1INTRODUCTIONPlatelets are enucleated megakaryocytic cell fragments released under the shear stress. The sequence of genesis begins with promotion of cytoplasmic elongation acting through microtubular architecture resulting in proplatelet formation and release from the megakaryocyte. Proplatelets evolve to reticulated platelets (RPs) when released from the bone marrow. RPs are characterized by an abundance of megakaryocyte‐derived RNA, proteins, and molecular machinery necessary for translation. These RPs can be distinguished from other platelets by selective binding to thiazole orange dye (TO), which stains ribonucleic acid and enhances its fluorescence signal.Whereby RPs are felt to represent young newly formed platelets analogous to the erythroid reticulocyte, their proportion may represent an indicator or index of platelet turnover in the circulation. There are several clinical entities that support this concept, including immune thrombocytopenic purpura and essential thrombocythemia. With bone marrow failure and chemotherapy, RP content falls. An elevation of RP precedes platelet count recovery after chemotherapy or with growth factor therapy.Beyond morphologic distinction, RP may be more active and more prone to thrombus participation relative to their older counterparts. High RP content has also been reported in several thrombotic conditions such as ischemic stroke, ischemic heart disease, and particularly acute coronary syndromes. In these conditions,
Journal of Cardiovascular Electrophysiology – Wiley
Published: Jan 1, 2018
Keywords: ; ;
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