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Bellido-Quispe DK, Arcce IML, Pinzón-Osorio CA, Campos VF, Remião MH. Chemical activation of mammalian oocytes and its application in camelid reproductive biotechnologies: A review. Anim Reprod Sci 2024; 266:107499. [PMID: 38805838 DOI: 10.1016/j.anireprosci.2024.107499] [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: 02/05/2024] [Revised: 04/10/2024] [Accepted: 05/10/2024] [Indexed: 05/30/2024]
Abstract
Mammalian oocyte activation is a critical process occurring post-gamete fusion, marked by a sequence of cellular events initiated by an upsurge in intracellular Ca2+. This surge in calcium orchestrates the activation/deactivation of specific kinases, leading to the subsequent inactivation of MPF and MAPK activities, alongside PKC activation. Despite various attempts to induce artificial activation using distinct chemical compounds as Ca2+ inducers and/or Ca2+-independent agents, the outcomes have proven suboptimal. Notably, incomplete suppression of MPF and MAPK activities persists, necessitating a combination of different agents for enhanced efficiency. Moreover, the inherent specificity of activation methods for each species precludes straightforward extrapolation between them. Consequently, optimization of protocols for each species and for each technique, such as PA, ICSI, and SCNT, is required. Despite recent strides in camelid biotechnologies, the field has seen little advancement in chemical activation methods. Only a limited number of chemical agents have been explored, and the effects of many remain unknown. In ICSI, despite obtaining blastocysts with different chemical compounds that induce Ca2+ and calcium-independent increases, viable offspring have not been obtained. However, SCNT has exhibited varying outcomes, successfully yielding viable offspring with a reduced number of chemical activators. This article comprehensively reviews the current understanding of the physiological activation of oocytes and the molecular mechanisms underlying chemical activation in mammals. The aim is to transfer and apply this knowledge to camelid reproductive biotechnologies, with emphasis on chemical activation in PA, ICSI, and SCNT.
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Affiliation(s)
| | | | - César Augusto Pinzón-Osorio
- Laboratório de Fisiopatologia e Biotécnicas da Reprodução Animal (FiBRA), Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Vinicius Farias Campos
- Laboratório de Genômica Estrutural, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Mariana Härter Remião
- Laboratório de Genômica Estrutural, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
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Alhaider AK. Insulin-like growth factor-1 improves in vitro meiotic resumption of dromedary camel (Camelus Dromedarius) oocytes. Anim Reprod 2023; 20:e20220105. [PMID: 37416869 PMCID: PMC10321681 DOI: 10.1590/1984-3143-ar2022-0105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 05/08/2023] [Indexed: 07/08/2023] Open
Abstract
Despite relatively high maturation rate of in vitro matured oocytes in the dromedary camel, however, blastocyst production is very low after in vitro fertilization (IVF). Herein, the influences of oocyte collection method (follicular aspiration vs slicing; Experiment I), the addition of Insulin-like growth factor I (IGF-I) to the maturation medium (Experiment II) on in vitro maturation (IVM) of oocyte were investigated. Although the nuclear maturation did not differ regardless of collecting method, follicular aspiration led to lower degeneration rates than those in controls (P < 0.05). The percentages of oocytes at MII were greater in the presence of IGF-1 than in its absence (71.9% vs 48.4%, respectively, P<0.05). Additionally, the percentages of degenerated oocytes were higher in the control group compared to oocytes cultured in the presence of IGF-I (23.6% vs 10.4%, respectively, P<0.05). IGF-I treatment improved the quality of MII matured oocytes as evidenced by the decrease of cathepsin B (CTSB) activity, a marker of poor quality oocytes, when compared to control ones (P < 0.05). In conclusion, follicular aspiration decreased the degeneration rate; however, it had no effect on completion of maturation. IGF-I enhanced the IVM of oocyte and decreased degeneration rate.
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Affiliation(s)
- Abdulrahman Khalid Alhaider
- Department of Clinical Sciences, College of Veterinary Medicine, King Faisal University, Alahsa, Saudi Arabia
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Cui W. Oocyte Spontaneous Activation: An Overlooked Cellular Event That Impairs Female Fertility in Mammals. Front Cell Dev Biol 2021; 9:648057. [PMID: 33763428 PMCID: PMC7982476 DOI: 10.3389/fcell.2021.648057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/08/2021] [Indexed: 01/14/2023] Open
Abstract
In mammals, including humans, mature oocytes are ovulated into the oviduct for fertilization. Normally, these oocytes are arrested at metaphase of the second meiosis (MII), and this arrest can be maintained for a certain period, which is essential for fertilization in vivo and oocyte manipulations in vitro, such as assisted reproduction in clinics and nuclear/spindle transfer in laboratories. However, in some species and under certain circumstances, exit from MII occurs spontaneously without any obvious stimulation or morphological signs, which is so-called oocyte spontaneous activation (OSA). This mini-review summarizes two types of OSA. In the first type (e.g., most rat strains), oocytes can maintain MII arrest in vivo, but once removed out, oocytes undergo OSA with sister chromatids separated and eventually scattered in the cytoplasm. Because the stimulation is minimal (oocyte collection itself), this OSA is incomplete and cannot force oocytes into interphase. Notably, once re-activated by sperm or chemicals, those scattered chromatids will form multiple pronuclei (MPN), which may recapitulate certain MPN and aneuploidy cases observed in fertility clinics. The second type of OSA occurs in ovarian oocytes (e.g., certain mouse strains and dromedary camel). Without ovulation or fertilization, these OSA-oocytes can initiate intrafollicular development, but these parthenotes cannot develop to term due to aberrant genomic imprinting. Instead, they either degrade or give rise to ovarian teratomas, which have also been reported in female patients. Last but not the least, genetic models displaying OSA phenotypes and the lessons we can learn from animal OSA for human reproduction are also discussed.
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Affiliation(s)
- Wei Cui
- Department of Veterinary and Animal Sciences, Animal Models Core Facility, Institute for Applied Life Sciences (IALS), University of Massachusetts Amherst, Amherst, MA, United States
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Wani NA. In vitro embryo production (IVEP) in camelids: Present status and future perspectives. Reprod Biol 2020; 21:100471. [PMID: 33307379 DOI: 10.1016/j.repbio.2020.100471] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 02/03/2023]
Abstract
Camels are a fundamental livestock resource with a significant role in the agricultural economy of dry regions of Asia and Africa. Similarly, llamas and alpacas are an indigenous resource considered as beasts of burden in South America because of their surefootedness and ability to adapt. Camel racing, a highly lucrative and well-organized sport, camel beauty contests, and high demand for camel milk lead to a steady interest in the multiplication of elite animals by in vitro embryo production (IVEP) in this species during the last few decades. Although offspring have been produced from in vitro produced embryos, the technique is still not that well developed compared with other domestic animal species such as cattle. IVEP involves many steps, including the collection of oocytes from either slaughterhouse ovaries or live animals through ultrasound-guided transvaginal aspiration; in vitro maturation of these collected oocytes; collection and preparation of semen for fertilization; culture and passaging of cells for nuclear transfer, chemical activation of the reconstructed embryos, and in vitro culture of embryos up to the blastocyst stage for transfer into synchronized recipients to carry them to term. This review discusses the present status of all these steps involved in the IVEP of camelids and their future perspectives.
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Affiliation(s)
- Nisar Ahmad Wani
- Reproductive Biotechnology Centre, Post Box 299003, Dubai, United Arab Emirates.
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Abdoon ASS, Kandil OM, Zeng SM. Intrafollicular spontaneous parthenogenetic development of dromedary camel oocytes. Mol Reprod Dev 2020; 87:704-710. [PMID: 32415813 DOI: 10.1002/mrd.23350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 05/04/2020] [Indexed: 11/08/2022]
Abstract
Dromedary camel oocytes are unique in their capability for intrafollicular and in vitro spontaneous parthenogenetic activation (SPA) and development. This study was designed for (a) observing the incidence of SPA and development of dromedary camel oocytes retrieved from ovaries; (b) assessing intrafollicular development of dromedary camel oocytes using histological examination; (c) evaluating the abilities of dromedary camel oocytes to mature, SPA, and develop in vitro; and (d) identifying the transcript abundance of Cdx2 messenger RNA (mRNA) expression in different stages of SPA and developed camel embryos. The results revealed that 2.33% of oocytes retrieved from dromedary camel ovaries were SPA and developed to blastocyst stage. Serial sections of dromedary camel ovaries also demonstrated the presence of 1.4 SPA and parthenotes per ovary, which included from two-cell to the blastocysts with demarcated trophectoderm and inner cell mass layers. A total of 2.6% in vitro matured dromedary camel oocytes developed into morulae. The SPA and developed dromedary embryos expressed transcript abundance for Cdx2 mRNA with the highest (p < .05) at the blastocyst. The present work determines for the first time the intrafollicular oocytes from the dromedary camel display SPA, and the parthenotes can develop into blastocysts and expressing Cdx2 mRNA.
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Affiliation(s)
- Ahmed S S Abdoon
- Department of Animal Reproduction and Artificial Insemination, Veterinary Research Division, National Research Centre, Cairo, Egypt
| | - Omaima M Kandil
- Department of Animal Reproduction and Artificial Insemination, Veterinary Research Division, National Research Centre, Cairo, Egypt
| | - Shen-Ming Zeng
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Moulavi F, Hosseini S. Diverse patterns of cumulus cell expansion during in vitro maturation reveal heterogeneous cellular and molecular features of oocyte competence in dromedary camel. Theriogenology 2018; 119:259-267. [DOI: 10.1016/j.theriogenology.2018.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 07/13/2018] [Accepted: 07/14/2018] [Indexed: 01/29/2023]
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Yaqoob SH, Saadeldin IM, Swelum AAA, Alowaimer AN. Optimizing camel ( Camelus dromedarius ) oocytes in vitro maturation and early embryo culture after parthenogenetic activation. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2017.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Morphometric assessment of in vitro matured dromedary camel oocytes determines the developmental competence after parthenogenetic activation. Theriogenology 2017; 95:141-148. [DOI: 10.1016/j.theriogenology.2017.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/14/2017] [Accepted: 03/14/2017] [Indexed: 11/24/2022]
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9
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Mesbah F, Kafi M, Nili H. Cumulus cell expansion and first polar body extrusion duringin vitrooocyte maturation in relation to morphological and morphometric characteristics of the dromedary camel ovary. Reprod Domest Anim 2016; 51:916-923. [DOI: 10.1111/rda.12758] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 07/16/2016] [Indexed: 11/30/2022]
Affiliation(s)
- F Mesbah
- Department of Anatomical Sciences; School of Medicine; Shiraz University of Medical Sciences; Shiraz Iran
| | - M Kafi
- Department of Animal Reproduction; School of Veterinary Medicine; Shiraz University; Shiraz Iran
| | - H Nili
- Department of Clinical Sciences; School of Veterinary Medicine; Shiraz University; Shiraz Iran
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In vitro developmental competence of alpaca (Vicugna pacos) and llama (Lama glama) oocytes after parthenogenetic activation. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abdoon ASS, Kandil OM, Zeng SM, Cui M. Mitochondrial distribution, ATP-GSH contents, calcium [Ca2+] oscillation during in vitro maturation of dromedary camel oocytes. Theriogenology 2011; 76:1207-14. [PMID: 21820723 DOI: 10.1016/j.theriogenology.2011.05.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 05/17/2011] [Accepted: 05/19/2011] [Indexed: 11/15/2022]
Abstract
Dromedary camel oocytes have the ability to spontaneous parthenogenetic activation and development in vivo and in vitro. The present study was conducted to investigate changes in mitochondrial distribution, adenosine triphosphate (ATP), and glutathione (GSH) contents and [Ca(2+)] oscillation during in vitro maturation and spontaneous parthenogentic activation of dromedary camel oocytes. Dromedary camel cumulus-oocyte complexes (COCs) were matured in TCM199 medium supplemented with 10% FCS + 10 μg/mL FSH + 10 IU hCG + 10 IU eCG + 10 ng/mL EGF and 50 μg/mL gentamycine. Maturation was performed at 38.5 °C under 5% CO(2) in humidified air for 40 h. After maturation and removal of cumulus cells, oocytes were classified into: immature cultured (Group 1); metaphase II (M II, Group 2); and spontaneously parthenogenetically activated (with 2 polar bodies, Group 3); cleaved embryos (Group 4); and immature oocytes served as a control (Group 5). Cytoplasmic mitochondrial distribution, ATP-GSH contents, calcium [Ca(2+)] oscillation were determined. Results indicated that M II and spontaneously parthenogenetically activated oocytes represent 37.53% and 32.67% of the cultured oocytes, respectively, and 3.3% cleaved and developed to 2-16-cell stage embryos. Mitochondrial distribution, ATP-GSH contents and [Ca(2+)] oscillation were significantly (P < 0.01) differ between immature and matured dromedary camel oocytes. Mitochondrial distribution showed clustering form in matured oocytes without polar body. High polarized mitochondrial distribution (HPM) was detected in M II and spontaneously parthenogenetically activated oocytes, and the intensity of MitoTracker Red was higher in spontaneously parthenogenetically activated than M II. ATP-GSH contents and the duration of [Ca(2+)] oscillation were significantly (P < 0.01) higher in spontaneously parthenogenetically activated than M II oocytes or that matured without polar body. In conclusion, the higher incidence of spontaneously parthenogenetically activated in vitro matured dromedary camel oocytes could be attributed to the high polarized mitochondrial distribution associated with significantly higher ATP-GSH contents and duration of [Ca(2+)] oscillation.
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Affiliation(s)
- Ahmed Sabry S Abdoon
- Department of Animal Reproduction and Artificial Insemination, Veterinary Research Division, National Research Centre, Cairo, Egypt.
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Wani N, Skidmore J. Ultrasonographic-guided retrieval of cumulus oocyte complexes after super-stimulation in dromedary camel (Camelus dromedarius). Theriogenology 2010; 74:436-42. [DOI: 10.1016/j.theriogenology.2010.02.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2009] [Revised: 02/01/2010] [Accepted: 02/28/2010] [Indexed: 11/29/2022]
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13
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Khatir H, Anouassi A, Tibary A. In vitro and in vivo developmental competence of dromedary (Camelus dromedarius) oocytes following in vitro fertilization or parthenogenetic activation. Anim Reprod Sci 2009; 113:212-9. [DOI: 10.1016/j.anireprosci.2008.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 07/02/2008] [Accepted: 07/18/2008] [Indexed: 10/21/2022]
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14
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Khatir H, Anouassi A. Preliminary assessment of somatic cell nuclear transfer in the dromedary (Camelus dromedarius). Theriogenology 2008; 70:1471-7. [DOI: 10.1016/j.theriogenology.2008.06.094] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 05/14/2008] [Accepted: 06/23/2008] [Indexed: 10/21/2022]
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