Publication Date:
2010-11-19
Description:
Abstract 3375 Introduction. Telomere are effective sensors of cell integrity and their accelerated shortening is a marker of genetic and/or proliferative stress in several tissues including the hematopoietic compartment. Severe telomere attrition has been indeed observed in aplastic anemia and post-transplant setting. Little is currently known on the genetic integrity of Ph-negative hematopoietic cells (HCs) repopulating the bone marrow (BM) after successful chronic myeloid leukemia (CML) treatment. We thus decided to verify whether severe telomere shortening might occur in this setting and to assess whether its presence might correlate to genetic and functional impairment of Ph-negative hematopoiesis. Patients and methods. We investigated 81 CML patients with persistent (≥12 months) complete cytogenetic remission (CCyR). Median age was 62 years (23-88), M/F ratio was 1.5. Median time from diagnosis and CCyR were 4 years (1-18) and 3 years (1-12) respectively. 15 patients had acquired cytogenetic abnormalities (CA) (del7: 4 patients, +8: 5 patients, del5q: 2 patients, del or +Y: 2 patients, other CA: 2 patients). Telomere length (TL) analysis was performed by Southern Blotting on polymorphonucleates (PMN) and on monocyte-depleted PBMC (MD-PBMC) to monitor both the myeloid and lymphoid compartments. As control group we analyzed 76 age-matched healthy donors. Prospective follow-up monitoring of TL was performed on 56 CML patients with a median time of 22 months from the first determination (range 12–20). Results. PMN (but not MD-PBMC) from CML patients showed a major erosion of their telomeric DNA (median loss 1294 bp p
Print ISSN:
0006-4971
Electronic ISSN:
1528-0020
Topics:
Biology
,
Medicine
Permalink