Activated platelets in subjects at increased risk of IDDM. DENIS Study Group. Deutsche Nikotinamid Interventionsstudie

Diabetologia
D TschoepeE F Lampeter

Abstract

Activated platelets respond to activated leukocytes and endothelial cells via adhesion molecules linking inflammation and thrombosis. Platelets of recent-onset insulin-dependent diabetic (IDDM) patients have been shown to be activated independent of metabolic control. This study evaluates the levels of circulating activated platelets exposing adhesion molecules in healthy subjects at increased risk of IDDM (surface markers were: P-selectin (CD62), thrombospondin, lysosomal GP53 (CD63). From the DENIS and the ENDIT screening programmes 19 identified islet cell antibody positive (titre > or = 20 Juvenile Diabetes Foundation units) first degree relatives of IDDM patients (male/female 9/10; age 22 +/- 15 years; body mass index (BMI): 20.0 +/- 4.3 kg/m2) with clearly normal metabolism (HbA1: 6.1 +/- 0.8%; fasting blood glucose: 4.95 +/- 0.67 mmol/l) were available for this investigation. Platelet CD62 as well as thrombospondin and CD63 expression were determined by flow cytometry. We matched 50 normal volunteers for age (29 +/- 6 years), anthropometric measures (male/female 26/24; BMI: 22.3 +/- 2.8 kg/m2) and metabolic parameters (HbA1: 5.8% +/- 0.3; fasting blood glucose: 4.41 +/- 0.53 mmol/1) served as control subjects. The mean n...Continue Reading

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