Distribution of tritium labeled 12(S) hydroxy-eicosatetraenoic acid (12-hete) in the rat

P. Cloquet, I. Niot, P. Bouchard, R. Gree, J. P. Lellouche, J. P. Beaucourt, P. Fonlupt, B. Duperray, J. Bezard, M. Lagarde

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8 Scopus citations


The in vivo metabolism of 12-(S)-Hydroxy-eicosatetraenoic acid (12-HETE), the end-lipoxygenase product of arachidonic acid in platelets, has been investigated in the rat. Fifty microcuries of 5,6-[3H]-12-HETE (50 Ci/mmol) were injected to anaesthetized rats and the radioctivity was followed in plasma. At the end of the experiment, various organs of the animal were removed and the radioactivity attached to them was determined. The label of the plasma plateaued to approximately one third of the initial radioactivity ten minutes after the injection. Among the various organs tested (brain, heart intestine, kidney, liver, lungs, spleen, testis/uterus) the kidney was far the most active to accumulate 12-HETE and/or its labelled metabolites, and no radioactivity could be detected in urine during the course of the experiment. The analysis of lipid extracts from the various tissues revealed that 12-HETE was not accumulating in its unesterified form but was likely bound to phospholipids. We conclude that, although the label providing from the initial 12-HETE did not completely disappear from plasma, circulating 12-HETE cannot be considered as a circulating marker of cell activation.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
Issue number1
StatePublished - Jul 1991
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by INSERM and a grant from CNRS (AIP-Medicaments 1987).


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