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[Differences in platelet aggregation in various microangiopathic complications of diabetes mellitus]
Insights
Diabetic nephropathy is linked to reduced platelet activity in vitro, contrasting with increased platelet function observed in diabetes without kidney complications. Further research is needed to reconcile these findings.
Area of Science:
- Cardiovascular Research
- Nephrology
- Hematology
Context:
- Diabetes mellitus is a complex metabolic disorder associated with microvascular and macrovascular complications.
- Diabetic nephropathy is a significant complication, affecting kidney function and increasing cardiovascular risk.
- Platelet function abnormalities are increasingly recognized in diabetes, potentially contributing to thrombotic events.
Purpose:
- To investigate in vitro platelet aggregometry in patients with diabetes, stratified by the presence and severity of nephropathy.
- To compare platelet reactivity to various agonists (epinephrine, adenosine diphosphate, collagen, arachidonic acid) between diabetic patients and healthy controls.
- To determine if diabetic nephropathy influences platelet responsiveness.
Summary:
- In vitro platelet aggregometry was performed on 201 diabetic patients and 106 healthy controls.
- Diabetic patients without nephropathy exhibited hyperaggregability to multiple agonists, especially when neuropathy was present.
- Conversely, patients with diabetic nephropathy (with or without azotemia) demonstrated diminished platelet responses to all tested agonists compared to controls.
Impact:
- Diabetic nephropathy is characterized by decreased in vitro platelet reactivity.
- These findings highlight a potential dichotomy in platelet behavior in diabetes: hyperfunction in early stages/without nephropathy and hypo-reactivity in nephropathic patients.
- Further research is warranted to elucidate the mechanisms behind in vitro platelet hypoaggregability in diabetic nephropathy, considering existing evidence of in vivo platelet hyperfunction.
Abstract:
In vitro platelet aggregometry with epinephrine, adenosine-diphosphate, collagen and arachidonic acid was performed in 201 patients with diabetes, and in 106 healthy subjects. Those patients who were free of nephropathy showed hyperaggregability to collagen and arachidonic acid, and also to epinephrine and adenosine diphosphate, when neuropathy occurred. Patients with nephropathy, both with and without azotaemia, had diminished platelet responses to each of the four aggregating agents as compared to age- and sex-matched controls. Aggregability was not dependent on type of diabetes. It is concluded that diabetic nephropathy is characterized by decreased in vitro reactivity of platelets. Further researches are necessary to explain in vitro hypoaggregability besides the numerous evidence of in vivo hyperfunction of platelets in diabetes.