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Incorporation of 14C-linoleic acid in cerebrosides of psoriatic and normal human skin

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Summary

Psoriasis is marked by loss of glycocalyx. Glycocalyx is composed of glycoproteins and glycolipids such as cerebrosides. It was shown that the incorporation of 14C-linoleic acid in cerebrosides of normal and psoriatic human skin is different. In psoriatic epidermis and corium the turnover of this fatty acid is significantly elevated. It is suggested that in psoriasis the epidermal cell is not able to build up a regular carbohydrate sequences of lipids because the false carbohydrate chain activates the degradation of glycolipids and in compensating for the increased degradation raises the synthese rate of glycolipids.

Zusammenfassung

Die Psoriasis ist durch eine starke Verminderung der Glykokalyx gekennzeichnet. Die Glykokalyx wird aus den Kohlenhydratketten der Glykoproteine und Glykolipiden gebildet. Wir bestimmten den Einbau von 14C-Linolsäure in die Cerebroside normaler und psoriatischer menschlicher Haut und stellten fest, daß der “turn-over” dieser Fettsäure in den Cerebrosiden psoriatischer Epidermis und psoriatischen Coriums signifikant erhöht ist. Diese Befunde interpretieren wir als Unfähigkeit der psoriatischen Haut, die vollständigen Kohlenhydratketten in regulärer Sequenz für die Cerebroside zu synthetisieren. Die irregulären und/oder unvollständigen Kohlenhydratketten aktivieren den Abbau dieser Cerebroside, was im Sinne einer Kompensation zur erhöhten Synthese und damit zum erhöhten “turnover” der Fettsäure von Cerebrosiden führt, deren Halbwertzeit gegenüber normaler Haut verkürzt ist.

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Rüstow, B., Metz, D., Kunze, D. et al. Incorporation of 14C-linoleic acid in cerebrosides of psoriatic and normal human skin. Arch Dermatol Res 270, 441–444 (1981). https://doi.org/10.1007/BF00403788

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  • DOI: https://doi.org/10.1007/BF00403788

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