1
|
Cunha M, Nardi A, Henriques B, Soares AMVM, Pereira E, Regoli F, Freitas R. The role of the macroalgae Ulva lactuca on the cellular effects of neodymium and mercury in the mussel Mytilus galloprovincialis. CHEMOSPHERE 2024; 358:141908. [PMID: 38615948 DOI: 10.1016/j.chemosphere.2024.141908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 03/02/2024] [Accepted: 04/03/2024] [Indexed: 04/16/2024]
Abstract
Rare earth elements (REEs) are increasingly being studied mainly due to their economic importance and wide range of applications, but also for their rising environmental concentrations and potential environmental and ecotoxicological impacts. Among REEs, neodymium (Nd) is widely used in lasers, glass additives, and magnets. Currently, NdFeB-based permanent magnets are the most significant components of electronic devices and Nd is used because of its magnetic properties. In addition to REEs, part of the environmental pollution related to electrical and electronic equipment, fluorescent lamps and batteries also comes from mercury (Hg). Since both elements persist in ecosystems and are continuously accumulated by marine organisms, a promising approach for water decontamination has emerged. Through a process known as sorption, live marine macroalgae can be used, especially Ulva lactuca, to accumulate potential toxic elements from the water. Therefore, the present study aimed to evaluate the cellular toxicity of Nd and Hg in Mytilus galloprovincialis, comparing the biochemical effects induced by these elements in the presence or absence of the macroalgae U. lactuca. The results confirmed that Hg was more toxic to mussels than Nd, but also showed the good capability of U. lactuca in preventing the onset of cellular disturbance and homeostasis disruption in M. galloprovincialis by reducing bioavailable Hg levels. Overall, the biochemical parameters evaluated related to metabolism, antioxidant and biotransformation defences, redox balance, and cellular damage, showed that algae could prevent biological effects in mussels exposed to Hg compared to those exposed to Nd. This study contributes to the advancement of knowledge in this field, namely the understanding of the impacts of different elements on bivalves and the crucial role of algae in the protection of other aquatic organisms.
Collapse
Affiliation(s)
- Marta Cunha
- Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Alessandro Nardi
- Dipartimento di Scienze Della Vita e Dell'Ambiente, Università Politecnica Delle Marche, Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90131, Italy
| | - Bruno Henriques
- Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal; LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Eduarda Pereira
- Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal; LAQV-REQUIMTE - Associated Laboratory for Green Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Francesco Regoli
- Dipartimento di Scienze Della Vita e Dell'Ambiente, Università Politecnica Delle Marche, Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90131, Italy
| | - Rosa Freitas
- Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal.
| |
Collapse
|
2
|
Nunes B, Pinheiro D, Gomes A. Effect of sublethal concentrations of the antiparasitic ivermectin on the polychaeta species Hediste diversicolor: biochemical and behavioral responses. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:1841-1853. [PMID: 34224071 DOI: 10.1007/s10646-021-02444-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
Pharmaceutical drugs have emerged as major micropollutants in aquatic ecosystems. Their presence has been systematically reported in monitoring surveys, and their wide distribution and constant presence in the wild is a direct consequence of their massive use, in both human and veterinary therapeutics. Drugs used to treat parasitic infections in livestock are major contaminants, given the amounts in which they are administered, and reach the aquatic compartment in high amounts, where they may affect non target species. Some of these drugs are prone to find their final deposit in sediments of estuarine areas, exerting their toxic effects preferentially at these locations. Sediment dwelling organisms of coastal areas, such as polychaetas, are especially prone to have their major physiological functions compromised after being exposed to pharmaceutical drugs. Ivermectin is one of the most used antiparasitic drugs, and its effects are not limited to biochemical traits, but also behavioral features may be compromised considering their neurotoxic actions. Despite these putative effects, little is known about their toxicity on polychaetas. The present study aimed to characterize the toxicity of realistic levels of ivermectin on the polychaeta Hediste diversicolor, in biochemical and behavioral terms. The obtained results showed that low levels of ivermectin are capable of causing significant disturbances in mobility and burrowing activity of exposed worms, as well as alterations of metabolic and anti-oxidant defense efficacy of exposed animals, suggesting that its environmental presence may mean a major environmental concern.
Collapse
Affiliation(s)
- B Nunes
- Departamento de Biologia da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193, Aveiro, Portugal.
| | - D Pinheiro
- Departamento de Física da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - A Gomes
- Departamento de Biologia da Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| |
Collapse
|
3
|
Histochemical detection of free thiols in glandular cells and tissues of different marine Polychaeta. Histochem Cell Biol 2020; 154:315-325. [PMID: 32507976 DOI: 10.1007/s00418-020-01889-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2020] [Indexed: 12/15/2022]
Abstract
Either through differentiated glands or specialised individual cells, the coating epithelia of soft-bodied marine invertebrates are responsible for the secretion of a broad span of peptidic substances, from protective mucins to biocides. These secretions are characterised by the presence of cysteine-rich proteins and peptides, rendering a distinct histochemical signature of secretory epithelia. Through a histochemical procedure for fluorescence microscopy in paraffin sections, we performed a comparative assessment of the distribution of thiol-rich compounds in multiple epithelia of different species of intertidal Polychaeta, which revealed distinctive patterns of distribution that closely relate to ecology, morphoanatomy and physiology. The presence of free thiols was notorious in mucocytes and enzyme-plus toxin-secreting cells. Consequently, strong signals were recorded in the mucocytes of the parapodia of Nereis splendida, the epidermis and pharynx epithelium of Mysta picta and the venom glands of Glycera alba. The findings show an investment in mucus secretion in foragers such as Nereis and Mysta, especially the latter, which is not a native burrower, as a protective response and as lubricant for locomotion. Additionally, nereidids are believed to secret integumentary toxins for defence. On the other hand, Glycera is an ambush predatorial burrower whose behaviour entirely revolves around the delivery of venom making use of its four jaws. The results showed that the detection of thiol-rich compounds in histological sections can be a tool to identify potential toxin secretion and delivery structures, with important consequences for the bioprospecting of novel bioreactives from marine invertebrates for the purpose of drug discovery.
Collapse
|
4
|
Gutiérrez JS, Sabat P, Castañeda LE, Contreras C, Navarrete L, Peña-Villalobos I, Navedo JG. Oxidative status and metabolic profile in a long-lived bird preparing for extreme endurance migration. Sci Rep 2019; 9:17616. [PMID: 31772390 PMCID: PMC6879648 DOI: 10.1038/s41598-019-54057-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 11/08/2019] [Indexed: 12/11/2022] Open
Abstract
The high metabolic activity associated with endurance flights and intense fuelling of migrant birds may produce large quantities of reactive oxygen species, which cause oxidative damage. Yet it remains unknown how long-lived birds prepare for oxidative challenges prior to extreme flights. We combined blood measurements of oxidative status and enzyme and fat metabolism in Hudsonian godwits (Limosa haemastica, a long-lived shorebird) before they embarked on non-stop flights longer than 10,000 km during their northbound migrations. We found that godwits increased total antioxidant capacity (TAC) and reduced oxidative damage (TBARS) as the pre-migratory season progressed, despite higher basal metabolic rates before departure. Elevations in plasma β-hydroxybutyrate and uric acid suggest that lipid and protein breakdown supports energetic requirements prior to migration. Significant associations between blood mitochondrial cytochrome-c oxidase and plasma TAC (negative) and TBARS (positive) during winter indicate that greater enzyme activity can result in greater oxidative damage and antioxidant responses. However enzyme activity remained unchanged between winter and premigratory stages, so birds may be unable to adjust metabolic enzyme activity in anticipation of future demands. These results indicate that godwits enhance their oxidative status during migratory preparation, which might represent an adaptation to diminish the physiological costs of long-distance migration.
Collapse
Affiliation(s)
- Jorge S Gutiérrez
- Estación Experimental Quempillén, Facultad de Ciencias, Universidad Austral de Chile, Ancud, Chiloé, Chile.
- Conservation Biology Research Group, Department of Anatomy, Cell Biology and Zoology, Faculty of Sciences, University of Extremadura, Badajoz, Spain.
| | - Pablo Sabat
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
- Center of Applied Ecology and Sustainability, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Luis E Castañeda
- Programa de Genética Humana, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
| | - Carolina Contreras
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Lucas Navarrete
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Isaac Peña-Villalobos
- Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Juan G Navedo
- Estación Experimental Quempillén, Facultad de Ciencias, Universidad Austral de Chile, Ancud, Chiloé, Chile
- Bird Ecology Lab, Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| |
Collapse
|
5
|
Stabili L, Licciano M, Giangrande A, Gerardi C, De Pascali SA, Fanizzi FP. First Insight on the Mucus of the Annelid Myxicola infundibulum (Polychaeta, Sabellidae) as a Potential Prospect for Drug Discovery. Mar Drugs 2019; 17:md17070396. [PMID: 31284386 PMCID: PMC6669576 DOI: 10.3390/md17070396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/20/2019] [Accepted: 07/02/2019] [Indexed: 11/21/2022] Open
Abstract
Many marine organisms, including invertebrates, produce mucosal matrices having different functions. Besides mechanical protection, the mucus of many invertebrates contains specific compounds to make the animal poisonous and/or distasteful or irritating. The presence of antibiotic molecules is more advantageous for some invertebrates to contrast bacterial attack. In the present study we investigated the mucus of the Mediterranean annelid species Myxicola infundibulum living in a gelatinous envelope made up of dense mucus. Antimicrobial lysozyme-like and antioxidant activities were investigated to highlight the potential interest of the worm mucus as a source of bioactive compounds for biotechnological applications. In order to understand which kind of compounds could be responsible for the detected activities, the mucus of M. infundibulum was chemically characterized in terms of elemental composition, protein, lipid and carbohydrate content. Further chemical characterization was achieved by the advanced analytical technique of multinuclear and multidimensional NMR spectroscopy. NMR spectroscopy revealed the scarcity of lipids which preferentially resulted of alcoholic origin, or otherwise hydroxylate and several aminoacids (valine, leucine and alanine) in the aqueous extract in relation to the protein nature of M. infundibulum mucus. The mucus indeed is mainly composed by water (94% ± 0.7%) whereas its dry weight is made of proteins (36% ± 2.3%) followed by lipids (2.9% ± 0.07%) and carbohydrates (2% ± 0.31%). The mucus exerted a natural antibacterial lysozyme-like activity corresponding to 1.14 mg mL−1 of hen egg-white lysozyme and an antioxidant activity corresponding to 483.00 ± 79.22 nmolTE (Trolox equivalent)/mL sample as Trolox Equivalent Antioxidant Capacity (TEAC) and 276.26 ± 50.76 nmolTE/mL sample as Oxygen Radical Absorbance Capacity (ORAC). Therefore, our findings have potential implications due to the ongoing explosion of antibiotic resistant infections and the need to discover antibacterial agents. Additionally, the observed antioxidant activity is intriguing taking into account the need to find natural antioxidants useful for human health.
Collapse
Affiliation(s)
- Loredana Stabili
- Istituto di Ricerca sulle Acque, Sede Secondaria Talassografico di Taranto, CNR, Via Roma 3, 74123 Taranto, Italy.
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Prov.le Lecce Monteroni, 73100 Lecce, Italy.
| | - Margherita Licciano
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Prov.le Lecce Monteroni, 73100 Lecce, Italy
| | - Adriana Giangrande
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Prov.le Lecce Monteroni, 73100 Lecce, Italy
| | - Carmela Gerardi
- Istituto di Scienze delle Produzioni Alimentari, U.O.S. di Lecce, via Prov.le Lecce-Monteroni, 73100 Lecce, Italy
| | - Sandra Angelica De Pascali
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Prov.le Lecce Monteroni, 73100 Lecce, Italy
| | - Francesco Paolo Fanizzi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Via Prov.le Lecce Monteroni, 73100 Lecce, Italy
| |
Collapse
|
6
|
Nunes B. Acute ecotoxicological effects of salicylic acid on the Polychaeta species Hediste diversicolor: evidences of low to moderate pro-oxidative effects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:7873-7882. [PMID: 30684172 DOI: 10.1007/s11356-018-04085-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/27/2018] [Indexed: 06/09/2023]
Abstract
Contamination of the aquatic environment by pharmaceutical drugs is an emerging issue in ecotoxicology. Aquatic organisms, in the presence of xenobiotics, tend to activate defensive mechanisms against toxic effects in order to mitigate and/or compensate for the toxic damages that frequently result from these interactions. Salicylic acid (SA) is a common drug, widely used in human medicine due to its analgesic, anti-inflammatory, and antipyretic properties, as well as its activity in terms of preventing platelet aggregation, among other clinical and cosmetic uses. It is commonly found in levels of the nanograms per liter to the micrograms per liter range in receiving waters, and its presence has been related to toxic effects in aquatic organisms, including oxidative stress. However, the number of studies that characterize the ecotoxicological profile of salicylates is still scarce and no studies have been published about the putative toxic effects of SA, especially in marine polychaetes. In order to determine the potential ecotoxicological effects caused by SA, individuals of the marine Polychaeta species Hediste diversicolor were exposed for 96 h to ecologically relevant concentrations of this compound, and several biochemical endpoints were evaluated, namely the activity of the antioxidant enzymes glutathione peroxidase (GPx) and catalase (CAT), the phase II biotransformation isoenzymes glutathione S-transferases (GSTs), the cholinergic enzyme acetylcholinesterase (AChE), and the determination of lipoperoxidative damage (thiobarbituric acid-reactive substances (TBARS) assay). The obtained results demonstrated that despite the pro-oxidative effects elicited by SA, exposure to realistic levels of this compound was not able to generate a state of oxidative stress, and the adaptive protective responses elicited by exposed individuals were effective enough to minimize and/or inhibit the damage potentially caused by overproduced reactive oxygen species.
Collapse
Affiliation(s)
- Bruno Nunes
- Departamento de Biologia, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
- Centro de Estudos do Ambiente e do Mar, CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| |
Collapse
|
7
|
Sardi AE, Renaud PE, da Cunha Lana P, Camus L. Baseline levels of oxidative stress biomarkers in species from a subtropical estuarine system (Paranaguá Bay, southern Brazil). MARINE POLLUTION BULLETIN 2016; 113:496-508. [PMID: 27519757 DOI: 10.1016/j.marpolbul.2016.08.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/02/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
Offshore petroleum exploration has increased the risks of oil spills in coastal tropical and subtropical habitats. Monitoring tools are needed to assess and protect environmental health. We determined baseline values of antioxidant biomarkers (CAT, SOD, GPx, GST, MDA) for five ecologically relevant species in a subtropical system in southern Brazil. Regional baseline levels are compared with literature data as a basis to eventually test their efficacy as post-spill monitoring tools. Differences in the antioxidant response among species, contamination, and seasons were tested using univariate and multivariate analyses. The bivalves Anomalocardia flexuosa and Crassostrea rhizophorae and the catfish Genidens genidens emerge as suitable sentinel species. Seasonality is the main factor accounting for biomarkers variability, and not background contamination level. However, interactions between season and contamination level are also significant, indicating that biomarkers respond to complex environmental settings, a fact that needs to be fully understood for designing proper monitoring programs.
Collapse
Affiliation(s)
- Adriana E Sardi
- Fram Centre, Akvaplan-niva, 9296 Tromsø, Norway; University of Tromsø, Faculty of Science, Faculty of Science and Technology, Department of Science & Safety, N-9037 Tromsø, Norway.
| | | | - Paulo da Cunha Lana
- Centro de Estudos do Mar, Universidade Federal do Paraná (UFPR), PO Box 61, 83255-000, Pontal do Paraná, Paraná, Brazil
| | - Lionel Camus
- Fram Centre, Akvaplan-niva, 9296 Tromsø, Norway; University of Tromsø, Faculty of Science, Faculty of Science and Technology, Department of Science & Safety, N-9037 Tromsø, Norway
| |
Collapse
|
8
|
Rawat R, Deheyn DD. Evidence that ferritin is associated with light production in the mucus of the marine worm Chaetopterus. Sci Rep 2016; 6:36854. [PMID: 27830745 PMCID: PMC5103273 DOI: 10.1038/srep36854] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 10/21/2016] [Indexed: 11/09/2022] Open
Abstract
The blue glow of the mucus from Chaetopterus involves a photoprotein, iron and flavins. Identity and respective role of these components remain, however, largely unresolved today, likely because of viscosity issues and inhibition of this system by oxidizers conventionally used to track bioluminescence activity. Here, we used gentle centrifugation to obtain a mucus supernatant showing no inhibition to oxidizers, allowing for further analysis. We applied conventional chromatographic techniques to isolate major proteins associated with light emission. Luminescence ability of elutriate fractions was tested with hydrogen peroxide to track photoprotein and/or protein-bound chromophore. Fractions producing light contained few major proteins, one with similarity to ferritin. Addition to the mucus of elements with inhibitory/potentiary effect on ferritin ferroxidase activity induced corresponding changes in light production, emphasizing the possible role of ferritin in the worm bioluminescence. DNA of the protein was cloned, sequenced, and expressed, confirming its identity to a Chaetopterus Ferritin (ChF). Both ferric and ferrous iron were found in the mucus, indicating the occurrence of both oxidase and reductase activity. Biochemical analysis showed ChF has strong ferroxidase activity, which could be a source of biological iron and catalytic energy for the worm bioluminescence when coupled to a reduction process with flavins.
Collapse
Affiliation(s)
- Renu Rawat
- Scripps Institution of Oceanography, Marine Biology Research Division, University of California San Diego, 9500 Gillman Drive, La Jolla, CA 92093, USA
| | - Dimitri D Deheyn
- Scripps Institution of Oceanography, Marine Biology Research Division, University of California San Diego, 9500 Gillman Drive, La Jolla, CA 92093, USA
| |
Collapse
|
9
|
Bocchinfuso DG, Taylor P, Ross E, Ignatchenko A, Ignatchenko V, Kislinger T, Pearson BJ, Moran MF. Proteomic profiling of the planarian Schmidtea mediterranea and its mucous reveals similarities with human secretions and those predicted for parasitic flatworms. Mol Cell Proteomics 2012; 11:681-91. [PMID: 22653920 PMCID: PMC3434776 DOI: 10.1074/mcp.m112.019026] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/17/2012] [Indexed: 11/06/2022] Open
Abstract
The freshwater planarian Schmidtea mediterranea has been used in research for over 100 years, and is an emerging stem cell model because of its capability of regenerating large portions of missing body parts. Exteriorly, planarians are covered in mucous secretions of unknown composition, implicated in locomotion, predation, innate immunity, and substrate adhesion. Although the planarian genome has been sequenced, it remains mostly unannotated, challenging both genomic and proteomic analyses. The goal of the current study was to annotate the proteome of the whole planarian and its mucous fraction. The S. mediterranea proteome was analyzed via mass spectrometry by using multidimensional protein identification technology with whole-worm tryptic digests. By using a proteogenomics approach, MS data were searched against an in silico translated planarian transcript database, and by using the Swiss-Prot BLAST algorithm to identify proteins similar to planarian queries. A total of 1604 proteins were identified. The mucous subproteome was defined through analysis of a mucous trail fraction and an extract obtained by treating whole worms with the mucolytic agent N-acetylcysteine. Gene Ontology analysis confirmed that the mucous fractions were enriched with secreted proteins. The S. mediterranea proteome is highly similar to that predicted for the trematode Schistosoma mansoni associated with intestinal schistosomiasis, with the mucous subproteome particularly highly conserved. Remarkably, orthologs of 119 planarian mucous proteins are present in human mucosal secretions and tear fluid. We suggest planarians have potential to be a model system for the characterization of mucous protein function and relevant to parasitic flatworm infections and diseases underlined by mucous aberrancies, such as cystic fibrosis, asthma, and other lung diseases.
Collapse
Affiliation(s)
- Donald G. Bocchinfuso
- From the ‡Molecular Structure and Function Program, The Hospital for Sick Children, Toronto, Canada
- §Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Paul Taylor
- From the ‡Molecular Structure and Function Program, The Hospital for Sick Children, Toronto, Canada
| | - Eric Ross
- ¶Stowers Institute for Medical Research, Kansas City, Missouri
| | | | | | - Thomas Kislinger
- From the ‡Molecular Structure and Function Program, The Hospital for Sick Children, Toronto, Canada
- **Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Bret J. Pearson
- §Department of Molecular Genetics, University of Toronto, Toronto, Canada
- ‡‡Developmental and Stem Cell Biology Program, The Hospital for Sick Children; and
| | - Michael F. Moran
- From the ‡Molecular Structure and Function Program, The Hospital for Sick Children, Toronto, Canada
- §Department of Molecular Genetics, University of Toronto, Toronto, Canada
- ‖Ontario Cancer Institute, University Health Network
- §§Banting and Best Department of Medical Research, University of Toronto, MaRS Centre, 101 College Street, Toronto, ON, M5G 1L7, Canada
| |
Collapse
|
10
|
Doucet-Beaupré H, Dubé C, Breton S, Pörtner HO, Blier PU. Thermal sensitivity of metabolic enzymes in subarctic and temperate freshwater mussels (Bivalvia: Unionoida). J Therm Biol 2010. [DOI: 10.1016/j.jtherbio.2009.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
11
|
Brownlee IA, Knight J, Dettmar PW, Pearson JP. Action of reactive oxygen species on colonic mucus secretions. Free Radic Biol Med 2007; 43:800-8. [PMID: 17664143 DOI: 10.1016/j.freeradbiomed.2007.05.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 05/16/2007] [Accepted: 05/17/2007] [Indexed: 12/12/2022]
Abstract
Reactive oxygen species (ROS) have been implicated in the pathogenesis of many colonic diseases. Mucus is the colon's first line of defence against luminal agents. This study has therefore characterised ROS action on colonic mucus secretions. ROS were produced using peroxide-based systems of different concentrations. The effects of these systems were tested on native colonic mucus gels, isolated colonic mucins, and in vivo models. Colonic mucus gels were resistant to ROS breakdown. Mucins were susceptible to ROS attack, causing loss of terminal sugars and protein and mucin fragmentation. The in vivo thickness of the mucus barrier was reduced by up to 50% by ROS (above 5 mM peroxide). A 5 mM peroxide caused a significant increase in resting mucus thickness of ca. 15%. All ROS-generating systems caused mucosal damage once the loosely adherent mucus had been removed. As native mucus gel is more resistant to ROS damage than purified mucin, nonmucin components of mucus may have extensive ROS-scavenging properties. Low levels of luminal colonic ROS increase the protection afforded by the mucus barrier in vivo. Higher levels of ROS significantly reduce this protection. In vitro modeling of mucus degradation by ROS does not necessarily correlate with the dynamic, in vivo situation.
Collapse
Affiliation(s)
- Iain A Brownlee
- Epithelial group, Institute for Cell and Molecular Biosciences, University of Newcastle-upon-Tyne, Newcastle-upon-Tyne, NE2 4HH, UK.
| | | | | | | |
Collapse
|
12
|
Monserrat JM, Martínez PE, Geracitano LA, Lund Amado L, Martinez Gaspar Martins C, Lopes Leães Pinho G, Soares Chaves I, Ferreira-Cravo M, Ventura-Lima J, Bianchini A. Pollution biomarkers in estuarine animals: critical review and new perspectives. Comp Biochem Physiol C Toxicol Pharmacol 2007; 146:221-234. [PMID: 17045848 DOI: 10.1016/j.cbpc.2006.08.012] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2006] [Revised: 08/24/2006] [Accepted: 08/30/2006] [Indexed: 11/16/2022]
Abstract
In this review, recent developments in monitoring toxicological responses in estuarine animals are analyzed, considering the biomarker responses to different classes of pollutants. The estuarine environment imposes stressful conditions to the organisms that inhabit it, and this situation can alter their sensitivity to many pollutants. The specificity of some biomarkers like metallothionein tissue concentration is discussed in virtue of its dependence on salinity, which is highly variable in estuaries. Examples of cholinesterase activity measurements are also provided and criteria to select sensitive enzymes to detect pesticides and toxins are discussed. Regarding non-specific biomarkers, toxic responses in terms of antioxidant defenses and/or oxidative damage are also considered in this review, focusing on invertebrate species. In addition, the presence of an antioxidant gradient along the body of the estuarine polychaete Laeonereis acuta (Nereididae) and its relationship to different strategies, which deal with the generation of oxidative stress, is reviewed. Also, unusual antioxidant defenses against environmental pro-oxidants are discussed, including the mucus secreted by L. acuta. Disruption of osmoregulation by pollutants is of paramount importance in several estuarine species. In some cases such as in the estuarine crab Chasmagnathus granulatus, there is a trade off between bioavailability of toxicants (e.g. metals) and their interaction with key enzymes such as Na(+)-K(+)-ATPase and carbonic anhydrase. Thus, the metal effect on osmoregulation is also discussed in the present review. Finally, field case studies with fish species like the croaker Micropogonias furnieri (Scianidae) are used to illustrate the application of DNA damage and immunosuppressive responses as potential biomarkers of complex mixture of pollutants.
Collapse
Affiliation(s)
- José M Monserrat
- Departamento de Ciências Fisiológicas, Fundação Universidade Federal do Rio Grande (FURG), Av. Itália km 8, Campus Carreiros, 96.201-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil.
| | - Pablo E Martínez
- Departamento de Ciências Fisiológicas, Fundação Universidade Federal do Rio Grande (FURG), Av. Itália km 8, Campus Carreiros, 96.201-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil; Programa de Pós-Graduação em Oceanografia Biológica (FURG), Brazil
| | - Laura A Geracitano
- Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil
| | - Lílian Lund Amado
- Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil
| | | | | | | | - Marlize Ferreira-Cravo
- Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil
| | - Juliane Ventura-Lima
- Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil
| | - Adalto Bianchini
- Departamento de Ciências Fisiológicas, Fundação Universidade Federal do Rio Grande (FURG), Av. Itália km 8, Campus Carreiros, 96.201-900, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas-Fisiologia Animal Comparada (FURG), Brazil; Programa de Pós-Graduação em Oceanografia Biológica (FURG), Brazil
| |
Collapse
|