scholarly journals Gene Therapy of the Heart through Targeting Non-Cardiac Cells

10.5772/17424 ◽  
2011 ◽  
Author(s):  
Guro Valen
Keyword(s):  

Author(s):  
W.G. Wier

A fundamentally new understanding of cardiac excitation-contraction (E-C) coupling is being developed from recent experimental work using confocal microscopy of single isolated heart cells. In particular, the transient change in intracellular free calcium ion concentration ([Ca2+]i transient) that activates muscle contraction is now viewed as resulting from the spatial and temporal summation of small (∼ 8 μm3), subcellular, stereotyped ‘local [Ca2+]i-transients' or, as they have been called, ‘calcium sparks'. This new understanding may be called ‘local control of E-C coupling'. The relevance to normal heart cell function of ‘local control, theory and the recent confocal data on spontaneous Ca2+ ‘sparks', and on electrically evoked local [Ca2+]i-transients has been unknown however, because the previous studies were all conducted on slack, internally perfused, single, enzymatically dissociated cardiac cells, at room temperature, usually with Cs+ replacing K+, and often in the presence of Ca2-channel blockers. The present work was undertaken to establish whether or not the concepts derived from these studies are in fact relevant to normal cardiac tissue under physiological conditions, by attempting to record local [Ca2+]i-transients, sparks (and Ca2+ waves) in intact, multi-cellular cardiac tissue.





2001 ◽  
Vol 120 (5) ◽  
pp. A10-A10
Author(s):  
M YAMAMOTO ◽  
R ALEMANY ◽  
Y ADACHI ◽  
W GRIZZLE ◽  
D CURIEL


2001 ◽  
Vol 120 (5) ◽  
pp. A349-A349
Author(s):  
J TSENG ◽  
F FARNEBO ◽  
O KISKER ◽  
C BECKER ◽  
C KUO ◽  
...  


2005 ◽  
Vol 173 (4S) ◽  
pp. 300-300
Author(s):  
Sreedhar Sagi ◽  
Lutz Trojan ◽  
Peter Aiken ◽  
Maurice S. Michel ◽  
Thomas Knoll


2005 ◽  
Vol 173 (4S) ◽  
pp. 214-214
Author(s):  
Shuji Terao ◽  
Toshiro Shirakawa ◽  
Kazumasa Goda ◽  
Sadao Kamidono ◽  
Akinobu Gotoh


2006 ◽  
Vol 175 (4S) ◽  
pp. 200-201
Author(s):  
Minoru Horinaga ◽  
Kelley Harsch ◽  
Ryuichi Fukuyama ◽  
Warren Heston ◽  
William Larchian


2004 ◽  
Vol 171 (4S) ◽  
pp. 373-373
Author(s):  
Trinity J. Bivalacqua ◽  
Mustafa F. Usta ◽  
Hunter C. Champion ◽  
Weiwen Deng ◽  
Philip J. Kadowitz ◽  
...  


2004 ◽  
Vol 171 (4S) ◽  
pp. 257-258
Author(s):  
Joel Slaton ◽  
Daniel Sloper ◽  
Miriam Taylor ◽  
Alan Davis ◽  
Khalil Ahmed




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