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- W1646556626 abstract "Two cases of PNH in adolescence and childhood are reported. The first presented at age 7½ years with aplastic anemia and improved after splenectomy performed at age 14. The second, a 15-year-old girl, presented with a Coombs-positive hemolytic anemia and has had a course complicated by multiple peripheral thromboses. The clinical and laboratory manifestations, complications, and certain therapeutic aspects of PNH are discussed. Anticoagulant therapy appears indicated in the presence of multiple thrombotic episodes. Erythrocyte metabolic studies revealed normal glycolysis, ATP stability, and GSH content in the cells of a child with a normal reticulocyte count. Mild elevations of glycolysis, noted in the child with a reticulocytosis, was ascribed to a younger mean red cell population since further elevations found in the top reticulocyte-rich layer after centrifugation. Heparin, the anticoagulant used in these studies, had no adverse effect on glycolysis but did inhibit hemolysis and minimize ATP instability when compared to cells suspended in defibrinated serum. Erythrocytes fractionated by centrifugation revealed increased glycolytic enzyme activities of hexokinase, G3PD, PGK, TPI, PK, LDH, G6PD, and 6PGD in the reticulocyte-rich layer. Normal, rather than increased activity of aldolase, a membrane enzyme, may reflect damage to the red cell membrane. PFK, known to be decreased in the erythrocyte of neonates, showed normal activity, but it was lowest in the reticulocyte-rich layer. Fetal hemoglobin was elevated in this layer. AChE deficiency and increased suceptibility to hydrogen perioxide and acid hemolysis confirmed previous reports and were most marked in the young cell layer. The level of increased glycolytic rates and enzyme activity, AChE deficiency, acid hemolysis and peroxide hemolysis were related to the clinical severity of the disease." @default.
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- W1646556626 date "1967-05-01" @default.
- W1646556626 modified "2023-09-23" @default.
- W1646556626 title "Paroxysmal nocturnal hemoglobinuria in childhood and adolescence. Clinical and erythrocyte metabolic studies in two cases." @default.
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