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XB-ART-19813
Biochim Biophys Acta 1995 Apr 28;12561:47-51.
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Evidence for a hepatocyte membrane fatty acid transport protein using rat liver mRNA expression in Xenopus laevis oocytes.

Fitscher BA , Klaassen-Schlüter CM , Stremmel W .


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The aim of the present study was to directly demonstrate that hepatocellular uptake of long-chain fatty acids represents a non-diffusional uptake mechanism. Xenopus laevis oocytes were used for expression of rat liver mRNA to identify the liver fatty acid uptake system. Injection of total rat liver poly(A)+ RNA into oocytes resulted in a dose-dependent increase in fatty acid uptake. The most active mRNA was found in the 1.1-2.1 kb subfraction. In contrast, expression of the liver cytosolic fatty acid binding protein (L-FABP) or the previously suggested candidate carrier protein, mitochondrial aspartate aminotransferase (mGOT), did not induce fatty acid uptake. It is concluded that in rat liver, fatty acid transport represents a protein-mediated transport system.

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