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Pazzaglia UE, Reguzzoni M, Saroglia M, Manconi R, Zarattini G, Raspanti M. The complex rostral morphology and the endoskeleton ossification process of two adult samples of Xiphias gladius (Xiphiidae). JOURNAL OF FISH BIOLOGY 2022; 101:42-54. [PMID: 35481825 PMCID: PMC9545449 DOI: 10.1111/jfb.15069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
The authors studied the morphology of the upper and lower jaws, vertebrae and dorsal-fin rays of the teleost fish Xiphias gladius to analyse the skeletal architecture and ossification pattern. The analogies and differences among these segments were investigated to identify a common morphogenetic denominator of the bone tissue osteogenesis and modeling. The large fat glands in the proximal upper jaw and their relationship to the underlying cartilage (absent in the lower jaw) suggested that there is a mechanism that explains rostral overgrowth in the Xiphiidae and Istiophoriidae families. Thus far, the compact structure of the distal rostrum has been interpreted as being the result of remodeling. Nonetheless, no evidence of cutting cones, scalloped outer border of osteons and sequence of bright-dark bands in polarized light was observed in this study, suggesting a primary osteon texture formed by compacting of collagen matrix and mineral deposition in the fat stroma lacunae of the bone, but without being oriented in layers of the collagen fibrils. A similar histology also characterizes the circular structures present in the other examined segments of the skeleton. The early phases of fibrillogenesis carried out by fibroblast-like cells occurred farther from the already-calcified bone surface inside the fat stroma lacunae. The fibrillar matrix was compacted and underwent mineral deposition near the previously calcified bone surface. This pattern of collagen matrix synthesis and calcification was different from that of mammalian osteoblasts, especially concerning the ability to build a lacuno-canalicular system among cells. Necrosis or apoptosis of the latter and refilling of the empty lacunae by mineral deposits might explain the anosteocytic bone formation.
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Affiliation(s)
- Ugo E. Pazzaglia
- Department of Specialità Chirurgiche, Scienze radiologiche e Sanità PubblicaUniversity of BresciaBresciaItaly
| | | | - Marco Saroglia
- Department of Biotecnologie e Scienze della VitaUniversity of InsubriaVareseItaly
| | - Renata Manconi
- Department of Veterinary Medicine, Zoology LabUniversity of SassariSassariItaly
| | - Guido Zarattini
- Department of Specialità Chirurgiche, Scienze radiologiche e Sanità PubblicaUniversity of BresciaBresciaItaly
| | - Mario Raspanti
- Department of Medicina e ChirurgiaUniversity of InsubriaVareseItaly
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2
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Davesne D, Meunier FJ, Schmitt AD, Friedman M, Otero O, Benson RBJ. The phylogenetic origin and evolution of acellular bone in teleost fishes: insights into osteocyte function in bone metabolism. Biol Rev Camb Philos Soc 2019; 94:1338-1363. [DOI: 10.1111/brv.12505] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 02/11/2019] [Accepted: 02/13/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Donald Davesne
- Department of Earth SciencesUniversity of Oxford OX1 3AN Oxford U.K
| | - François J. Meunier
- BOREA (UMR 7208 CNRS, IRD, MNHN, Sorbonne Université)Muséum national d'Histoire naturelle 75005 Paris France
| | - Armin D. Schmitt
- Department of Earth SciencesUniversity of Oxford OX1 3AN Oxford U.K
| | - Matt Friedman
- Museum of Paleontology and Department of Earth and Environmental SciencesUniversity of Michigan Ann Arbor MI 48109‐1079 U.S.A
| | - Olga Otero
- PalEvoPrim (UMR 7262 CNRS)Université de Poitiers 86000 Poitiers France
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The Multiscale Architectures of Fish Bone and Tessellated Cartilage and Their Relation to Function. ARCHITECTURED MATERIALS IN NATURE AND ENGINEERING 2019. [DOI: 10.1007/978-3-030-11942-3_11] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Micro-anatomical structure of the first spine of the dorsal fin of Atlantic bluefin tuna, Thunnus thynnus (Osteichthyes: Scombridae). Ann Anat 2018; 219:1-7. [DOI: 10.1016/j.aanat.2018.03.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 03/23/2018] [Accepted: 03/29/2018] [Indexed: 11/19/2022]
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5
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Wainwright DK, Ingersoll S, Lauder GV. Scale diversity in bigeye tuna (Thunnus obesus): Fat-filled trabecular scales made of cellular bone. J Morphol 2018. [PMID: 29537097 DOI: 10.1002/jmor.20814] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Tunas of the genus Thunnus possess many morphological and physiological adaptations for their high-performance epipelagic ecology. Although Thunnus anatomy has been studied, there are no quantitative studies on the structure of their scales. We investigated the scales of bigeye tuna (Thunnus obesus) from ten regions of the body using micro computed tomography (µCT)-scanning and histology to quantitatively and qualitatively compare regional scale morphology. We found a diversity of scale sizes and shapes across the body of bigeye tuna and discriminant function analysis on variables derived from µCT-data showed that scales across the body differ quantitatively in shape and size. We also report the discovery of a novel scale type in corselet, tail, and cheek regions. These modified scales are ossified shells supported by internal trabeculae, filled with fat, and possessing an internal blood supply. Histological analysis showed that the outer lamellar layers of these thickened scales are composed of cellular bone, unexpected for a perciform fish in which bone is typically acellular. In the fairing region of the anterior body, these fat-filled scales are stacked in layers up to five scales deep, forming a thickened bony casing. Cheek scales also possess a fat-filled internal trabecular structure, while most posterior body scales are more plate-like and similar to typical teleost scales. While the function of these novel fat-filled scales is unknown, we explore several possible hypotheses for their function.
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Affiliation(s)
- Dylan K Wainwright
- Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts
| | - Sam Ingersoll
- Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts
| | - George V Lauder
- Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts
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6
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Aguilera O, Rocha I, Lopes MS, Lima I, Lopes RT, Machado AS, Guimarães RB, Crapez MAC, Tenório MC, Nepomuceno A. The bone degenerative processes in senile fishes from Holocene Brazilian shell mounds. JOURNAL OF FISH DISEASES 2017; 40:1869-1881. [PMID: 28707706 DOI: 10.1111/jfd.12662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 06/07/2023]
Abstract
Zooarchaeological collections from shell mounds in Rio de Janeiro (2,470-4,632 cal BP) contain a high prevalence of swollen fish bones belonging to the Atlantic spadefish (Chaetodipterus faber), crevalle jack (Caranx hippos) and fat snook (Centropomus parallelus). Given the lack of knowledge of the bone degenerative process in senile fishes, this study analysed hyperostotic bone in zooarchaeological and modern specimens to obtain high-resolution morphology and microstructure reconstruction. We used microCT as well as X-ray diffraction to characterize the crystallographic changes associated with fish senility. Our results showed that trabecular microstructures in hyperostotic bones were consistent with estimated values of the per cent bone volume-to-total volume ratio (BV/TV) and were greater than 60% in cortical bone. Hyperostotic bones indicated a high radiograph density, and X-ray diffractograms showed a decrease in hydroxyapatite [Ca10 (PO4 )6 (OH)2 ] and calcite (CaCO3 ) neocrystallization. These crystalline and density changes revealed an advanced stage of fish senile and indicate the vulnerability of ageing fish populations.
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Affiliation(s)
- O Aguilera
- Departamento de Biologia Marinha, Programa de Pós-graduação em Biologia Marinha e Ambientes Costeiros, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - I Rocha
- Nuclear Instrumentation Laboratory, Nuclear Engineering Program/COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - M S Lopes
- Departamento de Biologia Marinha, Programa de Pós-graduação em Biologia Marinha e Ambientes Costeiros, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - I Lima
- Nuclear Instrumentation Laboratory, Nuclear Engineering Program/COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - R T Lopes
- Nuclear Instrumentation Laboratory, Nuclear Engineering Program/COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - A S Machado
- Nuclear Instrumentation Laboratory, Nuclear Engineering Program/COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - R B Guimarães
- Instituto de Física, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - M A C Crapez
- Departamento de Biologia Marinha, Programa de Pós-graduação em Biologia Marinha e Ambientes Costeiros, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - M C Tenório
- Departamento de Antropologia, Museu Nacional, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - A Nepomuceno
- Departamento de Biologia Marinha, Programa de Pós-graduação em Biologia Marinha e Ambientes Costeiros, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
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7
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van Raamsdonk LWD, Prins TW, van de Rhee N, Vliege JJM, Pinckaers VGZ. Microscopic recognition and identification of fish meal in compound feeds. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:1364-1376. [DOI: 10.1080/19440049.2017.1283711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - T. W. Prins
- RIKILT Wageningen University and Research, Wageningen, the Netherlands
| | - N. van de Rhee
- RIKILT Wageningen University and Research, Wageningen, the Netherlands
| | - J. J. M. Vliege
- RIKILT Wageningen University and Research, Wageningen, the Netherlands
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Atkins A, Reznikov N, Ofer L, Masic A, Weiner S, Shahar R. The three-dimensional structure of anosteocytic lamellated bone of fish. Acta Biomater 2015; 13:311-23. [PMID: 25449924 DOI: 10.1016/j.actbio.2014.10.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/24/2014] [Accepted: 10/21/2014] [Indexed: 12/18/2022]
Abstract
Fish represent the most diverse and numerous of the vertebrate clades. In contrast to the bones of all tetrapods and evolutionarily primitive fish, many of the evolutionarily more advanced fish have bones that do not contain osteocytes. Here we use a variety of imaging techniques to show that anosteocytic fish bone is composed of a sequence of planar layers containing mainly aligned collagen fibrils, in which the prevailing principal orientation progressively spirals. When the sequence of fibril orientations completes a rotation of around 180°, a thin layer of poorly oriented fibrils is present between it and the next layer. The thick layer of aligned fibrils and the thin layer of non-aligned fibrils constitute a lamella. Although both basic components of mammalian lamellar bone are found here as well, the arrangement is unique, and we therefore call this structure lamellated bone. We further show that the lamellae of anosteocytic fish bone contain an array of dense, small-diameter (1-4 μm) bundles of hypomineralized collagen fibrils that are oriented mostly orthogonal to the lamellar plane. Results of mechanical tests conducted on beams from anosteocytic fish bone and human cortical bone show that the fish bones are less stiff but much tougher than the human bones. We propose that the unique lamellar structure and the orthogonal hypomineralized collagen bundles are responsible for the unusual mechanical properties and mineral distribution in anosteocytic fish bone.
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Affiliation(s)
- Ayelet Atkins
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Natalie Reznikov
- Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Lior Ofer
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Admir Masic
- Department of Biomaterials, Max Planck Institute of Colloids & Interfaces, Am Muehlenberg 1, 14476 Potsdam, Germany
| | - Steve Weiner
- Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ron Shahar
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot 76100, Israel.
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9
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Currey JD, Shahar R. Cavities in the compact bone in tetrapods and fish and their effect on mechanical properties. J Struct Biol 2013; 183:107-22. [PMID: 23664869 DOI: 10.1016/j.jsb.2013.04.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 04/10/2013] [Accepted: 04/12/2013] [Indexed: 01/12/2023]
Abstract
Bone includes cavities in various length scales, from nanoporosities occurring between the collagen fibrils and the mineral crystals all the way to macrocavities like the medullary cavity. In particular, bone is permeated by a vast number of channels (the lacunar-canalicular system), that reduce the stiffness and, more importantly, the strength of the bone that they permeate. These consequences are presumably a price worth paying for the ability of the lacunar-canalicular system to detect changes in the strain environment within the bone material and, when deleterious, to trigger processes like modeling or remodeling which 'rectify' it. Here we review the size and density of the various types of cavities in bone, and discuss their effect on the mechanical properties of cortical bone. In this respect the bones of advanced teleost fish species (probably the majority of all vertebrate species) are an unsolved conundrum because they lack bone cells (and therefore lacunae and canaliculi) in their skeleton. Yet, despite being acellular, some of these fish can undergo considerable remodeling in at least some parts of their skeleton. We address, but do not solve this mystery.
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Affiliation(s)
- John D Currey
- Department of Biology, University of York, York YO10 5DD, UK.
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10
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Sanchez S, Dupret V, Tafforeau P, Trinajstic KM, Ryll B, Gouttenoire PJ, Wretman L, Zylberberg L, Peyrin F, Ahlberg PE. 3D microstructural architecture of muscle attachments in extant and fossil vertebrates revealed by synchrotron microtomography. PLoS One 2013; 8:e56992. [PMID: 23468901 PMCID: PMC3582629 DOI: 10.1371/journal.pone.0056992] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 01/16/2013] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Firm attachments binding muscles to skeleton are crucial mechanical components of the vertebrate body. These attachments (entheses) are complex three-dimensional structures, containing distinctive arrangements of cells and fibre systems embedded in the bone, which can be modified during ontogeny. Until recently it has only been possible to obtain 2D surface and thin section images of entheses, leaving their 3D histology largely unstudied except by extrapolation from 2D data. Entheses are frequently preserved in fossil bones, but sectioning is inappropriate for rare or unique fossil material. METHODOLOGY/PRINCIPAL FINDINGS Here we present the first non-destructive 3D investigation, by propagation phase contrast synchrotron microtomography (PPC-SRµCT), of enthesis histology in extant and fossil vertebrates. We are able to identify entheses in the humerus of the salamander Desmognathus from the organization of bone-cell lacunae and extrinsic fibres. Statistical analysis of the lacunae differentiates types of attachments, and the orientation of the fibres, reflect the approximate alignment of the muscle. Similar histological structures, including ontogenetically related pattern changes, are perfectly preserved in two 380 million year old fossil vertebrates, the placoderm Compagopiscis croucheri and the sarcopterygian fish Eusthenopteron foordi. CONCLUSIONS/SIGNIFICANCE We are able to determine the position of entheses in fossil vertebrates, the approximate orientation of the attached muscles, and aspects of their ontogenetic histories, from PPC-SRµCT data. Sub-micron microtomography thus provides a powerful tool for studying the structure, development, evolution and palaeobiology of muscle attachments.
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Affiliation(s)
- Sophie Sanchez
- European Synchrotron Radiation Facility, Grenoble, France
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
| | - Vincent Dupret
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
| | - Paul Tafforeau
- European Synchrotron Radiation Facility, Grenoble, France
| | - Katherine M. Trinajstic
- Department of Chemistry, Curtin University, Perth, Australia
- Department of Earth and Planetary Sciences, Western Australian Museum, Perth, Australia
| | - Bettina Ryll
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
| | - Pierre-Jean Gouttenoire
- European Synchrotron Radiation Facility, Grenoble, France
- Unité mixte de recherche 5220, Centre national de la recherche scientifique, Institut national de la santé et de la recherche médicale U1044, Universtité de Lyon, Lyon, France
| | - Lovisa Wretman
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
| | - Louise Zylberberg
- Unité mixte de recherche 7193, Centre national de la recherche scientifique, Université Pierre et Marie Curie, Institut des sciences de la Terre de Paris, Paris, France
| | - Françoise Peyrin
- European Synchrotron Radiation Facility, Grenoble, France
- Unité mixte de recherche 5220, Centre national de la recherche scientifique, Institut national de la santé et de la recherche médicale U1044, Universtité de Lyon, Lyon, France
| | - Per E. Ahlberg
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
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Cohen L, Dean M, Shipov A, Atkins A, Monsonego-Ornan E, Shahar R. Comparison of structural, architectural and mechanical aspects of cellular and acellular bone in two teleost fish. J Exp Biol 2012; 215:1983-93. [DOI: 10.1242/jeb.064790] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARY
The histological diversity of the skeletal tissues of fishes is impressive compared with that of other vertebrate groups, yet our understanding of the functional consequences of this diversity is limited. In particular, although it has been known since the mid-1800s that a large number of fish species possess acellular bones, the mechanical advantages and consequences of this structural characteristic – and therefore the nature of the evolution of this feature – remain unclear. Although several studies have examined the material properties of fish bone, these have used a variety of techniques and there have been no direct contrasts of acellular and cellular bone. We report on a comparison of the structural and mechanical properties of the ribs and opercula between two freshwater fish – the common carp Cyprinus carpio (a fish with cellular bone) and the tilapia Oreochromis aureus (a fish with acellular bone). We used light microscopy to show that the bones in both fish species exhibit poor blood supply and possess discrete tissue zones, with visible layering suggesting differences in the underlying collagen architecture. We performed identical micromechanical testing protocols on samples of the two bone types to determine the mechanical properties of the bone material of opercula and ribs. Our data support the consensus of literature values, indicating that Young’s moduli of cellular and acellular bones are in the same range, and lower than Young’s moduli of the bones of mammals and birds. Despite these similarities in mechanical properties between the bone tissues of the fish species tested here, cellular bone had significantly lower mineral content than acellular bone; furthermore, the percentage ash content and bone mineral density values (derived from micro-CT scans) show that the bone of these fishes is less mineralized than amniote bone. Although we cannot generalize from our data to the numerous remaining teleost species, the results presented here suggest that while cellular and acellular fish bone may perform similarly from a mechanical standpoint, there are previously unappreciated differences in the structure and composition of these bone types.
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Affiliation(s)
- Liat Cohen
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel
| | - Mason Dean
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14424 Potsdam, Germany
| | - Anna Shipov
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel
| | - Ayelet Atkins
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel
| | - Efrat Monsonego-Ornan
- School of Biochemistry and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel
| | - Ron Shahar
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Israel
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Cao L, Moriishi T, Miyazaki T, Iimura T, Hamagaki M, Nakane A, Tamamura Y, Komori T, Yamaguchi A. Comparative morphology of the osteocyte lacunocanalicular system in various vertebrates. J Bone Miner Metab 2011; 29:662-70. [PMID: 21499992 DOI: 10.1007/s00774-011-0268-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 03/15/2011] [Indexed: 11/27/2022]
Abstract
Osteocytes are embedded in the bone matrix, and they communicate with adjacent osteocytes, osteoblasts, and osteoclasts through the osteocyte lacunocanalicular system. Osteocytes are believed to be essential for the maintenance of bone homeostasis because they regulate mechanical sensing and mineral metabolism in mammalian bones; however, osteocyte morphology in other vertebrates has not been well documented. We conducted a comparative study on the morphology of osteocytes and the lacunocanalicular system of the following vertebrates: two teleost fishes [medaka (Oryzias latipes), and zebrafish (Danio rerio)], three amphibians [African clawed frog (Xenopus laevis), black-spotted pond frog (Rana nigromaculata), and Japanese fire-bellied newt (Cynops pyrrhogaster)], two reptiles [four-toed tortoise (Testudo horsfieldii) and green iguana (Iguana iguana)], and two mammals (laboratory mouse C57BL6 and human). The distribution of the osteocyte lacunocanalicular system in all these animals was investigated using the modified silver staining and the fluorescein-conjugated phalloidin staining methods. Bones of medaka had few osteocytes (acellular bone). Bones of zebrafish contained osteocytes (cellular bone) but had a poorly developed osteocyte lacunocanalicular system. Bones of Xenopus laevis, a freshwater species, and of other amphibians, reptiles, and mammals contained numerous osteocytes and a well-developed lacunocanalicular system. The present study indicates that development of the osteocyte lacunocanalicular system differs between teleost fishes and land vertebrates, but this pattern is not directly related to aquatic habitat.
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Affiliation(s)
- Lei Cao
- Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University Graduate School, 1-5-45 Yushima, Tokyo 113-8549, Japan
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13
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Totland GK, Fjelldal PG, Kryvi H, Løkka G, Wargelius A, Sagstad A, Hansen T, Grotmol S. Sustained swimming increases the mineral content and osteocyte density of salmon vertebral bone. J Anat 2011; 219:490-501. [PMID: 21615400 DOI: 10.1111/j.1469-7580.2011.01399.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This study addresses the effects of increased mechanical load on the vertebral bone of post-smolt Atlantic salmon by forcing them to swim at controlled speeds. The fish swam continuously in four circular tanks for 9 weeks, two groups at 0.47 body lengths (bl) × s(-1) (non-exercised group) and two groups at 2 bl × s(-1) (exercised group), which is just below the limit for maximum sustained swimming speed in this species. Qualitative data concerning the vertebral structure were obtained from histology and electron microscopy, and quantitative data were based on histomorphometry, high-resolution X-ray micro-computed tomography images and analysis of bone mineral content, while the mechanical properties were tested by compression. Our key findings are that the bone matrix secreted during sustained swimming had significantly higher mineral content and mechanical strength, while no effect was detected on bone in vivo architecture. mRNA levels for two mineralization-related genes bgp and alp were significantly upregulated in the exercised fish, indicating promotion of mineralization. The osteocyte density of the lamellar bone of the amphicoel was also significantly higher in the exercised than non-exercised fish, while the osteocyte density in the cancellous bone was similar in the two groups. The vertebral osteocytes did not form a functional syncytium, which shows that salmon vertebral bone responds to mechanical loading in the absence of an extensive connecting syncytial network of osteocytic cell processes as found in mammals, indicating the existence of a different mechanosensing mechanism. The adaptive response to increased load is thus probably mediated by osteoblasts or bone lining cells, a system in which signal detection and response may be co-located. This study offers new insight into the teleost bone biology, and may have implications for maintaining acceptable welfare for farmed salmon.
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Witten PE, Huysseune A. A comparative view on mechanisms and functions of skeletal remodelling in teleost fish, with special emphasis on osteoclasts and their function. Biol Rev Camb Philos Soc 2009; 84:315-46. [PMID: 19382934 DOI: 10.1111/j.1469-185x.2009.00077.x] [Citation(s) in RCA: 209] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Resorption and remodelling of skeletal tissues is required for development and growth, mechanical adaptation, repair, and mineral homeostasis of the vertebrate skeleton. Here we review for the first time the current knowledge about resorption and remodelling of the skeleton in teleost fish, the largest and most diverse group of extant vertebrates. Teleost species are increasingly used in aquaculture and as models in biomedical skeletal research. Thus, detailed knowledge is required to establish the differences and similarities between mammalian and teleost skeletal remodelling, and between distantly related species such as zebrafish (Danio rerio) and medaka (Oryzias latipes). The cellular mechanisms of differentiation and activation of osteoclasts and the functions of teleost skeletal remodelling are described. Several characteristics, related to skeletal remodelling, distinguish teleosts from mammals. These characteristics include (a) the absence of osteocytes in most species; (b) the absence of haematopoietic bone marrow tissue; (c) the abundance of small mononucleated osteoclasts performing non-lacunar (smooth) bone resorption, in addition to or instead of multinucleated osteoclasts; and (d) a phosphorus- rather than calcium-driven mineral homeostasis (mainly affecting the postcranial dermal skeleton). Furthermore, (e) skeletal resorption is often absent from particular sites, due to sparse or lacking endochondral ossification. Based on the mode of skeletal remodelling in early ontogeny of all teleosts and in later stages of development of teleosts with acellular bone we suggest a link between acellular bone and the predominance of mononucleated osteoclasts, on the one hand, and cellular bone and multinucleated osteoclasts on the other. The evolutionary origin of skeletal remodelling is discussed and whether mononucleated osteoclasts represent an ancestral type of resorbing cells. Revealing the differentiation and activation of teleost skeletal resorbing cells, in the absence of several factors that trigger mammalian osteoclast differentiation, is a current challenge. Understanding which characters of teleost bone remodelling are derived and which characters are conserved should enhance our understanding of the process in fish and may provide insights into alternative pathways of bone remodelling in mammals.
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15
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The osteocyte lineage. Arch Biochem Biophys 2008; 473:106-11. [DOI: 10.1016/j.abb.2008.04.009] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Revised: 04/10/2008] [Accepted: 04/10/2008] [Indexed: 11/23/2022]
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Abstract
Osteocytes, the most abundant cell type in bone, remain the least characterized. Several theories have been proposed regarding their function, including osteolysis, sensing the strains produced in response to mechanical loading of bones, and producing signals that affect the function of osteoblasts and osteoclasts and hence, bone turnover. This review also discusses the role of osteocyte apoptosis in targeted bone remodeling and proposes that the occurrence of osteocyte apoptosis is consistent with the description of apoptosis as an essential homeostatic mechanism for the healthy maintenance of tissues.
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Affiliation(s)
- Giolanta Kogianni
- Musculoskeletal Tissue Engineering Collaboration (MTEC), University of Edinburgh Medical School, The Chancellor's Building, Edinburgh EH16 4SB, UK
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Renn J, Winkler C, Schartl M, Fischer R, Goerlich R. Zebrafish and medaka as models for bone research including implications regarding space-related issues. PROTOPLASMA 2006; 229:209-14. [PMID: 17180503 DOI: 10.1007/s00709-006-0215-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Accepted: 11/20/2005] [Indexed: 05/10/2023]
Abstract
Teleost fish develop bones directly from mesenchymal condensations and from cartilage precursors. At the cellular level, the involved cell populations share many features with their mammalian counterparts. In addition, several genes are already described in fish showing high homology in amino acid sequence and expression with the corresponding genes of tetrapods that are involved in bone metabolism. Therefore, analysis of the underlying molecular mechanism in fish, in particular zebrafish and medaka, will increase the knowledge in teleosts. Furthermore, it will help to identify novel genes and regulatory pathways of bone homeostasis and skeletal disorders also in higher vertebrates, including disorders caused by altered gravity.
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Affiliation(s)
- J Renn
- Department of Molecular Biotechnology, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany.
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18
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Abstract
During osteogenesis, osteoblasts lay down osteoid and transform into osteocytes embedded in mineralized bone matrix. Despite the fact that osteocytes are the most abundant cellular component of bone, little is known about the process of osteoblast-to-osteocyte transformation. What is known is that osteoblasts undergo a number of changes during this transformation, yet retain their connections to preosteoblasts and osteocytes. This review explores the osteoblast-to-osteocyte transformation during intramembranous ossification from both morphological and molecular perspectives. We investigate how these data support five schemes that describe how an osteoblast could become entrapped in the bone matrix (in mammals) and suggest one of the five scenarios that best fits as a model. Those osteoblasts on the bone surface that are destined for burial and destined to become osteocytes slow down matrix production compared to neighbouring osteoblasts, which continue to produce bone matrix. That is, cells that continue to produce matrix actively bury cells producing less or no new bone matrix (passive burial). We summarize which morphological and molecular changes could be used as characters (or markers) to follow the transformation process.
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Witten PE, Hall BK. Seasonal changes in the lower jaw skeleton in male Atlantic salmon (Salmo salar L.): remodelling and regression of the kype after spawning. J Anat 2003; 203:435-50. [PMID: 14635799 PMCID: PMC1571185 DOI: 10.1046/j.1469-7580.2003.00239.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2003] [Indexed: 11/20/2022] Open
Abstract
The return of Atlantic salmon (Salmon salar) to their home river for spawning coincides with drastic skeletal alterations in both sexes. Most prominent is the development of a kype (hook) at the tip of the lower jaw in males. Salmon that survive spawning have to cope with the kype throughout their life, unless it disappears after spawning, as was suggested in the early literature. To understand the fate of the kype skeleton, we compared morphological and histological features of kypes from pre-spawned mature anadromous males (grilse) with post-spawned males (kelts). The kype of male grilse is supported by fast-growing skeletal needles that differ from regular dentary bone. In kelts, growth of the kype skeleton has stopped and skeletal needles are resorbed apically by osteoclasts. Simultaneously, and despite the critical physiological condition of the animals, proximal parts of the kype skeleton are remodelled and converted into regular dentary bone. Apical resorption of the skeleton explains reports of a decrease of the kype in kelts. The conversion of basal kype skeleton into regular dentary bone contributes to the elongation of the dentary and probably also to the development of a larger kype in repetitive spawning males.
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Affiliation(s)
- P Eckhard Witten
- Institute of Marine Research at the University of Kiel, Germany.
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20
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Witten PE, Hansen A, Hall BK. Features of mono- and multinucleated bone resorbing cells of the zebrafish Danio rerio and their contribution to skeletal development, remodeling, and growth. J Morphol 2001; 250:197-207. [PMID: 11746460 DOI: 10.1002/jmor.1065] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To provide basic data about bone resorbing cells in the skeleton during the life cycle of Danio rerio, larvae, juveniles, and adults (divided into six age groups) were studied by histological procedures and by demonstration of the osteoclast marker enzyme tartrate-resistant acid phosphatase (TRAP). Special attention was paid to the lower jaw, which is a standard element for fish bone studies. The presence of osteoclasts at endosteal surfaces of growing bones of all animals older than 20 days reveals that resorption is an important part of zebrafish skeletal development. The first bone-resorbing cells to form are mononucleated. They appear in 20-day-old animals concurrently in the craniofacial skeleton and vertebral column. Mononucleated osteoclasts are predominant in juveniles. Regional differences characterize the appearance of osteoclasts; at thin skeletal elements (neural arches, nasal) mononucleated osteoclasts are predominant even in adults. Multinucleated bone-resorbing cells were first observed in 40-day-old animals and are the predominant osteoclast type of adults. Both mono- and multinucleated osteoclasts contribute to allometric bone growth but multinucleated osteoclasts are also involved in lacunar bone resorption and repeated bone remodeling. Resorption of the dentary follows the pattern described above (mononucleated osteoclasts precede multinucleated cells) and includes the partial removal of Meckel's cartilage. Bone marrow spaces created by resorption are usually filled with adipose tissue. In conclusion, bone resorption is primarily subjected to the demands of growth, the appearance of mono- and multinucleated osteoclasts is site- and age-related, and bone remodeling occurs. The results are discussed in relation to findings in other teleosts and in mammals.
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Affiliation(s)
- P E Witten
- Department of Biology, Dalhousie University, 1355 Oxford St., Halifax Nova Scotia, Canada B3H 4J1.
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22
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Abstract
The function of the most numerous cell in bone, the osteocyte, has until recently been mysterious and at times controversial. There is now an emerging consensus that osteocytes modulate signals arising from mechanical loading and so direct the appearance and disappearance of bone tissue at the microscopic level, which allows bone as an organ both to grow and to adapt efficiently to the body's mechanical needs for strength with lightness. Osteocytes appear to use some molecular signalling pathways that are familiar from other tissues, such as the generation of nitric oxide and prostaglandins as well as directing cell-cell communication via gap junctions. They may also direct the removal of damaged or redundant bone through mechanisms linked to their own apoptosis or via the secretion of specialised cellular attachment proteins such as osteopontin. Osteocytes possess receptors for parathyroid hormone/parathyroid hormone related peptide and both oestrogen receptors alpha and beta. They also express molecules which in nerve cells are involved with glutamate neuro-transmission. At least some of these receptors and their ligands may regulate osteocyte apoptosis and modulate osteocyte signalling.
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Affiliation(s)
- B S Noble
- University Department of Medicine, Addenbrooke's Hospital, Cambridge, UK
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