The efficient recycling of synaptic vesicles (SVs) during neuronal activity is central for sustaining brain function. During intense neuronal activity, the dominant mechanism of SV retrieval is activity-dependent bulk endocytosis (ADBE). Here, we describe a method to monitor ADBE in isolation from other SV endocytosis modes, via the uptake of large fluorescent fluid-phase markers in primary neuronal culture. Furthermore, we outline how to monitor ADBE using this approach across a field of neurons or in individual neurons.
Cousin, M. A., & Smillie, K. J. (2021). Monitoring Activity-Dependent Bulk Endocytosis in Primary Neuronal Culture Using Large Fluorescent Dextrans. In Methods in Molecular Biology (Vol. 2233, pp. 101–111). Humana Press Inc. https://doi.org/10.1007/978-1-0716-1044-2_7