Nuclear calcium signalling

Bootman, M. D.; Thomas, D.; Tovey, S. C.; Berridge, M. J. and Lipp, P. (2000). Nuclear calcium signalling. Cellular and Molecular Life Sciences, 57(3) pp. 371–378.

DOI: https://doi.org/10.1007/pl00000699

URL: http://link.springer.com/content/pdf/10.1007%2FPL0...

Abstract

The topic of nuclear Ca²⁺ signalling is beset by discrepant observations of substantial nuclear/cytoplasmic gradients. The reasons why some labs have recorded such gradients, whilst other workers see equilibration of Ca²⁺_cyt and Ca²⁺_nuc using the same cells and techniques, is unexplained. Furthermore, how such gradients could arise across the NE that possesses many highly-conductive NPCs is a mystery. Although nuclei may have the capacity to be autonomous signalling entities, with functional Ca²⁺ release channels and an inositide cycle, the balance of evidence suggests that Ca²⁺ release on the inner NE does not occur during physiological stimulation. Our work suggests that elementary Ca²⁺ release events originating in the cytoplasm can give rise to Ca²⁺ signals without causing elevation of the bulk cytoplasm. Clearly, the many Ca²⁺ signalling mechanisms that may impinge on Ca²⁺_nuc will remain a topic of controversy and debate for some time.

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