Effect of propofol on cardiac function and gene expression after ischemic-reperfusion in isolated rat heart.
BACKGROUND
The aim of this study was to examine the cardiac function and transcriptional response of the heart to propofol after ischemia-reperfusion.


METHODS
Rat hearts were Langendorff-perfused using the modified Krebs-Henseleit buffer, and took 20 min stabilizing periods, 40 min ischemia periods, and then 120 min reperfusion period. The hearts were divided into 5 groups;


METHODS
180 min perfusion after stabilization, Ischemic: 40 min global ischemia after stabilization, followed by 120 min reperfusion, Pre: 2 microM propofol treatment was preformed only before ischemia, Post: 2 microM propofol treatment was performed only during reperfusion after ischemia, Pre/Post: 2 microM propofol treatment was performed both before and after ischemia. The measurement for cardiac performances, such as left ventricular developed pressure (LVDP), rate of left ventricular pressure generation (dP/dt), heart rate, and coronary flow were obtained. The expression profiles of isolated mRNA were determined by using Agilent microarray and real time-polymerase chain reaction (RT-PCR) was used to confirm the microarray results for a subset of genes.


RESULTS
The Post group showed better LVDP and dP/dt than the Ischemic group. But there were no significant differences in heart rate and coronary flow among the groups. On the results of RT-PCR, the expressions of Abcc9, Bard1, and Casp4 were increased, but the expressions of Lyz, Casp8, and Timp1 were decreased in the Post group compared with the Ischemic group.


CONCLUSIONS
This study suggests that 2 microM propofol may provide cardioprotective effect, and modulate gene expression such as apoptosis, and K(ATP) ion channel related-genes during reperfusion in the isolated rat hearts.
Kim
Youn Jin
YJ
Department of Anesthesiology and Pain Medicine, School of Medicine, Ewha Womans University, Seoul, Korea.
Lim
Hae Ja
HJ
Choi
Sung Uk
SU