Jeremy G. Thompson, R. Gilchrist, M. Sutton-Mcdowall
{"title":"The metabolism of the ruminant cumulus-oocyte complex revisited","authors":"Jeremy G. Thompson, R. Gilchrist, M. Sutton-Mcdowall","doi":"10.1530/BIOSCIPROCS.8.022","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.8.022","url":null,"abstract":"","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46366666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Novel concepts about normal sexual differentiation of reproductive neuroendocrine function and the developmental origins of female reproductive dysfunction: the sheep model","authors":"D. Foster, L. Jackson, V. Padmanabhan","doi":"10.1530/BIOSCIPROCS.6.006","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.6.006","url":null,"abstract":"","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42653107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"What research is needed to improve commercial pig reproduction","authors":"S. Einarsson","doi":"10.1530/biosciprocs.19.0038","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0038","url":null,"abstract":"Artificial insemination with fresh or stored semen is currently the only sperm technology used at a commercial scale in the pig industry. Attention should therefore be given for further improvement of the functionality and fertilizing ability of cryopreserved semen, as well as for sperm sorting for gender pre-selection. During the last two decades various proteins and polypeptides have been identified in boar seminal plasma, and the relevance of some of them to reproductive technologies has been discussed at this conference. The long- term goal should be to isolate/synthetize those seminal plasma proteins proven important for the spermatozoa, and use them as ingredients in media used for e.g. cryopreservation and sex sorting of semen. A close cooperation between biochemists, molecular biologists and animal scientists is necessary to reach this goal. The brought transcriptional profiling, allowing for the identification of many genes involved e.g. in mammalian gametogenesis, fertilization, and preimplantation embryo development. We do expect further progress within this field of research during coming years. The new information has also capacity to revolutionize the genetic progress within animal breeding. when using single insemination with fresh semen at fixed-time ovulation. deep with lower number, or inseminated","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45793591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Niswender, T. Davis, Griffith Rj, R. L. Bogan, K. Monser, Rebecca C. Bott, J. Bruemmer, Terry M. Nett
{"title":"Judge, jury and executioner: the auto-regulation of luteal function","authors":"G. Niswender, T. Davis, Griffith Rj, R. L. Bogan, K. Monser, Rebecca C. Bott, J. Bruemmer, Terry M. Nett","doi":"10.1530/BIOSCIPROCS.6.012","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.6.012","url":null,"abstract":"Experiments were conducted to further our understanding of the cellular and molecular mechanisms that regulate luteal function in ewes. Inhibition of protein kinase A (PKA) reduced (P< 0.05) secretion of progesterone from both small and large steroidogenic luteal cells. In addition, the relative phosphorylation state of steriodogenic acute regulatory protein (StAR) was more than twice as high (P < 0.05) in large vs small luteal cells. Large steroidogenic luteal cells appear to contain constitutively active PKA and increased concentrations of phosphorylated StAR which play a role in the increased basal rate of secretion of progesterone.","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47596078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Krawczynski, S. Bauersachs, H. Blum, M. Kaczmarek
{"title":"Next Generation Sequencing for microRNA profiling in the porcine endometrium","authors":"K. Krawczynski, S. Bauersachs, H. Blum, M. Kaczmarek","doi":"10.1530/biosciprocs.19.0019","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0019","url":null,"abstract":"","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46573434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Developmental programming of the ovine placenta","authors":"A. Fowden, J. Ward, F. Wooding, A. Forhead","doi":"10.1530/BIOSCIPROCS.7.004","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.7.004","url":null,"abstract":"","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47221659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Tamas, K. Kikuchi, H. Kaneko, J. Noguchi, K. Yoshioka, T. Nagai
{"title":"Cryopreservation of female germplasm in pigs","authors":"S. Tamas, K. Kikuchi, H. Kaneko, J. Noguchi, K. Yoshioka, T. Nagai","doi":"10.1530/biosciprocs.19.0004","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0004","url":null,"abstract":"Cryopreservation of female germplasm has basic importance in preservation and distribution of genetic lines in farm animals. Although vitrification technology has been applied for the cryopreservation of porcine oocytes and ovarian tissues, reduced developmental competence of preserved oocytes and the lack of offspring produced from them underlines the importance for further developments in cryopreservation protocols for this purpose. This review discusses the problems of female germplasm cryopreservation in pigs and the possible strategies to overcome them and gives an update on the present status of cryopreservation of porcine oocytes and ovarian tissues.","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43417337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pigs as model systems for biomedical research","authors":"H. Niemann","doi":"10.1530/biosciprocs.19.0029","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0029","url":null,"abstract":"Pigs have a long standing and very successful history as biomedical model for studying human diseases and developing novel therapies mainly attributed to the many genetic, anatomical and physiological similarities with humans. Non-transgenic pig models have long been used for a wide range of human organ systems and diseases, and even complex metabolic disorders and have served as model for developing novel surgical techniques and endoscopic approaches, such as NOTES (natural orifice transluminal endoscopic surgery). The availability of the porcine genome and novel tools to add or delete specific genes significantly expands the potential for transgenic pig production. Somatic cell nuclear transfer has emerged as the preferred method for transgenesis. Well characterized transgenic pig models have been reported for Cystic fibrosis, the eye disease Retinitis Pigmentosa, atherosclerosis and diabetes. Transgenic pigs have been produced for modeling neurological diseases, including Alzheimer and Huntington disease, specific forms of cancer, and skin diseases. Transgenic pigs play an important role in developing functional porcine xenografts to combat the growing shortage of appropriate human organs for transplantation. Other important transgenic pig models include immunodeficient pigs and Oct4/GFP transgenic pigs for studies of reprogramming. Pig models will not replace the already existing mouse models but can provide significant novel insight into a variety of diseases, as mouse models frequently do not mimic the human situation. Transgenic pigs will also soon play an increasing role in the development of novel therapies based on stem cell technology. The biomedical use of pigs will also facilitate transgenic pig production for agricultural production.","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48164358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Control of ovarian follicular development to the gonadotrophin-dependent phase: a 2006 perspective","authors":"K. McNatty, P. Smith, D. Heath, Il Juengel","doi":"10.1530/BIOSCIPROCS.6.004","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.6.004","url":null,"abstract":"","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41624770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Steroidogenesis and the initiation of parturition","authors":"A. Conley, L. Reynolds","doi":"10.1530/BIOSCIPROCS.8.028","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.8.028","url":null,"abstract":"One of the most fundamental axioms of mammalian reproduction is that pregnancy requires the support of progesterone without which it cannot be established or maintained. Though this basic physiological tenet was accepted long ago, major gaps in our understanding of the physiology of both pregnancy and parturition remain which hamper our ability to solve clinically and agriculturally significant problems such as low fertility, fetal growth restriction, preterm birth and poor neonatal outcomes. The historical reliance of our understanding of both pregnancy and parturition on this single hormone, and how it has been measured in the vast majority of studies, may represent a tangible weakness and impediment to progress. Other weaknesses include a desire to fit all species into a unified paradigm, and a reluctance to accept that physiological processes regulated by progesterone or other progestins in different tissues might vary in reliance on classic (nuclear receptor) versus other, non-classical mechanisms of action. The relative importance of these distinct response pathways in certain cells or tissues also may differ across species, as does so much of basic reproductive physiology. It is well known that certain species are reliant on luteal function throughout gestation, whereas the placenta subsumes endocrine support in others (Geisert & Conley 1998), yet progesterone alone is still believed to be the single common element. As radical as it might seem, however, progesterone may not be the single common hormone of pregnancy in mammals.","PeriodicalId":93083,"journal":{"name":"Bioscientifica proceedings","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41582090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}