Platelet Aggregation Study in Patients With Hemoglobin Eβ Thalassemia in India

Area of Science:

• Hematology
• Public Health
• Thrombosis Research

Background:

• Hemoglobin Eβ thalassemia presents a significant public health challenge in India, particularly West Bengal.
• Thromboembolic events are frequently observed in these patients, especially after splenectomy.
• Platelet hyperactivity is a suspected contributor to the hypercoagulable state.

Purpose of the Study:

• To investigate the role of platelets in the hypercoagulability associated with Hemoglobin Eβ thalassemia.
• To compare platelet aggregation in splenectomized versus nonsplenectomized patients with Eβ thalassemia.
• To assess platelet function in Eβ thalassemia patients relative to healthy controls.

Main Methods:

• Platelet-rich plasma was obtained from 30 patients with Eβ thalassemia (15 splenectomized, 15 nonsplenectomized) and 15 healthy controls.
• Platelet aggregation was measured using four agonists: adenosine 5-diphosphate, adrenaline (epinephrine), collagen, and ristocetin.
• Comparative analysis was performed between patient groups and controls.

Main Results:

• Both splenectomized and nonsplenectomized Eβ thalassemia patients exhibited abnormal platelet aggregation compared to healthy individuals.
• Splenectomized patients demonstrated higher platelet aggregation across all four agonists compared to nonsplenectomized patients.
• A statistically significant difference in aggregation was observed between the two patient groups solely for collagen-induced aggregation.

Conclusions:

• The study confirms a role for platelet hyperaggregation in Hemoglobin Eβ thalassemia.
• Absence of the spleen contributes to enhanced platelet aggregation in these patients.
• Findings suggest that splenic function may modulate platelet activity in Eβ thalassemia.