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(ovogenesis ovigenesis)
10,308 results
  • Cytogenetic mechanisms of unisexuality in rock lizards. [Journal Article]
    Sci Rep. 2020 May 26; 10(1):8697.Spangenberg V, Arakelyan M, … Kolomiets O
  • Darevskia rock lizards is a unique complex taxa, including more than thirty species, seven of which are parthenogenetic. In mixed populations of Darevskia lizards, tri- and tetraploid forms can be found. The most important issues in the theory of reticulate evolution of Darevskia lizards are the origin of parthenogenetic species and their taxonomic position. However, there is little data on how m…
  • Brain Control Reproduction by the Endocrine System of Female Blue Gourami (Trichogaster trichopterus). [Review]
    Biology (Basel). 2020 May 21; 9(5)Degani G
  • Blue gourami belongs to the Labyrinithici fish and the Anabantiform order. It is characterized by a specific organ located above its gills for the respiration of atmospheric oxygen. This specific adaptation to low oxygen levels affects reproduction that is controlled by the brain, which integrates different effects on reproduction mainly through two axes-the gonadotropic brain pituitary gonad axi…
  • Intrafollicular barriers and cellular interactions during ovarian follicle development. [Journal Article]
    Anim Reprod. 2019 Oct 23; 16(3):485-496.Andrade GM, Del Collado M, … Perecin F
  • Follicles are composed of different interdependent cell types including oocytes, cumulus, granulosa, and theca cells. Follicular cells and oocytes exchange signaling molecules from the beginning of the development of the primordial follicles until the moment of ovulation. The follicular structure transforms during folliculogenesis; barriers form between the germ and the somatic follicular cells, …
  • Prostaglandins regulate invasive, collective border cell migration. [Journal Article]
    Mol Biol Cell. 2020 May 20 [Online ahead of print]Fox EF, Lamb MC, … Tootle TL
  • While prostaglandins (PGs), short-range lipid signals, regulate single cell migration, their roles in collective migration remain unclear. To address this, we use Drosophila border cell migration, an invasive, collective migration that occurs during Stage 9 of oogenesis. Pxt is the Drosophila cyclooxygenase-like enzyme responsible for PG synthesis. Loss of Pxt results in both delayed border cell …
  • Isolation of stage-specific germ cells using FACS in Drosophila germarium. [Journal Article]
    Methods Cell Biol. 2020; 158:11-24.Vallés AM, Huynh JR
  • Drosophila melanogaster oogenesis is a versatile model system to address many fundamental questions of cell and developmental biology, such as stem cell biology, mitosis, meiosis or cell polarity. Many mutagenesis and powerful genetic tools have contributed massively to identify and dissect in vivo gene functions in a stage and tissue specific manner. However, the small number of germ cells durin…
  • Methods for Assessing Fertility in C. elegans from a Single Population. [Journal Article]
    Methods Mol Biol. 2020; 2144:91-102.Yen CA, Curran SP
  • Reproductive senescence occurs in a wide range of species with mechanistic aspects that are conserved from Caenorhabditis elegans to humans. Genetic and environmental factors can influence fertility and reproductive output can impact rates of aging. The C. elegans Bristol N2 strain commonly used in laboratories is hermaphroditic, producing a defined number of sperm during larval development befor…
  • In vitro ovarian follicle growth: a comprehensive analysis of key protocol variables. [Journal Article]
    Biol Reprod. 2020 May 14 [Online ahead of print]Simon LE, Kumar TR, Duncan FE
  • Folliculogenesis is a complex process that requires integration of autocrine, paracrine, and endocrine factors together with tightly regulated interactions between granulosa cells and oocytes for the growth and survival of healthy follicles. Culture of ovarian follicles is a powerful approach for investigating folliculogenesis and oogenesis in a tightly controlled environment. This method has ena…
  • Established and Novel Mechanisms Leading to de novo Genomic Rearrangements in the Human Germline. [Journal Article]
    Cytogenet Genome Res. 2020 May 09 [Online ahead of print]Hattori A, Fukami M
  • During gametogenesis, the human genome can acquire various de novo rearrangements. Most constitutional genomic rearrangements are created through 1 of the 4 well-known mechanisms, i.e., nonallelic homologous recombination, erroneous repair after double-strand DNA breaks, replication errors, and retrotransposition. However, recent studies have identified 2 types of extremely complex rearrangements…
  • A novel pattern of germ cell divisions in the production of hymenopteran insect eggs. [Journal Article]
    Biol Lett. 2020 May; 16(5):20200137.Eastin KJ, Huang AP, Ferree PM
  • Egg development is a defining process of reproduction in higher eukaryotes. In the fruit fly, Drosophila melanogaster, this process begins with four mitotic divisions starting from a single germ cell, producing a cyst of 16 cystocytes; one of these cells will become the oocyte and the others supporting nurse cells. These mitotic divisions are exceptional because cytokinesis is incomplete, resulti…
  • SUMOylated PRC1 controls histone H3.3 deposition and genome integrity of embryonic heterochromatin. [Journal Article]
    EMBO J. 2020 May 12 [Online ahead of print]Liu Z, Tardat M, … Peters AH
  • Chromatin integrity is essential for cellular homeostasis. Polycomb group proteins modulate chromatin states and transcriptionally repress developmental genes to maintain cell identity. They also repress repetitive sequences such as major satellites and constitute an alternative state of pericentromeric constitutive heterochromatin at paternal chromosomes (pat-PCH) in mouse pre-implantation embry…
  • Morphology of Mitochondria in Syncytial Annelid Female Germ-Line Cyst Visualized by Serial Block-Face SEM. [Journal Article]
    Int J Cell Biol. 2020; 2020:7483467.Urbisz AZ, Student S, … Małota K
  • Mitochondria change their morphology and distribution depending on the metabolism and functional state of a cell. Here, we analyzed the mitochondria and selected structures in female germ-line cysts in a representative of clitellate annelids - the white worm Enchytraeus albidus in which each germ cell has one cytoplasmic bridge that connects it to a common cytoplasmic mass. Using serial block-fac…
  • The effect of E93 knockdown on female reproduction in the red flour beetle, Tribolium castaneum. [Journal Article]
    Arch Insect Biochem Physiol. 2020 May 11 [Online ahead of print]Eid DM, Chareddy SCRR, Palli SR
  • The E93 transcription factor is a member of helix-turn-helix transcription factor family containing a Pip-squeak motif. This ecdysone primary response gene was identified as a regulator of cell death in Drosophila melanogaster where it is involved in ecdysone-induced autophagy and caspase activity that mediate degeneration of larval tissues during metamorphosis from larva to pupa. However, its fu…
  • Managing the Oocyte Meiotic Arrest-Lessons from Frogs and Jellyfish. [Review]
    Cells. 2020 May 07; 9(5)Jessus C, Munro C, Houliston E
  • During oocyte development, meiosis arrests in prophase of the first division for a remarkably prolonged period firstly during oocyte growth, and then when awaiting the appropriate hormonal signals for egg release. This prophase arrest is finally unlocked when locally produced maturation initiation hormones (MIHs) trigger entry into M-phase. Here, we assess the current knowledge of the successive …
  • Impaired oocyte maturation and ovulation in membrane progestin receptor (mPR) knockouts in zebrafish. [Journal Article]
    Mol Cell Endocrinol. 2020 May 05 [Online ahead of print]Wu XJ, Liu DT, … Zhu Y
  • Accumulating evidence suggest that membrane progestin receptor α (mPRα) is the membrane receptor mediating nongenomic progestin signaling that induces oocyte maturation in teleost. However, the involvement of other members of mPR family in oocyte maturation is still unclear. In this study, we found impaired oocyte maturation in zebrafish lacking mPRα1, mPRα2, mPRβ, or mPRγ2. In contrast, no diffe…
  • Mitochondrial DNA segregation and replication restrict the transmission of detrimental mutation. [Journal Article]
    J Cell Biol. 2020 Jul 06; 219(7)Chen Z, Wang ZH, … Xu H
  • Although mitochondrial DNA (mtDNA) is prone to accumulate mutations and lacks conventional DNA repair mechanisms, deleterious mutations are exceedingly rare. How the transmission of detrimental mtDNA mutations is restricted through the maternal lineage is debated. Here, we demonstrate that mitochondrial fission, together with the lack of mtDNA replication, segregate mtDNA into individual organell…
  • Fascin regulates protrusions and delamination to mediate invasive, collective cell migration in vivo. [Journal Article]
    Dev Dyn. 2020 Apr 30 [Online ahead of print]Lamb MC, Anliker KK, Tootle TL
  • CONCLUSIONS: Overall, Fascin promotes on-time border cell migration during Stage 9 and contributes to multiple aspects of this invasive, collective cell migration, including both protrusion dynamics and delamination. These findings have implications beyond Drosophila, as border cell migration has emerged as a model to study mechanisms mediating cancer metastasis. This article is protected by copyright. All rights reserved.
  • [Effect of extracellular vesicles and microRNAs in follicular fluid on follicular development]. [Journal Article]
    Sheng Wu Gong Cheng Xue Bao. 2020 Apr 25; 36(4):632-642.Wang H, Wang X, … Quan F
  • Extracellular vesicles (EVs) refer to bilayer membrane transport vesicles secreted by cells. EVs can take macromolecules from cells and transfer them to receptor cells. Among these macromolecular substances, the most studied are microRNAs (miRNAs). miRNA is non-coding RNA involved in the regulation of gene expression. It has been confirmed that there are different non-coding RNAs in mammalian fol…
  • Mouse dead end1 acts with Nanos2 and Nanos3 to regulate testicular teratoma incidence. [Journal Article]
    PLoS One. 2020; 15(4):e0232047.Imai A, Hagiwara Y, … Suzuki A
  • Spontaneous testicular teratomas (STTs) derived from primordial germ cells (PGCs) in the mouse embryonic testes predominantly develop in the 129 family inbred strain. Ter (spontaneous mutation) is a single nucleotide polymorphism that generates a premature stop codon of Dead end1 (Dnd1) and increases the incidence of STTs in the 129 genetic background. We previously found that DND1 interacts with…
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