What question did this study set out to answer?

To examine the effects of chronic ethanol consumption on nitric oxide production and test whether polyenylphosphatidylcholine protects against peroxynitrite-mediated liver toxicity.

June 1, 2002Alcoholism Clinical and Experimental Research

Ethanol Consumption Increases Nitric Oxide Production in Rats, and Its Peroxynitrite-Mediated Toxicity Is Attenuated by Polyenylphosphatidylcholine

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Authors

EBEnrique BaraonaTransnational Press London GZGuillermo A. ZeballosNew York Medical College LSLilia ShoichetThe King's College

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Implication

Animal study demonstrates that polyenylphosphatidylcholine reduces chronic ethanol-induced peroxynitrite hepatotoxicity in rats, suggesting therapeutic potential against alcohol-related liver injury.

Key Points

To examine the effects of chronic ethanol consumption on nitric oxide production and test whether polyenylphosphatidylcholine protects against peroxynitrite-mediated liver toxicity.
Rats (N=36) were pair-fed liquid diets containing 36% of energy as ethanol or carbohydrate for 24 days and analyzed 90 minutes post-feeding.
Diets were supplemented with either polyenylphosphatidylcholine (3 g/L) or an isocaloric control mix of essential fatty acids and choline.
Arterial blood and liver nitric oxide were measured by chemiluminescence, inducible nitric oxide synthase activity was assessed, and peroxynitrite injury was quantified via nitrotyrosine protein residues.
Ethanol administration doubled blood nitric oxide levels and increased liver cytosolic nitric oxide by 52% (p < 0.01), an effect significantly blunted by polyenylphosphatidylcholine.
Chronic ethanol induced inducible nitric oxide synthase and microsomal cytochromes P-450, increasing toxic nitrotyrosine protein residues by 18% (p < 0.01) predominantly in steatotic hepatocytes.
Polyenylphosphatidylcholine attenuated ethanol-induced cytosolic and microsomal enzyme activities while acting as an antioxidant to block nitrotyrosine accumulation; acute ethanol did not alter nitrotyrosine levels.

Cite This Study

Baraona et al. (2002) studied this question.

synapsesocial.com/papers/6a89ce6b9be9d02581bd8353 https://doi.org/10.1097/00000374-200206000-00019

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Implication

Animal study demonstrates that polyenylphosphatidylcholine reduces chronic ethanol-induced peroxynitrite hepatotoxicity in rats, suggesting therapeutic potential against alcohol-related liver injury.

Ethanol Consumption Increases Nitric Oxide Production in Rats, and Its Peroxynitrite-Mediated Toxicity Is Attenuated by Polyenylphosphatidylcholine

Discussion

Member takes

Implication

Key Points

Cite This Study

Ethanol Consumption Increases Nitric Oxide Production in Rats, and Its Peroxynitrite-Mediated Toxicity Is Attenuated by Polyenylphosphatidylcholine

Discussion

Member takes

Implication

Key Points

Cite This Study

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