1,825 results found
    1. Cell Biology
    2. Computational and Systems Biology

    A positive-feedback-based mechanism for constriction rate acceleration during cytokinesis in Caenorhabditis elegans

    Renat N Khaliullin et al.
    Positive feedback between contractile ring myosin and compression-driven cortical flow can explain the exponential accumulation of contractile ring components and constriction rate acceleration that ensures timely cell separation during cytokinesis.
    1. Neuroscience

    A positive feedback loop linking enhanced mGluR function and basal calcium in spinocerebellar ataxia type 2

    Pratap Meera et al.
    A damaging form of positive feedback linking elevated calcium levels and metabotropic glutamate receptor function in Purkinje neurons plays a critical role in the pathology in spinocerebellar ataxias.
    1. Cell Biology

    Evidence that a positive feedback loop drives centrosome maturation in fly embryos

    Ines Alvarez-Rodrigo et al.
    Polo kinase recruitment by the protein Spd-2 to the pericentriolar scaffold is a key element of the positive feedback loop which drives the expansion of the mitotic centrosomes in flies.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Kinesin Kip2 enhances microtubule growth in vitro through length-dependent feedback on polymerization and catastrophe

    Anneke Hibbel et al.
    The budding yeast kinesin Kip2 is a polymerase that uses its processive motility in a positive feedback loop to promote microtubule growth.
    1. Developmental Biology

    Functional evolution of a morphogenetic gradient

    Chun Wai Kwan et al.
    BMP guides the evolution of extraembryonic tissue complexity in fly embryos through changes in the control of a positive feedback circuit.
    1. Cancer Biology
    2. Cell Biology

    A positive feedback loop between Myc and aerobic glycolysis sustains tumor growth in a Drosophila tumor model

    Kenneth Kin Lam Wong et al.
    Specific molecular links that orchestrate growth signals and metabolic reprogramming to achieve tumorigenesis are identified as potential metabolic vulnerabilities in cancer treatment.
    1. Neuroscience

    Reciprocal synapses between mushroom body and dopamine neurons form a positive feedback loop required for learning

    Isaac Cervantes-Sandoval et al.
    Structural and functional analysis of axonal-axonal reciprocal connections between dopamine neurons and Kenyon cells provides insight into the brain computations for normal associative olfactory learning.
    1. Computational and Systems Biology
    2. Immunology and Inflammation

    Stimulus-selective crosstalk via the NF-κB signaling system reinforces innate immune response to alleviate gut infection

    Balaji Banoth et al.
    The integration of signals via the pleiotropic NF-kappaB (NF-κB) system enables microenvironmental cues to tune cellular responses to pathogenic substances.
    1. Cell Biology

    Cell cycle entry triggers a switch between two modes of Cdc42 activation during yeast polarization

    Kristen Witte et al.
    Optogenetic control of Cdc42 activation during polarization of budding yeast demonstrates a cell cycle regulated switch between two distinct modes of positive feedback.

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