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Cai, Huili; Mullier, François; Frotscher, Birgit; Briquel, Marie-Elisabeth; Toussaint, Marie; Massin, Frédéric; Lecompte, Thomas; Latger-Cannard, Véronique
Seminars in thrombosis and hemostasis, 04/2016, Letnik: 42, Številka: 3Journal Article
Dense granule disorder is one of the most common platelet abnormalities, resulting from dense granule deficiency or secretion defect. This study was aimed to evaluate the clinical usefulness of the flow cytometric combination of mepacrine uptake/release assay and CD63 expression detection in the management of patients with suspected dense granule disorder. Over a period of 5 years, patients with abnormal platelet aggregation and/or reduced adenosine triphosphate (ATP) secretion suggestive of dense granule disorder were consecutively enrolled. The flow cytometric assays were systematically performed to further investigate dense granule functionality. Among the 26 included patients, 18 cases showed impaired mepacrine uptake/release and reduced CD63 expression on activated platelets, consistent with δ-storage pool deficiency (SPD). Another seven patients showed decrease in mepacrine release and CD63 expression but mepacrine uptake was normal, indicating secretion defect rather than δ-SPD. Unfortunately, ATP secretion could not be measured in 7 out of the 26 patients due to insufficient sample and/or severe thrombocytopenia. This test combination provides a rapid and effective method to detect the heterogeneous abnormalities of platelet dense granule by distinguishing between storage and release defects. This combination is particularly advantageous for severely thrombocytopenic patients and pediatric patients in which only minimal sample is required.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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