1,958 results found
    1. Neuroscience

    Noninvasive quantification of axon radii using diffusion MRI

    Jelle Veraart et al.
    Cell-specific architectural properties such as the axon diameter of the white matter of the human brain can be quantified accurately and non-invasively using diffusion magnetic resonance imaging.
    1. Neuroscience

    Test of the 'glymphatic' hypothesis demonstrates diffusive and aquaporin-4-independent solute transport in rodent brain parenchyma

    Alex J Smith et al.
    Solute movement in brain extracellular space is determined by solute diffusion, and does not depend on convection or aquaporin-4 expression as predicted by the glymphatic mechanism.
    1. Cell Biology

    A sphingolipid-dependent diffusion barrier confines ER stress to the yeast mother cell

    Lori Clay et al.
    Sphingolipids govern the compartmentalization of yeast cells through the assembly of lateral diffusion barriers in ER membranes.
    1. Developmental Biology
    2. Physics of Living Systems

    Nuclear crowding and nonlinear diffusion during interkinetic nuclear migration in the zebrafish retina

    Afnan Azizi et al.
    The evolving spatial distribution of nuclei between apical and basal surfaces of the developing retinal neuroepithelium is quantitatively described by a nonlinear diffusion equation accounting for crowding within the tissue.
    1. Computational and Systems Biology
    2. Developmental Biology

    High-throughput mathematical analysis identifies Turing networks for patterning with equally diffusing signals

    Luciano Marcon et al.
    Realistic reaction-diffusion signaling networks that include cell-autonomous factors can robustly form self-organizing spatial patterns for any combination of diffusion coefficients without requiring differential diffusivity.
    1. Neuroscience

    Effects of fluorescent glutamate indicators on neurotransmitter diffusion and uptake

    Moritz Armbruster et al.
    Fluorescent glutamate indicators distort the time course of neurotransmitter diffusion and uptake by competing with transporters, an important caveat to consider when using iGluSnFR and its analogs.
    1. Developmental Biology

    Wnt3 distribution in the zebrafish brain is determined by expression, diffusion and multiple molecular interactions

    Sapthaswaran Veerapathiran et al.
    Wnt3 accomplishes long-range distribution by extracellular diffusion controlled by expression, tissue morphology, interactions with heparan sulfate proteoglycans, and co-receptor-mediated receptor binding to regulate brain development in zebrafish embryos.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    A glucose-starvation response regulates the diffusion of macromolecules

    Ryan P Joyner et al.
    During stress conditions, eukaryotic cells dramatically alter their biophysical properties to regulate diffusion of macromolecules.
    1. Cell Biology

    Single molecule imaging reveals a major role for diffusion in the exploration of ciliary space by signaling receptors

    Fan Ye et al.
    Membrane receptor proteins move through primary cilia largely by passive diffusion rather than by active intraflagellar transport.
    1. Neuroscience

    Diffusion-MRI-based regional cortical microstructure at birth for predicting neurodevelopmental outcomes of 2-year-olds

    Minhui Ouyang et al.
    Diffusion-MRI-based cerebral cortical microstructure encoding regionally differential dendritic arborization and synaptic formation at birth robustly predicts future 2-year-old cognitive and language outcomes with regionally heterogeneous contribution that exhibits functional selectivity.

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