BRADYKININ INDUCES RISE OF FREE CALCIUM IN NUCLEI OF NEUROBLASTOMA X GLIOMA HYBRID NG-108-15 CELLS

被引:2
作者
BECKMANN, R
LINDSCHAU, C
HALLER, H
BUCHNER, K
机构
[1] FREE UNIV BERLIN,KLINIKUM STEGLITZ,INST BIOCHEM,W-1000 BERLIN,GERMANY
[2] FREE UNIV BERLIN,KLINIKUM STEGLITZ,DEPT INTERNAL MED & NEPHROL,W-1000 BERLIN,GERMANY
关键词
SIGNAL TRANSDUCTION; CALCIUM; BRADYKININ; CELL NUCLEUS; NEUROBLASTOMA CELLS;
D O I
10.1002/jnr.490400502
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Confocal fluorescence microscopy was used to study the bradykinin-induced calcium signals in the neuroblastoma x glioma cell line NG 108-15. We found that bradykinin induced a rise in free calcium, not only in the cytoplasm but also in the nucleus, The nuclear and cytosolic calcium concentrations were not significantly different and rose to about 1.2 mu M. The signal was mediated by the B-2-receptor subtype as confirmed using the specific antagonist Hoe 140. Both the onset and the intensity of the calcium signals were concentration-dependent. The rise of nuclear calcium level was independent of extracellular calcium and suppressed by thapsigargin which is known to deplete inositol 1,4,5-trisphosphate-sensitive calcium stores, Bradykinin-induced calcium increase desensitizes rapidly, This desensitization was shown not to involve activation of protein kinase C. (c) 1995 Wiley-Liss, Inc.
引用
收藏
页码:571 / 578
页数:8
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