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Gobato MLM, Segabinazzi LGTM, Scheeren VFC, Bandeira RS, Freitas-Dell'Aqua CP, Dell'Aqua JA, Papa FO. Ability of donkey sperm to tolerate cooling: Effect of extender base and removal of seminal plasma on sperm parameters and fertility rates in mares. Front Vet Sci 2022; 9:1011899. [PMID: 36225802 PMCID: PMC9548546 DOI: 10.3389/fvets.2022.1011899] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/07/2022] [Indexed: 11/15/2022] Open
Abstract
Artificial insemination using cooled-transported semen has marked importance in equine breeding programs around the world, and the high value of mules has generated avid interest in donkey semen biotechnology. However, donkey semen cools poorly in commercially available equine extenders. Therefore, this study aimed to develop approaches to improve the ability of donkey semen to tolerate cooling. Ejaculates of seven donkeys (n = 21) were cooled at 5°C for 48 h in three different extenders (milk-based, SM; sodium caseinate-based, SC; or egg yolk-based, EY) in the presence or absence of seminal plasma (centrifugation, C). Sperm motility, plasma membrane integrity (PMI), plasma membrane stability (PMS), mitochondrial membrane potential (HMMP), intracellular hydrogen peroxide (H2O2), and intracellular superoxide (O2−) were assessed before, 24 h, and 48 h post-cooling. In addition, 15 mares (163 estrous cycles) were randomly inseminated with semen from two jacks (Jack 1, n = 90; Jack 2, n = 73) previously cooled for 24 h under one of the treatments (SM, SC, EY, SM-C, SC-C, or EY-C). Groups EY, SC-C, and EY-C (P < 0.05) demonstrated superior sperm analytical parameters to SM at 24 and 48 h. Centrifugation positively affected sperm analytical parameters in cooled donkey semen extended in SM and SC (P < 0.05). Mares bred with semen extended in SC (67%, 18/27), SC-C (89%, 24/27), EY (89%, 25/28), or EY-C (74%, 20/27) had significantly greater conception rates than mares bred with SM (33%, 9/27; P < 0.05). Mares bred with SM-C had intermediate conception rates (59%, 16/27). In conclusion, SC and EY improved the cooling ability and fertility of donkey semen in horse mares, and centrifugation positively affected donkey semen extended in SM.
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Affiliation(s)
- Mariana L. M. Gobato
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Lorenzo G. T. M. Segabinazzi
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
- Ross University School of Veterinary Medicine, Basseterre, Saint Kitts and Nevis
- *Correspondence: Lorenzo G. T. M. Segabinazzi
| | - Verônica F. C. Scheeren
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Rafael S. Bandeira
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Camila P. Freitas-Dell'Aqua
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - José A. Dell'Aqua
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Frederico O. Papa
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
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Saint-Dizier M, Mahé C, Reynaud K, Tsikis G, Mermillod P, Druart X. Sperm interactions with the female reproductive tract: A key for successful fertilization in mammals. Mol Cell Endocrinol 2020; 516:110956. [PMID: 32712384 DOI: 10.1016/j.mce.2020.110956] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/22/2020] [Accepted: 07/20/2020] [Indexed: 12/15/2022]
Abstract
Sperm migration through the female genital tract is not a quiet journey. Uterine contractions quickly operate a drastic selection, leading to a very restrictive number of sperm reaching the top of uterine horns and finally, provided the presence of key molecules on sperm, the oviduct, where fertilization takes place. During hours and sometimes days before fertilization, subpopulations of spermatozoa interact with dynamic and region-specific maternal components, including soluble proteins, extracellular vesicles and epithelial cells lining the lumen of the female tract. Interactions with uterine and oviductal cells play important roles for sperm survival as they modulate the maternal immune response and allow a transient storage before ovulation. The body of work reported here highlights the importance of sperm interactions with proteins originated from both the uterine and oviductal fluids, as well as hormonal signals around the time of ovulation for sperm acquisition of fertilizing competence.
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Affiliation(s)
- Marie Saint-Dizier
- INRAE, UMR PRC, 37380, Nouzilly, France; University of Tours, Faculty of Sciences and Techniques, 37000, Tours, France.
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Hillmer M, Marth CD, Meyerholz MM, Klaus-Halla D, Schoon HA, Weber F, Schuberth HJ, Zerbe H. Gene expression in bovine endometrial cells and blood-derived neutrophils stimulated by uterine secretions. Theriogenology 2020; 157:458-466. [PMID: 32882648 DOI: 10.1016/j.theriogenology.2020.08.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/05/2020] [Accepted: 08/20/2020] [Indexed: 12/26/2022]
Abstract
Uterine epithelial cells (UEC) and migrated polymorphonuclear cells (PMN) play important roles in the uterine defence against microbial infection. The aims of the present study were to investigate i) whether undiluted uterine secretions modulate the expression of genes associated with the innate immune response in UEC and PMN in vitro, ii) whether these changes differ between the two cell populations and iii) whether uterine secretions from cows with subclinical endometritis produce a different response to those from unaffected cows. Therefore, undiluted uterine secretions, cytobrush and biopsy samples were collected from bovine uteri at a local abattoir. All cows had calved at least 3 months prior to sample collection. Subclinical endometritis was diagnosed by cytology (≥5% polymorphonuclear neutrophils) and histology. The uteri were thereby retrospectively categorised as endometritis-positive (E-pos; n = 14), if either the cytology or the histology results were positive, or endometritis-negative (E-neg; n = 17), if both diagnostics were negative. Cultured UEC responded to secretions from E-pos and E-neg cows with an increased gene expression of CXC ligand (CXCL) 8 and interleukin (IL) 6 compared to incubation with control medium alone. PMN expressed significantly higher mRNA levels of CXCL5, CXCL8 and IL1B in response to supernatant from UEC incubated with secretions from both groups (E-pos and E-neg) compared to those incubated with control medium alone. Gene expression of IL10 in uterine epithelial cells remained comparable to the control in cells exposed to E-pos secretions and was 3.6 times lower in those exposed to E-neg secretions. These results demonstrate that the expression of genes associated with the innate immune response in UEC and indirectly also PMN is affected by uterine secretions in vitro. Depending on the target gene, these changes differ between the two cell populations. UEC exposed to uterine secretions from cows without subclinical endometritis produce lower levels of IL10 compared to those exposed to secretions from affected cows or control medium alone. Therefore, the model established in this study can be used as a valuable tool to further understand the contributions of the two cell populations to the coordinated immune response in the uterus.
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Affiliation(s)
- Maren Hillmer
- Clinic for Ruminants with Ambulance and Herd Health Services, Centre of Clinical Veterinary Medicine, LMU Munich, 85764, Oberschleißheim, Germany
| | - Christina Deborah Marth
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, VIC, 3030, Australia.
| | - Marie Margarete Meyerholz
- Clinic for Ruminants with Ambulance and Herd Health Services, Centre of Clinical Veterinary Medicine, LMU Munich, 85764, Oberschleißheim, Germany
| | - Daniela Klaus-Halla
- Clinic for Ruminants with Ambulance and Herd Health Services, Centre of Clinical Veterinary Medicine, LMU Munich, 85764, Oberschleißheim, Germany
| | - Heinz-Adolf Schoon
- Institute of Pathology, Faculty of Veterinary Medicine, University of Leipzig, 04103, Leipzig, Germany
| | - Frank Weber
- Clinic for Ruminants with Ambulance and Herd Health Services, Centre of Clinical Veterinary Medicine, LMU Munich, 85764, Oberschleißheim, Germany
| | - Hans-Joachim Schuberth
- Immunology Unit, University of Veterinary Medicine Hannover Foundation, Bünteweg 2, 30559, Hannover, Germany
| | - Holm Zerbe
- Clinic for Ruminants with Ambulance and Herd Health Services, Centre of Clinical Veterinary Medicine, LMU Munich, 85764, Oberschleißheim, Germany
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Miró J, Marín H, Catalán J, Papas M, Gacem S, Yeste M. Seminal Plasma, Sperm Concentration, and Sperm-PMN Interaction in the Donkey: An In Vitro Model to Study Endometrial Inflammation at Post-Insemination. Int J Mol Sci 2020; 21:ijms21103478. [PMID: 32423134 PMCID: PMC7278951 DOI: 10.3390/ijms21103478] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/10/2020] [Accepted: 05/12/2020] [Indexed: 12/16/2022] Open
Abstract
In the donkey, artificial insemination (AI) with frozen-thawed semen is associated with low fertility rates, which could be partially augmented through adding seminal plasma (SP) and increasing sperm concentration. On the other hand, post-AI endometrial inflammation in the jenny is significantly higher than in the mare. While previous studies analyzed this response through recovering Polymorphonuclear Neutrophils (PMN) from uterine washings, successive lavages can detrimentally impact the endometrium, leading to fertility issues. For this reason, the first set of experiments in this work intended to set an in vitro model through harvesting PMN from the peripheral blood of jennies. Thereafter, how PMN, which require a triggering agent like formyl-methionyl-leucyl-phenylalanine (FMLP) to be activated, are affected by donkey semen was interrogated. Finally, we tested how four concentrations of spermatozoa (100 × 106, 200 × 106, 500 × 106 and 1000 × 106 spermatozoa/mL) affected their interaction with PMN. We observed that semen, which consists of sperm and SP, is able to activate PMN. Whereas there was a reduced percentage of spermatozoa phagocytosed by PMN, most remained attached on the PMN surface or into a surrounding halo. Spermatozoa not attached to PMN were viable, and most of those bound to PMN were also viable and showed high tail beating. Finally, only sperm concentrations higher than 500 × 106 spermatozoa/mL showed free sperm cells after 3 h of incubation, and percentages of spermatozoa not attached to PMN were higher at 3 h than at 1 h, exhibiting high motility. We can thus conclude that semen activates PMN in the donkey, and that the percentage of spermatozoa phagocytosed by PMN is low. Furthermore, because percentages of spermatozoa not attached to PMN were higher after 3 h than after 1 h of incubation, we suggest that PMN-sperm interaction plays an instrumental role in the reproductive strategy of the donkey.
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Affiliation(s)
- Jordi Miró
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Sciences, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (H.M.); (J.C.); (M.P.); (S.G.)
- Correspondence: ; Tel.: +34-93-5814273
| | - Henar Marín
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Sciences, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (H.M.); (J.C.); (M.P.); (S.G.)
| | - Jaime Catalán
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Sciences, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (H.M.); (J.C.); (M.P.); (S.G.)
| | - Marion Papas
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Sciences, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (H.M.); (J.C.); (M.P.); (S.G.)
| | - Sabrina Gacem
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Sciences, Autonomous University of Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (H.M.); (J.C.); (M.P.); (S.G.)
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, E-17003 Girona, Spain;
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, E-17003 Girona, Spain
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Abstract
Seminal fluid is often assumed to have just one function in mammalian reproduction, delivering sperm to fertilize oocytes. But seminal fluid also transmits signaling agents that interact with female reproductive tissues to facilitate conception and .pregnancy. Upon seminal fluid contact, female tissues initiate a controlled inflammatory response that affects several aspects of reproductive function to ultimately maximize the chances of a male producing healthy offspring. This effect is best characterized in mice, where the female response involves several steps. Initially, seminal fluid factors cause leukocytes to infiltrate the female reproductive tract, and to selectively target and eliminate excess sperm. Other signals stimulate ovulation, induce an altered transcriptional program in female tract tissues that modulates embryo developmental programming, and initiate immune adaptations to promote receptivity to implantation and placental development. A key result is expansion of the pool of regulatory T cells that assist implantation by suppressing inflammation, mediating tolerance to male transplantation antigens, and promoting uterine vascular adaptation and placental development. Principal signaling agents in seminal fluid include prostaglandins and transforming growth factor-β. The balance of male signals affects the nature of the female response, providing a mechanism of ‟cryptic female choiceˮ that influences female reproductive investment. Male-female seminal fluid signaling is evident in all mammalian species investigated including human, and effects of seminal fluid in invertebrates indicate evolutionarily conserved mechanisms. Understanding the female response to seminal fluid will shed new light on infertility and pregnancy disorders and is critical to defining how events at conception influence offspring health.
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Affiliation(s)
- John E Schjenken
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Sarah A Robertson
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
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Meade KG, O'Farrelly C. β-Defensins: Farming the Microbiome for Homeostasis and Health. Front Immunol 2019; 9:3072. [PMID: 30761155 PMCID: PMC6362941 DOI: 10.3389/fimmu.2018.03072] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/11/2018] [Indexed: 12/18/2022] Open
Abstract
Diverse commensal populations are now regarded as key to physiological homeostasis and protection against disease. Although bacteria are the most abundant component of microbiomes, and the most intensively studied, the microbiome also consists of viral, fungal, archael, and protozoan communities, about which comparatively little is known. Host-defense peptides (HDPs), originally described as antimicrobial, now have renewed significance as curators of the pervasive microbial loads required to maintain homeostasis and manage microbiome diversity. Harnessing HDP biology to transition away from non-selective, antibiotic-mediated treatments for clearance of microbes is a new paradigm, particularly in veterinary medicine. One family of evolutionarily conserved HDPs, β-defensins which are produced in diverse combinations by epithelial and immune cell populations, are multifunctional cationic peptides which manage the cross-talk between host and microbes and maintain a healthy yet dynamic equilibrium across mucosal systems. They are therefore key gatekeepers to the oral, respiratory, reproductive and enteric tissues, preventing pathogen-associated inflammation and disease and maintaining physiological normality. Expansions in the number of genes encoding these natural antibiotics have been described in the genomes of some species, the functional significance of which has only recently being appreciated. β-defensin expression has been documented pre-birth and disruptions in their regulation may play a role in maladaptive neonatal immune programming, thereby contributing to subsequent disease susceptibility. Here we review recent evidence supporting a critical role for β-defensins as farmers of the pervasive and complex prokaryotic ecosystems that occupy all body surfaces and cavities. We also share some new perspectives on the role of β-defensins as sensors of homeostasis and the immune vanguard particularly at sites of immunological privilege where inflammation is attenuated.
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Affiliation(s)
- Kieran G. Meade
- Animal and Bioscience Research Centre, Teagasc, Grange, Ireland
| | - Cliona O'Farrelly
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
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Mazzoni C, De Rensis F, Kirkwood RN. Effect of prior insemination of dead sperm and gestation housing management on gilt fertility. Anim Reprod Sci 2018; 195:149-152. [PMID: 29803516 DOI: 10.1016/j.anireprosci.2018.05.018] [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: 03/11/2018] [Revised: 05/15/2018] [Accepted: 05/18/2018] [Indexed: 10/16/2022]
Abstract
Danbred gilts at about 120 kg were group housed for estrous detection. At detection of estrus, gilts either remained in pens (P) or were re-housed into individual gestation stalls (S) and were inseminated (DS), or not (SC), with a dose of frozen/thawed dead semen. Groups were P-DS (n = 81), P-SC (n = 70), S-DS (n = 98) and S-SC (n = 90). All gilts were inseminated with semen containing viable sperm at the second detected estrus and 24 h later. Pregnant gilts that were stall housed were moved to pens 35 d after insemination. There were no effects of insemination or housing management on farrowing rates or litter sizes.
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Affiliation(s)
- C Mazzoni
- Department of Veterinary Medical Science, University of Parma, Parma, Italy
| | - F De Rensis
- Department of Veterinary Medical Science, University of Parma, Parma, Italy.
| | - R N Kirkwood
- School of Animal and Veterinary Sciences, University of Adelaide, SA, Australia
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Pini T, Leahy T, Paul de Graaf S. Seminal plasma and cryopreservation alter ram sperm surface carbohydrates and interactions with neutrophils. Reprod Fertil Dev 2018; 30:689-702. [DOI: 10.1071/rd17251] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/18/2017] [Indexed: 02/05/2023] Open
Abstract
Spermatozoa deposited vaginally must navigate the physical, chemical and immune barriers of the cervix to reach the site of fertilisation. Characteristics that favour successful cervical transit remain largely unknown beyond the obvious factors of motility and viability. Epididymal and cryopreserved ram spermatozoa demonstrate poor cervical transit, for unknown reasons. We hypothesised that seminal plasma exposure and cryopreservation alter the surface sugars of these sperm populations and, consequently, their interaction with immune cells, both potential factors for successful cervical transit. The carbohydrate profiles of epididymal, ejaculated and frozen–thawed ram spermatozoa were assessed by flow cytometry and western blotting using lectins for galactose, sialic acid, N-acetylglucosamine and mannose. Seminal plasma exposure and cryopreservation caused significant changes to the relative amounts of surface sugars detected by flow cytometry and lectin blotting. Immune cell interaction was characterised using a neutrophil-binding assay. Seminal plasma acted as a robust protective mechanism, limiting binding of spermatozoa, whereas the media used for cryopreservation caused a significant disruption to opsonin-mediated binding. We were unable to demonstrate a link between changes to surface sugars and neutrophil susceptibility. Seminal plasma and cryopreservation clearly alter the sperm glycocalyx, as well as the interaction of spermatozoa with immune cells.
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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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Bromfield JJ. A role for seminal plasma in modulating pregnancy outcomes in domestic species. Reproduction 2016; 152:R223-R232. [PMID: 27601714 DOI: 10.1530/rep-16-0313] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/05/2016] [Indexed: 12/21/2022]
Abstract
Seminal plasma is a complex fluid produced by the accessory glands of the male reproductive tract. Seminal plasma acts primarily as a transport medium for sperm on its arduous journey through the male and then female reproductive tract following ejaculation. This spermatozoan expedition will hopefully result in the meeting of and resultant fertilization of an oocyte, perpetuating the genetic lineage of both sexes. Whereas seminal plasma has historically been perceived as only a transport medium providing a nutrient-rich fluid environment for sperm during this exchange of genetic material, new insights into a complex communication pathway between males and females has been unraveled in the past 30 years. This new research suggests seminal plasma as a method to promote early pregnancy success by modulating cellular and molecular adaptions of the maternal environment required to facilitate healthy, successful pregnancy outcomes. Whereas much work on this exciting new communication process has focused on mice and translation to human reproduction, here we review the current evidence in domestic species where artificial insemination in the absence of seminal plasma is routine. Improving artificial insemination in domestic species to optimize offspring health and productivity could have far-reaching impacts on agriculturally relevant species such as cattle, sheep, pigs and horses.
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Affiliation(s)
- John J Bromfield
- D H Barron Reproductive and Perinatal Biology Research ProgramDepartment of Animal Sciences, University of Florida, Gainesville, Florida, USA
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Schjenken JE, Robertson SA. Seminal fluid and immune adaptation for pregnancy--comparative biology in mammalian species. Reprod Domest Anim 2015; 49 Suppl 3:27-36. [PMID: 25220746 DOI: 10.1111/rda.12383] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2014] [Indexed: 12/16/2022]
Abstract
Seminal fluid delivered to the female reproductive tract at coitus not only promotes the survival and fertilizing capacity of spermatozoa, but also contains potent signalling agents that influence female reproductive physiology to improve the chances of conception and reproductive success. Male to female seminal fluid signalling occurs in rodents, domestic and livestock animals, and all other mammals examined to date. Seminal plasma is instrumental in eliciting the female response, by provision of cytokines and prostaglandins synthesized in the male accessory glands. These agents bind to receptors on target cells in the cervix and uterus, activating changes in gene expression leading to functional adaptations in the female tissues. Sperm also interact with female tract cells, although the molecular basis of this interaction is not yet defined. The consequences are increased sperm survival and fertilization rates, conditioning of the female immune response to tolerate semen and the conceptus, and molecular and cellular changes in the endometrium that facilitate embryo development and implantation. Studies in porcine, equine, bovine, ovine and canine species all show evidence of male-female signalling function for seminal fluid. There are variations between species that relate to their different reproductive strategies and behaviours, particularly the site of seminal fluid deposition and female reproductive tract anatomy. Although the details of the molecular mechanisms require more study, the available data are consistent with both the sperm and plasma fractions of seminal fluid acting in a synergistic fashion to activate inflammation-like responses and downstream female tract changes in each of these species. Insight into the biological function and molecular basis of seminal fluid signalling in the female will inform new interventions and management practices to support optimal reproductive outcomes in domestic, livestock and endangered animal species.
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Affiliation(s)
- J E Schjenken
- School of Paediatrics and Reproductive Health, Robinson Research Institute, University of Adelaide, Adelaide, SA, Australia
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12
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Artificial insemination causes uterine hemodynamic alterations in suckled beef cows subjected to an ovulation synchronization program. Livest Sci 2014. [DOI: 10.1016/j.livsci.2014.05.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Oliveira BM, Arruda RP, Thomé HE, Maturana Filho M, Oliveira G, Guimarães C, Nichi M, Silva LA, Celeghini ECC. Fertility and uterine hemodynamic in cows after artificial insemination with semen assessed by fluorescent probes. Theriogenology 2014; 82:767-72. [PMID: 25023296 DOI: 10.1016/j.theriogenology.2014.06.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 06/09/2014] [Accepted: 06/10/2014] [Indexed: 10/25/2022]
Abstract
Fluorescent probes (propidium iodide, Hoechst 33342, fluorescein isothiocyanate-conjugated Pisum sativum agglutinin, and 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazolcarbocyanine iodide) were used to simultaneously evaluate the integrity of plasma and acrosomal membranes as well as mitochondrial membrane function in cryopreserved bovine semen and to verify its influence on fertility and postinsemination uterine vascularization. One hundred eighty-two Nellore cows were distributed for artificial insemination (AI) using semen batches separated according to the cell percentage presenting intact plasma membrane, intact acrosome, and high mitochondrial function (IPIAH): group G (44.5% IPIAH, n = 68), group M (23.0% IPIAH, n = 56), and group R (8.5% IPIAH, n = 58). The uterine hemodynamic was evaluated by Doppler sonogram in three periods: 30 hours before AI, 4 and 24 hours after AI were considered the resistance index and the uterine vascularization score. The pregnancy rate of group G (64.7%) was greater (P > 0.05) compared with group R (36.2%), but both did not differ from group M (50.0%). There was no effect (P > 0.05) of semen quality on uterine vascularization. Greater vascularization was noticed 4 hours after AI than 30 hours before and 24 hours after AI. Semen evaluation using fluorescent probes contributes to predicting fertilizing potential of semen. The use of semen with less percentage of IPIAH sperm does not alter uterine hemodynamic in cows.
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Affiliation(s)
- Bruna Marcele Oliveira
- Laboratory of Semen Biotechnology and Andrology, Center of Biotechnology in Animal Reproduction, Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), Pirassununga, São Paulo, Brazil
| | - Rubens Paes Arruda
- Laboratory of Semen Biotechnology and Andrology, Center of Biotechnology in Animal Reproduction, Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), Pirassununga, São Paulo, Brazil
| | - Helder Esteves Thomé
- Laboratory of Semen Biotechnology and Andrology, Center of Biotechnology in Animal Reproduction, Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), Pirassununga, São Paulo, Brazil
| | - Milton Maturana Filho
- Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São Paulo, Brazil
| | - Guilherme Oliveira
- Laboratory of Semen Biotechnology and Andrology, Center of Biotechnology in Animal Reproduction, Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), Pirassununga, São Paulo, Brazil
| | - Carina Guimarães
- Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São Paulo, Brazil
| | - Marcílio Nichi
- Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São Paulo, Brazil
| | - Luciano Andrade Silva
- Laboratory of Theriogenology Dr. O. J. Ginther, Department of Veterinary Medicine, FZEA, University of São Paulo (USP), Pirassununga, São Paulo, Brazil
| | - Eneiva Carla Carvalho Celeghini
- Laboratory of Semen Biotechnology and Andrology, Center of Biotechnology in Animal Reproduction, Animal Reproduction Department, College of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), Pirassununga, São Paulo, Brazil.
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Narciandi F, Lloyd A, Meade KG, O'Farrelly C. A novel subclass of bovine β-defensins links reproduction and immunology. Reprod Fertil Dev 2014; 26:769-77. [DOI: 10.1071/rd13153] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 06/06/2013] [Indexed: 12/14/2022] Open
Abstract
β-defensins are effector molecules of the innate immune system, found in many diverse species. Their presence in invertebrates as well as vertebrates suggests highly conserved functional roles. Most β-defensins are believed to act as antimicrobial agents at epithelial surfaces, although additional functions have also been described, including immune regulatory activity, wound repair and a role in coat-colour determination. High expression of β-defensins have been found in testis and epididymidal epithelium as well as in the seminal fluid of humans, macaque, rat, mouse and cow. Human and macaque β-defensins have recently been shown to affect sperm motility while a mutation in β-defensin 126 is associated with reduced fertility in men. Genetic variation in bovine defensin genes may explain the increased incidence of low fertility in cattle. Here, we present a summary of the known functions of β-defensins as well as their emerging role in reproduction and their potential to improve fertility in cattle.
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Meade KG, Cormican P, Narciandi F, Lloyd A, O'Farrelly C. Bovine β-defensin gene family: opportunities to improve animal health? Physiol Genomics 2014; 46:17-28. [DOI: 10.1152/physiolgenomics.00085.2013] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recent analysis of the bovine genome revealed an expanded suite of β-defensin genes that encode what are referred to as antimicrobial or host defense peptides (HDPs). Whereas primate genomes also encode α- and θ-defensins, the bovine genome contains only the β-defensin subfamily of HDPs. β-Defensins perform diverse functions that are critical to protection against pathogens but also in regulation of the immune response and reproduction. As the most comprehensively studied subclass of HDPs, β-defensins possess the widest taxonomic distribution, found in invertebrates as well as plants, indicating an ancient point of origin. Cross-species comparison of the genomic arrangement of β-defensin gene repertoire revealed them to vary in number among species presumably due to differences in pathogenic selective pressures but also genetic drift. β-Defensin genes exist in a single cluster in birds, but four gene clusters exist in dog, rat, mouse, and cow. In humans and chimpanzees, one of these clusters is split in two as a result of a primate-specific pericentric inversion producing five gene clusters. A cluster of β-defensin genes on bovine chromosome 13 has been recently characterized, and full genome sequencing has identified extensive gene copy number variation on chromosome 27. As a result, cattle have the most diverse repertoire of β-defensin genes so far identified, where four clusters contain at least 57 genes. This expansion of β-defensin HDPs may hold significant potential for combating infectious diseases and provides opportunities to harness their immunological and reproductive functions in commercial cattle populations.
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Affiliation(s)
- K. G. Meade
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - P. Cormican
- Animal & Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - F. Narciandi
- Comparative Immunology Group, School of Biochemistry and Immunology, Trinity College, Dublin, Ireland; and
| | - A. Lloyd
- Department of Science & Health, Carlow Institute of Technology, Co. Carlow, Ireland
| | - C. O'Farrelly
- Comparative Immunology Group, School of Biochemistry and Immunology, Trinity College, Dublin, Ireland; and
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Vilés K, Rabanal R, Rodríguez-Prado M, Miró J. Influence of seminal plasma on leucocyte migration and amount of COX-2 protein in the jenny endometrium after insemination with frozen-thawed semen. Anim Reprod Sci 2013; 143:57-63. [PMID: 24280633 DOI: 10.1016/j.anireprosci.2013.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 10/25/2013] [Accepted: 11/01/2013] [Indexed: 10/26/2022]
Abstract
After mating, seminal plasma has an immuno-modulatory effect on the endometrium in some mammals. In jennies, achieving conception via artificial insemination (AI) with frozen-thawed semen is generally much more difficult than in mares. The endometrial inflammatory response is hypothesized to be a contributing factor to the lesser fertility. Following a cross-over experimental design, the uterine inflammatory response of six jennies was evaluated at 6h after AI with frozen-thawed semen (deposited in the uterine body) in the presence or absence of autologous seminal plasma (+SP or -SP). The endometrial cytology and histology of the animals were examined by uterine lavage, uterine swabbing and biopsy. The amount of cyclooxygenase-2 (COX-2) protein in endometrial cells was also evaluated. As a control (C), the same examinations were made before any AI procedure (i.e., when the jennies were in oestrus). Large numbers of polymorphonuclear neutrophils (PMN) were observed in the -SP and +SP cytology and biopsy samples; more than in the C samples. The -SP samples also had intense COX-2 labelling; less labelling was detected in the +SP and C samples (no significant difference between these latter two types). Thus, while the presence of SP does not change the post-AI number of PMNs with regard to that detected in its absence, it does reduce COX-2 protein. Further research into the complex mix of molecules in SP and its effects during AI might help increase the pregnancy rates achieved in jennies.
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Affiliation(s)
- K Vilés
- Equine Reproduction Service, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, Autonomous University of Barcelona, Spain
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Carvalho PD, Souza AH, Sartori R, Hackbart KS, Dresch AR, Vieira LM, Baruselli PS, Guenther JN, Fricke PM, Shaver RD, Wiltbank MC. Effects of deep-horn AI on fertilization and embryo production in superovulated cows and heifers. Theriogenology 2013; 80:1074-81. [PMID: 24084230 DOI: 10.1016/j.theriogenology.2013.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/10/2013] [Accepted: 08/10/2013] [Indexed: 11/28/2022]
Abstract
The primary objective of this study was to determine the effect of site of semen deposition on fertilization rate and embryo quality in superovulated cows. The hypothesis was that deposition of semen into the uterine horns would increase the fertilization rate compared with deposition of semen into the uterine body. The secondary objective was to evaluate the effect of uterine environment on fertilization rate and embryo quality. It was hypothesized that subclinical endometritis at the onset of superstimulation would decrease the fertilization rates and embryo quality. In experiment 1, 17 superovulated heifers were randomly assigned to receive artificial insemination (AI) into the uterine body or uterine horns. The total number of fertilized structures and fertilization rate from superovulated heifers was increased (P = 0.04 and P = 0.02, respectively) when semen was deposited into the uterine horns compared with the uterine body. Other embryo characteristics did not differ based on the site of semen deposition. In experiment 2, 14 lactating dairy cows were superovulated twice and were randomly assigned to receive AI into the uterine body or deep into the uterine horns using a crossover design. Neither fertilization rate nor any other embryo characteristics were improved when semen was placed deep into the uterine horns compared with the uterine body. In experiment 3, 72 superovulated lactating dairy cows were randomly assigned to receive AI into the uterine body or uterine horns. Before initiation of superstimulatory treatments, an endometrial cytology sample was collected from each cow. Ova/embryos were collected by a nonsurgical technique at 70 ± 3 days in milk. Similar to experiment 2, neither fertilization rate nor any other embryo characteristics differed based on the site of semen deposition in experiment 3. The percentage of cows with subclinical endometritis did not differ between treatments. Interestingly, there was a tendency (P = 0.09) for a reduction in embryo recovery rate and a reduction (P = 0.01) in the fertilization rate for cows with subclinical endometritis. In conclusion, deposition of semen into the uterine horns rather than into the uterine body did not improve the fertilization rate or embryo quality in superovulated cows. Subclinical endometritis decreased the fertilization rate in superovulated cows.
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Affiliation(s)
- P D Carvalho
- Department of Dairy Science, University of Wisconsin-Madison, Wisconsin, USA
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Madej M, Hansen C, Johannisson A, Madej A. Heparin-binding proteins from boar seminal plasma affecting the release of prostaglandins and interleukin-6 by porcine endometrial and cervical cells and bovine endometrial cells. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ns.2013.57a004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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LeBlanc SJ. Interactions of Metabolism, Inflammation, and Reproductive Tract Health in the Postpartum Period in Dairy Cattle. Reprod Domest Anim 2012; 47 Suppl 5:18-30. [DOI: 10.1111/j.1439-0531.2012.02109.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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