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. 1994 Sep 1;35(3):223–234. doi: 10.1186/BF03548327

Endotoxin and Arachidonic Acid Metabolites in Portal, Hepatic and Arterial Blood of Cattle with Acute Ruminai Acidosis

P Haubro Andersen 1,, M Hesselholt 1, N Jarløv 1
PMCID: PMC8101378  PMID: 7847191

Abstract

Andersen, P. Haubro, M. Hesselholt and N. Jarlev: Endotoxin and arachidonic acid metabolites in portal, hepatic and arterial blood of cattle with acute ruminai acidosis. Acta vet.scand.1994,35,223-234.– Ruminai acidosis was induced experimentally with 70 g barley / kg body weight in 2 rumen fistulated cows with chronic indwelling catheters in the portal vein, in a hepatic vein and the carotid artery. The cows were followed for 24 and 20h after the overfeeding and evaluated clinically and by clinical chemistry. The 2 cows exerted different responses to the treatment. Both cows showed signs of severe ruminai acidosis. Both cows had endotoxin in portal and hepatic vein blood, but only 1 of the cows convincingly developed a systemic endotoxaemia. A pre-hepatic release of the stable prostacyclin and thromboxane metabolites, 6-ketoprostaglandin F and thromboxane B2 was demonstrated in this cow. The results of the present study show that endotoxin and arachidonic acid metabolites of pre-hepatic origin may be factors involved in the pathogenesis of ruminai acidosis, and that investigation of the factors affecting translocation of ruminai endotoxin and subsequent clearing in the liver, will be of importance.

Keywords: Limulus amoebocyte lysate test, haematology, enzyme immunoassay, thromboxane B2, 6-ketoprostaglandin F, j ruminitis, systemic inflammation, clearance, inflammation mediators, chronic catheterization

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Acknowledgments

This study is supported by grants from the Danish Agricultural and Veterinary Research Council (13-4216-1).

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