Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology
-
Cell. Physiol. Biochem. · Jan 2014
Panax quinquefolium saponin attenuates cardiomyocyte apoptosis and opening of the mitochondrial permeability transition pore in a rat model of ischemia/reperfusion.
Opening of the mitochondrial permeability transition pore (mPTP) is a critical event during ischemia/reperfusion (I/R) injury. Recently, we showed that Panax quinquefolium saponin (PQS) alleviates apoptosis of cardiomyocytes by suppressing excessive endoplasmic reticulum stress (ERS) during I/R injury. Here, we hypothesized that this anti-apoptotic effect might be mediated through inhibition of mPTP and the mitochondrial apoptotic pathway. ⋯ Our results show that PQS can alleviate apoptosis of cardiomyocytes during I/R injury, possibly due to repressed mitochondrial apoptotic pathway associated with the opening of mPTP induced by myocardial I/R injury.
-
Cell. Physiol. Biochem. · Jan 2014
Ketamine inhibits proliferation of neural stem cell from neonatal rat hippocampus in vitro.
Ketamine is a widely used anesthetic in obstetric and pediatric anesthesia. In the developing brain, the widespread neuron apoptosis triggered by ketamine has been demonstrated. However, little is known about its effect on neural stem cells (NSCs) function. This study aimed to investigate the effect of ketamine on proliferation of NSCs from neonatal rat hippocampus. ⋯ Ketamine inhibited proliferation of NSCs from neonatal rat hippocampus in vitro. Suppressing Ca(2+)-PKCα-ERK1/2 signaling pathway may be involved in this inhibitory effect of ketamine on NSCs proliferation.
-
Cell. Physiol. Biochem. · Jan 2014
Role of continuous high thoracic epidural anesthesia in hippocampal apoptosis after global cerebral ischemia in rats.
Cervical sympathetic blockade has been found to reduce cerebral vascular resistance and improve focal cerebral ischemia/reperfusion injury. In this study, we tested the hypothesis that the sympathetic blockade of high thoracic epidural anesthesia (HTEA) would reduce hippocampal apoptosis after global cerebral ischemia (GCI) injury. ⋯ Our study demonstrated that continuous HTEA attenuates hippocampal apoptosis and a behavioral deficit after global cerebral ischemia, and that these protective effects are associated with the improved microcirculation, reduced oxidative stress and the less activation of PARP.