Bioscientifica proceedings最新文献_第8页

Inhibin and secretion of FSH in oestrous cycles of cows and pigs 奶牛和猪发情周期中卵泡刺激素的抑制素和分泌

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/BIOSCIPROCS.2.012

K. Taya, H. Kaneko, Gen Watanabe, S. Sasamoto

引用次数: 27

Putative role of cocaine- and amphetamine-regulated transcript (CARTPT) in dominant follicle selection in cattle 可卡因和苯丙胺调节转录物（CARPT）在牛优势卵泡选择中的假定作用

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/BIOSCIPROCS.7.008

George W. Smith, A. Sen, J. Folger, J. Ireland

引用次数: 0

Current progress in non-surgical embryo transfer with fresh and vitrified/warmed pig embryos 用新鲜和玻璃化/温热猪胚胎进行非手术胚胎移植的最新进展

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/biosciprocs.19.0010

E. Martinez, E. A. Gil, C. Cuello, J. Sanchez-Osorio, J. Gomis, I. Parrilla, M. Angel, H. Rodríguez-Martínez, X. Lucas, J. Vazquez, J. M. Vázquez, J. Roca

{"title":"Current progress in non-surgical embryo transfer with fresh and vitrified/warmed pig embryos","authors":"E. Martinez, E. A. Gil, C. Cuello, J. Sanchez-Osorio, J. Gomis, I. Parrilla, M. Angel, H. Rodríguez-Martínez, X. Lucas, J. Vazquez, J. M. Vázquez, J. Roca","doi":"10.1530/biosciprocs.19.0010","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0010","url":null,"abstract":"Embryo transfer (ET) should play a critical role in the pig industry because it allows the movement and introduction of new genetic material into a herd with minimal risk of disease transmission and reduced transportation costs. In addition, embryo movement could prevent the potential health and welfare problems associated with transporting live pigs. Although the first successful ET was reported more than 60 years ago, the commercial use of this procedure in pigs is still in its infancy. The surgical requirements for embryo collection and transfer and the difficulties with embryo cryopreservation have prevented its use in pigs, unlike other livestock. However, new methodologies have been developed in the past decade to enable successful non-surgical ET and embryo cryopreservation that could allow the commercial use of ET in the pig industry. This review focuses on the development of these technologies with emphasis on our own findings. Specifically, we discuss the basic aspects of a non-surgical deep-uterine ET procedure and describe several factors that affect its efficacy in the transfer of fresh and short-term cultured embryos. Finally, we conclude with a brief discussion on the use of this procedure with long-term stored embryos.","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":"48537948","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}

引用次数: 5

Determining piglet survival 仔猪存活率的测定

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/biosciprocs.19.0014

E. Baxter, S. Edwards

引用次数: 6

Gene networks in the embryo and endometrium related to embryo survival 胚胎和子宫内膜中与胚胎存活相关的基因网络

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/BIOSCIPROCS.8.006

M. Hoelker, D. Salilew-Wondim, E. Held, D. Tesfaye, K. Schellander

{"title":"Gene networks in the embryo and endometrium related to embryo survival","authors":"M. Hoelker, D. Salilew-Wondim, E. Held, D. Tesfaye, K. Schellander","doi":"10.1530/BIOSCIPROCS.8.006","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.8.006","url":null,"abstract":"Low fertility is one of the major problems limiting the efficiency of the dairy industry. Successful pregnancy establishment and development to term depend on the suitability of the endometrial environment and the intrinsic quality of the embryo. Accurate assessment of both, however, is challenging. Therefore, the present survey reviews current knowledge of the molecular networks in the endometrium related to pregnancy establishment and maintenance to term. Accordingly, distinct molecular signatures of the bovine endometrium, elucidated by innovative approaches, could be correlated with pregnancy success. However, not only must the reproductive tract provide a suitable environment but the embryo itself must be competent to express its developmental program. Numerous studies have correlated molecular networks of bovine embryos with their developmental capacity. However, most studies were, by their nature, invasive and the findings were therefore difficult to extrapolate beyond the developmental stages examined. Hence, a second aim is to present new strategies employing embryo biopsies for a direct connection between molecular signatures and embryo developmental capacity. Large scale differences, at the molecular level, were reported for blastomeres whose counterparts developed to the blastocyst stage compared to those with lower developmental competence, thus unraveling distinct molecular fingerprints related to ability to develop to the blastocyst stage. Similarly, distinct molecular signatures at the blastocyst stage were associated with embryo developmental competence to term. In summary, further understanding of molecular signatures related to endometrial receptivity and embryo developmental capacity has been gained from novel innovative strategies including embryo microdissection as well as by examining endometrial samples collected in the cycle preceding the one in which conception occurs.","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":"49029984","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}

引用次数: 0

Porcine pluripotent stem cells and their differentiation 猪多能干细胞及其分化

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/biosciprocs.19.0028

T. Ezashi, R. M. Roberts

{"title":"Porcine pluripotent stem cells and their differentiation","authors":"T. Ezashi, R. M. Roberts","doi":"10.1530/biosciprocs.19.0028","DOIUrl":"https://doi.org/10.1530/biosciprocs.19.0028","url":null,"abstract":"In some situations, the pig has advantages over the mouse as a model in biomedical research. The availability of pluripotent cell lines is likely to broaden this appeal. Here we review progress in the derivation and characterization of embryonic stem cells (ESC) and induced pluripotent lines (iPSC) from pigs. Until recently, most porcine ESC failed to meet the full criteria for pluripotency, but that may be changing as more becomes known about the culture conditions required to maintain epiblast outgrowths from early porcine conceptuses in an undifferentiated, self-renewing state. In addition, porcine iPSC cells have been generated, some with the features of FGF2-dependent epiblast-type cells, typified by human ESC, and others that require LIF and resemble the “ground state”, na ï ve-type mouse ESC. Despite these successes, incomplete reprogramming and loss of pluripotency when selection conditions are relaxed continue to be problems that must be overcome if the full potential of iPSC is to be realized. The most immediate value of iPSC may relate to their ability to proliferate almost indefinitely in culture, thus enabling more complex genetic manipulations of the genome through growth selection than could be performed in other cell types. The “undifferentiated” state of iPSC may also allow improved cloning efficiency, although this remains to be proved. Finally, the pig will likely prove useful in testing stem cell-based therapies, although only a limited number of experiments demonstrating that the porcine iPSC can be directed to transform into more specialized sub-lineages and then form functional grafts have been performed.","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":"46729242","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}

引用次数: 0

Roles of selected nutrients in development of the porcine conceptus during pregnancy 所选营养素在猪妊娠期妊娠发育中的作用

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/biosciprocs.19.0016

W. B. Fuller, K. Jinyoung, Song Gwonhwa, Ka Hakhyun, W. Guoyao, G. A. Johnson, J. Vallet

引用次数: 3

Assisted reproduction in Mediterranean wild ruminants: lessons from the Spanish ibex (Capra pyrenaica) 地中海野生反刍动物的辅助繁殖:来自西班牙野山羊(Capra pyrenaica)的经验

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/BIOSCIPROCS.7.031

J. Santiago-Moreno, M. A. Coloma, A. Toledano-Díaz, C. Castaño, A. Gómez-Brunet, A. López-Sebastián

引用次数: 0

Use of the Immunocrit to monitor a split-suckle program in commercial production 在商业化生产中使用免疫批判技术来监测裂吸程序

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/biosciprocs.19.0024

JL Vallet

引用次数: 1

Corpus luteum regression or maintenance: a duel between prostaglandins and interferon tau 黄体退化或维持：前列腺素和干扰素τ之间的决斗

Bioscientifica proceedings Pub Date : 2019-04-05 DOI: 10.1530/BIOSCIPROCS.8.024

R. Meidan

{"title":"Corpus luteum regression or maintenance: a duel between prostaglandins and interferon tau","authors":"R. Meidan","doi":"10.1530/BIOSCIPROCS.8.024","DOIUrl":"https://doi.org/10.1530/BIOSCIPROCS.8.024","url":null,"abstract":"The corpus luteum (CL), via progesterone production, plays a central role in the regulation of cyclicity and in the establishment and maintenance of pregnancy in ruminant species. In the absence of an embryonic signal, the CL will regress functionally and then structurally. Pulses of prostaglandin F2α (PGF2α) from the uterus reach the ovary via the vascular utero-ovarian plexus causing the demise of the CL. Although it is well established that PGF2α is the principal luteolytic hormone in ruminants, many aspects of its function are still being debated. The successful establishment of pregnancy requires inhibition of uterine PGF2α actions, prolongation, or maintenance of luteal function and the continuous secretion of progesterone. The conceptus signals its presence by releasing interferon tau (IFNT). IFNT acting directly on the endometrium by various mechanisms and possibly also on the CL activates antiluteolytic responses that protect the function of the CL. PGE2, synthesized by the endometrium and the CL, could also induce processes that are important for maintenance of luteal function in pregnancy. The mechanisms controlling luteal regression or its maintenance by the coordinated actions of PGF2α, IFNT, and PGE2 are discussed.","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":"49386463","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}

引用次数: 0