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Abstract
The effect of a 12-week diet of freshwater fish on fatty acid composition of the erythrocyte
membrane, RBC deformability and artificial aggregation behavior of erythrocytes was
studied in 20 healthy subjects. A different quantity of meals containing fish per
week (control group, 1.5 and 3.8 fish meals per week) resulted in an increased content
of n − 3 polyunsaturated fatty acids. The whole cell deformability of single erythrocytes
characterized by a modified micropipette technique (capillary-rigidometer) was significantly
increased dependent on fish intake. The parameter of entry time for cell deformability
had a negative correlation with the
ratio of fatty acids. No change was observed in MCV and MCHC of erythrocytes after
the diet. The artificial aggregation behavior of washed erythrocytes in a suspension
medium of low ionic strength and reduced pH was decreased depending on the number
of fish meals eaten. The present results suggest that a relatively small shift in
the profile of the polyunsaturated fatty acids causes changes in the viscoelastic
properties of the erythrocyte membrane and in the artificially-induced aggregation
of erythrocytes.

Keywords
Abbreviations:
RBC (red blood cells), MCV (mean corpuscular volume), MCHC (mean corpuscular hemoglobin content)To read this article in full you will need to make a payment
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Article info
Publication history
Accepted:
January 10,
1990
Received in revised form:
November 30,
1989
Received:
December 6,
1988
Identification
Copyright
© 1990 Published by Elsevier Inc.