16 knockdown (KD) by morpholino in the zebrafish larva was associated with impaired angiogenesis and increased number of low-fli1 + cells at the expense of high-fli1 + cells. In addition, PRDM16 KD in endothelial cells derived from human-induced pluripotent stem cells impaired their differentiation and migration in vitro. Moreover, zebrafish mutants (mut) with loss of function for the oncogene LIM domain only 2 (lmo2) also showed reduced prdm16 gene expression combined with impaired angiogenesis. Prdm16 expression was reduced further in endothelial (CD31+) cells compared with CD31- cells isolated from l mo2-mutants (l mo2-mut) embryos. Chromatin immunoprecipitation-PCR demonstrated that Lmo2 binds to the promoter and directly regulates the transcription of prdm16 This work unveils a mechanism by which prdm16 expression is activated in endothelial cells by Lmo2 and highlights a possible therapeutic pathway by which to modulate endothelial cell growth and repair.
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15
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Mandujano-Tinoco EA, Sultan E, Ottolenghi A, Gershoni-Yahalom O, Rosental B. Evolution of Cellular Immunity Effector Cells; Perspective on Cytotoxic and Phagocytic Cellular Lineages. Cells 2021; 10:1853. [PMID: 34440622 PMCID: PMC8394812 DOI: 10.3390/cells10081853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 07/19/2021] [Accepted: 07/20/2021] [Indexed: 12/14/2022] Open
Abstract
The immune system has evolved to protect organisms from infections caused by bacteria, viruses, and parasitic pathogens. In addition, it provides regenerative capacities, tissue maintenance, and self/non-self recognition of foreign tissues. Phagocytosis and cytotoxicity are two prominent cellular immune activities positioned at the base of immune effector function in mammals. Although these immune mechanisms have diversified into a wide heterogeneous repertoire of effector cells, it appears that they share some common cellular and molecular features in all animals, but also some interesting convergent mechanisms. In this review, we will explore the current knowledge about the evolution of phagocytic and cytotoxic immune lineages against pathogens, in the clearance of damaged cells, for regeneration, for histocompatibility recognition, and in killing virally infected cells. To this end, we give different immune examples of multicellular organism models, ranging from the roots of bilateral organisms to chordate invertebrates, comparing to vertebrates' lineages. In this review, we compare cellular lineage homologies at the cellular and molecular levels. We aim to highlight and discuss the diverse function plasticity within the evolved immune effector cells, and even suggest the costs and benefits that it may imply for organisms with the meaning of greater defense against pathogens but less ability to regenerate damaged tissues and organs.
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Affiliation(s)
- Edna Ayerim Mandujano-Tinoco
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, and Regenerative Medicine and Stem Cell Research Center, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; (E.S.); (A.O.); (O.G.-Y.)
- Laboratory of Connective Tissue, Centro Nacional de Investigación y Atención de Quemados, Instituto Nacional de Rehabilitación “Luis Guillermo Ibarra Ibarra”, Calzada Mexico-Xochimilco No. 289, Col. Arenal de Guadalupe, Tlalpan, Mexico City 14389, Mexico
| | - Eliya Sultan
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, and Regenerative Medicine and Stem Cell Research Center, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; (E.S.); (A.O.); (O.G.-Y.)
| | - Aner Ottolenghi
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, and Regenerative Medicine and Stem Cell Research Center, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; (E.S.); (A.O.); (O.G.-Y.)
| | - Orly Gershoni-Yahalom
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, and Regenerative Medicine and Stem Cell Research Center, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; (E.S.); (A.O.); (O.G.-Y.)
| | - Benyamin Rosental
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, and Regenerative Medicine and Stem Cell Research Center, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; (E.S.); (A.O.); (O.G.-Y.)
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16
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Evidence of anticipatory immune and hormonal responses to predation risk in an echinoderm. Sci Rep 2021; 11:10691. [PMID: 34021182 PMCID: PMC8139958 DOI: 10.1038/s41598-021-89805-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/30/2021] [Indexed: 11/08/2022] Open
Abstract
Recent efforts have been devoted to the link between responses to non-physical stressors and immune states in animals, mostly using human and other vertebrate models. Despite evolutionary relevance, comparatively limited work on the appraisal of predation risk and aspects of cognitive ecology and ecoimmunology has been carried out in non-chordate animals. The present study explored the capacity of holothuroid echinoderms to display an immune response to both reactive and anticipatory predatory stressors. Experimental trials and a mix of behavioural, cellular and hormonal markers were used, with a focus on coelomocytes (analogues of mammalian leukocytes), which are the main components of the echinoderm innate immunity. Findings suggest that holothuroids can not only appraise threatening cues (i.e. scent of a predator or alarm signals from injured conspecifics) but prepare themselves immunologically, presumably to cope more efficiently with potential future injuries. The responses share features with recently defined central emotional states and wane after prolonged stress in a manner akin to habituation, which are traits that have rarely been shown in non-vertebrates, and never in echinoderms. Because echinoderms sit alongside chordates in the deuterostome clade, such findings offer unique insights into the adaptive value and evolution of stress responses in animals.
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17
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Wang J, Sun H, Jiang M, Li J, Zhang P, Chen H, Mei Y, Fei L, Lai S, Han X, Song X, Xu S, Chen M, Ouyang H, Zhang D, Yuan GC, Guo G. Tracing cell-type evolution by cross-species comparison of cell atlases. Cell Rep 2021; 34:108803. [PMID: 33657376 DOI: 10.1016/j.celrep.2021.108803] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/13/2020] [Accepted: 02/08/2021] [Indexed: 01/11/2023] Open
Abstract
Cell types are the basic building units of multicellular life, with extensive diversities. The evolution of cell types is a crucial layer of comparative cell biology but is thus far not comprehensively studied. We define a compendium of cell atlases using single-cell RNA-seq (scRNA-seq) data from seven animal species and construct a cross-species cell-type evolutionary hierarchy. We present a roadmap for the origin and diversity of major cell categories and find that muscle and neuron cells are conserved cell types. Furthermore, we identify a cross-species transcription factor (TF) repertoire that specifies major cell categories. Overall, our study reveals conservation and divergence of cell types during animal evolution, which will further expand the landscape of comparative genomics.
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Affiliation(s)
- Jingjing Wang
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University Medical Center, 1369 West Wenyi Road, Hangzhou 311121, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China
| | - Huiyu Sun
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Mengmeng Jiang
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University Medical Center, 1369 West Wenyi Road, Hangzhou 311121, China
| | - Jiaqi Li
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Peijing Zhang
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University Medical Center, 1369 West Wenyi Road, Hangzhou 311121, China
| | - Haide Chen
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China
| | - Yuqing Mei
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Lijiang Fei
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Shujing Lai
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xiaoping Han
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China
| | - Xinhui Song
- Core Facilities, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Suhong Xu
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China
| | - Ming Chen
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hongwei Ouyang
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China
| | - Dan Zhang
- Department of Reproductive Endocrinology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
| | - Guo-Cheng Yuan
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.
| | - Guoji Guo
- Center for Stem Cell and Regenerative Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University Medical Center, 1369 West Wenyi Road, Hangzhou 311121, China; Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Hangzhou 310058, China; Institute of Hematology, Zhejiang University, Hangzhou 310058, China; Stem Cell Institute, Zhejiang University, Hangzhou 310058, China.
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18
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Endothelial Cells as Tools to Model Tissue Microenvironment in Hypoxia-Dependent Pathologies. Int J Mol Sci 2021; 22:ijms22020520. [PMID: 33430201 PMCID: PMC7825710 DOI: 10.3390/ijms22020520] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/27/2020] [Accepted: 01/05/2021] [Indexed: 12/11/2022] Open
Abstract
Endothelial cells (ECs) lining the blood vessels are important players in many biological phenomena but are crucial in hypoxia-dependent diseases where their deregulation contributes to pathology. On the other hand, processes mediated by ECs, such as angiogenesis, vessel permeability, interactions with cells and factors circulating in the blood, maintain homeostasis of the organism. Understanding the diversity and heterogeneity of ECs in different tissues and during various biological processes is crucial in biomedical research to properly develop our knowledge on many diseases, including cancer. Here, we review the most important aspects related to ECs’ heterogeneity and list the available in vitro tools to study different angiogenesis-related pathologies. We focus on the relationship between functions of ECs and their organo-specificity but also point to how the microenvironment, mainly hypoxia, shapes their activity. We believe that taking into account the specific features of ECs that are relevant to the object of the study (organ or disease state), especially in a simplified in vitro setting, is important to truly depict the biology of endothelium and its consequences. This is possible in many instances with the use of proper in vitro tools as alternative methods to animal testing.
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19
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Elsaid R, Soares-da-Silva F, Peixoto M, Amiri D, Mackowski N, Pereira P, Bandeira A, Cumano A. Hematopoiesis: A Layered Organization Across Chordate Species. Front Cell Dev Biol 2020; 8:606642. [PMID: 33392196 PMCID: PMC7772317 DOI: 10.3389/fcell.2020.606642] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022] Open
Abstract
The identification of distinct waves of progenitors during development, each corresponding to a specific time, space, and function, provided the basis for the concept of a "layered" organization in development. The concept of a layered hematopoiesis was established by classical embryology studies in birds and amphibians. Recent progress in generating reliable lineage tracing models together with transcriptional and proteomic analyses in single cells revealed that, also in mammals, the hematopoietic system evolves in successive waves of progenitors with distinct properties and fate. During embryogenesis, sequential waves of hematopoietic progenitors emerge at different anatomic sites, generating specific cell types with distinct functions and tissue homing capacities. The first progenitors originate in the yolk sac before the emergence of hematopoietic stem cells, some giving rise to progenies that persist throughout life. Hematopoietic stem cell-derived cells that protect organisms against environmental pathogens follow the same sequential strategy, with subsets of lymphoid cells being only produced during embryonic development. Growing evidence indicates that fetal immune cells contribute to the proper development of the organs they seed and later ensure life-long tissue homeostasis and immune protection. They include macrophages, mast cells, some γδ T cells, B-1 B cells, and innate lymphoid cells, which have "non-redundant" functions, and early perturbations in their development or function affect immunity in the adult. These observations challenged the view that all hematopoietic cells found in the adult result from constant and monotonous production from bone marrow-resident hematopoietic stem cells. In this review, we evaluate evidence for a layered hematopoietic system across species. We discuss mechanisms and selective pressures leading to the temporal generation of different cell types. We elaborate on the consequences of disturbing fetal immune cells on tissue homeostasis and immune development later in life.
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Affiliation(s)
- Ramy Elsaid
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
| | - Francisca Soares-da-Silva
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
- I3S—Instituto de Investigação e Inovação em Saúde and INEB—Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- Graduate Program in Areas of Basic and Applied Biology, Instituto de Ciências Biomeìdicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Marcia Peixoto
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
- I3S—Instituto de Investigação e Inovação em Saúde and INEB—Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Dali Amiri
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
| | - Nathan Mackowski
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
| | - Pablo Pereira
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
| | - Antonio Bandeira
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
| | - Ana Cumano
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France
- INSERM U1223, Paris, France
- Université de Paris, Céllule Pasteur, Paris, France
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20
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Coelomocyte replenishment in adult Asterias rubens: the possible ways. Cell Tissue Res 2020; 383:1043-1060. [PMID: 33237478 DOI: 10.1007/s00441-020-03337-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 11/05/2020] [Indexed: 10/22/2022]
Abstract
The origin of cells involved in regeneration in echinoderms remains an open question. Replenishment of circulatory coelomocytes-cells of the coelomic cavity in starfish-is an example of physiological regeneration. The coelomic epithelium is considered to be the main source of coelomocytes, but many details of this process remain unclear. This study examined the role of coelomocytes outside circulation, named marginal coelomocytes and small undifferentiated cells of the coelomic epithelium in coelomocyte replenishment in Asterias rubens. A qualitative and quantitative comparison of circulatory and marginal coelomocytes, as well as changes of circulatory coelomocyte concentrations in response to injury at different physiological statuses, was analysed. The presence of cells morphologically similar to coelomocytes in the context of coelomic epithelium was evaluated by electron microscopy. The irregular distribution of small cells on the surface and within the coelomic epithelium was demonstrated and the origin of small undifferentiated cells and large agranulocytes from the coelomic epithelium was suggested. Two events have been proposed to mediate the replenishment of coelomocytes in the coelom: migration of mature coelomocytes of the marginal cell pool and migration of small undifferentiated cells of the coelomic epithelium. The proteomic analysis of circulatory coelomocytes, coelomic epithelial cells and a subpopulation of coelomic epithelial cells, enriched in small undifferentiated cells, revealed proteins that were common and specific for each cell pool. Among these molecules were regulatory proteins, potential participants of regenerative processes.
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21
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Tang VW. Collagen, stiffness, and adhesion: the evolutionary basis of vertebrate mechanobiology. Mol Biol Cell 2020; 31:1823-1834. [PMID: 32730166 PMCID: PMC7525820 DOI: 10.1091/mbc.e19-12-0709] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/11/2020] [Accepted: 05/28/2020] [Indexed: 01/09/2023] Open
Abstract
The emergence of collagen I in vertebrates resulted in a dramatic increase in the stiffness of the extracellular environment, supporting long-range force propagation and the development of low-compliant tissues necessary for the development of vertebrate traits including pressurized circulation and renal filtration. Vertebrates have also evolved integrins that can bind to collagens, resulting in the generation of higher tension and more efficient force transmission in the extracellular matrix. The stiffer environment provides an opportunity for the vertebrates to create new structures such as the stress fibers, new cell types such as endothelial cells, new developmental processes such as neural crest delamination, and new tissue organizations such as the blood-brain barrier. Molecular players found only in vertebrates allow the modification of conserved mechanisms as well as the design of novel strategies that can better serve the physiological needs of the vertebrates. These innovations collectively contribute to novel morphogenetic behaviors and unprecedented increases in the complexities of tissue mechanics and functions.
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Affiliation(s)
- Vivian W. Tang
- Department of Cell and Developmental Biology, University of Illinois, Urbana–Champaign, Urbana, IL 61801
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22
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Díaz del Moral S, Barrena S, Muñoz-Chápuli R, Carmona R. Embryonic circulating endothelial progenitor cells. Angiogenesis 2020; 23:531-541. [DOI: 10.1007/s10456-020-09732-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/22/2020] [Indexed: 12/26/2022]
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23
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Abstract
The lateral plate mesoderm (LPM) forms the progenitor cells that constitute the heart and cardiovascular system, blood, kidneys, smooth muscle lineage and limb skeleton in the developing vertebrate embryo. Despite this central role in development and evolution, the LPM remains challenging to study and to delineate, owing to its lineage complexity and lack of a concise genetic definition. Here, we outline the processes that govern LPM specification, organization, its cell fates and the inferred evolutionary trajectories of LPM-derived tissues. Finally, we discuss the development of seemingly disparate organ systems that share a common LPM origin. Summary: The lateral plate mesoderm is the origin of several major cell types and organ systems in the vertebrate body plan. How this mesoderm territory emerges and partitions into its downstream fates provides clues about vertebrate development and evolution.
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Affiliation(s)
- Karin D Prummel
- University of Colorado School of Medicine, Anschutz Medical Campus, Department of Pediatrics, Section of Developmental Biology, 12801 E 17th Avenue, Aurora, CO 80045, USA.,Department of Molecular Life Sciences, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Susan Nieuwenhuize
- University of Colorado School of Medicine, Anschutz Medical Campus, Department of Pediatrics, Section of Developmental Biology, 12801 E 17th Avenue, Aurora, CO 80045, USA.,Department of Molecular Life Sciences, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Christian Mosimann
- University of Colorado School of Medicine, Anschutz Medical Campus, Department of Pediatrics, Section of Developmental Biology, 12801 E 17th Avenue, Aurora, CO 80045, USA .,Department of Molecular Life Sciences, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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24
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Borasch K, Richardson K, Plendl J. Cardiogenesis with a focus on vasculogenesis and angiogenesis. Anat Histol Embryol 2020; 49:643-655. [PMID: 32319704 DOI: 10.1111/ahe.12549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 02/04/2020] [Accepted: 02/20/2020] [Indexed: 12/21/2022]
Abstract
The initial intraembryonic vasculogenesis occurs in the cardiogenic mesoderm. Here, a cell population of proendocardial cells detaches from the mesoderm that subsequently generates the single endocardial tube by forming vascular plexuses. In the course of embryogenesis, the endocardium retains vasculogenic, angiogenic and haematopoietic potential. The coronary blood vessels that sustain the rapidly expanding myocardium develop in the course of the formation of the cardiac loop by vasculogenesis and angiogenesis from progenitor cells of the proepicardial serosa at the venous pole of the heart as well as from the endocardium and endothelial cells of the sinus venosus. Prospective coronary endothelial cells and progenitor cells of the coronary blood vessel walls (smooth muscle cells, perivascular cells) originate from different cell populations that are in close spatial as well as regulatory connection with each other. Vasculo- and angiogenesis of the coronary blood vessels are for a large part regulated by the epicardium and epicardium-derived cells. Vasculogenic and angiogenic signalling pathways include the vascular endothelial growth factors, the angiopoietins and the fibroblast growth factors and their receptors.
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Affiliation(s)
- Katrin Borasch
- Department of Veterinary Medicine, Institute of Veterinary Anatomy, Freie University Berlin, Berlin, Germany
| | - Kenneth Richardson
- College of Veterinary Medicine, School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Johanna Plendl
- Department of Veterinary Medicine, Institute of Veterinary Anatomy, Freie University Berlin, Berlin, Germany
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25
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Hernroth B, Tassidis H, Baden SP. Immunosuppression of aquatic organisms exposed to elevated levels of manganese: From global to molecular perspective. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 104:103536. [PMID: 31705914 DOI: 10.1016/j.dci.2019.103536] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/03/2019] [Indexed: 06/10/2023]
Abstract
Manganese (Mn) is an essential trace metal for all organisms. However, in excess it causes toxic effects but the impact on aquatic environments has so far been highly overlooked. Manganese is abundant both in costal and deep sea sediments and becomes bioavailable (Mn2+) during redox conditions. This is an increasing phenomenon due to eutrophication-induced hypoxia and aggravated through the ongoing climate change. Intracellular accumulation of Mn2+ causes oxidative stress and activates evolutionary conserved pathways inducing apoptosis and cell cycle arrest. Here, studies are compiled on how excess of dissolved Mn suppresses the immune system of various aquatic organisms by adversely affecting both renewal of immunocytes and their functionality, such as phagocytosis and activation of pro-phenoloxidase. These impairments decrease the animal's bacteriostatic capacity, indicating higher susceptibility to infections. Increased distribution of pathogens, which is believed to accompany climate change, requires preserved immune sentinel functions and Mn can be crucial for the outcome of host-pathogen interactions.
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Affiliation(s)
- Bodil Hernroth
- Department of Natural Science, Kristianstad University, SE-291 88, Kristianstad, Sweden; The Royal Swedish Academy of Sciences, Kristineberg Marine Research Station, SE-450 34, Fiskebäckskil, Sweden.
| | - Helena Tassidis
- Department of Natural Science, Kristianstad University, SE-291 88, Kristianstad, Sweden
| | - Susanne P Baden
- Department of Biological and Environmental Sciences, University of Gothenburg, Kristineberg Marine Research Station, SE-45034, Fiskebäckskil, Sweden
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26
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Rosental B, Raveh T, Voskoboynik A, Weissman IL. Evolutionary perspective on the hematopoietic system through a colonial chordate: allogeneic immunity and hematopoiesis. Curr Opin Immunol 2020; 62:91-98. [PMID: 31954962 PMCID: PMC7136747 DOI: 10.1016/j.coi.2019.12.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 12/16/2019] [Indexed: 01/27/2023]
Abstract
Evolution and selection have shaped diverse immune systems throughout phylogeny, the vast majority of which remain unexplored. Botryllus schlosseri is a colonial tunicate, a sister group to vertebrates, that develops as a chordate, then metamorphoses to an asexually reproductive invertebrate that every week makes the same body plan from budded stem cells. Genetically distinct B. schlosseri colonies can fuse to form a chimera, or reject each other based on allogeneic recognition. In chimeras, circulating germline and somatic stem cells participate in development; stem cells compete in all individuals in the fused colonies, with rejection preventing germline parasitism. Here we review the isolation and characterization of B. schlosseri hematopoietic stem cells (HSC) and their niches, and the role of the immune effector cells in allorecognition.
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Affiliation(s)
- Benyamin Rosental
- Ben Gurion University of the Negev, The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Regenerative Medicine and Stem Cell Research Center, P.O.B. 653 Beer-Sheva, Israel.
| | - Tal Raveh
- Institute for Stem Cell Biology and Regenerative Medicine, and Ludwig Center for Cancer Stem Cell Research, Stanford University School of Medicine, CA, USA
| | - Ayelet Voskoboynik
- Institute for Stem Cell Biology and Regenerative Medicine, and Ludwig Center for Cancer Stem Cell Research, Stanford University School of Medicine, CA, USA; Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA; Chan Zuckerberg Biohub, San Francisco CA 94158, USA.
| | - Irving L Weissman
- Institute for Stem Cell Biology and Regenerative Medicine, and Ludwig Center for Cancer Stem Cell Research, Stanford University School of Medicine, CA, USA; Hopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA; Chan Zuckerberg Biohub, San Francisco CA 94158, USA.
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Jiménez-Merino J, Santos de Abreu I, Hiebert LS, Allodi S, Tiozzo S, De Barros CM, Brown FD. Putative stem cells in the hemolymph and in the intestinal submucosa of the solitary ascidian Styela plicata. EvoDevo 2019; 10:31. [PMID: 31788180 PMCID: PMC6876114 DOI: 10.1186/s13227-019-0144-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 11/02/2019] [Indexed: 12/28/2022] Open
Abstract
Background In various ascidian species, circulating stem cells have been documented to be involved in asexual reproduction and whole-body regeneration. Studies of these cell population(s) are mainly restricted to colonial species. Here, we investigate the occurrence of circulating stem cells in the solitary Styela plicata, a member of the Styelidae, a family with at least two independent origins of coloniality. Results Using flow cytometry, we characterized a population of circulating putative stem cells (CPSCs) in S. plicata and determined two gates likely enriched with CPSCs based on morphology and aldehyde dehydrogenase (ALDH) activity. We found an ALDH + cell population with low granularity, suggesting a stem-like state. In an attempt to uncover putative CPSCs niches in S. plicata, we performed a histological survey for hemoblast-like cells, followed by immunohistochemistry with stem cell and proliferation markers. The intestinal submucosa (IS) showed high cellular proliferation levels and high frequency of undifferentiated cells and histological and ultrastructural analyses revealed the presence of hemoblast aggregations in the IS suggesting a possible niche. Finally, we document the first ontogenetic appearance of distinct metamorphic circulatory mesenchyme cells, which precedes the emergence of juvenile hemocytes. Conclusions We find CPSCs in the hemolymph of the solitary ascidian Styela plicata, presumably involved in the regenerative capacity of this species. The presence of proliferating and undifferentiated mesenchymal cells suggests IS as a possible niche.
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Affiliation(s)
- Juan Jiménez-Merino
- 1Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Trav. 14, São Paulo, SP 101 05508-090 Brazil.,2Centro de Biologia Marinha (CEBIMar), Universidade de São Paulo, São Paulo, Brazil
| | - Isadora Santos de Abreu
- 3Laboratório de Neurobiologia Comparativa e do Desenvolvimento, Pós-Graduação em Ciências Biológicas-Fisiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ Brazil.,4Pós-Graduação em Ciências Morfológicas, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ Brazil
| | - Laurel S Hiebert
- 1Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Trav. 14, São Paulo, SP 101 05508-090 Brazil.,2Centro de Biologia Marinha (CEBIMar), Universidade de São Paulo, São Paulo, Brazil
| | - Silvana Allodi
- 3Laboratório de Neurobiologia Comparativa e do Desenvolvimento, Pós-Graduação em Ciências Biológicas-Fisiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ Brazil.,4Pós-Graduação em Ciências Morfológicas, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ Brazil
| | - Stefano Tiozzo
- 5CNRS, Laboratoire de Biologie du Développement de Villefranche-sur-mer (LBDV), Sorbonne Universités, 06230 Paris, France
| | - Cintia M De Barros
- 6Laboratório Integrado de Morfologia, Núcleo em Ecologia e Desenvolvimento Sócio Ambiental de Macaé, NUPEM, Universidade Federal do Rio de Janeiro, UFRJ, Macae, RJ Brazil
| | - Federico D Brown
- 1Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Trav. 14, São Paulo, SP 101 05508-090 Brazil.,2Centro de Biologia Marinha (CEBIMar), Universidade de São Paulo, São Paulo, Brazil.,Instituto Nacional de Ciência e Tecnologia em Estudos Interdisciplinares e Transdisciplinares em Ecologia e Evolução (IN-TREE), Salvador, BA Brazil
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Rodriguez D, Nourizadeh S, De Tomaso AW. The biology of the extracorporeal vasculature of Botryllus schlosseri. Dev Biol 2019; 448:309-319. [PMID: 30760410 DOI: 10.1016/j.ydbio.2018.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 09/29/2018] [Accepted: 10/17/2018] [Indexed: 02/08/2023]
Abstract
The extracorporeal vasculature of the colonial ascidian Botryllus schlosseri plays a key role in several biological processes: transporting blood, angiogenesis, regeneration, self-nonself recognition, and parabiosis. The vasculature also interconnects all individuals in a colony and is composed of a single layer of ectodermally-derived cells. These cells form a tube with the basal lamina facing the lumen, and the apical side facing an extracellular matrix that consists of cellulose and other proteins, known as the tunic. Vascular tissue is transparent and can cover several square centimeters, which is much larger than any single individual within the colony. It forms a network that ramifies and expands to the perimeter of each colony and terminates into oval-shaped protrusions known as ampullae. Botryllus individuals replace themselves through a weekly budding cycle, and vasculature is added to ensure the interconnection of each new individual, thus there is continuous angiogenesis occurring naturally. The vascular tissue itself is highly regenerative; surgical removal of the ampullae and peripheral vasculature triggers regrowth within 24-48 h, which includes forming new ampullae. When two individuals, whether in the wild or in the lab, come into close contact and their ampullae touch, they can either undergo parabiosis through anastomosing vessels, or reject vascular fusion. The vasculature is easily manipulated by direct means such as microinjections, microsurgeries, and pharmacological reagents. Its transparent nature allows for in vivo analysis by bright field and fluorescence microscopy. Here we review the techniques and approaches developed to study the different biological processes that involve the extracorporeal vasculature.
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Affiliation(s)
- Delany Rodriguez
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
| | - Shane Nourizadeh
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA
| | - Anthony W De Tomaso
- Department of Molecular, Cellular, and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA
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Huminiecki L. Magic roundabout is an endothelial-specific ohnolog of ROBO1 which neo-functionalized to an essential new role in angiogenesis. PLoS One 2019; 14:e0208952. [PMID: 30802244 PMCID: PMC6389290 DOI: 10.1371/journal.pone.0208952] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/26/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Magic roundabout (ROBO4) is an unusual endothelial-specific paralog of the family of neuronally-expressed axon guidance receptors called roundabouts. Endothelial cells (ECs), whose uninterrupted sheet delimits the lumen of all vertebrate blood vessels and which are absent from invertebrate species, are a vertebrate-specific evolutionary novelty. RESULTS Herein, the evolutionary mechanism of the duplication, retention and divergence of ROBO4 was investigated for the first time. Phylogenetic analyses carried out suggested that ROBO4 is a fast-evolving paralog of ROBO1 formed at the base of vertebrates. The ancestral expression pattern was neuronal. ROBO4 dramatically shifted its expression and became exceptionally specific to ECs. The data-mining of FANTOM5 and ENCODE reveals that ROBO4's endothelial expression arises from a single transcription start site (TSS), conserved in mouse, controlled by a proximal promoter with a complex architecture suggestive of regulatory neo-functionalization. (An analysis of promoter probabilities suggested the architecture was not due to a chance arrangement of TFBSes). Further evidence for the neo-functionalization of ROBO4 comes from the analysis of its protein interactions, the rates of protein evolution, and of positively selected sites. CONCLUSIONS The neo-functionalization model explains why ROBO4 protein acquired new context-specific biological functions in the control of angiogenesis. This endothelial-specific roundabout receptor is an illustrative example of the emergence of an essential vertebrate molecular novelty and an endothelial-specific signaling sub-network through 2R-WGD. The emergence of novel cell types, such as ECs, might be a neglected evolutionary force contributing to the high rate of retention of duplicates post-2R-WGD. Crucially, expression neo-functionalization to evolutionarily novel sites of expression conceptually extends the classical model of neo-functionalization.
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Affiliation(s)
- Lukasz Huminiecki
- Instytut Genetyki i Hodowli Zwierząt Polskiej Akademii Nauk, Jastrzębiec, Magdalenka, Poland
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Li Q, Ren Y, Luan L, Zhang J, Qiao G, Wang Y, Ye S, Li R. Localization and characterization of hematopoietic tissues in adult sea cucumber, Apostichopus japonicus. FISH & SHELLFISH IMMUNOLOGY 2019; 84:1-7. [PMID: 30253179 DOI: 10.1016/j.fsi.2018.09.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 06/08/2023]
Abstract
Sea cucumber Apostichopus japonicus rely on the efficient innate immune mechanisms against invaders, in which the consumption and regeneration of coelomocytes take place at the same time. In the present study, histological features of putative hematopoietic tissues (HPTs) including the rete mirabile, the respiratory tree, the polian vesicle and the coelomic epithelium were characterized. The distribution of transcription factor GATA1 in coelomocytes and putative HPTs was examined by immunohistochemistry. In addition, cell proliferation using EdU labeling and coelomocyte distribution in different tissues using monoclonal antibody labeling were analyzed to further confirm the HPTs. The results showed that two homologs of GATA1 were detected with molecular weight of 43 and 90 kDa in coelomocytes, rete mirabile, respiratory tree and polian vesicle, whereas no signals were detected in the coelomic epithelium. A few cells were detected to be EdU-positive for coelomocytes, which accounted for approximately 9.5%. In the rete mirabile and the respiratory tree, the EdU signals were strong in cells of the tube wall. In the polian vesicle, numerous EdU-positive cells were detected in the cyst wall. In the coelomic epithelium, little EdU signaling was detected. Immunohistochemistry analysis by mAb 3F6 against A. japonicus coelomocytes showed that positive signals were observed in the tube wall of the rete mirabile, respiratory tree, cyst wall of the polian vesicle and in the coelomocyte antrum of coelomic epithelium. These results suggest that the rete mirabile, respiratory tree and polian vesicle are the HPTs of A. japonicus.
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Affiliation(s)
- Qiang Li
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Yuan Ren
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China; Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, 116023, China
| | - Linlin Luan
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China; Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, 116023, China
| | - Jialin Zhang
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Guo Qiao
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Yinan Wang
- Department of Ocean Technology, College of Marine and Biology Engineering, Yancheng Institute of Technology, Yancheng, 224051, China
| | - Shigen Ye
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, 116023, China
| | - Ruijun Li
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian, 116023, China.
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Rosental B, Kowarsky M, Seita J, Corey DM, Ishizuka KJ, Palmeri KJ, Chen SY, Sinha R, Okamoto J, Mantalas G, Manni L, Raveh T, Clarke DN, Tsai JM, Newman AM, Neff NF, Nolan GP, Quake SR, Weissman IL, Voskoboynik A. Complex mammalian-like haematopoietic system found in a colonial chordate. Nature 2018; 564:425-429. [PMID: 30518860 PMCID: PMC6347970 DOI: 10.1038/s41586-018-0783-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 10/15/2018] [Indexed: 12/11/2022]
Abstract
Haematopoiesis is an essential process that evolved in multicellular animals. At the heart of this process are haematopoietic stem cells (HSCs), which are multipotent and self-renewing, and generate the entire repertoire of blood and immune cells throughout an animal's life1. Although there have been comprehensive studies on self-renewal, differentiation, physiological regulation and niche occupation in vertebrate HSCs, relatively little is known about the evolutionary origin and niches of these cells. Here we describe the haematopoietic system of Botryllus schlosseri, a colonial tunicate that has a vasculature and circulating blood cells, and interesting stem-cell biology and immunity characteristics2-8. Self-recognition between genetically compatible B. schlosseri colonies leads to the formation of natural parabionts with shared circulation, whereas incompatible colonies reject each other3,4,7. Using flow cytometry, whole-transcriptome sequencing of defined cell populations and diverse functional assays, we identify HSCs, progenitors, immune effector cells and an HSC niche, and demonstrate that self-recognition inhibits allospecific cytotoxic reactions. Our results show that HSC and myeloid lineage immune cells emerged in a common ancestor of tunicates and vertebrates, and also suggest that haematopoietic bone marrow and the B. schlosseri endostyle niche evolved from a common origin.
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Affiliation(s)
- Benyamin Rosental
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA.
| | - Mark Kowarsky
- Department of Physics, Stanford University, Stanford, CA, USA
| | - Jun Seita
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
- AI based Healthcare and Medical Data Analysis Standardization Unit, Medical Sciences Innovation Hub Program, RIKEN, Tokyo, Japan
| | - Daniel M Corey
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Katherine J Ishizuka
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA
| | - Karla J Palmeri
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA
| | - Shih-Yu Chen
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA
| | - Rahul Sinha
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Gary Mantalas
- Department of Bioengineering, Stanford University, Stanford, CA, USA
- Department of Molecular Cellular and Developmental Biology, University of California Santa Cruz, Santa Cruz, CA, USA
| | - Lucia Manni
- Dipartimento di Biologia, Università degli Studi di Padova, Padova, Italy
| | - Tal Raveh
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - D Nathaniel Clarke
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA
| | - Jonathan M Tsai
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Aaron M Newman
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Garry P Nolan
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA
| | - Stephen R Quake
- Chan Zuckerberg Biohub, San Francisco, CA, USA
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Irving L Weissman
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA.
- Ludwig Center for Cancer Stem Cell Research and Medicine, Stanford University School of Medicine, Stanford, CA, USA.
| | - Ayelet Voskoboynik
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA, USA.
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Hansen NW, Hansen AJ, Sams A. The endothelial border to health: Mechanistic evidence of the hyperglycemic culprit of inflammatory disease acceleration. IUBMB Life 2017; 69:148-161. [PMID: 28230336 DOI: 10.1002/iub.1610] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 01/21/2017] [Indexed: 02/06/2023]
Abstract
The endothelial cell (EC) layer constitutes a barrier that controls movements of fluid, solutes and cells between blood and tissue. Further, the endothelial layer regulates vascular tone and directs local humoral and cellular inflammatory processes. The strategic position makes it an important player for maintenance of health and for development of a number of diseases. Endothelial dysfunction is known to be an important component of type 2 diabetes, but is also assumed to be involved in many other diseases, for example, rheumatoid arthritis, inflammatory bowel disease, asthma, and cardiovascular diseases. We here suggest that the EC plays a pivotal role in disease pathophysiology through initiation, potentiation, and maintenance of several inflammatory mechanisms. Our contention is based on the observation that hyperglycemia-intermittent or sustained, local or systemic-is a major culprit for several endothelial dysfunctions. There is also mounting epidemiological evidence that dietary intake of refined sugars is important for the development of a number of diseases beyond obesity and type 2 diabetes. Various diseases involving inflammatory and immunological components are accelerated by hyperglycemic events because the endothelium transduces "high glucose" signaling into significant pathophysiological phenomena leading to reduced endothelial barrier function, compromised vascular tone regulation and inflammation (e.g., cytokine secretion and RAGE activation). In addition, endothelial extracellular proteins form epitopes for potential specific antibody formation upon interactions with reducing sugars. This paper reviews the endothelial metabolism, biology, inflammatory processes, physical barrier functions, and summarizes evidence that although stochastic in nature, endothelial responses to hyperglycemia are major contributors to disease pathophysiology. We present molecular and mechanistic evidence that both biological and physical barriers, protein function, specific immunity, and inflammatory processes are compromised by hyperglycemic events and thus, hyperglycemic events alone should be considered risk factors for numerous human diseases. © 2017 IUBMB Life, 69(3):148-161, 2017.
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Affiliation(s)
- Nina Waerling Hansen
- Department of Endocrinology (Diabetes and Metabolism), Rigshospitalet, Copenhagen, Denmark
| | - Anker Jon Hansen
- Center for Basic and Translational Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - Anette Sams
- Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital, Rigshospitalet, Glostrup, Denmark
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Snuderl M, Zhang G, Wu P, Jennings TS, Shroff S, Ortenzi V, Jain R, Cohen B, Reidy JJ, Dushay MS, Wisoff JH, Harter DH, Karajannis MA, Fenyo D, Neubert TA, Zagzag D. Endothelium-Independent Primitive Myxoid Vascularization Creates Invertebrate-Like Channels to Maintain Blood Supply in Optic Gliomas. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:1867-1878. [PMID: 28606795 PMCID: PMC5530906 DOI: 10.1016/j.ajpath.2017.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/07/2017] [Accepted: 04/18/2017] [Indexed: 12/14/2022]
Abstract
Optic gliomas are brain tumors characterized by slow growth, progressive loss of vision, and limited therapeutic options. Optic gliomas contain various amounts of myxoid matrix, which can represent most of the tumor mass. We sought to investigate biological function and protein structure of the myxoid matrix in optic gliomas to identify novel therapeutic targets. We reviewed histological features and clinical imaging properties, analyzed vasculature by immunohistochemistry and electron microscopy, and performed liquid chromatography-mass spectrometry on optic gliomas, which varied in the amount of myxoid matrix. We found that although subtypes of optic gliomas are indistinguishable on imaging, the microvascular network of pilomyxoid astrocytoma, a subtype of optic glioma with abundant myxoid matrix, is characterized by the presence of endothelium-free channels in the myxoid matrix. These tumors show normal perfusion by clinical imaging and lack histological evidence of hemorrhage organization or thrombosis. The myxoid matrix is composed predominantly of the proteoglycan versican and its linking protein, a vertebrate hyaluronan and proteoglycan link protein 1. We propose that pediatric optic gliomas can maintain blood supply without endothelial cells by using invertebrate-like channels, which we termed primitive myxoid vascularization. Enzymatic targeting of the proteoglycan versican/hyaluronan and proteoglycan link protein 1 rich myxoid matrix, which is in direct contact with circulating blood, can provide novel therapeutic avenues for optic gliomas of childhood.
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Affiliation(s)
- Matija Snuderl
- Division of Neuropathology, Department of Pathology, New York University Langone Medical Center and Medical School, New York, New York; Department of Neurology, New York University Langone Medical Center and Medical School, New York, New York
| | - Guoan Zhang
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York; Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, New York
| | - Pamela Wu
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York; Institute of Systems Genetics, New York University Langone Medical Center, New York, New York
| | - Tara S Jennings
- Division of Neuropathology, Department of Pathology, New York University Langone Medical Center and Medical School, New York, New York
| | - Seema Shroff
- Division of Neuropathology, Department of Pathology, New York University Langone Medical Center and Medical School, New York, New York
| | - Valerio Ortenzi
- Division of Neuropathology, Department of Pathology, New York University Langone Medical Center and Medical School, New York, New York
| | - Rajan Jain
- Department of Radiology, New York University Langone Medical Center and Medical School, New York, New York; Department of Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York
| | - Benjamin Cohen
- Department of Radiology, New York University Langone Medical Center and Medical School, New York, New York
| | - Jason J Reidy
- Department of Pathology, Mount Sinai Beth Israel Medical Center, New York, New York
| | | | - Jeffrey H Wisoff
- Department of Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York; Division of Pediatric Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York
| | - David H Harter
- Department of Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York; Division of Pediatric Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York
| | - Matthias A Karajannis
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Otolaryngology, New York University Langone Medical Center and Perlmutter Cancer Center, New York, New York
| | - David Fenyo
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York; Institute of Systems Genetics, New York University Langone Medical Center, New York, New York
| | - Thomas A Neubert
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, New York; Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, New York
| | - David Zagzag
- Division of Neuropathology, Department of Pathology, New York University Langone Medical Center and Medical School, New York, New York; Department of Neurosurgery, New York University Langone Medical Center and Medical School, New York, New York; Microvascular and Molecular Neurooncology Laboratory, Department of Pathology, New York University Langone Medical Center, New York, New York.
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Crossley DA, Burggren WW, Reiber CL, Altimiras J, Rodnick KJ. Mass Transport: Circulatory System with Emphasis on Nonendothermic Species. Compr Physiol 2016; 7:17-66. [PMID: 28134997 DOI: 10.1002/cphy.c150010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mass transport can be generally defined as movement of material matter. The circulatory system then is a biological example given its role in the movement in transporting gases, nutrients, wastes, and chemical signals. Comparative physiology has a long history of providing new insights and advancing our understanding of circulatory mass transport across a wide array of circulatory systems. Here we focus on circulatory function of nonmodel species. Invertebrates possess diverse convection systems; that at the most complex generate pressures and perform at a level comparable to vertebrates. Many invertebrates actively modulate cardiovascular function using neuronal, neurohormonal, and skeletal muscle activity. In vertebrates, our understanding of cardiac morphology, cardiomyocyte function, and contractile protein regulation by Ca2+ highlights a high degree of conservation, but differences between species exist and are coupled to variable environments and body temperatures. Key regulators of vertebrate cardiac function and systemic blood pressure include the autonomic nervous system, hormones, and ventricular filling. Further chemical factors regulating cardiovascular function include adenosine, natriuretic peptides, arginine vasotocin, endothelin 1, bradykinin, histamine, nitric oxide, and hydrogen sulfide, to name but a few. Diverse vascular morphologies and the regulation of blood flow in the coronary and cerebral circulations are also apparent in nonmammalian species. Dynamic adjustments of cardiovascular function are associated with exercise on land, flying at high altitude, prolonged dives by marine mammals, and unique morphology, such as the giraffe. Future studies should address limits of gas exchange and convective transport, the evolution of high arterial pressure across diverse taxa, and the importance of the cardiovascular system adaptations to extreme environments. © 2017 American Physiological Society. Compr Physiol 7:17-66, 2017.
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Affiliation(s)
- Dane A Crossley
- Department of Biological Sciences, University of North Texas, Denton, Texas, USA
| | - Warren W Burggren
- Department of Biological Sciences, University of North Texas, Denton, Texas, USA
| | - Carl L Reiber
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, Nevada, USA
| | - Jordi Altimiras
- AVIAN Behavioral Genomics and Physiology, IFM Biology, Linköping University, Linköping, Sweden
| | - Kenneth J Rodnick
- Department of Biological Sciences, Idaho State University, Pocatello, Idaho, USA
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Nerve-granular cell communication in the atrium of the snail Achatina achatina occurs via the cardioexcitatory transmitters serotonin and FMRFamide. Cell Tissue Res 2016; 366:245-254. [PMID: 27660155 DOI: 10.1007/s00441-016-2483-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
Abstract
In the present study, the anatomical association and functional interaction between nerve fibres and granular cells in the atrium of the snail Achatina achatina are investigated using a combination of scanning electron microscopy (SEM), pharmacological and immunofluorescence techniques. The SEM studies support a close anatomical association of axons with granular cells and new features of surface morphology are revealed. Pharmacological experiments showed that both serotonin and FMRFamide were able to induce degranulation of granular cells and the release of cysteine-rich atrial secretory protein. Serotonin- and FMRFamide-immunoreactive nerve fibres were observed at variable distances from granular cells, ranging from close contact to distances as far as the diameter of a muscle bundle. These results suggest that serotonin and FMRFamide play a role as paracrine excitatory transmitters in nerve-to-granular cell communication.
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Pleyer L, Valent P, Greil R. Mesenchymal Stem and Progenitor Cells in Normal and Dysplastic Hematopoiesis-Masters of Survival and Clonality? Int J Mol Sci 2016; 17:ijms17071009. [PMID: 27355944 PMCID: PMC4964385 DOI: 10.3390/ijms17071009] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 05/20/2016] [Accepted: 06/08/2016] [Indexed: 02/07/2023] Open
Abstract
Myelodysplastic syndromes (MDS) are malignant hematopoietic stem cell disorders that have the capacity to progress to acute myeloid leukemia (AML). Accumulating evidence suggests that the altered bone marrow (BM) microenvironment in general, and in particular the components of the stem cell niche, including mesenchymal stem cells (MSCs) and their progeny, play a pivotal role in the evolution and propagation of MDS. We here present an overview of the role of MSCs in the pathogenesis of MDS, with emphasis on cellular interactions in the BM microenvironment and related stem cell niche concepts. MSCs have potent immunomodulatory capacities and communicate with diverse immune cells, but also interact with various other cellular components of the microenvironment as well as with normal and leukemic stem and progenitor cells. Moreover, compared to normal MSCs, MSCs in MDS and AML often exhibit altered gene expression profiles, an aberrant phenotype, and abnormal functional properties. These alterations supposedly contribute to the “reprogramming” of the stem cell niche into a disease-permissive microenvironment where an altered immune system, abnormal stem cell niche interactions, and an impaired growth control lead to disease progression. The current article also reviews molecular targets that play a role in such cellular interactions and possibilities to interfere with abnormal stem cell niche interactions by using specific targeted drugs.
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Affiliation(s)
- Lisa Pleyer
- 3rd Medical Department with Hematology and Medical Oncology, Hemostaseology, Rheumatology and Infectious Diseases, Laboratory for Immunological and Molecular Cancer Research, Oncologic Center, Paracelsus Medical University Salzburg, 5020 Salzburg, Austria.
- Center for Clinical Cancer and Immunology Trials at Salzburg Cancer Research Institute, 5020 Salzburg, Austria.
- 3rd Medical Department, Cancer Cluster Salzburg, 5020 Salzburg, Austria.
| | - Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology & Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, 1090 Vienna, Austria.
| | - Richard Greil
- 3rd Medical Department with Hematology and Medical Oncology, Hemostaseology, Rheumatology and Infectious Diseases, Laboratory for Immunological and Molecular Cancer Research, Oncologic Center, Paracelsus Medical University Salzburg, 5020 Salzburg, Austria.
- Center for Clinical Cancer and Immunology Trials at Salzburg Cancer Research Institute, 5020 Salzburg, Austria.
- 3rd Medical Department, Cancer Cluster Salzburg, 5020 Salzburg, Austria.
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Hensley MR, Cui Z, Chua RFM, Simpson S, Shammas NL, Yang JY, Leung YF, Zhang G. Evolutionary and developmental analysis reveals KANK genes were co-opted for vertebrate vascular development. Sci Rep 2016; 6:27816. [PMID: 27292017 PMCID: PMC4904190 DOI: 10.1038/srep27816] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 05/25/2016] [Indexed: 11/28/2022] Open
Abstract
Gene co-option, usually after gene duplication, in the evolution of development is found to contribute to vertebrate morphological innovations, including the endothelium-based vascular system. Recently, a zebrafish kank gene was found expressed in the vascular vessel primordium, suggesting KANK genes are a component of the developmental tool kit for the vertebrate vascular system. However, how the KANK gene family is involved in vascular vessel development during evolution remains largely unknown. First, we analyzed the molecular evolution of the KANK genes in metazoan, and found that KANK1, KANK2, KANK3 and KANK4 emerged in the lineage of vertebrate, consistent with the two rounds of vertebrate whole-genome duplications (WGD). Moreover, KANK genes were further duplicated in teleosts through the bony-fish specific WGD, while only kank1 and kank4 duplicates were retained in some of the examined fish species. We also found all zebrafish kank genes, except kank1b, are primarily expressed during embryonic vascular development. Compared to invertebrate KANK gene expression in the central nervous system, the vascular expression of zebrafish kank genes suggested KANK genes were co-opted for vertebrate vascular development. Given the cellular roles of KANK genes, our results suggest that this co-option may facilitate the evolutionary origin of vertebrate vascular vessels.
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Affiliation(s)
- Monica R Hensley
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA
| | - Zhibin Cui
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA
| | - Rhys F M Chua
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA
| | - Stefanie Simpson
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA
| | - Nicole L Shammas
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA
| | - Jer-Yen Yang
- Purdue University Center for Cancer Research; 725 Harrison Street, West Lafayette, IN 47907, USA.,Department of Basic Medical Sciences; 725 Harrison Street, West Lafayette, IN 47907,USA
| | - Yuk Fai Leung
- Department of Biological Sciences, 725 Harrison Street, West Lafayette, IN 47907,USA.,Integrative Neuroscience Center; 725 Harrison Street, West Lafayette, IN 47907, USA
| | - GuangJun Zhang
- Department of Comparative Pathobiology;.725 Harrison Street, West Lafayette, IN 47907, USA.,Purdue University Center for Cancer Research; 725 Harrison Street, West Lafayette, IN 47907, USA.,Integrative Neuroscience Center; 725 Harrison Street, West Lafayette, IN 47907, USA.,Purdue Institute for Inflammation, Immunology and Infectious Diseases (PI4D), 725 Harrison Street, West Lafayette, IN 47907, USA
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Eliades A, Wareing S, Marinopoulou E, Fadlullah MZH, Patel R, Grabarek JB, Plusa B, Lacaud G, Kouskoff V. The Hemogenic Competence of Endothelial Progenitors Is Restricted by Runx1 Silencing during Embryonic Development. Cell Rep 2016; 15:2185-2199. [PMID: 27239041 PMCID: PMC4906370 DOI: 10.1016/j.celrep.2016.05.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 03/24/2016] [Accepted: 04/27/2016] [Indexed: 01/08/2023] Open
Abstract
It is now well-established that hematopoietic stem cells (HSCs) and progenitor cells originate from a specialized subset of endothelium, termed hemogenic endothelium (HE), via an endothelial-to-hematopoietic transition. However, the molecular mechanisms determining which endothelial progenitors possess this hemogenic potential are currently unknown. Here, we investigated the changes in hemogenic potential in endothelial progenitors at the early stages of embryonic development. Using an ETV2::GFP reporter mouse to isolate emerging endothelial progenitors, we observed a dramatic decrease in hemogenic potential between embryonic day (E)7.5 and E8.5. At the molecular level, Runx1 is expressed at much lower levels in E8.5 intra-embryonic progenitors, while Bmi1 expression is increased. Remarkably, the ectopic expression of Runx1 in these progenitors fully restores their hemogenic potential, as does the suppression of BMI1 function. Altogether, our data demonstrate that hemogenic competency in recently specified endothelial progenitors is restrained through the active silencing of Runx1 expression.
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Affiliation(s)
- Alexia Eliades
- Cancer Research UK Stem Cell Hematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK
| | - Sarah Wareing
- Cancer Research UK Stem Cell Hematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK
| | - Elli Marinopoulou
- Cancer Research UK Stem Cell Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK
| | - Muhammad Z H Fadlullah
- Cancer Research UK Stem Cell Hematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK
| | - Rahima Patel
- Cancer Research UK Stem Cell Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK
| | - Joanna B Grabarek
- Faculty of Life Sciences, The University of Manchester, Manchester M13 9PT, UK
| | - Berenika Plusa
- Faculty of Life Sciences, The University of Manchester, Manchester M13 9PT, UK
| | - Georges Lacaud
- Cancer Research UK Stem Cell Biology Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK.
| | - Valerie Kouskoff
- Cancer Research UK Stem Cell Hematopoiesis Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester M20 4BX, UK.
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Beninger PG, Valdizan A, Le Pennec G. The seminal receptacle and implications for reproductive processes in the invasive gastropod Crepidula fornicata. ZOOLOGY 2015; 119:4-10. [PMID: 26429525 DOI: 10.1016/j.zool.2015.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 09/02/2015] [Accepted: 09/10/2015] [Indexed: 11/26/2022]
Abstract
The calyptraeid gastropod Crepidula fornicata is the object of considerable research attention, due to its invasive status in the North-Eastern Atlantic, its introduction to habitats throughout the Northern hemisphere, and its scientific interest as a model organism for the study of developmental and reproductive processes in the Metazoa. Since the knowledge concerning the structural foundations for its reproductive processes is surprisingly weak, we investigated the seminal receptacle, a key structure in the reproductive biology of other metazoans, using histology, scanning electron and transmission electron microscopy. The seminal receptacle consists of 9-11 lobes, each subdivided into small, narrow lobules. The inner epithelium of the lobules appears to be highly dynamic, characterised by the perforation and attachment of received spermatozoa, the progressive degeneration of this epithelium, and the concomitant detachment of the spermatozoa. The allocation of spermatozoa to many different lobules, in different phases, may explain the extended reproductive season of C. fornicata, and thereby contribute to its colonizing and invasive success. The same compartmentalisation, as well as the complete covering of the inner epithelium of the lobules by spermatozoa and the large amount of spermatozoan debris in the lumina, suggest that the C. fornicata seminal receptacle may be a site of sperm competition in this polyandrous species.
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Affiliation(s)
- Peter G Beninger
- Laboratoire de Biologie Marine, Faculté des Sciences, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes, France.
| | - Alexandra Valdizan
- Laboratoire de Biologie Marine, Faculté des Sciences, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes, France
| | - Gaël Le Pennec
- Laboratoire de Biotechnologie et de Chimie Marines, Université de Bretagne-Sud, rue saint Maudé, 56321 Lorient, France
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Systems biology of ion channels and transporters in tumor angiogenesis: An omics view. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2647-56. [DOI: 10.1016/j.bbamem.2014.10.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/09/2014] [Accepted: 10/20/2014] [Indexed: 01/19/2023]
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van Niekerk G, Davis T, Engelbrecht AM. Was the evolutionary road towards adaptive immunity paved with endothelium? Biol Direct 2015; 10:47. [PMID: 26341882 PMCID: PMC4560925 DOI: 10.1186/s13062-015-0079-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 09/02/2015] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND The characterization of a completely novel adaptive immune system (AIS) in jawless vertebrates (hagfish and lampreys) presents an excellent opportunity for exploring similarities and differences in design principles. It also highlights a somewhat neglected question: Why did vertebrates, representing only 5 % of all animals, evolve a system as complex as an AIS twice, whereas invertebrates failed to do so? A number of theories have been presented in answer to this question. However, these theories either fail to explain why invertebrates would not similarly develop an AIS and are confounded by issues of causality, or have been challenged by more recent findings. PRESENTATION OF THE HYPOTHESIS Instead of identifying a selective pressure that would drive the development of an AIS, we hypothesise that invertebrates failed to develop an AIS because of the evolutionary constraints imposed by these animals' physiological context. In particular, we argue that a number of vascular innovations in vertebrates allowed the effective implementation of an AIS. A lower blood volume allowed for a higher antibody titer (i.e., less 'diluted' antibody concentration), rendering these immune effectors more cost-effective. In addition, both a high circulatory velocity and the ability of endothelium to coordinate immune cell trafficking promote 'epitope sampling'. Collectively, these innovations allowed the effective implementation of AIS in vertebrates. TESTING THE HYPOTHESIS The hypothesis posits that a number of innovations to the vascular system provided the release from constraints which allowed the implementation of an AIS. However, this hypothesis would be refuted by phylogenetic analysis demonstrating that the AIS preceded these vascular innovations. The hypothesis also suggests that vascular performance would have an impact on the efficacy of an AIS, thus predicting a correlation between the vascular parameters of a species and its relative investment in AIS. The contribution of certain vascular innovations in augmenting immune functionality of an AIS can be tested by modelling the effect of different vascular parameters on AIS efficacy. IMPLICATIONS OF THE HYPOTHESIS The hypothesis not only explains the immunological dimorphism between vertebrates and invertebrates but also brings to attention the fact that immunity is dependent on more than just an immune system.
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Affiliation(s)
- Gustav van Niekerk
- Department of Physiological Sciences, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7600, South Africa.
| | - Tanja Davis
- Department of Physiological Sciences, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7600, South Africa.
| | - Anna-Mart Engelbrecht
- Department of Physiological Sciences, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7600, South Africa.
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Brunet T, Lauri A, Arendt D. Did the notochord evolve from an ancient axial muscle? The axochord hypothesis. Bioessays 2015; 37:836-50. [PMID: 26172338 PMCID: PMC5054868 DOI: 10.1002/bies.201500027] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 06/03/2015] [Accepted: 06/05/2015] [Indexed: 12/20/2022]
Abstract
The origin of the notochord is one of the key remaining mysteries of our evolutionary ancestry. Here, we present a multi‐level comparison of the chordate notochord to the axochord, a paired axial muscle spanning the ventral midline of annelid worms and other invertebrates. At the cellular level, comparative molecular profiling in the marine annelids P. dumerilii and C. teleta reveals expression of similar, specific gene sets in presumptive axochordal and notochordal cells. These cells also occupy corresponding positions in a conserved anatomical topology and undergo similar morphogenetic movements. At the organ level, a detailed comparison of bilaterian musculatures reveals that most phyla form axochord‐like muscles, suggesting that such a muscle was already present in urbilaterian ancestors. Integrating comparative evidence at the cell and organ level, we propose that the notochord evolved by modification of a ventromedian muscle followed by the assembly of an axial complex supporting swimming in vertebrate ancestors.
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Affiliation(s)
- Thibaut Brunet
- Developmental Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Antonella Lauri
- Developmental Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Detlev Arendt
- Developmental Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
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43
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Pinsino A, Matranga V. Sea urchin immune cells as sentinels of environmental stress. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2015; 49:198-205. [PMID: 25463510 DOI: 10.1016/j.dci.2014.11.013] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 11/14/2014] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
Echinoderms, an ancient and very successful phylum of marine invertebrates, play a central role in the maintenance of ecosystem integrity and are constantly exposed to environmental pressure, including: predation, changes in temperature and pH, hypoxia, pathogens, UV radiation, metals, toxicants, and emerging pollutants like nanomaterials. The annotation of the sea urchin genome, so closely related to humans and other vertebrate genomes, revealed an unusually complex immune system, which may be the basis for why sea urchins can adapt to different marine environments and survive even in hazardous conditions. In this review, we give a brief overview of the morphological features and recognized functions of echinoderm immune cells with a focus on studies correlating stress and immunity in the sea urchin. Immune cells from adult Paracentrotus lividus, which have been introduced in the last fifteen years as sentinels of environmental stress, are valid tools to uncover basic molecular and regulatory mechanisms of immune responses, supporting their use in immunological research. Here we summarize laboratory and field studies that reveal the amenability of sea urchin immune cells for toxicological testing.
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Affiliation(s)
- Annalisa Pinsino
- Consiglio Nazionale delle Ricerche, Istituto di Biomedicina e Immunologia Molecolare "A. Monroy", Via Ugo La Malfa 153, 90146 Palermo, Italy.
| | - Valeria Matranga
- Consiglio Nazionale delle Ricerche, Istituto di Biomedicina e Immunologia Molecolare "A. Monroy", Via Ugo La Malfa 153, 90146 Palermo, Italy.
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Kumar A, Bhandari A, Goswami C. Surveying genetic variants and molecular phylogeny of cerebral cavernous malformation gene, CCM3/PDCD10. Biochem Biophys Res Commun 2014; 455:98-106. [DOI: 10.1016/j.bbrc.2014.10.105] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/21/2014] [Indexed: 11/29/2022]
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Stapor P, Wang X, Goveia J, Moens S, Carmeliet P. Angiogenesis revisited - role and therapeutic potential of targeting endothelial metabolism. J Cell Sci 2014; 127:4331-41. [PMID: 25179598 DOI: 10.1242/jcs.153908] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Clinically approved therapies that target angiogenesis in tumors and ocular diseases focus on controlling pro-angiogenic growth factors in order to reduce aberrant microvascular growth. Although research on angiogenesis has revealed key mechanisms that regulate tissue vascularization, therapeutic success has been limited owing to insufficient efficacy, refractoriness and tumor resistance. Emerging concepts suggest that, in addition to growth factors, vascular metabolism also regulates angiogenesis and is a viable target for manipulating the microvasculature. Recent studies show that endothelial cells rely on glycolysis for ATP production, and that the key glycolytic regulator 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3) regulates angiogenesis by controlling the balance of tip versus stalk cells. As endothelial cells acquire a tip cell phenotype, they increase glycolytic production of ATP for sprouting. Furthermore, pharmacological blockade of PFKFB3 causes a transient, partial reduction in glycolysis, and reduces pathological angiogenesis with minimal systemic harm. Although further assessment of endothelial cell metabolism is necessary, these results represent a paradigm shift in anti-angiogenic therapy from targeting angiogenic factors to focusing on vascular metabolism, warranting research on the metabolic pathways that govern angiogenesis.
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Affiliation(s)
- Peter Stapor
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, B-3000 Leuven, Belgium Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, KU Leuven, B-3000 Leuven, Belgium
| | - Xingwu Wang
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, B-3000 Leuven, Belgium Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, KU Leuven, B-3000 Leuven, Belgium
| | - Jermaine Goveia
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, B-3000 Leuven, Belgium Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, KU Leuven, B-3000 Leuven, Belgium
| | - Stijn Moens
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, B-3000 Leuven, Belgium Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, KU Leuven, B-3000 Leuven, Belgium
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, B-3000 Leuven, Belgium Laboratory of Angiogenesis and Neurovascular link, Department of Oncology, KU Leuven, B-3000 Leuven, Belgium
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Sharlaimova N, Shabelnikov S, Petukhova O. Small coelomic epithelial cells of the starfish Asterias rubens L. that are able to proliferate in vivo and in vitro. Cell Tissue Res 2014; 356:83-95. [PMID: 24408073 DOI: 10.1007/s00441-013-1766-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 11/08/2013] [Indexed: 10/25/2022]
Abstract
Echinoderms, due to their outstanding potential for regeneration, are widely used as experimental models for research in regenerative biology. One of the main problems in this field concerns identification and characterization of cells responsible for the restoration of lost body parts and organs in adult animals. In this study, we analyze the probable candidates for this role in the starfish Asterias rubens L., namely, small coelomic epithelial cells with a high nuclear-cytoplasmic ratio that have the ability to proliferate. These cells are one of several cell types common to the coelomic epithelium (CE) and coelomic fluid (CF). They are analyzed with respect to morphology, proportion in the total cell pool, dynamics after injury and distribution between CE and CF. The results of whole-mount and scanning electron microscopy provide evidence that these small cells occupy a boundary position between CE and CF. Moreover, a novel subpopulation of CE cells is identified that is enriched (up to 50 %) with small epitheliocytes capable of migrating from CE into the CF. As shown in experiments with BrdU incorporation and anti-phospho-histone H3 antibody staining, small epitheliocytes cultured on laminin retain proliferative activity for at least 1 month and can form colony-like aggregates. Two types of small proliferating cells are distinguished by their behavior in culture: some cells remain attached to the substrate and form aggregates, while others detach from the substrate during culturing. The morphology of small epitheliocytes, their proliferative activity in vivo and in vitro and the ability to migrate suggest that they possess certain properties characteristic of stem cells.
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Affiliation(s)
- Natalia Sharlaimova
- Department of Cell Cultures, Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, St. Petersburg, 194064, Russia
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Abstract
Endothelial cells (ECs) are quiescent for years but can plastically switch to angiogenesis. Vascular sprouting relies on the coordinated activity of migrating tip cells at the forefront and proliferating stalk cells that elongate the sprout. Past studies have identified genetic signals that control vascular branching. Prominent are VEGF, activating tip cells, and Notch, which stimulates stalk cells. After the branch is formed and perfused, ECs become quiescent phalanx cells. Now, emerging evidence has accumulated indicating that ECs not only adapt their metabolism when switching from quiescence to sprouting but also that metabolism regulates vascular sprouting in parallel to the control by genetic signals.
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Affiliation(s)
- Katrien De Bock
- Department of Oncology, University of Leuven, Laboratory of Angiogenesis and Neurovascular Link, Vesalius Research Center, Leuven 3000, Belgium; VIB, Laboratory of Angiogenesis and Neurovascular Link, Vesalius Research Center, Leuven 3000, Belgium
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48
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Monahan-Earley R, Dvorak AM, Aird WC. Evolutionary origins of the blood vascular system and endothelium. J Thromb Haemost 2013; 11 Suppl 1:46-66. [PMID: 23809110 PMCID: PMC5378490 DOI: 10.1111/jth.12253] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Every biological trait requires both a proximate and evolutionary explanation. The field of vascular biology is focused primarily on proximate mechanisms in health and disease. Comparatively little attention has been given to the evolutionary basis of the cardiovascular system. Here, we employ a comparative approach to review the phylogenetic history of the blood vascular system and endothelium. In addition to drawing on the published literature, we provide primary ultrastructural data related to the lobster, earthworm, amphioxus, and hagfish. Existing evidence suggests that the blood vascular system first appeared in an ancestor of the triploblasts over 600 million years ago, as a means to overcome the time-distance constraints of diffusion. The endothelium evolved in an ancestral vertebrate some 540-510 million years ago to optimize flow dynamics and barrier function, and/or to localize immune and coagulation functions. Finally, we emphasize that endothelial heterogeneity evolved as a core feature of the endothelium from the outset, reflecting its role in meeting the diverse needs of body tissues.
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Affiliation(s)
- Rita Monahan-Earley
- The Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, MA 02215
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA 02215
| | - Ann M. Dvorak
- The Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, MA 02215
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA 02215
| | - William C. Aird
- The Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, MA 02215
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215
- Mount Desert Island Biological Laboratory, Salisbury Cover, ME 04672
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Vascular Endothelial Growth Factor Receptor Family in Ascidians, Halocynthia roretzi (Sea Squirt). Its High Expression in Circulatory System-Containing Tissues. Int J Mol Sci 2013; 14:4841-53. [PMID: 23455462 PMCID: PMC3634500 DOI: 10.3390/ijms14034841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 02/07/2013] [Accepted: 02/15/2013] [Indexed: 11/19/2022] Open
Abstract
The vascular endothelial growth factor (VEGF)-VEGF Receptor (VEGFR) system is an important pathway for regulation of angiogenesis. However, its evolutionary development, particularly the step from invertebrates to vertebrates, is still largely unknown. Here, we molecularly cloned the VEGFR-like gene from Halocynthia roretzi, a species belonging to the Tunicata, the chordate subphylum recently considered the sister group of vertebrates. The cDNA encoded a homolog of human VEGFR, including the transmembrane domain, and the tyrosine kinase domain with a kinase-insert region, which was designated S. sq VEGFR (GenBank AB374180). Similar to Tunicates including ascidians in the phylogenetic tree, the Amphioxus, another chordate, is located close to vertebrates. However, S. sq VEGFR has a higher homology than the Amphioxus VEGFR-like molecule (GenBank AB025557) to human VEGFR in the kinase domain-2 region. The S. sq VEGFR mRNA was expressed at highest levels in circulatory system-containing tissues, suggesting that S. sq VEGFR plays an important role in the formation or maintenance of circulatory system in Tunicates, Halocynthia roretzi.
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50
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Abstract
The vertebrate circulatory system is the most complex vascular system among those of metazoans, with key innovations including a multi-chambered heart and highly specialized blood cells. Invertebrate vessels, on the other hand, consist of hemal spaces between the basal laminae of epithelia. How the evolutionary transition from an invertebrate-type system to the complex vertebrate one occurred is, however, poorly understood. We investigate here the development of the cardiovascular system of the cephalochordate amphioxus Branchiostoma lanceolatum in order to gain insight into the origin of the vertebrate cardiovascular system. The cardiac markers Hand, Csx (Nkx2-5) and Tbx4/5 reveal a broad cardiac-like domain in amphioxus; such a decentralized organization during development parallels that seen in the adult anatomy. Our data therefore support the hypothesis that amphioxus never possessed a proper heart, even transiently during development. We also define a putative hematopoietic domain, supported by the expression of the hematopoietic markers Scl and Pdvegfr. We show that this area is closed to the dorsal aorta anlages, partially linked to excretory tissues, and that its development is regulated by retinoic acid, thus recalling the aorta-gonads-mesonephros (AGM) area of vertebrates. This region probably produces Pdvegfr+ hemal cells, with an important role in amphioxus vessel formation, since treatments with an inhibitor of PDGFR/VEGFR lead to a decrease of Laminin in the basal laminae of developing vessels. Our results point to a chordate origin of hematopoiesis in an AGM-like area from where hemal Pdvegfr+ cells are produced. These Pdvegfr+ cells probably resemble the ancestral chordate blood cells from which the vertebrate endothelium later originated.
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