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Dode MAN, Capobianco N, Vargas LN, Mion B, Kussano NR, Spricigo JF, Franco MM. Seminal cell-free DNA as a potential marker for in vitro fertility of Nellore bulls. J Assist Reprod Genet 2024; 41:1357-1370. [PMID: 38438770 PMCID: PMC11143116 DOI: 10.1007/s10815-024-03068-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/16/2024] [Indexed: 03/06/2024] Open
Abstract
PURPOSE This study aimed to identify a marker for freezability and in vitro fertility of sperm samples before freezing. METHODS Semen was collected from nine Nelore bulls; half of the ejaculate was used for seminal plasma cell-free DNA (cfDNA) quantification, and the other half was cryopreserved. Evaluation of sperm movement using computer-assisted semen analysis and plasma membrane integrity and stability, acrosomal integrity, apoptosis, and mitochondrial potential using flow cytometry were performed on fresh and frozen/thawed semen at 0, 3, 6, and 12 h after thawing. Frozen/thawed sperm was also used for in vitro embryo production. cfDNA was extracted from each bull, and the total DNA and number of cell-free mitochondrial DNA (cfmtDNA) copies were quantified. Semen from each animal was used for IVF, and cleavage, blastocyst formation, and cell counts were evaluated. RESULTS Two groups were formed and compared based on the concentrations of cfDNA and cfmDNA present: low-cfDNA and high-cfDNA and low-cfmtDNA and high-cfmtDNA. Up to 12 h post-thawing, there were no differences between the groups in the majority of the sperm parameters evaluated. Cleavage, day 6 and 7 blastocyst rates, and the number of cells were higher in the high cfDNA group than in the low cfDNA group. Similar results were observed for cfmtDNA, except for the number of cells, which was similar between the groups. CONCLUSION The concentration of cfDNA and the relative number of copies of cfmtDNA in seminal plasma cannot predict the freezability of semen but can be used to predict in vitro embryo production.
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Affiliation(s)
- Margot A N Dode
- Institute of Biology, University of Brasilia, Brasília, DF, Brazil.
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil.
| | - Natalia Capobianco
- Institute of Biology, University of Brasilia, Brasília, DF, Brazil
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
| | - Luna Nascimento Vargas
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
| | - Bruna Mion
- Department of Animal Science, University of Guelph, Guelph, ON, Canada
| | - Nayara Ribeiro Kussano
- Institute of Biology, University of Brasilia, Brasília, DF, Brazil
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
| | - José Felipe Spricigo
- School of Veterinary and Animal Science, Federal University of Goiás, Goiania, GO, Brazil
| | - Mauricio Machaim Franco
- Laboratory of Animal Reproduction, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
- School of Veterinary Medicine, Federal University of Uberlândia, Uberlandia, Minas Gerais, Brazil
- Institute of Biotechnology, Federal University of Uberlândia, Uberlandia, Minas Gerais, Brazil
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2
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Crowe AD, Sánchez JM, Moore SG, McDonald M, Rodrigues R, Morales MF, Orsi de Freitas L, Randi F, Furlong J, Browne JA, Rabaglino MB, Lonergan P, Butler ST. Fertility in seasonal-calving pasture-based lactating dairy cows following timed artificial insemination or timed embryo transfer with fresh or frozen in vitro-produced embryos. J Dairy Sci 2024; 107:1788-1804. [PMID: 37806631 DOI: 10.3168/jds.2023-23520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 09/18/2023] [Indexed: 10/10/2023]
Abstract
The objective was to compare pregnancy per service event (P/S) in lactating dairy cows following timed artificial insemination (AI) or timed embryo transfer (ET) using either fresh or frozen in vitro-produced embryos. Oocytes were collected once per week for up to 9 wk using transvaginal ovum pick-up from elite dairy donors (ET-DAIRY; n = 40; Holstein-Friesian and Jersey) and elite beef donors (ET-ELITE-BEEF; n = 21; Angus). Both ET-DAIRY and ET-ELITE-BEEF donors consisted of heifers and cows. In addition, oocytes were collected from the ovaries of beef heifers of known pedigree following slaughter at a commercial abattoir (ET-COMM-BEEF; n = 119). Following in vitro maturation and fertilization, presumptive zygotes were cultured in vitro to the blastocyst stage. Grade 1 blastocysts were either transferred fresh or frozen for on-farm thawing and direct transfer. A total of 1,106 recipient cows (all lactating, predominantly Holstein-Friesian) located on 16 herdlets were blocked based on parity, calving date, and Economic Breeding Index, and randomly assigned to receive AI (n = 243) or ET (n = 863) after estrous synchronization with a 10-d Progesterone-synch protocol. Cows assigned to ET were further randomized to receive fresh (n = 187) or frozen (n = 178) ET-ELITE-BEEF embryos, fresh (n = 169) or frozen (n = 162) ET-DAIRY embryos, or fresh (n = 80) or frozen (n = 87) ET-COMM-BEEF embryos. Pregnancy was diagnosed using transrectal ultrasound on d 32 to 35 after synchronized ovulation and confirmed on d 62 to 65, at which time fetal sex was determined. Pregnancy per service event at d 32 was not different between AI (48.8%) and ET (48.9%) and did not differ between dairy and beef embryos (50.3% vs. 48.1%, respectively). However, P/S was less on d 32 following transfer of frozen embryos (41.6%) compared with fresh embryos (56.1%). Pregnancy loss between d 32 and 62 was greater for ET (15.1%) compared with AI (4.7%), with greater losses observed for frozen beef (18.5%), fresh beef (17.3%), and frozen dairy (19.2%) compared with fresh dairy (6.0%) embryos. Serum progesterone (P4) concentration on d 7 was associated with P/S at d 32 and 62. Cows in the quartile with the least serum P4 concentrations (quartile 1) had less probability of being pregnant on d 32 (33.4%) compared with cows in the 3 upper quartiles for serum P4 (45.7%, 55.6%, and 61.2% for quartile 2, quartile 3, and quartile 4, respectively). Sex ratio (male:female) at d 62 was skewed toward more male fetuses following ET (61.1:38.9) compared with AI (43.2:56.8) and was consistent with the sex ratio among in vitro blastocysts (61.2:38.8). In conclusion, P/S was similar for AI and ET, although pregnancy loss between d 32 and 62 was greater for ET than for AI.
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Affiliation(s)
- A D Crowe
- Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland P61 C996; School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5
| | - J M Sánchez
- School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5; Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, 28040, Madrid, Spain
| | - S G Moore
- Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland P61 C996
| | - M McDonald
- School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5
| | | | | | | | - F Randi
- CEVA Santé Animale, Libourne, Bordeaux, 33500, France
| | - J Furlong
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin, 4, Ireland
| | - J A Browne
- School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5
| | - M B Rabaglino
- School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5
| | - P Lonergan
- School of Agriculture and Food Science, University College Dublin, Ireland D04 N2E5.
| | - S T Butler
- Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland P61 C996.
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Li S, Ren J, Zhang W, Wang B, Ma Y, Su L, Dai Y, Liu G. Glutathione and selenium nanoparticles have a synergistic protective effect during cryopreservation of bull semen. Front Vet Sci 2023; 10:1093274. [PMID: 36876009 PMCID: PMC9978397 DOI: 10.3389/fvets.2023.1093274] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 01/20/2023] [Indexed: 02/18/2023] Open
Abstract
Introduction In the present study, the synergistic protective effect of co-supplementation of glutathione (GSH) with selenium nanoparticles (SeNPs) on the cryopreservation efficiency of bull semen was analyzed. Methods After collection, the ejaculates of Holstein bulls were subsequently diluted with a Tris extender buffer supplemented with different concentrations of SeNPs (0, 1, 2, and 4 μg/ml), followed by semen equilibration at 4°C and assessment of sperm viability and motility. Subsequently, the ejaculates of Holstein bulls were pooled, split into four equal groups, and diluted with a Tris extender buffer supplemented with basic extender (negative control group, NC group), 2 μg/ml SeNPs (SeNPs group), 4 mM GSH (GSH group), and 4 mM GSH plus 2 μg/ml SeNPs (GSH + SeNPs group). After cryopreservation, motility, viability, mitochondrial activity, plasma membrane integrity, acrosome integrity, concentration of malondialdehyde (MDA), superoxide dismutase (SOD), and catalase (CAT), and ability of frozen-thawed sperm cells to support in vitro embryonic development were evaluated. Results and discussion No side effect of SeNPs concentrations applied in the current study on the motility and viability of equilibrated bull spermatozoa was found. Meanwhile, supplementation of SeNPs significantly promoted the motility and viability of equilibrated bull spermatozoa. Furthermore, the co-supplementation of GSH with SeNPs effectively protected bull spermatozoa from cryoinjury as expressed by promoting semen motility, viability, mitochondrial activity, plasma membrane integrity, and acrosome integrity. Finally, the enhanced antioxidant capacity and embryonic development potential in the frozen-thawed bull spermatozoa cryopreserved by co-supplementation of GSH with SeNPs further confirmed the synergistic protective effect of co-supplementation of GSH with SeNPs on the cryopreservation of bull semen.
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Affiliation(s)
- Shubin Li
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Jingyu Ren
- College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, China
| | - Wenqi Zhang
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Biao Wang
- Animal Husbandry Institute, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot, Inner Mongolia, China
| | - Yuzhen Ma
- Center of Reproductive Medicine, Inner Mongolia People's Hospital, Hohhot, Inner Mongolia, China
| | - Liya Su
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Yanfeng Dai
- College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, China
| | - Gang Liu
- Key Laboratory of Medical Cell Biology, Clinical Medicine Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
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Relationship between quality parameters and fertilizing ability of cryopreserved sexed bull sperm. ANNALS OF ANIMAL SCIENCE 2022. [DOI: 10.2478/aoas-2022-0046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The aim of the experiment was to assess the correlation between sperm quality parameters and field fertility after AI with sex-sorted (X-bearing) bull semen. A total of 32 ejaculates from 26 Holstein-Friesian bulls were analyzed to assess sperm motility parameters (CASA), viability (SYBR-14/PI), apoptotic-like changes (YO-PRO-1/PI), chromatin structure (SCSA), and ATP content. In order to determine sperm fertilizing ability, 816 heifers and 727 cows were inseminated. Ultrasound diagnosis of pregnancy was performed on day 35 after insemination. For each ejaculate, the percentage of pregnant females was calculated separately. The results revealed that the pregnancy rate ranged from 20.0 to 85.7% for heifers and from 7.7 to 66.7% for cows. On the basis of the pregnancy rate (PR) obtained, the ejaculates were divided into 3 groups: high PR (about 25% of ejaculates), medium PR (about 50% of ejaculates) and low PR (about 25% of ejaculates). Significant differences were detected for amplitude of lateral head displacement (ALH) and beat cross frequency (BCF) between high- and low-fertility ejaculates in heifers. Pearson’s correlation analysis showed a significant relationship between the BCF and the pregnancy rate for heifers (r = 0.53, P<0.01) and there was a trend towards significance for ALH (r = −0.37, P = 0.07). There was no relationship between the sperm quality parameters and pregnancy rate of cows. In conclusion, the present study identified markers of sexed bull sperm function that were related to the fertility of inseminated heifers.
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Donnellan E, Lonergan P, Meade K, Fair S. An ex-vivo assessment of differential sperm transport in the female reproductive tract between high and low fertility bulls. Theriogenology 2022; 181:42-49. [DOI: 10.1016/j.theriogenology.2022.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/30/2021] [Accepted: 01/08/2022] [Indexed: 02/09/2023]
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Karamian M, Soleimanzadeh A, Tukmechi A, Batavani RA. PCR investigation of the vertical transmission of Mycobacterium bovis in Montbéliarde cattle in Gonbad, northeast of Iran. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2022. [DOI: 10.15547/bjvm.2020-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Bovine tuberculosis is an important global zoonosis. The causative agent of the disease is Mycobacterium bovis, belonging to the Mycobacterium tuberculosis complex. This study aimed to identify vertical transmission of Mycobacterium bovis in tuberculin positive pregnant dairy cows referred to the slaughterhouse and commercial sperm used to inseminate them in Gonbad, Gorgan province, Iran, by PCR assay. From March to September 2016, one thousand and seven hundred artificially inseminated cows were subjected to the tuberculin test; then, tuberculin positive cows were referred to the Gonbad slaughterhouse. Samples containing milk, lymph node, placenta, foetal abomasal fluid, and amniotic fluid were prepared from all affected cows and stored at -80 °C until analysis. Bacterial DNA was extracted from all specimens by a commercial kit. Detection was performed by amplifying pncATB gene using special primers via the polymerase chain reaction method. Results of tuberculin test revealed 144 positive cases (8.47%). PCR results for 48 milk samples, 120 biopsy samples, 63 samples of foetuses showed 9, 93 and 43 positive cases, respectively which all belonged to tuberculin positive samples. No positive sperm samples were identified. It was concluded that the infection rate with M. bovis in Montbéliarde cattle was high and also, that vertical transmission was not seen.
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Affiliation(s)
- M. Karamian
- Animal Reproduction and Artificial Insemination Department, National Research Centre, Egypt
| | - A. Soleimanzadeh
- Animal Reproduction and Artificial Insemination Department, National Research Centre, Egypt
| | - A. Tukmechi
- Animal Reproduction and Artificial Insemination Department, National Research Centre, Egypt
| | - R. A. Batavani
- Animal Reproduction and Artificial Insemination Department, National Research Centre, Egypt
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7
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El-Sheshtawy RI. Effect of turmeric extract and dimethyl sulfoxide on buffalo semen freezability and fertility. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2022. [DOI: 10.15547/bjvm.2020-0124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The freeze-thaw process results in structural and functional damages caused by overaccumulation of reactive oxygen species (ROS). Addition of antioxidants to semen extenders is of a great importance to overcome this oxidative damage. The study objective was to evaluate the consequence of using Tris-citric acid fructose egg yolk (TCFY) extender supplemented with a combination of turmeric extract and dimethyl sulfoxide (DMSO) [TTD] on sperm freezability and fertility. From five tubes (each containing 5 mL TCFY), the first tube contained neither turmeric extract nor DMSO and was kept as control. The other four tubes contained 1.5% DMSO plus 100 µL/5 mL, 200 µL/5 mL, 300 µL/5 mL and 400 µL/5 mL turmeric extract. Semen samples were pooled and extended to reach an application of 60×106 sperm/mL (TT1D to TT4D, respectively). Diluted semen was exposed to the freezing protocol. The post cooling results revealed significant improvement in percent of alive spermatozoa in TT1D, significant decrease in sperm abnormalities in all concentrations used, significant improvement in intact acrosome percentage in TT1D, TT2D and TT4D. The post thawing results exhibited significant improvement in sperm motility in TT1D, TT2D and TT4D; significant amelioration of sperm membrane integrity (HOST) in TT1D, TT2D, TT3D and TT4D. Acrosome integrity was maintained in all concentrations as in the control. It was concluded that TT1D revealed the best semen quality in cooled semen; and TT1D, TT2D exhibited the superior post thawing semen quality. In addition, conception rate (CR) of the post-thawed semen was ameliorated in TT1D, TT2D, TT3D and TT4D with TT1D being the best one with this regard.
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Affiliation(s)
- R. I. El-Sheshtawy
- Animal Reproduction and Artificial Insemination Department, National Research Centre, Egypt
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8
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Buranaamnuay K. The MTT assay application to measure the viability of spermatozoa: A variety of the assay protocols. Open Vet J 2021; 11:251-269. [PMID: 34307082 PMCID: PMC8288735 DOI: 10.5455/ovj.2021.v11.i2.9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/08/2021] [Indexed: 11/17/2022] Open
Abstract
The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) reduction assay is one of the methods used to evaluate the viability of sperm. In the assay, a tetrazolium component (MTT) is converted into MTT formazan by some specific enzymes in the viable cells. The amount of formazan product in theory is directly correlated with the percentage of viable sperms. It is quantified by measuring the absorbance using a spectrophotometer. The present article compiles the MTT assays that have been used to determine sperm viability in most animal species and humans. In each assay, other factors apart from the number of viable cells that potentially influence the accuracy and precision of results are stated, such as preparations of sperm and MTT solutions, length and conditions of incubation, and a solubilizing agent as well as the formazan detection method. Also, the strengths and shortcomings of the MTT test comparison with the others are summarized at the end of this article. This information may be useful for prospective researchers deciding to implement this colorimetric method in their experiments.
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Affiliation(s)
- Kakanang Buranaamnuay
- Molecular Agricultural Biosciences Cluster, Institute of Molecular Biosciences (MB), Mahidol University, Nakhon Pathom, Thailand
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9
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Effect of Tris-extender supplemented with a combination of turmeric and ethylene glycol on buffalo bull semen freezability and in vivo fertility. Trop Anim Health Prod 2021; 53:238. [PMID: 33792781 DOI: 10.1007/s11250-021-02668-5] [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: 07/14/2020] [Accepted: 03/15/2021] [Indexed: 10/21/2022]
Abstract
The objective of this study was to evaluate the effect of Tris-extender supplemented with a combination of turmeric and ethylene glycol on buffalo bull semen preservability and in vivo fertility. Five tubes (each contain 5 ml Tris-citric acid-fructose yolk, TCFY). The first tube contains turmeric extract and ethylene glycol and kept as a control. The other four tubes contain 1.5% ethylene glycol plus turmeric extract as follows: 100 μl/5 ml, 200 μl/5 ml, 300 μl/5 ml, and 400 μl/5 ml v/v). Pooled bull semen was added to the Tris extender and to Tris turmeric ethylene glycol. Extended semen was subjected to semen freezing protocol. Semen assessment was carried out. In Tris turmeric ethylene glycol post-cooling, sperm motility and alive sperms were significantly higher in the first concentration of Tris turmeric ethylene glycol (TTE1), sperm abnormalities were significantly lower in TTE1 and TTE2, and sperm membrane integrity (HOST) was significantly higher in TTE1 and acrosome percent was significantly higher in TTE1, TTE2, and TTE4 if compared to the control. Post-thawing, sperm motility was significantly higher in TTE1 as compared to the control and other concentrations of TE. All concentrations of TE were significantly higher in sperm membrane integrity (HOST) as relative to the control. Alive sperms were kept in TTE1 as the control. Acrosome percent was kept in most concentrations as the control. It is concluded that, in cooled and post-thawed semen, the first concentration (TTE1) gave the best sperm quality and conception rate.
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10
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Narud B, Khezri A, Zeremichael TT, Stenseth EB, Heringstad B, Johannisson A, Morrell JM, Collas P, Myromslien FD, Kommisrud E. Sperm chromatin integrity and DNA methylation in Norwegian Red bulls of contrasting fertility. Mol Reprod Dev 2021; 88:187-200. [PMID: 33634579 DOI: 10.1002/mrd.23461] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/18/2021] [Accepted: 02/10/2021] [Indexed: 12/28/2022]
Abstract
In this study, the complexity of chromatin integrity was investigated in frozen-thawed semen samples from 37 sires with contrasting fertility, expressed as 56-day non-return rates (NR56). Protamine deficiency, thiols, and disulfide bonds were assessed and compared with previously published data for DNA fragmentation index (DFI) and high DNA stainability (HDS). In addition, in vitro embryo development and sperm DNA methylation were assessed using semen samples from 16 of these bulls. The percentages of DFI and HDS were negatively associated with NR56 and cleavage rate and positively associated with sperm protamine deficiency (p < 0.05). Significant differences in cleavage and blastocyst rates were observed between bulls of high and low NR56. However, once fertilization occurred, further development into blastocysts was not associated with NR56. The differential methylation analysis showed that spermatozoa from bulls of low NR56 were hypermethylated compared to bulls of high NR56. Pathway analysis showed that genes annotated to differentially methylated cytosines could participate in different biological pathways and have important biological roles related to bull fertility. In conclusion, sperm cells from Norwegian Red bulls of inferior fertility have less compact chromatin structure, higher levels of DNA damage, and are hypermethylated compared with bulls of superior fertility.
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Affiliation(s)
- Birgitte Narud
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Abdolrahman Khezri
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | | | - Else-Berit Stenseth
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Bjørg Heringstad
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, Ås, Norway
| | - Anders Johannisson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Jane M Morrell
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Philippe Collas
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | | | - Elisabeth Kommisrud
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
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Longobardi V, Kosior MA, Pagano N, Fatone G, Staropoli A, Vassetti A, Vinale F, Campanile G, Gasparrini B. Changes in Bull Semen Metabolome in Relation to Cryopreservation and Fertility. Animals (Basel) 2020; 10:E1065. [PMID: 32575657 PMCID: PMC7341314 DOI: 10.3390/ani10061065] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023] Open
Abstract
Semen cryopreservation determines several sperm damages, including the loss of fertility-associated proteins. The purpose of the study was to compare the metabolite contents in bovine sperm and seminal plasma before and after cryopreservation, and between high- and low-fertility bulls in vitro. Forty-eight ejaculates, collected from eight bulls (six per bull), were analyzed by liquid chromatography-mass spectrometry. Cryopreservation resulted in an over-expression of lysophosphatidylcholine (0:0/18:2(9Z,12Z)) in seminal plasma. In addition, higher levels of glycine betaine and pyro-l-glutaminyl-l-glutamine were observed in cryopreserved compared to fresh spermatozoa. The fresh seminal plasma of high-fertility bulls showed an over-expression of l-acetylcarnitine, glycerol tripropanoate, 2,3-diacetoxypropyl stearate and glycerophosphocholine, and an under-expression of lysophosphatidylcholine and butyrylcarnitine, compared to low-fertility bulls. Higher levels of glycerophosphocholine and lysophosphatidylcholine (16:0/0:0) were recorded in fresh spermatozoa from high-fertility bulls. In high-fertility bulls, a greater content of glycerophosphocholine and lower levels of butyrylcarnitine, glycine betaine and l-carnitine were found in cryopreserved seminal plasma, and lower levels of glycine betaine were detected in cryopreserved spermatozoa. In conclusion, cryopreservation affects bovine semen metabolome at both plasmatic and cellular compartments, and metabolic profile differs between high- and low-fertility bulls.
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Affiliation(s)
- Valentina Longobardi
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, 80138 Naples, Italy;
| | - Michal A. Kosior
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
| | - Nunzia Pagano
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
| | - Gerardo Fatone
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
| | - Alessia Staropoli
- CNR Institute for Sustainable Plant Protection, 80055 Portici, Italy; (A.S.); (A.V.)
| | - Anastasia Vassetti
- CNR Institute for Sustainable Plant Protection, 80055 Portici, Italy; (A.S.); (A.V.)
| | - Francesco Vinale
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
- CNR Institute for Sustainable Plant Protection, 80055 Portici, Italy; (A.S.); (A.V.)
| | - Giuseppe Campanile
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
| | - Bianca Gasparrini
- Department of Veterinary Medicine and Animal Production, Federico II University of Naples, 80137 Naples, Italy; (M.A.K.); (N.P.); (F.V.); (G.C.); (B.G.)
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Abdalla H, Elghafghuf A, Elsohaby I. Evaluating sire effects on cow fertility: Timed AI and repeat-breeder dairy cows. Anim Reprod Sci 2019; 209:106147. [PMID: 31514918 DOI: 10.1016/j.anireprosci.2019.106147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 07/25/2019] [Accepted: 08/02/2019] [Indexed: 11/26/2022]
Abstract
In this single herd observational study, there is investigation of the effects of 81 sires (with 11,424 artificial inseminations) on conception rates in 1790 Holstein cows for 5 years. Sires were catagorized based on the published sire conception rate (SCR) into different sire fertility groups (low, average and high fertility sires). The performance of different-sire fertility groups was assessed in timed artificial insemination (TAI) and repeat-breeder (RB) cows. With this aim, two logistic regression models with sire, inseminator, cow, and lactation random effects were applied to data on pregnancies assessed at days 30 and 70 post-insemination. Fixed effects of sire fertility group, sire breed, cow-fertility status, insemination type, postpartum problems, milk yield, temperature humidity index, and year were evaluated. Results from the analysis indicated there was a significant individual sire effect on conception rates, and large heterogeneity in values for this variable among sires. Results indicate that SCR could be assessed to predict low fertility sires reasonably well, and the predicted probabilities for pregnancy per AI (P/AI) at 30 and 70 days post-insemination for high fertility sires were consistent for the most part with values for the SCR. The sire breed did not affect conception rates at days 30 and 70 post-insemination nor its interactions with insemination type (estrous detection AI (EDAI) compared with TAI) and cow-fertility status (RB compared with non-RB). Predicting response probabilities for sires with at least 100 inseminations in each insemination group resulted in greater conception probabilities in cows in which there was EDAI than those in the TAI group.
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Affiliation(s)
- Hany Abdalla
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Zagazig City, 44511, Sharkia Governorate, Egypt
| | - Adel Elghafghuf
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI, C1A 4P3, Canada; Department of Statistics, Faculty of Science, University of Misurata, P.O. Box 2478, Misurata, Libya
| | - Ibrahim Elsohaby
- Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI, C1A 4P3, Canada; Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig City, 44511, Sharkia Governorate, Egypt.
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13
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You JB, Wang Y, McCallum C, Tarlan F, Hannam T, Lagunov A, Jarvi K, Sinton D. Live sperm trap microarray for high throughput imaging and analysis. LAB ON A CHIP 2019; 19:815-824. [PMID: 30693362 DOI: 10.1039/c8lc01204k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There is a growing appreciation and understanding of cell-to-cell variability in biological samples. However, research and clinical practice in male fertility has relied on population, or sample-based characteristics. Single-cell resolution is particularly important given the winner-takes-all nature of both natural and in vitro fertilization: it is the properties of a single cell, not the population, that are passed to the next generation. While there are a range of methods for single cell analysis, arraying a larger number of live sperm has not been possible due to the strong locomotion of the cells. Here we present a 103-trap microarray that traps, aligns and arrays individual live sperm. The method enables high-resolution imaging of the aligned cell head, the application of dye-based DNA and mitochondrial analyses, and the quantification of motility characteristics, such as tail beat. In testing, a 2400-post array trapped ∼400 sperm for individual analyses of tail beating frequency and amplitude, DNA integrity via acridine orange staining, and mitochondrial activity via staining. While literature results are mixed regarding a possible correlation between motility and DNA integrity of sperm at sample-level, results here find no statistical correlation between tail beat characteristics and DNA integrity at the cell-level. The trap array uniquely enables the high-throughput study of individual live sperm in semen samples - assessing the inherently single-cell selection process of fertilization, with single-cell resolution.
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Affiliation(s)
- Jae Bem You
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON M5S 3G8, Canada.
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14
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Valverde A, Areán H, Fernández A, Bompart D, García-Molina A, López-Viana J, Soler C. Combined effect of type and capture area of counting chamber and diluent on Holstein bull sperm kinematics. Andrologia 2018; 51:e13223. [PMID: 30588646 DOI: 10.1111/and.13223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 11/28/2022] Open
Abstract
The evaluation of sperm motion is crucial for processing of seminal doses for artificial insemination. Here, the combined effect of the type and capture area of three counting chambers, together with the type of diluent employed, on sperm motility was analysed. Ejaculates from thirteen Holstein bulls were used for sperm kinematic analysis with the ISAS® v1 CASA-Mot system, using two capillary-loaded counting chambers (Leja® and Cell-Vu® ) and one drop displacement chamber (Makler® ). Nine fixed positions were analysed per chamber type, considering central and lateral and three longitudinal fields. Independent of the diluent used, differences were found between the three chambers. Independent of the extender, no differences in x-axis were observed with Cell-Vu® , while using Leja® , some parameters showed lower values in the centre than in lateral areas. In both counting chambers, the lowest values were observed in the distal area. Results obtained with the two diluents were highly different with a very low correlation between them. In conclusion, the capture area inside the chambers leads to significant changes in sperm kinematic parameters and different dilution media introduce considerable differences in the motility patterns. It is necessary to optimise sampling methods and specific set-ups to be used with CASA-Mot technology.
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Affiliation(s)
- Anthony Valverde
- Costa Rica Institute of Technology, School of Agronomy, Alajuela, Costa Rica.,Departament de Biologia Cellular, Biologia Funcional i Antropologia Física, Universitat de València, Burjassot, Spain
| | | | | | - Daznia Bompart
- R+D Department, Projectes i Serveis R+D, S.L., Science Park of the València University, Paterna, Spain
| | - Almudena García-Molina
- R+D Department, Projectes i Serveis R+D, S.L., Science Park of the València University, Paterna, Spain
| | | | - Carles Soler
- Departament de Biologia Cellular, Biologia Funcional i Antropologia Física, Universitat de València, Burjassot, Spain.,R+D Department, Projectes i Serveis R+D, S.L., Science Park of the València University, Paterna, Spain
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15
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Abstract
The ability to predict the fertility of bulls before semen is released into the field has been a long-term objective of the animal breeding industry. However, the recent shift in the dairy industry towards the intensive use of young genomically selected bulls has increased its urgency. Such bulls, which are often in the highest demand, are frequently only used intensively for one season and consequently there is limited time to track their field fertility. A more pressing issue is that they produce fewer sperm per ejaculate than mature bulls and therefore there is a need to reduce the sperm number per straw to the minimum required without a concomitant reduction in fertility. However, as individual bulls vary in the minimum number of sperm required to achieve their maximum fertility, this cannot be currently achieved without extensive field-testing. Although an in vitro semen quality test, or combination of tests, which can accurately and consistently determine a bull's fertility and the optimum sperm number required represent the 'holy grail' in terms of semen assessment, this has not been achieved to date. Understanding the underlying causes of variation in bull fertility is a key prerequisite to achieving this goal. In this review, we consider the reliability of sire conception rate estimates and then consider where along the pregnancy establishment axis the variation in reproductive loss between bulls occurs. We discuss the aetiology of these deficiencies in sperm function and propose avenues for future investigation.
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16
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Lyons A, Narciandi F, Donnellan E, Romero-Aguirregomezcorta J, Farrelly CO, Lonergan P, Meade KG, Fair S. Recombinant β-defensin 126 promotes bull sperm binding to bovine oviductal epithelia. Reprod Fertil Dev 2018; 30:1472-1481. [DOI: 10.1071/rd17415] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 04/12/2018] [Indexed: 12/11/2022] Open
Abstract
Primate β-defensin 126 regulates the ability of spermatozoa to bind to oviductal epithelial cells in vitro. Bovine β-defensin 126 (BBD126) exhibits preferential expression in the cauda epididymis of the bull, but there have been few studies on its functional role in cattle. The aim of the present study was to examine the role of BBD126 in bull sperm binding to bovine oviductal epithelial cell (BOEC) explants. BBD126 has been shown to be highly resistant to the standard methods of dissociation used in other species and, as a result, corpus epididymal spermatozoa, which have not been exposed to the protein, were used to study the functional role of BBD126. Corpus epididymal spermatozoa were incubated with recombinant (r) BBD126 in the absence or presence of anti-BBD126 antibody. Addition of rBBD126 significantly enhanced the ability of epididymal spermatozoa to bind to BOEC explants (P < 0.05). Anti-BBD126 antibody blocked the BBD126-mediated increase in sperm binding capacity. Ejaculated spermatozoa, which are coated with native BBD126 protein but also a large number of seminal plasma proteins in vivo, were incubated with rBBD126 in the absence or presence of the anti-BBD126 antibody. Addition of rBBD126 significantly enhanced the ability of ejaculated spermatozoa to bind to BOEC explants (P < 0.05), whereas rBBD126 also reduced corpus sperm agglutination (P < 0.05). These results suggest that, similar to the role of its analogue in the macaque, spermatozoa with more BBD126 in their acrosome may represent spermatozoa with more oviduct binding capacity.
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17
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Murphy EM, Eivers B, O'Meara CM, Lonergan P, Fair S. Effect of storage temperature, nitrogen gassing and sperm concentration on the in vitro semen quality and in vivo fertility of liquid bull semen stored in INRA96. Theriogenology 2017; 108:223-228. [PMID: 29253665 DOI: 10.1016/j.theriogenology.2017.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/27/2017] [Accepted: 12/02/2017] [Indexed: 10/18/2022]
Abstract
The aim of this study was to assess the effect of storage temperature, nitrogen (N2) gassing and sperm concentration on in vitro characteristics and calving rate (CR) following artificial insemination (AI) of liquid bull semen stored in INRA96. In Experiment 1 the effect of liquid bull semen diluted in either N2 bubbled or non-bubbled INRA96 at a concentration of 5 × 106 sperm per 0.25 mL insemination dose and stored at 5 or 15 °C was assessed subjectively for total and progressive motility on Days 0, 1, 2, 3 and 4 post collection. In Experiment 2a, the effect of stored liquid semen at three sperm concentrations (3, 4 or 5 × 106 sperm per 0.25 mL insemination dose) on total and progressive motility was assessed subjectively on Days 0, 1 and 2 post collection. In Experiment 2b, the field fertility of liquid semen stored at ambient temperature at a concentration of 3, 4 or 5 × 106 sperm per 0.25 mL dose and inseminated on Days 1 or 2 post collection was assessed in comparison to frozen-thawed semen (total of n = 5742). In Experiment 1, total and progressive motility decreased with increased duration of storage (P < 0.01); however, there was no effect of N2 bubbling on motility on Days 0, 1, 2, 3 and 4 of storage. There was an effect of temperature on total and progressive motility, regardless of treatment, as semen stored at 15°C recorded higher motility values than semen stored at 5°C (P < 0.01). In Experiment 2a, there was no effect of sperm concentration on total or progressive motility on Days 0, 1 or 2 of storage. There was a linear decrease in motility with increased duration of storage (P < 0.01); however, there was no sperm concentration by day interaction. In Experiment 2b, there was an effect of sperm concentration on CR (P < 0.01); semen diluted to 3 and 4 × 106 sperm per dose resulted in a lower CR after 2 days of storage (41.1 and 44.7%, respectively) in comparison to frozen-thawed semen (55.2%) but did not differ to CR of semen diluted to 5 × 106 sperm per dose on Day 2 of storage. There was an effect of parity, fertility sub-index and days in milk (DIM) at AI on CR (P < 0.01). In conclusion, N2 bubbling and sperm concentration had no effect on in vitro sperm motility of liquid semen, but this study demonstrated a reduction in CR on Day 2 of storage at lower sperm concentrations in comparison to frozen-thawed semen.
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Affiliation(s)
- E M Murphy
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland; National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - B Eivers
- National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - C M O'Meara
- National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - P Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, D04 N2E5, Ireland
| | - S Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland.
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18
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Nongbua T, Guo Y, Edman A, Humblot P, Morrell JM. Effect of bovine seminal plasma on bovine endometrial epithelial cells in culture. Reprod Domest Anim 2017; 53:85-92. [DOI: 10.1111/rda.13069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 07/21/2017] [Indexed: 12/16/2022]
Affiliation(s)
- T Nongbua
- Division of Reproduction; Department of Clinical Sciences; Swedish University of Agricultural Sciences (SLU); Uppsala Sweden
- Faculty of Veterinary Sciences; Mahasarakham University; Maha Sarakham Thailand
| | - Y Guo
- Division of Reproduction; Department of Clinical Sciences; Swedish University of Agricultural Sciences (SLU); Uppsala Sweden
| | - A Edman
- VikingGenetics; Skara Sweden
| | - P Humblot
- Division of Reproduction; Department of Clinical Sciences; Swedish University of Agricultural Sciences (SLU); Uppsala Sweden
| | - JM Morrell
- Division of Reproduction; Department of Clinical Sciences; Swedish University of Agricultural Sciences (SLU); Uppsala Sweden
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19
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Whiston R, Finlay EK, McCabe MS, Cormican P, Flynn P, Cromie A, Hansen PJ, Lyons A, Fair S, Lonergan P, O' Farrelly C, Meade KG. A dual targeted β-defensin and exome sequencing approach to identify, validate and functionally characterise genes associated with bull fertility. Sci Rep 2017; 7:12287. [PMID: 28947819 PMCID: PMC5613009 DOI: 10.1038/s41598-017-12498-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 09/11/2017] [Indexed: 12/30/2022] Open
Abstract
Bovine fertility remains a critical issue underpinning the sustainability of the agricultural sector. Phenotypic records collected on >7,000 bulls used in artificial insemination (AI) were used to identify 160 reliable and divergently fertile bulls for a dual strategy of targeted sequencing (TS) of fertility-related β-defensin genes and whole exome sequencing (WES). A haplotype spanning multiple β-defensin genes and containing 94 SNPs was significantly associated with fertility and functional analysis confirmed that sperm from bulls possessing the haplotype showed significantly enhanced binding to oviductal epithelium. WES of all exons in the genome in 24 bulls of high and low fertility identified 484 additional SNPs significantly associated with fertility. After validation, the most significantly associated SNP was located in the FOXJ3 gene, a transcription factor which regulates sperm function in mice. This study represents the first comprehensive characterisation of genetic variation in bovine β-defensin genes and functional analysis supports a role for β-defensins in regulating bull sperm function. This first application of WES in AI bulls with divergent fertility phenotypes has identified a novel role for the transcription factor FOXJ3 in the regulation of bull fertility. Validated genetic variants associated with bull fertility could prove useful for improving reproductive outcomes in cattle.
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Affiliation(s)
- Ronan Whiston
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Emma K Finlay
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Matthew S McCabe
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Cormican
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Flynn
- Weatherbys Scientific, Johnstown, Naas, Co Kildare, Ireland
| | - Andrew Cromie
- Irish Cattle Breeding Federation, Bandon, Co. Cork, Ireland
| | - Peter J Hansen
- Department of Animal Sciences, University of Florida, Gainesville, Florida, USA
| | - Alan Lyons
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Sean Fair
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Patrick Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Cliona O' Farrelly
- Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, Ireland
| | - Kieran G Meade
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland.
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20
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Carreira JT, Trevizan JT, Carvalho IR, Kipper B, Rodrigues LH, Silva C, Perri SHV, Drevet JR, Koivisto MB. Does sperm quality and DNA integrity differ in cryopreserved semen samples from young, adult, and aged Nellore bulls? Basic Clin Androl 2017. [PMID: 28649382 PMCID: PMC5479005 DOI: 10.1186/s12610-017-0056-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Background In humans, it is now well documented that rising paternal age is correlated with decreased sperm DNA integrity and embryonic developmental failures. On the other side of the coin, it is also reported that very young fathers such as teenagers carry an increased risk of adverse birth outcomes. These observations suggest that, at least in humans, there is an age window for optimal sperm DNA integrity. In bovine, little is known about sperm DNA quality in young bulls and how it evolves with age. This study aimed to fill in this gap as it may be of importance for the bovine industry to know when exactly a bull is an optimal performer for reproductive programs. Methods Forty Nellore bulls were divided into three age groups: 1.8 to 2 years – young bulls; 3.5 to 7 years – adult bulls; and 8 to 14.3 years – aged bulls. Three ejaculates were collected from each bull, cryopreserved and evaluated for various parameters including: computer-assisted sperm analysis (CASA), plasma membrane and acrosome integrity, mitochondrial potential, sperm nuclear protamination, DNA oxidative damage, and Sperm Chromatin Structure Assay (SCSA). Results We report here that young bulls presented superior values for motility, plasma and acrosomal membrane integrity, and high mitochondrial potential. However, they also presented higher values for sperm morphological abnormalities compared to adult and aged animal groups (p < 0.05). In addition, young bulls exhibited more defective protamination than older animals did. The oldest bulls showed more nuclear oxidative damage than the younger groups of bulls while both the young and aged groups were found more susceptible to DNA denaturation as revealed with the SCSA test (p < 0.05). Conclusion These results indicate that young bulls spermatozoa best survived the freezing procedure, followed by adult and aged bulls. However, young and aged bulls were found to be more susceptible to DNA damage, respectively caused by protamine deficiency and oxidation. Therefore, although young bulls have correct semen parameters according to classical evaluation, our results indicate that they may show some structural nuclear immaturity.
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Affiliation(s)
- J T Carreira
- Instituto Federal de Minas Gerais, IFMG, 05, Fazenda Varginha, Estrada Bambuí-Medeiros, Km 05, CEP38900-000 Bambuí, Minas Gerais Brazil
| | - J T Trevizan
- FMVA, Faculty of Veterinary Medicine, UNESP - Univ Estadual Paulista, São José do Rio Preto, Brazil
| | - I R Carvalho
- FMVA, Faculty of Veterinary Medicine, UNESP - Univ Estadual Paulista, São José do Rio Preto, Brazil
| | - B Kipper
- FMVA, Faculty of Veterinary Medicine, UNESP - Univ Estadual Paulista, São José do Rio Preto, Brazil
| | | | - C Silva
- CRVLagoa, Sertãozinho, Brazil
| | - S H V Perri
- FMVA, Faculty of Veterinary Medicine, UNESP - Univ Estadual Paulista, São José do Rio Preto, Brazil
| | - J R Drevet
- GReD Laboratory, CNRS UMR6293 - INSERM U1103 - Clermont Université, Clermont-Ferrand, France
| | - M B Koivisto
- FMVA, Faculty of Veterinary Medicine, UNESP - Univ Estadual Paulista, São José do Rio Preto, Brazil
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Kropp J, Carrillo JA, Namous H, Daniels A, Salih SM, Song J, Khatib H. Male fertility status is associated with DNA methylation signatures in sperm and transcriptomic profiles of bovine preimplantation embryos. BMC Genomics 2017; 18:280. [PMID: 28381255 PMCID: PMC5382486 DOI: 10.1186/s12864-017-3673-y] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 03/31/2017] [Indexed: 11/12/2022] Open
Abstract
Background Infertility in dairy cattle is a concern where reduced fertilization rates and high embryonic loss are contributing factors. Studies of the paternal contribution to reproductive performance are limited. However, recent discoveries have shown that, in addition to DNA, sperm delivers transcription factors and epigenetic components that are required for fertilization and proper embryonic development. Hence, characterization of the paternal contribution at the time of fertilization is warranted. We hypothesized that sire fertility is associated with differences in DNA methylation patterns in sperm and that the embryonic transcriptomic profiles are influenced by the fertility status of the bull. Embryos were generated in vitro by fertilization with either a high or low fertility Holstein bull. Blastocysts derived from each high and low fertility bulls were evaluated for morphology, development, and transcriptomic analysis using RNA-Sequencing. Additionally, DNA methylation signatures of sperm from high and low fertility sires were characterized by performing whole-genome DNA methylation binding domain sequencing. Results Embryo morphology and developmental capacity did not differ between embryos generated from either a high or low fertility bull. However, RNA-Sequencing revealed 98 genes to be differentially expressed at a false discovery rate < 1%. A total of 65 genes were upregulated in high fertility bull derived embryos, and 33 genes were upregulated in low fertility derived embryos. Expression of the genes CYCS, EEA1, SLC16A7, MEPCE, and TFB2M was validated in three new pairs of biological replicates of embryos. The role of the differentially expressed gene TFB2M in embryonic development was further assessed through expression knockdown at the zygotic stage, which resulted in decreased development to the blastocyst stage. Assessment of the epigenetic signature of spermatozoa between high and low fertility bulls revealed 76 differentially methylated regions. Conclusions Despite similar morphology and development to the blastocyst stage, preimplantation embryos derived from high and low fertility bulls displayed significant transcriptomic differences. The relationship between the paternal contribution and the embryonic transcriptome is unclear, although differences in methylated regions were identified which could influence the reprogramming of the early embryo. Further characterization of paternal factors delivered to the oocyte could lead to the identification of biomarkers for better selection of sires to improve reproductive efficiency. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3673-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jenna Kropp
- Department of Animal Sciences, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - José A Carrillo
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Hadjer Namous
- Department of Animal Sciences, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Alyssa Daniels
- Department of Animal Sciences, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Sana M Salih
- Department of Obstetrics and Gynecology, University of Wisconsin-Madison, Madison, WI, 53792, USA.,Present address: Department of Obstetrics and Gynecology, West Virginia University, Morgantown, WV, 26508, USA
| | - Jiuzhou Song
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Hasan Khatib
- Department of Animal Sciences, University of Wisconsin-Madison, Madison, WI, 53706, USA.
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Holden SA, Fernandez-Fuertes B, Murphy EM, Lonergan P, Fair S. Effect of seminal plasma from high- and low-fertility bulls on cauda epididymal sperm function. Reprod Fertil Dev 2017; 29:2457-2465. [DOI: 10.1071/rd17136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 05/09/2017] [Indexed: 11/23/2022] Open
Abstract
The aim of this study was to characterise the effect of seminal plasma (SP) from bulls of high or low fertility on sperm function. First, the effect of SP on the motility of fresh cauda epididymal spermatozoa (CES) and frozen–thawed ejaculated spermatozoa was assessed (Experiment 1a). Seminal plasma was then collected from bulls of known high and low fertility. Pooled CES were incubated in the SP from each bull, diluted and assessed for motility and viability on Days 1, 2, 3 and 5 after packaging as fresh semen (Experiment 1b). Also assessed were motility, kinematics, viability and mitochondrial membrane potential after thawing (Experiment 1c) as well as hypotonic resistance (Experiment 2) and fertilisation potential using in vitro fertilisation (Experiment 3). Seminal plasma increased the motility of CES (P < 0.05); however, there was no effect of SP on the motility and viability of fresh CES or on CES post-thaw motility, viability and mitochondrial membrane potential (P > 0.05). The hypotonic resistance of CES was reduced by SP (P < 0.05), irrespective of whether the SP was from high- or low-fertility bulls. Seminal plasma from high- or low-fertility bulls had no effect on cleavage or blastocyst rates (P > 0.05). In conclusion, SP affects the physiological function of CES but there is no difference between SP from high- or low-fertility bulls.
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Murphy EM, Murphy C, O'Meara C, Dunne G, Eivers B, Lonergan P, Fair S. A comparison of semen diluents on the in vitro and in vivo fertility of liquid bull semen. J Dairy Sci 2016; 100:1541-1554. [PMID: 27889127 DOI: 10.3168/jds.2016-11646] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 10/03/2016] [Indexed: 11/19/2022]
Abstract
The aim of this study was to assess the effect of semen diluent on calving rate (CR) following artificial insemination with liquid bull semen stored for up to 3 d postcollection. In experiment 1, the effect of storing liquid semen maintained at a constant ambient temperature in 1 of 7 different diluents [Caprogen (homemade), OptiXcell, BioXcell, BullXcell, INRA96, NutriXcell, or AndroMed (all commercially available)] on total and progressive motility was assessed on d 0, 1, 2, and 3 postcollection. In experiment 2, the field fertility of liquid semen diluted in Caprogen, BioXcell, or INRA96 and inseminated on d 1, 2, or 3 postcollection was assessed in comparison to frozen-thawed semen (total of n = 19,126 inseminations). In experiment 3, the effect of storage temperature fluctuations (4 and 18°C) on total and progressive motility following dilution in Caprogen, BioXcell, and INRA96 was assessed on d 0, 1, 2, and 3 postcollection. In experiment 1, semen stored in Caprogen, BioXcell, and INRA96 resulted in the highest total and progressive motility on d 1, 2, and 3 of storage compared with OptiXcell, BullXcell, NutriXcell, and AndroMed. In experiment 2, an effect of diluent on CR was found as semen diluted in BioXcell had a lower CR on d 1, 2, and 3 of storage (46.3, 35.4, and 34.0%, respectively) in comparison with Caprogen (55.8, 52.0, and 51.9%, respectively), INRA96 (55.0, 55.1, and 52.2%, respectively), and frozen-thawed semen (59.7%). Effects were found of parity, cow fertility sub-index, as well as the number of days in milk on CR. In experiment 3, when the storage temperature of diluted semen fluctuated between 4 and 18°C, to mimic what occurs in the field (nighttime vs. daytime), BioXcell had the lowest total and progressive motility in comparison to Caprogen and INRA96. In conclusion, diluent significantly affected sperm motility when stored for up to 3 d. Semen diluted in INRA96 resulted in a similar CR to semen diluted in Caprogen and to frozen-thawed semen, whereas that diluted in BioXcell resulted in a decreased CR. Consistent with this finding, semen diluted in BioXcell was less tolerant of temperature fluctuations than that stored in Caprogen or INRA96. Given that it can be used directly off the shelf, INRA96 may be a suitable alternative to Caprogen for the storage of liquid bull semen.
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Affiliation(s)
- Edel M Murphy
- Laboratory of Animal Reproduction, Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Castletroy, Limerick, V94 T9PX, Ireland; National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Craig Murphy
- Animal and Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland
| | - Ciara O'Meara
- National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Gemma Dunne
- National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Bernard Eivers
- National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Patrick Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, D04 N2E5, Ireland
| | - Sean Fair
- Laboratory of Animal Reproduction, Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Castletroy, Limerick, V94 T9PX, Ireland.
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Holden SA, Fernandez-Fuertes B, Murphy C, Whelan H, O'Gorman A, Brennan L, Butler ST, Lonergan P, Fair S. Relationship between in vitro sperm functional assessments, seminal plasma composition, and field fertility after AI with either non-sorted or sex-sorted bull semen. Theriogenology 2016; 87:221-228. [PMID: 27678515 DOI: 10.1016/j.theriogenology.2016.08.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 08/25/2016] [Accepted: 08/26/2016] [Indexed: 12/13/2022]
Abstract
The hypothesis of this study was that different in vitro parameters are required to predict the in vivo fertility of non-sorted (NS) and sex-sorted (SS) semen. Thus, the aim was to correlate in vitro bull sperm functional parameters (experiment 1) and seminal plasma composition (experiment 2) with pregnancy rates using 2 cohorts of bulls (NS and SS). Experiment 1: ejaculates from each bull (n = 3 ejaculates per bull; n = 6 bulls for both NS and SS) were assessed for motility, thermal stress tolerance and morphology using microscopy, and viability, osmotic resistance, mitochondrial membrane potential, and acrosome integrity using flow cytometry. Fertilizing ability was assessed using IVF. Experiment 2: ejaculates (n = 3 per bull; n = 8 and 6 bulls for NS and SS, respectively) were collected, seminal plasma harvested and frozen and later analyzed for amino acid and fatty acid composition using gas chromatography mass spectrometry. In the NS cohort of bulls, there was no correlation between pregnancy rate and any of the sperm functional parameters assessed. However, within the SS cohort, motility and viability were correlated with pregnancy rate (r = 0.84 and 0.80, respectively; P < 0.05). There was no correlation between IVF outcome and pregnancy rate in either the SS or NS cohort of bulls. In the NS cohort of bulls, concentrations of the amino acid isoleucine and the fatty acid tricosylic acid (C23:0) were correlated with pregnancy rate (r = 0.80 and 0.74, respectively; P < 0.05). Within the SS cohort of bulls, the amino acid glutamic acid and the fatty acid arachidic acid (C20:0) were correlated with pregnancy rate (r = 0.84 and 0.82, respectively; P < 0.05). In conclusion, this study suggests that different in vitro markers of fertility are required to predict the fertility of NS and SS sperm.
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Affiliation(s)
- S A Holden
- Laboratory of Animal Reproduction, Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
| | - B Fernandez-Fuertes
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - C Murphy
- Laboratory of Animal Reproduction, Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
| | - H Whelan
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland; Institute of Food and Health, Conway Institute, University College Dublin, Dublin, Ireland
| | - A O'Gorman
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland; Institute of Food and Health, Conway Institute, University College Dublin, Dublin, Ireland
| | - L Brennan
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland; Institute of Food and Health, Conway Institute, University College Dublin, Dublin, Ireland
| | - S T Butler
- Teagasc Animal and Grassland Research and Innovation Centre, Moorepark Fermoy, Co. Cork, Ireland
| | - P Lonergan
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - S Fair
- Laboratory of Animal Reproduction, Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland.
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Galli C, Colleoni S, Duchi R, Lazzari G. Male Factors Affecting the Success of Equine In Vitro Embryo Production by Ovum Pickup-Intracytoplasmic Sperm Injection in a Clinical Setting. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.05.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cox JF, Jeria E, Bocic A, Vera N, Soto-Saravia R, Dorado J. Characterization of the productive performance of Highlander sheep in Southern Chile. II. Male reproductive traits. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Murphy C, Holden SA, Murphy EM, Cromie AR, Lonergan P, Fair S. The impact of storage temperature and sperm number on the fertility of liquid-stored bull semen. Reprod Fertil Dev 2015; 28:RD14369. [PMID: 25739711 DOI: 10.1071/rd14369] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 01/15/2015] [Indexed: 02/28/2024] Open
Abstract
In Ireland, liquid bull semen is stored at unregulated ambient temperatures, typically at 5×106 spermatozoa per dose, and inseminated within 2.5 days of collection. In Experiment 1, the effect of storage temperature (5, 15, 22, 32°C and fluctuations (Flux) between these temperatures) on progressive motility, viability, acrosomal status, DNA fragmentation and osmotic resistance was assessed. In Experiment 2, the field fertility of liquid semen at 5, 4 and 3×106 spermatozoa per dose, up to Day 2 after collection, was assessed in comparison to frozen-thawed semen at 20×106 spermatozoa per dose (n=35328 inseminations). In Experiment 1, storage at 15°C resulted in the highest progressive motility (PP6 spermatozoa per dose on Day 2 of storage was reduced in comparison to frozen-thawed semen (P<0.01). In conclusion, liquid semen is versatile between storage temperatures of 5 and 22°C, but demonstrates reduced fertility on Day 2 of storage at lower sperm numbers in comparison to frozen-thawed semen.
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Kumar A, Kroetsch T, Blondin P, Anzar M. Fertility-associated metabolites in bull seminal plasma and blood serum:1H nuclear magnetic resonance analysis. Mol Reprod Dev 2015; 82:123-31. [DOI: 10.1002/mrd.22450] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 12/03/2014] [Indexed: 12/11/2022]
Affiliation(s)
- Ajeet Kumar
- Canadian Animal Genetic Resource Program; Agriculture and Agri-Food Canada; Saskatoon Research Center; Saskatoon Saskatchewan Canada
- Department of Veterinary Biomedical Sciences; Western College of Veterinary Medicine; University of Saskatchewan; Saskatoon Saskatchewan Canada
| | | | | | - Muhammad Anzar
- Canadian Animal Genetic Resource Program; Agriculture and Agri-Food Canada; Saskatoon Research Center; Saskatoon Saskatchewan Canada
- Department of Veterinary Biomedical Sciences; Western College of Veterinary Medicine; University of Saskatchewan; Saskatoon Saskatchewan Canada
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Martínez-Rodríguez C, Alvarez M, López-Urueña E, Gomes-Alves S, Anel-López L, Chamorro CA, Anel L, de Paz P. Ram spermatozoa migrating through artificial mucus in vitro have reduced mitochondrial membrane potential but retain their viability. Reprod Fertil Dev 2015; 27:852-64. [DOI: 10.1071/rd13377] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 02/10/2014] [Indexed: 11/23/2022] Open
Abstract
Sperm motility in vitro is one of the most common predictors of fertility in male screening. We propose that a mucus-penetration assay can isolate a cellular subpopulation critical to reproductive success. To this end, a device was designed with three modules (sample, test and collection) and its conditions of use evaluated (length of mucus, incubation time, mucus medium, sperm concentration and position in relation to the horizontal). The number of spermatozoa migrating and the viability and acrosomal status of the spermatozoa not migrating were calculated. The second objective was to evaluate the qualitative parameters of the spermatozoa migrating in 1.6% polyacrylamide for 30 min. The number of spermatozoa migrating and the sperm motility, viability and the acrosomal and mitochondrial status of three sperm populations (fresh, not migrating and migrating) were determined. A higher number of migrating spermatozoa were observed after 60 min of incubation, but this situation adversely affected sperm quality. The methylcellulose-based test showed a significantly lower number of migrating spermatozoa than the polyacrylamide test. The position at an angle of 45° resulted in a higher number of migrating spermatozoa in the polyacrylamide-based test. The sperm counts for three consecutive assays indicated an acceptable repeatability of the method. The viability and acrosomal status of the migrating spermatozoa showed no significant changes with regard to the control when the device was placed at 45°, whereas these parameters showed lower values at 0°. The percentage of high mitochondrial membrane potential spermatozoa was significantly reduced in the population of migrating spermatozoa.
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Progressive motility – a potential predictive parameter for semen fertilization capacity in bovines. ZYGOTE 2014; 24:70-82. [DOI: 10.1017/s0967199414000720] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
SummaryWe examined the association between progressive motility of spermatozoa andin vitrofertilization (IVF) competence of bovine ejaculates. Fresh semen was evaluated using a computerized sperm quality analyzer for bulls using progressive motility as the primary parameter. Ejaculates with high progressive motility (HPM; >81%) were compared with those with low progressive motility (LPM; <62%). Semen concentration and sperm velocity were lower (P< 0.05) in HPM versus LPM ejaculates. Volume and motile sperm concentration did not differ between groups (P> 0.05). Examination of sperm morphology revealed a higher proportion of spermatozoa with abnormal morphology (P< 0.01) in LPM versus HPM ejaculates, the predominant abnormal feature being a bent tail (P< 0.05). Sperm viability, acrosome integrity and DNA fragmentation did not differ between HPM and LPM samples. Mitochondrial membrane potential was higher (P< 0.01) in HPM versus LPM semen. Zinc concentrations in the seminal plasma correlated with progressive motility (R2= 0.463,P= 0.03). In addition, representative ejaculates from HPM and LPM groups were cryopreserved in straws and used for IVF. The proportions of embryos cleaved to 2- and 4-cell stages (88.1 ± 1.1 versus 80.5 ± 1.7,P= 0.001) and developed to blastocysts (33.5 ± 1.6 versus 23.5 ± 2.2,P= 0.026) were higher for HPM than LPM semen. The total cell number of embryos and blastocyst apoptotic index did not differ between groups. Although sperm progressive motility is associated with IVF competence, further examination is required to determine whether progressive motility can serve as a predictor of semen fertilization capacityin vivo.
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Kiernan M, Fahey AG, Fair S. The effect of the in vitro supplementation of exogenous long-chain fatty acids on bovine sperm cell function. Reprod Fertil Dev 2014; 25:947-54. [PMID: 23036717 DOI: 10.1071/rd12204] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 08/24/2012] [Indexed: 11/23/2022] Open
Abstract
This study aimed to investigate the effects of long-chain fatty acids (α-linolenic acid (ALA), docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), linoleic acid (LA), oleic acid (OA) and palmitic acid (PA)) at concentrations of 10-100 µM, on extended bull spermatozoa stored in vitro for up to 7 days. Progressive linear motion (PLM), viability (Experiments 1-3), ability to penetrate artificial mucus (Experiment 1), reactive oxygen species (ROS; Experiment 2) and superoxide production (Experiment 3) were assessed. Spermatozoa maintained the ability to penetrate artificial mucus up to Day 4, irrespective of treatment. In Experiments 2 and 3, DHA and EPA had detrimental effects on PLM and viability. PA preserved PLM and viability at levels greater than the control (P<0.05), whilst keeping ROS levels to a minimum, particularly on Days 1 and 3 (P<0.01) when ROS generation peaked in other treatments. In contrast, superoxide production peaked on Day 0 (Experiment 3) and declined thereafter with no significant effect of fatty acid. This study supports the notion that superoxide dominates on Day 0, whereas its breakdown products, hydrogen peroxide and the hydroxyl radical as assessed by CM-H2DCFDA, contribute to ROS generation on subsequent days.
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Affiliation(s)
- M Kiernan
- Department of Life Sciences, Faculty of Science and Engineering, Schrodinger Building, University of Limerick, Limerick, Ireland
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Fair S, Doyle D, Diskin M, Hennessy A, Kenny D. The effect of dietary n-3 polyunsaturated fatty acids supplementation of rams on semen quality and subsequent quality of liquid stored semen. Theriogenology 2014; 81:210-9. [DOI: 10.1016/j.theriogenology.2013.09.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/26/2013] [Accepted: 09/02/2013] [Indexed: 10/26/2022]
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Murphy C, Fahey AG, Shafat A, Fair S. Reducing sperm concentration is critical to limiting the oxidative stress challenge in liquid bull semen. J Dairy Sci 2013; 96:4447-54. [PMID: 23660140 DOI: 10.3168/jds.2012-6484] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 03/13/2013] [Indexed: 11/19/2022]
Abstract
Because of the short breeding season, the use of liquid bull semen is a viable option in seasonal grass-based dairy systems such as Ireland. Currently in Ireland, liquid bull semen contains approximately 5 million sperm per insemination dose and is used within 2.5d of collection. The hypothesis of this study was that reducing the sperm number per insemination dose would enable bull sperm to be stored for longer. Semen was collected at a commercial AI center and diluted to 1 (T1), 2 (T2), 3 (T3), 4 (T4), and 5 (T5) million sperm per 0.25-mL dose in caprogen diluent. On d 0.25 (6 h postcollection), 1, 2, 3, 4, and 5 postcollection, viability, oxidative stress, and mitochondrial activity were assessed using flow cytometry and the fluorescent probes propidium iodide, CM-H2DCFDA, and rhodamine 123, respectively. On the same days, glucose consumption, total antioxidant capacity, and progressive linear motility were assessed. We observed an effect of day and treatment on sperm cell viability, with the highest percentage live found in T 0005 and the lowest in T 0025 on all days. Oxidative stress in live sperm increased with duration of storage and was affected by treatment, being highest in T 0025 and lowest in T 0005 on all days (d 5: 56.4±2.76% and 28.8±1.22%, respectively; mean ± SEM). Both the total antioxidant capacity and percentage of live sperm positive for rhodamine 123 were unaffected by treatment. The concentration of glucose in caprogen declined with time and was lowest in T 0025 and highest in T 0005 on d 5. In conclusion, higher concentrations of sperm have detrimental effects on sperm cell viability and increase oxidative stress but have no effect on the mitochondrial activity of sperm.
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Affiliation(s)
- C Murphy
- Department of Life Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, Ireland
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Anel-López L, Álvarez-Rodríguez M, García-Álvarez O, Álvarez M, Maroto-Morales A, Anel L, de Paz P, Garde JJ, Martínez-Pastor F. Reduced glutathione and Trolox (vitamin E) as extender supplements in cryopreservation of red deer epididymal spermatozoa. Anim Reprod Sci 2012; 135:37-46. [DOI: 10.1016/j.anireprosci.2012.09.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 08/20/2012] [Accepted: 09/05/2012] [Indexed: 11/29/2022]
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Breed influences on in vitro development of abattoir-derived bovine oocytes. Acta Vet Scand 2012; 54:36. [PMID: 22682104 PMCID: PMC3502093 DOI: 10.1186/1751-0147-54-36] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 05/17/2012] [Indexed: 11/13/2022] Open
Abstract
Background There is a discrepancy in the reproductive performance between different cattle breeds. Using abattoir-derived ovaries and data base information we studied the effects of breed on in vitro fertilization and early embryo development. Methods The in vitro developmental competence of oocytes from cattle (n = 202) of Swedish Red (SR), Swedish Holstein (SH) and mixed beef breeds was compared, retrospectively tracing donors of abattoir-derived ovaries using a combination of the national animal databases and abattoir information. Age was significantly lower and carcass conformation score was higher in the beef breeds than in the dairy breeds. Cumulus oocyte complexes (n = 1351) were aspirated from abattoir-derived ovaries from animals of known breed (visual inspection confirmed through databases), age (databases), and abattoir information. Oocytes were matured, fertilized (frozen semen from two dairy bulls) and cultured according to conventional protocols. On day 8, blastocysts were graded and the number of nuclei determined. Results Cleavage rate was not different between the breeds but was significantly different between bulls. The percentage of blastocysts on day 8 was significantly higher when the oocyte donor’s breed was beef or SR than SH. There was no significant difference in blastocyst grades or stages between the breeds, but the number of nuclei in day 8 blastocysts was significantly lower in SH compared to the beef. Conclusions The use of abattoir-derived ovaries from animals whose background is traceable can be a valuable tool for research. Using this approach in the present study, oocyte donor breed was seen to affect early embryo development during in vitro embryo production, which may be a contributing factor to the declining fertility in some dairy breeds seen today.
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Shojaei H, Kroetsch T, Wilde R, Blondin P, Kastelic J, Thundathil J. Moribund sperm in frozen-thawed semen, and sperm motion end points post-thaw and post-swim-up, are related to fertility in Holstein AI bulls. Theriogenology 2012; 77:940-51. [DOI: 10.1016/j.theriogenology.2011.09.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 09/14/2011] [Accepted: 09/26/2011] [Indexed: 11/16/2022]
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Effect of duration of storage at ambient temperature on fertilizing ability and mucus penetration ability of fresh bovine sperm. Theriogenology 2011; 76:1070-5. [DOI: 10.1016/j.theriogenology.2011.05.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 04/17/2011] [Accepted: 05/04/2011] [Indexed: 11/19/2022]
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