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Nunes RR, Tassinari ID, Zang J, Galvan Andrade MK, Machado Colucci AC, Müller Hoff ML, De Oliveira MR, Paz AH, de Fraga LS. Therapeutic hypothermia is limited in preventing developmental impairments after neonatal hypoxia-ischemia. Dev Neurosci 2023:000534919. [PMID: 37906982 DOI: 10.1159/000534919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 10/25/2023] [Indexed: 11/02/2023] Open
Abstract
The only current treatment for neonatal hypoxia-ischemia (HI) is therapeutic hypothermia (TH), which still shows some limitations. Specific effects of TH in the several processes involved in brain injury progression remain unclear. In this study, the effects of TH treatment on developmental parameters, behavioral outcomes, and peripheral leukocytes were evaluated in neonatal male and female rats. In P7, animals were submitted to right common carotid artery occlusion followed by hypoxia (8% oxygen). TH was performed by reducing the animal scalp temperature to 32°C for 5 h. Behavioral parameters and developmental landmarks were evaluated. Animals were euthanized at P9 or P21, and cerebral hemispheres, spleen, and thymus were weighed. White blood cells (WBC) were counted in blood smears. There was a reduction in the weight of the brain hemisphere ipsilateral to the carotid occlusion in HI and TH groups, as well as a reduction in body weight gain and a delay in the opening of the ipsilateral eye. Latency in negative geotaxis was increased by HI at P12. TH did not prevent brain weight loss, developmental impairments, or WBC number changes but prevented negative geotaxis impairment and spleen weight reduction. These data reinforce that a better understanding of the events that occur after HI and TH in both males and females is necessary and would allow the development of more adequate and sex-specific therapeutic approaches.
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Simões LAR, Vogt ÉL, da Costa CS, de Amaral M, Hoff MLM, Graceli JB, Vinagre AS. Effects of tributyltin (TBT) on the intermediate metabolism of the crab Callinectes sapidus. Mar Pollut Bull 2022; 182:114004. [PMID: 35939934 DOI: 10.1016/j.marpolbul.2022.114004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 05/05/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
This study investigated if the exposure to tributyltin (TBT), a chemical used worldwide in boat antifouling paints, could result in metabolic disturbances in the blue crab Callinectes sapidus. After the exposure to TBT 100 or 1000 ng.L-1 for 48 and 96 h, hemolymph and tissues were collected to determine the concentration of metabolites and lipid peroxidation. The levels of glucose, lactate, cholesterol, and triglycerides in the hemolymph were not affected by TBT exposure. Hemolymph protein and heart glycogen increased in the crabs exposed to TBT 1000 for 96 h. Anterior gills protein and lipoperoxidation decreased after 96 h in all groups. These results suggest that C. sapidus can maintain energy homeostasis when challenged by the TBT exposure for 48 h and that metabolic alterations initiate after 96 h.
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Affiliation(s)
- Leonardo Airton Ressel Simões
- Comparative Metabolism and Endocrinology Laboratory (LAMEC), Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Éverton Lopes Vogt
- Comparative Metabolism and Endocrinology Laboratory (LAMEC), Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | - Marjoriane de Amaral
- Comparative Metabolism and Endocrinology Laboratory (LAMEC), Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Mariana Leivas Müller Hoff
- Comparative Metabolism and Endocrinology Laboratory (LAMEC), Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | | | - Anapaula Sommer Vinagre
- Comparative Metabolism and Endocrinology Laboratory (LAMEC), Department of Physiology, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Costa SR, Velasques RR, Hoff MLM, Souza MM, Sandrini JZ. Characterization of different DNA repair pathways in hepatic cells of Zebrafish (Danio rerio). DNA Repair (Amst) 2019; 83:102695. [DOI: 10.1016/j.dnarep.2019.102695] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/15/2019] [Accepted: 08/26/2019] [Indexed: 01/03/2023]
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Hoff MLM, Fabrizius A, Czech-Damal NU, Folkow LP, Burmester T. Transcriptome Analysis Identifies Key Metabolic Changes in the Hooded Seal (Cystophora cristata) Brain in Response to Hypoxia and Reoxygenation. PLoS One 2017; 12:e0169366. [PMID: 28046118 PMCID: PMC5207758 DOI: 10.1371/journal.pone.0169366] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 12/15/2016] [Indexed: 11/21/2022] Open
Abstract
The brain of diving mammals tolerates low oxygen conditions better than the brain of most terrestrial mammals. Previously, it has been demonstrated that the neurons in brain slices of the hooded seal (Cystophora cristata) withstand hypoxia longer than those of mouse, and also tolerate reduced glucose supply and high lactate concentrations. This tolerance appears to be accompanied by a shift in the oxidative energy metabolism to the astrocytes in the seal while in terrestrial mammals the aerobic energy production mainly takes place in neurons. Here, we used RNA-Seq to compare the effect of hypoxia and reoxygenation in vitro on brain slices from the visual cortex of hooded seals. We saw no general reduction of gene expression, suggesting that the response to hypoxia and reoxygenation is an actively regulated process. The treatments caused the preferential upregulation of genes related to inflammation, as found before e.g. in stroke studies using mammalian models. Gene ontology and KEGG pathway analyses showed a downregulation of genes involved in ion transport and other neuronal processes, indicative for a neuronal shutdown in response to a shortage of O2 supply. These differences may be interpreted in terms of an energy saving strategy in the seal's brain. We specifically analyzed the regulation of genes involved in energy metabolism. Hypoxia and reoxygenation caused a similar response, with upregulation of genes involved in glucose metabolism and downregulation of the components of the pyruvate dehydrogenase complex. We also observed upregulation of the monocarboxylate transporter Mct4, suggesting increased lactate efflux. Together, these data indicate that the seal brain responds to the hypoxic challenge by a relative increase in the anaerobic energy metabolism.
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Affiliation(s)
| | - Andrej Fabrizius
- Institute of Zoology, Biocenter Grindel, University of Hamburg, Hamburg, Germany
| | | | - Lars P. Folkow
- Department of Arctic and Marine Biology, University of Tromsø – The Arctic University of Norway, Tromsø, Norway
| | - Thorsten Burmester
- Institute of Zoology, Biocenter Grindel, University of Hamburg, Hamburg, Germany
- * E-mail:
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Fabrizius A, Hoff MLM, Engler G, Folkow LP, Burmester T. When the brain goes diving: transcriptome analysis reveals a reduced aerobic energy metabolism and increased stress proteins in the seal brain. BMC Genomics 2016; 17:583. [PMID: 27507242 PMCID: PMC4979143 DOI: 10.1186/s12864-016-2892-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 07/06/2016] [Indexed: 12/19/2022] Open
Abstract
Background During long dives, the brain of whales and seals experiences a reduced supply of oxygen (hypoxia). The brain neurons of the hooded seal (Cystophora cristata) are more tolerant towards low-oxygen conditions than those of mice, and also better survive other hypoxia-related stress conditions like a reduction in glucose supply and high concentrations of lactate. Little is known about the molecular mechanisms that support the hypoxia tolerance of the diving brain. Results Here we employed RNA-seq to approach the molecular basis of the unusual stress tolerance of the seal brain. An Illumina-generated transcriptome of the visual cortex of the hooded seal was compared with that of the ferret (Mustela putorius furo), which served as a terrestrial relative. Gene ontology analyses showed a significant enrichment of transcripts related to translation and aerobic energy production in the ferret but not in the seal brain. Clusterin, an extracellular chaperone, is the most highly expressed gene in the seal brain and fourfold higher than in the ferret or any other mammalian brain transcriptome. The largest difference was found for S100B, a calcium-binding stress protein with pleiotropic function, which was 38-fold enriched in the seal brain. Notably, significant enrichment of S100B mRNA was also found in the transcriptomes of whale brains, but not in the brains of terrestrial mammals. Conclusion Comparative transcriptomics indicates a lower aerobic capacity of the seal brain, which may be interpreted as a general energy saving strategy. Elevated expression of stress-related genes, such as clusterin and S100B, possibly contributes to the remarkable hypoxia tolerance of the brain of the hooded seal. Moreover, high levels of S100B that possibly protect the brain appear to be the result of the convergent adaptation of diving mammals. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2892-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrej Fabrizius
- Institute of Zoology, Biocenter Grindel, University of Hamburg, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany
| | - Mariana Leivas Müller Hoff
- Institute of Zoology, Biocenter Grindel, University of Hamburg, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany
| | - Gerhard Engler
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Lars P Folkow
- Department of Arctic and Marine Biology, University of Tromsø - The Arctic University of Norway, NO-9037, Tromsø, Norway
| | - Thorsten Burmester
- Institute of Zoology, Biocenter Grindel, University of Hamburg, Martin-Luther-King-Platz 3, D-20146, Hamburg, Germany.
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Machado AADS, Hoff MLM, Klein RD, Cordeiro GJ, Lencina Avila JM, Costa PG, Bianchini A. Oxidative stress and DNA damage responses to phenanthrene exposure in the estuarine guppy Poecilia vivipara. Mar Environ Res 2014; 98:96-105. [PMID: 24722053 DOI: 10.1016/j.marenvres.2014.03.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 06/03/2023]
Abstract
Despite ubiquitous phenanthrene contamination in aquatic coastal areas, little is known regarding its potential effects on estuarine fishes. The present work evaluated the response of a large suite of oxidative stress- and DNA damage-related biomarkers to phenanthrene exposure (10, 20 and 200 μg L(-1), 96 h) using DMSO as the solvent in estuarine guppy Poecilia vivipara (salinity 24 psu). Phenanthrene affected oxidative stress-related parameters, and decreased antioxidant defenses and reactive oxygen species in the gills and muscle overall. Lipid peroxidation occurred in muscle at 200 μg L(-1) phenanthrene. Genotoxicity was increased at 20 μg L(-1), while 200 μg L(-1) caused a relative decrease in erythrocyte release into the bloodstream. These findings indicated that phenanthrene is genotoxic and can induce oxidative stress, depending on tissue and phenanthrene concentration analyzed. Thus, some of the biomarkers analyzed in the present study are sufficiently sensitive to monitor the exposure of the guppy P. vivipara to phenanthrene in salt water. However, further studies are required for a better interpretation of the dose-response patterns observed.
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Affiliation(s)
- Anderson Abel de Souza Machado
- Universidade Federal do Rio Grande, Programa de Pós-Graduação em Oceanografia Biológica, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Mariana Leivas Müller Hoff
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Roberta Daniele Klein
- Universidade Federal do Rio Grande, Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Gilson Junior Cordeiro
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Jannine Marquez Lencina Avila
- Universidade Federal do Rio Grande, Instituto de Oceanografia, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Patrícia Gomes Costa
- Universidade Federal do Rio Grande, Instituto de Oceanografia, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
| | - Adalto Bianchini
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil.
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Machado AADS, Hoff MLM, Klein RD, Cardozo JG, Giacomin MM, Pinho GLL, Bianchini A. Biomarkers of waterborne copper exposure in the guppy Poecilia vivipara acclimated to salt water. Aquat Toxicol 2013; 138-139:60-69. [PMID: 23721848 DOI: 10.1016/j.aquatox.2013.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 04/12/2013] [Accepted: 04/19/2013] [Indexed: 06/02/2023]
Abstract
The responses of a large suite of biochemical and genetic parameters were evaluated in tissues (liver, gills, muscle and erythrocytes) of the estuarine guppy Poecilia vivipara exposed to waterborne copper in salt water (salinity 24 ppt). Activities of antioxidant enzymes (superoxide dismutase, catalase, glutathione reductase, and glutathione S-transferase), metallothionein-like protein concentration, reactive oxygen species (ROS) content, antioxidant capacity against peroxyl radicals (ACAP), and lipid peroxidation (LPO) were evaluated in liver, gills, and muscle. Comet assay score and nuclear abnormalities and micronucleated cell frequency were analyzed in peripheral erythrocytes. The responses of these parameters were evaluated in fish exposed (96 h) to environmentally relevant copper concentrations (5, 9 and 20 μg L⁻¹). In control and copper-exposed fish, no mortality was observed over the experimental period. Almost all biochemical and genetic parameters proved to be affected by waterborne copper exposure. However, the response of catalase activity in liver, ROS, ACAP and LPO in muscle, gills and liver, and DNA damages in erythrocytes clearly showed to be dependent on copper concentration in salt water. Therefore, the use of these parameters could be of relevance in the scope of biomonitoring programs in salt water environments contaminated with copper.
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Affiliation(s)
- Anderson Abel de Souza Machado
- Universidade Federal do Rio Grande, Programa de Pós-Graduação em Oceanografia Biológica, Av. Itália km 8, 96201-900 Rio Grande, Rio Grande do Sul, Brazil
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Scheffer DDL, Pinho CA, Hoff MLM, Da Silva LA, Benetti M, Moreira JCF, Pinho RA. Impacto do triatlon ironman sobre os parametros de estresse oxidative. DOI:10.5007/1980-0037.2012v14n2p174. Rev Bras Cineantropom Desempenho Hum 2012. [DOI: 10.5007/1980-0037.2012v14n2p174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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de Oliveira MR, Soares Oliveira MW, Müller Hoff ML, Behr GA, da Rocha RF, Fonseca Moreira JC. Evaluation of redox and bioenergetics states in the liver of vitamin A-treated rats. Eur J Pharmacol 2009; 610:99-105. [PMID: 19324036 DOI: 10.1016/j.ejphar.2009.03.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 03/04/2009] [Accepted: 03/15/2009] [Indexed: 12/19/2022]
Abstract
Vitamin A is normally stored in the mammalian liver and is physiologically released depending on the need of the organism for the vitamin. However, there is a compelling evidence showing that even the liver is affected by conditions of high vitamin A intake. Based on these previously reported findings showing negative effects of vitamin A on mammalian tissues, we have investigated the effects of a supplementation with vitamin A at clinical doses (1000-9000 IU/kg day(-1)) on some rat liver parameters. We have analyzed hepatic redox environment, as well as the activity of the mitochondrial electron transfer chain in vitamin A-treated rats. Additionally, activity of the detoxifying enzyme glutathione S-transferase was checked. Also, caspase-3 and caspase-8 and tumor necrosis factor-alpha levels were quantified to assess either cell death or inflammation effects of vitamin A on rat liver. We found increased free radical production and, consequently, increased oxidative damage in biomolecules in the liver of vitamin A-treated rats. Interestingly, we found increased mitochondrial electron transfer chain activity, as well as glutathione-S-transferase enzyme activity. Neither caspases activity, nor tumor necrosis factor-alpha levels change in this experimental model. Our results suggest a pro-oxidant, but not pro-inflammatory effect of vitamin A on rat liver.
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Affiliation(s)
- Marcos R de Oliveira
- Centro de Estudos em Estresse Oxidativo (Lab. 32), Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Av. Ramiro Barcelos, 2600-Anexo, CEP 90035-003, Porto Alegre, RS, Brazil.
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