Fluo-3 fluorescence from attached cells on each coverslip was recorded 60 sec in room air and then for 10 min after onset of perfusion chamber flushing with humidified 100% N2.
To explore whether deoxygedunin exerts any neuroprotective action against OGD, we pretreated hippocampal neurons with 0.5 µM of gedunin derivatives for 30 min, followed by 3 h OGD stimulation (the culture medium was replaced by glucose-free medium, and cells were transferred to a humidified incubation chamber flushed by a gas mixture of 95% N2 and 5% CO2 at 37°C).
For hypoxia induction, cells were incubated in a sealed hypoxic chamber flushed with a gas mixture of 94% N2, 5% CO2 and 1% O2.
For hypoxic exposure, cells were cultured in a hypoxic chamber flushed with 2% O2 and 5% CO2, with balance of 93% N2 at 37°C [ 22].
BAECs were washed with PBS and kept with serum-free DMEM in a hypoxic environment created by placing the flasks containing cells at confluence into a Billups-Rothenberg modular incubator chamber flushed with a 95%N2/5%% CO2 gas mixture.
Briefly, respiration rates were determined by measuring CO2 production from individual flies maintained in a 2.2 ml glass sealed chamber flushed with CO2-free, water-saturated (100% RH) air.
After surgery, the mice randomized to the MV group received 1.2% isoflurane/oxygen (FiO2 =0.5) for 1 hour, 3 hours or 6 hours, and the S group was placed in an anesthetizing chamber flushed with 1.2% isoflurane/oxygen (FiO2 =0.5) for 1 hour, 3 hours or 6 hours and did not undergo tracheal intubation.
These results match an earlier study of bovine endothelial cells maintained in a humidified chamber flushed with 3% O2, where GAPDH showed unstable expression levels with a significant increase after 2 4 hr and a maximum level at 18 hr of hypoxia (Graven et al. 1994).
Climbing the mountain height, rising toward a saint still honored in these parts, the paper chambers flush and fill with light that comes and goes, like hearts.
The chamber was flushed with N2 for 2 hrs.
