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- W4362470249 startingPage "e0283736" @default.
- W4362470249 abstract "In studies exploring the potential for nanosecond duration electric pulses to serve as a novel modality for neuromodulation, we found that a 5 ns pulse triggers an immediate rise in [Ca2+]i in isolated bovine adrenal chromaffin cells. To facilitate ongoing efforts to understand underlying mechanisms and to work toward carrying out investigations in cells in situ, we describe the suitability and advantages of using isolated murine adrenal chromaffin cells expressing, in a Cre-dependent manner, the genetically-encoded Ca2+indicator GCaMP6f. Initial experiments confirmed that Ca2+ responses evoked by a 5 ns pulse were similar between fluorescent Ca2+ indicator-loaded murine and bovine chromaffin cells, thereby establishing that 5 ns-elicited excitation of chromaffin cells occurs reproducibly across species. In GCaMP6f-expressing murine chromaffin cells, spontaneous Ca2+ activity as well as nicotinic receptor agonist- and 5 ns evoked-Ca2+ responses consistently displayed similar kinetic characteristics as those in dye-loaded cells but with two-twentyfold greater amplitudes and without photobleaching. The high signal-to-noise ratio of evoked Ca2+ responses as well as spontaneous Ca2+ activity was observed in cells derived from Sox10-Cre, conditional GCaMP6f mice or TH-Cre, conditional GCaMP6f mice, although the number of cells expressing GCaMP6f at sufficiently high levels for achieving high signal-to-noise ratios was greater in Sox10-Cre mice. As in bovine cells, Ca2+ responses elicited in murine GCaMP6f-expressing cells by a 5 ns pulse were mediated by the activation of voltage-gated Ca2+ channels but not tetrodotoxin-sensitive voltage-gated Na+ channels. We conclude that genetically targeting GCaMP6f expression to murine chromaffin cells represents a sensitive and valuable approach to investigate spontaneous, receptor agonist- and nanosecond electric pulse-induced Ca2+ responses in vitro. This approach will also facilitate future studies investigating the effects of ultrashort electric pulses on cells in ex vivo slices of adrenal gland, which will lay the foundation for using nanosecond electric pulses to stimulate neurosecretion in vivo." @default.
- W4362470249 created "2023-04-05" @default.
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- W4362470249 date "2023-03-31" @default.
- W4362470249 modified "2023-09-26" @default.
- W4362470249 title "High signal-to-noise imaging of spontaneous and 5 ns electric pulse-evoked Ca2+ signals in GCaMP6f-expressing adrenal chromaffin cells isolated from transgenic mice" @default.
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- W4362470249 doi "https://doi.org/10.1371/journal.pone.0283736" @default.
- W4362470249 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37000822" @default.
- W4362470249 hasPublicationYear "2023" @default.
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