| Autor: |
Petkova-Kirova P; Institute of Molecular Cell Biology, Saarland University, Homburg, Germany., Hertz L; Theoretical Medicine and Biosciences, Saarland University, Homburg, Germany.; Experimental Physics, Saarland University, Saarbrücken, Germany., Danielczok J; Theoretical Medicine and Biosciences, Saarland University, Homburg, Germany., Huisjes R; Department of Clinical Chemistry & Haematology, University Medical Center Utrecht, Utrecht, Netherlands., Makhro A; Red Blood Cell Research Group, Institute of Veterinary Physiology, Vetsuisse Faculty, Zurich Center for Integrative Human Physiology (ZIHP), University of Zürich, Zurich, Switzerland., Bogdanova A; Red Blood Cell Research Group, Institute of Veterinary Physiology, Vetsuisse Faculty, Zurich Center for Integrative Human Physiology (ZIHP), University of Zürich, Zurich, Switzerland., Mañú-Pereira MDM; Vall d'Hebron Research Institute, Vall d'Hebron University Hospital, Barcelona, Spain., Vives Corrons JL; Red Blood Cell Defects and Hematopoietic Disorders Unit, Josep Carreras Leukaemia Research Institute, Barcelona, Spain., van Wijk R; Department of Clinical Chemistry & Haematology, University Medical Center Utrecht, Utrecht, Netherlands., Kaestner L; Theoretical Medicine and Biosciences, Saarland University, Homburg, Germany.; Experimental Physics, Saarland University, Saarbrücken, Germany. |
| Abstrakt: |
Congenital haemolytic anaemias are inherited disorders caused by red blood cell membrane and cytoskeletal protein defects, deviant hemoglobin synthesis and metabolic enzyme deficiencies. In many cases, although the causing mutation might be known, the pathophysiology and the connection between the particular mutation and the symptoms of the disease are not completely understood. Thus effective treatment is lagging behind. As in many cases abnormal red blood cell cation content and cation leaks go along with the disease, by direct electrophysiological measurements of the general conductance of red blood cells, we aimed to assess if changes in the membrane conductance could be a possible cause. We recorded whole-cell currents from 29 patients with different types of congenital haemolytic anaemias: 14 with hereditary spherocytosis due to mutations in α-spectrin, β-spectrin, ankyrin and band 3 protein; 6 patients with hereditary xerocytosis due to mutations in Piezo1; 6 patients with enzymatic disorders (3 patients with glucose-6-phosphate dehydrogenase deficiency, 1 patient with pyruvate kinase deficiency, 1 patient with glutamate-cysteine ligase deficiency and 1 patient with glutathione reductase deficiency), 1 patient with β-thalassemia and 2 patients, carriers of several mutations and a complex genotype. While the patients with β-thalassemia and metabolic enzyme deficiencies showed no changes in their membrane conductance, the patients with hereditary spherocytosis and hereditary xerocytosis showed largely variable results depending on the underlying mutation. |
