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Electrokinetic behaviour and surface sialic acid status of blood platelets in essential thrombocythaemia (ET)

Abstract: We have previously reported, for platelets from patients with idiopathic thrombocytopenic purpura, that there was in increased electrophoretic mobility that was related to their increased sialic acid content. Heterogeneity in the circulating platelet pool of patients with essential thrombocythaemia (platelet counts 600–1000 × 109/l) has also been investigated by preparative continuous flow electrophoresis (CFE). The surface charge‐dependent separation profiles of all the patients' platelets showed marked anodal shifts compared with the profiles of platelets from age‐ and sex‐matched control subjects separated under identical conditions. The increase above normal in the net electronegativity of the patients' platelets could not be accounted for by differences in surface neuraminidase‐labile or total platelet sialic acid content.