1
|
Breves JP, Shaughnessy CA. Endocrine control of gill ionocyte function in euryhaline fishes. J Comp Physiol B 2024:10.1007/s00360-024-01555-3. [PMID: 38739280 DOI: 10.1007/s00360-024-01555-3] [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: 01/08/2024] [Revised: 02/16/2024] [Accepted: 04/11/2024] [Indexed: 05/14/2024]
Abstract
The endocrine system is an essential regulator of the osmoregulatory organs that enable euryhaline fishes to maintain hydromineral balance in a broad range of environmental salinities. Because branchial ionocytes are the primary site for the active exchange of Na+, Cl-, and Ca2+ with the external environment, their functional regulation is inextricably linked with adaptive responses to changes in salinity. Here, we review the molecular-level processes that connect osmoregulatory hormones with branchial ion transport. We focus on how factors such as prolactin, growth hormone, cortisol, and insulin-like growth-factors operate through their cognate receptors to direct the expression of specific ion transporters/channels, Na+/K+-ATPases, tight-junction proteins, and aquaporins in ion-absorptive (freshwater-type) and ion-secretory (seawater-type) ionocytes. While these connections have historically been deduced in teleost models, more recently, increased attention has been given to understanding the nature of these connections in basal lineages. We conclude our review by proposing areas for future investigation that aim to fill gaps in the collective understanding of how hormonal signaling underlies ionocyte-based processes.
Collapse
Affiliation(s)
- Jason P Breves
- Department of Biology, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA.
| | - Ciaran A Shaughnessy
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK, 74078, USA
| |
Collapse
|
2
|
Oto Y, Kuroki M, Iida M, Ito R, Nomura S, Watanabe K. A key evolutionary step determining osmoregulatory ability for freshwater colonisation in early life stages of fish. J Exp Biol 2023; 226:jeb246110. [PMID: 37767765 DOI: 10.1242/jeb.246110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 09/20/2023] [Indexed: 09/29/2023]
Abstract
Colonisation of freshwater habitats by marine animals is a remarkable evolutionary event that has enriched biodiversity in freshwater ecosystems. The acquisition of tolerance to hypotonic stress during early life stages is presumed to be essential for their successful freshwater colonisation, but very little empirical evidence has been obtained to support this idea. This study aimed to comprehend the evolutionary changes in osmoregulatory mechanisms that enhance larval freshwater tolerance in amphidromous fishes, which typically spend their larval period in marine (ancestral) habitats and the rest of their life history stages in freshwater (derived) habitats. We compared the life history patterns and changes in larval survivorship and gene expression depending on salinity among three congeneric marine-originated amphidromous goby species (Gymnogobius), which had been suggested to differ in their larval dependence on freshwater habitats. An otolith microchemical analysis and laboratory-rearing experiment confirmed the presence of freshwater residents only in G. urotaenia and higher larval survivorship of this species in the freshwater condition than in the obligate amphidromous G. petschiliensis and G. opperiens. Larval whole-body transcriptome analysis revealed that G. urotaenia from both amphidromous and freshwater-resident populations exhibited the greatest differences in expression levels of several osmoregulatory genes, including aqp3, which is critical for water discharge from their body during early fish development. The present results consistently support the importance of enhanced freshwater tolerance and osmoregulatory plasticity in larval fish to establish freshwater forms, and further identified key candidate genes for larval freshwater adaptation and colonisation in the goby group.
Collapse
Affiliation(s)
- Yumeki Oto
- Division of Biological Sciences, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto City, Kyoto Prefecture 606-8502, Japan
| | - Mari Kuroki
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo Metropolitan 113-8657, Japan
| | - Midori Iida
- Marine Biological Station, Sado Island Center for Ecological Sustainability, Niigata University, 87 Tassha, Sado City, Niigata Prefecture 952-2135, Japan
| | - Ryosuke Ito
- Division of Biological Sciences, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto City, Kyoto Prefecture 606-8502, Japan
| | - Shota Nomura
- Division of Biological Sciences, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto City, Kyoto Prefecture 606-8502, Japan
| | - Katsutoshi Watanabe
- Division of Biological Sciences, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto City, Kyoto Prefecture 606-8502, Japan
| |
Collapse
|
3
|
Lee CE, Charmantier G, Lorin-Nebel C. Mechanisms of Na + uptake from freshwater habitats in animals. Front Physiol 2022; 13:1006113. [PMID: 36388090 PMCID: PMC9644288 DOI: 10.3389/fphys.2022.1006113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/28/2022] [Indexed: 07/20/2023] Open
Abstract
Life in fresh water is osmotically and energetically challenging for living organisms, requiring increases in ion uptake from dilute environments. However, mechanisms of ion uptake from freshwater environments are still poorly understood and controversial, especially in arthropods, for which several hypothetical models have been proposed based on incomplete data. One compelling model involves the proton pump V-type H+ ATPase (VHA), which energizes the apical membrane, enabling the uptake of Na+ (and other cations) via an unknown Na+ transporter (referred to as the "Wieczorek Exchanger" in insects). What evidence exists for this model of ion uptake and what is this mystery exchanger or channel that cooperates with VHA? We present results from studies that explore this question in crustaceans, insects, and teleost fish. We argue that the Na+/H+ antiporter (NHA) is a likely candidate for the Wieczorek Exchanger in many crustaceans and insects; although, there is no evidence that this is the case for fish. NHA was discovered relatively recently in animals and its functions have not been well characterized. Teleost fish exhibit redundancy of Na+ uptake pathways at the gill level, performed by different ion transporter paralogs in diverse cell types, apparently enabling tolerance of low environmental salinity and various pH levels. We argue that much more research is needed on overall mechanisms of ion uptake from freshwater habitats, especially on NHA and other potential Wieczorek Exchangers. Such insights gained would contribute greatly to our general understanding of ionic regulation in diverse species across habitats.
Collapse
Affiliation(s)
- Carol Eunmi Lee
- Department of Integrative Biology, University of Wisconsin, Madison, WI, United States
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | - Guy Charmantier
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | | |
Collapse
|
4
|
Inokuchi M, Hiroi J, Kaneko T. Why can Mozambique Tilapia Acclimate to Both Freshwater and Seawater? Insights From the Plasticity of Ionocyte Functions in the Euryhaline Teleost. Front Physiol 2022; 13:914277. [PMID: 35711299 PMCID: PMC9194847 DOI: 10.3389/fphys.2022.914277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/17/2022] [Indexed: 11/27/2022] Open
Abstract
In teleost fishes, ionocytes in the gills are important osmoregulatory sites in maintaining ionic balance. During the embryonic stages before the formation of the gills, ionocytes are located in the yolk-sac membrane and body skin. In Mozambique tilapia embryos, quintuple-color immunofluorescence staining allowed us to classify ionocytes into four types: type I, showing only basolateral Na+/K+-ATPase (NKA) staining; type II, basolateral NKA and apical Na+, Cl− cotransporter 2; type III, basolateral NKA, basolateral Na+, K+, 2Cl− cotransporter 1a (NKCC1a) and apical Na+/H+ exchanger 3; and type IV, basolateral NKA, basolateral NKCC1a and apical cystic fibrosis transmembrane conductance regulator Cl− channel. The ionocyte population consisted mostly of type I, type II and type III in freshwater, while type I and IV dominated in seawater. In adult tilapia, dual observations of whole-mount immunocytochemistry and scanning electron microscopy showed morphofunctional alterations in ionocytes. After transfer from freshwater to seawater, while type-II ionocytes closed their apical openings to suspend ion absorption, type-III ionocytes with a concave surface were transformed into type IV with a pit via a transitory surface. The proposed model of functional classification of ionocytes can account not only for ion uptake in freshwater and ion secretion in seawater, but also for plasticity in ion-transporting functions of ionocytes in tilapia.
Collapse
Affiliation(s)
- Mayu Inokuchi
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Japan
| | - Junya Hiroi
- Department of Anatomy, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Toyoji Kaneko
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Japan
| |
Collapse
|
5
|
Postlethwait JH, Massaquoi MS, Farnsworth DR, Yan YL, Guillemin K, Miller AC. The SARS-CoV-2 receptor and other key components of the Renin-Angiotensin-Aldosterone System related to COVID-19 are expressed in enterocytes in larval zebrafish. Biol Open 2021; 10:bio058172. [PMID: 33757938 PMCID: PMC8015242 DOI: 10.1242/bio.058172] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 01/08/2023] Open
Abstract
People with underlying conditions, including hypertension, obesity, and diabetes, are especially susceptible to negative outcomes after infection with coronavirus SARS-CoV-2, which causes COVID-19. Hypertension and respiratory inflammation are exacerbated by the Renin-Angiotensin-Aldosterone System (RAAS), which normally protects from rapidly dropping blood pressure via Angiotensin II (Ang II) produced by the enzyme Ace. The Ace paralog Ace2 degrades Ang II, counteracting its chronic effects, and serves as the SARS-CoV-2 receptor. Ace, the coronavirus, and COVID-19 comorbidities all regulate Ace2, but we do not yet understand how. To exploit zebrafish (Danio rerio) to help understand the relationship of the RAAS to COVID-19, we must identify zebrafish orthologs and co-orthologs of human RAAS genes and understand their expression patterns. To achieve these goals, we conducted genomic and phylogenetic analyses and investigated single cell transcriptomes. Results showed that most human RAAS genes have one or more zebrafish orthologs or co-orthologs. Results identified a specific type of enterocyte as the specific site of expression of zebrafish orthologs of key RAAS components, including Ace, Ace2, Slc6a19 (SARS-CoV-2 co-receptor), and the Angiotensin-related peptide cleaving enzymes Anpep (receptor for the common cold coronavirus HCoV-229E), and Dpp4 (receptor for the Middle East Respiratory Syndrome virus, MERS-CoV). Results identified specific vascular cell subtypes expressing Ang II receptors, apelin, and apelin receptor genes. These results identify genes and cell types to exploit zebrafish as a disease model for understanding mechanisms of COVID-19.
Collapse
Affiliation(s)
| | | | | | - Yi-Lin Yan
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Karen Guillemin
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA
| | - Adam C Miller
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| |
Collapse
|
6
|
Sachi ITDC, Bonomo MM, Sakuragui MM, Modena PZ, Paulino MG, Carlos RM, Fernandes JB, Fernandes MN. Biochemical and morphological biomarker responses in the gills of a Neotropical fish exposed to a new flavonoid metal-insecticide. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111459. [PMID: 33069948 DOI: 10.1016/j.ecoenv.2020.111459] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 06/11/2023]
Abstract
The flavonoid metal-insecticide [Mg(hesp)2(phen)], denominated MgHP, has high potential for controlling agricultural pests. If applied in large scale, it may reach aquatic ecosystems and be harmful to the biota. This study evaluated the effects of MgHP in the gills of the Neotropical fish, Prochilodus lineatus by determining the activity of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione s-transferase (GST), and the levels of glutathione (GSH) and lipid peroxidation (LPO) after 24 and 96 h exposure to 0, 1, 10, 100 and 1000 μg L-1. The histopathological changes with emphases to mitochondria-rich cells (MRC) were evaluated as well. After 24 h exposure the enzyme activities and the GSH and LPO levels were unchanged however, after 96 h exposure to high MgHP concentration (1000 μg L-1), the GST activity and GSH levels increased. Oxidative stress measured as LPO levels did not occur after MgHP exposure in both periods. Gill tissue alterations increased after MgHP exposure to 10, 100 and 1000 μg L-1. Cellular atrophy, pillar cells changes, filament epithelium hyperplasia and hypertrophy, lamellar epithelium hyperplasia were the most frequent histopathology. MRC in the filament epithelium decreased after exposure to 24 h and increased after 96 h indicating possible transitory osmo-ionic disruption. P. lineatus exhibited high tolerance to MgHP. The increased GST activity and GSH levels after 96 h exposure suggested possible MgHP accumulation and concentration- and time-dependent response. Histopathology in the gills of exposed fish occurred at high MgHP concentrations. These results suggested that the MgHP into water, at high concentrations, affect the gills by changing GST activity, GSH levels and histology being useful biomarkers for MgHP water contamination.
Collapse
Affiliation(s)
- Ivelise Teresa de Castro Sachi
- Postgraduate Program in Ecology and Natural Resources, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13563-905 São Carlos, SP, Brazil; Department of Physiological Sciences, Federal University of São Carlos, Rodovia Washington, Luiz Km 235, 13563-905 São Carlos, SP, Brazil
| | - Marina Marques Bonomo
- Postgraduate Program in Ecology and Natural Resources, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13563-905 São Carlos, SP, Brazil; Department of Physiological Sciences, Federal University of São Carlos, Rodovia Washington, Luiz Km 235, 13563-905 São Carlos, SP, Brazil
| | - Marise Margareth Sakuragui
- Postgraduate Program in Ecology and Natural Resources, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13563-905 São Carlos, SP, Brazil; Department of Physiological Sciences, Federal University of São Carlos, Rodovia Washington, Luiz Km 235, 13563-905 São Carlos, SP, Brazil
| | - Pamela Zaganin Modena
- Department of Physiological Sciences, Federal University of São Carlos, Rodovia Washington, Luiz Km 235, 13563-905 São Carlos, SP, Brazil
| | - Marcelo Gustavo Paulino
- Federal University of Tocantins, Campus Araguaína, Avenida Paraguai, s/n°, Setor Cimba, 77824-838 Araguaína, TO, Brazil
| | - Rose Maria Carlos
- Chemistry Department, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13565-905 São Carlos, SP, Brazil
| | - João Batista Fernandes
- Chemistry Department, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13565-905 São Carlos, SP, Brazil
| | - Marisa Narciso Fernandes
- Postgraduate Program in Ecology and Natural Resources, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, 13563-905 São Carlos, SP, Brazil; Department of Physiological Sciences, Federal University of São Carlos, Rodovia Washington, Luiz Km 235, 13563-905 São Carlos, SP, Brazil.
| |
Collapse
|
7
|
Shaughnessy CA, Breves JP. Molecular mechanisms of Cl
−
transport in fishes: New insights and their evolutionary context. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2020; 335:207-216. [DOI: 10.1002/jez.2428] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/13/2022]
Affiliation(s)
| | - Jason P. Breves
- Department of Biology Skidmore College Saratoga Springs New York USA
| |
Collapse
|
8
|
Nakamura M, Jiang T, Xu G, Yang J, Xu P, Watanabe S, Kaneko T, Koyama T, Kikuchi K, Tsukamoto K, Otake T. Capacity for freshwater acclimation and differences in the transcription of ion transporter genes underlying different migratory life histories of Takifugu fish. Gene 2020; 767:145285. [PMID: 33144271 DOI: 10.1016/j.gene.2020.145285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/16/2020] [Accepted: 10/27/2020] [Indexed: 10/23/2022]
Abstract
The genus Takifugu is a group of approximately 20 species of puffer fishes living in a wide range of salinity environments around East Asian countries. This group presents a broad spectrum of evolutionary stages adapted to anadromy as a result of speciation that occurred a short time (2-5 million years) ago on an evolutionary timescale. This group thus can be considered as a model for studying the evolutionary mechanisms of anadromy. We firstly conducted a transfer experiment from seawater to low-salinity waters on five Takifugu species: two anadromous species T. obscurus and T. ocellatus, two euryhaline wanderer marine species T. rubripes and T. niphobles, and a strictly marine species T. snyderi, and confirmed that the capacity for acclimation to hypotonic environments was associated with their life history strategies. Next, transcriptomes of the gill and intestine of these species in hypotonic condition were compared to those under hypertonic condition for each species using RNA-Sequencing so as to determine possible candidate transporters playing an important role on freshwater adaptation. As this analysis suggested that cftr, encoding an important ion transporter for seawater acclimation in the gill, and ncc, encoding a transporter that is suggested to play important osmoregulatory roles in the intestine, are important candidates, their expression was validated by quantitative real-time PCR analysis. Expression of cftr was downregulated in the gills of the four euryhaline species under the hypotonic condition, but no change was detected in the gill of stenohaline T. snyderi, which may be one reason for the poor hypotonic acclimation capacity of T. snyderi. Expression of ncc was clearly upregulated in the intestines of the two anadromous species under the hypotonic condition, but not in other three species. Different ion transporter expression patterns between the five species indicate that the transcriptional regulation of cftr in the gill and ncc in the intestine may be important for the improvement of hypotonic acclimation capacity and evolution of anadromy in the Takifugu species.
Collapse
Affiliation(s)
- Masahiro Nakamura
- Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Tokyo 113-8657, Japan.
| | - Tao Jiang
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi City, Jiangsu Province 214081, China.
| | - Gangchun Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi City, Jiangsu Province 214081, China.
| | - Jian Yang
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi City, Jiangsu Province 214081, China.
| | - Pao Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi City, Jiangsu Province 214081, China.
| | - Soichi Watanabe
- Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Tokyo 113-8657, Japan.
| | - Toyoji Kaneko
- Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Tokyo 113-8657, Japan.
| | - Takashi Koyama
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki City, Nagasaki 852-8521, Japan; Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Hamamatsu, Shizuoka 431-0214, Japan.
| | - Kiyoshi Kikuchi
- Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Hamamatsu, Shizuoka 431-0214, Japan.
| | - Katsumi Tsukamoto
- College of Bioresource Sciences, Nihon University, Kameino, Kanagawa 252-0880, Japan.
| | - Tsuguo Otake
- Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo, Tokyo 113-8657, Japan.
| |
Collapse
|
9
|
Postlethwait JH, Farnsworth DR, Miller AC. An intestinal cell type in zebrafish is the nexus for the SARS-CoV-2 receptor and the Renin-Angiotensin-Aldosterone System that contributes to COVID-19 comorbidities. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020. [PMID: 32908984 DOI: 10.1101/2020.09.01.278366] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
People with underlying conditions, including hypertension, obesity, and diabetes, are especially susceptible to negative outcomes after infection with the coronavirus SARS-CoV-2. These COVID-19 comorbidities are exacerbated by the Renin-Angiotensin-Aldosterone System (RAAS), which normally protects from rapidly dropping blood pressure or dehydration via the peptide Angiotensin II (Ang II) produced by the enzyme Ace. The Ace paralog Ace2 degrades Ang II, thus counteracting its chronic effects. Ace2 is also the SARS-CoV-2 receptor. Ace , the coronavirus, and COVID-19 comorbidities all regulate Ace2 , but we don't yet understand how. To exploit zebrafish ( Danio rerio ) as a disease model to understand mechanisms regulating the RAAS and its relationship to COVID-19 comorbidities, we must first identify zebrafish orthologs and co-orthologs of human RAAS genes, and second, understand where and when these genes are expressed in specific cells in zebrafish development. To achieve these goals, we conducted genomic analyses and investigated single cell transcriptomes. Results showed that most human RAAS genes have an ortholog in zebrafish and some have two or more co-orthologs. Results further identified a specific intestinal cell type in zebrafish larvae as the site of expression for key RAAS components, including Ace, Ace2, the coronavirus co-receptor Slc6a19, and the Angiotensin-related peptide cleaving enzymes Anpep and Enpep. Results also identified specific vascular cell subtypes as expressing Ang II receptors, apelin , and apelin receptor genes. These results identify specific genes and cell types to exploit zebrafish as a disease model for understanding the mechanisms leading to COVID-19 comorbidities. SUMMARY STATEMENT Genomic analyses identify zebrafish orthologs of the Renin-Angiotensin-Aldosterone System that contribute to COVID-19 comorbidities and single-cell transcriptomics show that they act in a specialized intestinal cell type.
Collapse
|
10
|
Malakpour Kolbadinezhad S, Coimbra J, Wilson JM. Is the dendritic organ of the striped eel catfish Plotosus lineatus an ammonia excretory organ? Comp Biochem Physiol A Mol Integr Physiol 2019; 241:110640. [PMID: 31870932 DOI: 10.1016/j.cbpa.2019.110640] [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: 09/09/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 11/24/2022]
Abstract
The dendritic organ (DO) is a salt secretory organ in the Plotosidae marine catfishes. The potential role of the DO in ammonia excretion was investigated by examining the effects of salinity [brackishwater (BW 3‰), seawater (SW 34‰) and hypersaline water (HSW 60‰)] acclimation and DO ligation on ammonia excretion and ammonia transporter expression by immunohistochemistry (IHC), immunoblotting (IB) and qPCR. Ammonia flux rates (JAmm) were significantly lower in BW compared to SW and HSW. DO ligation resulted in a significantly lower JAmm in SW but not BW fish. IHC demonstrated apical and basolateral localization of Rhesus-associated glycoprotein (Rhag-like) and Rhbg-like proteins, respectively, in parenchymal cells of the DO acini. In the gills, which are the primary site of ammonia excretion in teleost fishes, IHC showed an apical localization of Rhag-like protein in some Na+/K+-ATPase (NKA) immunoreactive (IR) cells limited to a few interlamellar regions of the filament and, in both apical and basolateral membranes of pillar cells irrespective of treatment group. In gills, the distribution of NKA-IR cells showed no salinity and/or ligation dependency. IB of Rhag and Rhbg-like proteins was found only in the gills and expression levels did not change with salinity but ligation in BW decreased Rhbg-like levels. Although Rhcg was not detected with heterologous antibodies, rhcg1 mRNA expression was detected in both gills and DO. HSW was associated with the lowest expression in DO and ligations in SW and BW were without effect on branchial expression levels. Taken together these results indicate the DO potentially has a physiological role in ammonia excretion under SW conditions.
Collapse
Affiliation(s)
- Salman Malakpour Kolbadinezhad
- Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Porto, Portugal; Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal; Coldwater Fisheries Research Center (CFRC), Iranian Fisheries Sciences Research Institute (IFSRI), Agricultural Research, Education and Extension Organization, Tonekabon, Iran.
| | - João Coimbra
- Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Porto, Portugal; Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal.
| | - Jonathan M Wilson
- Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto, Porto, Portugal; Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal; Department of Biology, Wilfrid Laurier University, Waterloo, Canada.
| |
Collapse
|
11
|
Effect of salinity and temperature on the expression of genes involved in branchial ion transport processes in European sea bass. J Therm Biol 2019; 85:102422. [DOI: 10.1016/j.jtherbio.2019.102422] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 09/05/2019] [Accepted: 09/17/2019] [Indexed: 12/24/2022]
|
12
|
Wong MKS, Nobata S, Hyodo S. Enhanced osmoregulatory ability marks the smoltification period in developing chum salmon (Oncorhynchus keta). Comp Biochem Physiol A Mol Integr Physiol 2019; 238:110565. [PMID: 31493553 DOI: 10.1016/j.cbpa.2019.110565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/29/2019] [Accepted: 08/30/2019] [Indexed: 11/29/2022]
Abstract
The freshwater (FW) life of chum salmon is short, as they migrate to the ocean soon after emergence from the substrate gravel of natal waters. The alevins achieve seawater (SW) acclimating ability at an early developmental stage and the details of smoltification are not clear. We examined the stage-dependent SW acclimating ability in chum salmon alevins and found a sharp increase in SW tolerance during development that resembles the physiological parr-smolt transformation seen in other salmonids. Perturbation of plasma Na+ after SW exposure was prominent from the hatched embryo stage to emerged alevins, but the plasma Na+ became highly stable and more resistant to perturbation soon after complete absorption of yolk. Marker gene expression for SW-ionocytes including Na/K-ATPase (NKA α1b), Na-K-Cl cotransporter 1a (NKCC1a), Na/H exchanger 3a (NHE3a), cystic fibrosis transmembrane conductance regulators (CFTR I and CFTR II) were all upregulated profoundly at the same stage when the alevins were challenged by SW, suggesting that the stability of plasma Na+ concentration was partly a result of elevated osmoregulatory capability. FW-ionocyte markers including NKA α1a and NHE3b were consistently downregulated independent of stage by SW exposure, suggesting that embryos at all stages respond to salinity challenge, but the increase in SW osmoregulatory capability is restricted to the developmental stage after emergence. We propose that the "smoltification period" is condensed and integrated into the early development of chum salmon, and our results can be extrapolated to the future studies on hormonal controls and developmental triggers for smoltification in salmonids.
Collapse
Affiliation(s)
- Marty Kwok-Shing Wong
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan.
| | - Shigenori Nobata
- International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo, Otsuchi, Iwate, Japan
| | - Susumu Hyodo
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan
| |
Collapse
|
13
|
Ion uptake pathways in European sea bass Dicentrarchus labrax. Gene 2019; 692:126-137. [DOI: 10.1016/j.gene.2019.01.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/12/2018] [Accepted: 01/02/2019] [Indexed: 01/20/2023]
|
14
|
Liu Y, Wen H, Qi X, Zhang X, Zhang K, Fan H, Tian Y, Hu Y, Li Y. Genome-wide identification of the Na+/H+ exchanger gene family in Lateolabrax maculatus and its involvement in salinity regulation. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2019; 29:286-298. [DOI: 10.1016/j.cbd.2019.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/03/2019] [Accepted: 01/04/2019] [Indexed: 01/21/2023]
|
15
|
Martin KE, Ehrman JM, Wilson JM, Wright PA, Currie S. Skin ionocyte remodeling in the amphibious mangrove rivulus fish (Kryptolebias marmoratus
). JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2018; 331:128-138. [DOI: 10.1002/jez.2247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Keri E. Martin
- Department of Biology, Mount Allison University; Sackville New Brunswick Canada
| | - James M. Ehrman
- Department of Biology, Mount Allison University; Sackville New Brunswick Canada
| | - Jonathan M. Wilson
- Department of Biology, Wilfrid Laurier University; Waterloo Ontario Canada
| | - Patricia A. Wright
- Department of Integrative Biology, University of Guelph; Guelph Ontario Canada
| | - Suzanne Currie
- Department of Biology, Mount Allison University; Sackville New Brunswick Canada
| |
Collapse
|
16
|
Malakpour Kolbadinezhad S, Coimbra J, Wilson JM. Effect of dendritic organ ligation on striped eel catfish Plotosus lineatus osmoregulation. PLoS One 2018; 13:e0206206. [PMID: 30352080 PMCID: PMC6198982 DOI: 10.1371/journal.pone.0206206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 10/09/2018] [Indexed: 02/06/2023] Open
Abstract
Unique amongst the teleost, Plotosidae catfish possess a dendritic organ (DO) as a purported salt secreting organ, whereas other marine teleosts rely on their gill ionocytes for active NaCl excretion. To address the role of the DO in ionregulation, ligation experiments were conducted in brackish water (BW) 3‰ and seawater (SW) 34‰ acclimated Plotosus lineatus and compared to sham operated fish. Ligation in SW resulted in an osmoregulatory impairment in blood (elevated ions and hematocrit) and muscle (dehydration). However, SW ligation did not elicit compensatory changes in gill or kidney Na+/K+-ATPase (NKA) activity and/or protein expression while a decrease in anterior intestine and increased in posterior intestine were observed but this was not reflected at the protein level. Following ligation in SW, protein levels of carbonic anhydrase (CA) and V-ATPase B subunit (VHAB) were higher in kidney but either lower (CA) or unchanged (VHAB) in other tissues. Taken together, the osmotic disturbance in ligated SW fish indicates the central role of the DO in salt secretion and the absence of a compensatory response from the gill.
Collapse
Affiliation(s)
- Salman Malakpour Kolbadinezhad
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - João Coimbra
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Jonathan M. Wilson
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Matosinhos, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
- Department of Biology, Wilfrid Laurier University, Waterloo, Canada
- * E-mail:
| |
Collapse
|