Relationship between clotting activity and phosphatidylserine expression on erythrocyte membranes in polycythemia vera patients with theJAK2 V617Fmutation

作者：Hiroshi Fujita, Ryoko Sakuma, Junji Tomiyama, Tamae Hamaki, Akira Ohwada, Shigeko Nishimura · 发表于：Archives of Physiology and Biochemistry · 年份：2011 · DOI：10.3109/13813455.2011.571262 · 被引用次数：4 · 研究领域：Myeloproliferative Neoplasms: Diagnosis and Treatment、Erythrocyte Function and Pathophysiology、Blood properties and coagulation

INTRODUCTION: Polycythemia vera (PV) accompanies the clinical course of thrombosis. Phosphatidylserine (PS) expression on the plasma membrane has been known to be one of place where the coagulation system activates. We studied the relationship between clotting factor activity and PS expression on the erythrocyte membrane in patients with erythrocytosis. METHODS: The coagulation test and PS expression in 23 patients with erythrocytosis were measured. PS expression was determined indirectly by measuring annexin V binding to erythrocytes using fluorescence activated cell sorter analysis (FACS). RESULTS: The activity of clotting factors (II, V, VII, VIII, von Willebrand factor, IX, X) was significantly lower in PV than in the mutation-negative erythrocytosis. There was a significant correlation between reduced activity of clotting factors such as V, X, and IX and increased PS expression of the erythrocyte membrane. CONCLUSION: Increased expression of PS on the erythrocyte membrane may reduce the activities of clotting factors in PV patients with JAK2 V617F mutation.