ArticleMethods in molecular biology (Clifton, N.J.)2023
Quantification of Secretory Granule Exocytosis by TIRF Imaging and Capacitance Measurements.
Article in Methods in molecular biology (Clifton, N.J.), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hormones and neurotransmitters are released from (neuro)endocrine cells by regulated exocytosis of secretory granules. During exocytosis, the granule membrane fuses with the plasma membrane, which allows release of the stored content into the bloodstream or the surrounding tissue. Here, we give a detailed description of two complementary methods to observe and quantify exocytosis in single cells: high-resolution TIRF microscopy and patch-clamp capacitance recordings. Precise stimulation of exocytosis is achieved by local pressure application or voltage-clamp depolarizations. While the chapter is focused on insulin-secreting cells as an accessible and disease-relevant model system, the methodology is applicable to a wide variety of secretory cells including chromaffin and PC12 cells.
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