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Measuring intranuclear and nuclear envelope [Ca(2+)] vs. cytosolic [Ca (2+)].

  • Author(s): Ljubojević, Senka
  • Bers, Donald M
  • et al.

Published Web Location

http://link.springer.com/protocol/10.1007/978-1-4939-1755-6_12
No data is associated with this publication.
Abstract

Nuclear Ca(2+) regulates key cellular processes, including gene expression, apoptosis, assembly of the nuclear envelope, and nucleocytoplasmic transport. Quantification of subcellularly resolved Ca(2+) signals is, therefore, essential for understanding physiological and pathological processes in various cell types. However, the properties of commonly used Ca(2+)-fluorescent indicators in intracellular compartments may differ, thus affecting the translation of Ca(2+)-dependent fluorescence changes into quantitative changes of Ca(2+) concentration. Here, we describe technical approaches for reliable subcellular quantification of [Ca(2+)] in the cytoplasm vs. the nucleus and the nuclear envelope by in situ calibration of fluorescein-derived fluorescent indicators Fluo-4 and Fluo-5N.

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