593 results found
    1. Neuroscience

    Apolipoprotein M-bound sphingosine-1-phosphate regulates blood–brain barrier paracellular permeability and transcytosis

    Mette Mathiesen Janiurek et al.
    Shortage of blood-borne apolipoprotein-M–bound sphingosine-1-phosphate, which accompanies various brain disorders, causes paracellular leak and increase in transcytosis at the blood–brain barrier, which can be reversed, thus is of clinical relevance.
    1. Cell Biology

    The mitochondrial permeability transition pore activates the mitochondrial unfolded protein response and promotes aging

    Suzanne Angeli et al.
    Loss of the F-ATP synthase c-subunit inhibits a pathological mitochondrial permeability transition pore that is coupled to a maladaptive mitochondrial unfolded protein response while also extending lifespan.
    1. Cell Biology

    Bax and Bak function as the outer membrane component of the mitochondrial permeability pore in regulating necrotic cell death in mice

    Jason Karch et al.
    The proteins Bax and Bak, which increase the permeability of the mitochondrial membrane during apoptosis, are also crucial for generating a mitochondrial membrane pore that is specifically involved in necrosis.
    1. Cell Biology
    2. Plant Biology

    From plasmodesma geometry to effective symplasmic permeability through biophysical modelling

    Eva E Deinum et al.
    A new biophysical model enables the reconciliation of ultrastructural and tissue level measurements on parameters affecting intercellular communication, and provides novel functional insight into experimental findings.
    1. Cell Biology

    Magnetic resonance measurements of cellular and sub-cellular membrane structures in live and fixed neural tissue

    Nathan H Williamson et al.
    Low-field single-sided magnetic resonance diffusion methods detect and measure permeability of sub-micron compartments which likely include cell processes, organelles, and cellular vesicles within ex vivo mouse spinal cords.
    1. Cell Biology

    Vascular permeability in retinopathy is regulated by VEGFR2 Y949 signaling to VE-cadherin

    Ross O Smith et al.
    Pathological vessel leakage in mouse retinopathy models depends on VE-cadherin Y685 phosphorylation status, which in turn is regulated by a signaling cascade originating with VEGFR2 Y949 phosphorylation.
    1. Structural Biology and Molecular Biophysics

    Atomistic simulations indicate the c-subunit ring of the F1Fo ATP synthase is not the mitochondrial permeability transition pore

    Wenchang Zhou et al.
    The notion that the lumen of the ATP synthase membrane rotor is the long-sought megachannel that triggers the onset of the mitochondrial permeability transition is found to be inconsistent with its actual structural and functional properties.
    1. Stem Cells and Regenerative Medicine
    2. Immunology and Inflammation

    Modulation of occluding junctions alters the hematopoietic niche to trigger immune activation

    Rohan J Khadilkar et al.
    Occluding-junctions form a permeability barrier around the hematopoietic niche in Drosophila that controls the production of immune cells in response to infection by shaping the signalling micro-environment produced by the niche.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Acyl chain asymmetry and polyunsaturation of brain phospholipids facilitate membrane vesiculation without leakage

    Marco M Manni et al.
    The asymmetric combination of saturated and polyunsaturated acyl chains in phospholipids as typically observed in synapses makes membranes prone to deformation and fission without compromising their impermeability.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Importin-β modulates the permeability of the nuclear pore complex in a Ran-dependent manner

    Alan R Lowe et al.
    The Ran GTPase plays a role in defining the physical properties of the nuclear pore complex transport channel by remodeling the binding interactions of importin-β with the nucleoporin Nup153 at the nuclear face of the pore.

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