Relevant bibliographies by topics / Spermatides

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Academic literature on the topic 'Spermatides'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Spermatides"

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Yushin, Vladimir, and August Coomans. "Ultrastructure of sperm development in the free-living marine nematodes of the family Chromadoridae (Chromadorida: Chromadorina)." Nematology 2, no. 3 (2000): 285–96. http://dx.doi.org/10.1163/156854100509150.

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AbstractSpermatogenesis in two species of free-living marine nematodes from the family Chromadoridae (Panduripharynx pacifica and Euchromadora robusta) was studied electron-microscopically. The spermatogonia of both species are undifferentiated polygonal cells with a large nucleus surrounded by a small amount of cytoplasm. In P. pacifica the cytoplasm of spermatocytes contains many Golgi bodies, cisternae of RER, ribosomes, mitochondria and dense spherical bodies. Filamentous material is accumulated in spermatids, which contain only mitochondria and a fragmented (or lobed) nucleus devoid of th
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Hryniewiecka-Szyfter, Zofia, Elzbieta Gabala, and Adam Babula. "THE ROLE OF SERTOLI CELLS IN THE ORGANIZATION OF SPERM BUNDLES IN THE TESTIS OF SADURIA ENTOMON (LINNAEUS, 1758) (ISOPODA, VALVIFERA)." Crustaceana 72, no. 9 (1999): 1067–78. http://dx.doi.org/10.1163/156854099504022.

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AbstractUltrastructural observations show that in Saduria entomon (L., 1758) sperm bundles are organized already in the testis, and that a crucial function in this process is played by Sertoli cells, whose protrusions are connected with maturing spermatids. The specific arrangement of maturing spermatids around a Sertoli cell protrusion and their turned-out tails lying centrally in channels reflect the arrangement of spermatozoa in a later bundle. One might assume, therefore, that the pattern along which sperm bundles are organized, which results from their specific structure, is made possible
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Rogoliński, J., P. Widłak, and J. Rzeszowska-Wolny. "Interactions of rat repetitive sequence MspI8 with nuclear matrix proteins during spermatogenesis." Acta Biochimica Polonica 43, no. 2 (1996): 319–24. http://dx.doi.org/10.18388/abp.1996_4501.

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Using the Southwestern blot analysis we have studied the interactions between rat repetitive sequence MspI8 and the nuclear matrix proteins of rat testis cells. Starting from 2 weeks the young to adult animals showed differences in type of testis nuclear matrix proteins recognizing the MspI8 sequence. The same sets of nuclear matrix proteins were detected in some fractions enriched in spermatocytes and spermatides and obtained after fractionation of testis cells of adult animals by the velocity sedimentation technique.
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Hamamah, S., C. Conord, J. M. Ayoubi, and N. Frydman. "Fécondation assistée par micro injection des spermatides: Etat des lieux et questions posées." Andrologie 8, no. 4 (1998): 362–72. http://dx.doi.org/10.1007/bf03034573.

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Özen, Oğuz Aslan, Nusret Akpolat, Ahmet Songur, et al. "Effect of formaldehyde inhalation on Hsp70 in seminiferous tubules of rat testes: an immunohistochemical study." Toxicology and Industrial Health 21, no. 9 (2005): 249–54. http://dx.doi.org/10.1191/0748233705th235oa.

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One parameter which might provide an insight into the underlying mechanism of the effect of formaldehyde (FA) inhalation on testicular tissue, is the assessment of heat shock protein 70 (Hsp70), which increases promptly in cells exposed to stress caused by chemical toxicity. Thus, following subchronic exposure at cytotoxic concentrations, we studied the immunohistochemical effect of FA inhalation on changes in Hsp70 content in testicular tissue. We used 18 albino Wistar rats divided into three groups, exposed to 0 (control), 5 and 10 ppm FA gas for a total of 91 days, 8 h/day, five days a week
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Kumar, A., S. Raut, and N. H. Balasinor. "Endocrine regulation of sperm release." Reproduction, Fertility and Development 30, no. 12 (2018): 1595. http://dx.doi.org/10.1071/rd18057.

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Spermiation (sperm release) is the culmination of a spermatid’s journey in the seminiferous epithelium. After a long association with the Sertoli cell, spermatids have to finally ‘let go’ of the support from Sertoli cells in order to be transported to the epididymis. Spermiation is a multistep process characterised by removal of excess spermatid cytoplasm, recycling of junctional adhesion molecules by endocytosis, extensive cytoskeletal remodelling and final spermatid disengagement. Successful execution of all these events requires coordinated regulation by endocrine and paracrine factors. Thi
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Dadoune, Jean-Pierre, Marie-Francoise Alfonsi, and Marcelle-Anne Fain-Maurel. "Donnees ultrastructurales et cytochimiques sur l'organisation du nucleole dans les spermatides jeunes chez les primates." Biology of the Cell 63, S1 (1988): 20–20. http://dx.doi.org/10.1016/0248-4900(88)90184-0.

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Cameron, D. F., and K. E. Muffly. "Hormonal regulation of spermatid binding." Journal of Cell Science 100, no. 3 (1991): 623–33. http://dx.doi.org/10.1242/jcs.100.3.623.

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A Sertoli-spermatid coculture model is described in which a large percentage (greater than 76%) of round spermatids remain viable for 48 h and bind to Sertoli cells. The effects of follicle-stimulating hormone (FSH) and testosterone on spermatid binding (expressed as the spermatid density; SD = the number of spermatids per unit area of Sertoli cell cytoplasm), ultrastructure of the Sertoli-spermatid junctional complex, and distribution in the Sertoli cell of junction-related F-actin and vinculin are described. Following 48 h of incubation, neither FSH alone nor testosterone alone affected sper
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Ogura, Atsuo, Ryuzo Yanagimachi, and Noriko Usui. "Behaviour of hamster and mouse round spermatid nuclei incorporated into mature oocytes by electrofusion." Zygote 1, no. 1 (1993): 1–8. http://dx.doi.org/10.1017/s0967199400001234.

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summaryRound spermatids of the hamster and mouse were electrofused with homologous mature oocytes to examine the behaviour of their nuclei within the ooplasm. A single spermatid was inserted in the perivitelline space of a mature oocyte and an electric fusion pulse given. In the hamster, the best spermatid-oocyte fusion took place when the oocytes were pretreated with neuraminidase, subjected to 30 s AC (2 MHz, 20 V/cm) followed by a single fusion DC pulse (3000 V-cm, 10 μs) and another 30 s AC current. Inclusion of micromolar Ca2+ and Mg2+ in the fusion medium was essential for oocyte activat
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Tanaka, Atsushi, Motoi Nagayoshi, Youichi Takemoto, et al. "Fourteen babies born after round spermatid injection into human oocytes." Proceedings of the National Academy of Sciences 112, no. 47 (2015): 14629–34. http://dx.doi.org/10.1073/pnas.1517466112.

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During the human in vitro fertilization procedure in the assisted reproductive technology, intracytoplasmic sperm injection is routinely used to inject a spermatozoon or a less mature elongating spermatid into the oocyte. In some infertile men, round spermatids (haploid male germ cells that have completed meiosis) are the most mature cells visible during testicular biopsy. The microsurgical injection of a round spermatid into an oocyte as a substitute is commonly referred to as round spermatid injection (ROSI). Currently, human ROSI is considered a very inefficient procedure and of no clinical
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Dissertations / Theses on the topic "Spermatides"

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Leduc, Frédéric. "Caractérisation initiale de l'instabilité génétique des spermatides de mammifères." Thèse, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6240.

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La spermatogenèse est un processus complexe permettant la génération de gamètes mâles ultra spécialisés, les spermatozoïdes. Plusieurs réorganisations successives de l'ADN sont essentielles pour la génération de gamètes mâles haploïdes, dont l'enjambement durant la méiose. La dernière étape de la spermatogenèse, la spermiogenèse, comporte une importante réorganisation nucléaire accompagnée de nombreuses cassures bicaténaires d'ADN, ce qui pourrait mener à une instabilité génétique, surtout dans ce contexte haploïde vulnérable. Le premier objectif de mes recherches était de mieux caractériser c
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Ziyyat, Ahmed. "Séparation de spermatides rondes par cytométrie en flux et expression génique durant le développement préimplantatoire après microinjection de la spermatide dans l'ovocyte de souris." Paris 11, 2000. http://www.theses.fr/2000PA11T062.

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La spermatogenèse peut être anormalement altérée à tous les stades, conduisant à l'azoospermie et à l'infertilité. La microinjection de spermatides (ROSI) peut pallier cette déficience en spermatozoïdes. Pour déterminer la faisabilité de la ROSI et ses conséquences sur le développement, nous avons mis au point une technique de séparation des spermatides chez la souris et l'homme : la cytométrie en flux couplée à un tri cellulaire. La population triée est homogène et exprime les marqueurs spécifiques de la spermatide. Cette technique ne permet pas d'isoler des spermatides dans les éjaculats d'h
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Borghol, Nada. "Mécanismes épigénétiques et aide médicale à la procréation : évaluation de la maturation in vitro des ovocytes humains et de la fécondation avec des spermatides rondes murines." Lyon 1, 2006. http://www.theses.fr/2006LYO10083.

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La méthylation de l'ADN et l'acétylation des histones sont deux modifications épigénétiques impliquées dans différents processus biologiques. Les techniques d'aide médicale à la procréation sont susceptibes d'interférer avec la programmation épigénétique dans les gamètes et les embryons. Afin d'évaluer ce risque, nous avons déterminé le profil de méthylation du gène H19, soumis à empreinte parentale, dans des ovocytes humains après leur maturation in vitro. Nos résultats montent que H19 présente le profil maternel normal dès le stade vésicule germinale. La maturatiion in vitro des ovocytes ne
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Holdcraft, Robert Wesley. "Regulation of spermatogenesis by androgen receptor : effect of hypomorphic and cell-specific mutations /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/10249.

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Lussier, Stéphanie. "Action hormonale sur le protéome du spermatide." Sherbrooke : Université de Sherbrooke, 2005.

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Lussier, Stéphanie. "Action hormonale sur le protéome du spermatide." Mémoire, Université de Sherbrooke, 2005. http://savoirs.usherbrooke.ca/handle/11143/3378.

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Mon projet est de développer un système d'analyse protéique bidimensionnelle du protéome nucléaire du spermatide qui nous permettra de voir si une variation de l'expression des gonadotropines affecte les protéines impliquées dans la spermiogenèse. Différentes méthodes ont été expérimentées, mais n'atteignaient pas les objectifs visés. La technique convenant le plus à nos attentes a été mise sur pied en utilisant, en première dimension, une méthode de séparation par focalisation isoélectrique modifiée, appelée IPG, et un gel d'électrophorèse de type acide-urée. Pour induire la variation des gon
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Kichine, Elsa. "Spermiogenèse et infertilité masculine : étude des transcrits du gène UBA1, codant pour l'enzyme activatrice de l'ubiquitine et évaluation génétique de deux variants dans le gène PRM1 codant pour la protamine1." Thesis, Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX20677.

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Les gènes du chromosomeX sont majoritairement inactivés au cours de la méiose mâle. Chez la souris, seulement 6% d’entre eux sont réactivés au cours des stades post-méiotiques. Parmi eux le gène Uba1X codant pour l’enzyme activatrice de l'ubiquitine, UBA1 qui produit trois transcrits dont deux sont ubiquitaires mais le troisième prédomine dans les cellules post¬-méiotiques : les spermatides. Nos travaux montrent que les 5’UTR, seul différence entre ces trois transcrits, déterminent la localisation et la dose relative des isoformes nucléaire et cytoplasmique de la protéine UBA1. Nous avons mis
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ZOUARI, RAOUDHA. "Autoanticorps antispermatozoides humains et fonctions spermatiques." Paris 6, 1992. http://www.theses.fr/1992PA066643.

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Les antoanticorps antispermatozoides presents chez certains sujets infertiles peuvent empecher les fonctions spermatiques en agissant sur une ou plusieurs etapes de la physiologie du spermatozoides humain. Dans cette etude, nous avons demontre, in vitro, la repercussion des anticorps elues a partir des spermatozoides de sujets infertiles, sur certaines fonctions spermatiques: parametres du mouvement en conditions non capacitantes et capacitantes, reaction acrosomique induite par ionophore, fixation a la zone pellucide humaine, penetration d'ovocytes depellucides de hamster. L'origine polyclona
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Jackson, Edward William. "David Foster Wallace's hideous neoliberal spermatics." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8538/.

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This thesis investigates male sexuality and neoliberalism in the work of David Foster Wallace. I argue that his texts conceive of male sexuality through neoliberal logics regarding responsibility, risk, contract, property, and austerity. Informing such conceptions are spermatic metaphors of investment, waste, blockage, and release. These dynamics allow Wallace’s texts to ground masculinity in an apparently incontestable sexual hideousness, characterised in particular by negativity and violence. By figuring male sexuality as a neutral economic issue, and one that lends itself to spermatic metap
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Grégoire, Marie-Chantal. "Cartographie des cassures bicaténaires du remodelage chromatinien du spermatide et développement des outils techniques associés." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9715.

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Résumé : La phase haploïde de la spermatogenèse (spermiogenèse) est caractérisée par une modification importante de la structure de la chromatine et un changement de la topologie de l’ADN du spermatide. Les mécanismes par lesquels ce changement se produit ainsi que les protéines impliquées ne sont pas encore complètement élucidés. Mes travaux ont permis d’établir la présence de cassures bicaténaires transitoires pendant ce remodelage par l’essai des comètes et l’électrophorèse en champ pulsé. En procédant à des immunofluorescences sur coupes de tissus et en utilisant un extrait nucléaire haute
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Books on the topic "Spermatides"

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David Foster Wallace's Toxic Sexuality: Hideousness, Neoliberalism, Spermatics. Bloomsbury Publishing Plc, 2020.

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Book chapters on the topic "Spermatides"

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Guraya, Sardul S. "Spermatids and Spermiogenesis." In Biology of Spermatogenesis and Spermatozoa in Mammals. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71638-6_5.

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Shamanski, Fay L., Paul J. Turek, and Roger A. Pedersen. "Spermatids: Clinically Useful Gametes?" In The Testis. Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-2106-7_21.

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Heppner, John B., David B. Richman, Steven E. Naranjo, et al. "Spermatid (pl., spermatozoa)." In Encyclopedia of Entomology. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_4303.

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Aslam, I., and S. Fishel. "The Use of Spermatids for Human Conception." In Signal Transduction in Testicular Cells. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-03230-5_13.

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Lin, Ting-Yi, M. Jodeane Pringle, and Margaret T. Fuller. "Regulation of Meiosis and Spermatid Differentiation in Drosophila Primary Spermatocytes." In The Testis. Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-2106-7_11.

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Jégou, Bernard, Viqar Syed, Pascal Sourdaine, et al. "The Dialogue Between Late Spermatids and Sertoli Cells in Vertebrates: A Century of Research." In Spermatogenesis — Fertilization — Contraception. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-662-02815-5_4.

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Oosterhuis, Jessica H., and Frans A. Van Der Hoorn. "CREMτ Activates the Spermatid-Specific RT7 and Mouse Protamine 1 Promoters." In Cellular and Molecular Regulation of Testicular Cells. Springer New York, 1996. http://dx.doi.org/10.1007/978-1-4612-2374-0_6.

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de Lange, D. C. D., and A. A. B. Lycklama à. Nijeholt. "Wat is de oorzaak van pijn in het verloop van de funiculus spermaticus?" In Vademecum permanente nascholing huisartsen. Bohn Stafleu van Loghum, 2006. http://dx.doi.org/10.1007/978-90-313-8808-0_1822.

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Morton, Daniel G., Steven E. Weisbrode, William E. Wyder, James K. Maurer, and Charles C. Capen. "Spermatid Giant Cells, Tubular Hypospermatogenesis, Spermatogonial Swelling, and Cytoplasmic Vacuoles in Testes of Laboratory Rabbits." In Genital System. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-72550-0_27.

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Girardin, Richard. "St. Bonaventure’s Illumination Theory of Cognition as the Framework for the Logos Spermatikos in Jacques Dupuis’ Inclusive Pluralism." In Catholicism Engaging Other Faiths. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-98584-8_10.

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Reports on the topic "Spermatides"

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Dolan, Cheryl E. Structural and Functional Studies of the Protamine 2-Zinc Complex from Syrian Gold Hamster (Mesocricetus Auratus) Spermatids and Sperm. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/15014805.

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Balhorn, R., N. V. Hud, M. Corzett, and J. Mazrimas. Importance of protamine phosphorylation to histone displacement in spermatids: can the disruption of this process be used for male contraception. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/641337.

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Journal articles Dissertations / Theses
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