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Effects of the antioxidants lycium barbarum and ascorbic acid on reperfusion liver injury in rats.

Abstract：

OBJECTIVE:Ischemia/reperfusion (I/R) of the rat liver can induce liver injury through mechanisms involving oxidative and nitrosative stresses. In this study we examined the effects of antioxidants Lycium barbarum (LB) and ascorbic acid on I/R-induced liver injury in rats. METHODS:Liver ischemia was induced by clamping the common hepatic artery and portal vein of rats for 40 minutes. Thereafter, flow was restored with reperfusion for 90 minutes. Blood samples collected before ischemia and after reperfusion were analyzed for alanine transaminase (ALT), lactic dehydrogenase (LDH), hydroxyl radical, and nitric oxide (NO) levels. Pharmacologic interventions included administration of ascorbic acid (100 mg/kg, i.p., 1 hour before I/R) or LB, an extract of Gogi berries: 600 mg in 100 mL of drinking water for 2 weeks prior to experimentation. RESULTS:This protocol resulted in elevation of blood concentrations of NO, hydroxyl radical, ALT, and LDH (P < .001) in the I/R-induced liver injury group. Ascorbic acid significantly attenuated the reperfusion liver injury by attenuating hydroxyl radical (P < .01) and NO (P < .05) release. The LB aggravated I/R-induced liver injury by increasing hydroxyl radical release with no effect on NO release. DISCUSSION AND CONCLUSIONS:This I/R protocol resulted in oxidative and nitrosative stress and liver injury. Ascorbic acid showed significant protective effects on reperfusion liver injury by attenuating hydroxyl radical and NO release. In contrast, LB aggravated liver injury by increasing hydroxyl radical release.

journal_name

Transplant Proc

journal_title

Transplantation proceedings

authors

Wang NT,Lin HI,Yeh DY,Chou TY,Chen CF,Leu FC,Wang D,Hu RT

doi

10.1016/j.transproceed.2009.08.051

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

4110-3

issue

10

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(09)01304-9

journal_volume

41

pub_type

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