Abstract
Erythrocyte membrane characteristics were compared in 15 normal women and 15 women with anorexia nervosa; the patients were studied at hospital admission and again after 1 month of refeeding. At admission, physical properties of erythrocyte membranes, studied with electron spin resonance spectrometry, significantly differed between the anorexic patients and the normal volunteers. Fluidity from the hydrophobic part of the erythrocyte membrane, estimated by the correlation frequency, was decreased in the patients. After 1 month of refeeding, fluidity increased. One of the possible mechanisms of the variation of membrane fluidity could be the effect of cholesterol on membrane structure. Increased cholesterol levels in anorexic subjects could reduce fluidity. These alterations in membrane fluidity could explain some of the neurobiological abnormalities observed in anorexia nervosa.
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