Da. Cox et Ma. Matlib, MODULATION OF INTRAMITOCHONDRIAL FREE CA2-CA2+ EXCHANGE( CONCENTRATION BY ANTAGONISTS OF NA+), Trends in pharmacological sciences, 14(11), 1993, pp. 408-413
Evidence has accumulated in the past decade suggesting that Ca2+ acts
as a second messenger not only in the cytosol of the heart to regulate
contractility, but also within the mitochondria to regulate the rate
of oxidative ATP synthesis. Just as elucidation of the second messenge
r pathways for Ca2+ in the cytosol has led to the development of pharm
acological interventions that alter mechanical functioning of the hear
t, understanding the role of Ca2+ as a second messenger within the mit
ochondria and the mechanisms by which this organelle transports and re
gulates Ca2+ has exciting potential for developing pharmacological int
erventions that alter myocardial energy metabolism. In this article, D
avid Cox and Mohammed Matlib discuss the potential consequences of pha
rmacologically increasing the intramitochondrial Ca2+ concentration on
myocardial energy metabolism, and suggest some pathological condition
s in which such an effect may be beneficial.