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Platelet volume, density and 5 HT organelles (mepacrine test) in acute leukaemia
Abstract:
Qualitative platelet parameters (volume, 5 hydroxy-tryptamine (5 HT) organelles studied by the mepacrine test, and density) were evaluated in 31 patients with acute leukaemia: 11 myelomonocytic (AML), 8 lymphoblastic (ALL), 12 granulocytic (AGL). Macrothrombocytosis was observed in most of the cases of AML, was rare in AGL and was never found in ALL. The 5 HT organelles/volume ratio was normal in AGL and ALL but was significantly decreased in AML. In contrast, platelet density distribution was always abnormal whatever the platelet volume and 5 HT organelle concentration. Thus, using simple new methods, convenient even in cases of thrombocytopenia, we demonstrate that qualitative platelet abnormalities are a constant feature in acue leukaemia and that they are more severe in AML.
Insights
Qualitative platelet abnormalities are a constant feature in acute leukaemia, particularly severe in acute myeloid leukaemia (AML). Platelet volume, 5-hydroxytryptamine (5-HT) organelles, and density were evaluated in leukaemia patients.
Area of Science:
- Hematology
- Oncology
- Biochemistry
Background:
- Platelet function is crucial in hemostasis and can be altered in various hematological disorders.
- Qualitative platelet parameters offer insights into platelet health and function.
- Acute leukaemias are characterized by abnormal blood cell development, potentially affecting platelets.
Purpose of the Study:
- To investigate qualitative platelet parameter alterations in patients with acute leukaemia.
- To compare these abnormalities across different subtypes of acute leukaemia: acute myeloid leukaemia (AML), acute lymphoblastic leukaemia (ALL), and acute granulocytic leukaemia (AGL).
- To assess the utility of simple, new methods for evaluating platelet parameters, even in thrombocytopenic patients.
Main Methods:
- Evaluation of qualitative platelet parameters: platelet volume, 5-hydroxytryptamine (5-HT) organelle content (using the mepacrine test), and platelet density.
- Study included 31 patients with acute leukaemia (11 AML, 8 ALL, 12 AGL).
- Analysis of platelet density distribution irrespective of platelet volume and 5-HT organelle concentration.
Main Results:
- Macrothrombocytosis was frequent in AML, rare in AGL, and absent in ALL.
- The ratio of 5-HT organelles to platelet volume was significantly decreased in AML, but normal in AGL and ALL.
- Platelet density distribution was consistently abnormal across all acute leukaemia subtypes, regardless of other parameters.
Conclusions:
- Qualitative platelet abnormalities are a constant finding in acute leukaemias.
- These platelet abnormalities are more pronounced in AML compared to ALL and AGL.
- The evaluated simple methods are convenient for assessing platelet abnormalities, even in thrombocytopenia.