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.



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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