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He Y, Yu T, Li H, Sun Q, Chen M, Lin Y, Dai J, Wang W, Li Q, Ju S. Polystyrene nanoplastic exposure actives ferroptosis by oxidative stress-induced lipid peroxidation in porcine oocytes during maturation. J Anim Sci Biotechnol 2024; 15:117. [PMID: 39223579 PMCID: PMC11370062 DOI: 10.1186/s40104-024-01077-6] [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: 04/20/2024] [Accepted: 07/14/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Polystyrene nanoplastics (PS-NPs) are becoming increasingly prevalent in the environment with great advancements in plastic products, and their potential health hazard to animals has received much attention. Several studies have reported the toxicity of PS-NPs to various tissues and cells; however, there is a paucity of information about whether PS-NPs exposure can have toxic effects on mammalian oocytes, especially livestock. Herein, porcine oocytes were used as the model to investigate the potential effects of PS-NPs on mammalian oocytes. RESULTS The findings showed that different concentrations of PS-NPs (0, 25, 50 and 100 μg/mL) entering into porcine oocytes could induce mitochondrial stress, including a significant decrease in mitochondrial membrane potential (MMP), and the destruction of the balance of mitochondrial dynamic and micromorphology. Furthermore, there was a marked increase in reactive oxygen species (ROS), which led to oocyte lipid peroxidation (LPO). PS-NPs exposure induced abnormal intracellular iron overload, and subsequently increased the expression of transferrin receptor (TfRC), solute carrier family 7 member 11 (SLC7a11), and acyl-CoA synthetase long-chain family member 4 (ACSL4), which resulted in ferroptosis in oocytes. PS-NPs also induced oocyte maturation failure, cytoskeletal dysfunction and DNA damage. Cotreatment with 5 μmol/L ferrostatin-1 (Fer-1, an inhibitor of ferroptosis) alleviated the cellular toxicity associated with PS-NPs exposure during porcine oocyte maturation. CONCLUSIONS In conclusion, PS-NPs caused ferroptosis in porcine oocytes by increasing oxidative stress and altering lipid metabolism, leading to the failure of oocyte maturation.
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Affiliation(s)
- Yijing He
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Tianhang Yu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Heran Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Livestock and Poultry Resources (Pig) Evaluation and Utilization, Ministry of Agriculture and Rural Affairs, Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Qinfeng Sun
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Miaoyu Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yiyi Lin
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jianjun Dai
- Key Laboratory of Livestock and Poultry Resources (Pig) Evaluation and Utilization, Ministry of Agriculture and Rural Affairs, Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Weihan Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qiao Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shiqiang Ju
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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2
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Zhang H, Su W, Zhao R, Li M, Zhao S, Chen Z, Zhao H. Epigallocatechin-3-gallate improves the quality of maternally aged oocytes. Cell Prolif 2024; 57:e13575. [PMID: 38010042 PMCID: PMC10984106 DOI: 10.1111/cpr.13575] [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: 09/20/2023] [Revised: 10/15/2023] [Accepted: 10/31/2023] [Indexed: 11/29/2023] Open
Abstract
The decline in female fertility as age advances is intricately linked to the diminished developmental potential of oocytes. Despite this challenge, the strategies available to enhance the quality of aged oocytes remain limited. Epigallocatechin-3-gallate (EGCG), characterised by its anti-inflammatory, antioxidant and tissue protective properties, holds promise as a candidate for improving the quality of maternally aged oocytes. In this study, we explored the precise impact and underlying mechanisms of EGCG on aged oocytes. EGCG exhibited the capacity to enhance the quality of aged oocytes both in vitro and in vivo. Specifically, the application of EGCG in vitro resulted in noteworthy improvements, including an increased rate of first polar body extrusion, enhanced mitochondrial function, refined spindle morphology and a reduction in oxidative stress. These beneficial effects were further validated by the improved fertility observed among aged mice. In addition, our findings propose that EGCG might augment the expression of Arf6. This augmentation, in turn, contributes to the assembly of spindle-associated F-actin, which can contribute to mitigate the aneuploidy induced by the disruption of spindle F-actin within aged oocytes. This work thus contributes not only to understanding the role of EGCG in bolstering oocyte health, but also underscores its potential as a therapeutic intervention to address fertility challenges associated with advanced age.
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Affiliation(s)
- HongHui Zhang
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu SchoolNanjing Medical UniversityNanjingChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Wei Su
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - RuSong Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu SchoolNanjing Medical UniversityNanjingChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Mei Li
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - ShiGang Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Zi‐Jiang Chen
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive GeneticsShanghaiChina
- Center for Reproductive Medicine, Ren Ji Hospital, School of MedicineShanghai Jiao Tong UniversityShanghaiChina
| | - Han Zhao
- State Key Laboratory of Reproductive Medicine and Offspring HealthShandong UniversityJinanChina
- Key Laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanChina
- National Research Center for Assisted Reproductive Technology and Reproductive GeneticShandong UniversityJinanChina
- Research Unit of Gametogenesis and Health of ART‐Offspring, Chinese Academy of Medical Sciences (No.2021RU001)JinanChina
- Shandong Key Laboratory of Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
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3
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Simerly C, Robertson E, Harrison C, Ward S, George C, Deleon J, Hartnett C, Schatten G. Male meiotic spindle poles are stabilized by TACC3 and cKAP5/chTOG differently from female meiotic or somatic mitotic spindles in mice. Sci Rep 2024; 14:4808. [PMID: 38413710 PMCID: PMC10899211 DOI: 10.1038/s41598-024-55376-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 02/22/2024] [Indexed: 02/29/2024] Open
Abstract
Transforming acidic acid coiled-coil protein 3 (TACC3) and cytoskeleton associated protein 5 (cKAP5; or colonic hepatic tumor overexpressed gene, chTOG) are vital for spindle assembly and stabilization initiated through TACC3 Aurora-A kinase interaction. Here, TACC3 and cKAP5/chTOG localization with monospecific antibodies is investigated in eGFP-centrin-2- expressing mouse meiotic spermatocytes. Both proteins bind spermatocyte spindle poles but neither kinetochore nor interpolar microtubules, unlike in mitotic mouse fibroblasts or female meiotic oocyte spindles. Spermatocytes do not display a liquid-like spindle domain (LISD), although fusing them into maturing oocytes generates LISD-like TACC3 condensates around sperm chromatin but sparse microtubule assembly. Microtubule inhibitors do not reduce TACC3 and cKAP5/chTOG spindle pole binding. MLN 8237 Aurora-A kinase inhibitor removes TACC3, not cKAP5/chTOG, disrupting spindle organization, chromosome alignment, and impacting spindle pole γ-tubulin intensity. The LISD disruptor 1,6-hexanediol abolished TACC3 in spermatocytes, impacting spindle bipolarity and chromosome organization. Cold microtubule disassembly and rescue experiments in the presence of 1,6-hexanediol reinforce the concept that spermatocyte TACC3 spindle pole presence is not required for spindle pole microtubule assembly. Collectively, meiotic spermatocytes without a LISD localize TACC3 and cKAP5/chTOG exclusively at spindle poles to support meiotic spindle pole stabilization during male meiosis, different from either female meiosis or mitosis.
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Affiliation(s)
- Calvin Simerly
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Emily Robertson
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Caleb Harrison
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Sydney Ward
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Charlize George
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Jasmine Deleon
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Carrie Hartnett
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA
| | - Gerald Schatten
- Departments of Cell Biology, Ob-Gyn-Repro Sci, and Bioengineering, Pittsburgh Development Center of Magee-Womens Research Institute, University of Pittsburgh Medical Center, 204 Craft Avenue, Pittsburgh, PA, 15213, USA.
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4
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Sananmuang T, Puthier D, Nguyen C, Chokeshaiusaha K. Differential transcript usage across mammalian oocytes at the germinal vesicle and metaphase II stages. Theriogenology 2024; 215:1-9. [PMID: 37995439 DOI: 10.1016/j.theriogenology.2023.11.016] [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: 08/22/2023] [Revised: 11/11/2023] [Accepted: 11/13/2023] [Indexed: 11/25/2023]
Abstract
Ongoing progress in mRNA-Sequencing technologies has significantly contributed to the refinement of assisted reproductive technologies. However, the prior investigations have predominantly concentrated on alterations in overall gene expression levels, thereby leaving a considerable gap in our understanding of the influence of transcript isoform expression on fundamental cellular mechanisms of oocytes. Given the efficacy of differential transcript usage (DTU) analysis to address such knowledge, we conducted comprehensive DTU analysis utilizing mRNA-Seq datasets of germinal vesicle (GV) and metaphase II (MII) oocytes across six mammalian species from the SRA database, including cow, donkey, horse, human, mouse, and pig. To further illuminate the roles of these genes, we also conducted a rigorous Gene Ontology (GO) term enrichment analysis. While the DTU analysis of each species exhibited several genes with alterations in their transcript isoform usage, referred to as DTU genes, this study focused on only ten cross-species DTU genes sharing among a minimum of five distinct species (FDR≤0.05). These cross-species DTU genes were as follows: ABCF1, CDC6, CFAP36, CNOT10, DNM3, IWS1, NBN, NDEL1, RAD50 and ZCCHC17. GO term enrichment analysis unveiled the alignment of these cross-species DTU gene functions with RNA and cell-cycle control mechanisms across diverse mammalian species, thereby suggesting their vital roles during oocyte maturation. Further exploration of the transcript isoforms of these genes hence bore the potential to uncover novel transcript isoform markers for future reproductive technologies in both human and animal contexts.
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Affiliation(s)
- Thanida Sananmuang
- Rajamangala University of Technology Tawan-OK, Faculty of Veterinary Medicine, Chonburi, Thailand
| | - Denis Puthier
- Aix-Marseille Université, INSERM UMR 1090, TAGC, Marseille, France
| | - Catherine Nguyen
- Aix-Marseille Université, INSERM UMR 1090, TAGC, Marseille, France
| | - Kaj Chokeshaiusaha
- Rajamangala University of Technology Tawan-OK, Faculty of Veterinary Medicine, Chonburi, Thailand.
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5
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Jung GI, Londoño-Vásquez D, Park S, Skop AR, Balboula AZ, Schindler K. An oocyte meiotic midbody cap is required for developmental competence in mice. Nat Commun 2023; 14:7419. [PMID: 37973997 PMCID: PMC10654508 DOI: 10.1038/s41467-023-43288-x] [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: 07/25/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023] Open
Abstract
Embryo development depends upon maternally derived materials. Mammalian oocytes undergo extreme asymmetric cytokinesis events, producing one large egg and two small polar bodies. During cytokinesis in somatic cells, the midbody and subsequent assembly of the midbody remnant, a signaling organelle containing RNAs, transcription factors and translation machinery, is thought to influence cellular function or fate. The role of the midbody and midbody remnant in gametes, in particular, oocytes, remains unclear. Here, we examined the formation and function of meiotic midbodies (mMB) and mMB remnants using mouse oocytes and demonstrate that mMBs have a specialized cap structure that is orientated toward polar bodies. We show that that mMBs are translationally active, and that mMB caps are required to retain nascent proteins in eggs. We propose that this specialized mMB cap maintains genetic factors in eggs allowing for full developmental competency.
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Affiliation(s)
- Gyu Ik Jung
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Human Genetics Institute of New Jersey, Piscataway, NJ, USA
| | | | - Sungjin Park
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, USA
| | - Ahna R Skop
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, USA
| | - Ahmed Z Balboula
- Animal Sciences Research Center, University of Missouri, Columbia, MO, USA
| | - Karen Schindler
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
- Human Genetics Institute of New Jersey, Piscataway, NJ, USA.
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6
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Totsuka T, Akera T, Olson MF. MRCK ensures cortex-chromatin "social distancing" to enable egg spindle rotation. J Cell Biol 2023; 222:e202310009. [PMID: 37843812 PMCID: PMC10579697 DOI: 10.1083/jcb.202310009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023] Open
Abstract
During the second meiotic cell division, egg cells discard one set of chromatids to the polar body to produce a large haploid gamete. Meiotic spindle rotation is a critical step to ensure proper polar body extrusion. In this issue, Bourdais et al. (2023. J. Cell Biol.https://doi.org/10.1083/jcb.202211029) have identified MRCKβ as an essential kinase for efficient spindle rotation. MRCK activates cortical myosin II rings overlying the spindle to prevent the notoriously sticky interaction between the cell cortex and chromatin to facilitate spindle rotation. Furthermore, Bourdais et al. found that the same MRCK-myosin II pathway also operates in zygotes to promote parental genome unification.
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Affiliation(s)
- Takaya Totsuka
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Takashi Akera
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Michael F. Olson
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Canada
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7
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Schindler K, Jung GI, Londoño-Vásquez D, Park S, Skop A, Balboula A. An oocyte meiotic midbody cap is required for developmental competence in mice. RESEARCH SQUARE 2023:rs.3.rs-3399188. [PMID: 37886573 PMCID: PMC10602078 DOI: 10.21203/rs.3.rs-3399188/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Embryo development depends upon maternally derived materials. Mammalian oocytes undergo extreme asymmetric cytokinesis events, producing one large egg and two small polar bodies (PB). During cytokinesis in somatic cells, the midbody (MB) and subsequent assembly of the midbody remnant (MBR), a signaling organelle containing RNAs, transcription factors and translation machinery, is thought to influence cellular function or fate. The role of the MB and MBR in gametes, in particular, oocytes, remains unclear. Here, we examined the formation and function of meiotic MBs (mMB) and mMB remnants (mMBRs) using mouse oocytes and demonstrate that mMBs have a specialized meiotic mMB cap structure that is orientated toward PBs. We show that that mMBs are translationally active, and that mMB caps are required to retain nascent proteins in eggs. We propose that this specialized mMB cap maintains genetic factors in eggs allowing for full developmental competency.
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8
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Kincade JN, Hlavacek A, Akera T, Balboula AZ. Initial spindle positioning at the oocyte center protects against incorrect kinetochore-microtubule attachment and aneuploidy in mice. SCIENCE ADVANCES 2023; 9:eadd7397. [PMID: 36800430 PMCID: PMC9937575 DOI: 10.1126/sciadv.add7397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Spindle positioning within the oocyte must be tightly regulated. In mice, the spindle is predominantly assembled at the oocyte center before its migration toward the cortex to achieve the highly asymmetric division, a characteristic of female meiosis. The significance of the initial central positioning of the spindle is largely unknown. We show that initial spindle positioning at the oocyte center is an insurance mechanism to avoid the premature exposure of the spindle to cortical CDC42 signaling, which perturbs proper kinetochore-microtubule attachments, leading to the formation of aneuploid gametes. These findings contribute to understanding why female gametes are notoriously associated with high rates of aneuploidy, the leading genetic cause of miscarriage and congenital abnormalities.
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Affiliation(s)
- Jessica N. Kincade
- Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Avery Hlavacek
- Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Takashi Akera
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ahmed Z. Balboula
- Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
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9
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Feng J, Soto‐Moreno EJ, Prakash A, Balboula AZ, Qiao H. Adverse PFAS effects on mouse oocyte in vitro maturation are associated with carbon-chain length and inclusion of a sulfonate group. Cell Prolif 2023; 56:e13353. [PMID: 36305033 PMCID: PMC9890540 DOI: 10.1111/cpr.13353] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/04/2022] [Accepted: 10/09/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES Per- and polyfluoroalkyl substances (PFAS) are man-made chemicals that are widely used in various products. PFAS are characterized by their fluorinated carbon chains that make them hard to degrade and bioaccumulate in human and animals. Toxicological studies have shown PFAS toxic effects: cytotoxicity, immunotoxicity, neurotoxicity, and reproductive toxicity. However, it is still unclear how the structures of PFAS, such as carbon-chain length and functional groups, determine their reproductive toxicity. METHODS AND RESULTS By using a mouse-oocyte-in-vitro-maturation (IVM) system, we found the toxicity of two major categories of PFAS, perfluoroalkyl carboxylic acid (PFCA) and perfluoroalkyl sulfonic acid (PFSA), is elevated with increasing carbon-chain length and the inclusion of the sulfonate group. Specifically, at 600 μM, perfluorohexanesulfonic acid (PFHxS) and perfluorooctanesulfonic acid (PFOS) reduced the rates of both germinal-vesicle breakdown (GVBD) and polar-body extrusion (PBE) as well as enlarged polar bodies. However, the shorter PFSA, perfluorobutanesulfonic acid (PFBS), and all PFCA did not show similar adverse cytotoxicity. Further, we found that 600 μM PFHxS and PFOS exposure induced excess reactive oxygen species (ROS) and decreased mitochondrial membrane potential (MMP). Cytoskeleton analysis revealed that PFHxS and PFOS exposure induced chromosome misalignment, abnormal F-actin organization, elongated spindle formation, and symmetric division in the treated oocytes. These meiotic defects compromised oocyte developmental competence after parthenogenetic activation. CONCLUSIONS Our study provides new information on the structure-toxicity relationship of PFAS.
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Affiliation(s)
- Jianan Feng
- Department of Comparative BiosciencesUniversity of Illinois at Urbana‐ChampaignChampaignUrbanaUSA
| | | | - Aashna Prakash
- Department of Comparative BiosciencesUniversity of Illinois at Urbana‐ChampaignChampaignUrbanaUSA
| | - Ahmed Z. Balboula
- Division of Animal SciencesUniversity of MissouriMissouriColumbiaUSA
| | - Huanyu Qiao
- Department of Comparative BiosciencesUniversity of Illinois at Urbana‐ChampaignChampaignUrbanaUSA
- Carl R. Woese Institute for Genomic BiologyUniversity of Illinois at Urbana‐ChampaignChampaignUrbanaUSA
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10
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Gao W, Zhang C, Li B, Oh JS. Azoxystrobin exposure impairs meiotic maturation by disturbing spindle formation in mouse oocytes. Front Cell Dev Biol 2022; 10:1053654. [PMID: 36531942 PMCID: PMC9755494 DOI: 10.3389/fcell.2022.1053654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022] Open
Abstract
Fungicides are a type of pesticide used to protect plants and crops from pathogenic fungi. Azoxystrobin (AZO), a natural methoxyacrylate derived from strobilurin, is one of the most widely used fungicides in agriculture. AZO exerts its fungicidal activity by inhibiting mitochondrial respiration, but its cytotoxicity to mammalian oocytes has not been studied. In this study, we investigated the effect of AZO exposure on mouse oocyte maturation to elucidate the underlying mechanisms of its possible reproductive toxicity. We found that AZO exposure disturbed meiotic maturation by impairing spindle formation and chromosome alignment, which was associated with decreased microtubule organizing center (MTOC) integrity. Moreover, AZO exposure induced abnormal mitochondrial distribution and increased oxidative stress. The AZO-induced toxicity to oocytes was relieved by melatonin supplementation during meiotic maturation. Therefore, our results suggest that AZO exposure impairs oocyte maturation not only by increasing oxidative stress and mitochondrial dysfunction, but also by decreasing MTOC integrity and subsequent spindle formation and chromosome alignment.
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Affiliation(s)
- Wen Gao
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Chen Zhang
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
- RNA Medicine Center, International Institutes of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Bichun Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jeong Su Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, South Korea
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, South Korea
- *Correspondence: Jeong Su Oh,
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11
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Londoño-Vásquez D, Jurkevich A, Balboula AZ. Multi-Photon Laser Ablation of Cytoplasmic Microtubule Organizing Centers in Mouse Oocytes. J Vis Exp 2022:10.3791/64439. [PMID: 36440837 PMCID: PMC10364971 DOI: 10.3791/64439] [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] [Indexed: 07/26/2023] Open
Abstract
The fidelity of oocyte meiosis is critical for generating developmentally competent euploid eggs. In mammals, the oocyte undergoes a lengthy arrest at prophase I of the first meiotic division. After puberty and upon meiotic resumption, the nuclear membrane disassembles (nuclear envelope breakdown), and the spindle is assembled mainly at the oocyte center. Initial central spindle positioning is essential to protect against abnormal kinetochore-microtubule (MT) attachments and aneuploidy. The centrally positioned spindle migrates in a time-sensitive manner toward the cortex, and this is a necessary process to extrude a tiny polar body. In mitotic cells, spindle positioning relies on the interaction between centrosome-mediated astral MTs and the cell cortex. On the contrary, mouse oocytes lack classic centrosomes and, instead, contain numerous acentriolar MT organizing centers (MTOCs). At the metaphase I stage, mouse oocytes have two different sets of MTOCs: (1) MTOCs that are clustered and sorted to assemble spindle poles (polar MTOCs), and (2) metaphase cytoplasmic MTOCs (mcMTOCs) that remain in the cytoplasm and do not contribute directly to spindle formation but play a crucial role in regulating spindle positioning and timely spindle migration. Here, a multi-photon laser ablation method is described to selectively deplete endogenously labeled mcMTOCs in oocytes collected from Cep192-eGfp reporter mice. This method contributes to the understanding of the molecular mechanisms underlying spindle positioning and migration in mammalian oocytes.
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Dunkley S, Scheffler K, Mogessie B. Cytoskeletal form and function in mammalian oocytes and zygotes. Curr Opin Cell Biol 2022; 75:102073. [PMID: 35364486 DOI: 10.1016/j.ceb.2022.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/09/2022] [Accepted: 02/17/2022] [Indexed: 11/28/2022]
Abstract
The actin and microtubule cytoskeletons of mammalian oocytes and zygotes exist in distinct forms at various subcellular locations. This enables each cytoskeletal system to perform vastly different functions in time and space within the same cell. In recent years, key discovery enabling tools including light-sensitive microscopy assays have helped to illuminate cytoskeletal form and function in female reproductive cell biology. New findings include unexpected participation of F-actin in oocyte chromosome segregation, oocyte specific modes of spindle self-organization as well as existence of nuclear actin polymers whose functions are only starting to emerge. Functional actin-microtubule interactions have also been identified as an important feature that supports mammalian embryo development. Other advances have revealed reproductive age-related changes in chromosome structure and dynamics that predispose mammalian eggs to aneuploidy.
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Affiliation(s)
- Sam Dunkley
- School of Biochemistry, University of Bristol, BS8 1TD, Bristol, UK
| | | | - Binyam Mogessie
- School of Biochemistry, University of Bristol, BS8 1TD, Bristol, UK; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT, 06511, USA.
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