599 results found
    1. Evolutionary Biology

    Sperm competition risk drives rapid ejaculate adjustments mediated by seminal fluid

    Michael J Bartlett et al.
    Seminal fluid harbours the as yet unknown mechanism that facilitates rapid adjustment of sperm velocity in response to changing sperm competition risk.
    1. Ecology

    Adaptive thermal plasticity enhances sperm and egg performance in a model insect

    Ramakrishnan Vasudeva et al.
    Sperm and egg development are temperature sensitive, enabling males and females to significantly improve their reproductive success by matching gamete function to varying thermal environments for fertilisation and offspring development.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Self-sperm induce resistance to the detrimental effects of sexual encounters with males in hermaphroditic nematodes

    Lauren N Booth et al.
    Nematode hermaphroditism has co-evolved with a self-sperm sensing mechanism that protects hermaphrodites from the detrimental effects of mating with males.
    1. Physics of Living Systems

    Rheotaxis facilitates upstream navigation of mammalian sperm cells

    Vasily Kantsler et al.
    Mammalian sperm subject to shear flow swim in upstream spirals along the walls bounding such flows, thereby demonstrating a robust mechanism for upstream navigation to the ovum.
    1. Cell Biology

    COMP-1 promotes competitive advantage of nematode sperm

    Jody M Hansen et al.
    Nematode sperm respond to competitive environments by modulating cellular pathways involved in migration and storage to ensure their access to oocytes.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    CatSperĪ¶ regulates the structural continuity of sperm Ca2+ signaling domains and is required for normal fertility

    Jean-Ju Chung et al.
    A new component, CatSper zeta, is required for continuous alignment of the calcium channel along the sperm's tail and is crucial for normal sperm swimming behavior and fertility.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Drosophila seminal sex peptide associates with rival as well as own sperm, providing SP function in polyandrous females

    Snigdha Misra, Mariana F Wolfner
    A seminal protein from a mating-male can bind sperm previously stored in his mate, providing direct benefits to the sperm from the prior male that mated with her.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    The Ca2+-activated K+ current of human sperm is mediated by Slo3

    Christoph Brenker et al.
    The principal potassium ion channel in human sperm, Slo3, is primarily activated by calcium ions and controls the membrane potential of human sperm by intracellular calcium ion levels rather than intracellular pH.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    A K+-selective CNG channel orchestrates Ca2+ signalling in zebrafish sperm

    Sylvia Fechner et al.
    Zebrafish sperm display an unusual pathway for Ca2+ signalling.
    1. Cell Biology

    Controlling fertilization and cAMP signaling in sperm by optogenetics

    Vera Jansen et al.
    Optogenetics is a non-invasive way to study cAMP signaling in sperm cells, which is able to control sperm motility and fertilization.

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