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Barcelos SM, Rosa PMDS, Moura ABB, Villarroel CLP, Bridi A, Bispo ECI, Garcez EM, Oliveira GDS, Almeida MA, Malard PF, Peixer MAS, Pereira RW, de Alencar SA, Saldanha-Araujo F, Dallago BSL, da Silveira JC, Perecin F, Pogue R, Carvalho JL. Extracellular vesicles derived from bovine adipose-derived mesenchymal stromal cells enhance in vitro embryo production from lesioned ovaries. Cytotherapy 2024:S1465-3249(24)00722-9. [PMID: 38904584 DOI: 10.1016/j.jcyt.2024.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/15/2024] [Accepted: 05/15/2024] [Indexed: 06/22/2024]
Abstract
BACKGROUND AND AIMS Ovum pick-up (OPU) is an intrinsic step of in vitro fertilization procedures. Nevertheless, it can cause ovarian lesions and compromise female fertility in bovines. Recently, we have shown that intraovarian injection of adipose-derived mesenchymal stromal cells (AD-MSCs) effectively preserves ovarian function in bovines. Given that MSC-derived extracellular vesicles (MSC-EVs) have been shown to recapitulate several therapeutic effects attributed to AD-MSCs and that they present logistic and regulatory advantages compared to AD-MSCs, we tested whether MSC-EVs would also be useful to treat OPU-induced lesions. METHODS MSC-EVs were isolated from the secretome of bovine AD-MSCs, using ultrafiltration (UF) and ultracentrifugation methods. The MSC-EVs were characterized according to concentration and mean particle size, morphology, protein concentration and EV markers, miRNA, mRNA, long noncoding RNA profile, total RNA yield and potential for induction of the proliferation and migration of bovine ovarian stromal cells. We then investigated whether intraovarian injection of MSC-EVs obtained by UF would reduce the negative effects of acute OPU-induced ovarian lesions in bovines. To do so, 20 animals were divided into 4 experimental groups (n = 5), submitted to 4 OPU cycles and different experimental treatments including vehicle only (G1), MSC-EVs produced by 7.5 × 106 AD-MSCs (G2), MSC-EVs produced by 2.5 × 106 AD-MSCs (G3) or 3 doses of MSC-EVs produced by 2.5 × 106 AD-MSCs, injected after OPU sessions 1, 2 and 3 (G4). RESULTS Characterization of the MSC-EVs revealed that the size of the particles was similar in the different isolation methods; however, the UF method generated a greater MSC-EV yield. MSC-EVs processed by both methods demonstrated a similar ability to promote cell migration and proliferation in ovarian stromal cells. Considering the higher yield and lower complexity of the UF method, UF-MSC-EVs were used in the in vivo experiment. We evaluated three therapeutic regimens for cows subjected to OPU, noting that the group treated with three MSC-EV injections (G4) maintained oocyte production and increased in vitro embryo production, compared to G1, which presented compromised embryo production following the OPU-induced lesions. CONCLUSIONS MSC-EVs have beneficial effects both on the migration and proliferation of ovarian stromal cells and on the fertility of bovines with follicular puncture injury in vivo.
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Affiliation(s)
- Stefhani Martins Barcelos
- Multidisciplinary Laboratory of Biosciences, Faculty of Medicine, University of Brasilia, Brasilia, DF, Brazil; Genomic Sciences and Biotechnology Program, Catholic University of Brasilia, Brasília, DF, Brazil
| | - Paola Maria da Silva Rosa
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | - Ana Beatriz Bossois Moura
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | | | - Alessandra Bridi
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | | | - Emãnuella Melgaço Garcez
- Genomic Sciences and Biotechnology Program, Catholic University of Brasilia, Brasília, DF, Brazil
| | | | - Maria Alice Almeida
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | | | | | | | - Sérgio Amorim de Alencar
- Genomic Sciences and Biotechnology Program, Catholic University of Brasilia, Brasília, DF, Brazil
| | - Felipe Saldanha-Araujo
- Department of Pharmacy, Faculty of Health Sciences, University of Brasilia, Brasilia, DF, Brazil
| | - Bruno Stéfano Lima Dallago
- Multidisciplinary Laboratory of Biosciences, Faculty of Medicine, University of Brasilia, Brasilia, DF, Brazil
| | - Juliano Coelho da Silveira
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | - Felipe Perecin
- Department of Veterinary Medicine, Faculty of Animal Sciences and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil
| | - Robert Pogue
- Genomic Sciences and Biotechnology Program, Catholic University of Brasilia, Brasília, DF, Brazil
| | - Juliana Lott Carvalho
- Multidisciplinary Laboratory of Biosciences, Faculty of Medicine, University of Brasilia, Brasilia, DF, Brazil; Genomic Sciences and Biotechnology Program, Catholic University of Brasilia, Brasília, DF, Brazil.
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Cattle breed affects in vitro embryo production in a large-scale commercial program on dairy farms. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Malard PF, Peixer MAS, Grazia JG, Brunel HDSS, Feres LF, Villarroel CL, Siqueira LGB, Dode MAN, Pogue R, Viana JHM, Carvalho JL. Intraovarian injection of mesenchymal stem cells improves oocyte yield and in vitro embryo production in a bovine model of fertility loss. Sci Rep 2020; 10:8018. [PMID: 32415089 PMCID: PMC7229041 DOI: 10.1038/s41598-020-64810-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/14/2020] [Indexed: 12/17/2022] Open
Abstract
Valuable female cattle are continuously subject to follicular puncture (ovum pick-up - OPU). This technique is commonly used for in-vitro embryo production, but may result in ovarian lesion. Mesenchymal stem cells (MSC) ameliorate the function of injured tissues, but their use to treat ovarian lesions in cattle has not been established. We investigated whether a local injection of MSC would reduce the negative effects of repeated OPU under acute and chronic scenarios in bovines. First, we performed four OPU sessions and injected 2.5 × 106 MSCs immediately after the 4th OPU procedure (n = 5). The treated organs (right ovary) were compared to their saline-treated counterparts (left), and presented superior production of oocytes and embryos in the three following OPU sessions (P < 0.05). Then, cows with progressive fertility loss went through three OPU sessions. Animals received MSC, saline, or MSC + FSH in both ovaries after the first OPU. In the two following OPU sessions, the MSC and MSC + FSH - treated groups failed to present any significant alteration in the number of oocytes and embryos compared to saline-treated animals. Thus, MSC have beneficial effects on the fertility of OPU-lesioned cows, but not in cows with cystic ovarian disease and chronic ovarian lesions.
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Affiliation(s)
- Patricia F Malard
- Universidade Católica de Brasília, Brasília, DF, 70790-160, Brazil.
- Bio Biotecnologia da Reprodução Animal, Brasília, DF, 71735-505, Brazil.
| | - Mauricio A S Peixer
- Universidade Católica de Brasília, Brasília, DF, 70790-160, Brazil
- Bio Biotecnologia da Reprodução Animal, Brasília, DF, 71735-505, Brazil
| | - Joao G Grazia
- Cenatte Embrioes, Pedro Leopoldo, MG, 33600-000, Brazil
| | | | - Luiz F Feres
- Universidade de Alfenas, Alfenas, MG, 37132-440, Brazil
| | | | - Luiz G B Siqueira
- Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA Gado de Leite, Juiz de Fora, MG, 36038-330, Brazil
| | - Margot A N Dode
- Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil
| | - Robert Pogue
- Universidade Católica de Brasília, Brasília, DF, 70790-160, Brazil
| | - Joao Henrique M Viana
- Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA Recursos Genéticos e Biotecnologia, Brasília, DF, 70770-917, Brazil
| | - Juliana L Carvalho
- Universidade Católica de Brasília, Brasília, DF, 70790-160, Brazil.
- Universidade de Brasília, Brasília, DF, 70910-900, Brazil.
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Follicular Stimulation and Laparoscopic Ovum Pick-up (LOPU) in Repeatedly Superovulated Korean Black Goats. JOURNAL OF ANIMAL REPRODUCTION AND BIOTECHNOLOGY 2014. [DOI: 10.12750/jet.2014.29.1.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Cordeiro M, Teixeira P, Oliveira M, Filippo PD, Dias D, Beretta C, Dória R, Feliciano M, Coutinho L, Vicente W. Reproductive efficiency of adult and prepubertal goats subjected to repeated follicular aspiration. ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/s0102-09352014000100020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The objective of this study was to assess the reproductive response of adult and prepubertal goats subjected to repeated laparoscopic ovum pick-up (LOPU). The study animals were divided into two groups, specifically, adult nanny goats (GA, n=10) and prepubertal nanny goats (GP, n=10), which were subjected to estrous synchronization and ovarian stimulation for LOPU. Both groups underwent six LOPU procedures at seven-day intervals and were subsequently subjected to controlled mating and pregnancy diagnosis to evaluate their future fertility. The study showed a reduction in the number of follicles visualized and in the amount and quality of the oocytes that were recovered and exposed to in vitro maturation. As indicated by the fertility test, however, no complications were found during the laparoscopic procedures that would impair the reproductive future of the animals. Therefore, a viable number of oocytes were obtained even with the decreased reproductive efficiency, proving that repeated LOPUs do not interfere with the reproductive of adult and prepubertal nanny goats. These results indicate a positive aspect of this procedure, allowing for increasing reproductive performance of this kind, when used for the production in vitro.
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Teixeira PPM, Padilha LC, Oliveira MEF, Motheo TF, da Silva ASL, Barros FFPC, Coutinho LN, Flôres FN, Lopes MCS, Bandarra MB, Silva MAM, Vasconcelos RO, Rodrigues LFS, Vicente WRR. Laparoscopic ovum collection in sheep: gross and microscopic evaluation of the ovary and influence on ooctye production. Anim Reprod Sci 2011; 127:169-75. [PMID: 21907507 DOI: 10.1016/j.anireprosci.2011.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 07/01/2011] [Accepted: 08/03/2011] [Indexed: 10/17/2022]
Abstract
Gross and microscopic evaluations of the ovaries of sheep subjected to successive ovum collection were performed with the objective of identifying if there was interference in oocyte production and morphology of gonads. Gross evaluation of the internal genital tract was also performed. Eighteen ewes of the Santa Inês breed were randomly distributed into three experimental groups of six animals each; G0, G1 and G9 with no, one and nine repetitions, respectively. Estrous synchronization was achieved with a short protocol using MAP followed by single dose stimulation with 80mg of FSHp and 300 IU of eCG (IM). Laparoscopic ovum pick-up was performed 36h later, with 7-day intervals. The number of visualized follicles, aspirated follicles and oocytes recovery was recorded. After the last intervention, ovariectomy was performed for evaluation of gross and microscopical appearance and existence of lesions caused by follicular puncture, which were classified as absent (0), mild (1), moderate (2) and severe (3). The number of visualized follicles, aspirated follicles and oocytes recovery were 13.2±2.0, 11.3±3.0 and 5.8±2.3, respectively, with a recovery rate of 51.7%. No statistical difference was found between the nine sessions (P>0.05). Nine sessions of superovulation and ovum collection procedures did not cause ovarian lesions and did not interfere with the production of follicles in ewes of the Santa Inês breed.
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Affiliation(s)
- P P M Teixeira
- Universidade Estadual Paulista (FCAV/UNESP), Jaboticabal, São Paulo, Brazil.
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Effects of eCG and FSH on ovarian response, recovery rate and number and quality of oocytes obtained by ovum pick-up in Holstein cows. Anim Reprod Sci 2008; 106:208-14. [DOI: 10.1016/j.anireprosci.2008.01.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2007] [Revised: 12/28/2007] [Accepted: 01/14/2008] [Indexed: 11/24/2022]
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8
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Li F, Chen X, Pi W, Liu C, Shi Z. Collection of Oocytes Through Transvaginal Ovum Pick-up for In Vitro Embryo Production in Nanyang Yellow Cattle. Reprod Domest Anim 2007; 42:666-70. [DOI: 10.1111/j.1439-0531.2006.00842.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Lopes AS, Martinussen T, Greve T, Callesen H. Effect of Days Post-Partum, Breed and Ovum Pick-Up Scheme on Bovine Oocyte Recovery and Embryo Development. Reprod Domest Anim 2006; 41:196-203. [PMID: 16689881 DOI: 10.1111/j.1439-0531.2006.00683.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The objective of this study was to investigate (i) the effect of two different ovum pick-up (OPU) schemes (once vs twice weekly aspirations) on oocyte recovery rate, quality and subsequent in vitro embryo development, (ii) the influence of days post-partum on oocyte recovery and (iii) possible differences in OPU results from two different herds. In group A, OPU was performed twice weekly in two Holstein Friesian (HF) and three Danish Red and White (DRW) cows from a private herd. In the research herd, two groups of eight HF cows were investigated: group B (OPU once weekly) and group C (OPU twice weekly). The collected oocytes were subsequently submitted to in vitro embryo production. More oocytes were recovered from the private herd when compared with the research herd. In the research herd, the twice weekly scheme aspirated more oocytes than the once weekly scheme. The quality of the retrieved oocytes was significantly different between groups B and C but not between groups A and C, and HF cows yielded higher quality oocytes than DRW cows (p = 0.029). Oocytes from group C showed higher level of embryonic development than group B oocytes. No differences in blastocyst rates were observed between groups A and C. Session affected the number of retrieved oocytes and subsequent developmental rates, with these being lower in the first compared with the last sessions. Finally, there was no significant effect of days post-partum in the number and quality of the retrieved oocytes, likely because of the small group size and high variation between sessions.
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Affiliation(s)
- A S Lopes
- Department of Genetics and Biotechnology, Danish Institute of Agricultural Sciences, Tjele, Denmark.
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McEvoy TG, Alink FM, Moreira VC, Watt RG, Powell KA. Embryo technologies and animal health – consequences for the animal following ovum pick-up, in vitro embryo production and somatic cell nuclear transfer. Theriogenology 2006; 65:926-42. [PMID: 16280157 DOI: 10.1016/j.theriogenology.2005.09.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Mammalian reproductive technologies that aim either to complement or to transcend conventional livestock breeding options have contributed to some of the most remarkable achievements in the field of reproductive biology in recent decades. In so doing they have extended our horizons in two distinct dimensions, the first concerning what it is technically possible to achieve and the second relating to the time-frame within which an individual's life-long developmental capability is initially established and ultimately realized or undermined. Our impressions of the benefits and values, or otherwise, of technologies such as in vitro embryo production and nuclear transfer are rightly influenced by the extent to which they impinge on the health of animals either subjected to or derived from them. Here, we consider some of the health implications of oocyte/embryo-centric technologies applied to farm livestock.
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Affiliation(s)
- T G McEvoy
- Scottish Agricultural College, Ferguson Building, Sustainable Livestock Systems Group, Craibstone Estate, Bucksburn, Aberdeen, Scotland, UK.
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Gupta V, Manik RS, Chauhan MS, Singla SK, Akshey YS, Palta P. Repeated ultrasound-guided transvaginal oocyte retrieval from cyclic Murrah buffaloes (Bubalus bubalis): Oocyte recovery and quality. Anim Reprod Sci 2006; 91:89-96. [PMID: 15913926 DOI: 10.1016/j.anireprosci.2005.01.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2004] [Revised: 01/25/2005] [Accepted: 01/25/2005] [Indexed: 10/25/2022]
Abstract
The present study was undertaken to explore the potential of the Murrah breed of buffaloes as donors of oocytes and to find out the recovery rate and oocyte quality in cyclic Murrah buffaloes subjected to oocyte recovery once a week. Murrah buffaloes (n = 5) were synchronized for estrus by a single prostaglandin injection schedule. The animals were subjected to transvaginal oocyte retrieval (TVOR) once weekly for 6 weeks, starting from Day 7 of the oestrous cycle (Day 0 = day of oestrus). TVOR was performed using an ultrasound machine with a 5 MHz transvaginal transducer, single lumen 19-gauge, 60 cm long needle and a constant vacuum pressure of 50 mmHg. The number and size of follicles in each ovary was determined before puncture. The follicles were characterized on the basis of their diameter as small (3-5 mm), medium (6-9 mm) and large (> or = 10 mm). The oocytes recovered were classified as grade A, cumulus-oocytes complexes (COCs) with > or = 5 layers of cumulus cells; grade B, those with two to four layers; grade C, partially denuded oocytes; and grade D, completely denuded oocytes. The mean (+/- S.E.M) number of small, medium and large follicles, and the number of total follicles observed per animal per session, which was 2.2 +/- 0.3, 0.6 +/- 0.2, 0.9 +/- 0.1 and 3.7 +/- 0.3, respectively, did not differ between animals or between puncture sessions. Small follicles constituted a major proportion (59%) of the total observed follicles. A mean (+/- S.E.M) number of 3.0 +/- 0.3 follicles were punctured and 2.0 +/- 0.3 oocytes recovered per animal per session, with a recovery rate of 68%. Out of the total 61 oocytes recovered, 36 (59%) were of grades A + B whereas 25 (41%) were of grades C + D. In conclusion, this study describes the potential of cyclic Murrah buffaloes as donors of oocytes collected by repeated TVOR once a week, without any adverse effects on follicular growth and oocyte recovery. It also describes an efficient system for carrying out TVOR in buffaloes.
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Affiliation(s)
- V Gupta
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana 132001, India
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Abstract
Laparoscopic surgery is minimally invasive and minimally traumatic in cattle. It allows the animal to return rapidly to production. These techniques are destined to develop further, especially in the dairy and show cattle industries, where recovery periods must be as short as possible. Although it is important to remain skeptical about new procedures if they do not offer advantages over open techniques, in many cases laparoscopy is clearly superior. Laparoscopy is not an easy surgical technique. It requires a good knowledge of anatomy and abdominal topography and rigorous training. It must be performed with great care and delicacy because complications, such as perforated organs, can occur. Laparoscopy also requires the use of sophisticated and costly technology.
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Affiliation(s)
- Ludovic Bouré
- Large Animal Surgery, Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada.
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Bols PEJ, Leroy JLMR, Vanholder T, Van Soom A. A comparison of a mechanical sector and a linear array transducer for ultrasound-guided transvaginal oocyte retrieval (OPU) in the cow. Theriogenology 2004; 62:906-14. [PMID: 15251242 DOI: 10.1016/j.theriogenology.2003.12.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2003] [Revised: 10/06/2003] [Accepted: 12/14/2003] [Indexed: 10/26/2022]
Abstract
A comparison was made between a linear array and a mechanical multiple angle sector (MAP) transducer for ultrasound-guided transvaginal oocyte retrieval (ovum pick-up, OPU) in the cow. The ovaries of five dairy cows were punctured, in a twice-weekly OPU program lasting for 4 weeks, using two different 5.0-MHz transducers equipped with an identical disposable needle-guidance system. Both ovaries were visualized using each transducer before puncture and the number of follicles with a diameter of less than 5 mm (small) and with a diameter equal to or greater than 5 mm (large) was recorded. Subsequently, one ovary of the pair was punctured guided by the MAP, while the other was punctured using the linear array transducer. During the next puncture session on a given animal, the two systems were switched and used on the alternate ovary in a crossover design. Parameters assessed for each system were: the total number of follicles visualized in each diameter class, and the total number of retrieved oocytes per cow. A significant difference was found for the ability to visualize smaller follicles in favor of the MAP transducer, with an average visualization of 71.6 +/- 30.3 small follicles per cow during the 4-week trial period, compared to 59.8 +/- 25.7 for the linear array transducer (t-test for paired samples, P = 0.007). No differences were found in the visualization of large follicles. A numerically greater number of oocytes were retrieved using the MAP transducer, compared to the linear array, (averages of 14.2 +/- 7.2 versus 7.4 +/- 6.1, respectively), although these differences were not statistically significant. In conclusion, both systems can be effectively used for oocyte retrieval in the cow, however, the MAP transducer demonstrated superior visualization of small follicles.
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Affiliation(s)
- P E J Bols
- Laboratory of Veterinary Physiology, Faculty of Farmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1, Gebouw U, 2610 Wilrijk, Belgium.
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Viana JHM, De Almeida Camargo LS, De Moraes Ferreira A, De Sa WF, De Carvalho Fernandes CA, De Pinho Marques Junior A. Short intervals between ultrasonographically guided follicle aspiration improve oocyte quality but do not prevent establishment of dominant follicles in the Gir breed (Bos indicus) of cattle. Anim Reprod Sci 2004; 84:1-12. [PMID: 15302383 DOI: 10.1016/j.anireprosci.2003.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2003] [Revised: 11/13/2003] [Accepted: 12/09/2003] [Indexed: 11/19/2022]
Abstract
The aim of the present study was to evaluate oocyte recovery and embryo yield using two different ovarian follicular aspiration schedules in donor cows of the Gir breed. Pluriparous, non-lactating Gir cows (n = 14) were randomly allocated to one of two groups, one of which had aspirations of ovarian follicular contents conducted once a week (TVFA-1x) and the other twice weekly (TVFA-2x), for nine consecutive weeks. Before follicle aspiration, follicular population was recorded in three classes according to size (> 6 mm, 6-9 mm and > 9 mm). The cumulus-oocyte complexes (COCs) recovered were identified, morphologically classified and in vitro matured, fertilized with Gir sperm and cultured in CR2 medium for 7 days. There was no difference (P > 0.05) in the size of the largest follicle, number of follicles identified or follicular content aspirations between TVFA-1x and TVFA-2x groups. Large follicles (> 9 mm) were observed for all the aspiration intervals considered (3, 4 or 7 days). More oocytes were recovered per session in TVFA-1x as compared with TVFA-2x (8.9 +/- 0.8 versus 7.0 +/- 0.7, P < 0.01), resulting in a greater recovery rate in this group (74.3% versus 58.7%, P < 0.01). More COCs of Grade I were recovered from TVFA-2x (22.6% versus 13.3%, P < 0.01). There was no difference in cleavage rate between groups, but the percentage of embryos that reached the blastocyst stage was greater in TVFA-2x as compared with the TVFA-1x (31.8% versus 21.6%, P < 0.01). The greater in vitro performance qualities of TVFA-2x oocytes compensates for the greater oocyte recovery rate in TVFA-1x, demonstrating a greater embryo production potential. Despite showing uncommon follicular dynamics characteristics when subjected to follicular aspiration, Gir cows can be successfully used as oocyte donors for in vitro embryo production.
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Viana JHM, Nascimento AA, Pinheiro NL, Ferreira AM, Camargo LS, Sá WF, Marques Júnior AP. Caracterização de seqüelas subseqüentes à punção folicular em bovinos. PESQUISA VETERINARIA BRASILEIRA 2003. [DOI: 10.1590/s0100-736x2003000300004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Objetivaram-se avaliar lesões no trato genital em animais utilizados como doadores de oócitos. Foram examinadas vacas da raça Gir (n=20) que participaram de diferentes experimentos envolvendo a técnica de punção folicular. Ao término de cada período experimental, os animais foram examinados por palpação retal, ultra-sonografia e vaginoscopia. Um grupo de vacas (n=8) foi selecionado para a caracterização histopatológica das lesões ovarianas. Os ovários foram retirados cirurgicamente, fixados e processados, e as lâminas obtidas coradas e analisadas. Foram avaliados animais submetidos a entre nove e 42 sessões de punção, e que produziram entre 10 e 719 oócitos. Observou-se uma baixa prevalência (5,26%) de processos inflamatórios na mucosa do fundo de saco vaginal. A ocorrência de aderências apresentou uma correlação positiva com o número de sessões de punção a que o animal foi submetido (r=0,31; P<0,05), mas não com o total de oócitos recuperados (r=0,03; P>0,05). Tendência oposta foi observada em relação à fibrose ovariana, que apresentou uma alta correlação com o número de oócitos recuperados (r=0,53; P<0,05). A avaliação histopatológica demonstrou a presença de tecido cicatricial, infiltrados de células inflamatórias e presença de tecido luteal disperso no estroma ovariano.
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McEvoy TG, Thompson H, Dolman DF, Watt RG, Reis A, Staines ME. Effects of epidural injections and transvaginal aspiration of ovarian follicles in heifers used repeatedly for ultrasound-guided retrieval of ova and embryo production. Vet Rec 2002; 151:653-8. [PMID: 12498407 DOI: 10.1136/vr.151.22.653] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Postmortem examinations of 13 Simmental heifers that had received between 16 and 28 injections to induce caudal epidural anaesthesia, the last not less than seven months before they were slaughtered, showed that none of them had any evidence of infection or inflammation at the injection site or in adjacent bone and soft tissues. Seven of them had minor damage to intercoccygeal discs, consisting of discospondylosis with neovascularisation and chondroid metaplasia, consistent with injuries caused by needles. The severity of the damage was not related to the number of epidural injections received, suggesting that the damage was probably caused by a discrete suboptimal injection procedure. In a second study, the ovaries from 22 Simmental heifers that had undergone between 13 and 16 transvaginal follicular aspirations were examined postmortem. Approximately one-third of them had a natural texture with little or no evidence of scar tissue, and less than one in five had extensive scarring and a toughened texture. There was no evidence of compromised ovarian function, as determined by the number and normality of corpora lutea and large follicles, in any of the animals.
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Affiliation(s)
- T G McEvoy
- Scottish Agricultural College, Animal Biology Division, Craibstone Estate, Bucksburn, Aberdeen AB21 9YA
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Reis A, Staines ME, Watt RG, Dolman DF, McEvoy TG. Embryo production using defined oocyte maturation and zygote culture media following repeated ovum pick-up (OPU) from FSH-stimulated Simmental heifers. Anim Reprod Sci 2002; 72:137-51. [PMID: 12137977 DOI: 10.1016/s0378-4320(02)00075-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To determine whether differences in ovarian follicle populations and endocrine status at ovum pick-up (OPU) influenced the quality and developmental competence of oocyte-cumulus complexes (OCC's) collected from follicle stimulating hormone (FSH)-stimulated donors, 24 Simmental heifers had their ovarian follicles aspirated via transvaginal ultrasound-guided OPU at both 15 (OPU1) and 21 (OPU2) days following a synchronised oestrus, on four consecutive occasions at 15-week intervals. More OCC's were collected during OPU1 than OPU2 (means +/- S.E.M. = 7.2 +/- 0.47 versus 5.7 +/- 0.44; P = 0.01), but the respective percentages that were of good quality (categories 1 and 2) did not differ significantly (55 +/- 3% versus 47 +/- 3%). The incidence of zygote cleavage following OCC maturation (Medium 199; protein-free), in vitro fertilization (mTALP; including 0.6% (w/v) albumin) and culture (modified SOF; protein-free) was not significantly different (mean +/- S.E.M. = 81 +/- 2% and 71 +/- 7% for OPU1 and OPU2, respectively). Corresponding blastocyst yields from good quality OCC's (24 +/- 3% and 26 +/- 4%) also did not differ. Although the same 3-day FSH regimen was used immediately prior to each OPU session, plasma FSH concentrations were consistently lower at OPU1 than OPU2 (1.3 +/- 0.28 ng/ml versus 2.5 +/- 0.45 ng/ml; P < 0.05). In contrast, plasma progesterone concentrations were higher at OPU1 (6.6 +/- 0.48 ng/ml versus 3.9 +/- 0.53 ng/ml; P < 0.001), with concentrations at OPU2 being consistent with the presence of luteal tissues, including both persistent corpora lutea and luteinised follicle remnants following OPU1. Failure of the significant differences in follicular and endocrine status between OPU1 and OPU2 to alter the developmental competence of OCC's suggests that, probably as a result of its stabilising influence on nutritionally-sensitive intraovarian regulators of oocyte competence, the constant feeding regimen had a more profound effect on oocyte quality than observed shifts in the peripheral concentrations of some reproductive hormones. Finally, the study demonstrates that it is possible to generate acceptable numbers of in vitro blastocyst-stage embryos from high genetic merit heifers using strategies which restrict reliance on protein to the in vitro fertilization stage of the production process.
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Affiliation(s)
- A Reis
- Animal Biology Division, Scottish Agricultural College, Craibstone Estate, Bucksburn, Aberdeen AB21 9YA, UK
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Brüggerhoff K, Zakhartchenko V, Wenigerkind H, Reichenbach HD, Prelle K, Schernthaner W, Alberio R, Küchenhoff H, Stojkovic M, Brem G, Hiendleder S, Wolf E. Bovine somatic cell nuclear transfer using recipient oocytes recovered by ovum pick-up: effect of maternal lineage of oocyte donors. Biol Reprod 2002; 66:367-73. [PMID: 11804950 DOI: 10.1095/biolreprod66.2.367] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The efficiency of bovine nuclear transfer using recipient oocytes recovered by ultrasound-guided follicle aspiration (ovum pick-up [OPU]) was investigated. Oocyte donors were selected from 2 distinct maternal lineages (A and B) differing in 11 nucleotide positions of the mitochondrial DNA control region. A total of 1342 cumulus-oocyte complexes (COCs) were recovered. The numbers of total COCs and class I/II COCs recovered from donors of lineage A were higher (P < 0.001) than those obtained from lineage B. Follicle aspiration once per week yielded a higher (P < 0.001) total number of COCs per session than aspiration twice per week, whereas the reproduction status of donors (heifer vs. cow) had no effect on OPU results. Of the 1342 oocytes recovered, 733 (55%) were successfully matured in vitro and used for nuclear transfer. Fusion was achieved in 550 (75%) karyoplast-cytoplast complexes (KCCs), resulting in 277 (50%) cleaved embryos on Day 3. On Day 7 of culture, 84 transferable embryos (15% based on fused KCCs) were obtained. After 38 transfers (10 single, 22 double, and 6 triple transfers), 9 recipients (8 double and 1 triple transfer) were diagnosed as pregnant on Day 28, corresponding to a pregnancy rate of 24%. The proportion of transferable embryos on Day 7 was significantly (P < 0.05) influenced by maternal lineage of oocyte donors and by the frequency of follicle aspiration. Our study demonstrates the feasibility of generating nuclear transfer embryos with defined cytoplasmic background. These will be valuable tools to experimentally dissect the effects of nuclear and cytoplasmic components on embryonic, fetal, and postnatal development.
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Affiliation(s)
- Katja Brüggerhoff
- Department of Molecular Animal Breeding and Biotechnology, Ludwig-Maximilian University, D-85764 Oberschleissheim, Germany
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Chauhan MS, Nadir S, Bailey TL, Pryor AW, Butler SP, Notter DR, Velander WH, Gwazdauskas FC. Bovine follicular dynamics, oocyte recovery, and development of oocytes microinjected with a green fluorescent protein construct. J Dairy Sci 1999; 82:918-26. [PMID: 10342229 DOI: 10.3168/jds.s0022-0302(99)75310-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The present study was carried out to 1) evaluate the viability of in vitro fertilized zygotes after microinjection of DNA, 2) assess the influence of oocyte quality upon the development rate of embryos when injected with DNA, and 3) determine the integration frequency of green fluorescent protein DNA into microinjected embryos. Oocytes were aspirated from ovaries of nine nonlactating Holsteins and were categorized into grades A, B, C, and D. At 16 h after in vitro fertilization, approximately half of the pronuclear stage presumptive zygotes were classified as having 1 pronucleus or 2 pronuclei, and they were microinjected with DNA constructs. A potential predictor of DNA integration frequency at d 10 was assessment of the incidence of green fluorescing embryos. The proportion of cleaved embryos that developed to morulae or blastocysts was not different between groups with 1 pronucleus injected (45%), 1 pronucleus uninjected (64%), or 2 pronuclei injected (49%). However, the development of morulae or blastocysts was higher in the group with 2 pronuclei uninjected (69%). The overall developmental score of green fluorescent protein-positive embryos was higher for grade A oocytes (1.3 +/- 0.1) than for grade B (0.8 +/- 0.1), C (0.6 +/- 0.1), or D (0.3 +/- 0.1) oocytes. The results show that production of transgenic bovine blastocysts can occur from the microinjection of a presumptive zygote having only one visible pronucleus. Initial oocyte quality is an important factor in selection of oocytes suitable for microinjection of DNA and for preimplantation development to produce bovine transgenic embryos.
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Affiliation(s)
- M S Chauhan
- Department of Dairy Science, Virginia Polytechnic Institute and State University, Blacksburg 24061-0315, USA
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D'Occhio MJ, Jillella D, Lindsey BR. Factors that influence follicle recruitment, growth and ovulation during ovarian superstimulation in heifers: opportunities to increase ovulation rate and embryo recovery by delaying the exposure of follicles to LH. Theriogenology 1999; 51:9-35. [PMID: 10729059 DOI: 10.1016/s0093-691x(98)00228-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The outcome of ovarian follicular superstimulation protocols in heifers is influenced by the number of follicles that are stimulated to grow and the number induced to ovulate. At present, only a proportion of the follicles that are stimulated to grow progress to ovulation. The argument is developed in this review that failure of some of these follicles to ovulate may be due not to an intrinsic deficiency but rather to their relatively small size when the FSH treatment is initiated. Consequently, these follicles do not have the opportunity to undergo full maturation within the time frame of a conventional superstimulation protocol Based on this argument, we propose that delaying the LH surge would allow for completion of maturation by a greater number of follicles, resulting in an increased ovulation rate and in recovery of a greater number of viable embryos.
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Affiliation(s)
- M J D'Occhio
- Animal Sciences and Production Group, Central Queensland University, Rockhampton, Australia.
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