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Mlingi FT, Burgerhout E, Mommens M, Tveiten H, Tomkiewicz J, Kjørsvik E, Puvanendran V. Reproductive performance of lumpfish (Cyclopterus lumpus, L. 1758) females: Effects of integrated photoperiod and temperature manipulations on sexual maturation and spawning. PLoS One 2024; 19:e0311735. [PMID: 39405313 PMCID: PMC11478831 DOI: 10.1371/journal.pone.0311735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2024] [Accepted: 09/24/2024] [Indexed: 10/19/2024] Open
Abstract
A successful control of sexual maturation is crucial for year-round production of lumpfish juveniles destined as cleaner fish in Atlantic salmon aquaculture. This study investigated the combined effects of photoperiod and temperature manipulations on sexual maturation and spawning in lumpfish females. Lumpfish juveniles were exposed to simulated natural and nine-month compressed annual photoperiods, with subsequent temperature elevation. Body weight (BW), condition factor (K), gonadosomatic index (GSI), ovarian development, plasma levels of 17β-estradiol (E2), testosterone (T) and 11-ketotestosterone (11-KT), and spawning were assessed. Compressing the natural photoperiod caused a clear increase and decrease in GSI, T, 11-KT and E2 towards and during the spawning period. Before the temperature elevation, GSI, T, 11-KT, E2 and ovarian development were advanced in the compressed photoperiod. After the temperature elevation, GSI, T, 11-KT and E2 fluctuated more in the compressed photoperiod, while in the natural photoperiod, E2 declined, and GSI, T and 11-KT increased. Spawning was advanced by 1 month in the compressed photoperiod compared to the natural photoperiod. Temperature elevation led to higher levels, earlier peaks and declines of T, 11-KT or E2 in both photoperiods, and advanced spawning by 1.5 months in the compressed photoperiod compared to the natural photoperiod. Temperature elevation also led to increased ovulation recruitment and increased cumulative weight of spawned eggs in the natural photoperiod. Compressing the natural photoperiod and elevating temperature can thus advance sexual maturation and spawning in lumpfish females. Due to the lower amounts of spawned egg weights in the high temperature compressed photoperiod, further studies on effects of photoperiod and timing of temperature manipulations on spawning, fecundity and egg quality could optimize the photothermal manipulations on lumpfish broodstock.
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Affiliation(s)
- Frank Thomas Mlingi
- Department of Biology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | | | - Maren Mommens
- Department of Breeding and Research and Development, AquaGen AS, Trondheim, Norway
| | - Helge Tveiten
- Norwegian College of Fisheries Science, UiT The Arctic University of Norway, Tromsø, Norway
| | - Jonna Tomkiewicz
- National Institute of Aquatic Resources, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Elin Kjørsvik
- Department of Biology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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Jain A, Singh S, Kumar M. Herbicide paraquat dichloride augments the expression of the c-abl-noxa-apoptotic pathway, instigating ovarian atresia in edible fish, Channa punctatus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34875-6. [PMID: 39340605 DOI: 10.1007/s11356-024-34875-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 08/27/2024] [Indexed: 09/30/2024]
Abstract
Ovarian cells of animals undergo atresia to regulate egg numbers and their release. However, unrestrained atretic activity decreases the chances of oocyte maturity and further process, ultimately resulting in a reduced population. Edible fishes are a critical source of nutrition and it is required to regulate their population. The application of herbicides at fish production sites is a threat to their population by altering female reproductive activity. In concern to this, here, this 60-day study investigates herbicide paraquat dichloride (PD)-induced atresia in ovarian cells of Channa punctatus (C. punctatus). Further, 96-h LC50 of PD for C. punctatus was calculated as 58.40 mg/L. At the end of each exposure period, an increase in intracellular ROS in blood cells and activities of SOD and CAT in ovary tissue were observed in PD-treated fish with increasing concentration. The frequency of micronuclei in blood cells subsequently increased with the highest PD concentration. A significant (p < 0.05) increase in the relative expression of target genes was observed at the 30th and 60th day of the sampling periods in the fish treated with the highest concentration of PD. The histological study confirmed the occurrence of atretic ovary cells in PD-exposed fish. From the results it can be concluded that PD enhances the uncontrolled death of ovarian cells and has consequences of impairing the ovary health and reproductive potential of fish, hence reducing the fish population.
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Affiliation(s)
- Anamika Jain
- Department of Zoology, Environmental Toxicology & Bioremediation Laboratory (ETBL), University of Lucknow, Lucknow, 226007, India
| | - Shefalee Singh
- Department of Zoology, Environmental Toxicology & Bioremediation Laboratory (ETBL), University of Lucknow, Lucknow, 226007, India
| | - Manoj Kumar
- Department of Zoology, Environmental Toxicology & Bioremediation Laboratory (ETBL), University of Lucknow, Lucknow, 226007, India.
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3
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Villa-Villaseñor IM, Herrera-Vargas MA, Yáñez-Rivera B, Uribe MC, Rueda-Jasso RA, Phillips-Farfán BV, Mar-Silva V, Meléndez-Herrera E, Domínguez-Domínguez O. Realistic nitrate concentrations diminish reproductive indicators in Skiffia lermae, an endemic species in critical endangered status. PeerJ 2024; 12:e17876. [PMID: 39267944 PMCID: PMC11391940 DOI: 10.7717/peerj.17876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 07/16/2024] [Indexed: 09/15/2024] Open
Abstract
Goodeinae is a subfamily of critically endangered fish native to central Mexico. Populations of Skiffia lermae, a species belonging to this subfamily, have significantly decreased in the past two decades. A previous study showed that S. lermae is sensitive to acute nitrate-nitrogen (NO3-N) exposure, leading to noticeable changes in both behavioral and histopathological bioindicators. The aim herein was to determine the vulnerability of S. lermae to NO3-N exposure at realistic concentrations registered in freshwater ecosystems in central Mexico where the species was historically reported. Offspring of S. lermae were chronically exposed during 60 days to concentrations of 5, 10 and 20 mg NO3-N/L, with 2 mg NO3-N/L used as the reference value (control). Survival rate, feeding behavior, aquatic surface respiration, body growth, scaled mass index, immature red blood cells, as well as histopathological changes in branchial, hepatic and gonadal tissues were evaluated. Additionally, this study analyzed water quality in freshwater ecosystems where S. lermae presently persists. The results showed decreased survival as NO3-N concentration increased, as well as increased feeding latency, aquatic surface respiration and histological damage in the gills and liver. These organs showed differential sex-dependent responses to NO3-N exposure; females were more sensitive than males. In the ovaries, a decreased density of stage III oocytes was associated with increased NO3-N concentrations. No changes were observed in body growth and number of immature red blood cells. Concentrations recorded in the three freshwater ecosystems that S. lermae inhabit were below 2 mg NO3-N/L. Together, the results could explain why the species has disappeared from more contaminated freshwater ecosystems where NO3-N levels exceed 5 mg/L. Moreover, the study warns about the risks of increasing NO3-N concentrations in the current sites where the species lives.
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Affiliation(s)
- Ivette Marai Villa-Villaseñor
- Programa Institucional de Doctorado en Ciencias Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Ma Antonia Herrera-Vargas
- Laboratorio de Ecofisiología Animal, Instituto de Investigaciones sobre Recursos Naturales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Beatriz Yáñez-Rivera
- Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán, Sinaloa, Mexico
| | - Mari Carmen Uribe
- Laboratorio de Biología de la Reproducción Animal, Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Ciudad de México, Mexico
| | - Rebeca Aneli Rueda-Jasso
- Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Bryan V Phillips-Farfán
- Laboratorio de Nutrición Experimental, Instituto Nacional de Pediatría, Ciudad de México, Mexico
| | - Valentin Mar-Silva
- Estancia Posdoctoral por México-CONACyT, Escuela Nacional de Estudios Superiores Unidad Morelia, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Esperanza Meléndez-Herrera
- Laboratorio de Ecofisiología Animal, Instituto de Investigaciones sobre Recursos Naturales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Omar Domínguez-Domínguez
- Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
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Lavecchia A, De Virgilio C, Mansi L, Manzari C, Mylonas CC, Picardi E, Pousis C, Cox SN, Ventriglia G, Zupa R, Pesole G, Corriero A. Comparison of ovarian mRNA expression levels in wild and hatchery-produced greater amberjack Seriola dumerili. Sci Rep 2024; 14:18034. [PMID: 39098967 PMCID: PMC11298523 DOI: 10.1038/s41598-024-69091-2] [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: 03/04/2024] [Accepted: 07/31/2024] [Indexed: 08/06/2024] Open
Abstract
The greater amberjack Seriola dumerili is a promising candidate for aquaculture production. This study compares the ovary transcriptome of greater amberjack sampled in the wild (WILD) with hatchery-produced breeders reared in aquaculture sea cages in the Mediterranean Sea. Among the seven sampled cultured fish, three were classified as reproductively dysfunctional (DysF group), while four showed no signs of reproductive alteration (NormalF group). The DysF fish showed 1,166 differentially expressed genes (DEGs) compared to WILD females, and 755 DEGs compared to the NormalF. According to gene ontology (GO) analysis, DysF females exhibited enrichment of genes belonging to the biological categories classified as Secreted, ECM-receptor interaction, and Focal adhesion. Protein-protein interaction analysis revealed proteins involved in the biological categories of ECM-receptor interaction, Enzyme-linked receptor protein signaling, Wnt signal transduction pathways, and Ovulation cycle. KEGG pathway analysis showed DEGs involved in 111 pathways, including Neuroactive ligand-receptor interaction, Steroid hormone biosynthesis, Cell cycle, Oocyte meiosis, Necroptosis, Ferroptosis, Apoptosis, Autophagy, Progesterone-mediated oocyte maturation, Endocytosis and Phagosome, as well as Hedgehog, Apelin, PPAR, Notch, and GnRH signalling pathways. Additionally, DysF females exhibited factors encoded by upregulated genes associated with hypogonadism and polycystic ovary syndrome in mammals. This study -which is part of a broader research effort examining the transcriptome of the entire reproductive axis in greater amberjack of both sexes-, enhances our comprehension of the mechanisms underlying the appearance of reproductive dysfunctions when fish are reared under aquaculture conditions.
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Affiliation(s)
- Anna Lavecchia
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Caterina De Virgilio
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Luigi Mansi
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Caterina Manzari
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Constantinos C Mylonas
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, 71003, Heraklion, Crete, Greece
| | - Ernesto Picardi
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Chrysovalentinos Pousis
- Department of Veterinary Medicine, University of Bari Aldo Moro, S.P. per Casamassima km.3, 70010, Valenzano, BA, Italy
| | - Sharon N Cox
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Gianluca Ventriglia
- Department of Veterinary Medicine, University of Bari Aldo Moro, S.P. per Casamassima km.3, 70010, Valenzano, BA, Italy
| | - Rosa Zupa
- Department of Veterinary Medicine, University of Bari Aldo Moro, S.P. per Casamassima km.3, 70010, Valenzano, BA, Italy
| | - Graziano Pesole
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Via Giovanni Amendola, 122/O, 70126, Bari, Italy
| | - Aldo Corriero
- Department of Veterinary Medicine, University of Bari Aldo Moro, S.P. per Casamassima km.3, 70010, Valenzano, BA, Italy.
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5
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Cossaboon JM, Teh SJ, Sant KE. Reproductive toxicity of DDT in the Japanese medaka fish model: Revisiting the impacts of DDT+ on female reproductive health. CHEMOSPHERE 2024; 357:141967. [PMID: 38615950 PMCID: PMC11160350 DOI: 10.1016/j.chemosphere.2024.141967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/21/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
The organochlorine pesticide dichlorodiphenyltrichloroethane (DDT) is an endocrine-disrupting compound (EDC) that has been banned by most countries for decades. However, it continues to be detected in nearly all humans and wildlife due to its biological and environmental persistence. The ovarian dysgenesis syndrome hypothesis speculates that exposure to EDCs during sensitive developmental windows such as early gonadal differentiation lead to reproductive disorders later in life. Yet, mechanisms by which DDT affects developing gonads remain unclear due to the inherent challenge of getting developmental exposure data from adults presenting with reproductive disease. The Japanese medaka (Oryzias latipes) is a valuable fish model for sex-specific toxicological studies due to its chromosomal sex determination, external embryonic development, short generation time, and extensively mapped genome. It is well documented that medaka exposed to DDT and its metabolites and byproducts (herein referred to as DDT+) at different developmental time points experience permanent alterations in gonadal morphology, reproductive success, and molecular and hormonal signaling. However, the overwhelming majority of studies focus primarily on functional and morphological outcomes in males and females and have rarely investigated long-term transcriptional or molecular effects. This review summarizes previous experimental findings and the state of our knowledge concerning toxic effects DDT + on reproductive development, fertility, and health in the valuable medaka model. It also identifies gaps in knowledge, emphasizing a need for more focus on molecular mechanisms of ovarian endocrine disruption using enhanced molecular tools that have become increasingly available over the past few decades. Furthermore, DDT forms a myriad of over 45 metabolites and transformation products in biota and the environment, very few of which have been evaluated for environmental abundance or health effects. This reinforces the demand for high throughput and economical in vivo models for predictive toxicology screening, and the Japanese medaka is uniquely positioned to meet this need.
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Affiliation(s)
| | - Swee J Teh
- School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
| | - Karilyn E Sant
- School of Public Health, San Diego State University, San Diego, CA, 92182, USA.
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Fakriadis I, Meiri-Ashkenazi I, Bracha C, Rosenfeld H, Corriero A, Zupa R, Pousis C, Papadaki M, Mylonas CC. Gonadotropin expression, pituitary and plasma levels in the reproductive cycle of wild and captive-reared greater amberjack (Seriola dumerili). Gen Comp Endocrinol 2024; 350:114465. [PMID: 38336122 DOI: 10.1016/j.ygcen.2024.114465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/23/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
We compared the endocrine status of the pituitary-gonad axis of wild and captive-reared greater amberjack (Seriola dumerili) during the reproductive cycle (April - July), reporting on the expression and release of the two gonadotropins for the first time in the Mediterranean Sea. Ovaries from wild females were characterized histologically as DEVELOPING in early May and SPAWNING capable in late May-July, the latter having a 3 to 4-fold higher gonadosomatic index (GSI). SPAWNING capable wild females exhibited an increase in pituitary follicle stimulating hormone (Fsh) content, plasma testosterone (T) and 17,20β-dihydroxy-4-pregnen-3-one (17,20β-P), while almost a 10-fold increase was observed in pituitary luteinizing hormone (Lh) content. An increasing trend of plasma 17β-estradiol (E2) was also recorded between the two reproductive stages in wild females. Captive-reared females sampled during the reproductive cycle exhibited two additional reproductive categories, with REGRESSED females having extensive follicular atresia and fish in the REGENERATING stage having only primary oocytes in their ovaries. Pituitary content of Fsh and Lh, fshb and lhb expression and plasma levels of Fsh and Lh remained unchanged among the four reproductive stages in captive females, in contrast with plasma E2 and T that decreased in the REGENERATING stage, and 17,20β-P which increased after the DEVELOPING stage. In general, no significant hormonal differences were recorded between captive-reared and wild DEVELOPING females, in contrast to SPAWNING capable females, where pituitary Lh content, plasma Fsh and T were found to be lower in females in captivity. Overall, the captive females lagged behind in reproductive development compared to the wild ones and this was perhaps related to the multiple handling of the sea cages where all the sampled fish were maintained. Between wild males in the DEVELOPING and SPAWNING capable stages, pituitary Lh content, plasma T and 17,20β-P, and GSI exhibited 3 to 4-fold increases, while an increasing trend of pituitary Fsh content, lhb expression levels and plasma 11-ketotestosterone (11-KT) was also observed, and an opposite trend was observed in plasma Lh. Captive males were allocated to one more category, with REGRESSED individuals having no spermatogenic capacity. During the SPAWNING capable phase, almost all measured parameters were lower in captive males compared to wild ones. More importantly, captive males showed significant differences from their wild counterparts throughout the reproductive season, starting already from the DEVELOPING stage. Therefore, it appears that captivity already exerted negative effects in males prior to the onset of the study and the multiple handling of the cage where sampled fish were reared. Overall, the present study demonstrated that female greater amberjack do undergo full vitellogenesis in captivity, albeit with some dysfunctions that may be related to the husbandry of the experiment, while males, on the other hand, may be more seriously affected by captivity even before the onset of the study.
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Affiliation(s)
- Ioannis Fakriadis
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion, Crete 71003, Greece; University of Crete, Department of Biology, P.O. Box 2208, Heraklion 71409, Crete, Greece.
| | - Iris Meiri-Ashkenazi
- Israel Oceanographic and Limnological Research, National Center for Mariculture, Eilat 88112, Israel
| | - Chen Bracha
- Israel Oceanographic and Limnological Research, National Center for Mariculture, Eilat 88112, Israel
| | - Hanna Rosenfeld
- Israel Oceanographic and Limnological Research, National Center for Mariculture, Eilat 88112, Israel
| | - Aldo Corriero
- Department of Veterinary Medicine, University of Bari Aldo Moro, Valenzano (Bari), Italy
| | - Rosa Zupa
- Department of Veterinary Medicine, University of Bari Aldo Moro, Valenzano (Bari), Italy
| | | | - Maria Papadaki
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion, Crete 71003, Greece
| | - Constantinos C Mylonas
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion, Crete 71003, Greece
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Yeramilli V, Rizek CS, Graham J, Taylor C, Cheddadi R, Patterson S, Watts S, Martin C. Parental preconception stress in zebrafish induces long-lasting anxiety in offspring. Physiol Behav 2024; 277:114477. [PMID: 38301945 DOI: 10.1016/j.physbeh.2024.114477] [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: 12/13/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/03/2024]
Abstract
The growth and function of the vertebrate brain are impacted by environmental stimuli and early life stress. Adults who experience chronic stress during early life are more likely to suffer various neurodevelopmental and health issues. However, our understanding of how these specific environmental signals at different developmental stages affect brain development is poorly understood. In this study, we investigated if stress in parents prior to conception modulates neurodevelopment in offspring. We used a chronic unpredictable stress model adapted to zebrafish, which is an increasingly popular vertebrate model in neuroscience research to investigate the effects of both maternal and paternal preconception stress on offspring behavior. We evaluated the responsiveness of three anxiety-related behavioral paradigms in zebrafish: the novel tank test, thigmotaxis, and shoaling behavior. We found larvae from stressed females exhibited anxiety-like behavior in a thigmotaxis assay. As these larvae matured into adults, they continued to exhibit anxiety-like behavior in a novel tank and shoaling behavioral assay. These studies indicate preconception stress exposure in parents can induce life-long alterations in offspring neurodevelopment. Further, these results expand the hypothesis that chronically elevated glucocorticoid signaling not only in stressed mothers, but also stressed dads can affect neurodevelopment in offspring. We propose that zebrafish may be a useful model to study the transgenerational effects of chronic stress mediated via the maternal and paternal line.
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Affiliation(s)
- Venkata Yeramilli
- Dept of Surgery, Washington University School of Medicine, Saint Louis, MO, US
| | | | - Jessica Graham
- Dept of Surgery, Washington University School of Medicine, Saint Louis, MO, US
| | - Christopher Taylor
- Dept of Biology, University of Alabama at Birmingham, Birmingham, AL, US
| | - Riadh Cheddadi
- Dept of Surgery, Washington University School of Medicine, Saint Louis, MO, US
| | - Sophie Patterson
- Dept of Biology, University of Alabama at Birmingham, Birmingham, AL, US
| | - Stephen Watts
- Dept of Biology, University of Alabama at Birmingham, Birmingham, AL, US
| | - Colin Martin
- Dept of Surgery, Washington University School of Medicine, Saint Louis, MO, US.
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Ciji A, Akhtar MS, Tripathi PH, Dubey MK, Sharma P. Higher intake of β-glucan impairs reproduction in a female teleost, Tor putitora (Hamilton, 1822). FISH PHYSIOLOGY AND BIOCHEMISTRY 2024; 50:589-603. [PMID: 38175337 DOI: 10.1007/s10695-023-01292-4] [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: 05/24/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
Although the immuno-modulatory and stress-relieving properties of β-glucan is well elucidated in humans and other animal models, including fish, its role as a dietary supplement on reproduction is extremely scarce. Therefore, in this study, adult female fish were fed one of four test diets having 0 (control), 0.5, 1, and 1.5% β-D-glucan for 130 days and its effect on reproductive performance, ovarian and liver histology, sex hormones, and transcript abundance of selected reproduction-related genes was assessed. Low dietary intake of β-glucan improved fertilization and hatching rates (p<0.05). The relative fecundity and percentage of spawning females were higher (non-significant) in 0.5% β-glucan-fed groups. Surprisingly, even after 130 days, spawning did not occur in 1.5% β-glucan-fed individuals. Irrespective of β-glucan intake, all the brooders recorded similar plasma 17β-estradiol and maturation-inducing hormone (p>0.05). Higher intake of β-glucan (1.5%) upregulated aromatase genes without a parallel increase in 17β-estradiol. However, plasma vitellogenin increased with increasing β-glucan up to 1.0% then declined at 1.5% (p<0.05). The fish that received control, 0.5, and 1.5% β-glucan recorded similar vitellogenin levels in their plasma. Significantly higher plasma cortisol was evidenced in 1.5% β-glucan fed brooders (p<0.05). Histologically, higher follicular atresia and leaking of yolk material was evidenced in 1.5% β-glucan-fed group. Liver histology revealed the highest nutrient/lipid accumulation in fish that received 1.0% and 1.5% β-glucan. This study demonstrated the stimulatory effect of β-glucan intake at a lower dose (0.5%) on reproduction. However, higher intake (1.5%) could perturb normal reproductive function in a fish model and caused an increased number of atretic follicles leading to spawning/reproductive failure.
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Affiliation(s)
- Alexander Ciji
- ICAR-Directorate of Coldwater Fisheries Research, Anusandhan Bhawan, Bhimtal, Nainital, Uttarakhand, -263136, India
| | - M S Akhtar
- ICAR-Directorate of Coldwater Fisheries Research, Anusandhan Bhawan, Bhimtal, Nainital, Uttarakhand, -263136, India.
| | - Priyanka H Tripathi
- ICAR-Directorate of Coldwater Fisheries Research, Anusandhan Bhawan, Bhimtal, Nainital, Uttarakhand, -263136, India
| | - Maneesh Kumar Dubey
- ICAR-Directorate of Coldwater Fisheries Research, Anusandhan Bhawan, Bhimtal, Nainital, Uttarakhand, -263136, India
| | - Prakash Sharma
- ICAR-Directorate of Coldwater Fisheries Research, Anusandhan Bhawan, Bhimtal, Nainital, Uttarakhand, -263136, India
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9
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Li Y, Tan Z, Zuo P, Li M, Hou L, Wang X. Gestodene causes masculinization of the western mosquitofish (Gambusia affinis): Insights from ovary metabolomics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168693. [PMID: 38008334 DOI: 10.1016/j.scitotenv.2023.168693] [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: 09/22/2023] [Revised: 11/07/2023] [Accepted: 11/17/2023] [Indexed: 11/28/2023]
Abstract
Gestodene (GES) is a common synthetic progesterone frequently detected in aquatic environments. Chronic exposure to GES can cause masculinization of a variety of fish; however, whether metabolism is closely related to the masculinization has yet to be explored. Hence, the ovary metabolome of adult female western mosquitofish (Gambusia affinis) after exposing to GES (0.0, 5.0, 50.0, and 500.0 ng/L) for 40 days was analyzed by using high-performance liquid chromatography ionization with quadrupole time-of-flight tandem mass spectrometry (HPLC-QTOF-MS). The results showed that GES increased the levels of cysteine, taurine, ophthalmic acid and cAMP while decreased methionine, these metabolites changes may owing to the oxidative stress of the ovaries; while taurcholic acid and uric acid were decreased along with induced oocyte apopotosis. Steroids hormone metabolism was also significantly affected, with progesterone and cortisol being the most affected. Enzyme-linked immunoassay results showed that estradiol levels were decreased while testosterone levels were increased with GES exposure. In addition, correlation analysis showed that the differential metabolites of some amino acids (e.g. leucine) were strongly correlated with the levels of steroids hormones secreted by the pituitary gland. The results of this study suggest that GES affects ovarian metabolism via the hypothalamus-pituitary-gonad and hypothalamic-pituitary-adrenal axes, impair antioxidant capacity, induce apoptosis in the ovary of G. affinis, and finally caused masculinization.
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Affiliation(s)
- Yelin Li
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China
| | - Zhiqing Tan
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China; School of Life Sciences, Zhaoqing University, Zhaoqing 526000, China
| | - Peiyu Zuo
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China
| | - Maorong Li
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China
| | - Liping Hou
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
| | - Xiaolan Wang
- School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
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10
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Wolf JC, Green JW, Mingo V, Marini JP, Schneider SZ, Fort DJ, Wheeler JR. Historical control histopathology data from amphibian metamorphosis assays and fathead minnow fish short term reproductive assays: A tool for data interpretation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 267:106811. [PMID: 38159458 DOI: 10.1016/j.aquatox.2023.106811] [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: 09/20/2023] [Revised: 12/17/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
The Amphibian Metamorphosis Assay (AMA) is used to determine if a tested chemical has potential to impact the hypothalamic-pituitary-thyroid (HPT) axis of Xenopus laevis tadpoles, while the Fish Short Term Reproduction Assay (FSTRA) assesses potential effects on the hypothalamic-pituitary-gonadal (HPG) axis of fish such as the fathead minnow (Pimephales promelas). Several global regulatory programs routinely require these internationally validated tests be performed to determine the potential endocrine activity of chemicals. As such, they are conducted in accordance with standardized protocols and test criteria, which were originally developed more than a decade ago. Sizeable numbers of AMA and FSTRA studies have since been carried out, which allows for the mining of extensive historical control data (HCD). Such data are useful for investigating the existence of outlier results and aberrant control groups, identifying potential confounding variables, providing context for rare diagnoses, discriminating target from non-target effects, and for refining current testing paradigms. The present paper provides histopathology HCD from 55 AMA studies and 45 fathead minnow FSTRA studies, so that these data may become publicly available and thus aid in the interpretation of future study outcomes. Histopathology is a key endpoint in these assays, in which it is considered to be one of the most sensitive indicators of endocrine perturbation. In the current review, granular explorations of HCD data were used to identify background lesions, to assess the utility of particular diagnostic findings for distinguishing endocrine from non-endocrine effects, and to help determine if specific improvements to established regulatory guidance may be warranted. Knowledge gleaned from this investigation, supplemented by information from other recent studies, provided further context for the interpretation of AMA and FSTRA histopathology results. We recommend HCDs for the AMA and FSTRA be maintained to support the interpretation of study results.
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Affiliation(s)
- Jeffrey C Wolf
- Experimental Pathology Laboratories, Inc., 45600 Terminal Drive, Sterling, VA 20166, USA.
| | - John W Green
- John W Green Ecostatistical Consulting, LLC 372 Chickory Way, Newark, DE 19711, USA
| | - Valentin Mingo
- Corteva Agriscience, Riedenburger Str. 7, München 81677, Germany
| | | | | | - Douglas J Fort
- Fort Environmental Laboratories, Stillwater, OK 74074, USA
| | - James R Wheeler
- Corteva Agriscience, Zuid-Oostsingel 24D, Bergen op Zoom 4611 BB, the Netherlands
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11
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Dervas E, Cigler P, Hatt JM, Kummrow MS. Morphological evidence for the physiological nature of follicular atresia in veiled chameleons (Chamaeleo calyptratus). Anim Reprod Sci 2024; 261:107409. [PMID: 38215629 DOI: 10.1016/j.anireprosci.2023.107409] [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: 09/04/2023] [Revised: 12/22/2023] [Accepted: 12/28/2023] [Indexed: 01/14/2024]
Abstract
Follicular atresia (FA) has been assumed to serve different functions in reptiles, e.g. helping to develop hierarchies, limiting clutch size, and regression of ovarian structures. Reproductive output is dependent on a balance between ovulations and FA. Excessive rates of FA may not only be detrimental for the survival of a population, but have also been associated with pathological conditions. In order to gain insights into the physiological and potentially pathological processes of FA, we performed a decriptive study on the morphological features of the ovaries in sexually mature female veiled chameleons (Chamaeleo calyptratus, VC). Of 60 clinically healthy female VC with continuous ovarian cycling and at least one confirmed cycle with FA over at least 1.5 years, 30 were selected for macroscopic evaluation of ovarian appearance and 7 were subjected to histology and immunohistology. While FA of previtellogenic follicles happened at a low rate, expected for a species with two germinal beds per ovary and polyautochronic reproductive pattern, atresia in the late vitellogenic stage affected entire generations of follicles, consequential to ovulatory failure. Histologically, no pathological processes were identified in any of the animals. Rather, three stages of FA (early, middle, late) were defined and vitellogenic follicles showed two distinct morphological types of FA: yolky and cystic. Yolky FA was found in 21/30 (70%) animals, while cystic FA co-occurred in 9/30 (30%) of the animals.
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Affiliation(s)
- Eva Dervas
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 268, 8057 Zurich, Switzerland.
| | - Pia Cigler
- Clinic for Zoo Animals, Exotic Pets and Wildlife, University of Zurich, 8057 Zurich, Switzerland
| | - Jean-Michel Hatt
- Clinic for Zoo Animals, Exotic Pets and Wildlife, University of Zurich, 8057 Zurich, Switzerland
| | - Maya S Kummrow
- Clinic for Zoo Animals, Exotic Pets and Wildlife, University of Zurich, 8057 Zurich, Switzerland
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12
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Lancerotto S, Fakriadis I, Papadaki M, Mandalakis M, Sigelaki I, Mylonas CC. Timing of puberty in F1-generation hatchery-produced greater amberjack (Seriola dumerili). Gen Comp Endocrinol 2024; 347:114414. [PMID: 38008343 DOI: 10.1016/j.ygcen.2023.114414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/11/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
We evaluated the onset of puberty of first-generation (F1) hatchery-produced greater amberjack (Seriola dumerili) reared in sea cages for 5 years. Fish were sampled every year in June, at the expected peak of the spawning period in the Mediterranean Sea. No sexual dimorphism in body weight was observed in the study. The ovaries of 1 and 2-year-old (yo) females consisted of primary oocytes only, while at the age of 3-yo early vitellogenic (Vg) oocytes were also identified, but with extensive follicular atresia. At the age of 4-yo, late Vg oocytes were observed, but again extensive follicular atresia characterized the ovaries of 50 % of females. At the age of 5-yo, follicular atresia of Vg oocytes was very limited. In males, gametogenesis was evident already in 1- and 2-yo fish, and 100 % of sampled 3-yo males produced collectable viable sperm. Plasma testosterone (T), 17β-estradiol (E2), and 17,20β-dihydroxy-4-pregnen-3-one (17,20β-P) remained similar in 3 - 5-yo females, with T and E2 levels being highest in females in advanced vitellogenesis or with significant follicular atresia, compared to immature females. In males, plasma T declined over the years, while 11-ketotestosterone (11-KT) and 17,20β-P were highest in 4 and 5-yo males, with spermatozoa motility characteristics being improved from the 4th year onwards. The administration of GnRHa implants to 5-yo fish induced only two spawns, albeit no fertilized eggs were obtained. The results indicate that hatchery-produced greater amberjack males mature well and within the same age observed in the wild, however with smaller gonad size. On the contrary, females mature later than in the wild, also with a smaller gonad size. Spawning in response to GnRHa treatment was not effective, suggesting that Mediterranean hatchery-produced broodstocks may be dysfunctional, and further research is needed to document any improvement as the fish get older, or to determine if the results may be related to the specific stock of fish.
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Affiliation(s)
- Stefano Lancerotto
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece; Biology Department, University of Crete, PO Box 2208, 71409 Heraklion, Crete, Greece
| | - Ioannis Fakriadis
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece
| | - Maria Papadaki
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece
| | - Manolis Mandalakis
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece
| | - Irini Sigelaki
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece
| | - Constantinos C Mylonas
- Institute of Marine Biology, Biotechnology, and Aquaculture, Hellenic Centre for Marine Research, P.O. Box 2214, Heraklion 71003 Crete, Greece.
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13
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Mukherjee U, Das S, Ghosh S, Maitra S. Reproductive toxicity of bisphenol A, at environmentally relevant concentrations, on ovarian redox balance, maturational response, and intra-oocyte signalling events in Labeo bata. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167415. [PMID: 37777122 DOI: 10.1016/j.scitotenv.2023.167415] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 09/04/2023] [Accepted: 09/25/2023] [Indexed: 10/02/2023]
Abstract
Bisphenol A (BPA) is a widely used plastic monomer that potentially interferes with ovarian neuroendocrine, endocrine, and autocrine/paracrine factors, causing reproductive dysfunction. However, the influence of BPA on redox balance, estrogen receptor (ER) expression vis-à-vis meiotic cell cycle progression, and intra-oocyte signalling events has not been extensively investigated. The present study examines the impact of BPA on reproductive toxicity in female Labeo bata (Order Cypriniformes, Family Cyprinidae), a freshwater teleost preferred as a food fish in the Indian subcontinent. Our results show that while ovarian weight (gonadosomatic index, GSI) and dynamics of follicular growth undergo pronounced changes during the annual reproductive cycle, chronic BPA exposure at environmentally relevant concentrations promotes follicular atresia concomitant with reduced GSI during the spawning phase, the highest response being observed due to low-dose (0.1 μg/L, 0.438 nM) BPA exposure in vivo. Furthermore, BPA perturbation of ovarian StAR expression and ERα/ERβ homeostasis corroborates with elevated oxidative stress in BPA-treated ovary, FG follicles, and follicular cells. A sharp increase in ROS accumulation and nitric oxide (NO) levels in BPA-treated full-grown (FG) follicles coupled with loss of redox balance, elevated follicular cell death, and activation of apoptotic markers (caspase -8, -9, -3, Bax) indicate poor oocyte health and reproductive toxicity. Importantly, maturational steroid (MIS, 17,20β-P)-induced cyclin B-p34cdc2 activation and elevated GVBD (germinal vesicle breakdown) response require protein kinase A (PKA) inhibition and participation of Mos/MAPK- and cdc25-mediated signalling events. While the adenylate cyclase activator forskolin (FK) abrogates, priming with a PKA inhibitor (H89) promotes the meiotic G2-M1 transition, confirming the role of PKA in meiotic cell cycle progression in this species. Furthermore, the negative influence of BPA priming on 17,20β-P-induced oocyte maturation involves elevated PKAc phosphorylation (activation) and significant alteration in Mos/MAPK signalling, indicating derailed meiotic maturational competence and disrupted oocyte quality.
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Affiliation(s)
- Urmi Mukherjee
- Molecular and Cellular Endocrinology Laboratory, Department of Zoology, Visva-Bharati University, Santiniketan 731235, India
| | - Sriparna Das
- Molecular and Cellular Endocrinology Laboratory, Department of Zoology, Visva-Bharati University, Santiniketan 731235, India
| | - Soumyajyoti Ghosh
- Molecular and Cellular Endocrinology Laboratory, Department of Zoology, Visva-Bharati University, Santiniketan 731235, India
| | - Sudipta Maitra
- Molecular and Cellular Endocrinology Laboratory, Department of Zoology, Visva-Bharati University, Santiniketan 731235, India.
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14
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Zhao C, Wang S, Liu Y, Chu P, Han B, Ning X, Wang T, Yin S. Acute cold stress leads to zebrafish ovarian dysfunction by regulating miRNA and mRNA. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2023; 48:101139. [PMID: 37683358 DOI: 10.1016/j.cbd.2023.101139] [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: 07/24/2023] [Revised: 08/18/2023] [Accepted: 09/01/2023] [Indexed: 09/10/2023]
Abstract
Temperature is a critical factor that regulates the reproduction processes in teleost. However, the gonadal response mechanism to cold stress in fish remains largely unknown. In the present study, female zebrafish were exposed to different extents of low temperatures at 18 °C and 10 °C for 48 h. The ovarian histology was remarkably damaged after cold stress exposure. Integrated analysis of miRNA-mRNA was used to investigate the ovarian response to acute cold stress. A large number of mRNAs and miRNAs were altered by cold stress, which are involved in extensive biological processes. It is indicated that the signal transduction of MAPK and Calcium signaling pathway is highly engaged in zebrafish ovary to adapt to cold stress. The immune system was dysregulated by cold stress while the ovarian autophagy was activated. Remarkably increased gene number related to reproductive functions was identified in the cold stress at 10 °C compared to the control. The cold stress-induced dysregulated reproductive genes include star, hsd3b1, hsd17b1, inha, insl3, amh, nanos1 and foxl2. Combined with the dysregulated insulin, IGF and progesterone signaling, it is suggested that cold stress affects ovarian function in multiple aspects, including oocyte meiosis, folliculogenesis, final maturation and ovarian maintenance. On the other hand, the ovarian miRNA-mRNA regulatory network response to cold stress was also constructed. Overall, our result revealed the ovarian response to cold stress in zebrafish and provided insight into the fish adaptation mechanism to acute temperature change.
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Affiliation(s)
- Cheng Zhao
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China; Co-Innovation Center for Marine Bio-Industry Technology, Lian Yungang, China
| | - Sijin Wang
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China
| | - Yuxi Liu
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China
| | - Peng Chu
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China
| | - Bing Han
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China
| | - Xianhui Ning
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China; Co-Innovation Center for Marine Bio-Industry Technology, Lian Yungang, China
| | - Tao Wang
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China; Co-Innovation Center for Marine Bio-Industry Technology, Lian Yungang, China.
| | - Shaowu Yin
- College of Life Science, College of Marine Science and Engineering, Jiangsu Province Engineering Research Center for Aquatic Animals Breeding and Green Efficient Aquacultural Technology, Nanjing Normal University, Nanjing, China; Co-Innovation Center for Marine Bio-Industry Technology, Lian Yungang, China.
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15
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Mohamedien D, Mokhtar DM, Abdellah N, Awad M, Albano M, Sayed RKA. Ovary of Zebrafish during Spawning Season: Ultrastructure and Immunohistochemical Profiles of Sox9 and Myostatin. Animals (Basel) 2023; 13:3362. [PMID: 37958117 PMCID: PMC10649070 DOI: 10.3390/ani13213362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
This study sought to examine the ovarian cellular and stromal components of the zebrafish (Danio rerio) throughout the spawning season using light and electron microscopic tools. The ovaries of zebrafish showed oocytes in all stages of follicular development and degeneration (atresia). Six stages of oogenesis were demonstrated: oogonia, early oocytes, late oocytes, vacuolated follicles, the yolk globule stage (vitellogenesis), and mature follicles. The SOX9 protein was expressed in the ooplasm of the primary and previtellogenic oocytes and the theca cell layer of the mature follicles. Myostatin was expressed in the granulosa and theca cells. Many stem cells in the ovarian stroma expressed myostatin and SOX9. During the spawning season, the EM results indicated that the zona radiata increased in thickness and was crossed perpendicularly by pore canals that contained processes from both oocytes and zona granulosa. The granulosa cells contained many mitochondria, rER, sER, and vesicles. Meanwhile, the thecal layer consisted of fibroblast-like cells. Atretic follicles could be demonstrated that involved both oocytes and their follicular walls. Several types of cells were distinguished in the ovarian stroma, including mast cells, telocytes, lymphocytes, fibroblasts, endocrine cells, macrophages, adipocytes, dendritic cells, and steroidogenic (stromal) cells. The ovary of the zebrafish serves as a model to investigate follicular development.
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Affiliation(s)
- Dalia Mohamedien
- Department of Histology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt; (D.M.); (M.A.)
| | - Doaa M. Mokhtar
- Department of Cell and Tissues, Faculty of Veterinary Medicine, Assiut University, Assiut 71526, Egypt;
- Department of Histology and Anatomy, School of Veterinary Medicine, Badr University in Assiut, New Nasser City, Assiut 11829, Egypt
| | - Nada Abdellah
- Department of Histology, Faculty of Veterinary Medicine, Sohag University, Sohag 82524, Egypt;
| | - Mahmoud Awad
- Department of Histology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt; (D.M.); (M.A.)
| | - Marco Albano
- Department of Veterinary Sciences, University of Messina, Polo Universitario Dell’Annunziata, 98168 Messina, Italy
| | - Ramy K. A. Sayed
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Sohag 82524, Egypt;
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16
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Lahimer M, Djekkoun N, Tricotteaux-Zarqaoui S, Corona A, Lafosse I, Ali HB, Ajina M, Bach V, Benkhalifa M, Khorsi-Cauet H. Impact of Perinatal Coexposure to Chlorpyrifos and a High-Fat Diet on Kisspeptin and GnRHR Presence and Reproductive Organs. TOXICS 2023; 11:789. [PMID: 37755799 PMCID: PMC10534599 DOI: 10.3390/toxics11090789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023]
Abstract
Emerging evidence has indicated the involvement of extrahypothalamic Kisspeptin and GnRHR in reproductive function. In this study, we evaluate if maternal exposure to the pesticide chlorpyrifos (CPF) and/or a high-fat diet (HFD) has an impact on the expression of Kisspeptin and GnRHR in the reproductive organs of rats' offspring. A total of 16 pregnant rats are divided into four groups: a control group (n = 4), CPF group (4 rats exposed daily to 1/mg/kg/day), HFD group (4 rats randomly fed a 5.25 kcal/g HFD), and coexposed group (4 rats exposed to CPF and HDF). At postnatal development postnatal day (PND) 60, male and female offspring were sacrificed. The reproductive organs (ovary and testis) were removed, and histological and immunohistological analysis and in silico quantification (TissueGnostics software 6.0.1.102, TissueFAXS, HistoQuest) were applied to investigate the impact of different treatments on Kisspeptin and GnRHR expression in reproductive organs. The main outcomes of the study showed a significant decrease in rat offspring's body weight in the CPF group from PND30 and PND60 (p < 0.05 and p < 0.01, respectively). Histological analysis showed a significant increase in the atretic follicle and abnormal testis structure with germ cell desquamation in the CPF-exposed group. The immunodetection quantification of protein shows a significant decrease in GnRHR and Kisspeptin in the HFD and CPF exposed groups, respectively, in testis rat offspring. Perinatal exposure to CPF and HFD exposure affect the reproduction function of rat offspring.
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Affiliation(s)
- Marwa Lahimer
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
- ART and Reproductive Biology Laboratory, University Hospital and School of Medicine, CHU Sud, 80025 Amiens, France
- Exercise Physiology and Physiopathology: From Integrated to Molecular “Biology, Medicine and 9 Health” (Code: LR19ES09), Sousse 4002, Tunisia;
| | - Narimane Djekkoun
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Sophian Tricotteaux-Zarqaoui
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Aurélie Corona
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Isabelle Lafosse
- MP3CV—UPJV—UR 7517, Jules Verne University of Picardie, 80025 Amiens, France;
| | - Habib Ben Ali
- Laboratory Histology Embryology, Faculty of Medicine Sousse, University of Sousse, Sousse 4000, Tunisia;
| | - Mounir Ajina
- Exercise Physiology and Physiopathology: From Integrated to Molecular “Biology, Medicine and 9 Health” (Code: LR19ES09), Sousse 4002, Tunisia;
- Service of Reproductive Medicine, University Hospital Farhat Hached, Sousse 4000, Tunisia
| | - Véronique Bach
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
| | - Moncef Benkhalifa
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
- ART and Reproductive Biology Laboratory, University Hospital and School of Medicine, CHU Sud, 80025 Amiens, France
| | - Hafida Khorsi-Cauet
- PERITOX-(UMR-I 01), UPJV/INERIS, UPJV, CURS, Chemin du Thil, 80025 Amiens, France; (M.L.); (N.D.); (S.T.-Z.); (A.C.); (V.B.); (M.B.)
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17
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Converse A, Genuise H, Bennett TL, Butler RM, Thomas P. The membrane androgen receptor ZIP9 (SCL39A9) maintains ovarian homeostasis by mediating post-ovulatory follicle breakdown in zebrafish. Gen Comp Endocrinol 2023; 340:114323. [PMID: 37247826 DOI: 10.1016/j.ygcen.2023.114323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/23/2023] [Accepted: 05/26/2023] [Indexed: 05/31/2023]
Abstract
ZIP9 was recently characterized as a membrane androgen receptor in Atlantic croaker granulosa/theca (G/T) cells where it mediates androgen-induced apoptosis in vitro, but the physiological significance of this action has remained unclear. In the current study, we utilized ZIP9 knockout (zip9-/-) zebrafish to investigate the role of ZIP9-mediated androgen-induced G/T cell apoptosis in vivo. We first confirmed ZIP9 mediates apoptosis of zebrafish G/T cells in vitro. Testosterone increased apoptosis, intracellular free zinc, and expression of pro-apoptotic members bax and p53 in wildtype and zip9+/+ zebrafish G/T cells, but not in ZIP9 knockout and knockdown cell models. We hypothesized ZIP9-mediated G/T cell apoptosis may be involved in post-ovulatory follicle (POF) breakdown in vivo. Post ovulation, zip9, bax, and p53 were upregulated in zip9+/+ but not in zip9-/- ovaries. Immunoreactivity of cleaved caspase 3 was also higher in POFs from zip9+/+ ovaries compared to zip9-/-, and POF breakdown was significantly delayed in zip9-/- fish compared to zip9+/+ counterparts. To determine the detrimental consequences of delayed POF breakdown in the zip9-/- model, fish were challenged with repeated ovulation induction. After the challenge, zip9-/- fish exhibited abnormal ovarian lesions that contained debris consistent with atretic or necrotic cellular material. However, no abnormalities were observed in zip9+/+ fish ovaries, indicating that the abnormal phenotype is due to the loss of ZIP9. This study demonstrates an important role for ZIP9 in mediating POF breakdown and maintaining tissue remodeling and homeostasis in the teleost ovary and indicates a role for the ZIP9-mediated androgen-induced apoptotic response in vivo.
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Affiliation(s)
- Aubrey Converse
- Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, USA.
| | - Heather Genuise
- Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, USA
| | - Teresa L Bennett
- Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, USA
| | - Rebecca M Butler
- Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, USA
| | - Peter Thomas
- Marine Science Institute, The University of Texas at Austin, Port Aransas, TX, USA
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18
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Kondakova EA, Bogdanova VA, Ottesen O, Alexandrov AA. The development of the digestive system and the fate of the yolk syncytial layer in postembryogenesis of Stenodus leucichthys nelma (Teleostei). J Morphol 2023; 284:e21604. [PMID: 37313770 DOI: 10.1002/jmor.21604] [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: 12/21/2022] [Revised: 05/13/2023] [Accepted: 05/19/2023] [Indexed: 06/15/2023]
Abstract
Stenodus leucichthys nelma is an economically important species for cold-water aquaculture. Unlike other Coregoninae, S. leucichthys nelma is a piscivore. Here, we describe in detail the development of the digestive system and the yolk syncytial layer from hatching to early juvenile stage using histological and histochemical methods to determine their common and specific characteristics and to test the hypothesis that the digestive system of S. leucichthys nelma rapidly acquires adult features. The digestive tract differentiates at hatching and starts to function before the transition to mixed feeding. The mouth and anus are open, mucous cells and taste buds are present in the buccopharyngeal cavity and esophagus, pharyngeal teeth have erupted, the stomach primordium is seen, the intestinal epithelium with mucous cells is folded and the intestinal valve is observed; the epithelial cells of the postvalvular intestine contain supranuclear vacuoles. The liver blood vessels are filled with blood. The cells of exocrine pancreas are loaded with zymogen granules, and at least two islets of Langerhans are present. However, the larvae remain dependent on maternal yolk and lipids for a long time. The adult features of the digestive system develop gradually, the most significant changes take place approximately from 31 to 42 days posthatching. Then, the gastric glands and pyloric caeca buds appear, the U-shaped stomach with glandular and aglandular regions develops, the swim bladder inflates, the number of islets of Langerhans increases, the pancreas becomes scattered, and the yolk syncytial layer undergoes programmed death during the larval-to-juvenile transition. During postembryonic development, the mucous cells of the digestive system contain neutral mucosubstances.
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Affiliation(s)
- Ekaterina A Kondakova
- Saint Petersburg State University, Saint Petersburg, Russia
- Saint Petersburg Branch of the FSBSI «VNIRO» («GosNIORKH» named after L.S. Berg), Saint Petersburg, Russia
| | - Vera A Bogdanova
- Saint Petersburg Branch of the FSBSI «VNIRO» («GosNIORKH» named after L.S. Berg), Saint Petersburg, Russia
| | - Oddvar Ottesen
- Faculty of Bioscience and Aquaculture, Nord University, Bodø, Norway
- Akvatik AS, Bodø, Norway
| | - Alexey A Alexandrov
- Saint Petersburg Branch of the FSBSI «VNIRO» («GosNIORKH» named after L.S. Berg), Saint Petersburg, Russia
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19
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Monell KJ, Roncalli V, Hopcroft RR, Hartline DK, Lenz PH. Post-Diapause DNA Replication during Oogenesis in a Capital-Breeding Copepod. Integr Org Biol 2023; 5:obad020. [PMID: 37361914 PMCID: PMC10290532 DOI: 10.1093/iob/obad020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/11/2023] [Indexed: 06/28/2023] Open
Abstract
In high-latitude environments where seasonal changes include periods of harsh conditions, many arthropods enter diapause, a period of dormancy that is hormonally regulated. Diapause is characterized by very low metabolism, resistance to environmental stress, and developmental arrest. It allows an organism to optimize the timing of reproduction by synchronizing offspring growth and development with periods of high food availability. In species that enter dormancy as pre-adults or adults, termination of diapause is marked by the resumption of physiological processes, an increase in metabolic rates and once transitioned into adulthood for females, the initiation of oogenesis. In many cases, individuals start feeding again and newly acquired resources become available to fuel egg production. However, in the subarctic capital-breeding copepod Neocalanus flemingeri, feeding is decoupled from oogenesis. Thus, optimizing reproduction limited by fixed resources such that all eggs are of high quality and fully-provisioned, requires regulation of the number of oocytes. However, it is unknown if and how this copepod limits oocyte formation. In this study, the phase in oocyte production by post-diapause females that involved DNA replication in the ovary and oviducts was examined using incubation in 5-Ethynyl-2'-deoxyuridine (EdU). Both oogonia and oocytes incorporated EdU, with the number of EdU-labeled cells peaking at 72 hours following diapause termination. Cell labeling with EdU remained high for two weeks, decreasing thereafter with no labeling detected by four weeks post diapause, and three to four weeks before spawning of the first clutch of eggs. The results suggest that oogenesis is sequential in N. flemingeri with formation of new oocytes starting within 24 hours of diapause termination and limited to the first few weeks. Lipid consumption during diapause was minimal and relatively modest initially. This early phase in the reproductive program precedes mid-oogenesis and vitellogenesis 2, when oocytes increase in size and accumulate yolk and lipid reserves. By limiting DNA replication to the initial phase, the females effectively separate oocyte production from oocyte provisioning. A sequential oogenesis is unlike the income-breeder strategy of most copepods in which oocytes at all stages of maturation are found concurrently in the reproductive structures.
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Affiliation(s)
| | - V Roncalli
- Stazione Zoologica Anton Dohrn, Integrative Marine Ecology, Campania 80121, Napoli, Italy
| | - R R Hopcroft
- Department of Oceanography, University of Alaska, Institute of Marine Science, Fairbanks, Alaska 99775-7220, USA
| | - D K Hartline
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu 96822, USA
| | - P H Lenz
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu 96822, USA
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20
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Tam N, Kong RYC, Lai KP. Reproductive toxicity in marine medaka (Oryzias melastigma) due to embryonic exposure to PCB 28 or 4'-OH-PCB 65. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162401. [PMID: 36842578 DOI: 10.1016/j.scitotenv.2023.162401] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/15/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Previous studies have shown that juvenile or adult exposure to polychlorinated biphenyls (PCBs) induces alterations in reproductive functions (e.g., reduced fertilization rate) and behavior (e.g., reduced nest maintenance) in fish. Embryonic exposures to other endocrine disrupting chemicals have been reported to induce long-term reproductive toxicity in fish. However, the effects of embryonic exposure to PCBs or their metabolites, OH-PCBs, on long-term reproductive function in fish are unknown. In the present study, we used the marine medaka fish (Oryzias melastigma) as a model to assess the reproductive endpoints in response to embryonic exposure to either PCB 28 or 4'-OH-PCB 65. Our results showed that the sex ratio of marine medaka was feminized by exposure to 4'-OH-PCB 65. Fecundity was decreased in the medaka treated with either PCB 28 or 4'-OH-PCB 65, whereas the medaka from embryonic exposure to 4'-OH-PCB 65 additionally exhibited reduced fertilization and a reduction in the hatching success rate of offspring, as well as decreased sperm motility. Serum 11-KT concentrations were reduced in the PCB 28-treated medaka, and serum estradiol (E2)/testosterone (T) and E2/11-ketotestosterone (11-KT) ratios were decreased in the 4'-OH-PCB 65-treated medaka. To explain these observations at the molecular level, transcriptomic analysis of the gonads was performed. Bioinformatic analysis using Gene Ontology and Ingenuity Pathway Analysis revealed that genes involved in various pathways potentially involved in reproductive functions (e.g., steroid metabolism and cholesterol homeostasis) were differentially expressed in the testes and ovaries of either PCB- or OH-PCB-treated medaka. Thus, the long-term reproductive toxicity in fish due to embryonic exposure to PCB or OH-PCB should be considered for environmental risk assessment.
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Affiliation(s)
- Nathan Tam
- Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong
| | - Richard Yuen Chong Kong
- Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong.
| | - Keng Po Lai
- Key Laboratory of Environmental Pollution and Integrative Omics, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, China; Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong.
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21
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Zhao L, Xiong C, Yang Y, Li Z, He K, Liu Q, He Z, Luo J, Zhang X, Li Z, Yang S. The protective effect of resveratrol on largemouth bass (Micropterus salmoides) during out-of-season spawning. FISH & SHELLFISH IMMUNOLOGY 2023; 136:108688. [PMID: 36935043 DOI: 10.1016/j.fsi.2023.108688] [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: 01/20/2023] [Revised: 03/05/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
In aquaculture production, out-of-season spawning is beneficial to solve the seasonal shortage of fry that are normally produced once annually by species such as largemouth bass (Micropterus salmoides), thereby implementing year-round fry production. Maintaining low temperature over a period of several months can delay largemouth bass ovarian development, but it can cause severe stress to their reproductive function, leading to decreased fertility during out-of-season spawning. Feeding with antioxidants is one of the most effective methods to alleviate the negative effects of low temperature stress. Therefore, the purpose of this study is to: (a) evaluate the changes in oocyte morphology, antioxidant capacity, reproductive hormone-related index, cell apoptosis and autophagy during the out-of-season spawning of largemouth bass, and (b) to investigate the protective effect of the antioxidant resveratrol on this fish during out-of-season spawning from May through August. The study was divided into two groups (three replicates per group, 2000 fish per replicate): control group (Control) (exposure to water temperature of 12-17 °C) and resveratrol supplementation group (Res) (exposure to water temperature of 12-17 °C and fed with 200 mg/kg resveratrol). The results show that: (1) The serum hormones LH and E2 increased first and then remained unchanged, and the ovarian section showed that the ovary remained in stage IV. (2) In the process of off-season reproduction, a large number of follicles experienced follicular atresia, accompanied by endoplasmic reticulum expansion, nuclear chromatin condensation and mitochondrial swelling, which was relieved after feeding resveratrol. (3) Resveratrol decreased the ovarian ROS content and improved the activities of CAT and other antioxidant enzymes in the ovary and liver to some extent. (4) Resveratrol reduced the level of pro-apoptotic (Bax, Caspase3, Caspase8, Caspase9) and autophagy-related components (LC3-B, Beclin-1) while increasing the transcription level of anti-apoptotic (Bcl-2) factors. These findings suggest that resveratrol alleviates some adverse effects of largemouth bass during out-of-season spawning to some extent and provide a model for efficient and high-quality out-of-season spawning.
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Affiliation(s)
- Liulan Zhao
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Chen Xiong
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Yi Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Zhihong Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Kuo He
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Qiao Liu
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Zhi He
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Jie Luo
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Xin Zhang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Zhiqiong Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Song Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
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22
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Nzioka A, Valencia A, Atxaerandio-Landa A, Diaz de Cerio O, Hossain MA, Korta M, Ortiz-Zarragoitia M, Cancio I. Apoptosis and autophagy-related gene transcription during ovarian follicular atresia in European hake (Merluccius merluccius). MARINE ENVIRONMENTAL RESEARCH 2023; 183:105846. [PMID: 36521304 DOI: 10.1016/j.marenvres.2022.105846] [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: 05/13/2022] [Revised: 11/30/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Follicular atresia is an energy-saving oocyte resorption process that can allow the survival of female fish when environmental conditions are unfavourable and at the expense of fecundity. This study investigated the transcription levels of apoptosis and autophagy-related genes during atresia in the European hake that can show episodes of increased follicular atresia throughout the reproductive cycle. 169 female individuals were collected from the Bay of Biscay, and the ovaries were analysed using histological and molecular methods. Different levels of atresia were histologically detected in 73.7% of the ovaries analysed and the TUNEL assay identified apoptotic nuclei in follicles from both previtellogenic and vitellogenic stages. Transcripts of beclin-1 and ptenb were up-regulated in the ovaries containing atretic follicles, whereas p53, caspase-3, cathepsin D and dapk1 were up-regulated only in ovaries presenting vitellogenic atretic follicles. Our results indicate different implications of apoptotic vs autophagic processes leading to atresia during oocyte development, vitellogenesis being the moment of maximal apoptotic and autophagic activity in atretic hakes. The analysed genes could provide early warning biomarkers to identify follicular atresia in fish and evaluate fecundity in fish stocks.
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Affiliation(s)
- Anthony Nzioka
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Ainara Valencia
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Aitor Atxaerandio-Landa
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Oihane Diaz de Cerio
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Mohammad Amzad Hossain
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Maria Korta
- AZTI-Tecnalia, Herrera Kaia, Portualdea z/g, 20110, Pasaia, Basque Country, Spain
| | - Maren Ortiz-Zarragoitia
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain
| | - Ibon Cancio
- CBET Research Group, Dept. Zoology & Animal Cell Biology, Faculty of Science & Technology and Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), University of the Basque Country, Areatza Hiribidea s/n, 48620, Plentzia, Basque Country, Spain.
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23
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Thunell V, Gårdmark A, Huss M, Vindenes Y. Optimal energy allocation trade-off driven by size-dependent physiological and demographic responses to warming. Ecology 2022; 104:e3967. [PMID: 36565169 DOI: 10.1002/ecy.3967] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 10/26/2022] [Accepted: 11/28/2022] [Indexed: 12/25/2022]
Abstract
Body size-dependent physiological effects of temperature influence individual growth, reproduction, and survival, which govern animal population responses to global warming. Considerable knowledge has been established on how such effects can affect population growth and size structure, but less is known of their potential role in temperature-driven adaptation in life-history traits. In this study, we ask how warming affects the optimal allocation of energy between growth and reproduction and disentangle the underlying fitness trade-offs. To this end, we develop a novel dynamic energy budget integral projection model (DEB-IPM), linking individuals' size- and temperature-dependent consumption and maintenance via somatic growth, reproduction, and size-dependent energy allocation to emergent population responses. At the population level, we calculate the long-term population growth rate (fitness) and stable size structure emerging from demographic processes. Applying the model to an example of pike (Esox lucius), we find that optimal energy allocation to growth decreases with warming. Furthermore, we demonstrate how growth, fecundity, and survival contribute to this change in optimal allocation. Higher energy allocation to somatic growth at low temperatures increases fitness through survival of small individuals and through the reproduction of larger individuals. In contrast, at high temperatures, increased allocation to reproduction is favored because warming induces faster somatic growth of small individuals and increased fecundity but reduced growth and higher mortality of larger individuals. Reduced optimum allocation to growth leads to further reductions in body size and an increasingly truncated population size structure with warming. Our study demonstrates how, by incorporating general physiological mechanisms driving the temperature dependence of life-history traits, the DEB-IPM framework is useful for investigating the adaptation of size-structured organisms to warming.
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Affiliation(s)
- Viktor Thunell
- Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Anna Gårdmark
- Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Magnus Huss
- Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Yngvild Vindenes
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, Oslo, Norway
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24
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Adams CM, Winkelman DL, Schaffer PA, Villeneuve DL, Cavallin JE, Ellman M, Rodriguez KS, Fitzpatrick RM. Elevated Winter Stream Temperatures below Wastewater Treatment Plants Shift Reproductive Development of Female Johnny Darter Etheostoma nigrum: A Field and Histologic Approach. FISHES 2022; 7:1-22. [PMID: 36761383 PMCID: PMC9904396 DOI: 10.3390/fishes7060361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
River water temperatures are increasing globally, particularly in urban systems. In winter, wastewater treatment plant (WWTP) effluent inputs are of particular concern because they increase water temperatures from near freezing to ~7-15 °C. Recent laboratory studies suggest that warm overwinter temperatures impact the reproductive timing of some fishes. To evaluate winter water temperature's influence in the wild, we sampled Johnny Darter Etheostoma nigrum from three urban South Platte River tributaries in Colorado upstream and downstream of WWTP effluent discharge sites. Fish were collected weekly during the spring spawning season of 2021 and reproductive development was determined from histological analysis of the gonads. Winter water temperatures were approximately 5-10 °C greater ~300 m downstream of the WWTP effluent compared to upstream sites, and approximately 3°C warmer at sampling sites ~5000 m downstream of the effluent discharge. Females collected downstream of WWTP effluent experienced accelerated reproductive development compared to upstream by 1-2 weeks. Water quality, including total estrogenicity, and spring water temperatures did not appear to explain varying reproductive development. It appears that small increases in winter water temperature influence the reproductive timing in E. nigrum. Further investigations into how shifts in reproductive timing influence other population dynamics are warranted.
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Affiliation(s)
- Catherine M. Adams
- Colorado Cooperative Fish and Wildlife Research Unit, Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO 80523, USA
| | - Dana L. Winkelman
- U.S. Geological Survey, Colorado Cooperative Fish and Wildlife Research Unit, Colorado State University, Fort Collins, CO 80523, USA
| | - Paula A. Schaffer
- CVMBS Microbiology, Immunology & Pathology Department, Veterinary Diagnostic Laboratory, Colorado State University, Fort Collins, CO 80523, USA
| | - Daniel L. Villeneuve
- Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Duluth, MN 55804, USA
| | - Jenna E. Cavallin
- Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Duluth, MN 55804, USA
| | - Michael Ellman
- Oak Ridge Institute for Science and Education, Environmental Protection Agency, Duluth, MN 55804, USA
| | - Kelvin Santana Rodriguez
- Oak Ridge Institute for Science and Education, Environmental Protection Agency, Duluth, MN 55804, USA
| | - Ryan M. Fitzpatrick
- Colorado Parks and Wildlife, Research, Policy, and Planning Section, Fort Collins, CO 80526, USA
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25
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Heppell SS, Wyneken J, Heppell SA. A morphologist, a modeler, and an endocrinologist consider sea turtle sex ratios in a changing climate. Some wine was involved. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.952432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Because the sex of sea turtles is determined by temperature during embryonic development, many populations are vulnerable to increased bias in primary sex ratios as global temperatures rise. Higher temperatures produce more females, and some populations are already showing years with all-female offspring production. But because sea turtles take decades to mature and have long adult lifespans, these primary sex ratio biases can take years to impact adult sex ratios, and the males from cohorts that are produced during cooler years may compensate for the sex ratio bias if they can breed more frequently and with multiple females. To date, little is known about male sea turtle reproductive behavior, making predictions of sex ratio skew impacts highly speculative. We used data from southern Florida loggerhead sea turtle nests to parameterize a simple population model to explore the effects of an increase in the proportion of female hatchlings over time on population trends, effective population size (Ne), and quasi-extinction probability. We also tested the effects of increasing the frequency of relatively high male production years to simulate potential mitigation strategies. While heuristic rather than predictive, our results expectedly show a rise in nest counts due to the increase in females over time, followed by population decline as males become limiting. Population collapse due to increased female bias will take many decades to occur, but sex ratio skew can have large impacts on Ne, and thus increase the potential for inbreeding. An increase in the frequency of male production years, even just one additional “good male year” per decade, can help mitigate these outcomes if the rate of feminization is not too rapid. Male breeding frequency and mating success are critical drivers of the results and must be prioritized for research.
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