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Nakagawa H, Kuroda J, Aramaki T, Kondo S. Mechanical role of actinotrichia in shaping the caudal fin of zebrafish. Dev Biol 2021; 481:52-63. [PMID: 34537221 DOI: 10.1016/j.ydbio.2021.09.003] [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: 01/11/2021] [Revised: 08/18/2021] [Accepted: 09/10/2021] [Indexed: 11/25/2022]
Abstract
Spear-like collagen complexes, known as actinotrichia, underlie the epidermal cell layer in the tip of teleost fins and are known to contribute toward fin formation; however, their specific role remains largely unclear. In this study, we investigated of actinotrichia in the role of caudal fin formation by generating collagen9a1c (col9a1c)-knockout zebrafish. Although actinotrichia were initially produced normally and aligned correctly in the knockout fish, the number of actinotrichia decreased as the fish grew and their alignment became disordered. Simultaneously, the fin tip gradually shortened in the dorsal-ventral direction and the entire fin became oval-shaped, while the fin-rays rarely bifurcated and instead underwent fusion, suggesting that actinotrichia are essential for spreading fins dorsoventrally. Furthermore, the epithelial cells that are usually thinly spread in normal fish became spherical in the knockout fish, reducing the area covered by each cell and thus the area of the fin tip. Together, these findings suggest that the tight alignment of actinotrichia provides physical support in the dorsal-ventral direction that allows caudal fins to expand in a triangular-shape.
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Affiliation(s)
- Hibiki Nakagawa
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Junpei Kuroda
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Toshihiro Aramaki
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shigeru Kondo
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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2
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Alibardi L. Immunogold labelling reveals intense distribution of hyaluronate in the regenerating fin blastema of the goldfish. ACTA ZOOL-STOCKHOLM 2020. [DOI: 10.1111/azo.12321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova and Department of Biology University of Bologna Bologna Italy
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3
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Patel S, Ranadive I, Desai I, Balakrishnan S. Regeneration of caudal fin in Poecilia latipinna: Insights into the progressive tissue morphogenesis. Organogenesis 2019; 15:35-42. [PMID: 31331233 DOI: 10.1080/15476278.2019.1633168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Studies using fish fin as a model to understand the nuance of epimorphosis are gaining interest of lately. This study illustrates for the first time the daily changes in the tissue architecture of regenerating tail fin of Poecilia latipinna. Wound epithelium is formed within 24 hpa that eventually gets stratified into apical epithelial cap by 48 hpa. In the subsequent day, proliferating cells accumulate in front of each fin-ray marking the beginning of blastema. Distally these cells express signs of cartilage condensation by 4 dpa. However, ossification and subsequent transformation of actinotrichia to lepidotrichia was observed on 5 dpa. Subsequently, the regenerate grew at variable rate until it achieved the original size on 25 dpa. This result would serve as a worthwhile standard reference for further explorative studies that demand manipulation of a regulatory signal at a defined time point.
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Affiliation(s)
- Sonam Patel
- a Department of Zoology, Faculty of Science, The M. S. University of Baroda , Vadodara , India
| | - Isha Ranadive
- a Department of Zoology, Faculty of Science, The M. S. University of Baroda , Vadodara , India
| | - Isha Desai
- b Department of Biological Sciences, N. V. Patel College of Pure and Applied Sciences , Anand , India
| | - Suresh Balakrishnan
- a Department of Zoology, Faculty of Science, The M. S. University of Baroda , Vadodara , India
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4
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Patel S, Ranadive I, Rajaram S, Desai I, Balakrishnan S. Ablation of BMP signaling hampers the blastema formation in Poecilia latipinna by dysregulating the extracellular matrix remodeling and cell cycle turnover. ZOOLOGY 2019; 133:17-26. [PMID: 30979387 DOI: 10.1016/j.zool.2019.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 12/25/2022]
Abstract
Bone morphogenetic proteins play a pivotal role in the epimorphic regeneration in vertebrates. Blastema formation is central to the epimorphic regeneration and crucially determines its fate. Despite an elaborate understanding of importance of Bone morphogenetic protein signaling in regeneration, its specific role during the blastema formation remains to be addressed. Regulatory role of BMP signaling during blastema formation was investigated using LDN193189, a potent inhibitor of BMP receptors. The study involved morphological observation, in vivo proliferation assay by incorporation of BrdU, comet assay, qRT-PCR and western blot. Blastemal outgrowth was seen reduced due to LDN193189 treatment, typified by dimensional differences, reduced number of proliferating cells and decreased levels of PCNA. Additionally, proapoptotic markers were found to be upregulated signifying a skewed cellular turnover. Further, the cell migration was seen obstructed and ECM remodeling was disturbed as well. These findings were marked by differential transcript as well as protein expressions of the key signaling and regulatory components, their altered enzymatic activities and other microscopic as well as molecular characterizations. Our results signify, for the first time, that BMP signaling manifests its effect on blastema formation by controlling the pivotal cellular processes possibly via PI3K/AKT. Our results indicate the pleiotropic role of BMPs specifically during blastema formation in regulating cell migration, cell proliferation and apoptosis, and lead to the generation of a molecular regulatory map of determinative molecules.
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Affiliation(s)
- Sonam Patel
- Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Isha Ranadive
- Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Shailja Rajaram
- Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Isha Desai
- N. V. Patel College of Pure and Applied Sciences, Vallabh Vidya Nagar, Anand, Gujarat, India
| | - Suresh Balakrishnan
- Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India.
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5
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Intercellular pathways from the vasculature to the forming bone in the zebrafish larval caudal fin: Possible role in bone formation. J Struct Biol 2019; 206:139-148. [PMID: 30858049 DOI: 10.1016/j.jsb.2019.02.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 02/23/2019] [Accepted: 02/25/2019] [Indexed: 11/20/2022]
Abstract
The pathway of ion supply from the source to the site of bone deposition in vertebrates is thought to involve transport through the vasculature, followed by ion concentration in osteoblasts. The cells deposit a precursor mineral phase in vesicles, which are then exocytosed into the extracellular matrix. We observed that the entire skeleton of zebrafish larvae, is labelled within minutes after injection of calcein or FITC-dextran into the blood. This raised the possibility that there is an additional pathway of solute transport that can account for the rapid labelling. We used cryo-FIB-SEM serial block face imaging to reconstruct at high resolution the 3D ultrastructure of the caudal tail of the zebrafish larva. This reconstruction clearly shows that there is a continuous intercellular pathway from the artery to the forming bone, and from the forming bone to the vein. Fluorescence light microscopy shows that calcein and FITC-dextran form a reticulate network pattern in this tissue, which we attribute to the dye being present in the intercellular space. We conclude that this intercellular continuous space may be a supply route for ions, mineral and other solute or particulate material to the fast forming bone.
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6
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Kuroda J, Iwane AH, Kondo S. Roles of basal keratinocytes in actinotrichia formation. Mech Dev 2018; 153:54-63. [PMID: 30194970 DOI: 10.1016/j.mod.2018.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 08/21/2018] [Accepted: 08/22/2018] [Indexed: 12/31/2022]
Abstract
The embryonic fins and the tip of adult fins of teleost fish are supported by rows of straight, unmineralized fibrils called actinotrichia. The proximal ends of the actinotrichia are bundled and the mineralized bones called lepidotrichia are made along them. Since malformation in actinotrichia causes wavy fin bones, the correct configuration of actinotrichia is essential for the correct construction of the fin shape. Past studies suggested that two types of cells, basal keratinocytes, and mesenchymal cells involve in the formation of actinotrichia. However, the mechanism how these cells contribute is unknown. In this study, we elucidated the role of basal keratinocytes in actinotrichia formation. First, we developed the imaging tool that specifically visualizes the basal keratinocytes and actinotrichia. Then, we established the in vitro culture method of the basal keratinocytes and found that the keratinocytes developed fine needle-like structures in it. The TEM image of them showed the specific shadow pattern of actinotrichia, indicating that the fine needle-like structures are the newly made actinotrichia. Finally, we cultured the basal keratinocytes with mature actinotrichia and observed that the basal keratinocytes actively holded actinotrichia with their membrane, and often generated a linear array of cells holding a single actinotrichium. This behavior suggested a mechanism with which long actinotrichia are made by relatively small cells. Our results clarified the role of basal keratinocyte and provided a novel insight into understanding the mechanism of actinotrichia formation.
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Affiliation(s)
- Junpei Kuroda
- Graduate School of Frontier Biosciences, Osaka University, Yamada-oka 1-3, Suita, Osaka 565-0871, Japan
| | - Atsuko H Iwane
- Graduate School of Frontier Biosciences, Osaka University, Yamada-oka 1-3, Suita, Osaka 565-0871, Japan; Biosystems Dynamics Center, Riken, Kagamiyama 3-10-23, Higashi Hiroshima, Hiroshima 739-0046, Japan
| | - Shigeru Kondo
- Graduate School of Frontier Biosciences, Osaka University, Yamada-oka 1-3, Suita, Osaka 565-0871, Japan.
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7
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McMillan SC, Zhang J, Phan HE, Jeradi S, Probst L, Hammerschmidt M, Akimenko MA. A regulatory pathway involving retinoic acid and calcineurin demarcates and maintains joint cells and osteoblasts in regenerating fin. Development 2018; 145:dev.161158. [PMID: 29752384 DOI: 10.1242/dev.161158] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 05/01/2018] [Indexed: 12/21/2022]
Abstract
During zebrafish fin regeneration, blastema cells lining the epidermis differentiate into osteoblasts and joint cells to reconstruct the segmented bony rays. We show that osteoblasts and joint cells originate from a common cell lineage, but are committed to different cell fates. Pre-osteoblasts expressing runx2a/b commit to the osteoblast lineage upon expressing sp7, whereas the strong upregulation of hoxa13a correlates with a commitment to a joint cell type. In the distal regenerate, hoxa13a, evx1 and pthlha are sequentially upregulated at regular intervals to define the newly identified presumptive joint cells. Presumptive joint cells mature into joint-forming cells, a distinct cell cluster that maintains the expression of these factors. Analysis of evx1 null mutants reveals that evx1 is acting upstream of pthlha and downstream of or in parallel with hoxa13a Calcineurin activity, potentially through the inhibition of retinoic acid signaling, regulates evx1, pthlha and hoxa13a expression during joint formation. Furthermore, retinoic acid treatment induces osteoblast differentiation in mature joint cells, leading to ectopic bone deposition in joint regions. Overall, our data reveal a novel regulatory pathway essential for joint formation in the regenerating fin.
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Affiliation(s)
- Stephanie C McMillan
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada K1N 6N5.,CAREG, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5
| | - Jing Zhang
- CAREG, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5.,Department of Biology, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5
| | - Hue-Eileen Phan
- CAREG, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5.,Department of Biology, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5
| | - Shirine Jeradi
- Institute for Developmental Biology, Cologne University, Cologne 50674, Germany.,Institut Polytechnique Privé, Université Libre de Tunis, Tunis 1003, Tunisia
| | - Leona Probst
- CAREG, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5.,Department of Biology, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5
| | | | - Marie-Andrée Akimenko
- CAREG, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5 .,Department of Biology, 30 Marie Curie, University of Ottawa, Ottawa, ON, Canada K1N 6N5
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8
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Armstrong BE, Henner A, Stewart S, Stankunas K. Shh promotes direct interactions between epidermal cells and osteoblast progenitors to shape regenerated zebrafish bone. Development 2017; 144:1165-1176. [PMID: 28351866 DOI: 10.1242/dev.143792] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 01/28/2017] [Indexed: 01/08/2023]
Abstract
Zebrafish innately regenerate amputated fins by mechanisms that expand and precisely position injury-induced progenitor cells to re-form tissue of the original size and pattern. For example, cell signaling networks direct osteoblast progenitors (pObs) to rebuild thin cylindrical bony rays with a stereotypical branched morphology. Hedgehog/Smoothened (Hh/Smo) signaling has been variably proposed to stimulate overall fin regenerative outgrowth or promote ray branching. Using a photoconvertible patched2 reporter, we resolve active Hh/Smo output to a narrow distal regenerate zone comprising pObs and adjacent motile basal epidermal cells. This Hh/Smo activity is driven by epidermal Sonic hedgehog a (Shha) rather than Ob-derived Indian hedgehog a (Ihha), which nevertheless functions atypically to support bone maturation. Using BMS-833923, a uniquely effective Smo inhibitor, and high-resolution imaging, we show that Shha/Smo is functionally dedicated to ray branching during fin regeneration. Hh/Smo activation enables transiently divided clusters of Shha-expressing epidermis to escort pObs into similarly split groups. This co-movement likely depends on epidermal cellular protrusions that directly contact pObs only where an otherwise occluding basement membrane remains incompletely assembled. Progressively separated pObs pools then continue regenerating independently to collectively re-form a now branched skeletal structure.
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Affiliation(s)
- Benjamin E Armstrong
- Institute of Molecular Biology, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA.,Department of Chemistry and Biochemistry, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA
| | - Astra Henner
- Institute of Molecular Biology, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA
| | - Scott Stewart
- Institute of Molecular Biology, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA
| | - Kryn Stankunas
- Institute of Molecular Biology, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA .,Department of Biology, University of Oregon, 297A Klamath Hall, 1370 Franklin Blvd, Eugene, OR 97403, USA
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9
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König D, Page L, Chassot B, Jaźwińska A. Dynamics of actinotrichia regeneration in the adult zebrafish fin. Dev Biol 2017; 433:416-432. [PMID: 28760345 DOI: 10.1016/j.ydbio.2017.07.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/25/2017] [Accepted: 07/27/2017] [Indexed: 01/21/2023]
Abstract
The skeleton of adult zebrafish fins comprises lepidotrichia, which are dermal bones of the rays, and actinotrichia, which are non-mineralized spicules at the distal margin of the appendage. Little is known about the regenerative dynamics of the actinotrichia-specific structural proteins called Actinodins. Here, we used immunofluorescence analysis to determine the contribution of two paralogous Actinodin proteins, And1/2, in regenerating fins. Both proteins were detected in the secretory organelles in the mesenchymal cells of the blastema, but only And1 was detected in the epithelial cells of the wound epithelium. The analysis of whole mount fins throughout the entire regenerative process and longitudinal sections revealed that And1-positive fibers are complementary to the lepidotrichia. The analysis of another longfin fish, a gain-of-function mutation in the potassium channel kcnk5b, revealed that the long-fin phenotype is associated with an extended size of actinotrichia during homeostasis and regeneration. Finally, we investigated the role of several signaling pathways in actinotrichia formation and maintenance. This revealed that the pulse-inhibition of either TGFβ/Activin-βA or FGF are sufficient to impair deposition of Actinodin during regeneration. Thus, the dynamic turnover of Actinodin during fin regeneration is regulated by multiple factors, including the osteoblasts, growth rate in a potassium channel mutant, and instructive signaling networks between the epithelium and the blastema of the regenerating fin.
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Affiliation(s)
- Désirée König
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - Lionel Page
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - Bérénice Chassot
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - Anna Jaźwińska
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland.
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10
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Duran I, Csukasi F, Taylor S, Krakow D, Becerra J, Bombarely A, Marí-Beffa M. Collagen duplicate genes of bone and cartilage participate during regeneration of zebrafish fin skeleton. Gene Expr Patterns 2015; 19:60-9. [DOI: 10.1016/j.gep.2015.07.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/14/2015] [Accepted: 07/31/2015] [Indexed: 11/17/2022]
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11
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Ochandio BS, Bechara IJ, Parise-Maltempi PP. Dexamethasone action on caudal fin regeneration of carp Cyprinus carpio (Linnaeus, 1758). BRAZ J BIOL 2015; 75:442-50. [DOI: 10.1590/1519-6984.16813] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 12/13/2013] [Indexed: 11/22/2022] Open
Abstract
Studies have demonstrated that the prolonged use of corticoids can delay the healing process, affecting re-epithelialization, neovascularization and collagen synthesis. As the fins of teleost fish contain a large amount of collagen, the aim of the present study was to investigate the effect of dexamethasone (anti-inflammatory and glucocorticoid steroid widely used in the treatment of rheumatic diseases) during the regeneration process in the caudal fin of specimens of carp (Cyprinus carpio). For such, two glass aquaria were used – one for a group of fish treated with dexamethasone (Henrifarma) in a 20 mg/L concentration and the other for the control group. The caudal fins were amputated transversally and fish remained in their respective aquaria until regeneration occurred. Samples of regenerating fins were collected on days 1, 2, 4, 6, 8 and 10 after amputation. The fins in the control group regenerated normally and grew within the expected in time course. The fins in the group treated with dexamethasone were significantly smaller in comparison to the control group at every evaluation time. Thus, it was possible to verify that, at this concentration of dexamethasone, the regeneration of the caudal fins was delayed, but not completely inhibited. The results show that the caudal fin is a good model for histological studies on regeneration and the action of drug toxicity, but it’s also of great importance the interaction with further studies for a better knowledge and understanding of all the changes in all the phases.
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Affiliation(s)
- BS. Ochandio
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Brazil
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12
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Duran I, Ruiz-Sánchez J, Santamaría JA, Marí-Beffa M. Holmgren's principle of delamination during fin skeletogenesis. Mech Dev 2014; 135:16-30. [PMID: 25460362 DOI: 10.1016/j.mod.2014.11.002] [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: 05/01/2014] [Revised: 11/12/2014] [Accepted: 11/14/2014] [Indexed: 10/24/2022]
Abstract
During fin morphogenesis, several mesenchyme condensations occur to give rise to the dermal skeleton. Although each of them seems to create distinctive and unique structures, they all follow the premises of the same morphogenetic principle. Holmgren's principle of delamination was first proposed to describe the morphogenesis of skeletal elements of the cranium, but Jarvik extended it to the development of the fin exoskeleton. Since then, some cellular or molecular explanations, such as the "flypaper" model (Thorogood et al.), or the evolutionary description by Moss, have tried to clarify this topic. In this article, we review new data from zebrafish studies to meet these criteria described by Holmgren and other authors. The variety of cell lineages involved in these skeletogenic condensations sheds light on an open discussion of the contributions of mesoderm- versus neural crest-derived cell lineages to the development of the head and trunk skeleton. Moreover, we discuss emerging molecular studies that are disclosing conserved regulatory mechanisms for dermal skeletogenesis and similarities during fin development and regeneration, which may have important implications in the potential use of the zebrafish fin as a model for regenerative medicine.
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Affiliation(s)
- I Duran
- Laboratory of Bioengineering and Tissue Regeneration (LABRET), Department of Cell Biology, Genetics and Physiology, Biomedical Research Institute of Málaga (IBIMA), Faculty of Sciences, University of Málaga, 29071 Málaga, Spain; Department of Orthopedic Surgery, University of California, Los Angeles, CA 90095, USA; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 29071 Málaga, Spain.
| | - J Ruiz-Sánchez
- Laboratory of Bioengineering and Tissue Regeneration (LABRET), Department of Cell Biology, Genetics and Physiology, Biomedical Research Institute of Málaga (IBIMA), Faculty of Sciences, University of Málaga, 29071 Málaga, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 29071 Málaga, Spain
| | - J A Santamaría
- Laboratory of Bioengineering and Tissue Regeneration (LABRET), Department of Cell Biology, Genetics and Physiology, Biomedical Research Institute of Málaga (IBIMA), Faculty of Sciences, University of Málaga, 29071 Málaga, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 29071 Málaga, Spain
| | - M Marí-Beffa
- Laboratory of Bioengineering and Tissue Regeneration (LABRET), Department of Cell Biology, Genetics and Physiology, Biomedical Research Institute of Málaga (IBIMA), Faculty of Sciences, University of Málaga, 29071 Málaga, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 29071 Málaga, Spain.
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13
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14
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Inhibition of caudal fin regeneration in Corydoras aeneus by lithium chloride. Micron 2013; 46:66-75. [DOI: 10.1016/j.micron.2012.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 12/17/2012] [Accepted: 12/27/2012] [Indexed: 12/29/2022]
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15
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Böckelmann PK, Bechara IJ. Influence of indomethacin on the regenerative process of the tail fin of teleost: morphometric and ultrastructural analysis. BRAZ J BIOL 2011; 70:889-97. [PMID: 21085794 DOI: 10.1590/s1519-69842010000400020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Accepted: 02/24/2010] [Indexed: 11/21/2022] Open
Abstract
When partially amputated or severely injured, teleost fins suffer a regenerative process called epimorphic regeneration characterised by the following stages: the formation of a multistratified epidermal layer, the disorganisation and distal migration of multipotent mesenchymal cells, the proliferation of these cells in order to form the blastema, continuous proliferation of distal blastema to facilitate the growth, and differentiation of the proximal blastema in order to restore its lost structure. The regeneration of the fin is extremely sensitive to the action of some drugs that can interfere in its structure restoration. For this reason, and also based on papers relating that indomethacin can interfere somehow in the tissue restoration of many different organisms, the aim of this work is to evaluate the possible effects of this drug in three different doses in the regeneration of the teleost fish tail fin, taking into consideration the synthesis, the disposition and organisation of lepidotrichial matrix components, the restoration of actinotrichia, as well as the fin area itself. Therefore, histochemical, ultrastructural and morphometric analysis were done and it was observed that indomethacin in doses of 20 and 30 mg.L-1 caused a delay in the regenerative process of the dermal skeleton (lepidotrichia and actinotrichia) of the tail fins. These doses could have interfered, momentarily, in the process of blastemal cell differentiation in the cells responsible for the synthesis and disposition of actinotrichia and lepidotrichia or, even interfered in the signalling necessary for the recent differentiated cells to begin synthesising the components of the dermal skeleton.
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Affiliation(s)
- P K Böckelmann
- Departamento de Histologia e Embriologia, Instituto de Biologia – IB, Universidade Estadual de Campinas – UNICAMP, CP 6109, CEP 13083-970, Campinas, SP, Brazil
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16
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Durán I, Marí-Beffa M, Santamaría JA, Becerra J, Santos-Ruiz L. Actinotrichia collagens and their role in fin formation. Dev Biol 2011; 354:160-72. [PMID: 21420398 DOI: 10.1016/j.ydbio.2011.03.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 02/15/2011] [Accepted: 03/10/2011] [Indexed: 11/17/2022]
Abstract
The skeleton of zebrafish fins consists of lepidotrichia and actinotrichia. Actinotrichia are fibrils located at the tip of each lepidotrichia and play a morphogenetic role in fin formation. Actinotrichia are formed by collagens associated with non-collagen components. The non-collagen components of actinotrichia (actinodins) have been shown to play a critical role in fin to limb transition. The present study has focused on the collagens that form actinotrichia and their role in fin formation. We have found actinotrichia are formed by Collagen I plus a novel form of Collagen II, encoded by the col2a1b gene. This second copy of the collagen II gene is only found in fishes and is the only Collagen type II expressed in fins. Both col1a1a and col2a1b were found in actinotrichia forming cells. Significantly, they also expressed the lysyl hydroxylase 1 (lh1) gene, which encodes an enzyme involved in the post-translational processing of collagens. Morpholino knockdown in zebrafish embryos demonstrated that the two collagens and lh1 are essential for actinotrichia and fin fold morphogenesis. The col1a1 dominant mutant chihuahua showed aberrant phenotypes in both actinotrichia and lepidotrichia during fin development and regeneration. These pieces of evidences support that actinotrichia are composed of Collagens I and II, which are post-translationally processed by Lh1, and that the correct expression and assembling of these collagens is essential for fin formation. The unique collagen composition of actinotrichia may play a role in fin skeleton morphogenesis.
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Affiliation(s)
- I Durán
- Department of Cell Biology, Genetics and Physiology, Faculty of Science, University of Málaga, Málaga, Spain.
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17
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Abstract
Zebrafish fins have a proximal skeleton of endochondral bones and a distal skeleton of dermal bones. Recent experimental and genetic studies are discovering mechanisms to control fin skeleton morphogenesis. Whereas the endochondral skeleton has been extensively studied, the formation of the dermal skeleton requires further revision. The shape of the dermal skeleton of the fin is generated in its distal growing margin and along a proximal growing domain. In these positions, dermoskeletal fin morphogenesis can be explained by intertissue interactions and the function of several genetic pathways. These pathways regulate patterning, size, and cell differentiation along three axes. Finally, a common genetic control of late development, regeneration, and tissue homeostasis of the fin dermoskeleton is currently being analyzed. These pathways may be responsible for the similar shape obtained after each morphogenetic process. This provides an interesting conceptual framework for future studies on this topic. Developmental Dynamics 239:2779–2794, 2010. © 2010 Wiley-Liss, Inc.
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Affiliation(s)
- Manuel Marí-Beffa
- Department of Cell Biology, Genetics and Physiology, Faculty of Science, University of Málaga, and Biomedical Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Málaga, Spain.
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18
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Beraldo P, Canavese B. Recovery of opercular anomalies in gilthead sea bream, Sparus aurata L.: morphological and morphometric analysis. JOURNAL OF FISH DISEASES 2011; 34:21-30. [PMID: 21166823 DOI: 10.1111/j.1365-2761.2010.01206.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Opercular anomalies are very frequent in reared gilthead sea bream and these can negatively influence the product value. Field observations have suggested that opercular malformations can recover over time. In order to verify this hypothesis, 140-day-old gilthead sea bream with monolateral opercular anomalies were divided into three groups, according to the type and increasing seriousness of the opercular malformations, and another group was composed of fish with bilateral opercular anomalies. All groups were monitored for 16 months. In the group with monolateral anomalies, the opercular recovery process was documented by morphological (stereomicroscope) and morphometric analysis. For the latter analysis, two relevant areas, A and T, were identified in the cephalic region. The ratio (T - A)/T, tending to 1, represents the recovery index (RI) of anatomical integrity and quantifies the recovery level of opercular complex anomalies. Results suggested that the recovery process was considerable over the 16 months of investigation but should not be considered complete. At the end of the study, 61% of the gilthead sea bream population with monolateral opercular defects recovered external integrity, whereas the population with bilateral defects showed a poorer recovery capability.
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Affiliation(s)
- P Beraldo
- Department of Animal Science, Section of Biology and Animal Pathology, University of Udine, Udine, Italy.
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19
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Böckelmann PK, Ochandio BS, Bechara IJ. Histological study of the dynamics in epidermis regeneration of the carp tail fin (Cyprinus carpio, Linnaeus, 1758). BRAZ J BIOL 2010; 70:217-23. [DOI: 10.1590/s1519-69842010000100030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Accepted: 03/26/2009] [Indexed: 11/22/2022] Open
Abstract
Teleostean fins when partially amputated suffer a regenerative process called epimorphic regeneration, characterized by the following stages: healing, based on the formation of a multistratified epidermal layer, the formation of a mass of pluripotent cells known as blastema, the differentiation of these cells, the synthesis and disposition of the extracellular matrix, morphological growth and restoration. The epidermis has a fundamental role in the regenerative process of fish fins, as the healing time of this structure leads it to a faster regenerative process and it also works as a defense against the external environment. In this sense, due to the fast regeneration shown by the epidermis, the aim of this paper is to study the histology of the regenerative dynamics of the carp fin tail (Cyprinus carpio), under the light and transmission electron microscope. Epidermic regeneration begins right in the first hours after the fin amputation and it continues throughout the regenerative process. After 24 hours, an apical epidermal cap is established. Cytoplasmatic prolongations and intercellular junctions are observed and the cells of the basal layer of the epidermis change from the cubic form to the cylindrical, due to the development of the cytoplasmatic organelles responsible for the synthesis of the basal membrane, lost after amputation. These results show the importance of histological studies in regenerative processes. We believe that the association of molecular biology with histological studies can throw further light onto these regenerative dynamics.
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Affiliation(s)
| | - BS. Ochandio
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
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20
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Böckelmann PK, Bechara IJ. The regeneration of the tail fin actinotrichia of carp (Cyprinus carpio, Linnaeus, 1758) under the action of naproxen. BRAZ J BIOL 2009; 69:1165-72. [PMID: 19967189 DOI: 10.1590/s1519-69842009000500022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Accepted: 09/19/2008] [Indexed: 11/21/2022] Open
Abstract
A conglomerate of small, rigid, fusiform spicules known as actinotrichia sustains the edge of tail fins of teleost. After amputation, these structures show an extremely fast regenerative capacity. In this study we observed the effect of a nonsteroidal anti-inflammatory drug, naproxen, used in the treatment of degenerative articular diseases, during the process of actinotrichia regeneration. For this purpose, regenerating tissue from animals in contact with the drug was submitted to histochemical and ultrastructural analysis in comparison to tissue from animals under normal conditions, i.e., not in contact with the drug in question. Actinotrichia regeneration was similar in both animals, indicating that naproxen, at the dose used in the present study, did not interfere with actinotrichia synthesis during the regenerative process of the tail fin. This could be because naproxen did not influence the expression of the genes required for the regeneration process, such as the Sonic hedgehog (Shh) gene, which is involved in actinotrichia formation.
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Affiliation(s)
- P K Böckelmann
- Departamento de Histologia e Embriologia, Instituto de Biologia, Universidade Estadual de Campinas, SP, Brazil
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21
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Smith A, Zhang J, Guay D, Quint E, Johnson A, Akimenko MA. Gene expression analysis on sections of zebrafish regenerating fins reveals limitations in the whole-mount in situ hybridization method. Dev Dyn 2008; 237:417-25. [PMID: 18163531 DOI: 10.1002/dvdy.21417] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The caudal fin of adult zebrafish is used to study the molecular mechanisms that govern regeneration processes. Most reports of gene expression in regenerating caudal fins rely on in situ hybridization (ISH) on whole-mount samples followed by sectioning of the samples. In such reports, expression is mostly confined to cells other than those located between the dense collagenous structures that are the actinotrichia and lepidotrichia. Here, we re-examined the expression of genes by performing ISH directly on cryo-sections of regenerates. We detected expression of some of these genes in cell types that appeared to be non-expressing when ISH was performed on whole-mount samples. These results demonstrate that ISH reagents have a limited capacity to penetrate between the regenerating skeletal matrices and suggest that ISH performed directly on fin sections is a preferable method to study gene expression in fin regenerates.
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Affiliation(s)
- A Smith
- Ottawa Health Research Institute, Ottawa, ON, Canada
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22
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Nishidate M, Nakatani Y, Kudo A, Kawakami A. Identification of novel markers expressed during fin regeneration by microarray analysis in medaka fish. Dev Dyn 2007; 236:2685-93. [PMID: 17676638 DOI: 10.1002/dvdy.21274] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Urodeles and fish have a remarkable ability to regenerate lost body parts, whereas many higher vertebrates, including mammals, retain only a limited capacity. It is known that the formation of specialized cell populations such as the wound epidermis or blastema is crucial for regeneration; however, the molecular basis for their formation has not been elucidated. Recently, approaches using differential display and microarray have been done in zebrafish for searching molecules involved in regeneration. Here, we used the medaka fish, a distantly diverged fish species, for microarray screening of transcripts up-regulated during regeneration. By setting criteria for selecting transcripts that are reliably and reproducibly up-regulated during regeneration, we identified 140 transcripts. Of them, localized in situ expression of 12 transcripts of 22 tested was detected either in differentiating cartilage, basal wound epidermis, or blastema. Our results provide useful molecular markers for dissecting the regeneration process at a fine cellular resolution.
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Affiliation(s)
- Masanobu Nishidate
- Department of Biological Information, Tokyo Institute of Technology, Yokohama, Japan
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23
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Murciano C, Pérez-Claros J, Smith A, Avaron F, Fernández TD, Durán I, Ruiz-Sánchez J, García F, Becerra J, Akimenko MA, Marí-Beffa M. Position dependence of hemiray morphogenesis during tail fin regeneration in Danio rerio. Dev Biol 2007; 312:272-83. [PMID: 17977526 DOI: 10.1016/j.ydbio.2007.09.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Revised: 09/09/2007] [Accepted: 09/14/2007] [Indexed: 11/27/2022]
Abstract
The fins of actinopterygian can regenerate following amputation. Classical papers have shown that the ray, a structural unit of these fins, might regenerate independent of this appendage. Each fin ray is formed by two apposed contralateral hemirays. A hemiray may autonomously regenerate and segmentate in a position-independent manner. This is observed when heterotopically grafted into an interray space, after amputation following extirpation of the contralateral hemiray or when simply ablated. During this process, a proliferating hemiblastema is formed, as shown by bromodeoxyuridine incorporation, from which the complete structure will regenerate. This hemiblastema shows a patterning of gene expression domain similar to half ray blastema. Interactions between contralateral hemiblastema have been studied by recombinant rays composed of hemirays from different origins on the proximo-distal or dorso-ventral axis of the caudal fin. Dye 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocianine perchlorate labeling of grafted tissues was used as tissular marker. Our results suggest both that there are contralateral interactions between hemiblastema of each ray, and that hemiblastema may vary its morphogenesis, always differentiating as their host region. These non-autonomous, position-dependent interactions control coordinated bifurcations, segment joints and ray length independently. A morphological study of the developing and regenerating fin of another long fin mutant zebrafish suggests that contralateral hemiblastema interactions are perturbed in this mutant.
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Affiliation(s)
- C Murciano
- Department of Cell Biology, Genetics and Physiology, Faculty of Science, University of Málaga, 29071-Málaga, Spain
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24
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Stoick-Cooper CL, Moon RT, Weidinger G. Advances in signaling in vertebrate regeneration as a prelude to regenerative medicine. Genes Dev 2007; 21:1292-315. [PMID: 17545465 DOI: 10.1101/gad.1540507] [Citation(s) in RCA: 230] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
While all animals have evolved strategies to respond to injury and disease, their ability to functionally recover from loss of or damage to organs or appendages varies widely damage to skeletal muscle, but, unlike amphibians and fish, they fail to regenerate heart, lens, retina, or appendages. The relatively young field of regenerative medicine strives to develop therapies aimed at improving regenerative processes in humans and is predicated on >40 years of success with bone marrow transplants. Further progress will be accelerated by implementing knowledge about the molecular mechanisms that regulate regenerative processes in model organisms that naturally possess the ability to regenerate organs and/or appendages. In this review we summarize the current knowledge about the signaling pathways that regulate regeneration of amphibian and fish appendages, fish heart, and mammalian liver and skeletal muscle. While the cellular mechanisms and the cell types involved in regeneration of these systems vary widely, it is evident that shared signals are involved in tissue regeneration. Signals provided by the immune system appear to act as triggers of many regenerative processes. Subsequently, pathways that are best known for their importance in regulating embryonic development, in particular fibroblast growth factor (FGF) and Wnt/beta-catenin signaling (as well as others), are required for progenitor cell formation or activation and for cell proliferation and specification leading to tissue regrowth. Experimental activation of these pathways or interference with signals that inhibit regenerative processes can augment or even trigger regeneration in certain contexts.
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Affiliation(s)
- Cristi L Stoick-Cooper
- Department of Pharmacology, Howard Hughes Medical Institute, and Institute for Stem Cell and Regenerative Medicine, University of Washington School of Medicine, Seattle, Washington 98195, USA
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25
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Smith A, Avaron F, Guay D, Padhi BK, Akimenko MA. Inhibition of BMP signaling during zebrafish fin regeneration disrupts fin growth and scleroblast differentiation and function. Dev Biol 2006; 299:438-54. [PMID: 16959242 DOI: 10.1016/j.ydbio.2006.08.016] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2006] [Revised: 08/04/2006] [Accepted: 08/07/2006] [Indexed: 12/17/2022]
Abstract
The zebrafish caudal fin provides a simple model to study molecular mechanisms of dermal bone regeneration. We previously showed that misexpression of Bone morphogenetic protein 2b (Bmp2b) induces ectopic bone formation within the regenerate. Here we show that in addition to bmp2b and bmp4 another family member, bmp6, is involved in fin regeneration. We further investigated the function of BMP signaling by ectopically expressing the BMP signaling inhibitor Chordin which caused: (1) inhibition of regenerate outgrowth due to a decrease of blastema cell proliferation and downregulation of msxb and msxC expression and (2) reduced bone matrix deposition resulting from a defect in the maturation and function of bone-secreting cells. We then identified targets of BMP signaling involved in regeneration of the bone of the fin rays. runx2a/b and their target col10a1 were downregulated following BMP signaling inhibition. Unexpectedly, the sox9a/b transcription factors responsible for chondrocyte differentiation were detected in the non-cartilaginous fin rays, sox9a and sox9b were not only differentially expressed but also differentially regulated since sox9a, but not sox9b, was downregulated in the absence of BMP signaling. Finally, this analysis revealed the surprising finding of the expression, in the fin regenerate, of several factors which are normally the signatures of chondrogenic elements during endochondral bone formation although fin rays form through dermal ossification, without a cartilage intermediate.
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Affiliation(s)
- A Smith
- Ottawa Health Research Institute, 725 Parkdale Avenue, Ottawa, ON, Canada K1Y4E9
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26
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Andreasen EA, Mathew LK, Löhr CV, Hasson R, Tanguay RL. Aryl hydrocarbon receptor activation impairs extracellular matrix remodeling during zebra fish fin regeneration. Toxicol Sci 2006; 95:215-26. [PMID: 17003102 DOI: 10.1093/toxsci/kfl119] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Adult zebra fish completely regenerate their caudal (tail) fin following partial amputation. Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) inhibits this regenerative process. Proper regulation of transcription, innervation, vascularization, and extracellular matrix (ECM) composition is essential for complete fin regeneration. Previous microarray studies suggest that genes involved in ECM regulation are misexpressed following activation of the aryl hydrocarbon receptor. To investigate whether TCDD blocks regeneration by impairing ECM remodeling, male zebra fish were i.p. injected with 50 ng/g TCDD or vehicle, and caudal fins were amputated. By 3 days postamputation (dpa), the vascular network in the regenerating fin of TCDD-exposed fish was disorganized compared to vehicle-exposed animals. Furthermore, immunohistochemical staining revealed that axonal outgrowth was impacted by TCDD as early as 3 dpa. Histological analysis demonstrated that TCDD exposure leads to an accumulation of collagen at the end of the fin ray just distal to the amputation site by 3 dpa. Mature lepidotrichial-forming cells (fin ray-forming cells) were not observed in the fins of TCDD-treated fish. The capacity to metabolize ECM was also altered by TCDD exposure. Quantitative real-time PCR studies revealed that the aryl hydrocarbon pathway is active and that matrix-remodeling genes are expressed in the regenerate following TCDD exposure.
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Affiliation(s)
- Eric A Andreasen
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331-7301, USA
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27
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Maginnis TL. The costs of autotomy and regeneration in animals: a review and framework for future research. Behav Ecol 2006. [DOI: 10.1093/beheco/arl010] [Citation(s) in RCA: 241] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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28
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Santos-Ruiz L, Santamaría JA, Becerra J. Cytoskeletal dynamics of the teleostean fin ray during fin epimorphic regeneration. Differentiation 2005; 73:175-87. [PMID: 15901284 DOI: 10.1111/j.1432-0436.2005.00016.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Teleost fishes can regenerate their fins by epimorphic regeneration, a process that involves the transition of the formerly quiescent tissues of the stump to an active, growing state. This involves dynamic modifications of cell phenotype and behavior that must rely on alterations of the cytoskeleton. We have studied the spatial and temporal distribution of three main components of the cytoskeleton (actin, keratin and vimentin) in the regenerating fin, in order to establish putative relationships between cell cytoskeleton and cell behavior. According to our results, the massive rearrangement undergone by the epidermis right after injury, which takes place by cell migration, correlates with a transient down-regulation of keratin and a strong up-regulation of actin in the epidermal cells. During the subsequent epidermal growth, based on cell proliferation, keratin normal pattern is recovered while actin is down-regulated, although not to normal (quiescent) levels. The epidermal basal layer in contact with the blastema displays a particular cytoskeletal profile, different to that of the rest of the epidermal cells, which reflects its special features. In the connective tissue compartment, somatic cells do not contain vimentin, but keratin, as intermediate filament. Proliferative and migrative activation of these cells after injury correlates with actin up-regulation. Although this initial activation does not involve keratin down-regulation, blastemal cells were later observed to lack keratin, suggesting that such cytoskeletal modification might be needed for connective tissue cells to dedifferentiate and form the blastema. Cell differentiation in the newly formed, regenerated ray is accompanied by actin down-regulation and keratin up-regulation.
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Affiliation(s)
- Leonor Santos-Ruiz
- Department of Cell Biology, Genetics and Physiology, Faculty of Sciences, University of Málaga, Málaga, Spain
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29
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Ashhurst DE. The cartilaginous skeleton of an elasmobranch fish does not heal. Matrix Biol 2004; 23:15-22. [PMID: 15172034 DOI: 10.1016/j.matbio.2004.02.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2003] [Revised: 02/02/2004] [Accepted: 02/02/2004] [Indexed: 10/26/2022]
Abstract
The inability of articular cartilage to heal satisfactorily is becoming, with ageing populations, an important medical problem. One question that has not been raised is whether a mechanism for the repair of cartilage evolved in animals with cartilaginous skeletons. Fin rays of dogfish were cut and the fish maintained for up to 6 months. The initial inflammatory reaction around the cut rays lasts for 2 weeks. By 4 weeks the cut ends are covered by fibrous tissue. At 12 weeks some areas of cartilage-like tissue are developing. Development of these areas continues and at 26 weeks large chondrocyte-like cells are surrounded by matrix. This tissue is in regions of poor vascularity. It does not have the typical appearance of hyaline cartilage, nor is it integrated with the cartilage of the fin rays. No changes in the cut surfaces of the fin rays are observed at any time. It is concluded that no mechanism has evolved in the elasmobranch fishes for the repair of their cartilaginous skeleton. This is discussed in relation to previous investigations of the reactions of cartilage to injury in embryonic, neonatal and adult tissues of higher vertebrates.
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Affiliation(s)
- Doreen E Ashhurst
- Department of Anatomy, St. George's Hospital Medical School, Tooting, London SW17 0RE, UK.
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30
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Nechiporuk A, Poss KD, Johnson SL, Keating MT. Positional cloning of a temperature-sensitive mutant emmental reveals a role for sly1 during cell proliferation in zebrafish fin regeneration. Dev Biol 2003; 258:291-306. [PMID: 12798289 DOI: 10.1016/s0012-1606(03)00129-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Here, we used classical genetics in zebrafish to identify temperature-sensitive mutants in caudal fin regeneration. Gross morphological, histological, and molecular analyses revealed that one of these strains, emmental (emm), failed to form a functional regeneration blastema. Inhibition of emm function by heat treatment during regenerative outgrowth rapidly blocked regeneration. This block was associated with reduced proliferation in the proximal blastema and expansion of the nonproliferative distal blastemal zone. Positional cloning revealed that the emm phenotype is caused by a mutation in the orthologue of yeast sly1, a gene product involved in protein trafficking. sly1 is upregulated in the newly formed blastema as well as during regenerative outgrowth. Thus, sly1 is essential for blastemal organization and proliferation during two stages of fin regeneration.
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Affiliation(s)
- Alex Nechiporuk
- Howard Hughes Medical Institute, Department of Cardiology, Children's Hospital, Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.
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31
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Akimenko MA, Marí-Beffa M, Becerra J, Géraudie J. Old questions, new tools, and some answers to the mystery of fin regeneration. Dev Dyn 2003; 226:190-201. [PMID: 12557198 DOI: 10.1002/dvdy.10248] [Citation(s) in RCA: 244] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pluridisciplinary approaches led to the notion that fin regeneration is an intricate phenomenon involving epithelial-mesenchymal and reciprocal exchanges throughout the process as well as interactions between ray and interray tissue. The establishment of a blastema after fin amputation is the first event leading to the reconstruction of the missing part of the fin. Here, we review our knowledge on the origin of the blastema, its formation and growth, and of the mechanisms that control differentiation and patterning of the regenerate. Our current understanding results from studies of fin regeneration performed in various teleost fish over the past century. We also report the recent breakthroughs that have been made in the past decade with the arrival of a new model, the zebrafish, Danio rerio, which now offers the possibility to combine cytologic, molecular, and genetic analyses and open new perspectives in this field.
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32
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Santos-Ruiz L, Santamaría JA, Ruiz-Sánchez J, Becerra J. Cell proliferation during blastema formation in the regenerating teleost fin. Dev Dyn 2002; 223:262-72. [PMID: 11836790 DOI: 10.1002/dvdy.10055] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Epimorphic regeneration in teleost fins occurs through the establishment of a balanced growth state in which a blastema gives rise to all the mesenchymal cells, whereas definite areas of the epidermis proliferate leading to its extension, thus, allowing the enlargement of the whole structure. This type of regeneration involves specific mechanisms that temporally and spatially regulate cell proliferation. To understand how the blastema is formed and how this growth situation is set up, we investigated cell proliferation patterns in the regenerating fin of the goldfish Carassius auratus from the time of amputation to that of blastema formation by using proliferating cell nuclear antigen immunostaining and bromodeoxyuridine labeling. Wound closure and apical epidermal cap formation took place by epidermal migration and re-arrangement, without the contribution of cell proliferation. As soon as the apical cap had formed, the epidermis started to proliferate at its lateral surfaces, in which all layers maintained cycling for the duration of the studied process. The distal epidermal cap, on the contrary, presented very few cycling cells, and its cytoarchitecture was indicative of continuous remodeling due to ray growth. The basal layer of this epidermal cap showed a typical morphology and remained nonproliferative whilst in contact with the proliferating blastema. Proliferation in the mesenchymal compartment of the ray started far from the amputation plane. Subsequently, cycling cells approached that location, until they formed the blastema in contact with the apical epidermal cap. Differences observed between the epidermis and mesenchyma, regarding activation of the cell cycle and the establishment of proliferative patterns, suggest that differential mechanisms regulate cell proliferation in each of these compartments during the initial stages of regeneration.
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Affiliation(s)
- Leonor Santos-Ruiz
- Department of Cell Biology and Genetics, Faculty of Sciences, University of Málaga, Málaga, Spain
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33
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Poleo G, Brown CW, Laforest L, Akimenko MA. Cell proliferation and movement during early fin regeneration in zebrafish. Dev Dyn 2001; 221:380-90. [PMID: 11500975 DOI: 10.1002/dvdy.1152] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cell proliferation and cell movement during early regeneration of zebrafish caudal fins were examined by injecting BrdU and Di-I, respectively. In normal fins of adult fish, a small number of proliferating cells are observed in the epidermis only. Shortly following amputation, epithelial cells covered the wound to form the epidermal cap but did not proliferate. However, by 24 hr, epithelial cells proximal to the level of amputation were strongly labeled with BrdU. Label incorporation was also detected in a few mesenchymal cells. Proliferating cells in the basal epithelial layer were first observed at 48 hr at the level of the newly formed lepidotrichia. At 72 hr, proliferating mesenchymal cells were found distal to the plane of amputation whereas more proximal labeled cells included mainly those located between the lepidotrichia and the basal membrane. When BrdU-injected fins were allowed to regenerate for longer periods, labeled cells were observed in the apical epidermal cap, a location where cells are not thought to proliferate. This result is suggestive of cell migration. Epithelial cells, peripheral to the rays or in the tissue between adjacent rays, were labeled with Di-I and were shown to quickly migrate towards the site of amputation, the cells closer to the wound migrating faster. Amputation also triggered migration of cells of the connective tissue located between the hemirays. Although cell movement was induced up to seven segments proximal from the level of amputation, cells located within two segments from the wound provided the main contribution to the blastema. Thus, cell proliferation and migration contribute to the early regeneration of zebrafish fins.
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Affiliation(s)
- G Poleo
- Departments of Medicine and of Cellular and Molecular Medicine, Ottawa Health Research Institute at the Ottawa Hospital, University of Ottawa, Ottawa, Canada
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34
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Borday V, Thaëron C, Avaron F, Brulfert A, Casane D, Laurenti P, Géraudie J. evx1 transcription in bony fin rays segment boundaries leads to a reiterated pattern during zebrafish fin development and regeneration. Dev Dyn 2001; 220:91-8. [PMID: 11169842 DOI: 10.1002/1097-0177(2000)9999:9999<::aid-dvdy1091>3.0.co;2-j] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The dermoskeleton of zebrafish fins is composed of actinotrichia and segmented bony rays, or lepidotrichia, which grow by successive addition of distal segments. The present study shows that evx1, a new zebrafish even-skipped related gene (Thaëron et al., 2000) displays during bony ray morphogenesis, a unique repetitive expression pattern along the proximodistal axis of the fin. Whole-mount in situ hybridization performed on larvae and adult regenerating fins show that evx1 signal appears as parallel dash lines crossing the width of each developing and regenerating rays, in a ladder-like fashion. Cytological studies show that a subpopulation of bone forming cells (scleroblasts) expresses evx1 at the level of the joint between two adjacent segments except in the apical part of the differentiating ray where evx1 expression precedes the formation of the joint. This distal transcription is turned on again only when the latest differentiating segment reached its final size and might label the putative next segment boundary. This suggests the existence of a molecular mechanism controlling the periodic expression of evx1 which could be involved in the establishment of segment boundaries during fin ray morphogenesis, and could play a key role during dermal skeleton patterning.
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Affiliation(s)
- V Borday
- Laboratoire de Biologie du Développement, Université Paris 7-Denis Diderot, case 7077, 2 Place Jussieu, 75251 Paris cedex 5, France
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Alonso M, Tabata YA, Rigolino MG, Tsukamoto RY. Effect of induced triploidy on fin regeneration of juvenile rainbow trout, Oncorhynchus mykiss. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 2000; 287:493-502. [PMID: 11110163 DOI: 10.1002/1097-010x(20001201)287:7<493::aid-jez5>3.0.co;2-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Triploidy was induced in the rainbow trout in order to evaluate whether the altered numbers and sizes of triploid cells could modify fin regeneration. Amputation of one lobe of the tail fin of diploid and triploid juveniles resulted in regeneration for experimentals and controls. Nevertheless, both rate and frequency of regeneration in triploids were significantly increased as compared with diploids, a fact that can be attributed to the increased nuclear and cellular volume in a wide range of tissues, whereas the cell numbers were reduced. These data suggest that a great deal of interesting and important research could be done using triploid animals as experimental models for studying the regeneration of appendages.
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Affiliation(s)
- M Alonso
- Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, Brazil.
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Marí-Beffa M, Palmqvist P, Marín-Girón F, Montes GS, Becerra J. Morphometric study of the regeneration of individual rays in teleost tail fins. J Anat 1999; 195 ( Pt 3):393-405. [PMID: 10580854 PMCID: PMC1468008 DOI: 10.1046/j.1469-7580.1999.19530393.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The results obtained using morphometric variables which describe fin ray regeneration patterns are reported for individual fin ray amputations in the goldfish (Carassius auratus) and zebrafish (Brachydanio rerio). Classical and updated experiments are compared to verify previous morphogenetic models of cell tractions (Oster et al. 1983) or epidermis-mesenchyme induction (Saunders et al. 1959) applied to the limb of other vertebrates. Position-dependent patterns within the fin of Carassius auratus are analysed under a comparative protocol using morphometric methods. Conditions in which the apical epidermis is separated from blastema may differentiate small fin rays, thus suggesting this epidermis is involved in blastemal formation. Blastemal cells differentiating as lepidotrichia forming cells (LFCs) may also be related to morphological changes in covering epidermis. Long-range interactions from neighbouring fin ray blastemas or short-range interactions within the blastema, may be postulated through the analysis of segmentation.
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Affiliation(s)
- M Marí-Beffa
- Department of Cell Biology and Genetics, Faculty of Science, University of Málaga, Spain
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Monnot MJ, Babin PJ, Poleo G, Andre M, Laforest L, Ballagny C, Akimenko MA. Epidermal expression of apolipoprotein E gene during fin and scale development and fin regeneration in zebrafish. Dev Dyn 1999; 214:207-15. [PMID: 10090147 DOI: 10.1002/(sici)1097-0177(199903)214:3<207::aid-aja4>3.0.co;2-5] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Apolipoprotein E (apoE) plays an important role in systemic and local lipid homeostasis. We have examined the expression of apoE during morphogenesis and regeneration of paired and unpaired fins and during scale development in zebrafish (Danio rerio). In situ hybridization analysis revealed that, during embryogenesis, apoE is expressed in the epithelial cells of the median fin fold and of the pectoral fin buds. ApoE remains expressed in the elongating fin folds throughout development of the fins. During the larval to juvenile transition, apoE transcripts were present in the distal, interray and lateral epidermis of developing fins. Furthermore, as scale buds started to form, apoE was expressed in large scale domains which later, became restricted to the external posterior epidermal part of scales. A low level of transcripts could be observed at later developmental stages at these locations probably because fins and scales continue to grow throughout the animal's life. During regeneration of both pectoral and caudal fins, a marked increase in apoE expression is observed as early as 12 hours after amputation in the wound epidermis. High levels of apoE transcripts are then localized primarily in the basal cell layer of the apical epidermis. The levels of apoE expression were maximum between the second to fourth days and then progressively declined to basal level by day 14. ApoE transcripts were also observed in putative macrophages infiltrated in the mesenchymal compartment of regenerating fins a few hours after amputation. In conclusion, apoE is highly expressed in the epidermis of developing fins and scales and during fin regeneration while no expression can be detected in the skin of the trunk. ApoE may play a specific role in fin and scale differentiation at sites where important epidermo-dermal interactions occur for the elaboration of the dermal skeleton and/or for lipid uptake and redistribution within these rapidly growing structures.
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Affiliation(s)
- M J Monnot
- URA 2227 du Centre National de la Recherche Scientifique, Université Paris-Sud, Orsay, France
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Abstract
The growth and regeneration of the zebrafish fin provide yet another opportunity to exploit genetics to study important vertebrate problems. Mutants have been identified in zebrafish that affect the development of the embryonic fin, disrupt the normal growth relationship of fin and body, or disrupt the regeneration of the fin. Analysis of a regeneration mutation suggests that the developmental checkpoints that ensure developmental integrity in normal growth are absent in the early stages of regeneration. These stages correspond to the only time in fish developmental when differentiated bone cells divide.
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Affiliation(s)
- S L Johnson
- Department of Genetics, Washington University Medical School, St. Louis, Missouri 63110, USA
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Laforest L, Brown CW, Poleo G, Géraudie J, Tada M, Ekker M, Akimenko MA. Involvement of the sonic hedgehog, patched 1 and bmp2 genes in patterning of the zebrafish dermal fin rays. Development 1998; 125:4175-84. [PMID: 9753672 DOI: 10.1242/dev.125.21.4175] [Citation(s) in RCA: 120] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The signaling molecule encoded by Sonic hedgehog (shh) participates in the patterning of several embryonic structures including limbs. During early fin development in zebrafish, a subset of cells in the posterior margin of pectoral fin buds express shh. We have shown that regulation of shh in pectoral fin buds is consistent with a role in mediating the activity of a structure analogous to the zone of polarizing activity (ZPA) (Akimenko and Ekker (1995) Dev. Biol. 170, 243–247). During growth of the bony rays of both paired and unpaired fins, and during fin regeneration, there does not seem to be a region equivalent to the ZPA and one would predict that shh would play a different role, if any, during these processes specific to fish fins. We have examined the expression of shh in the developing fins of 4-week old larvae and in regenerating fins of adults. A subset of cells in the basal layer of the epidermis in close proximity to the newly formed dermal bone structures of the fin rays, the lepidotrichia, express shh, and ptc1 which is thought to encode the receptor of the SHH signal. The expression domain of ptc1 is broader than that of shh and adjacent blastemal cells releasing the dermal bone matrix also express ptc1. Further observations indicate that the bmp2 gene, in addition to being expressed in the same cells of the basal layer of the epidermis as shh, is also expressed in a subset of the ptc1-expressing cells of the blastema. Amputations of caudal fins immediately after the first branching point of the lepidotrichia, and global administration of all-trans-retinoic acid, two procedures known to cause fusion of adjacent rays, result in a transient decrease in the expression of shh, ptc1 and bmp2. The effects of retinoic acid on shh expression occur within minutes after the onset of treatment suggesting direct regulation of shh by retinoic acid. These observations suggest a role for shh, ptc1 and bmp2 in patterning of the dermoskeleton of developing and regenerating teleost fins.
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Affiliation(s)
- L Laforest
- Loeb Institute for Medical Research, Ottawa Civic Hospital, and Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, K1Y 4E9, Canada
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