Altered platelet membrane dynamic properties in type 1 diabetes

Laura Mazzanti, Rosa A. Rabini, Paolo Fumelli, Daniela Martarelli, Roberto Staffolani, Eleonora Salvolini, Giovanna Curatola

Research output: Contribution to journalArticlepeer-review


A modified platelet response to aggregating stimuli is supposed to play a role in the pathogenesis of diabetic macroangiopathy. We studied the fluidity and microheterogeneity of the external surface of the platelet membrane and the activities of the plasma membrane Na+-K+-ATPase and Ca2+-ATPase in 21 men with type 1 diabetes and in 20 control subjects before and after in vitro thrombin addition. In the resting state, platelets from type 1 diabetic patients showed an increased fluidity and microheterogeneity of the platelet membrane, a higher Ca2+-ATPase activity, and a reduced Na+-K+-ATPase activity in comparison with platelets from healthy subjects. The fatty acid composition was also modified, with increased C 16:1 and decreased C 18:0 content. Control cells incubated with thrombin showed a modification of the membrane parameters opposite to the response observed in type 1 cells after the stimulation. The incubation of control platelets in the resting state with high concentrations of glucose modified the fluidity of the plasma membrane Na+-K+-ATPase and Ca2+- ATPase activities in an opposite way in comparison with the alterations observed in type 1 platelets. This study suggests that in type 1 diabetic patients, the platelet membrane responds to activation with a molecular remodeling different from the response of healthy subjects. The abnormal organization of the membrane might contribute to the altered platelet functions in type 1 diabetic patients, but acute exposure to high glucose levels does not seem able to modify the platelet membrane in the way observed in type 1 diabetes.

Original languageEnglish
Pages (from-to)2069-2074
Number of pages6
Issue number12
Publication statusPublished - Dec 1997

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism


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