Related Experiment Videos
Platelet factor 4, beta-thromboglobulin and thrombospondin levels in type I diabetes mellitus patients
M Bayraktar1, S Dündar, S Kirazli
1Department of Endocrinology, Hacettepe University, School of Medicine, Ankara, Turkey.
Insights
Diabetic patients show higher thrombospondin levels, suggesting it may indicate platelet activation in diabetes. Beta-thromboglobulin and platelet factor 4 levels were similar between groups.
Area of Science:
- Biochemistry
- Hematology
- Endocrinology
Background:
- Platelet alpha-granules store proteins like beta-thromboglobulin, platelet factor 4, and thrombospondin.
- These proteins are released during platelet activation, a process relevant to diabetes complications.
Purpose of the Study:
- To investigate plasma levels of platelet-derived proteins in type I diabetes mellitus.
- To determine if thrombospondin can serve as a marker for in vivo platelet activation in diabetic patients.
Main Methods:
- Assayed plasma concentrations of beta-thromboglobulin, platelet factor 4, and thrombospondin.
- Compared levels between 30 type I diabetic patients and 15 healthy controls.
- Analyzed subgroups of diabetic patients with and without complications.
Main Results:
- Thrombospondin concentrations were significantly higher in diabetic patients (136.6 ng/ml) compared to controls (91.2 ng/ml).
- Diabetic patients with complications showed elevated thrombospondin (150.4 ng/ml) versus controls.
- No significant differences were found in beta-thromboglobulin or platelet factor 4 levels between groups.
Conclusions:
- Elevated plasma thrombospondin suggests increased in vivo platelet activation in type I diabetes.
- Thrombospondin may be a useful biomarker for monitoring platelet release reactions in diabetes.
Abstract:
The proteins beta-thromboglobulin, platelet factor 4 and thrombospondin are stored in platelet alpha-granules and released from the platelet by the release reaction. The assays of these proteins were studied in patients with type I diabetes mellitus (n = 30) and a healthy control group (n = 15). Platelet factor 4 and beta-thromboglobulin levels were not significantly different in both groups but thrombospondin concentrations in diabetic patients were significantly higher than those of the control group (136.6 +/- 14.2 ng/ml vs 91.2 +/- 14.3 ng/ml, P < 0.05). When the diabetic patients were divided into those with or without complications, the diabetic patients with complications (n = 11) had significantly elevated plasma thrombospondin concentrations compared with the control group (150.4 +/- 23.7 ng/ml vs 91.2 +/- 14.3 ng/ml, P < 0.05), while thrombospondin concentrations in the control group were not statistically different from the diabetic patients without complications. Plasma beta-thromboglobulin and platelet factor 4 levels were not significantly different between the diabetic and the control group. It is suggested that thrombospondin may be a convenient marker of in vivo platelet release reaction.