Effectiveness of 6-shogaol in potentiating sevoflurane mediated
neuroprotection against ischemia/reperfusion-induced brain injury via
regulating apoptotic proteins and PI3K/Akt/mTOR/s6K signalling and
HIF-1α/HO-1 expression
Abstract
Purpose: The current research has been intended to evaluate the impacts
of 6-shogaol in rodent model of ischemic-reperfusion induced- brain
injury and also assessed whether 6-shogaol enhanced sevoflurane’s
neuroprotective effects. Methods: Ischemic-Reperfusion (I/R) injury was
induced by middle cerebral artery occlusion (MCAO) method in
Sprague-Dawley rats. A separate group of animals was exposed to
sevoflurane (2.5%) post-conditioning for 1 h immediately after
reperfusion. 6-shogaol (25 mg or 50 mg/kg body weight) was orally
administered to treatment group rats for 14 days and then subjected to
I/R. Results: 6-shogaol treatment along with/without sevoflurane
post-conditioning reduced the number of apoptotic cell counts, brain
edema and cerebral infarct volume. The western blotting analysis
revealed a significant stimulation of the PI3K/Akt/mTOR signal pathway.
RT-PCR and western blotting studies revealed improved expressions of
HIF-1α and HO-1were also noticed at both gene level and protein levels
as determined by. I/R induced neurological deficits were also alleviated
on sevoflurane post-conditioning with/without 6-shogaol treatment.
Conclusion: The study’s findings reveal that pre-treatment with
6-shogoal enhanced the neuroprotective properties of sevoflurane
post-conditioning, illustrating the efficacy of the compound against I/R
injury. 6-Shogaol thus could be investigated further for cerebral
protection following I/R.