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29 avril 2011 5 29 /04 /avril /2011 11:08
Phytother Res. 2008 Nov;22(11):1527-32.

Antiinflammatory effect of the ethanol extract of Berberis koreana in a gerbil model of cerebral ischemia/reperfusion.

Source

Department of Anatomy and Neurobiology, College of Medicine, Hallym University, Chuncheon, South Korea.

Berberis koreana extract (BE) has a strong neuroprotective effect after ischemic stroke in gerbils, which is associated with the inhibition of the N-methyl-d-aspartate receptor.

The present study examined the antiinflammatory mechanism of BE after ischemic damage in vitro and in vivo.

The BE used contained on average 7.39 +/- 0.78 mg/g of berberine. In PC12 cells with inflammation, prostaglandin E2 (PGE2) production was significantly reduced by BE.

About 75% of pyramidal cells in the hippocampal CA1 region of gerbils exposed to 5 min of transient ischemia were protected from ischemic damage by BE. Cyclooxygenase-2 (COX-2) immunoreactivity and its protein level in the CA1 region of vehicle-treated animals exposed to an ischemic insult increased with time post-ischemia, whereas no such changes were observed in BE-treated animals exposed to ischemia.

PGE2 production in BE-treated ischemic animals was significantly lower than that observed in vehicle-treated ischemic animals.

 

Summarizing, the potent neuroprotective effect of BE was found to be due to the inhibitions of COX-2 expression and PGE2 production and its antiinflammatory activity.

PMID:
 
18688884
 
[PubMed - indexed for MEDLINE]




Phytother Res. 2008 Aug;22(8):999-1012.

Pharmacological and therapeutic effects of Berberis vulgaris and its active constituent, berberine.

Source

Pharmacodynamy and Toxicology Department, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, I.R. Iran.

Barberry (Berberis vulgaris L. family Berberidaceae) is well known in Iran and various parts of this plant including its root, bark, leaf and fruit have been used as folk medicine. The two decades of research has demonstrated different pharmacological and therapeutic effects of B. vulgaris and its isoquinoline alkaloids (particularly berberine).

Studies carried out on the chemical composition of the plant show that the most important constituents of this plant are isoquinoline alkaloids such as berberine, berbamine and palmatine.

Berberine represents one of the most studied among the naturally occurring protoberberine alkaloids. In addition to B. vulgaris (barberry), berberine is present in many other plants and is used for the treatment of different diseases. This article reviews the traditional uses and pharmacological effects of total extract and the most active ingredient of B. vulgaris (berberine).

PMID:
 
18618524
 
[PubMed - indexed for MEDLINE]


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