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Electrophysiological Techniques on the Study of Endolysosomal Ion Channels

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Endolysosomal Voltage-Dependent Cation Channels

Part of the book series: Handbook of Experimental Pharmacology ((HEP,volume 278))

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Abstract

Endolysosomal ion channels are a group of ion channel proteins that are functionally expressed on the membrane of endolysosomal vesicles. The electrophysiological properties of these ion channels in the intracellular organelle membrane cannot be observed using conventional electrophysiological techniques. This section compiles the different electrophysiological techniques utilized in recent years to study endolysosomal ion channels and describes their methodological characteristics, emphasizing the most widely used technique for whole endolysosome recordings to date. This includes the use of different pharmacological tools and genetic tools for the application of patch-clamping techniques for specific stages of endolysosomes, allowing the recording of ion channel activity in different organelles, such as recycling endosomes, early endosomes, late endosomes, and lysosomes. These electrophysiological techniques are not only cutting-edge technologies that help to investigate the biophysical properties of known and unknown intracellular ion channels but also help us to investigate the physiopathological role of these ion channels in the distribution of dynamic vesicles and to identify new therapeutic targets for precision medicine and drug screening.

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Acknowledgments

This work was supported by funding from the National Science and Technology Council (MOST110-2320-B002-022-MY3, National Health Research Institutes (NHRI-EX112-11119SC), and National Taiwan University (112L7818) to C.-C. C.

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Authors and Affiliations

  1. Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan

    Cheng-Chang Chen

  2. Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan

    Cheng-Chang Chen

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Correspondence to Cheng-Chang Chen .

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Editors and Affiliations

  1. Institute for Cardiovascular Physiology and Pathophysiology, LMU, Planegg-Martinsried, Germany

    Christian Wahl-Schott

  2. Department Pharmazie der LMU, Pharmakologie für Naturwissenschaften, München, Germany

    Martin Biel

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Chen, CC. (2023). Electrophysiological Techniques on the Study of Endolysosomal Ion Channels. In: Wahl-Schott, C., Biel, M. (eds) Endolysosomal Voltage-Dependent Cation Channels. Handbook of Experimental Pharmacology, vol 278. Springer, Cham. https://doi.org/10.1007/164_2023_638

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