Abstract:Circular dorsal ruffles (CDRs) are rounded membrane ruffles induced by growth factors to function as precursors of the large-scale endocytosis called macropinocytosis. In cell line systems, CDR/macropinocytosis regulate the AKT-mTORC1 pathway, a canonical growth factor signaling. However, it is not known if this mechanism occurs in tissues. Here, utilizing ultra-high-resolution scanning electron microscopy, we report that CDRs are expressed in glomerular podocytes ex vivo and in vivo. Biochemical and imaging a… Show more
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