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Tyrosine kinase-mediated axial motility of basal cells revealed by intravital imaging.


ABSTRACT: Epithelial cells are generally considered to be static relative to their neighbours. Basal cells in pseudostratified epithelia display a single long cytoplasmic process that can cross the tight junction barrier to reach the lumen. Using in vivo microscopy to visualize the epididymis, a model system for the study of pseudostratified epithelia, we report here the surprising discovery that these basal cell projections--which we call axiopodia--periodically extend and retract over time. We found that axiopodia extensions and retractions follow an oscillatory pattern. This movement, which we refer to as periodic axial motility (PAM), is controlled by c-Src and MEK1/2-ERK1/2. Therapeutic inhibition of tyrosine kinase activity induces a retraction of these projections. Such unexpected cell motility may reflect a novel mechanism by which specialized epithelial cells sample the luminal environment.

SUBMITTER: Roy J 

PROVIDER: S-EPMC4754344 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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Tyrosine kinase-mediated axial motility of basal cells revealed by intravital imaging.

Roy Jeremy J   Kim Bongki B   Hill Eric E   Visconti Pablo P   Krapf Dario D   Vinegoni Claudio C   Weissleder Ralph R   Brown Dennis D   Breton Sylvie S  

Nature communications 20160212


Epithelial cells are generally considered to be static relative to their neighbours. Basal cells in pseudostratified epithelia display a single long cytoplasmic process that can cross the tight junction barrier to reach the lumen. Using in vivo microscopy to visualize the epididymis, a model system for the study of pseudostratified epithelia, we report here the surprising discovery that these basal cell projections--which we call axiopodia--periodically extend and retract over time. We found tha  ...[more]

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