1
|
Goodall J, Rincón-Camacho L, Pozzi AG. Epidermal club cells in the cardinal tetra (Paracheirodon axelrodi): Presence, distribution, and relationship to antipredator behavior. ZOOLOGY 2024; 164:126170. [PMID: 38701689 DOI: 10.1016/j.zool.2024.126170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 05/05/2024]
Abstract
Epidermal club cells (ECCs) are present in many species of teleost fish. In an attempt to justify their presence in the epidermis of fish, they have been associated with numerous functions. One proposed function is communication with conspecifics during a predation event, as these cells may passively release substances upon rupture, which may occur during predation. We identified the presence and distribution of ECCs in the body skin of adult cardinal tetra, Paracheirodon axelrodi (Schultz, 1956) and analyzed the animal's behavioral response to conspecific skin extract in a laboratory setting. The identification and distribution of ECCs in the epidermis of the animals were confirmed by conventional histology and immunohistochemistry. Our results demonstrated that: ECCs are present in the skin of the entire body; a high density is observed in the dorsal side from head to tail, in the insertion of the fins and in the epidermis covering them; and ventral distribution is less extensive and more dispersed than dorsal distribution. Treatment of P. axelrodi specimens with skin preparations of conspecifics resulted in behavioral changes in the animals: they showed erratic swimming movements, they showed avoidance of the area of stimulus application and they decreased the time spent moving. Overall, these results allow us to conclude that P. axelrodi possesses ECCs throughout the body, with a greater presence in areas of high exposure to predation events (dorsal area and fins). Animals exposed to conspecific skin extract showed a significant increase in behaviors described as anti-predatory in other species. This supports the hypothesis that ECCs may be the origin of chemical alarm cues that are passively released when skin damage occurs, alerting the rest of the group to the risk of predation.
Collapse
Affiliation(s)
- Jazmín Goodall
- Laboratorio de Neuroendocrinología y Comportamiento en Peces y Anfibios, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
| | - Laura Rincón-Camacho
- Laboratorio de Neuroendocrinología y Comportamiento en Peces y Anfibios, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina; Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA-CONICET), Pabellón II (4to piso), Ciudad Universitaria, Buenos Aires 1428, Argentina
| | - Andrea Gabriela Pozzi
- Laboratorio de Neuroendocrinología y Comportamiento en Peces y Anfibios, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina; Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA-CONICET), Pabellón II (4to piso), Ciudad Universitaria, Buenos Aires 1428, Argentina.
| |
Collapse
|
2
|
Markert SM. Studying zebrafish nervous system structure and function in health and disease with electron microscopy. Dev Growth Differ 2023; 65:502-516. [PMID: 37740826 DOI: 10.1111/dgd.12890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 09/25/2023]
Abstract
Zebrafish (Danio rerio) is a well-established model for studying the nervous system. Findings in zebrafish often inform studies on human diseases of the nervous system and provide crucial insight into disease mechanisms. The functions of the nervous system often rely on communication between neurons. Signal transduction is achieved via release of signaling molecules in the form of neuropeptides or neurotransmitters at synapses. Snapshots of membrane dynamics of these processes are imaged by electron microscopy. Electron microscopy can reveal ultrastructure and thus synaptic processes. This is crucial both for mapping synaptic connections and for investigating synaptic functions. In addition, via volumetric electron microscopy, the overall architecture of the nervous system becomes accessible, where structure can inform function. Electron microscopy is thus of particular value for studying the nervous system. However, today a plethora of electron microscopy techniques and protocols exist. Which technique is most suitable highly depends on the research question and scope as well as on the type of tissue that is examined. This review gives an overview of the electron microcopy techniques used on the zebrafish nervous system. It aims to give researchers a guide on which techniques are suitable for their specific questions and capabilities as well as an overview of the capabilities of electron microscopy in neurobiological research in the zebrafish model.
Collapse
|
3
|
Sveen LR, Robinson N, Krasnov A, Daniels RR, Vaadal M, Karlsen C, Ytteborg E, Robledo D, Salisbury S, Dagnachew B, Lazado CC, Tengs T. Transcriptomic landscape of Atlantic salmon (Salmo salar L.) skin. G3 (BETHESDA, MD.) 2023; 13:jkad215. [PMID: 37724757 PMCID: PMC10627282 DOI: 10.1093/g3journal/jkad215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 06/21/2023] [Accepted: 09/13/2023] [Indexed: 09/21/2023]
Abstract
In this study, we present the first spatial transcriptomic atlas of Atlantic salmon skin using the Visium Spatial Gene Expression protocol. We utilized frozen skin tissue from 4 distinct sites, namely the operculum, pectoral and caudal fins, and scaly skin at the flank of the fish close to the lateral line, obtained from 2 Atlantic salmon (150 g). High-quality frozen tissue sections were obtained by embedding tissue in optimal cutting temperature media prior to freezing and sectioning. Further, we generated libraries and spatial transcriptomic maps, achieving a minimum of 80 million reads per sample with mapping efficiencies ranging from 79.3 to 89.4%. Our analysis revealed the detection of over 80,000 transcripts and nearly 30,000 genes in each sample. Among the tissue types observed in the skin, the epithelial tissues exhibited the highest number of transcripts (unique molecular identifier counts), followed by muscle tissue, loose and fibrous connective tissue, and bone. Notably, the widest nodes in the transcriptome network were shared among the epithelial clusters, while dermal tissues showed less consistency, which is likely attributable to the presence of multiple cell types at different body locations. Additionally, we identified collagen type 1 as the most prominent gene family in the skin, while keratins were found to be abundant in the epithelial tissue. Furthermore, we successfully identified gene markers specific to epithelial tissue, bone, and mesenchyme. To validate their expression patterns, we conducted a meta-analysis of the microarray database, which confirmed high expression levels of these markers in mucosal organs, skin, gills, and the olfactory rosette.
Collapse
Affiliation(s)
| | - Nicholas Robinson
- Nofima, Fish Health, Tromsø NO-9291, Norway
- School of BioSciences, The University of Melbourne, Melbourne 3010, Australia
| | | | - Rose Ruiz Daniels
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
| | | | | | | | - Diego Robledo
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
| | - Sarah Salisbury
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh EH25 9RG, UK
| | | | | | | |
Collapse
|
4
|
Alesci A, Pergolizzi S, Mokhtar DM, Fumia A, Aragona M, Lombardo GP, Messina E, D'Angelo R, Lo Cascio P, Sayed RKA, Albano M, Capillo G, Lauriano ER. Morpho-structural adaptations of the integument in different aquatic organisms. Acta Histochem 2023; 125:152031. [PMID: 37075648 DOI: 10.1016/j.acthis.2023.152031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/21/2023]
Abstract
The integument acts as a barrier to protect the body from harmful pathogenic infectious agents, parasites, UV rays, trauma, and germs. The integument of invertebrates and vertebrates are structurally different: while invertebrates usually have a simple monolayer epidermis frequently covered by mucus, cuticles, or mineralized structures, vertebrates possess a multilayered epidermis with several specialized cells. This study aims to describe by morphological, histological, and immunohistochemical analyses, the morpho-structural adaptations throughout evolution of the integument of gastropod Aplysia depilans (Gmelin, 1791), ascidian Styela plicata (Lesuer, 1823), myxine hagfish Eptatretus cirrhatus (Forster, 1801) and teleost Heteropneustes fossilis (Bloch, 1794) for the first time, with special reference to sensory epidermal cells. Different types of cells could be identified that varied according to the species; including mucous cells, serous glandular cells, clavate cells, club cells, thread cells, and support cells. In all integuments of the specimens analyzed, sensory solitary cells were identified in the epidermis, immunoreactive to serotonin and calbindin. Our study provided an essential comparison of integuments, adding new information about sensory epidermal cells phylogenetic conservation and on the structural changes that invertebrates and vertebrates have undergone during evolution.
Collapse
Affiliation(s)
- Alessio Alesci
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy.
| | - Simona Pergolizzi
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| | - Doaa M Mokhtar
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut 71526, Egypt
| | - Angelo Fumia
- Department of Clinical and Experimental Medicine, University of Messina, Padiglione C, A. O. U. Policlinico "G. Martino", 98124 Messina, Italy.
| | - Marialuisa Aragona
- Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy
| | - Giorgia Pia Lombardo
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| | - Emmanuele Messina
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| | - Roberta D'Angelo
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| | - Patrizia Lo Cascio
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| | - Ramy K A Sayed
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Sohag 82524, Egypt
| | - Marco Albano
- Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy
| | - Gioele Capillo
- Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy; Institute for Marine Biological Resources and Biotechnology (IRBIM), National Research Council (CNR), Section of Messina, 98100 Messina, Italy
| | - Eugenia Rita Lauriano
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, 98166 Messina, Italy
| |
Collapse
|
5
|
Rees L, König D, Jaźwińska A. Regeneration of the dermal skeleton and wound epidermis formation depend on BMP signaling in the caudal fin of platyfish. Front Cell Dev Biol 2023; 11:1134451. [PMID: 36846592 PMCID: PMC9946992 DOI: 10.3389/fcell.2023.1134451] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 01/24/2023] [Indexed: 02/11/2023] Open
Abstract
Fin regeneration has been extensively studied in zebrafish, a genetic model organism. Little is known about regulators of this process in distant fish taxa, such as the Poeciliidae family, represented by the platyfish. Here, we used this species to investigate the plasticity of ray branching morphogenesis following either straight amputation or excision of ray triplets. This approach revealed that ray branching can be conditionally shifted to a more distal position, suggesting non-autonomous regulation of bone patterning. To gain molecular insights into regeneration of fin-specific dermal skeleton elements, actinotrichia and lepidotrichia, we localized expression of the actinodin genes and bmp2 in the regenerative outgrowth. Blocking of the BMP type-I receptor suppressed phospho-Smad1/5 immunoreactivity, and impaired fin regeneration after blastema formation. The resulting phenotype was characterized by the absence of bone and actinotrichia restoration. In addition, the wound epidermis displayed extensive thickening. This malformation was associated with expanded Tp63 expression from the basal epithelium towards more superficial layers, suggesting abnormal tissue differentiation. Our data add to the increasing evidence for the integrative role of BMP signaling in epidermal and skeletal tissue formation during fin regeneration. This expands our understanding of common mechanisms guiding appendage restoration in diverse clades of teleosts.
Collapse
Affiliation(s)
- Lana Rees
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Désirée König
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | | |
Collapse
|
6
|
Lin WY, Dharini KK, Peng CH, Lin CY, Yeh KT, Lee WC, Lin MD. Zebrafish models for glucocorticoid-induced osteoporosis. Tzu Chi Med J 2022; 34:373-380. [PMID: 36578638 PMCID: PMC9791848 DOI: 10.4103/tcmj.tcmj_80_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/10/2022] [Accepted: 06/07/2022] [Indexed: 11/30/2022] Open
Abstract
Glucocorticoid-induced osteoporosis (GIOP) is the most common form of secondary osteoporosis due to excessive or long-term glucocorticoid administration, disturbing the homeostasis between bone formation and bone resorption. The bone biology of zebrafish shares a high degree of similarities with mammals. In terms of molecular level, genes and signaling pathways related to skeletogenesis are also highly correlated between zebrafish and humans. Therefore, zebrafish have been utilized to develop multiple GIOP models. Taking advantage of the transparency of zebrafish larvae, their skeletal development and bone mineralization can be readily visualized through in vivo staining without invasive experimental handlings. Moreover, the feasibility of using scales or fin rays to study bone remodeling makes adult zebrafish an ideal model for GIOP research. Here, we reviewed current zebrafish models for GIOP research, focused on the tools and methods established for examining bone homeostasis. As an in vivo, convenient, and robust model, zebrafish have an advantage in performing high-throughput drug screening and could be used to investigate the action mechanisms of therapeutic drugs.
Collapse
Affiliation(s)
- Wen-Ying Lin
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | | | - Cheng-Huan Peng
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,Institute of Medical Science, Tzu Chi University, Hualien, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Chung-Yen Lin
- Institute of Information Science, Academia Sinica, Taipei, Taiwan
| | - Kuang-Ting Yeh
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Wen-Chih Lee
- Research Center for Global SDGs Challenges, Office of Research and Development, Tzu Chi University, Hualien, Taiwan,Address for correspondence: Dr. Wen-Chih Lee, Research Center for Global SDGs Challenges, Office of Research and Development, Tzu Chi University, 701, Zhongyang Road, Section 3, Hualien, Taiwan. E-mail:
Prof. Ming-Der Lin, Department of Molecular Biology and Human Genetics, Tzu Chi University, 701, Zhongyang Road, Section 3, Hualien, Taiwan. E-mail:
| | - Ming-Der Lin
- Institute of Medical Science, Tzu Chi University, Hualien, Taiwan,Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan,Address for correspondence: Dr. Wen-Chih Lee, Research Center for Global SDGs Challenges, Office of Research and Development, Tzu Chi University, 701, Zhongyang Road, Section 3, Hualien, Taiwan. E-mail:
Prof. Ming-Der Lin, Department of Molecular Biology and Human Genetics, Tzu Chi University, 701, Zhongyang Road, Section 3, Hualien, Taiwan. E-mail:
| |
Collapse
|
7
|
Bump RG, Goo CEA, Horton EC, Rasmussen JP. Osteoblasts pattern endothelium and somatosensory axons during zebrafish caudal fin organogenesis. Development 2022; 149:dev200172. [PMID: 35129199 PMCID: PMC8918783 DOI: 10.1242/dev.200172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/23/2021] [Indexed: 12/18/2022]
Abstract
Skeletal elements frequently associate with vasculature and somatosensory nerves, which regulate bone development and homeostasis. However, the deep, internal location of bones in many vertebrates has limited in vivo exploration of the neurovascular-bone relationship. Here, we use the zebrafish caudal fin, an optically accessible organ formed of repeating bony ray skeletal units, to determine the cellular relationship between nerves, bones and endothelium. In adult zebrafish, we establish the presence of somatosensory axons running through the inside of the bony fin rays, juxtaposed with osteoblasts on the inner hemiray surface. During development we show that the caudal fin progresses through sequential stages of endothelial plexus formation, bony ray addition, ray innervation and endothelial remodeling. Surprisingly, the initial stages of fin morphogenesis proceed normally in animals lacking either fin endothelium or somatosensory nerves. Instead, we find that sp7+ osteoblasts are required for endothelial remodeling and somatosensory axon innervation in the developing fin. Overall, this study demonstrates that the proximal neurovascular-bone relationship in the adult caudal fin is established during fin organogenesis and suggests that ray-associated osteoblasts pattern axons and endothelium.
Collapse
Affiliation(s)
- Rosalind G. Bump
- Department of Biology, University of Washington, Seattle, WA 98195, USA
- Molecular and Cellular Biology Program, University of Washington, Seattle, WA 98195, USA
| | - Camille E. A. Goo
- Department of Biology, University of Washington, Seattle, WA 98195, USA
| | - Emma C. Horton
- Department of Biology, University of Washington, Seattle, WA 98195, USA
| | - Jeffrey P. Rasmussen
- Department of Biology, University of Washington, Seattle, WA 98195, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| |
Collapse
|
8
|
Dagenais P, Blanchoud S, Pury D, Pfefferli C, Aegerter-Wilmsen T, Aegerter CM, Jaźwińska A. Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin. J Exp Biol 2021; 224:271142. [PMID: 34338301 DOI: 10.1242/jeb.242309] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 06/14/2021] [Indexed: 01/23/2023]
Abstract
Understanding how extrinsic factors modulate genetically encoded information to produce a specific phenotype is of prime scientific interest. In particular, the feedback mechanism between abiotic forces and locomotory organs during morphogenesis to achieve efficient movement is a highly relevant example of such modulation. The study of this developmental process can provide unique insights on the transduction of cues at the interface between physics and biology. Here, we take advantage of the natural ability of adult zebrafish to regenerate their amputated fins to assess its morphogenic plasticity upon external modulations. Using a variety of surgical and chemical treatments, we could induce phenotypic responses to the structure of the fin. Through the ablation of specific rays in regenerating caudal fins, we generated artificially narrowed appendages in which the fin cleft depth and the positioning of rays bifurcations were perturbed compared with normal regenerates. To dissect the role of mechanotransduction in this process, we investigated the patterns of hydrodynamic forces acting on the surface of a zebrafish fin during regeneration by using particle tracking velocimetry on a range of biomimetic hydrofoils. This experimental approach enabled us to quantitatively compare hydrodynamic stress distributions over flapping fins of varying sizes and shapes. As a result, viscous shear stress acting on the distal margin of regenerating fins and the resulting internal tension are proposed as suitable signals for guiding the regulation of ray growth dynamics and branching pattern. Our findings suggest that mechanical forces are involved in the fine-tuning of the locomotory organ during fin morphogenesis.
Collapse
Affiliation(s)
- Paule Dagenais
- Physik-Institut, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Simon Blanchoud
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - David Pury
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - Catherine Pfefferli
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| | - Tinri Aegerter-Wilmsen
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Christof M Aegerter
- Physik-Institut, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.,Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Anna Jaźwińska
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland
| |
Collapse
|
9
|
Epidermal Club Cells in Fishes: A Case for Ecoimmunological Analysis. Int J Mol Sci 2021; 22:ijms22031440. [PMID: 33535506 PMCID: PMC7867084 DOI: 10.3390/ijms22031440] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 01/24/2021] [Accepted: 01/28/2021] [Indexed: 12/14/2022] Open
Abstract
Epidermal club cells (ECCs), along with mucus cells, are present in the skin of many fishes, particularly in the well-studied Ostariophysan family Cyprinidae. Most ECC-associated literature has focused on the potential role of ECCs as a component of chemical alarm cues released passively when a predator damages the skin of its prey, alerting nearby prey to the presence of an active predator. Because this warning system is maintained by receiver-side selection (senders are eaten), there is want of a mechanism to confer fitness benefits to the individual that invests in ECCs to explain their evolutionary origin and maintenance in this speciose group of fishes. In an attempt to understand the fitness benefits that accrue from investment in ECCs, we reviewed the phylogenetic distribution of ECCs and their histochemical properties. ECCs are found in various forms in all teleost superorders and in the chondrostei inferring either early or multiple independent origins over evolutionary time. We noted that ECCs respond to several environmental stressors/immunomodulators including parasites and pathogens, are suppressed by immunomodulators such as testosterone and cortisol, and their density covaries with food ration, demonstrating a dynamic metabolic cost to maintaining these cells. ECC density varies widely among and within fish populations, suggesting that ECCs may be a convenient tool with which to assay ecoimmunological tradeoffs between immune stress and foraging activity, reproductive state, and predator-prey interactions. Here, we review the case for ECC immune function, immune functions in fishes generally, and encourage future work describing the precise role of ECCs in the immune system and life history evolution in fishes.
Collapse
|
10
|
Dagenais P, Aegerter CM. Hydrodynamic stress maps on the surface of a flexible fin-like foil. PLoS One 2021; 16:e0244674. [PMID: 33434237 PMCID: PMC7802974 DOI: 10.1371/journal.pone.0244674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 12/14/2020] [Indexed: 11/18/2022] Open
Abstract
We determine the time dependence of pressure and shear stress distributions on the surface of a pitching and deforming hydrofoil from measurements of the three dimensional flow field. Period-averaged stress maps are obtained both in the presence and absence of steady flow around the foil. The velocity vector field is determined via volumetric three-component particle tracking velocimetry and subsequently inserted into the Navier-Stokes equation to calculate the total hydrodynamic stress tensor. In addition, we also present a careful error analysis of such measurements, showing that local evaluations of stress distributions are possible. The consistency of the force time-dependence is verified using a control volume analysis. The flapping foil used in the experiments is designed to allow comparison with a small trapezoidal fish fin, in terms of the scaling laws that govern the oscillatory flow regime. As a complementary approach, unsteady Euler-Bernoulli beam theory is employed to derive instantaneous transversal force distributions on the flexible hydrofoil from its deflection and the results are compared to the spatial distributions of hydrodynamic stresses obtained from the fluid velocity field.
Collapse
Affiliation(s)
- Paule Dagenais
- Physik-Institut, University of Zurich, Zurich, Switzerland
| | | |
Collapse
|
11
|
Zanandrea R, Bonan CD, Campos MM. Zebrafish as a model for inflammation and drug discovery. Drug Discov Today 2020; 25:2201-2211. [PMID: 33035664 DOI: 10.1016/j.drudis.2020.09.036] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 08/17/2020] [Accepted: 09/30/2020] [Indexed: 12/24/2022]
Abstract
Zebrafish is a small teleost (bony) fish used in many areas of pharmacology and toxicology. This animal model has advantages for the discovery of anti-inflammatory drugs, such as the potential for real-time assessment of cell migration mechanisms. Additionally, zebrafish display a repertoire of inflammatory cells, mediators, and receptors that are similar to those in mammals, including humans. Inflammatory disease modeling in either larvae or adult zebrafish represents a promising tool for the screening of new anti-inflammatory compounds, contributing to our understanding of the mechanisms involved in chronic inflammatory conditions. In this review, we provide an overview of the characterization of inflammatory responses in zebrafish, emphasizing its relevance for drug discovery in this research area.
Collapse
Affiliation(s)
- Rodrigo Zanandrea
- Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Medicina, Programa de Pós-Graduação em Medicina e Ciências da Saúde, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Laboratório de Neuroquímica e Psicofarmacologia, Porto Alegre, RS, Brazil
| | - Carla D Bonan
- Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Medicina, Programa de Pós-Graduação em Medicina e Ciências da Saúde, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Laboratório de Neuroquímica e Psicofarmacologia, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Programa de Pós-Graduação em Biologia Celular e Molecular, Porto Alegre, RS, Brazil
| | - Maria M Campos
- Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Medicina, Programa de Pós-Graduação em Medicina e Ciências da Saúde, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Programa de Pós-Graduação em Biologia Celular e Molecular, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Centro de Pesquisa em Toxicologia e Farmacologia, Porto Alegre, RS, Brazil.
| |
Collapse
|
12
|
Rangel-Huerta E, Guzman A, Maldonado E. The dynamics of epidermal stratification during post-larval development in zebrafish. Dev Dyn 2020; 250:175-190. [PMID: 32877571 DOI: 10.1002/dvdy.249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 08/08/2020] [Accepted: 08/22/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The epidermis, as a defensive barrier, is a consistent trait throughout animal evolution. During post-larval development, the zebrafish epidermis thickens by stratification or addition of new cell layers. Epidermal basal stem cells, expressing the transcription factor p63, are known to be involved in this process. Zebrafish post-larval epidermal stratification is a tractable system to study how stem cells participate in organ growth. METHODS We used immunohistochemistry, in combination with EdU cell proliferation detection, to study zebrafish epidermal stratification. For this procedure, we selected a window of post-larval stages (5-8 mm of standard length or SL, which normalizes age by size). Simultaneously, we used markers for asymmetric cell division and the Notch signaling pathway. RESULTS We found that epidermal stratification is the consequence of several events, including changes in cell shape, active cell proliferation and asymmetrical cell divisions. We identified a subset of highly proliferative epidermal cells with reduced levels of p63, which differed from the basal stem cells with high levels of p63. Additionally, we described different mechanisms that participate in the stratification process, including the phosphorylation of p63, asymmetric cell division regulated by the Par3 and LGN proteins, and expression of Notch genes.
Collapse
Affiliation(s)
- Emma Rangel-Huerta
- EvoDevo Research Group, Unidad de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México (UNAM), Puerto Morelos, Quintana Roo, Mexico.,Posgrado en Ciencias Biomédicas, Universidad Nacional Autónoma de México, UNAM, Puerto Morelos, Quintana Roo, Mexico
| | - Aida Guzman
- EvoDevo Research Group, Unidad de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México (UNAM), Puerto Morelos, Quintana Roo, Mexico.,Estudio Técnico Especializado en Histopatología, Escuela Nacional Preparatoria, ENP, Universidad Nacional Autónoma de México, UNAM, Ciudad de México, Mexico
| | - Ernesto Maldonado
- EvoDevo Research Group, Unidad de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México (UNAM), Puerto Morelos, Quintana Roo, Mexico
| |
Collapse
|
13
|
Suntres TE, Daghfous G, Ananvoranich S, Dubuc R, Zielinski BS. Sensory cutaneous papillae in the sea lamprey (
Petromyzon marinus
L.): II. Ontogeny and immunocytochemical characterization of solitary chemosensory cells. J Comp Neurol 2019; 528:865-878. [DOI: 10.1002/cne.24794] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 09/19/2019] [Accepted: 09/20/2019] [Indexed: 01/06/2023]
Affiliation(s)
- Tina E. Suntres
- Department of Biological Sciences University of Windsor Windsor Ontario Canada
| | - Gheylen Daghfous
- Groupe de Recherche sur le Système Nerveux Central, Département de Neurosciences Université de Montréal Montréal Quebec Canada
- Groupe de Recherche en Activité Physique Adaptée, Département des Sciences de l'activité Physique Université du Québec à Montréal Montréal Quebec Canada
| | - Sirinart Ananvoranich
- Department of Chemistry and Biochemistry University of Windsor Windsor Ontario Canada
| | - Réjean Dubuc
- Groupe de Recherche sur le Système Nerveux Central, Département de Neurosciences Université de Montréal Montréal Quebec Canada
- Groupe de Recherche en Activité Physique Adaptée, Département des Sciences de l'activité Physique Université du Québec à Montréal Montréal Quebec Canada
| | - Barbara S. Zielinski
- Department of Biological Sciences University of Windsor Windsor Ontario Canada
- Great Lakes Institute for Environmental Research University of Windsor Windsor Ontario Canada
| |
Collapse
|