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Alfradique VAP, Alves SVP, Netto DLS, Machado AF, Penitente-Filho JM, da Silva W, Brandão FZ, Lopes MS, Guimarães SEF. The effect of age and FSH stimulation on the ovarian follicular response, nuclear maturation, and gene expression of cumulus-oocyte complexes in prepubertal gilts. Theriogenology 2023; 199:57-68. [PMID: 36696770 DOI: 10.1016/j.theriogenology.2023.01.015] [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: 09/17/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 01/19/2023]
Abstract
This study investigated the effects of age and FSH treatment on the ovarian response, follicular fluid (FF) biochemical composition, nuclear maturation, and molecular profile of cumulus-oocytes complexes (COCs) recovered from prepubertal gilts. Thirty-five prepubertal gilts were separated according to age [140 (n = 20) or 160 (n = 15) days], and within each age, the gilts were allotted to receive either 100 mg of FSH [treated; G140+FSH (n = 10) and G160+FSH (n = 7)] or saline solution [control; G140+control (n = 10) and G160+control (n = 8)]. Thus, four experimental groups were included in this study. In the FSH-treated gilts, the percentage of medium follicles increased (P < 0.0001) in the same proportion with which the percentage of small follicles decreased (P < 0.0001). In addition, the glucose concentration in the FF obtained from medium follicles increased (P < 0.05), while that of triglycerides decreased (P < 0.05) in the FSH-treated gilts. The FSH stimulation also improved (P < 0.05) the number of grade I COCs obtained from medium follicles and the meiotic maturation and BCB + rates. FSH treatment only upregulated (P < 0.05) HMGCR expression in immature COCs from prepubertal gilts. The metaphase II and BCB + rates, FF glucose and plasma IGF-1 levels were greater (P < 0.05) in prepubertal gilts at 160 than at 140 days of age. Age had no effect (P > 0.05) on the transcript abundance of the target genes in immature COCs. Hence, oocytes obtained from 140-day-old prepubertal gilts appeared less meiotically competent than those of 160-day-old prepubertal gilts. Our study suggests a possible strategy of using FSH treatment to improve oocyte quantity, quality, and nuclear maturation in 140 and 160-day-old prepubertal gilts.
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Affiliation(s)
- Vivian Angélico Pereira Alfradique
- Departamento de Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil.
| | - Saullo Vinícius Pereira Alves
- Departamento de Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil
| | - Domingos Lollobrigida Souza Netto
- Departamento de Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil
| | - Andréia Ferreira Machado
- Departamento de Zootecnia, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil
| | - Jurandy Mauro Penitente-Filho
- Departamento de Veterinária, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil
| | - Walmir da Silva
- Departamento de Zootecnia, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil
| | - Felipe Zandonadi Brandão
- Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil, 64, CEP 24230-340, Niterói, RJ, Brazil
| | - Marcos Soares Lopes
- Topigs Norsvin Brasil, Rua Visconde do Rio Branco, 1310, CEP 80420-210, Curitiba, PR, Brazil
| | - Simone Eliza Facioni Guimarães
- Departamento de Zootecnia, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, Campus Universitário, CEP 36570-900, Viçosa, MG, Brazil.
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Malyszka N, Pawlak P, Cieslak A, Szkudelska K, Lechniak D. Distinct dynamics of lipid accumulation by porcine cumulus cells during in vitro maturation with follicular fluid of low and high fatty acid contents. Theriogenology 2023; 195:93-102. [DOI: 10.1016/j.theriogenology.2022.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/06/2022] [Accepted: 10/11/2022] [Indexed: 11/17/2022]
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Sun JT, Liu JH, Jiang XQ, Luo X, Yuan JD, Zhang Q, Qi XY, Lee S, Liu ZH, Jin JX. Tannin Reduces the Incidence of Polyspermic Penetration in Porcine Oocytes. Antioxidants (Basel) 2022; 11:antiox11102027. [PMID: 36290750 PMCID: PMC9598560 DOI: 10.3390/antiox11102027] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 12/03/2022] Open
Abstract
Tannin (TA) improves porcine oocyte cytoplasmic maturation and subsequent embryonic development after in vitro fertilization (IVF). However, the mechanism through which TA blocks polyspermy after IVF remains unclear. Hence, the biological function of organelles (cortical granule [CG], Golgi apparatus, endoplasmic reticulum [ER], and mitochondria) and the incidence of polyspermic penetration were examined. We found no significant difference in oocyte nuclear maturation among the 1 µg/mL, 10 µg/mL TA, and control groups. Moreover, 100 μg/mL TA significantly reduced 1st polar body formation rate compared to the other groups. Additionally, 1 and 10 μg/mL TA significantly increased the protein levels of GDF9, BMP15, and CDK1 compared to the control and 100 μg/mL TA groups. Interestingly, 1 and 10 μg/mL TA improved the normal distribution of CGs, Golgi, ER, and mitochondria by upregulating organelle-related gene expression and downregulating ER stress (CHOP) gene expression. Simultaneously, 1 and 10 μg/mL TA significantly increased the proportion of normal fertilized oocytes (2 pronuclei; 2 PN) and blastocyst formation rate compared to the control, as well as that of 100 μg/mL TA after IVF by upregulating polyspermy-related genes. In conclusion, TA during IVM enhances 2PN and blastocyst formation rates by regulating organelles’ functions and activities.
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Affiliation(s)
- Jing-Tao Sun
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Jia-Hui Liu
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xi-Qing Jiang
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xin Luo
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Jin-Dong Yuan
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Qi Zhang
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xin-Yue Qi
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Sanghoon Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
| | - Zhong-Hua Liu
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
- Correspondence: (Z.-H.L.); (J.-X.J.)
| | - Jun-Xue Jin
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
- Correspondence: (Z.-H.L.); (J.-X.J.)
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Pan P, Huang X. The Clinical Application of Growth Hormone and Its Biological and Molecular Mechanisms in Assisted Reproduction. Int J Mol Sci 2022; 23:ijms231810768. [PMID: 36142677 PMCID: PMC9505823 DOI: 10.3390/ijms231810768] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 11/26/2022] Open
Abstract
Growth hormone (GH) has been used as a co-gonadotrophin in assisted reproduction, particularly in poor ovarian responders. The application of GH has been alleged to activate primordial follicles and improve oocyte quality, embryo quality, and steroidogenesis. However, the effects of GH on the live birth rate among women is controversial. Additionally, although the basic biological mechanisms that lead to the above clinical differences have been investigated, they are not yet well understood. The actions of GH are mediated by GH receptors (GHRs) or insulin-like growth factors (IGFs). GH regulates the vital signal transduction pathways that are involved in primordial follicular activation, steroidogenesis, and oocyte maturation. However, the therapeutic windows and duration of GH administration during assisted reproductive technology require further investigation. The review aimed to clarify the role of GH in human fertility from a molecular and biological point of view to provide evidence for proper GH administration.
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Serrano Albal M, Silvestri G, Kiazim LG, Vining LM, Zak LJ, Walling GA, Haigh AM, Harvey SC, Harvey KE, Griffin DK. Supplementation of porcine in vitro maturation medium with FGF2, LIF, and IGF1 enhances cytoplasmic maturation in prepubertal gilts oocytes and improves embryo quality. ZYGOTE 2022;:1-8. [PMID: 36047469 DOI: 10.1017/S0967199422000284] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In porcine in vitro production (IVP) systems, the use of oocytes derived from prepubertal gilts, whilst being commercially attractive, remains challenging due to their poor developmental competence following in vitro maturation (IVM). Follicular fluid contains important growth factors and plays a key role during oocyte maturation; therefore, it is a common supplementation for porcine IVM medium. However, follicular fluid contains many poorly characterized components, is batch variable, and its use raises biosecurity concerns. In an effort to design a defined IVM system, growth factors such as cytokines have been previously tested. These include leukaemia inhibitory factor (LIF), fibroblast growth factor 2 (FGF2), and insulin-like growth factor 1 (IGF1), the combination of which is termed 'FLI'. Here, using abattoir-derived oocytes in a well established porcine IVP system, we compared follicular fluid and FLI supplementation during both IVM and embryo culture to test the hypothesis that FLI can substitute for follicular fluid without compromising oocyte nuclear and cytoplasmic maturation. We demonstrate that in oocytes derived from prepubertal gilts, FLI supplementation enhances oocyte meiotic maturation and has a positive effect on the quality and developmental competence of embryos. Moreover, for the first time, we studied the effects of follicular fluid and FLI combined showing no synergistic effects.
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Jochems R, Gaustad AH, Zak LJ, Grindflek E, Zeremichael TT, Oskam IC, Myromslien FD, Kommisrud E, Krogenaes AK. Ovarian characteristics and in vitro nuclear and cytoplasmic oocyte maturation in Duroc and Landrace pigs. Vet Med Sci 2021; 7:1845-1853. [PMID: 33938143 PMCID: PMC8464249 DOI: 10.1002/vms3.498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/11/2021] [Accepted: 04/07/2021] [Indexed: 01/17/2023] Open
Abstract
Differences in total number of piglets born per litter are observed between the Norwegian Duroc (ND) sire and Norwegian Landrace (NL) dam line. The aim of this study was to evaluate ovarian characteristics, and in vitro nuclear and cytoplasmic oocyte maturation in both breeds. One day after weaning, follicular phase ovaries were collected. Ovary length and weight were measured and the number of follicles (< 3 mm and 3–8 mm) was counted. Cumulus‐oocyte complexes (COCs) were collected and matured for 48 hr. To assess cumulus expansion, COC area was analysed at 0 and 20 hr. Nuclear maturation and cortical granule (CG) distribution were analysed at 20 and 48 hr, and total glutathione (GSH) was measured at 48 hr to further elucidate cytoplasmic maturation. In first parity sows, a smaller ovary length and fewer 3 to 8 mm follicles were observed in ND compared to NL. For all sows, ND COCs covered a significantly smaller area at 0 hr, but a higher cumulus expansion ratio was observed at 20 hr compared to NL (364 ± 46% versus. 278 ± 27%, p < 0.001). At 20 hr, more ND oocytes exhibited advanced stages of nuclear maturation, while more NL oocytes showed advanced stages of CG distribution. Nuclear maturation to MII stage at 48 hr did not differ between ND and NL oocytes (90.1% and 87.7%, respectively). Moreover, no significant differences were observed for GSH content or CG distribution after maturation. In conclusion, differences with regard to ovarian characteristics as well as to cumulus expansion, and nuclear and cytoplasmic oocyte maturation at 20 hr were observed between the breeds. Further studies are required to determine if this subsequently affects in vitro fertilization and embryo development.
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Affiliation(s)
- Reina Jochems
- Norsvin SA, Hamar, Norway.,Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | | | - Louisa J Zak
- Topigs Norsvin Research Center, Beuningen, The Netherlands
| | | | - Teklu T Zeremichael
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Irma C Oskam
- The Animal Production Experimental Centre, Norwegian University of Life Sciences, Ås, Norway
| | - Frøydis D Myromslien
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Elisabeth Kommisrud
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Anette K Krogenaes
- Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
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Masciangelo R, Chiti MC, Philippart C, Amorim CA, Donnez J, Camboni A, Dolmans MM. Follicle populations and vascularization in ovarian tissue of pediatric patients before and after long-term grafting. Fertil Steril 2020; 114:1330-1338. [DOI: 10.1016/j.fertnstert.2020.06.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/04/2020] [Accepted: 06/23/2020] [Indexed: 12/21/2022]
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8
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Libera K, Włodarek J, Warzych E, Cieślak A, Szumacher-strabel M, Jankowiak T, Lechniak D. Reproductive Performance of Dairy Cows Fed a Diet Supplemented with n-3 Polyunsaturated Fatty Acids – A Review. Annals of Animal Science 2020; 20:1169-83. [DOI: 10.2478/aoas-2020-0040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The aim of this review is to summarize the current state of knowledge of reproductive performance of high-yielding dairy cows fed a diet supplemented with n-3 fatty acids (FA s), and to recommend a feeding schedule that can increase the success rate in reproduction. Dietary supplementation with fat, especially FA, has become an accepted strategy for supporting the fertility of high-yielding dairy cows. The two main categories of FA s, unsaturated fatty acids (UFA s) and saturated fatty acids (SFA s), exert distinct effects on reproductive functions, with UFA having a conclusively beneficial impact. Polyunsaturated fatty acids (PUFAs) are of particular importance on account of their biological properties. Standard feedstuffs (such as soybean) are rich in n-6 FA s, whereas few feedstuffs contain n-3 FA s. Neither the n-3 nor n-6 PUFA s are synthetized by the animal. Several field experiments have indicated that the recommended schedule of n-3 supplementation should last 160–170 days, from the eighth week before calving to 100 or 120 days postpartum. Supplementation of the diet thus covers the period from the late preantral stage of the follicle, the entire development of the antrum, oocyte ovulation, and fertilization, as well as the development of the preattachment embryo and its implantation. The following effects are among the important beneficial results of supplementation with n-3 FA s: a higher number of antral follicles suitable for ovum pick-up (OPU), larger dominant follicles and corresponding CL, better quality oocytes and embryos, and higher implantation rates resulting from improved uterine environment (e.g., reduced synthesis of luteolytic PGF2α). We conclude that dietary supplementation for high-yielding dairy cows with n-3 FA s supports ovarian functions and helps the embryo to survive in the adverse environment of the reproductive tract of the postpartum cow.
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Pawlak P, Malyszka N, Szczerbal I, Kolodziejski P. Fatty acid induced lipolysis influences embryo development, gene expression and lipid droplet formation in the porcine cumulus cells†. Biol Reprod 2020; 103:36-48. [PMID: 32318713 PMCID: PMC7313259 DOI: 10.1093/biolre/ioaa045] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/25/2020] [Accepted: 03/30/2020] [Indexed: 02/06/2023] Open
Abstract
The pig oocyte maturation protocol differs from other mammalian species due to dependence on follicular fluid (FF) supplementation. One of the most abundant components of the porcine follicular fluid are fatty acids (FAs). Although evidence from other mammalian models revealed a negative impact of saturated fatty acids (SFA) on developmental competence of oocytes, pig has not yet been widely analyzed. Therefore, we aimed to investigate whether supplementation of IVM medium with 150 μM of stearic acid (SA) and oleic acid (OA) affects lipid content and expression of genes related to fatty acid metabolism in porcine cumulus–oocyte complexes and parthenogenetic embryo development. We found significant influence of fatty acids on lipid metabolism in cumulus cells without affecting the oocyte proper. The expression of ACACA, SCD, PLIN2, FADS1, and FADS2 genes was upregulated (P < 0.01) in cumulus cells, while their expression in oocytes did not change. The increase in gene expression was more pronounced in the case of OA (e.g., up to 30-fold increase in PLIN2 transcript level compared to the control). The number of lipid droplets and occupied area increased significantly in the cumulus cells and did not change in oocytes after SA treatment. Oleic acid improved the blastocyst rate (48 vs 32% in control), whereas stearic acid did not affect this parameter (27%). Additionally, we have discovered a phenotypic diversity of LD in cumulus cells in response to FA supplementation, suggesting extensive lipolysis in response to SA. Stearic acid excess in maturation media led to the formation of multiple micro lipid droplets in cumulus cells.
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Affiliation(s)
- Piotr Pawlak
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan, Poland
| | - Natalia Malyszka
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan, Poland
| | - Izabela Szczerbal
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan, Poland
| | - Pawel Kolodziejski
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Poznan, Poland
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Abstract
Oocyte quality is affected by many factors, among which the environment of growth and maturation seems to be crucial. Studies show that well balanced oocyte energy metabolism has a significant impact on several elements of cytoplasmic and nuclear maturation as well as further embryo developmental competence. Therefore homeostasis between metabolism of glucose and fatty acids in the oocyte is being widely described nowadays. This review aims to discuss the follicular (in vivo) or maturation media (in vitro) environments with regard to glucose and fatty acid metabolism, as the main sources of the energy for the oocyte. A great emphasis is given on the balance between those two metabolic pathways and its further impact on female fertility.
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Affiliation(s)
- Ewelina Warzych
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan 60-637, Poland
| | - Paulina Lipinska
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan 60-637, Poland
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Abstract
Maternal age has a significant effect on oocyte developmental competence. Overall, evidence suggests that oocytes from both prepubertal females and reproductively aged females are inherently less competent. Reduced oocyte quality in both age groups is problematic for human medicine and agriculture. Some of the cellular mechanisms implicated in poor oocyte quality associated with maternal age are mitochondrial function and location, reduction of oxygen radicals, balance of metabolic pathways, regulation of maternal mRNAs and appropriate communication between the oocyte and cumulus cells. However, additional knowledge must be gained about the deficiencies present in prepubertal and reproductively aged oocytes that result in poor developmental potential before significant improvement can be achieved. This review discusses the evidence currently available regarding oocyte quality at both ends of the maternal age spectrum, what we know, or hypothesise, about the mechanisms involved and current thoughts regarding potential treatment for improvement.
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Affiliation(s)
- Rebecca L Krisher
- Colorado Center for Reproductive Medicine, 10290 RidgeGate Circle, Lone Tree, CO 80124, USA. Email
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Pawlak P, Warzych E, Cieslak A, Malyszka N, Maciejewska E, Madeja ZE, Lechniak D. The consequences of porcine IVM medium supplementation with follicular fluid become reflected in embryo quality, yield and gene expression patterns. Sci Rep 2018; 8:15306. [PMID: 30333518 PMCID: PMC6193000 DOI: 10.1038/s41598-018-33550-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 10/01/2018] [Indexed: 11/15/2022] Open
Abstract
Oocyte and embryo developmental competence are shaped by multiple extrinsic and intrinsic factors. One of the most extensive research areas in the last decade is the regulation of lipid metabolism in oocytes and embryos of different species. We hypothesized that differences in developmental competence of oocytes and embryos between prepubertal and cyclic gilts may arise due to distinct fatty acid profiles in follicular fluid. We found that supplementation of oocyte maturation media with follicular fluid from prepubertal pigs affected quality and development of embryos from prepubertal pigs while embryos of cyclic pigs were not affected. PLIN2, SCD and ACACA transcripts involved in lipid metabolism were upregulated in embryos originating from oocytes of prepubertal pigs matured with autologous follicular fluid. The surface occupied by lipid droplets tend to increase in oocytes matured with follicular fluid from prepubertal pigs regardless oocyte origin. The change into follicular fluid of cyclic pigs increased the efficiency of embryo culture and improved quality, while gene expression was similar to embryos obtained from cyclic gilts. We assume that the follicular fluids of prepubertal and cyclic pigs influenced the quality of oocytes and embryos obtained from prepubertal pigs which are more susceptible to suboptimal in vitro culture conditions.
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Affiliation(s)
- Piotr Pawlak
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland.
| | - Ewelina Warzych
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Adam Cieslak
- Department of Animal Nutrition, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Natalia Malyszka
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Eliza Maciejewska
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Zofia Eliza Madeja
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
| | - Dorota Lechniak
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637, Poznan, Poland
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Yang LL, Zhao Y, Luo SM, Ma JY, Ge ZJ, Shen W, Yin S. Toxic effects and possible mechanisms of hydrogen sulfide and/or ammonia on porcine oocyte maturation in vitro. Toxicol Lett 2017; 285:20-26. [PMID: 29292088 DOI: 10.1016/j.toxlet.2017.12.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 09/21/2017] [Revised: 12/07/2017] [Accepted: 12/22/2017] [Indexed: 02/08/2023]
Abstract
Previous studies suggest that hydrogen sulfide (H2S) and ammonia (NH3) are two major air pollutants which can cause damage to porcine health. However, the mechanisms underlying toxic effects of these compounds on porcine oocyte maturation are not clear. To clarify the mechanism, we evaluated the oocyte quality by detecting some events during oocytes maturation. In our study, porcine oocytes were cultured with different concentrations of Na2S and/or NH4Cl in vitro and the rate of the first polar body extrusion decreased significantly. Also, actin filament was seriously disrupted to damage the cytoskeleton which resulted in reduced rate of oocyte maturation. We explored the reactive oxygen species (ROS) generation and found that the ROS level was increased significantly after Na2S treatment but not after NH4Cl treatment. Moreover, early stage apoptosis rate was significantly increased and autophagy protein LC3 B expression level was higher in oocytes treated with Na2S and/or NH4Cl, which might be caused by ROS elevation. Additionally, exposure to Na2S and/or NH4Cl also caused ROS generation and early apoptosis in cumulus cells, which might further affect oocyte maturation in vitro. In summary, our data suggested that exposure to H2S and/or NH3 decreased porcine oocyte maturation in vitro, which might be caused by actin disruption, ROS generation, early apoptosis and autophagy.
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Affiliation(s)
- Lei-Lei Yang
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yong Zhao
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shi-Ming Luo
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jun-Yu Ma
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zhao-Jia Ge
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Wei Shen
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shen Yin
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, 266109, China.
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Reader KL, Stanton JAL, Juengel JL. The Role of Oocyte Organelles in Determining Developmental Competence. Biology (Basel) 2017; 6:biology6030035. [PMID: 28927010 PMCID: PMC5617923 DOI: 10.3390/biology6030035] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 09/14/2017] [Accepted: 09/14/2017] [Indexed: 02/04/2023]
Abstract
The ability of an oocyte to undergo successful cytoplasmic and nuclear maturation, fertilization and embryo development is referred to as the oocyte’s quality or developmental competence. Quality is dependent on the accumulation of organelles, metabolites and maternal RNAs during the growth and maturation of the oocyte. Various models of good and poor oocyte quality have been used to understand the essential contributors to developmental success. This review covers the current knowledge of how oocyte organelle quantity, distribution and morphology differ between good and poor quality oocytes. The models of oocyte quality are also described and their usefulness for studying the intrinsic quality of an oocyte discussed. Understanding the key critical features of cytoplasmic organelles and metabolites driving oocyte quality will lead to methods for identifying high quality oocytes and improving oocyte competence, both in vitro and in vivo.
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Affiliation(s)
- Karen L Reader
- Department of Anatomy, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Jo-Ann L Stanton
- Department of Anatomy, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Jennifer L Juengel
- Animal Reproduction, AgResearch Invermay Agricultural Centre, Private Bag 50034, Mosgiel 9053, New Zealand.
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15
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Abstract
Although it is well accepted that egg quality decreases with advanced maternal age, we do not know how it is affected at the earliest ages during the pubertal transition-likely because this young population is not typically reproducing. However, in the setting of fertility preservation, more childhood cancer patients are surviving their diagnosis due to medical advances, forcing patients and their families to consider their future fertility at a very young age. Ex vivo in vitro maturation, in which cumulus oocyte complexes harvested from ovarian tissue are cultured to obtain mature gametes, is gaining traction as a fertility preservation method that is coupled to ovarian tissue cryopreservation. This method is particularly suitable for prepubertal and young adolescent girls, although live births have not yet been reported in gametes derived from females during the pubertal transition. Importantly, the period immediately following menarche in primate species (non-human primate and human) is characterized by relative subfecundity or sterility, and data from agricultural species and humans suggest that this may in part be due to increased chromosomal abnormalities in the egg. Together these data provide a compelling rationale for pushing the age boundary of when egg quality is considered, for performing further basic research to understand egg quality during this period, and for appropriately counseling patients.
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Affiliation(s)
- Francesca E. Duncan
- Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL, United States
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16
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Sowińska N, Müller K, Niżański W, Jewgenow K. Mitochondrial characteristics in oocytes of the domestic cat (Felis catus
) after in vitro maturation and vitrification. Reprod Domest Anim 2017; 52:806-813. [DOI: 10.1111/rda.12982] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 03/16/2017] [Indexed: 11/28/2022]
Affiliation(s)
- N Sowińska
- Department of Reproduction Biology; Leibniz Institute for Zoo and Wildlife Research; Berlin Germany
- Department of Reproduction and Clinic of Farm Animals; Wroclaw University of Environmental and Life Science; Wroclaw Poland
- Center of Experimental and Innovative Medicine; University Center of Veterinary Medicine JU-AU; University of Agriculture in Krakow; Krakow Poland
| | - K Müller
- Department of Reproduction Biology; Leibniz Institute for Zoo and Wildlife Research; Berlin Germany
| | - W Niżański
- Department of Reproduction and Clinic of Farm Animals; Wroclaw University of Environmental and Life Science; Wroclaw Poland
| | - K Jewgenow
- Department of Reproduction Biology; Leibniz Institute for Zoo and Wildlife Research; Berlin Germany
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17
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Pedersen HS, Callesen H, Løvendahl P, Chen F, Nyengaard JR, Nikolaisen NK, Holm P, Hyttel P. Ultrastructure and mitochondrial numbers in pre- and postpubertal pig oocytes. Reprod Fertil Dev 2017; 28:586-98. [PMID: 25482576 DOI: 10.1071/rd14220] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 08/19/2014] [Indexed: 11/23/2022] Open
Abstract
Prepubertal pig oocytes are associated with lower developmental competence. The aim of this experiment was to conduct an exhaustive survey of oocyte ultrastructure and to use a design-unbiased stereological approach to quantify the numerical density and total number of mitochondria in oocytes with different diameters from pre- and postpubertal pigs. The ultrastructure of smaller prepubertal immature oocytes indicated active cells in close contact with cumulus cells. The postpubertal oocytes were more quiescent cell types. The small prepubertal oocytes had a lower total mitochondrial number, but no differences were observed in mitochondrial densities between groups. Mature postpubertal oocytes adhered to the following characteristics: presence of metaphase II, lack of contact between cumulus cells and oocyte, absence of rough endoplasmic reticulum and Golgi complexes, peripheral location of cortical granules and central localisation of mitochondria, vesicles and lipid droplets. Prepubertal oocytes displayed more variation. The ultrastructure of large pre- and postpubertal oocytes was compatible with higher developmental competence, whereas that of smaller prepubertal oocytes could explain their reduced capacity. The higher number of mitochondria in large pre- and postpubertal oocytes could have an influence on oocyte competence, by increasing the pool of mitochondria available for early embryonic development.
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Affiliation(s)
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Peter Løvendahl
- Department of Molecular Biology and Genetics, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Fenghua Chen
- Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - Jens Randel Nyengaard
- Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - Nanett Kvist Nikolaisen
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
| | - Peter Holm
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
| | - Poul Hyttel
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
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18
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Matsunaga R, Funahashi H. Supplementation with cumulus cell masses improves the in vitro meiotic competence of porcine cumulus-oocytes complexes derived from small follicles. Reprod Domest Anim 2017; 52:672-679. [PMID: 28370425 DOI: 10.1111/rda.12967] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 02/05/2017] [Indexed: 11/24/2022]
Abstract
The present study was conducted to examine the supplemented effect of cumulus cell masses (CCMs) derived from middle follicle (MF; 3-6 mm diameter) on the morphology and the meiotic or developmental competence of oocytes from small follicles (SF; 1-2 mm diameter). The number of cumulus cells surrounding oocytes just after collection was also lower in cumulus-oocyte complexes (COCs) from SF than MF. The ooplasmic diameter of oocytes was significantly smaller in SF-derived oocytes than MF-derived ones before and after in vitro maturation (IVM), whereas the diameter significantly increased during the culture. Co-culture of SF-derived COCs with MF-derived CCMs during IVM significantly improved the meiotic competence of the oocytes to the metaphase-II stage. Furthermore, the ooplasmic diameter of SF-derived COCs during IVM was increased to the similar size of MF-derived those in the presence of MF-derived CCMs. The abilities of oocytes to be penetrated, to form male pronuclear formation and to cleave or develop to the blastocyst stage were not affected by the co-culture with CCMs. Electrophoretic analysis of CCM secretions clearly showed the presence of more protein(s) approximately 27.6 kDa in the conditioned medium when supplemented with MF-derived CCMs. In conclusion, we demonstrate that supplementation with MF-derived CCMs improves the ooplasmic diameter and meiotic competence of SF-derived oocytes.
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Affiliation(s)
- R Matsunaga
- Department of Animal Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - H Funahashi
- Department of Animal Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
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19
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Snoeck F, Sarrazin S, Wydooghe E, Van Soom A. Age and anti-Müllerian hormone levels predict the success of in vitro maturation of cat oocytes. Reprod Domest Anim 2016; 52 Suppl 2:98-102. [DOI: 10.1111/rda.12827] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- F Snoeck
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - S Sarrazin
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - E Wydooghe
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - A Van Soom
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
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20
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Orsztynowicz M, Pawlak P, Podstawski Z, Nizanski W, Partyka A, Gotowiecka M, Kosiniak-Kamysz K, Lechniak D. Mitochondrial DNA Copy Number in Spermatozoa of Fertile Stallions. Reprod Domest Anim 2016; 51:378-85. [DOI: 10.1111/rda.12689] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/29/2016] [Indexed: 11/29/2022]
Affiliation(s)
- M Orsztynowicz
- Department of Genetics and Animal Breeding; Poznan University of Life Sciences; Poznan Poland
| | - P Pawlak
- Department of Genetics and Animal Breeding; Poznan University of Life Sciences; Poznan Poland
| | - Z Podstawski
- Department of Horse Breeding; University of Agriculture in Krakow; Krakow Poland
| | - W Nizanski
- Department of Reproduction and Clinic of Farm Animals; Wroclaw University of Environmental and Life Sciences; Wroclaw Poland
| | - A Partyka
- Department of Reproduction and Clinic of Farm Animals; Wroclaw University of Environmental and Life Sciences; Wroclaw Poland
| | - M Gotowiecka
- Department of Reproduction and Clinic of Farm Animals; Wroclaw University of Environmental and Life Sciences; Wroclaw Poland
| | - K Kosiniak-Kamysz
- Department of Horse Breeding; University of Agriculture in Krakow; Krakow Poland
| | - D Lechniak
- Department of Genetics and Animal Breeding; Poznan University of Life Sciences; Poznan Poland
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21
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Pawlak P, Chabowska A, Malyszka N, Lechniak D. Mitochondria and mitochondrial DNA in porcine oocytes and cumulus cells — A search for developmental competence marker. Mitochondrion 2016; 27:48-55. [DOI: 10.1016/j.mito.2015.12.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 11/30/2015] [Accepted: 12/14/2015] [Indexed: 12/21/2022]
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22
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Pawlak P, Warzych E, Hryciuk M, Lechniak D. Transcript abundance, glutathione and apoptosis levels differ between porcine oocytes collected from prepubertal and cyclic gilts. Theriogenology 2015; 84:86-93. [DOI: 10.1016/j.theriogenology.2015.02.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 02/11/2015] [Accepted: 02/13/2015] [Indexed: 12/18/2022]
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23
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Itami N, Shiratsuki S, Shirasuna K, Kuwayama T, Iwata H. Mitochondrial biogenesis and degradation are induced by CCCP treatment of porcine oocytes. Reproduction 2015; 150:97-104. [PMID: 25995440 DOI: 10.1530/rep-15-0037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/20/2015] [Indexed: 01/09/2023]
Abstract
In this study, we investigated the mitochondrial quality control system in porcine oocytes during meiotic maturation. Cumulus cell oocyte complexes (COCs) collected from gilt ovaries were treated with 10 μM carbonyl cyanide-m-chlorophenylhydrazone (CCCP; a mitochondrial uncoupler) for 2 h. The CCCP treatment was found to significantly reduce ATP content, increase the amount of phosphorylated AMP-activated protein kinase and elevate reactive oxygen species levels in oocytes. When the CCCP-treated COCs were cultured further for 44 h in maturation medium, the ATP levels were restored and the parthenogenetic developmental rate of oocytes to the blastocyst stage was comparable with that of untreated COCs. To examine the effects of CCCP treatment of oocytes on the kinetics of mitochondrial DNA copy number (Mt number), COCs treated with 0 or 10 μM CCCP were cultured for 44 h, after which the Mt number was determined by RT-PCR. CCCP treatment was found to increase the Mt number in the modified maturation medium in which mitochondrial degradation was inhibited by MG132, whereas CCCP treatment did not affect the Mt number in the maturation medium lacking MG132. The relative gene expression of TFAM was furthermore shown to be significantly higher in CCCP-treated oocytes than in untreated oocytes. Taken together, the finding presented here suggest that when the mitochondria are injured, mitochondrial biogenesis and degradation are induced, and that these processes may contribute to the recuperation of oocytes.
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Affiliation(s)
- N Itami
- Department of Animal ReproductionTokyo University of Agriculture, Funako 1737, Atsugi, Kanagawa, 243-0034, Japan
| | - S Shiratsuki
- Department of Animal ReproductionTokyo University of Agriculture, Funako 1737, Atsugi, Kanagawa, 243-0034, Japan
| | - K Shirasuna
- Department of Animal ReproductionTokyo University of Agriculture, Funako 1737, Atsugi, Kanagawa, 243-0034, Japan
| | - T Kuwayama
- Department of Animal ReproductionTokyo University of Agriculture, Funako 1737, Atsugi, Kanagawa, 243-0034, Japan
| | - H Iwata
- Department of Animal ReproductionTokyo University of Agriculture, Funako 1737, Atsugi, Kanagawa, 243-0034, Japan
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24
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Reader KL, Cox NR, Stanton JAL, Juengel JL. Effects of acetyl-L-carnitine on lamb oocyte blastocyst rate, ultrastructure, and mitochondrial DNA copy number. Theriogenology 2015; 83:1484-92. [PMID: 25748246 DOI: 10.1016/j.theriogenology.2015.01.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 07/28/2014] [Revised: 01/20/2015] [Accepted: 01/24/2015] [Indexed: 01/01/2023]
Abstract
Viable lambs can be produced after transfer of in vitro-derived embryos from oocytes harvested from prepubertal lambs. However, this occurs at a much lower efficiency than from adult ewe oocyte donors. The reduced competence of prepubertal oocytes is believed to be due, at least in part, to deficiencies in cytoplasmic maturation. Differences in the cytoplasmic ultrastructure between prepubertal and adult oocytes have been described in the sheep, pig, and cow. Prepubertal lamb oocytes have been shown to have a different distribution of mitochondria and lipid droplets, and less mitochondria and storage vesicles than their adult counterparts. L-carnitine plays a role in supplying energy to the cell by transporting long-chain fatty acids into mitochondria for β-oxidation to produce ATP. Both L-carnitine and its derivative acetyl-L-carnitine have been reported to increase the blastocyst rate of oocytes from mice, cows, and pigs, treated during IVM. L-carnitine has also been shown to increase mitochondrial biogenesis in adipose cells. Therefore, the aims of this study were to determine if treatment of oocytes from prepubertal lambs with acetyl-L-carnitine during IVM could increase the blastocyst rate and alter mitochondria, vesicle, or lipid droplet number, volume, or distribution. The blastocyst rate was doubled in prepubertal lamb oocytes treated with acetyl-L-carnitine when compared to untreated oocytes (10.0% and 4.6%, respectively; P = 0.028). Light microscopy, scanning electron microscopy, and stereology techniques were used to quantify organelles in untreated and acetyl-L-carnitine-treated lamb oocytes, and quantitative polymerase chain reaction methods were used to measure the mitochondrial DNA copy number. There were no differences in mitochondrial volume, number, or mitochondrial DNA copy number. Acetyl-L-carnitine treatment increased the cytoplasmic volume (P = 0.015) of the oocytes, and there were trends toward an increase in the vesicle volume (P = 0.089) and an altered distribution of lipid droplets (P = 0.076). In conclusion, acetyl-L-carnitine can be used to increase the in vitro blastocyst rate of juvenile oocytes and therefore to improve juvenile in vitro embryo transfer methods. These methods can be used for livestock improvement by increasing the rate of genetic gain. Further work is required to identify the contents of the vesicles and confirm the mode of action of acetyl-L-carnitine in improving oocyte competence.
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Affiliation(s)
- Karen L Reader
- Department of Anatomy, University of Otago, Dunedin, New Zealand; Animal Productivity, AgResearch, Invermay Agricultural Centre, Mosgiel, New Zealand.
| | - Neil R Cox
- Bioinformatics and Statistics, AgResearch, Invermay Agricultural Centre, Mosgiel, New Zealand
| | - Jo-Ann L Stanton
- Department of Anatomy, University of Otago, Dunedin, New Zealand
| | - Jennifer L Juengel
- Animal Productivity, AgResearch, Invermay Agricultural Centre, Mosgiel, New Zealand
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25
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Dell'Aquila ME, Bogliolo L, Russo R, Martino NA, Filioli Uranio M, Ariu F, Amati F, Sardanelli AM, Linsalata V, Ferruzzi MG, Cardinali A, Minervini F. 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 Res Int 2014; 2014:878062. [PMID: 24719893 DOI: 10.1155/2014/878062] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [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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26
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Pawlak P, Warzych E, Chabowska A, Lechniak D. Differences in cytoplasmic maturation between the BCB+ and control porcine oocytes do not justify application of the BCB test for a standard IVM protocol. J Reprod Dev 2013; 60:28-36. [PMID: 24284835 PMCID: PMC3963294 DOI: 10.1262/jrd.2013-092] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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] [Indexed: 01/06/2023] Open
Abstract
The Brilliant Cresyl Blue (BCB) test relies on G6PDH activity and a simple protocol for
the selection of higher quality oocytes. Although the BCB+ oocytes of all the species that
have been investigated are characterized by superior quality when compared to BCB-
counterparts, application of the test for embryo production still remains an open issue.
The aim of our study was to compare BCB+ and the control oocytes (not subjected to the BCB
test) in terms of selected aspects of cytoplasmic maturation (mtDNA copy number,
mitochondria distribution, relative transcript abundance of six marker genes). The results
of our study revealed more relevant differences within the BCB+ and the control oocytes
(before and after IVM) than between the two categories of oocytes. There was no difference
in the transcript abundance of the BCB+ and the control oocytes in 5 out of 6 analyzed
genes (BMP15, GDF9, ATP5A1,
EEF1A, ZAR1) and in mtDNA content (pre-IVM 179609
vs. 176595 and post-IVM 187243 vs. 246984,
respectively). With regard to mitochondria distribution in pre- and post-IVM oocytes,
there was nonsignificant tendency for a more frequent occurrence of the expected patterns
in the BCB+ group. The results of the present study do not support the application of BCB
staining in a routine IVM protocol due to relatively high similarity in selected
parameters characterizing cytoplasmic maturation of BCB+ and control oocytes. This high
similarity may results from the limited amount of less competent BCB- oocytes (10%) still
present among nonselected oocytes of proper morphology.
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Affiliation(s)
- Piotr Pawlak
- Department of Genetics And Animal Breeding, Poznan University of Life Sciences, 60-637 Poznan, Poland
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27
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Kohata C, Izquierdo-Rico MJ, Romar R, Funahashi H. Development competence and relative transcript abundance of oocytes derived from small and medium follicles of prepubertal gilts. Theriogenology 2013; 80:970-8. [PMID: 23987988 DOI: 10.1016/j.theriogenology.2013.07.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 08/23/2012] [Revised: 07/14/2013] [Accepted: 07/15/2013] [Indexed: 11/29/2022]
Abstract
The objective of this study was to examine the competence of mature oocytes aspirated from small follicles (SF, <2 mm in diameter) and medium follicles (MF, 3-6 mm) of abattoir-derived prepubertal gilt ovaries. Oocytes were selected by the presence of the first polar body (1pb) after IVM in a chemically defined medium, for sperm penetration, pronuclear formation, cleavage rate, and development to the blastocyst stage. Relative transcript abundance of genes associated with regulation of oocyte maturation (AURKA, AURKB, and MOS), fertilization (ZP3 and ZP4), maternal effect (NALP9 and HSF1), and anti-apoptosis (BCL2) were also examined in oocytes at germinal vesicle (GV) and metaphase-II (MII) stages. In SF, compared with MF, the maturation rate post-IVM was lower (P < 0.05), but there were no differences in sperm penetration rate (78.2% and 68.5% at 6 hours after insemination and 90.8% and 91.9% at 9 hours after insemination, P = 0.51 and P = 0.67, respectively), the percentage of oocytes that formed both female and male pronuclei (27.9% and 25.8% at 6 hours after insemination and 79.4% and 76.1% at 9 hours after insemination), or cleavage rate at 48 hours after insemination (85.9% and 89.7%, respectively, P = 0.46), whereas blastocyst formation rate was lower (P < 0.05) in oocytes from SF versus MF (14.7% and 31.0%). Transcript abundances decreased (P < 0.05) in all genes examined between the GV and MII stages, although only transcript abundance for MOS was lower (P < 0.05) in GV oocytes from SF versus MF. In conclusion, mature oocytes from SF and MF of prepubertal gilts with a visible 1pb had similar fertilizability in vitro and relative transcript abundance of nine genes. However, follicle size affected meiotic competence, early embryonic development to the blastocyst stage, and transcript abundance of the MOS gene.
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Affiliation(s)
- Chiyuki Kohata
- Department of Animal Science, Graduate School of Natural Science and Technology, Okayama University, Tsushima-Naka, Kita-Ku, Okayama, Japan
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