Neuroprotective efficacy and therapeutic window of curcuma oil: in rat embolic stroke model
نویسندگان
چکیده
BACKGROUND Among the naturally occurring compounds, turmeric from the dried rhizome of the plant Curcuma longa has long been used extensively as a condiment and a household remedy all over Southeast Asia. Turmeric contains essential oil, yellow pigments (curcuminoids), starch and oleoresin. The present study was designed for investigating the neuroprotective efficacy and the time window for effective therapeutic use of Curcuma oil (C. oil). METHOD In the present study, the effect of post ischemic treatment of C.oil after ischemia induced by occlusion of the middle cerebral artery in the rat was observed. C.oil (500 mg/kg body wt) was given 4 hrs post ischemia. The significant effect on lesion size as visualized by using diffusion-weighted magnetic resonance imaging and neuroscore was still evident when treatment was started 4 hours after insult. Animals were assessed for behavioral deficit scores after 5 and 24 hours of ischemia. Subsequently, the rats were sacrificed for evaluation of infarct and edema volumes and other parameters. RESULTS C.oil ameliorated the ischemia induced neurological functional deficits and the infarct and edema volumes measured after 5 and 24 hrs of ischemia. After 24 hrs, immunohistochemical and Western blot analysis demonstrated that the expression of iNOS, cytochrome c and Bax/Bcl-2 were altered after the insult, and antagonized by treatment with C.oil. C.oil significantly reduced nitrosative stress, tended to correct the decreased mitochondrial membrane potential, and also affected caspase-3 activation finally apoptosis. CONCLUSION Here we demonstrated that iNOS-derived NO produced during ischemic injury was crucial for the up-regulation of ischemic injury targets. C.oil down-regulates these targets this coincided with an increased survival rate of neurons.
منابع مشابه
Protective Effect of Delayed Ischemic Postconditioning on Embolic Stroke Complications in Female Rat
Background & Aims: Ischemic postconditioning, conducted by a series of brief occlusion and release of the bilateral common carotid arteries, has neuroprotective properties in permanent or transient models of middle cerebral artery (MCA) occlusion but its delayed neuroprotective effects in the embolic model of stroke, especially in female rat, have not yet been reported and were investigated ...
متن کاملNeuroprotective Consequences of Postconditioning on Embolic Model of Cerebral Ischemia in Rat
متن کامل
Vitamin E Derivative Alpha-Tocotrienol Failed to Show Neuroprotective Effects after Embolic Stroke in Rats
Objective(s) Previous studies have demonstrated that pretreatment with alpha-tocotrienol (a-TCT) can reduce ischemic damage in mice following middle cerebral artery (MCA) occlusion. It is also reported to decrease stroke- dependent brain tissue damage in 12-Lox-deficient mice and spontaneously hypertensive rats. In the present study, the neuroprotective effects of a-TCT and rosiglitazone (RGZ)...
متن کاملNeuroprotective effect of p-coumaric acid in rat model of embolic cerebral ischemia
Objective(s): Stroke poses a crucial risk for mortality and morbidity. Our study aimed to investigate the effect of p-coumaric acid on focal cerebral ischemia in rats. Material and Methods: Rats were randomly divided into four groups, namely Group I (control rats), Group II (ischemia rats), Group III (6 hr ischemia + p-coumaric acid rats) and Group IV (24 hr ischemia + p-coumaric acid rats). C...
متن کاملThe effect of pre-treatment with olive oil on TNFR1/NF-кB inflammatory pathway in rat ischemic stroke model
Introduction: Ischemic stroke is a serious neurological disease and a leading cause of death and severe disability in the world. A key component of the Mediterranean diet is olive oil, which contains compounds with antioxidant and anti-inflammatory effects. In this regard, the aim of the present study was to investigate the effect of olive oil on the ischemic damages and the inflammatory pathwa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- BMC Complementary and Alternative Medicine
دوره 8 شماره
صفحات -
تاریخ انتشار 2008