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Capacitative Ca2+ Entry Is Closely Linked to the Filling State of Internal Ca2+ Stores: A Study Using Simultaneous Measurements of ICRAC and Intraluminal [Ca2+]
Open accessAbstract
ICRAC (the best characterized Ca2+ current activated by store depletion) was monitored concurrently for the first time with [Ca2+] changes in internal stores. To establish the quantitative and kinetic relationship between these two parameters, we have developed a novel means to clamp [Ca2+] within stores of intact cells at any level. The advantage of this approach, which is based on the membrane-permeant low-affinity Ca2+ chelator N,N,N′,N′-tetrakis (2-pyridylmethyl)ethylene diamine (TPEN), is that [Ca2+] within the ER can be lowered and restored to its original level within 10–15 s without modifications of Ca2+ pumps or release channels. Using these new tools, we demonstrate here that Ca2+ release–activated Ca2+ current (ICRAC) is activated (a) solely by reduction of free [Ca2+] within the ER and (b) by any measurable decrease in [Ca2+]ER. We also demonstrate that the intrinsic kinetics of inactivation are relatively slow and possibly dependent on soluble factors that are lost during the whole-cell recording.
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Hamill, O. P., Marty, A., Neher, E., Sakmann, B., & Sigworth, F. J. (1981) · Pflügers Archiv - European Journal of Physiology · doi:10.1007/bf00656997 · Cited by 18,436
Capacitative calcium entry revisited
Putney, J. W. (1990) · Cell Calcium · doi:10.1016/0143-4160(90)90016-n · Cited by 1,487
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Store-Operated Calcium Channels
Prakriya, M., & Lewis, R. S. (2015) · Physiological Reviews · doi:10.1152/physrev.00020.2014 · Cited by 1,239
Calcium and apoptosis: ER-mitochondria Ca2+ transfer in the control of apoptosis
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Calcium signaling mechanisms in T lymphocytes.
Lewis, R. S. (2001) · Annual Review of Immunology · doi:10.1146/annurev.immunol.19.1.497 · Cited by 860
Zinc in the physiology and pathology of the CNS
Sensi, S. L., Paoletti, P., Bush, A. I., & Sekler, I. (2009) · Nature Reviews Neuroscience · doi:10.1038/nrn2734 · Cited by 759
Metadata
- Authors
- Hofer, A. M., Fasolato, C., & Pozzan, T.
- Venue
- The Journal of Cell Biology
- Publisher
- Rockefeller University Press
- Published
- 1998-01-26
- Volume
- 140
- Issue
- 2
- Pages
- 325-334
- ISSN
- 0021-9525 (ISSN-L)
- 1540-8140
- OpenAlex
- W1986801182
- Cited by
- 214
- References
- 2
- FWCI
- 11.77
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Capacitative Ca2+ Entry Is Closely Linked to the Filling State of Internal Ca2+ Stores: A Study Using Simultaneous Measurements of ICRAC and Intraluminal [Ca2+]. https://app.cochat.ai/papers/10.1083/jcb.140.2.325
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- Hofer, A. M., Fasolato, C., & Pozzan, T. (1998). Capacitative Ca2+ Entry Is Closely Linked to the Filling State of Internal Ca2+ Stores: A Study Using Simultaneous Measurements of ICRAC and Intraluminal [Ca2+]. The Journal of Cell Biology. https://doi.org/10.1083/jcb.140.2.325
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