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Dose A, Kennington WJ, Evans JP. Heat stress mediates toxicity of rutile titanium dioxide nanoparticles on fertilisation capacity in the broadcast spawning mussel Mytilus galloprovincialis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175567. [PMID: 39153630 DOI: 10.1016/j.scitotenv.2024.175567] [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: 07/08/2024] [Revised: 08/13/2024] [Accepted: 08/14/2024] [Indexed: 08/19/2024]
Abstract
Titanium dioxide nanoparticle (nTiO2) pollution of marine environments is rapidly increasing with potentially deleterious effects on wildlife. Yet, the impacts of nTiO2 on reproduction remain poorly understood. This is especially the case for broadcast spawners, who are likely to be more severely impacted by environmental disturbances because their gametes are directly exposed to the environment during fertilisation. In addition, it is unclear whether rising water temperatures will further exacerbate the impact of nTiO2 toxicity. Here, in a series of fertilisation trials, we systematically examine the main and interactive effects of nTiO2 exposure and seawater temperature on fertilisation success in the Mediterranean mussel Mytilus galloprovincialis. Specifically, our fertilisation trials explored whether nTiO2 exposure influences fertilisation rates when (i) eggs alone are exposed, (ii) both sperm and eggs are exposed simultaneously, and (iii) whether increases in seawater temperature interact with nTiO2 exposure to influence fertilisation rates. We also ask whether changes in nTiO2 concentrations influence key sperm motility traits using computer-assisted sperm analysis (CASA). In fertilisation trials for treatment groups (i) and (ii), we found no main effects of nTiO2 at environmentally relevant concentrations of 5, 10 and 50 μg L-1 on fertilisation capacity relative to the control. Consistent with these findings, we found no effect of nTiO2 exposure on sperm motility. However, in treatment group (iii), when fertilisation trials were conducted at higher temperatures (+6 °C), exposure of gametes from both sexes to 10 μg L-1 nTiO2 led to a reduction in fertilisation rates that was significantly greater than when gametes were exposed to elevated temperature alone. These interacting effects of nTiO2 exposure and seawater temperature demonstrate the toxic potential of nTiO2 for fertilisation processes in a system that is likely to be impacted heavily by predicted future increases in sea surface temperatures.
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Affiliation(s)
- Annika Dose
- School of Biological Sciences, University of Western Australia, 6009, WA, Australia.
| | - Winn Jason Kennington
- School of Biological Sciences, University of Western Australia, 6009, WA, Australia.
| | - Jonathan Paul Evans
- School of Biological Sciences, University of Western Australia, 6009, WA, Australia.
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2
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Diaz T, Treidel LA, Menze MA, Williams CM, Lebenzon JE. Beclin-mediated Autophagy Drives Dorsal Longitudinal Flight Muscle Histolysis in the Variable Field Cricket, Gryllus lineaticeps. Integr Comp Biol 2024; 64:565-575. [PMID: 38760886 DOI: 10.1093/icb/icae042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/01/2024] [Accepted: 05/06/2024] [Indexed: 05/20/2024] Open
Abstract
Flight muscle histolysis is a widespread strategy used by insects to break down functional flight muscle and modulate the energetic costs associated with flight muscle use and maintenance. The variable field cricket, Gryllus lineaticeps, undergoes histolysis during their transition between dispersal flight and reproduction. Despite the importance of histolysis on insect reproduction and fitness, the molecular mechanisms driving this flight muscle breakdown are not well understood. Here, we show that beclin-mediated autophagy, a conserved lysosomal-dependent degradation process, drives breakdown of dorsal longitudinal flight muscle in female flight-capable G. lineaticeps. We found that female G. lineaticeps activate autophagy in their dorsal longitudinal flight muscle (DLM), but to a greater extent than the neighboring dorsoventral flight muscle (DVM) during histolysis. RNA interference knockdown of beclin, a gene that encodes a critical autophagy initiation protein, delayed DLM histolysis, but did not affect DVM histolysis. This suggests that crickets selectively activate autophagy to break down the DLMs, while maintaining DVM function for other fitness-relevant activities such as walking. Overall, we confirmed that autophagy is a critical pathway used to remodel flight muscle cells during flight muscle histolysis, providing novel insights into the mechanisms underlying a major life history transition between dispersal and reproduction.
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Affiliation(s)
- Tomás Diaz
- Department of Integrative Biology, University of California Berkeley, 2040 Valley Life Sciences Building, Berkeley, CA 94720, USA
| | - Lisa A Treidel
- School of Biological Sciences, University of Nebraska Lincoln, 1104 T Street, Lincoln, NE 68588, USA
| | - Michael A Menze
- Department of Biology, University of Louisville, 139 Life Sciences Bldg. Louisville, KY 40292, USA
| | - Caroline M Williams
- Department of Integrative Biology, University of California Berkeley, 2040 Valley Life Sciences Building, Berkeley, CA 94720, USA
| | - Jacqueline E Lebenzon
- Department of Integrative Biology, University of California Berkeley, 2040 Valley Life Sciences Building, Berkeley, CA 94720, USA
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3
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Queirós V, Azeiteiro UM, Santos JL, Alonso E, Soares AMVM, Barata C, Freitas R. Unravelling biochemical responses in the species Mytilus galloprovincialis exposed to the antineoplastics ifosfamide and cisplatin under different temperature scenarios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 943:173668. [PMID: 38839013 DOI: 10.1016/j.scitotenv.2024.173668] [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: 04/26/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/07/2024]
Abstract
This study investigates the chronic impact of two of the most widely consumed antineoplastic drugs, Ifosfamide (IF) and Cisplatin (CDDP), on the bivalve species Mytilus galloprovincialis under current (17 °C) and predicted warming conditions (21 °C). Accompanying the expected increase in worldwide cancer incidence, antineoplastics detection in the aquatic environment is also expected to rise. Mussels were exposed to varying concentrations of IF (10, 100, 500 ng/L) and CDDP (10, 100, 1000 ng/L) for 28 days. Biochemical analyses focused on metabolic, antioxidant and biotransformation capacities, cellular damage, and neurotoxicity. Results showed temperature-dependent variations in biochemical responses. Metabolic capacity remained stable in mussels exposed to IF, while CDDP exposure increased it at 1000 ng/L for both temperatures. Antioxidant enzyme activities were unaffected by IF, but CDDP activated them, particularly at 21 °C. Biotransformation capacity was unchanged by IF but enhanced by CDDP. Nevertheless, cellular damage occurred at CDDP concentrations above 100 ng/L, regardless of temperature. Integrated biomarker responses highlighted CDDP's greater impact, emphasizing the critical role of temperature in shaping organismal responses and underscoring the complexity of environmental stressor interactions.
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Affiliation(s)
- Vanessa Queirós
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ulisses M Azeiteiro
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Juan Luis Santos
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África 7, 41011 Sevilla, Spain
| | - Esteban Alonso
- Departamento de Química Analítica, Escuela Politécnica Superior, Universidad de Sevilla, C/ Virgen de África 7, 41011 Sevilla, Spain
| | - Amadeu M V M Soares
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Carlos Barata
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, C/ Jordi Girona 18, 08034 Barcelona, Spain
| | - Rosa Freitas
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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4
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Penim J, Beauchaud M, Millot M, Faria AM, Vieira M, Fonseca PJ, Vasconcelos RO, Amorim MCP. Turning up the heat: Effects of temperature on agonistic acoustic communication in the two-spotted goby (Pomatoschistus flavescens). MARINE ENVIRONMENTAL RESEARCH 2024; 202:106714. [PMID: 39243576 DOI: 10.1016/j.marenvres.2024.106714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 08/16/2024] [Accepted: 08/26/2024] [Indexed: 09/09/2024]
Abstract
Acoustic communication is linked to fitness traits in many animals, but under the current scenario of global warming, sound signals can be affected by rising temperatures, particularly in ectothermic organisms such as fishes. This study examines the effect of water temperature in acoustic communication in the two-spotted goby, Pomatoschistus flavescens. To address this, we looked at the effect of different temperatures on the acoustic features of drums produced by males during territorial defence and related it with their auditory sensitivity. We also analysed the differences in acoustic features between male agonistic drums and previously reported male courtship sounds, to better understand how acoustic communication may be affected by different temperature conditions. We recorded two-spotted goby males during territorial intrusions for 10 min at 16 °C, 19 °C, and 21 °C in the laboratory. We found that agonistic drums were shorter, had fewer pulses and shorter pulse periods at higher temperature, in contrast with the peak frequency that remained unaffected. Male agonistic and mating drums (recorded in a previous study) at 16 °C only differed in pulse period, which was higher in mating drums. Hearing thresholds obtained with Auditory Evoked Potentials at 16 °C, revealed higher sensitivity below 400 Hz, matching the main energy of agonistic and mating sounds. Our findings suggest that increasing temperature could potentially affect acoustic communication in this species by reducing the duration of agonistic drums, which might hinder effective communication. Nevertheless, the impact may not be significant as there was a good match between the best hearing sensitivity and the peak frequency range of their calls, which was not influenced by temperature. As fish and other organisms are increasingly threatened by multiple anthropogenic stressors, including warming, future research should address how changes in water temperature impact acoustic communication within a more realistic multi-stressor scenario.
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Affiliation(s)
- Jorge Penim
- EPCV - Department of Life Sciences, Lusófona University, Lisbon, Portugal; Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Marilyn Beauchaud
- Equipe de Neuro-Ethologie Sensorielle, ENES/CRNL, CNRS UMR 5292, INSERM UMR-S 1028, UCBL1, Faculté des Sciences et Techniques, Université Jean-Monnet (UJM), Saint-Étienne, France
| | - Morgane Millot
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Portugal; MARE - Marine and Environmental Sciences Centre / ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Ana M Faria
- CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros Do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Manuel Vieira
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Portugal; MARE - Marine and Environmental Sciences Centre / ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Paulo J Fonseca
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Portugal; cE3c - Center for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Raquel O Vasconcelos
- EPCV - Department of Life Sciences, Lusófona University, Lisbon, Portugal; MARE - Marine and Environmental Sciences Centre / ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Portugal; Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China
| | - M Clara P Amorim
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Portugal; MARE - Marine and Environmental Sciences Centre / ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, Portugal.
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5
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Chen S, Li Q, Shi H, Li F, Duan Y, Guo Q. New insights into the role of mitochondrial dynamics in oxidative stress-induced diseases. Biomed Pharmacother 2024; 178:117084. [PMID: 39088967 DOI: 10.1016/j.biopha.2024.117084] [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: 03/28/2024] [Revised: 06/29/2024] [Accepted: 07/01/2024] [Indexed: 08/03/2024] Open
Abstract
The accumulation of excess reactive oxygen species (ROS) can lead to oxidative stress (OS), which can induce gene mutations, protein denaturation, and lipid peroxidation directly or indirectly. The expression is reduced ATP level in cells, increased cytoplasmic Ca2+, inflammation, and so on. Consequently, ROS are recognized as significant risk factors for human aging and various diseases, including diabetes, cardiovascular diseases, and neurodegenerative diseases. Mitochondria are involved in the production of ROS through the respiratory chain. Abnormal mitochondrial characteristics, including mitochondrial OS, mitochondrial fission, mitochondrial fusion, and mitophagy, play an important role in various tissues. However, previous excellent reviews focused on OS-induced diseases. In this review, we focus on the latest progress of OS-induced mitochondrial dynamics, discuss OS-induced mitochondrial damage-related diseases, and summarize the OS-induced mitochondrial dynamics-related signaling pathways. Additionally, it elaborates on potential therapeutic methods aimed at preventing oxidative stress from further exacerbating mitochondrial disorders.
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Affiliation(s)
- Sisi Chen
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qilong Li
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hanjing Shi
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, College of Life Sciences, Hunan Normal University, Changsha 410081, China
| | - Fengna Li
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yehui Duan
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiuping Guo
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Key Laboratory of Agro⁃Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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6
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Persson PB, Persson AB. Evolutionary physiology. Acta Physiol (Oxf) 2024:e14221. [PMID: 39207025 DOI: 10.1111/apha.14221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024]
Affiliation(s)
- Pontus B Persson
- Institute of Translational Physiology, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité-Universitätsmedizin Berlin
| | - Anja Bondke Persson
- Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité-Universitätsmedizin Berlin
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7
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Cunha M, Petrillo V, Madeira M, He Y, Coppola F, Meucci V, De Marchi L, Soares AMVM, Freitas R. The influence of temperature on the impacts of caffeine in mussels: Evaluating subcellular impacts and model predictions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 940:173453. [PMID: 38802017 DOI: 10.1016/j.scitotenv.2024.173453] [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: 02/14/2024] [Revised: 04/23/2024] [Accepted: 05/20/2024] [Indexed: 05/29/2024]
Abstract
In aquatic ecosystems, the presence of pharmaceuticals, particularly caffeine (CAF), has been linked to wastewater discharge, hospital waste, and the disposal of expired pharmaceutical products containing CAF. Additionally, rising temperatures due to climate change are anticipated in aquatic environments. This study aimed to assess the toxicity of various CAF concentrations under current (17 °C) and projected (21 °C) temperature conditions, using the mussel Mytilus galloprovincialis as a bioindicator species. Subcellular impacts were evaluated following 28 days of exposure to four CAF concentrations (0.5; 1.0; 5.0; 10.0 μg/L) at the control temperature (17 °C). Only effects at an environmentally relevant CAF concentration (5.0 μg/L) were assessed at the highest temperature (21 °C). The overall biochemical response of mussels was evaluated using non-metric Multidimensional Scaling (MDS) and the Integrated Biomarker Response (IBR) index, while the Independent Action (IA) model was used to compare observed and predicted responses. Results showed that at 17 °C, increased CAF concentrations were associated with higher metabolism and biotransformation capacity, accompanied by cellular damage at the highest concentration. Conversely, under warming conditions (21 °C), the induction of antioxidant enzymes was observed, although insufficient to prevent cellular damage compared to the control temperature. Regarding neurotoxicity, at 17 °C, the activity of the acetylcholinesterase enzyme was inhibited up to 5.0 μg/L; however, at 10.0 μg/L, activity increased, possibly due to CAF competition for adenosine receptors. The IA model identified a synergistic response for most parameters when CAF and warming acted together, aligning with observed results, albeit with slightly lower magnitudes.
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Affiliation(s)
- Marta Cunha
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Vincenzo Petrillo
- Department of Biology, University of Naples Federico II, 80126, Italy
| | - Madalena Madeira
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Yide He
- School of Environmental Science and Engineering, Nanjing Tech University, Jiangsu 211816, PR China; Sino-portuguese Joint International Laboratory of Aquatic Toxicology, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816 Jiangsu Province, China
| | - Francesca Coppola
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal; Centre for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Valentina Meucci
- Department of Veterinary Sciences, University of Pisa, 56122 San Piero a Grado, PI, Italy
| | - Lucia De Marchi
- Department of Veterinary Sciences, University of Pisa, 56122 San Piero a Grado, PI, Italy
| | - 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
| | - 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.
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Valencia-Cayetano C, López-Martínez J, Padilla-Serrato JG, Flores-Garza R, García-Ibáñez S, Méndez-Bahena A. Growth patterns and population dynamics of Chiton articulatus (Mollusca: Polyplacophora): A multi-decade study. MARINE ENVIRONMENTAL RESEARCH 2024; 199:106604. [PMID: 38908113 DOI: 10.1016/j.marenvres.2024.106604] [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: 04/10/2024] [Revised: 05/22/2024] [Accepted: 06/09/2024] [Indexed: 06/24/2024]
Abstract
The edible chiton Chiton articulatus is a commercially important mollusk found in the rocky intertidal zones of the Mexican tropical Pacific. Despite the intense harvesting in Acapulco Bay, Mexico, knowledge of its growth patterns is limited, hindering the development of effective management strategies. This study investigated the growth dynamics of C. articulatus using a multi-model inference approach based on size structure data collected in four sampling periods covering four decades. Results revealed continuous recruitment throughout the year, contributing to population resilience. The species exhibited growth plasticity, highlighting its adaptive potential. We found complex temporal patterns influenced mainly by climatic events. The El Niño event sowed higher growth rates and lower asymptotic length, while La Niña events showed the opposite pattern. This research provides insights into the growth dynamics of C. articulatus, highlighting the need for holistic management strategies for this commercially important species in the face of environmental change.
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Affiliation(s)
- Carlos Valencia-Cayetano
- Facultad de Ecología Marina (FEM), Universidad Autónoma de Guerrero (UAGro), Acapulco, Guerrero, Mexico
| | - Juana López-Martínez
- Centro de Investigaciones Biológicas del Noroeste, S.C. Unidad Guaymas (CIBNOR), Sonora, Mexico
| | - Jesús Guadalupe Padilla-Serrato
- Facultad de Ecología Marina (FEM), Universidad Autónoma de Guerrero (UAGro), Acapulco, Guerrero, Mexico; Investigadoras e Investigadores por México, Consejo Nacional Humanidades, Ciencias y Tecnologías (CONAHCyT), Ciudad de México, Mexico.
| | - Rafael Flores-Garza
- Facultad de Ecología Marina (FEM), Universidad Autónoma de Guerrero (UAGro), Acapulco, Guerrero, Mexico
| | - Sergio García-Ibáñez
- Facultad de Ecología Marina (FEM), Universidad Autónoma de Guerrero (UAGro), Acapulco, Guerrero, Mexico
| | - Alfredo Méndez-Bahena
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Guerrero, Guerrero, Mexico
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9
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Blanchard A, Aminot M, Gould N, Léger A, Pichaud N. Flies on the rise: acclimation effect on mitochondrial oxidation capacity at normal and high temperatures in Drosophila melanogaster. J Exp Biol 2024; 227:jeb247706. [PMID: 38841909 DOI: 10.1242/jeb.247706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 05/28/2024] [Indexed: 06/07/2024]
Abstract
Increased average temperatures and extreme thermal events (such as heatwaves) brought forth by climate change impose important constraints on aerobic metabolism. Notably, mitochondrial metabolism, which is affected by both long- and short-term temperature changes, has been put forward as an important determinant for thermal tolerance of organisms. This study examined the influence of phenotypic plasticity on metabolic and physiological parameters in Drosophila melanogaster and the link between mitochondrial function and their upper thermal limits. We showed that D. melanogaster acclimated to 15°C have a 0.65°C lower critical thermal maximum (CTmax) compared with those acclimated to 24°C. Drosophila melanogaster acclimated to 15°C exhibited a higher proportion of shorter saturated and monounsaturated fatty acids, concomitant with lower proportions of polyunsaturated fatty acids. No mitochondrial quantitative changes (fractional area and number) were detected between acclimation groups, but changes of mitochondrial oxidation capacities were observed. Specifically, in both 15°C- and 24°C-acclimated flies, complex I-induced respiration was increased when measured between 15 and 24°C, but drastically declined when measured at 40°C. When succinate and glycerol-3-phosphate were added, this decrease was however compensated for in flies acclimated to 24°C, suggesting an important impact of acclimation on mitochondrial function related to thermal tolerance. Our study reveals that the use of oxidative substrates at high temperatures is influenced by acclimation temperature and strongly related to upper thermal tolerance as a difference of 0.65°C in CTmax translates into significant mitochondrial changes.
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Affiliation(s)
- Arianne Blanchard
- New Brunswick Centre for Precision Medicine, Moncton, NB E1C8X3, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB E1A 3E9, Canada
| | - Mélanie Aminot
- New Brunswick Centre for Precision Medicine, Moncton, NB E1C8X3, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB E1A 3E9, Canada
| | - Nathalie Gould
- New Brunswick Centre for Precision Medicine, Moncton, NB E1C8X3, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB E1A 3E9, Canada
| | - Adèle Léger
- New Brunswick Centre for Precision Medicine, Moncton, NB E1C8X3, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB E1A 3E9, Canada
| | - Nicolas Pichaud
- New Brunswick Centre for Precision Medicine, Moncton, NB E1C8X3, Canada
- Department of Chemistry and Biochemistry, Université de Moncton, Moncton, NB E1A 3E9, Canada
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10
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Zhan L, He J, Meng S, Guo Z, Chen Y, Storey KB, Zhang J, Yu D. Mitochondrial Protein-Coding Gene Expression in the Lizard Sphenomorphus incognitus (Squamata:Scincidae) Responding to Different Temperature Stresses. Animals (Basel) 2024; 14:1671. [PMID: 38891717 PMCID: PMC11170996 DOI: 10.3390/ani14111671] [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: 05/06/2024] [Revised: 05/25/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024] Open
Abstract
In the context of global warming, the frequency of severe weather occurrences, such as unexpected cold spells and heat waves, will grow, as well as the intensity of these natural disasters. Lizards, as a large group of reptiles, are ectothermic. Their body temperatures are predominantly regulated by their environment and temperature variations directly impact their behavior and physiological activities. Frequent cold periods and heat waves can affect their biochemistry and physiology, and often their ability to maintain their body temperature. Mitochondria, as the center of energy metabolism, are crucial for maintaining body temperature, regulating metabolic rate, and preventing cellular oxidative damage. Here, we used RT-qPCR technology to investigate the expression patterns and their differences for the 13 mitochondrial PCGs in Sphenomorphus incognitus (Squamata:Scincidae), also known as the brown forest skink, under extreme temperature stress at 4 °C, 8 °C, 34 °C, and 38 °C for 24 h, compared to the control group at 25 °C. In southern China, for lizards, 4 °C is close to lethal, and 8 °C induces hibernation, while 34/38 °C is considered hot and environmentally realistic. Results showed that at a low temperature of 4 °C for 24 h, transcript levels of ATP8, ND1, ND4, COI, and ND4L significantly decreased, to values of 0.52 ± 0.08, 0.65 ± 0.04, 0.68 ± 0.10, 0.28 ± 0.02, and 0.35 ± 0.02, respectively, compared with controls. By contrast, transcript levels of COIII exhibited a significant increase, with a mean value of 1.86 ± 0.21. However, exposure to 8 °C for 24 h did not lead to an increase in transcript levels. Indeed, transcript levels of ATP6, ATP8, ND1, ND3, and ND4 were significantly downregulated, to 0.48 ± 0.11, 0.68 ± 0.07, 0.41 ± 0.08, 0.54 ± 0.10, and 0.52 ± 0.07, respectively, as compared with controls. Exposure to a hot environment of 34 °C for 24 h led to an increase in transcript levels of COI, COII, COIII, ND3, ND5, CYTB, and ATP6, with values that were 3.3 ± 0.24, 2.0 ± 0.2, 2.70 ± 1.06, 1.57 ± 0,08, 1.47 ± 0.13, 1.39 ± 0.56, and 1.86 ± 0.12, respectively, over controls. By contrast, ND4L exhibited a significant decrease (to 0.31 ± 0.01) compared with controls. When exposed to 38 °C, the transcript levels of the 13 PCGs significantly increased, ranging from a 2.04 ± 0.23 increase in ND1 to a 6.30 ± 0.96 rise in ND6. Under two different levels of cold and heat stress, the expression patterns of mitochondrial genes in S. incognitus vary, possibly associated with different strategies employed by this species in response to low and high temperatures, allowing for rapid compensatory adjustments in mitochondrial electron transport chain proteins in response to temperature changes. Furthermore, this underscores once again the significant role of mitochondrial function in determining thermal plasticity in reptiles.
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Affiliation(s)
- Lemei Zhan
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Jingyi He
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Siqi Meng
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Zhiqiang Guo
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Yuxin Chen
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Kenneth B. Storey
- Department of Biology, Carleton University, Ottawa, ON K1S5B6, Canada;
| | - Jiayong Zhang
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
| | - Danna Yu
- College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China; (L.Z.)
- Key Lab of Wildlife Biotechnology, Conservation and Utilization of Zhejiang Province, Zhejiang Normal University, Jinhua 321004, China
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11
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Adzigbli L, Ponsuksili S, Sokolova I. Mitochondrial responses to constant and cyclic hypoxia depend on the oxidized fuel in a hypoxia-tolerant marine bivalve Crassostrea gigas. Sci Rep 2024; 14:9658. [PMID: 38671046 PMCID: PMC11053104 DOI: 10.1038/s41598-024-60261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 04/21/2024] [Indexed: 04/28/2024] Open
Abstract
Sessile benthic organisms like oysters inhabit the intertidal zone, subject to alternating hypoxia and reoxygenation (H/R) episodes during tidal movements, impacting respiratory chain activities and metabolome compositions. We investigated the effects of constant severe hypoxia (90 min at ~ 0% O2 ) followed by 10 min reoxygenation, and cyclic hypoxia (5 cycles of 15 min at ~ 0% O2 and 10 min reoxygenation) on isolated mitochondria from the gill and the digestive gland of Crassostrea gigas respiring on pyruvate, palmitate, or succinate. Constant hypoxia suppressed oxidative phosphorylation (OXPHOS), particularly during Complex I-linked substrates oxidation. It had no effect on mitochondrial reactive oxygen species (ROS) efflux but increased fractional electron leak (FEL). In mitochondria oxidizing Complex I substrates, exposure to cyclic hypoxia prompted a significant drop after the first H/R cycle. In contrast, succinate-driven respiration only showed significant decline after the third to fifth H/R cycle. ROS efflux saw little change during cyclic hypoxia regardless of the oxidized substrate, but Complex I-driven FEL tended to increase with each subsequent H/R cycle. These observations suggest that succinate may serve as a beneficial stress fuel under H/R conditions, aiding in the post-hypoxic recovery of oysters by reducing oxidative stress and facilitating rapid ATP re-synthesis. The impacts of constant and cyclic hypoxia of similar duration on mitochondrial respiration and oxidative lesions in the proteins were comparable indicating that the mitochondrial damage is mostly determined by the lack of oxygen and mitochondrial depolarization. The ROS efflux in the mitochondria of oysters was minimally affected by oxygen fluctuations indicating that tight regulation of ROS production may contribute to robust mitochondrial phenotype of oysters and protect against H/R induced stress.
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Affiliation(s)
- Linda Adzigbli
- Institute for Farm Animal Biology, Institute of Genome Biology, Dummerstorf, Germany
- Department of Marine Biology, Institute for Biological Sciences, University of Rostock, Rostock, Germany
| | - Siriluck Ponsuksili
- Institute for Farm Animal Biology, Institute of Genome Biology, Dummerstorf, Germany
| | - Inna Sokolova
- Department of Marine Biology, Institute for Biological Sciences, University of Rostock, Rostock, Germany.
- Department of Maritime Systems, Interdisciplinary Faculty, University of Rostock, Rostock, Germany.
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12
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Azizan A, Venter L, Zhang J, Young T, Ericson JA, Delorme NJ, Ragg NLC, Alfaro AC. Interactive effects of elevated temperature and Photobacterium swingsii infection on the survival and immune response of marine mussels (Perna canaliculus): A summer mortality scenario. MARINE ENVIRONMENTAL RESEARCH 2024; 196:106392. [PMID: 38364448 DOI: 10.1016/j.marenvres.2024.106392] [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: 10/20/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/18/2024]
Abstract
The New Zealand Greenshell™ mussel (Perna canaliculus) is an economically important aquaculture species. Prolonged increases in seawater temperature above mussel thermotolerance ranges pose a significant threat to mussel survival and health, potentially increasing susceptibility to bacterial infections. Using challenge experiments, this study examined the combined effects of increased seawater temperature and bacterial (Photobacterium swingsii) infection on animal survival, haemocyte and biochemical responses of adult mussels. Mussels maintained at three temperatures (16, 20 and 24 °C) for seven days were either not injected (control), injected with sterile marine broth (injection control) or P. swingsii (challenged with medium and high doses) and monitored daily for five days. Haemolymph and tissue samples were collected at 24, 48, 72, 96, 120 h post-challenge and analysed to quantify bacterial colonies, haemocyte responses and biochemical responses. Mussels infected with P. swingsii exhibited mortalities at 20 and 24 °C, likely due to a compromised immune system, but no mortalities were observed when temperature was the only stressor. Bacterial colony counts in haemolymph decreased over time, suggesting bacterial clearance followed by the activation of immune signalling pathways. Total haemocyte counts and viability data supports haemocyte defence functions being stimulated in the presence of high pathogen loads at 24 °C. In the gill tissue, oxidative stress responses, measured as total antioxidant capacity and malondialdehyde (MDA) levels, were higher in infected mussels (compared to the controls) after 24h and 120h post-challenge at the lowest (16 °C) and highest temperatures (24 °C), indicating the presence of oxidative stress due to temperature and pathogen stressors. Overall, this work confirms that Photobacterium swingsii is pathogenic to P. canaliculus and indicates that mussels may be more vulnerable to bacterial pathogens under conditions of elevated temperature, such as those predicted under future climate change scenarios.
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Affiliation(s)
- Awanis Azizan
- Aquaculture Biotechnology Research Group, Department of Environmental Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand
| | - Leonie Venter
- Aquaculture Biotechnology Research Group, Department of Environmental Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand
| | - Jingjing Zhang
- Aquaculture Biotechnology Research Group, Department of Environmental Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand; The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand
| | - Tim Young
- Aquaculture Biotechnology Research Group, Department of Environmental Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand; Centre for Biomedical & Chemical Sciences, School of Science, Auckland University of Technology, Auckland, New Zealand
| | | | | | - Norman L C Ragg
- Cawthron Institute, Private Bag 2, Nelson, 7042, New Zealand
| | - Andrea C Alfaro
- Aquaculture Biotechnology Research Group, Department of Environmental Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand.
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13
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Pappalardo AM, Calogero GS, Šanda R, Giuga M, Ferrito V. Evidence for Selection on Mitochondrial OXPHOS Genes in the Mediterranean Killifish Aphanius fasciatus Valenciennes, 1821. BIOLOGY 2024; 13:212. [PMID: 38666824 PMCID: PMC11048645 DOI: 10.3390/biology13040212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024]
Abstract
Mitochondrial oxidative phosphorylation (OXPHOS) genes are a system subject to selection under determined environmental constraints despite a neutral evolution model that has long been hypothesized for the mitochondrial genome. In this study, the sequences of ND1, Cytb, and COI OXPHOS genes were analyzed in six populations of the eurythermal and euryhaline killifish A. fasciatus, to detect non-synonymous mutations leading to amino acid changes and to check whether selection acted on them using tests of recombination and selection. The results indicate a high COI and Cytb gene diversity and a high percentage of private haplotypes in all populations. In the Greek population, non-synonymous nucleotide substitutions were observed in the N-terminal region of COI and Cytb. Positively selected sites were also found. The information we obtained from the mitochondrial DNA sequences of A. fasciatus adds to the growing data on selective pressure acting on mitochondrial DNA in non-model species. These results should be explored from the perspective of the local adaptation of eurythermal and euryhaline species and supported using experimental evidence to better understand the interplay between historical climatic events and local adaptation and how each of them contributes to shaping the genetic structure of this species.
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Affiliation(s)
- Anna Maria Pappalardo
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology “M. La Greca”, University of Catania, Via Androne 81, 95124 Catania, Italy; (G.S.C.); (M.G.)
| | - Giada Santa Calogero
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology “M. La Greca”, University of Catania, Via Androne 81, 95124 Catania, Italy; (G.S.C.); (M.G.)
| | - Radek Šanda
- National Museum of the Czech Republic, Václavské Náměstí 68, 115 79 Prague, Czech Republic;
| | - Marta Giuga
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology “M. La Greca”, University of Catania, Via Androne 81, 95124 Catania, Italy; (G.S.C.); (M.G.)
- Institute for the Study of Anthropic Impact and Sustainability in the Marine Environment (IAS-CNR), Via De Marini 6, 16149 Genova, Italy
| | - Venera Ferrito
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology “M. La Greca”, University of Catania, Via Androne 81, 95124 Catania, Italy; (G.S.C.); (M.G.)
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14
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Persson PB, Persson AB. Plasticity. Acta Physiol (Oxf) 2024; 240:e14112. [PMID: 38343346 DOI: 10.1111/apha.14112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 02/24/2024]
Affiliation(s)
- Pontus B Persson
- Institute of Translational Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Anja Bondke Persson
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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15
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Dallas JW, Kazarina A, Lee STM, Warne RW. Cross-species gut microbiota transplantation predictably affects host heat tolerance. J Exp Biol 2024; 227:jeb246735. [PMID: 38073469 PMCID: PMC10906491 DOI: 10.1242/jeb.246735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/29/2023] [Indexed: 01/11/2024]
Abstract
The gut microbiome is known to influence and have regulatory effects in diverse physiological functions of host animals, but only recently has the relationship between host thermal biology and gut microbiota been explored. Here, we examined how early-life manipulations of the gut microbiota in larval amphibians influenced their critical thermal maximum (CTmax) at different acclimation temperatures. We stripped the resident microbiome from egg masses of wild-caught wood frogs (Lithobates sylvaticus) via an antibiotic wash, and then inoculated the eggs with pond water (control), no inoculation, or the intestinal microbiota of another species that has a wider thermal tolerance - green frogs (Lithobates clamitans). We predicted that this cross-species transplant would increase the CTmax of the recipient wood frog larvae relative to the other treatments. In line with this prediction, green frog microbiome-recipient larvae had the highest CTmax while those with no inoculum had the lowest CTmax. Both the microbiome treatment and acclimation temperature significantly influenced the larval gut microbiota communities and α-diversity indices. Green frog microbiome-inoculated larvae were enriched in Rikenellaceae relative to the other treatments, which produce short-chain fatty acids and could contribute to greater energy availability and enhanced heat tolerance. Larvae that received no inoculation had a higher relative abundance of potentially pathogenic Aeromonas spp., which negatively affects host health and performance. Our results are the first to show that cross-species gut microbiota transplants alter heat tolerance in a predictable manner. This finding has repercussions for the conservation of species that are threatened by climate change and demonstrates a need to further explore the mechanisms by which the gut microbiota modulate host thermal tolerance.
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Affiliation(s)
- Jason W. Dallas
- Southern Illinois University,School of Biological Sciences, 1125 Lincoln Dr., Carbondale, IL 62901-6501, USA
| | - Anna Kazarina
- Kansas State University, Division of Biology, 1717 Claflin Rd, Manhattan, KS 66506, USA
| | - Sonny T. M. Lee
- Kansas State University, Division of Biology, 1717 Claflin Rd, Manhattan, KS 66506, USA
| | - Robin W. Warne
- Southern Illinois University,School of Biological Sciences, 1125 Lincoln Dr., Carbondale, IL 62901-6501, USA
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16
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Matsumoto H, Azuma N, Chiba S. Effects of heatwave events on the seagrass-dwelling crustacean Pandalus latirostris in a subarctic lagoon. MARINE ENVIRONMENTAL RESEARCH 2023; 192:106226. [PMID: 37866199 DOI: 10.1016/j.marenvres.2023.106226] [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: 08/27/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/24/2023]
Abstract
Heatwaves often cause mass mortality of organisms in seagrass areas, and they eventually alter some ecological functions of seagrass ecosystems. In subarctic regions, however, the effects of heatwaves on seagrass areas are still unclear. In a subarctic lagoon of northern Japan, we examined the effects of heatwaves on the Hokkai shrimp, Pandalus latirostris, a commercially exploited species distributed in seagrass areas of northern Japan and eastern Russia. A long-term survey of the surface water temperature in the lagoon clarified a gradual increase in the frequency and intensity of heatwave events since 1999. Surveys of the water temperature at a seagrass area in the lagoon during summer have also demonstrated that the maximum water temperature had been exceeding 25 °C, unusually high for this location, regardless of water depth. These results indicate that the effects of heatwaves in seagrass areas in a subarctic region had become as severe as those in tropical and temperate regions. We also experimentally evaluated the effects of this unusually high water temperature (25 °C) on the survival of P. latirostris by changing the length of exposure time. Some individuals suffered damage to their intestinal mucosal structure after exposure for 12 h or longer, and all individuals died after exposure for 120 h. Our results suggest that heatwaves possibly cause mass mortality in P. latirostris in the following sequence: heat stress, damage to the intestinal epithelial mucosal structure, degradation of nutrient absorption and immunological function of the intestine, energy deficiency and disease infection, and finally mortality. This study, conducted in subarctic closed waters, concludes that it is essential to become familiar with not only trends in heatwaves but also the intermittent occurrence of unusually high water temperature in seagrass areas in order to better understand the process of mortality of organisms that inhabit these ecosystems.
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Affiliation(s)
- Hiroyuki Matsumoto
- Graduate School of Ocean and Fisheries Sciences, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan.
| | - Noriko Azuma
- Department of Ocean and Fisheries Sciences, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Susumu Chiba
- Graduate School of Ocean and Fisheries Sciences, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan; Department of Ocean and Fisheries Sciences, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
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17
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Georgoulis I, Bock C, Lannig G, Pörtner HO, Sokolova IM, Feidantsis K, Giantsis IA, Michaelidis B. Heat hardening enhances metabolite-driven thermoprotection in the Mediterranean mussel Mytilus galloprovincialis. Front Physiol 2023; 14:1244314. [PMID: 37841313 PMCID: PMC10570847 DOI: 10.3389/fphys.2023.1244314] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/20/2023] [Indexed: 10/17/2023] Open
Abstract
Introduction: Temperature affects organisms' metabolism and ecological performance. Owing to climate change, sea warming constituting a severe source of environmental stress for marine organisms, since it increases at alarming rates. Rapid warming can exceed resilience of marine organisms leading to fitness loss and mortality. However, organisms can improve their thermal tolerance when briefly exposed to sublethal thermal stress (heat hardening), thus generating heat tolerant phenotypes. Methods: We investigated the "stress memory" effect caused by heat hardening on M. galloprovincialis metabolite profile of in order to identify the underlying biochemical mechanisms, which enhance mussels' thermal tolerance. Results: The heat hardening led to accumulation of amino acids (e.g., leucine, isoleucine and valine), including osmolytes and cytoprotective agents with antioxidant and anti-inflammatory properties that can contribute to thermal protection of the mussels. Moreover, proteolysis was inhibited and protein turnover regulated by the heat hardening. Heat stress alters the metabolic profile of heat stressed mussels, benefiting the heat-hardened individuals in increasing their heat tolerance compared to the non-heat-hardened ones. Discussion: These findings provide new insights in the metabolic mechanisms that may reinforce mussels' tolerance against thermal stress providing both natural protection and potential manipulative tools (e.g., in aquaculture) against the devastating climate change effects on marine organisms.
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Affiliation(s)
- Ioannis Georgoulis
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Environmental Control and Research Laboratory, Region of Central Macedonia, Thessaloniki, Greece
| | - Christian Bock
- Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research, Integrative Ecophysiology, Bremerhaven, Germany
| | - Gisela Lannig
- Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research, Integrative Ecophysiology, Bremerhaven, Germany
| | - Hans O. Pörtner
- Alfred Wegener Institute, Helmholtz-Centre for Polar and Marine Research, Integrative Ecophysiology, Bremerhaven, Germany
| | - Inna M. Sokolova
- Department of Marine Biology, Institute of Biological Sciences, University of Rostock, Rostock, Germany
| | - Konstantinos Feidantsis
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Environmental Control and Research Laboratory, Region of Central Macedonia, Thessaloniki, Greece
- Department of Fisheries and Aquaculture, University of Patras, Mesolonghi, Greece
| | - Ioannis A. Giantsis
- Environmental Control and Research Laboratory, Region of Central Macedonia, Thessaloniki, Greece
- Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, Kozani, Greece
| | - Basile Michaelidis
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Environmental Control and Research Laboratory, Region of Central Macedonia, Thessaloniki, Greece
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18
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Roussel D, Janillon S, Teulier L, Pichaud N. Succinate oxidation rescues mitochondrial ATP synthesis at high temperature in Drosophila melanogaster. FEBS Lett 2023; 597:2221-2229. [PMID: 37463836 DOI: 10.1002/1873-3468.14701] [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: 04/05/2023] [Revised: 06/05/2023] [Accepted: 07/03/2023] [Indexed: 07/20/2023]
Abstract
Decreased NADH-induced and increased reduced FADH2 -induced respiration rates at high temperatures are associated with thermal tolerance in Drosophila. Here, we determined whether this change was associated with adjustments of adenosine triphosphate (ATP) production rate and coupling efficiency (ATP/O) in Drosophila melanogaster. We show that decreased pyruvate + malate oxidation at 35°C is associated with a collapse of ATP synthesis and a drop in ATP/O ratio. However, adding succinate triggered a full compensation of both oxygen consumption and ATP synthesis rates at this high temperature. Addition of glycerol-3-phosphate (G3P) led to a huge increase in respiration with no further advantage in terms of ATP production. We conclude that succinate is the only alternative substrate able to compensate both oxygen consumption and ATP production rates during oxidative phosphorylation at high temperature, which has important implications for thermal adaptation.
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Affiliation(s)
- Damien Roussel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France
| | - Sonia Janillon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5558 LBBE, Villeurbanne, France
| | - Loïc Teulier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France
| | - Nicolas Pichaud
- Department of Chemistry and Biochemistry, Université de Moncton, New Brunswick, Canada
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19
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Steffen JBM, Sokolov EP, Bock C, Sokolova IM. Combined effects of salinity and intermittent hypoxia on mitochondrial capacity and reactive oxygen species efflux in the Pacific oyster, Crassostrea gigas. J Exp Biol 2023; 226:jeb246164. [PMID: 37470191 PMCID: PMC10445735 DOI: 10.1242/jeb.246164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023]
Abstract
Coastal environments commonly experience fluctuations in salinity and hypoxia-reoxygenation (H/R) stress that can negatively affect mitochondrial functions of marine organisms. Although intertidal bivalves are adapted to these conditions, the mechanisms that sustain mitochondrial integrity and function are not well understood. We determined the rates of respiration and reactive oxygen species (ROS) efflux in the mitochondria of oysters, Crassostrea gigas, acclimated to high (33 psu) or low (15 psu) salinity, and exposed to either normoxic conditions (control; 21% O2) or short-term hypoxia (24 h at <0.01% O2) and subsequent reoxygenation (1.5 h at 21% O2). Further, we exposed isolated mitochondria to anoxia in vitro to assess their ability to recover from acute (∼10 min) oxygen deficiency (<0.01% O2). Our results showed that mitochondria of oysters acclimated to high or low salinity did not show severe damage and dysfunction during H/R stress, consistent with the hypoxia tolerance of C. gigas. However, acclimation to low salinity led to improved mitochondrial performance and plasticity, indicating that 15 psu might be closer to the metabolic optimum of C. gigas than 33 psu. Thus, acclimation to low salinity increased mitochondrial oxidative phosphorylation rate and coupling efficiency and stimulated mitochondrial respiration after acute H/R stress. However, elevated ROS efflux in the mitochondria of low-salinity-acclimated oysters after acute H/R stress indicates a possible trade-off of higher respiration. The high plasticity and stress tolerance of C. gigas mitochondria may contribute to the success of this invasive species and facilitate its further expansion into brackish regions such as the Baltic Sea.
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Affiliation(s)
- Jennifer B. M. Steffen
- Department of Marine Biology, Institute of Biological Sciences, University of Rostock, 18059 Rostock, Germany
| | - Eugene P. Sokolov
- Leibniz Institute for Baltic Research, Leibniz Science Campus Phosphorus Research Rostock, 18119 Warnemünde, Germany
| | - Christian Bock
- Integrative Ecophysiology, Alfred-Wegener-Institute Helmholtz Centre for Polar and Marine Research, 27570 Bremerhaven, Germany
| | - Inna M. Sokolova
- Department of Marine Biology, Institute of Biological Sciences, University of Rostock, 18059 Rostock, Germany
- Department of Maritime Systems, Interdisciplinary Faculty, University of Rostock, 18059 Rostock, Germany
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20
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Lebenzon JE, Overgaard J, Jørgensen LB. Chilled, starved or frozen: Insect mitochondrial adaptations to overcome the cold. CURRENT OPINION IN INSECT SCIENCE 2023:101076. [PMID: 37331596 DOI: 10.1016/j.cois.2023.101076] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/13/2023] [Accepted: 06/13/2023] [Indexed: 06/20/2023]
Abstract
Physiological adaptations to tackle cold exposure are crucial for insects living in temperate and arctic environments and here we review how cold adaptation is manifested in terms of mitochondrial function. Cold challenges are diverse, and different insect species have evolved metabolic and mitochondrial adaptations to: i) energize homeostatic regulation at low temperature, ii) stretch energy reserves during prolonged cold exposure, and iii) preserve structural organization of organelles following extracellular freezing. While the literature is still sparse, our review suggests that cold-adapted insects preserve ATP production at low temperatures by maintaining preferred mitochondrial substrate oxidation, which is otherwise challenged in cold-sensitive species. Chronic cold exposure and metabolic depression during dormancy is linked to reduced mitochondrial metabolism and may involve mitochondrial degradation. Finally, adaptation to extracellular freezing could be associated with superior structural integrity of the mitochondrial inner membrane following freezing which is linked to cellular and organismal survival.
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Affiliation(s)
- Jacqueline E Lebenzon
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
| | - Johannes Overgaard
- Section for Zoophysiology, Department of Biology, Aarhus University, 8000 Aarhus C, Denmark.
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21
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Dallas JW, Warne RW. Ranavirus infection does not reduce heat tolerance in a larval amphibian. J Therm Biol 2023; 114:103584. [PMID: 37209633 DOI: 10.1016/j.jtherbio.2023.103584] [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: 02/26/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/22/2023]
Abstract
Extreme heat events and emerging infectious diseases negatively impact wildlife populations, but the interacting effects of infection and host heat tolerance remain understudied. The few studies covering this subject have demonstrated that pathogens lower the heat tolerance of their hosts, which places infected hosts at a greater risk experiencing lethal heat stress. Here, we studied how ranavirus infection influenced heat tolerance in larval wood frogs (Lithobates sylvaticus). In line with similar studies, we predicted the elevated costs of ranavirus infection would lower heat tolerance, measured as critical thermal maximum (CTmax), compared to uninfected controls. Ranavirus infection did not reduce CTmax and there was a positive relationship between CTmax and viral loads. Our results demonstrate that ranavirus-infected wood frog larvae had no loss in heat tolerance compared to uninfected larvae, even at viral loads associated with high mortality rates, which contradicts the common pattern for other pathogenic infections in ectotherms. Larval anurans may prioritize maintenance of their CTmax when infected with ranavirus to promote selection of warmer temperatures during behavioral fever that can improve pathogen clearance. Our study represents the first to examine the effect of ranavirus infection on host heat tolerance, and because no decline in CTmax was observed, this suggests that infected hosts would not be under greater risk of heat stress.
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Affiliation(s)
- Jason W Dallas
- School of Biological Sciences, Southern Illinois University Carbondale, 1125 Lincoln Street, Carbondale, IL, 62901, USA.
| | - Robin W Warne
- School of Biological Sciences, Southern Illinois University Carbondale, 1125 Lincoln Street, Carbondale, IL, 62901, USA
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