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Journal Article
Research Support, Non-U.S. Gov't
Review
Methods for monitoring Ca 2+ and ion channels in the lysosome.
Cell Calcium 2017 June
Lysosomes and lysosome-related organelles are emerging as intracellular Ca2+ stores and play important roles in a variety of membrane trafficking processes, including endocytosis, exocytosis, phagocytosis and autophagy. Impairment of lysosomal Ca2+ homeostasis and membrane trafficking has been implicated in many human diseases such as lysosomal storage diseases (LSDs), neurodegeneration, myopathy and cancer. Lysosomal membrane proteins, in particular ion channels, are crucial for lysosomal Ca2+ signaling. Compared with ion channels in the plasma membrane, lysosomal ion channels and their roles in lysosomal Ca2+ signaling are less understood, largely due to their intracellular localization and the lack of feasible functional assays directly applied to the native environment. Recent advances in biomedical methodology have made it possible to directly investigate ion channels in the lysosomal membrane. In this review, we provide a summary of the newly developed methods for monitoring lysosomal Ca2+ and ion channels, as well as the recent discovery of lysosomal ion channels and their significances in intracellular Ca2+ signaling. These new techniques will expand our research scope and our understanding of the nature of lysosomes and lysosome-related diseases.
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