Analbuminaemia: a natural model of metabolic compensatory systems

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Abstract
Important clinical signs are usually not present in analbuminaemia, a congenital condition inherited as an autosomal recessive trait, but several biochemical alterations in proteins, cholesterol, phospholipids and plasma beta lipoproteins have been observed. We studied two sibs, R.U. and R.R., with this disease and observed a striking increase in the variables mentioned above as well as a high LDL fraction with concomitant increase in apo B; increases in HDL3 and apo A-I and A-II levels were also observed. The lipoproteins, however, were not altered in morphology but showed a slight increase in lipid/protein ratio. Post-heparin lipolytic activity was normal in the male patient and reduced in the female while LCAT enzyme activity instead was increased in both. Fatty acids bound to phospholipids and serum cholesterol were mostly monounsaturated. Free fatty acid concentration was normal and they appeared mostly bound to the LDL and HDL3 fractions, which are increased in this disease and appear to replace albumin in one of its main carrier functions.

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