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Showing 1 to 20 of 73 for “"oogenesis"”.
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Transcriptional regulation of mosquito oogenesis
… of <i>Ae. triseriatus</i> and <i>Ae. aegypti</i> oogenesis. TOR and many other proteins with previously unknown function are transcriptionally regulated during apoptosis and autophagy in mosquito ovaries during oogenesis.</p>
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OOGENESIS IN TUBULARIA LARYNX AND TUBULARIA INDIVISA (HYDROZOA, ATHECATA)
<p>In Tubularia larynx and T. indivisa, interstitial cells proliferate in the ectoderm of the gonophore stalk and peduncle of the raceme and migrate in the endoderm to the apex of the young gonophore buds where they proliferate in the endoderm to form the entocodon and germ cell mass. Eggs are …
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Characterization of the Drosophila Egfl7/8 ortholog during oogenesis
… signals that trigger apoptosis during Drosophila oogenesis. Drosophila ovaries are composed of approximately 16-20 ovarioles, each of which contains a series of egg chambers that are proceeding through the 14 stages of oogenesis moving from the germarium toward the oviduct. For the mature egg to …
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piRNA-dependent transcriptional gene silencing during Drosophila oogenesis and embryogenesis
The PIWI-interacting RNA (piRNA) pathway is a small RNA based intracellular immune system protecting animal gonads from the deleterious effects of transposons, thus maintaining transgenerational genome integrity. In Drosophila melanogaster ovaries, piRNA-Piwi complexes localise to the nucleus and …
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An Ultrastructural and Histochemical Study of Oogenesis in Marchantia Polymorpha
Made available in DSpace on 2014-12-11T18:28:19Z (GMT). No. of bitstreams: 1 7115014.pdf: 5256283 bytes, checksum: f19791f94f821d852d96371f9817394c (MD5) Previous issue date: 1970
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The Small GTPase Rheb Is Required for Spermatogenesis but not Oogenesis
The process of germ cell development is under the tight control of various signaling pathways among which the PI3K-PKB-mTOR pathway is of critical importance. Previous studies have demonstrated sex-specific roles for several components of this pathway. In the current study I aimed to evaluate the …
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Oogenesis of Ostertagia circumcincta, a parasitic nematode of the abomasum of sheep
Ostertagia circumcincta, a parasitic nematode of sheep, known collectively with the O. trifuroata, the smaller trichostrongyles and several other worms of the same genus Ostertagia, as the "brown hair worms of sheep”, has held a rather obscure position in the evaluation of the importance of the …
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The Roles of the Drosophila Protein Tribbles in Oogenesis and Insulin Signaling Pathway
… melanogaster protein Tribbles (Trbl) during oogenesis and larval development. Trbl is the founding member of an evolutionarily conserved family of kinase proteins that play diverse roles in cell signaling and energy homeostasis. In addition to the central Serine/Threonine kinase domain, …
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Functional characterization of the role of Imp, a Drosophila mRNA binding protein, during oogenesis
Establishment of cell polarity requires the involvement of several posttranscriptional regulatory mechanisms, including mRNA localization and translational control. A family of highly conserved RNA binding proteins in vertebrates, VICKZ (V̲g1RBP/V̲era, I̲MP-1, 2, 3, C̲RD-BP, K̲OC, Z̲BP-1) proteins, …
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A Comparison of Fine Structural and Functional Changes During Oogenesis and Cleavage in Regulative and Mosaic Embryos
Made available in DSpace on 2015-05-13T22:12:00Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6604316.PDF: 4717200 bytes, checksum: ebdacc7a7d575b01ad2eb15c9491ee16 (MD5) Previous issue date: 1965
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Spermatogenesis and oogenesis of Haemonchus contortus, a nematode parasitic in the abomasum of sheep and other ruminants
… a study has been made of spermatogenesis and oogenesis with some attention directed to methods of copulation, the passage of the sperm cells upon entrance into the vulva and the anatomical location in the female where the sperms are collected for the purpose of fertilization of the ova. No …
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Oocyte differentiation is genetically dissociable from the meiotic program in mice
Oogenesis is a developmental program by which a gametogenesis-competent germ cell becomes a fertilization-competent egg. During oogenesis, growth and differentiation of oocytes are closely coordinated with initiation and progression through meiosis. In mammals, the timing of meiotic initiation is …
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Characterizing the Role of Spegless, a Novel Inner Nuclear Membrane Protein required for spermatogenesis and oogenesis in Drosophila melanogaster
Fat is a large cadherin that plays a role in both tissue growth and planar cell polarity (PCP). How Fat regulates these cellular processes is not fully understood. A yeast two-hybrid screen previously identified proteins that can bind the cytoplasmic domain of Fat. Using genome-wide RNAi libraries …
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Prenatal exposure to di-(2-ethylhexyl) phthalate and high-fat diet synergistically disrupts mouse fetal oogenesis and affects folliculogenesis
… (20 µg/kg body weight/day) and high-fat diet on oogenesis and folliculogenesis. To fulfill that goal, female CD-1 mice were fed with a high-fat diet (45 kcal% fat) or a control diet (10 kcal% fat) one week before mating and during pregnancy and lactation. The pregnant mice were orally dosed with …
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Stage-specific profiling of the transcriptome during oogenesis and identification of a novel type of small RNA within the zebrafish ($\textit{Danio rerio}$)
… prior to fertilization, during egg development (oogenesis). The oocyte goes through many important changes in gene expression, chromatin conformations, meiotic stages and maturation processes during oogenesis, all of which are essential for normal embryonic development. In this thesis, I have …
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Drosophila Cyclin J And The Somatic Pirna Pathway Cooperate To Regulate Germline Stem Cells
… pathway gene, armitage (armi). Here I assessed oogenesis in CycJ null in the presence or absence of mutations in armi or other piRNA pathway genes. Although CycJ null flies had decreased egg laying and hatching rates, ovaries appeared normal indicating that CycJ is dispensable for oogenesis …
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Modification of fecundity and fertility during oogenesis by gamma radiation and/or ozone with a cytological analysis in the ectoparasitic wasp, Habrobracon juglandis (Ashmead)
In Experiment I, adult female wasps were exposed to 44.1 ppm ozone for 0, 2, 4, 6, 8, 10, 12, 16, 24, and 27 h. The results indicated that the 27 h of ozone exposure produced 100% lethality on the first day. Exposures below 27 h progressively decreased life span with increasing length of exposure. …
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Isolation, characterisation and in vitro potential of Oogonial stem cells
… cells’ in vitro potential, both to undergo neo-oogenesis and as a model for germ cell development. Putative bovine and human OSCs were isolated from disaggregated adult ovarian cortex using a previously validated fluorescence-activated cell sorting (FACS)-based technique, with cells sorted for …
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