Progressive telomere shortening in aplastic anemia

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Abstract

Improved survival in aplastic anemia (AA) has shown a high incidence of late clonal marrow disorders. To investigate whether accelerated senescence of hematopoietic stem cells might underlie the pathophysiology of myelodysplasia (MDS) or paroxysmal nocturnal hemoglobinuria (PNH) occurring as a late complication of AA, we studied mean telomere length (TRF) in peripheral blood leukocytes from 79 patients with AA, Fanconi anemia, or PNH in comparison with normal controls. TRF lengths in the patient group were significantly shorter for age than normals (P < .0001). Telomere shortening was apparent in both granulocyte and mononuclear cell fractions, suggesting loss at the level of the hematopoietic stem cell. In patients with acquired AA with persistent cytopenias (n = 40), there was significant correlation between telomere loss and disease duration (r = -.685; P

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Ball, S. E., Gibson, F. M., Rizzo, S., Tooze, J. A., Marsh, J. C. W., & Gordon-Smith, E. C. (1998). Progressive telomere shortening in aplastic anemia. Blood, 91(10), 3582–3592. https://doi.org/10.1182/blood.v91.10.3582

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