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    1. Developmental Biology

    Prolonged ovarian storage of mature Drosophila oocytes dramatically increases meiotic spindle instability

    Ethan J Greenblatt, Rebecca Obniski ... Allan C Spradling
    Meiotic chromosome segregation in mature Drosophila oocytes is sensitive to prolonged quiescence, suggesting that human oocyte instability may result from storage of mature rather than primordial oocytes and be modifiable.
    1. Cell Biology
    2. Developmental Biology

    Zn2+ is essential for Ca2+ oscillations in mouse eggs

    Hiroki Akizawa, Emily M Lopes, Rafael A Fissore
    Throughout oocyte maturation, there is a simultaneous elevation in the concentrations of Ca2+ and Zn2+, and the fertilization-induced Ca2+ oscillations cease under Zn2+-deficient conditions, implying an interplay between these ions, potentially at the IP3R1 level that harbors a Zn2+-binding domain.
    1. Cell Biology
    2. Developmental Biology

    The ribosomal RNA m5C methyltransferase NSUN-1 modulates healthspan and oogenesis in Caenorhabditis elegans

    Clemens Heissenberger, Jarod A Rollins ... Markus Schosserer
    In nematode worms, NSUN-1 methylates ribosomal RNA and influences phenotypes related to aging, stress resistance, germ line development, and cuticle integrity by regulating translation of specific mRNAs.
    1. Developmental Biology

    Reproduction: Shedding light on spawning in jellyfish

    Laurinda A Jaffe
    An opsin receptor has a central role in the production and release of eggs by female jellyfish.
    Version of Record
    Insight
    1. Developmental Biology
    2. Chromosomes and Gene Expression

    Maternal LSD1/KDM1A is an essential regulator of chromatin and transcription landscapes during zygotic genome activation

    Katia Ancelin, Laurène Syx ... Edith Heard
    The maternally provided histone demethylase LSD1/KDM1A has an instrumental role at the beginning of life, shaping the histone methylation landscape and the transcriptional repertoire of the early mouse embryo.
    1. Cell Biology

    Selective dephosphorylation by PP2A-B55 directs the meiosis I-meiosis II transition in oocytes

    S Zachary Swartz, Hieu T Nguyen ... Arminja N Kettenbach
    Time-course phosphoproteomics reveals that selective dephosphorylation is critical for directing the MI/MII transition and that, through its inherent phospho-threonine preference, PP2A-B55 imposes specific phosphoregulated behaviors that distinguish the two meiotic divisions.
    1. Developmental Biology

    SMAD4 promotes somatic-germline contact during murine oocyte growth

    Sofia Granados-Aparici, Qin Yang, Hugh J Clarke
    Depletion of the TGFβ signal-transducer, SMAD4, in granulosa cells of growing follicles reduces the number of filopodia, termed transzonal projections, that stably attach to and mediate communication with the oocyte.
    1. Developmental Biology

    Maternally provided LSD1/KDM1A enables the maternal-to-zygotic transition and prevents defects that manifest postnatally

    Jadiel A Wasson, Ashley K Simon ... David J Katz
    Epigenetic reprogramming by LSD1/KDM1A acts at fertilization in mice to enable embryogenesis and prevent behavioural abnormalities.
    1. Neuroscience

    Mechanical force of uterine occupation enables large vesicle extrusion from proteostressed maternal neurons

    Guoqiang Wang, Ryan J Guasp ... Monica Driscoll
    Large extracellular vesicle extrusion that eliminates neuronal protein aggregates and organelles is potentiated by uterine filling, linking reproductive status to maternal nervous system health, and demonstrating mechanobiology components in exophergenesis.
    1. Cell Biology
    2. Developmental Biology

    Control of PNG kinase, a key regulator of mRNA translation, is coupled to meiosis completion at egg activation

    Masatoshi Hara, Boryana Petrova, Terry L Orr-Weaver
    The kinase that controls maternal mRNA translation is regulated by phosphorylation of its activating subunit to restrict kinase activity to the developmental window between meiosis completion and early embryogenesis.