Relationship of plasma lactoferrin content to neutrophil regeneration and bone marrow infusion

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Abstract
Plasma concentrations of lactoferrin were measured in immediately separated EDTA samples from 5 subjects who had received HLA identical bone marrow transplants for leukaemia or aplastic anaemia and from 7 subjects who were leucopenic as a consequence of chemotherapy for a variety of malignant conditions. Plasma lactoferrin concentrations were found to closely parallel the leucocyte count and were not found to either predict or to antedate leucocyte regeneration. Serial measurements of plasma lactoferrin in a subject with no circulating neutrophils who received a bone marrow graft revealed that the clearance of lactoferrin followed an exponential pattern and had an initial half time of 2.2 h.