Protective effect of crocin against cerebral ischemia in a dose-dependent manner in a rat model of ischemic stroke.

Abstract

BACKGROUND:

Crocin is a water-soluble carotenoid isolated from the Crocus sativus L (saffron) stigma. It has previously been reported that it has protective effects against renal, cardiac, and global cerebral ischemic injury. However its therapeutic effects remain to be clarified regarding ischemic reperfusion injuries, brain edema, and activity of antioxidant enzymes in a transient model of focal cerebral ischemia.

METHODS:

Transient focal cerebral ischemia was induced by 60-minute middle cerebral artery occlusion (MCAO), followed by 23-hour reperfusion. Crocin at doses of 15, 30, 60, and 120 mg/kg intraperitoneally were injected at the start of ischemia. Infarct volume and neurologic outcome were evaluated 24 hours after MCAO. For the therapeutic time window measurement, crocin (60 mg/kg) was given 1, 3, and 6 hours after ischemia; 24 hours later brain edema and antioxidant enzyme activity were assessed.

RESULTS:

The results indicated that treatment with crocin at doses of 30, 60, and 120 mg/kg significantly decreased infarct volume by 64%, 74%, and 73%, respectively. Administration of crocin (60 mg/kg) 1 hour before, at the start, or 1 hour after ischemia reduced brain edema by 48%, 52%, and 51%, respectively. Moreover, crocin (60 mg/kg) significantly reduced malondialdehyde (MDA) content and increased activity of superoxide dismutase (SOD) and glutathione peroxidase (GPx) in the ischemic cortex (P< .001).

CONCLUSIONS:

Our findings indicate that crocin has protective effects against ischemic reperfusion injury and cerebral edema in a rat model of stroke. These effects of crocin may have been exerted primarily by suppression of the production of free radicals and increased antioxidant enzyme activity.

• Authors: Abedin Vakili, Mohammad Reza Einali, Ahmad Reza Bandegi
• Journal: Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association (J Stroke Cerebrovasc Dis) Vol. 23 Issue 1 Pg. 106-13 (Jan 2014) ISSN: 1532-8511 [Electronic] United States
• PMID: 23182363 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2014 National Stroke Association. Published by Elsevier Inc. All rights reserved.

Chemical References

• Antioxidants
• Carotenoids
• Malondialdehyde
• crocin
• Glutathione Peroxidase
• Superoxide Dismutase

Topics

• Animals
• Antioxidants (metabolism)
• Behavior, Animal (drug effects)
• Body Water (metabolism)
• Brain (enzymology, pathology)
• Brain Edema (drug therapy)
• Brain Ischemia (prevention & control)
• Carotenoids (therapeutic use)
• Cerebral Infarction (pathology, prevention & control)
• Cerebrovascular Circulation (drug effects)
• Dose-Response Relationship, Drug
• Glutathione Peroxidase (metabolism)
• Male
• Malondialdehyde (metabolism)
• Rats
• Rats, Wistar
• Stroke (prevention & control)
• Superoxide Dismutase (metabolism)
• Treatment Outcome