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Platelet activation in diabetic cardiovascular autonomic neuropathy
1Diabetes Research Institute, Heinrich-Heine University, Duesseldorf, Germany.
Insights
Diabetic cardiovascular autonomic neuropathy (CAN) is linked to increased platelet activation in Type 1 diabetes. This heightened platelet activity suggests a greater risk of blood clots in individuals with diabetic autonomic dysfunction.
Area of Science:
- Cardiology
- Diabetology
- Hematology
Background:
- Platelet activation is implicated in myocardial ischemia-related arrhythmias.
- Diabetic cardiovascular autonomic neuropathy (CAN) is a common complication of Type 1 diabetes.
Purpose of the Study:
- To investigate the association between diabetic CAN and intravascular platelet activation in Type 1 diabetes mellitus patients.
Main Methods:
- Flow cytometry was used to assess platelet activation markers (CD63, CD62, thrombospondin, LIBS-1).
- Thirty Type 1 diabetes patients were studied, with 15 diagnosed with CAN and 15 without CAN (control group).
Main Results:
- Patients with CAN exhibited significantly higher levels of activated platelets (CD63+, CD62+, thrombospondin+) compared to controls.
- No significant difference in LIBS-1 expression or correlation with glucose metabolism was observed.
Conclusions:
- Cardiovascular autonomic neuropathy is associated with increased platelet activation in Type 1 diabetes.
- Elevated platelet activation in CAN may indicate an increased prothrombotic state, contributing to diabetic cardiovascular complications.
Aims:
Platelet activation is known to be associated with arrhythmic effects in myocardial ischaemia. The present study attempts to clarify whether diabetic cardiovascular autonomic neuropathy (CAN) is associated with intravascular platelet activation.
Methods:
Platelet activation was assessed by flow cytometry analysis in 30 patients with Type 1 diabetes mellitus screened for diabetic complications. Fifteen patients showed evidence of CAN as assessed by a battery of standard cardiovascular autonomic reflex tests. Fifteen patients without CAN were then selected as a matched control group. Platelet activation was assessed by flow cytometric detection of activation-dependent platelet membrane antigens (P-selectin (CD62), thrombospondin, lysosomal GP53 (CD63) and ligand-induced binding site-1 of GPIIb/IIIa (LIBS-1)).
Results:
Significantly more activated platelets were detected in the patients with CAN showing 20.9% (coefficient of variation (CV) 44%) CD63+ (vs. 17.2% (CV 19%) in controls, P < or = 0.05), 6.4% (CV 87%) CD62+ (vs. 4.1% (CV 37%), P < or = 0.05), and 6.7% (CV 55%) thrombospondin+ (vs. 4.6% (CV 39%), P < or = 0.01) platelets, respectively. LIBS-1 on platelets was not significantly different between patients with and without CAN. No correlation was found between glucose metabolism and platelet activation.
Conclusions:
Cardiovascular autonomic neuropathy is associated with platelet activation in Type 1 diabetes mellitus. The high platelet activation may reflect an increased prothrombotic state in diabetic cardiovascular autonomic dysfunction.