Abstract
Semaphorin3A (Sema3A) guides axonal growth during neuronal network development. Accumulating evidence indicates that Sema3A-induced growth cone collapse and repulsion involve endocytic membrane trafficking in the growth cone. It is now possible to visualize endocytic processes in living cells using total internal reflection fluorescence microscopy (TIRFM), a powerful tool for imaging dynamic subcellular events at the plasma membrane. In this chapter, we describe a method for TIRFM observation and analysis of clathrin-mediated endocytosis in growth cones of chicken dorsal root ganglion neurons that receive an extracellular concentration gradient of Sema3A in a culture medium.
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