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- W2025962847 abstract "This study was conducted to determine if the accelerated telomere attrition that occurs as a consequence of allogeneic stem cell transplantation leads to measurable functional defects. Telomere lengths in mononuclear leukocytes obtained from 15 long-term allogeneic stem cell transplant recipients and their respective donors were determined by Southern hybridization and densitometric analysis. Functional assays evaluated the ability of these cells to proliferate in response to a mitogenic stimulus and to differentiate under appropriate cytokine stimulation. Lymphocyte proliferation in response to phytohemagglutinin was determined by measurement of (3)[H]thymidine uptake. The ability of circulating myeloid cells to differentiate was determined after incubation of peripheral blood mononuclear cells with IL-3 and GM-CSF. A total of 13 patients demonstrated telomeric loss, ranging from 0.1 to 3.7 kbp. Strikingly, lymphocytes from 14 of the 15 patients demonstrated a significant decrease in proliferation when compared to their respective donors (68%+/-22, P=0.001). All patients demonstrated at least a 50% decrease in the number of myeloid colony-forming units when compared to their respective donors (P<0.0001). A decreased ability of hematopoietic cells to proliferate and differentiate is phenotypically consistent with an aged immune system. This may correlate with diminished clinically relevant immune responses to infection or vaccination, as seen in the elderly." @default.
- W2025962847 created "2016-06-24" @default.
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- W2025962847 date "2004-01-01" @default.
- W2025962847 modified "2023-10-06" @default.
- W2025962847 title "Measurable immune dysfunction and telomere attrition in long-term allogeneic transplant recipients" @default.
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- W2025962847 doi "https://doi.org/10.1038/sj.bmt.1704300" @default.
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