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Cañón-Beltrán K, García-García RM, Cajas YN, Fierro N, Lorenzo PL, Arias-Álvarez M. Improvement of oocyte competence and in vitro oocyte maturation with EGF and IGF-I in Guinea pig model. Theriogenology 2024; 214:206-214. [PMID: 37907035 DOI: 10.1016/j.theriogenology.2023.10.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/21/2023] [Accepted: 10/23/2023] [Indexed: 11/02/2023]
Abstract
In vitro maturation (IVM) system is an alternative method to superovulation protocols to obtain mature oocytes. Epidermal Growth Factor (EGF) and Insulin-like Growth Factor I (IGF-I) have been widely used in IVM medium in different species. Although the guinea pig is a valuable animal model for reproductive studies, IVM is rarely used. We aimed to establish a suitable in vitro production system using EGF and/or IGF-I during IVM to improve oocyte competence. Firstly, immunolocalization of EGF and IGF-I receptors in the ovary was assessed. An IVM dose-response experiment was performed with cumulus-oocyte complexes (COCs) supplemented with: 1) EGF [0, 10, 50, 100 ng/mL or 10% fetal calf serum (FCS)]; 2) IGF-I [0, 50, 100, 200 ng/mL or 10% FCS]; or 3) the concentrations of EGF and IGF-I which showed the best IVM index in the previous experiments, with or without Fetal Calf Serum (FCS). Cortical granule and mitochondria distribution patterns were determined in in vivo and in vitro-matured oocytes for the first time in this species. Apoptotic rate after IVM and oocyte competence by in vitro embryo development were evaluated. Immunohistochemistry results showed positive immunostaining of EGF and IGF receptors in corpus luteum, oocytes, granulosa and theca cells in follicles in all stages of development. Supplementation of IVM medium with 50 ng/mL EGF or 100 ng/mL IGF-I or their combination with FCS successfully led to oocyte nuclear and cytoplasmic maturation and reduced the apoptotic rate. Both growth factors improved oocyte competence during IVM in this species since early embryos were in vitro developed, showing better results when FCS was used in the IVM medium.
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Affiliation(s)
- Karina Cañón-Beltrán
- Department of Physiology, Veterinary Faculty, Complutense University of Madrid - UCM, 28040, Spain; Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja - UTPL, Loja, 11-01-608, Ecuador.
| | - Rosa M García-García
- Department of Physiology, Veterinary Faculty, Complutense University of Madrid - UCM, 28040, Spain
| | - Yulia N Cajas
- Laboratorio de Biotecnología de la Reproducción Animal, Facultad de Ciencias Agropecuarias, Universidad de Cuenca (UC), Cuenca, EC010205, Ecuador
| | - Natacha Fierro
- Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja - UTPL, Loja, 11-01-608, Ecuador
| | - Pedro L Lorenzo
- Department of Physiology, Veterinary Faculty, Complutense University of Madrid - UCM, 28040, Spain
| | - María Arias-Álvarez
- Department of Animal Production, Veterinary Faculty, Complutense University of Madrid - UCM, 28040, Spain.
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2
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Reproductive cycle and in vitro maturation of canine oocyte: A meta-analysis approach. Theriogenology 2022; 188:22-27. [DOI: 10.1016/j.theriogenology.2022.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 11/19/2022]
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3
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Dell'Aquila ME, Asif S, Temerario L, Mastrorocco A, Marzano G, Martino NA, Lacalandra GM, Roelen BA, Carluccio A, Robbe D, Minervini F. Ochratoxin A affects oocyte maturation and subsequent embryo developmental dynamics in the juvenile sheep model. Mycotoxin Res 2021; 37:23-37. [PMID: 32996062 PMCID: PMC7819917 DOI: 10.1007/s12550-020-00410-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 09/12/2020] [Accepted: 09/18/2020] [Indexed: 11/29/2022]
Abstract
The genotoxic and nephrotoxic mycotoxin Ochratoxin A (OTA) has also been reported to have adverse effects on oocyte maturation and embryo development. Previous studies on the effects of OTA on female fertility have used micromolar concentrations, but no information is available to date on effects in a more relevant nanomolar range. This study used a juvenile sheep model to evaluate the effects of oocyte exposure to low levels of OTA on maturation, fertilization, and embryo development. Further, it was investigated whether different mechanisms of action of OTA could be responsible for varying toxic effects at different levels of exposure. Cumulus-oocyte-complexes (COCs) were exposed to 10 μmol/L-0.1 nmol/L OTA during in vitro maturation and evaluated for cumulus viability, oocyte maturation, and bioenergetic/oxidative status. COCs were subjected to in vitro fertilization, embryo culture, and embryo quality assessment via morphology, viability, bioenergetic/oxidative status, and time-lapse monitoring. At micromolar concentrations, OTA induced cytotoxic effects, by reducing cumulus expansion and oocyte maturation. OTA altered temporospatial dynamics of zygote pronuclear formation and embryo morphokinetics. Blastocysts, even morphologically normal, were found to undergo collapse events, which were probably related to boosted blastocyst mitochondrial activity. At nanomolar concentrations, OTA did not affect COC morpho-functional parameters, but impaired oocyte ability to prevent polyspermy and increased blastocyst apoptosis. In conclusion, in the female germ cell, cytotoxic nonspecific effects characterize OTA-induced toxicity at high exposure levels, whereas fine tuning-mode effects, not associated with altered cell viability and integrity, characterize OTA toxic action at low levels.
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Affiliation(s)
- Maria Elena Dell'Aquila
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
| | - Shafaq Asif
- Faculty of Veterinary Medicine, University of Teramo, SP18, 64100, Teramo, Italy
| | - Letizia Temerario
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy
| | - Antonella Mastrorocco
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy
- Faculty of Veterinary Medicine, University of Teramo, SP18, 64100, Teramo, Italy
| | - Giuseppina Marzano
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy
- Department of Mathematics and Physics E. de Giorgi, University of Salento, Via per Arnesano, 73100, Lecce, Italy
| | - Nicola Antonio Martino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy
- Department of Veterinary Sciences, University of Torino, Largo Braccini 2, 10095, Grugliasco, Torino, Italy
| | - Giovanni Michele Lacalandra
- Department of Veterinary Medicine, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy
| | - Bernard Aj Roelen
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands
| | - Augusto Carluccio
- Faculty of Veterinary Medicine, University of Teramo, SP18, 64100, Teramo, Italy
| | - Domenico Robbe
- Faculty of Veterinary Medicine, University of Teramo, SP18, 64100, Teramo, Italy
| | - Fiorenza Minervini
- Institute of Sciences of Food Production (ISPA), National Research Council of Italy (CNR), Via G. Amendola 122/O, 70125, Bari, (BA), Italy
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4
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Gao Z, Yao G, Zhang H, Liu H, Yang Z, Liu C, Li W, Zhao X, Wei Q, Ma B. Resveratrol protects the mitochondria from vitrification injury in mouse 2-cell embryos. Cryobiology 2020; 95:123-129. [PMID: 32464144 DOI: 10.1016/j.cryobiol.2020.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/14/2020] [Accepted: 05/14/2020] [Indexed: 02/02/2023]
Abstract
Mitochondria play a key role in embryo development by providing energy. However, vitrification often causes mitochondrion damage of embryo, which further impairs embryo development. Therefore, the efficiency of embryo development after vitrification could be improved by protecting mitochondrial function from vitrification injury. The purpose of this study was to investigate the effects of resveratrol on mitochondrial damage after vitrification. The results showed that vitrification induced the abnormal mitochondrial distribution and damage mitochondrial function of mouse 2-cell embryos. However, co-culturing with resveratrol for 2 h could repair the abnormal mitochondrial distribution and mitochondrial dysfunction of embryos after vitrification. More than anything, the subsequent development ability of vitrified-thawed 2-cell embryos was significantly higher than that with no resveratrol treatment. In conclusion, resveratrol could protect the mitochondrial from injury caused by vitrification.
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Affiliation(s)
- Zhen Gao
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Ge Yao
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Hui Zhang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Haokun Liu
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Zhenshan Yang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Chen Liu
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Wei Li
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Xiaoe Zhao
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Qiang Wei
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China.
| | - Baohua Ma
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China.
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5
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Mastrorocco A, Martino NA, Marzano G, Lacalandra GM, Ciani E, Roelen BAJ, Dell'Aquila ME, Minervini F. The mycotoxin beauvericin induces oocyte mitochondrial dysfunction and affects embryo development in the juvenile sheep. Mol Reprod Dev 2019; 86:1430-1443. [PMID: 31410935 DOI: 10.1002/mrd.23256] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/29/2019] [Indexed: 12/31/2022]
Abstract
Beauvericin (BEA) is a mycotoxin produced by Beauveria bassiana and Fusarium species recently reported as toxic on porcine oocyte maturation and embryo development. The aim of this study was to assess, in the juvenile sheep, whether its effects are due to alterations of oocyte and/or embryo bioenergetic/oxidative status. Cumulus-oocyte-complexes (COCs) were exposed to BEA during in vitro maturation (IVM), evaluated for cumulus cell (CC) apoptosis, oocyte maturation and bioenergetic/oxidative status or subjected to in vitro fertilization (IVF) and embryo culture (IVEC). Oocyte nuclear maturation and embryo development were assessed after Hoechst staining and CC apoptosis was analysed by terminal deoxynucleotidyl transferase-mediated dUTP nick-End labeling assay and chromatin morphology after Hoechst staining by epifluorescence microscopy. Oocyte and blastocyst bioenergetic/oxidative status were assessed by confocal microscopy after mitochondria and reactive oxygen species labelling with specific probes. BEA showed various toxic effects, that is, short-term effects on somatic and germinal compartment of the COC (CCs and the oocyte) and long-term carry-over effects on developing embryos. In detail, at 5 µM, it significantly reduced oocyte maturation and immature oocytes showed increased late-stage (Type C) CC apoptosis and DNA fragmentation while matured oocytes showed unaffected CC viability but abnormal mitochondrial distribution patterns. At lower tested concentrations (3-0.5 µM), BEA did not affect oocyte maturation, but matured oocytes showed reduced mitochondrial activity. At low concentrations, BEA impaired embryo developmental capacity and blastocyst quality after IVF and IVEC. In conclusion, in the juvenile sheep, COC exposure to BEA induces CC apoptosis and oocyte mitochondrial dysfunction with negative impact on embryo development.
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Affiliation(s)
- Antonella Mastrorocco
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Nicola Antonio Martino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Giuseppina Marzano
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | | | - Elena Ciani
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Bernard A J Roelen
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Maria Elena Dell'Aquila
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Fiorenza Minervini
- Institute of Sciences of Food Production (ISPA), National Research Council of Italy (CNR), Bari, Italy
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6
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Marzano G, Mastrorocco A, Zianni R, Mangiacotti M, Chiaravalle AE, Lacalandra GM, Minervini F, Cardinali A, Macciocca M, Vicenti R, Fabbri R, Hinrichs K, Dell'Aquila ME, Martino NA. Altered morphokinetics in equine embryos from oocytes exposed to DEHP during IVM. Mol Reprod Dev 2019; 86:1388-1404. [PMID: 31025442 DOI: 10.1002/mrd.23156] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/12/2019] [Accepted: 04/04/2019] [Indexed: 02/01/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) is a commonly used plasticizer with endocrine-disrupting properties. In this study, we used an equine model to investigate DEHP concentrations in ovarian follicular fluid (FF), and to determine the effects of exposure of oocytes to potentially toxic concentrations of DEHP during in vitro maturation (IVM) on embryo development and quality. Embryo development was evaluated using time-lapse monitoring (TLM), a photomicroscopic tool that reveals abnormalities in cleavage kinetics unobservable by conventional morphology assessment. Blastocyst bioenergetic/oxidative status was assessed by confocal analysis. The possibility that verbascoside (VB), a bioactive polyphenol with antioxidant activity, could counteract DEHP-induced oocyte oxidative damage, was investigated. DEHP was detected in FF and in IVM media at concentrations up to 60 nM. Culture of oocytes in the presence of 500 nM DEHP delayed second polar body extrusion, reduced duration of the second cell cycle, and increased the percentage of embryos showing abrupt multiple cleavage, compared with controls. Mitochondrial activity and intracellular levels of reactive oxygen species were reduced in blastocysts from DEHP-exposed oocytes. VB addition during IVM limited DEHP-induced blastocyst damage. In conclusion, DEHP is detectable in equine FF and culture medium, and oocyte exposure to increased concentrations of DEHP during IVM affects preimplantation embryo development. Moreover, TLM, reported for the first time in the horse in this study, is an efficient tool for identifying altered morphokinetic parameters and cleavage abnormalities associated with exposure to toxic compounds.
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Affiliation(s)
- Giuseppina Marzano
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Antonella Mastrorocco
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Rosalia Zianni
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Foggia, Italy
| | | | | | | | - Fiorenza Minervini
- Institute of Sciences of Food Production (ISPA), National Research Council of Italy (CNR), Bari, Italy
| | - Angela Cardinali
- Institute of Sciences of Food Production (ISPA), National Research Council of Italy (CNR), Bari, Italy
| | - Maria Macciocca
- Department of Medical and Surgical Sciences, Gynecology and Physiopathology of Human Reproductive Unit, Sant'Orsola-Malpighi Hospital, University of Bologna,, Bologna, Italy
| | - Rossella Vicenti
- Department of Medical and Surgical Sciences, Gynecology and Physiopathology of Human Reproductive Unit, Sant'Orsola-Malpighi Hospital, University of Bologna,, Bologna, Italy
| | - Raffaella Fabbri
- Department of Medical and Surgical Sciences, Gynecology and Physiopathology of Human Reproductive Unit, Sant'Orsola-Malpighi Hospital, University of Bologna,, Bologna, Italy
| | - Katrin Hinrichs
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine & Biomedical Science, Texas A&M University, College Station, TX
| | - Maria E Dell'Aquila
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Nicola A Martino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Valenzano, Bari, Italy.,Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Foggia, Italy.,Department of Veterinary Science, University of Turin, Grugliasco, Italy
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7
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Piras AR, Menéndez-Blanco I, Soto-Heras S, Catalá MG, Izquierdo D, Bogliolo L, Paramio MT. Resveratrol supplementation during in vitro maturation improves embryo development of prepubertal goat oocytes selected by brilliant cresyl blue staining. J Reprod Dev 2018; 65:113-120. [PMID: 30606957 PMCID: PMC6473110 DOI: 10.1262/jrd.2018-077] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
This study aimed to investigate the effect of resveratrol supplementation in maturation medium on the developmental ability and bioenergetic\oxidative status of prepubertal goat oocytes selected by brilliant cresyl blue (BCB). Oocytes collected from slaughterhouse-derived ovaries were selected by 13 µM BCB staining and classified as grown BCB+ and growing BCB- oocytes. All oocytes were matured in vitro in our conventional maturation medium and supplemented with 1 µM (BCB+R and BCB-R) and without (Control groups: BCB+C and BCB-C) resveratrol. After 24 h, IVM-oocytes were fertilized with fresh semen and presumptive zygotes were in vitro cultured for 8 days. Oocytes were assessed for blastocyst development and quality, mitochondrial activity and distribution, and levels of GSH, ROS, and ATP. BCB+R (28.3%) oocytes matured with resveratrol presented significantly higher blastocyst development than BCB+C (13.0%) and BCB- groups (BCB-R: 8.3% and BCB-C: 4.7%). Resveratrol improved blastocyst development of BCB-R oocytes at the same rate as BCB+C oocytes. No differences were observed in blastocyst quality among groups. GSH levels were significantly higher in resveratrol groups (BCB+R: 36554.6; BCB-R: 34946.7 pixels/oocyte) than in control groups (BCB+C: 27624.0; BCB-C: 27655.4 pixels/oocyte). No differences were found in mitochondrial activity, ROS level, and ATP content among the groups. Resveratrol-treated oocytes had a higher proportion of clustered active mitochondria in both BCB groups (BCB+R: 73.07%; BCB-R: 79.16%) than control groups (BCB+C: 19.35%; BCB-C: 40%). In conclusion, resveratrol increased blastocyst production from oocytes of prepubertal goats, particularly in better quality oocytes (BCB+).
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Affiliation(s)
- Anna-Rita Piras
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain.,Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, 07100 Sassari, Italy
| | - Irene Menéndez-Blanco
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain
| | - Sandra Soto-Heras
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain
| | - Maria-Gracia Catalá
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain
| | - Dolors Izquierdo
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain
| | - Luisa Bogliolo
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, 07100 Sassari, Italy
| | - Maria-Teresa Paramio
- Universitat Autònoma de Barcelona, Departament de Ciència Animal i dels Aliments, 08193 Bellaterra, Barcelona, Spain
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Cao X, Li J, Xue H, Wang S, Zhao W, Du Z, Yang Y, Yue Z. Effect of vitrification on meiotic maturation, mitochondrial distribution and glutathione synthesis in immature silver fox cumulus oocyte complexes. Theriogenology 2017; 91:104-111. [DOI: 10.1016/j.theriogenology.2016.12.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 12/22/2016] [Accepted: 12/29/2016] [Indexed: 10/20/2022]
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9
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Martino NA, Marzano G, Mangiacotti M, Miedico O, Sardanelli AM, Gnoni A, Lacalandra GM, Chiaravalle AE, Ciani E, Bogliolo L, Minervini F, Pizzi F, Dell'Aquila ME. Exposure to cadmium during in vitro maturation at environmental nanomolar levels impairs oocyte fertilization through oxidative damage: A large animal model study. Reprod Toxicol 2017; 69:132-145. [PMID: 28188904 DOI: 10.1016/j.reprotox.2017.02.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 01/19/2017] [Accepted: 02/06/2017] [Indexed: 12/12/2022]
Abstract
Cadmium is a highly toxic heavy metal with negative effects on oocyte fertilization. The aim of this study was to analyse whether cadmium-induced impairment of fertilization is caused by mitochondria dysfunction and oxidative stress in the cumulus-oocyte complex (COC). Preliminarily, 19 trace element levels were measured in ovaries from juvenile and adult ewes and age-related cadmium ovarian bioaccumulation at nanomolar concentrations was found. COCs from juvenile and adult ewes, exposed during in vitro maturation to 1nM or 100nM CdCl2, and subjected to in vitro fertilization showed significantly lower fertilization rates in exposed COCs compared with controls. In vitro matured exposed and control COCs underwent confocal microscopy analysis of mitochondria activity and reactive oxygen species (ROS) levels and lipid peroxidation (LPO) assay at cumulus cell and oocyte level. In both age groups, cadmium at nanomolar concentrations induced cumulus-oocyte mitochondria over-activity and oxidative damage which were related to impaired oocyte fertilization.
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Affiliation(s)
- N A Martino
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Via Manfredonia 20, 71121 Foggia, Italy; Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
| | - G Marzano
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
| | - M Mangiacotti
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Via Manfredonia 20, 71121 Foggia, Italy.
| | - O Miedico
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Via Manfredonia 20, 71121 Foggia, Italy.
| | - A M Sardanelli
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, P.zza G. Cesare, 11 70124 Bari, Italy; Institute of Translational Pharmacology (IFT), National Research Council of Italy (CNR), via del Fosso del Cavaliere 100, 00133 Rome, Italy.
| | - A Gnoni
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, P.zza G. Cesare, 11 70124 Bari, Italy.
| | - G M Lacalandra
- Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
| | - A E Chiaravalle
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Via Manfredonia 20, 71121 Foggia, Italy.
| | - E Ciani
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
| | - L Bogliolo
- Obstetrics and Gynaecology Section, Department of Veterinary Medicine, Via Vienna, n°2 07100 Sassari, Italy.
| | - F Minervini
- Istituto di Scienze delle Produzioni Alimentari (ISPA), National Research Council of Italy (CNR), Via G. Amendola 122/O, 70125 Bari (BA), Italy.
| | - F Pizzi
- Istituto di Biologia e Biotecnologia Agraria (IBBA), National Research Council of Italy (CNR), Sede di Lodi-Via A. Einstein, 26500 Lodi, Italy.
| | - M E Dell'Aquila
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Str. Prov. Casamassima Km 3, 70010, Valenzano, Bari, Italy.
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10
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Ariu F, Strina A, Murrone O, Falchi L, Bebbere D, Ledda S, Zedda MT, Pau S, Bogliolo L. Lipid droplet distribution of immature canine oocytes in relation to their size and the reproductive stage. Anim Sci J 2015; 87:147-50. [PMID: 26419408 DOI: 10.1111/asj.12432] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 03/04/2015] [Accepted: 03/11/2015] [Indexed: 11/29/2022]
Abstract
This study investigated the distribution of lipid droplets (LD) in immature canine oocytes in relation to their size and the reproductive stage. Oocytes were collected from the ovaries of bitches at different estrous stages, divided according to their size (110-120 µm; >120 µm), and stained with Nile Red to detect lipid droplet distribution. At the follicular phase most of the oocytes displayed a diffuse pattern of LD distribution, whereas at anestrus and luteal phase oocytes showed LD mainly in a peripheral/ perinuclear LD distribution. A significantly higher intensity of LD has been recorded in the oocytes > 120 µm compared to those of smaller size (110 - 120 µm) at all stages of the estrous cycle. At follicular phase, oocytes > 120 µm displayed LD intensity similar to that of oocytes > 120 µm at luteal phase and higher compared to the oocytes of the other groups.
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Affiliation(s)
- Federica Ariu
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Alessandro Strina
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Ombretta Murrone
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Laura Falchi
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Daniela Bebbere
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Sergio Ledda
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Maria Teresa Zedda
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Salvatore Pau
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
| | - Luisa Bogliolo
- Department of Veterinary Medicine, Section of Obstetrics and Gynecology, University of Sassari, Sassari, Italy
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Differences in the Kinetic of the First Meiotic Division and in Active Mitochondrial Distribution between Prepubertal and Adult Oocytes Mirror Differences in their Developmental Competence in a Sheep Model. PLoS One 2015; 10:e0124911. [PMID: 25893245 PMCID: PMC4403920 DOI: 10.1371/journal.pone.0124911] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 03/09/2015] [Indexed: 11/19/2022] Open
Abstract
Our aim is to verify if oocyte developmental potential is related to the timing of meiotic progression and to mitochondrial distribution and activity using prepubertal and adult oocytes as models of low and high developmental capacity respectively. Prepubertal and adult oocytes were incorporated in an in vitro maturation system to determine meiotic and developmental competence and to assess at different time points kinetic of meiotic maturation, 2D protein electrophoresis patterns, ATP content and mitochondria distribution. Maturation and fertilization rates did not differ between prepubertal and adult oocytes (95.1% vs 96.7% and 66.73% vs 70.62% respectively for prepubertal and adult oocytes). Compared to adults, prepubertal oocytes showed higher parthenogenesis (17.38% vs 2.08% respectively in prepubertals and adults; P<0.01) and polispermy (14.30% vs 2.21% respectively in prepubertals and adults; P<0.01), lower cleavage rates (60.00% vs 67.08% respectively in prepubertals and adults; P<0.05) and blastocyst output (11.94% vs 34.% respectively in prepubertals and adults; P<0.01). Prepubertal oocytes reached MI stage 1 hr later than adults and this delay grows as the first meiotic division proceeds. Simultaneously, the protein pattern was altered since in prepubertal oocytes it fluctuates, dropping and rising to levels similar to adults only at 24 hrs. In prepubertal oocytes ATP rise is delayed and did not reach levels comparable to adult ones. CLSM observations revealed that at MII, in the majority of prepubertal oocytes, the active mitochondria are homogenously distributed, while in adults they are aggregated in big clusters. Our work demonstrates that mitochondria and their functional aggregation during maturation play an active role to provide energy in terms of ATP. The oocyte ATP content determines the timing of the meiotic cycle and the acquisition of developmental competence. Taken together our data suggest that oocytes with low developmental competence have a slowed down energetic metabolism which delays later development.
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Somoskoi B, Martino NA, Cardone RA, Lacalandra GM, Dell'Aquila ME, Cseh S. Different chromatin and energy/redox responses of mouse morulae and blastocysts to slow freezing and vitrification. Reprod Biol Endocrinol 2015; 13:22. [PMID: 25889099 PMCID: PMC4419566 DOI: 10.1186/s12958-015-0018-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 03/09/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The ability to cryopreserve mammalian embryos has become an integral part of assisted reproduction, both in human and veterinary medicine. Despite differences in the size and physiological characteristics of embryos from various species, the embryos have been frozen by either of two procedures: slow freezing or vitrification. The aim of our study was to compare the effect of slow freezing and vitrification to the chromatin structure, energy status and reactive oxygen species production of mouse morulae and blastocysts. METHODS Mouse morulae and blastocysts were randomly allocated into vitrification, slow freezing and control groups. For slow freezing, Dulbecco phosphate buffered saline based 10% glicerol solution was used. For vitrification, G-MOPS™ based solution supplemented with 16% ethylene glycol, 16% propylene glycol, Ficoll (10 mg/ml) and sucrose (0.65 mol/l) was used. After warming, the chromatin integrity, mitochondrial distribution pattern and energy/oxidative status were compared among groups. RESULTS Cryopreservation affected chromatin integrity at a greater extent at the morula than the blastocyst stage. Chromatin damage induced by slow freezing was more relevant compared to vitrification. Slow freezing and vitrification similarly affected mitochondrial distribution pattern. Greater damage was observed at the morula stage and it was associated with embryo grade. Cryopreservation altered the quantitative bioenergy/redox parameters at a greater extent in the morulae than in the blastocysts. Effects induced by slow freezing were not related to embryo grade or mitochondrial pattern, as affected embryos were of all grades and with both mitochondrial patterns. However, effects induced by vitrification were related to mitochondrial pattern, as only embryos with homogeneous mitochondrial pattern in small aggregates had reduced energy status. CONCLUSIONS This study shows for the first time the joint assessment of chromatin damage and mitochondrial energy/redox potential in fresh and frozen mouse embryos at the morula and blastocyst stage, allowing the comparison of the effects of the two most commonly used cryopreservation procedures.
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Affiliation(s)
- Bence Somoskoi
- Department and Clinic of Obstetrics and Reproduction, Szent Istvan University, Budapest, Hungary.
| | - Nicola A Martino
- Veterinary Clinics and Animal Productions Unit, Department of Emergency and Organ Trasplantation (DETO), University of Bari Aldo Moro Valenzano, Bari, Italy.
| | - Rosa A Cardone
- Department of Bioscience, Biotechnology and Pharmacological Science, University of Bari, 70126, Bari, Italy.
| | - Giovanni M Lacalandra
- Veterinary Clinics and Animal Productions Unit, Department of Emergency and Organ Trasplantation (DETO), University of Bari Aldo Moro Valenzano, Bari, Italy.
| | - Maria E Dell'Aquila
- Department of Bioscience, Biotechnology and Pharmacological Science, University of Bari, 70126, Bari, Italy.
| | - Sandor Cseh
- Department and Clinic of Obstetrics and Reproduction, Szent Istvan University, Budapest, Hungary.
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Niu Y, Wang C, Xiong Q, Yang X, Chi D, Li P, Liu H, Li J, Huang R. Distribution and content of lipid droplets and mitochondria in pig parthenogenetically activated embryos after delipation. Theriogenology 2014; 83:131-8. [PMID: 25280581 DOI: 10.1016/j.theriogenology.2014.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 08/29/2014] [Accepted: 09/01/2014] [Indexed: 11/26/2022]
Abstract
The present study examines the effect of delipation on developmental competence and the distribution pattern of lipid droplets (LDs) and mitochondria in parthenogenetically activated (PA) pig embryos. Mature oocytes were delipated by centrifugation after partial digestion of the zonae pellucidae, subjected to parthenogenetic activation after total removal of zonae pellucidae by pronase, and then cultured in vitro up to the blastocyst stage. The contents and distributions of LDs and mitochondria in the oocytes and/or embryos were observed by staining with Oil Red O and MitoTracker Red CMXRos, respectively. The LD and mitochondrial contents were significantly reduced by the delipation process, and only smaller LDs remained in the delipated oocytes and/or embryos. Their content remained constant from the metaphase II oocyte to the blastocyst stage, but they became gradually smaller as the oocytes and/or embryos developed. The distribution pattern of the LDs in the delipated embryos changed over time and in a manner different to that seen in the controls. In the early developmental stages (1- to 4-cell stages), they were distributed peripherally and formed a ring around the nucleus. However, by the blastocyst stage, a homogeneous distribution of LDs was observed in both the inner cell mass and trophectoderm. The distribution pattern of mitochondria also changed with the development of the delipated PA embryos and again, in ways different to those seen in the controls. In the early 1- to 4-cell stages, a peripheral distribution of mitochondrial foci was observed in each blastomere. However, in blastocysts, the mitochondria were homogeneously distributed throughout the inner cell mass and trophectoderm. Although the cleavage rate at the 2- and 4-cell stages of the PA embryos was not affected by delipation (95.83 ± 2.25% vs. 97.44 ± 0.67%; 79.17 ± 4.47% vs. 84.62 ± 1.19%), it was reduced significantly in the blastocyst compared with the controls (21.67 ± 3.78% vs. 49.36 ± 1.77%). The distribution pattern of the LDs in oocytes and/or embryos at different developmental stages, and that of the mitochondria in metaphase II oocytes, was affected by delipation. The developmental competence of porcine PA embryos would appear to be affected by delipation.
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Affiliation(s)
- Yingjie Niu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Chengfei Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Qiang Xiong
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Xixiang Yang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Daming Chi
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Pinghua Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Honglin Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Juan Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China.
| | - Ruihua Huang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
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Prooxidant effects of verbascoside, a bioactive compound from olive oil mill wastewater, on in vitro developmental potential of ovine prepubertal oocytes and bioenergetic/oxidative stress parameters of fresh and vitrified oocytes. BIOMED RESEARCH INTERNATIONAL 2014; 2014:878062. [PMID: 24719893 PMCID: PMC3955694 DOI: 10.1155/2014/878062] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 12/03/2013] [Accepted: 12/08/2013] [Indexed: 01/25/2023]
Abstract
Verbascoside (VB) is a bioactive polyphenol from olive oil mill wastewater with known antioxidant activity. Oxidative stress is an emerging problem in assisted reproductive technology (ART). Juvenile ART is a promising topic because, in farm animals, it reduces the generation gap and, in human reproductive medicine, it helps to overcome premature ovarian failure. The aim of this study was to test the effects of VB on the developmental competence of ovine prepubertal oocytes and the bioenergetic/oxidative stress status of fresh and vitrified oocytes. In fresh oocytes, VB exerted prooxidant short-term effects, that is, catalase activity increase and uncoupled increases of mitochondria and reactive oxygen species (ROS) fluorescence signals, and long-term effects, that is, reduced blastocyst formation rate. In vitrified oocytes, VB increased ROS levels. Prooxidant VB effects in ovine prepubertal oocytes could be related to higher VB accumulation, which was found as almost one thousand times higher than that reported in other cell systems in previous studies. Also, long exposure times of oocytes to VB, throughout the duration of in vitro maturation culture, may have contributed to significant increase of oocyte oxidation. Further studies are needed to identify lower concentrations and/or shorter exposure times to figure out VB antioxidant effects in juvenile ARTs.
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Russo R, Monaco D, Rubessa M, El-Bahrawy KA, El-Sayed A, Martino NA, Beneult B, Ciannarella F, Dell’Aquila ME, Lacalandra GM, Filioli Uranio M. Confocal fluorescence assessment of bioenergy/redox status of dromedary camel (Camelus dromedarius) oocytes before and after in vitro maturation. Reprod Biol Endocrinol 2014; 12:16. [PMID: 24548378 PMCID: PMC3931272 DOI: 10.1186/1477-7827-12-16] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 02/12/2014] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Reproductive biotechnologies in dromedary camel (Camelus dromedarius) are less developed than in other livestock species. The in vitro maturation (IVM) technology is a fundamental step for in vitro embryo production (IVP), and its optimization could represent a way to increase the success rate of IVP. The aim of the present study was to investigate the bioenergy/oxidative status of dromedary camel oocytes before and after IVM by confocal microscopy 3D imaging. METHODS Oocytes were retrieved by slicing ovaries collected at local slaughterhouses. Recovered oocytes were examined before and after IVM culture for nuclear chromatin configuration and bioenergy/oxidative status, expressed as mitochondria (mt) distribution and activity, intracellular Reactive Oxygen Species (ROS) levels and distribution and mt/ROS colocalization. RESULTS The mean recovery rate was 6 oocytes/ovary. After IVM, 61% of oocytes resumed meiosis and 36% reached the Metaphase II stage (MII). Oocyte bioenergy/redox confocal characterization revealed changes upon meiosis progression. Immature oocytes at the germinal vesicle (GV) stage were characterised by prevailing homogeneous mt distribution in small aggregates while MI and MII oocytes showed significantly higher rates of pericortical mt distribution organized in tubular networks (P<0.05). Increased mt activity in MI (P<0.001) and MII (P<0.01) oocytes compared to GV stage oocytes was also observed. At any meiotic stage, homogeneous distribution of intracellular ROS was observed. Intracellular ROS levels also increased in MI (P<0.01) and MII (P<0.05) oocytes compared to GV stage oocytes. The mt/ROS colocalization signal increased in MI oocytes (P<0.05). CONCLUSIONS This study provides indications that qualitative and quantitative indicators of bioenergy and oxidative status in dromedary camel oocytes are modified in relation with oocyte meiotic stage. These data may increase the knowledge of camel oocyte physiology, in order to enhance the efficiency of IVP procedures.
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Affiliation(s)
- Roberto Russo
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Davide Monaco
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Marcello Rubessa
- National Research Council (CNR), ISPAAM, c/o Istituto tecnico agrario statale “E. De Cellis”, Via Argine 1085, Naples Ponticelli80147, Italy
| | - Khalid A El-Bahrawy
- A.I. Lab., Maryout Research Station (MRS), Desert Research Center (DRC), Al-Nasryia St., Al Amryia, Alexandria, Egypt
| | - Ashraf El-Sayed
- Cairo University Research Park (CURP), Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- Department of Animal Production, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Nicola A Martino
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Benedicte Beneult
- SupAgro, Systèmes d’Elevage Méditerranéens et Tropicaux, UMR_SELMET, Montpellier 34598, France
| | - Francesca Ciannarella
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Maria E Dell’Aquila
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Giovanni M Lacalandra
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
| | - Manuel Filioli Uranio
- Section of Clinics and Animal Productions, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, Str Prov Casamassima, km 3, Bari Valenzano 70010, Italy
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Martino NA, Dell'aquila ME, Cardone RA, Somoskoi B, Lacalandra GM, Cseh S. Vitrification preserves chromatin integrity, bioenergy potential and oxidative parameters in mouse embryos. Reprod Biol Endocrinol 2013; 11:27. [PMID: 23552480 PMCID: PMC3652727 DOI: 10.1186/1477-7827-11-27] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 03/17/2013] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The aim of this study was to evaluate the effects of vitrification on morpho-functional parameters (blastomere/chromatin integrity and bioenergy/oxidative potential) of mouse preimplantation embryos. METHODS In vivo produced mouse (4/16-cell, morulae and blastocyst-stage) embryos were randomly divided into vitrification and control groups. For vitrification, embryos were exposed to a 2-step loading of ethylene glycol and propylene glycol, before being placed in a small nylon loop and submerged into liquid nitrogen. After warming, the cryoprotectants were diluted by a 3-step procedure. Embryo morphology, chromatin integrity and energy/oxidative status were compared between groups. RESULTS Vitrification induced low grade blastomere cytofragmentation (P < 0.05) and low chromatin damage only in embryos at the morula stage (P < 0.001). Mitochondrial (mt) distribution pattern was affected by vitrification only in early embryos (P < 0.001). Mitochondrial activity did not change upon vitrification in morula-stage embryos but it was reduced in blastocyst-stage embryos (P < 0.05). Intracellular ROS levels significantly increased in embryos at the morula and blastocyst stages (P < 0.001). Colocalization of active mitochondria and ROS increased only in vitrified blastocysts. CONCLUSIONS In conclusion, this study elucidates the developmentally-related and mild effects of vitrification on morphology, nuclear and bioenergy/oxidative parameters of mouse embryos and demonstrates that vitrification is a suitable method for preserving predictive parameters of embryo ability to induce a full-term pregnancy.
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Affiliation(s)
- Nicola A Martino
- Veterinary Clinics and Animal Productions Unit, Department of Emergency and Organ Trasplantation (DETO), University of Bari Aldo Moro, Valenzano, Bari, Italy.
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Martino NA, Lacalandra GM, Filioli Uranio M, Ambruosi B, Caira M, Silvestre F, Pizzi F, Desantis S, Accogli G, Dell'Aquila ME. Oocyte mitochondrial bioenergy potential and oxidative stress: within-/between-subject, in vivo versus in vitro maturation, and age-related variations in a sheep model. Fertil Steril 2012; 97:720-8.e1. [PMID: 22260855 DOI: 10.1016/j.fertnstert.2011.12.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 12/13/2011] [Accepted: 12/13/2011] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To analyze within-/between-subject, in vivo versus in vitro maturation (IVM), and age-related variations of mitochondrial (mt) bioenergy potential and oxidative status of metaphase II (MII) oocytes recovered from hormonally stimulated sheep. DESIGN Prospective study. SETTING Academic basic research laboratory. SUBJECT(S) Ten adult ewes. INTERVENTION(S) Estrus synchronization, controlled ovarian hyperstimulation (COH), ovariohysterectomy; follicular and oviductal oocyte retrieval; IVM of follicular oocytes. MAIN OUTCOME MEASURE(S) Mean ± SD, within-subject (CV(w)) and between-subject (CV(b)) variation coefficients of mt activity, intracellular reactive oxygen species (ROS) levels, and mt/ROS colocalization in sheep oocytes from young and aged donors and matured in vivo (in vivo MIIs) or in vitro (IVM MIIs). RESULT(S) Within- and between-subject, in vivo versus IVM, and age-related variations of mt activity were observed in MII oocytes from hormonally stimulated donor sheep. ROS levels increased significantly in oocytes from aged donors. Mt-ROS colocalization was consistently higher in in vivo MIIs compared with IVM MIIs. Oviductal energy/antioxidant ability is influenced by COH. CONCLUSION(S) Oocyte energy/oxidative status is affected by within-/between-subject, in vivo versus IVM, and age-related variations. Mt/ROS colocalization is a reliable marker of in vivo MII oocytes.
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Ambruosi B, Filioli Uranio M, Sardanelli AM, Pocar P, Martino NA, Paternoster MS, Amati F, Dell'Aquila ME. In vitro acute exposure to DEHP affects oocyte meiotic maturation, energy and oxidative stress parameters in a large animal model. PLoS One 2011; 6:e27452. [PMID: 22076161 PMCID: PMC3208636 DOI: 10.1371/journal.pone.0027452] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 10/17/2011] [Indexed: 01/01/2023] Open
Abstract
Phthalates are ubiquitous environmental contaminants because of their use in plastics and other common consumer products. Di-(2-ethylhexyl) phthalate (DEHP) is the most abundant phthalate and it impairs fertility by acting as an endocrine disruptor. The aim of the present study was to analyze the effects of in vitro acute exposure to DEHP on oocyte maturation, energy and oxidative status in the horse, a large animal model. Cumulus cell (CC) apoptosis and oxidative status were also investigated. Cumulus-oocyte complexes from the ovaries of slaughtered mares were cultured in vitro in presence of 0.12, 12 and 1200 µM DEHP. After in vitro maturation (IVM), CCs were removed and evaluated for apoptosis (cytological assessment and TUNEL) and intracellular reactive oxygen species (ROS) levels. Oocytes were evaluated for nuclear chromatin configuration. Matured (Metaphase II stage; MII) oocytes were further evaluated for cytoplasmic energy and oxidative parameters. DEHP significantly inhibited oocyte maturation when added at low doses (0.12 µM; P<0.05). This effect was related to increased CC apoptosis (P<0.001) and reduced ROS levels (P<0.0001). At higher doses (12 and 1200 µM), DEHP induced apoptosis (P<0.0001) and ROS increase (P<0.0001) in CCs without affecting oocyte maturation. In DEHP-exposed MII oocytes, mitochondrial distribution patterns, apparent energy status (MitoTracker fluorescence intensity), intracellular ROS localization and levels, mt/ROS colocalization and total SOD activity did not vary, whereas increased ATP content (P<0.05), possibly of glycolytic origin, was found. Co-treatment with N-Acetyl-Cysteine reversed apoptosis and efficiently scavenged excessive ROS in DEHP-treated CCs without enhancing oocyte maturation. In conclusion, acute in vitro exposure to DEHP inhibits equine oocyte maturation without altering ooplasmic energy and oxidative stress parameters in matured oocytes which retain the potential to be fertilized and develop into embryos even though further studies are necessary to confirm this possibility.
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Affiliation(s)
- Barbara Ambruosi
- Department of Animal Production, University of Bari Aldo Moro, Valenzano, Bari, Italy
| | - Manuel Filioli Uranio
- Department of Animal Production, University of Bari Aldo Moro, Valenzano, Bari, Italy
- * E-mail:
| | - Anna Maria Sardanelli
- Department of Medical Biochemistry, Biology and Physics, University of Bari Aldo Moro, Bari, Italy
| | - Paola Pocar
- Dipartimento di Patologia Animale, Igiene e Sanità Pubblica Veterinaria, University of Milan, Milan, Italy
| | | | | | - Francesca Amati
- Department of Medical Biochemistry, Biology and Physics, University of Bari Aldo Moro, Bari, Italy
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Catalá MG, Izquierdo D, Uzbekova S, Morató R, Roura M, Romaguera R, Papillier P, Paramio MT. Brilliant Cresyl Blue stain selects largest oocytes with highest mitochondrial activity, maturation-promoting factor activity and embryo developmental competence in prepubertal sheep. Reproduction 2011; 142:517-27. [PMID: 21757473 DOI: 10.1530/rep-10-0528] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this study was to test the Brilliant Cresyl Blue (BCB) stain to select prepubertal sheep oocytes for in vitro blastocyst production. Oocyte diameter, mitochondrial activity, maturation-promoting factor (MPF) activity and mRNA relative expression (RE) of genes related to metabolism (ATPase Na(+)/K(+) transporting α 1 (ATP1A1) and cytochrome c oxidase subunit 1 (COX1)) and constitutive function of the cell (cytoplasmic polyadenylation-element-binding protein (CPEB) and S100A10) were assessed. Immature oocytes were exposed to different BCB concentrations (13, 26, 39 and 52 μM) and classified according to their cytoplasm colouration as grown BCB+ (blue cytoplasm) and growing BCB- (colourless cytoplasm). Staining oocytes with 13 μM BCB during 60 min allows selection of (BCB+) the largest (123.66 μm) and most competent oocytes to develop to the blastocyst stage (21%) with a higher number of cells (69.71 ± 6.19 s.e.m.) compared with non-stained BCB- oocytes (106.82 μm, 9% and 45.91 ± 3.35 s.e.m. respectively). Mitochondrial activity, assessed by MitoTracker Orange CMTMRos probe, was significantly higher in BCB+ than in BCB- oocytes after in vitro maturation (3369 and 1565 AU respectively). MPF activity was assessed by CDC2 kinase activity assay showing significantly higher activity at metaphase II stage in BCB+ than in BCB- oocytes (1.479 ± 0.09 and 1.184 ± 0.05 optical density respectively). The genes analysed in this work, ATP1A1, COX1, CPEB and S100A 10, did not show significant effect in mRNA RE between BCB selected oocytes. In conclusion, BCB stains larger and more competent oocytes to develop to the blastocyst stage with more active mitochondria and MPF activity and higher blastocyst cell number.
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Affiliation(s)
- Maria Gracia Catalá
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
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Mitochondrial distribution and meiotic progression in canine oocytes during in vivo and in vitro maturation. Theriogenology 2010; 75:346-53. [PMID: 21074834 DOI: 10.1016/j.theriogenology.2010.09.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 09/07/2010] [Accepted: 09/08/2010] [Indexed: 11/20/2022]
Abstract
The objective was to evaluate mitochondrial distribution, and its relationship to meiotic development, in canine oocytes during in vitro maturation (IVM) at 48, 72, and 96 h, compared to those that were non-matured or in vivo matured (ovulated). The distribution of active mitochondria during canine oocyte maturation (both in vitro and in vivo) was assessed with fluorescence and confocal microscopy using MitoTracker Red (MT-Red), whereas chromatin configuration was concurrently evaluated with fluorescence microscopy and DAPI staining. During IVM, oocytes exhibited changes in mitochondrial organization, ranging from a fine uniform distribution (pattern A), to increasing clustering spread throughout the cytoplasm (pattern B), and to a more perinuclear and cortical distribution (pattern C). Pattern A was mainly observed in germinal vesicle (GV) oocytes (96.4%), primarily in the non-matured group (P < 0.05). Pattern B was seen in all ovulated oocytes which were fully in second metaphase (MII), whereas in IVM oocytes, ∼64% were pattern B, irrespective of duration of culture or stage of nuclear development (P > 0.05). Pattern C was detected in a minor percentage (P < 0.05) of oocytes (mainly those in first metaphase, MI) cultured for 72 or 96 h. In vitro matured oocytes had a minor percentage of pattern B (P < 0.05) and smaller mitochondrial clusters in IVM oocytes than ovulated oocytes, reaching only 4, 11, and 17% of MII at 48, 72, and 96 h, respectively. Thus, although IVM canine oocytes rearranged mitochondria, which could be related to nuclear maturation, they did not consistently proceed to MII, perhaps due to incomplete IVM, confirming that oocytes matured in vitro were less likely to be competent than those matured in vivo.
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