Thapsigargin-induced Nuclear Calcium Signals in Rat Basophilic Leukaemia Cells
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By a confocal fluorescence microscope with an argon-ion laser (488 nm) and a He-Cd laser (325 nm) we have studied thapsigargin-induced calcium signals in individual rat basophilic leukaemia (RBL-2H3) cells. In the presence or absence of external calcium ions, thapsigargin-induced calcium signals were transferred to the nucleus as well as to the cytoplasm of RBL-2H3 cells. The calcium signals were generally much stronger in the nucleus than in the cytoplasm. However, some of the RBL-2H3 cells had apparently reduced nuclear calcium signals. They had a basophil-like bilobed (multilobed) nucleus, although most RBL-2H3 cells had a mast-cell-like monolobed nucleus. In the cells with a bilobed nucleus, IgE-receptor-mediated calcium signals were neither transferred to the nucleus nor to the cytoplasm. The results gave a new insight into the understanding of the mechanism of the nuclear calcium signals in RBL-2H3 cells.
Tan T, Lu B, Zhang J, Niu Y, Si W, Wei Q Stem Cells Dev. 2013; 23(8):813-22.
PMID: 24251382 PMC: 3992001. DOI: 10.1089/scd.2013.0280.
Asmat T, Agarwal V, Rath S, Hildebrandt J, Hammerschmidt S J Biol Chem. 2011; 286(20):17861-9.
PMID: 21454571 PMC: 3093861. DOI: 10.1074/jbc.M110.212225.
Jornot L, Petersen H, Junod A Biochem J. 1998; 335 ( Pt 1):85-94.
PMID: 9742216 PMC: 1219755. DOI: 10.1042/bj3350085.
Akasaka R, Teshima R, IKEBUCHI H, Sawada J Inflamm Res. 1996; 45(12):583-9.
PMID: 8988402 DOI: 10.1007/BF02312039.