Indium-111-labelled human platelets: a method for use in severe thrombocytopenia

Area of Science:

• Nuclear Medicine
• Hematology
• Biotechnology

Background:

• Severe thrombocytopenia presents challenges for platelet monitoring.
• Accurate assessment of platelet kinetics is crucial for managing bleeding disorders.

Purpose of the Study:

• To describe and evaluate a simple method for labeling autologous human platelets with Indium-111-oxine.
• To assess the viability and efficacy of labeled platelets in patients with severe thrombocytopenia.

Main Methods:

• Autologous human platelets were isolated from blood via differential centrifugation.
• Platelets were labeled with Indium-111-oxine in saline.
• Twenty patients with immune thrombocytopenia were investigated.

Main Results:

• A mean of 55% of platelets were harvested with 49% labeling efficiency.
• Low contamination with red cells and plasma was observed.
• Labeled platelets demonstrated viability through in vitro aggregation, circulation recovery, and survival time.

Conclusions:

• The described method is simple and effective for labeling autologous platelets.
• This technique allows for quantitative platelet imaging in patients with severe thrombocytopenia.
• The labeled platelets are viable and suitable for diagnostic imaging.