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Merlo B, Del Prete C, Mari G, Iacono E. Overnight holding aids in selection of developmentally competent equine oocytes. Anim Reprod Sci 2022; 245:107071. [PMID: 36152450 DOI: 10.1016/j.anireprosci.2022.107071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 11/01/2022]
Abstract
The demand for equine in vitro produced embryos has increased over the last decade. The aim of this study was to compare the effects of an extended IVM or a prolonged period before fertilization, including holding time, on equine immature oocyte developmental competence. Oocytes, collected from abattoir-derived ovaries, were divided into 4 groups: H0/24 (n = 165) 0 h holding + standard 24-26 h IVM; H8/36 (n = 160) 8 h holding + 36 h IVM; H20/24 (n = 187) 20 h holding + 24 h IVM; H0/44 (n = 164) 0 h holding + 44 h IVM. Oocytes matured to MII were fertilized by intracytoplasmic sperm injection (ICSI) and cultured for 10 days. The oocyte degeneration rate was higher (P < 0.05) for H20/24 than the other groups (H0/24 38.2 %, H8/36 43.1 %, H20/24 54.5 %, H0/44 32.9 %). Cleavage was higher (P < 0.05) in H20/24 (70 %) compared to H0/24 (45 %) and H8/36 (54 %) but not to H0/44 (63 %). No differences among groups were observed in the number of blastocysts per oocyte. Injected oocytes that reached the blastocysts stage were higher (P < 0.05) for H20/24 (20 %) than H0/24 (7 %) and H0/44 (7 %) but not H8/36 (12 %). For cleaved oocytes, a higher blastocyst rate (P < 0.05) was observed for H20/24 (28 %) than H0/44 (11 %), while H0/24 (15 %) and H8/36 (21 %) were not different from any group (P > 0.05). Timing of blastocyst development was not different among groups. Overnight holding of equine immature oocytes followed by a standard IVM interval may induce a pre-selection of the most competent oocytes thereby improving cleavage and embryo development rates after ICSI.
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Affiliation(s)
- Barbara Merlo
- Department of Veterinary Medical Sciences, University of Bologna, via Tolara di Sopra 50, 40064 Ozzano Emilia, BO, Italy.
| | - Chiara Del Prete
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via Federico Delpino 1, 80137 Napoli, NA, Italy
| | - Gaetano Mari
- Department of Veterinary Medical Sciences, University of Bologna, via Tolara di Sopra 50, 40064 Ozzano Emilia, BO, Italy; National Institute of Artificial Insemination, University of Bologna, via Gandolfi 16, 40057 Cadriano, BO, Italy
| | - Eleonora Iacono
- Department of Veterinary Medical Sciences, University of Bologna, via Tolara di Sopra 50, 40064 Ozzano Emilia, BO, Italy
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Rakha SI, Elmetwally MA, El-Sheikh Ali H, Balboula A, Mahmoud AM, Zaabel SM. Importance of Antioxidant Supplementation during In Vitro Maturation of Mammalian Oocytes. Vet Sci 2022; 9:vetsci9080439. [PMID: 36006354 PMCID: PMC9415395 DOI: 10.3390/vetsci9080439] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/12/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022] Open
Abstract
The in vitro embryo production (IVEP) technique is widely used in the field of reproductive biology. In vitro maturation (IVM) is the first and most critical step of IVEP, during which, the oocyte is matured in an artificial maturation medium under strict laboratory conditions. Despite all of the progress in the field of IVEP, the quality of in vitro matured oocytes remains inferior to that of those matured in vivo. The accumulation of substantial amounts of reactive oxygen species (ROS) within oocytes during IVM has been regarded as one of the main factors altering oocyte quality. One of the most promising approaches to overcome ROS accumulation within oocytes is the supplementation of oocyte IVM medium with antioxidants. In this article, we discuss recent advancements depicting the adverse effects of ROS on mammalian oocytes. We also discuss the potential use of antioxidants and their effect on both oocyte quality and IVM rate.
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Affiliation(s)
- Shimaa I. Rakha
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mohammed A. Elmetwally
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Hossam El-Sheikh Ali
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Ahmed Balboula
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Animal Sciences Research Center, University of Missouri, Columbia, MO 65211, USA
| | - Abdelmonem Montaser Mahmoud
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Samy M. Zaabel
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Reproductive Biotechnology Research Laboratory, College of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
- Correspondence:
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Fidelis AAG, de Oliveira Fernandes G, Melo FR, Leme LO, Adona PR, Kawamoto TS, Dode MAN. Ethanolic Extract of Dried Leaves from the Cerrado Biome Increases the Cryotolerance of Bovine Embryos Produced In Vitro. Oxid Med Cell Longev 2020; 2020:6046013. [PMID: 33299527 DOI: 10.1155/2020/6046013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 06/10/2020] [Accepted: 10/29/2020] [Indexed: 01/29/2023]
Abstract
In vitro embryo production (IVP) induces excessive production of reactive oxygen species (ROS), which affects blastocyst quality. Therefore, the supplementation of culture media with antioxidants is an alternative to overcome oxidative stress damage. However, there is a growing demand for the use of antioxidant compounds that are more natural and less toxic in cell cultures. The present study is aimed at evaluating the effect of ethanolic extracts from cerrado leaves on IVP. First, the antioxidant capacity and the amount of phenolic compounds of the leaves were evaluated. Then, the best ethanolic extract concentration composed of cagaita (Eugenia dysenterica) and murici (Byrsonima crassifolia) to be used during the in vitro culture of in vitro-produced embryos was determined. Afterward, we evaluated the influence of the extract of both plants on ROS and glutathione (GSH) production, while also evaluating the apoptosis and ROS metabolism gene expression. In a subsequent step, the effect of the ethanolic extracts of dried cagaita and murici leaves during embryonic cultivation on the cryotolerance of expanded blastocysts was studied. The results showed a significant reduction in the proportion of apoptotic cells from embryos cultivated with 0.01 mg/mL of the cagaita ethanolic extract, besides inducing an increase in the GPX4 and PRDX3 transcription levels. The murici ethanolic extract induced an increase in the transcription abundance of these genes but did not reduce the proportion of apoptotic cells. In addition, expanded blastocysts cultivated with extracts at a concentration of 0.01 mg/mL and cryopreserved had higher hatching rates and lower degeneration rates when compared to the frozen group previously supplemented with the extracts. Moreover, the apoptosis rate of embryos cultured for 12 h after cryopreservation was lower in groups previously exposed to extracts during in vitro cultivation. Such extracts may be used as alternatives to increase the cryotolerance of in vitro-produced embryos.
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Nascimento TS, Silva ISM, Alves MCMA, Gouveia BB, Barbosa LMR, Macedo TJS, Santos JMS, Monte APO, Matos MHT, Padilha FF, Lima-Verde IB. Effect of red propolis extract isolated or encapsulated in nanoparticles on the in vitro culture of sheep preantral follicle: Impacts on antrum formation, mitochondrial activity and glutathione levels. Reprod Domest Anim 2018; 54:31-38. [DOI: 10.1111/rda.13347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 07/08/2018] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Bruna B. Gouveia
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
| | - Lara Mariane R. Barbosa
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
| | - Taís J. S. Macedo
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
| | - Jamile M. S. Santos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
| | - Alane P. O. Monte
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
| | - Maria Helena T. Matos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development; Federal University of São Francisco Valley; Petrolina-PE Brazil
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