PMID- 14649462 OWN - NLM STAT- MEDLINE DCOM- 20040805 LR - 20041117 IS - 1080-2924 (Print) IS - 1080-2924 (Linking) VI - 9 IP - 4 DP - 2003 TI - Human reticulocytes isolated from peripheral blood: maturation time and hemoglobin synthesis. PG - 198-206 AB - A pure population of young reticulocytes was isolated from the blood of healthy blood donors by an immunomagnetic technique. The young reticulocytes isolated had a larger mean corpuscular volume (MCV) but lower mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC) than reticulocytes in peripheral blood. The cells were incubated in vitro for 5 days with hemolysis less than 5%. Maturation of reticulocytes was studied with 4 different systems: new methylene blue-stained smears and flow cytometry after auramine O, oxazine 750, or thiazole orange staining. The maturation process from reticulocytes to erythrocytes had a half-life of 30 hours estimated by visual counting. Reticulocytes analyzed with flow cytometers had half-lives of 20, 28, and 29 hours with Coulter Epics XL, Sysmex R-1000, and Bayer H*3 devices, respectively. Total maturation time was 4 to 5 days. During maturation, the reticulocyte MCV gradually decreased with a concomitant increase in reticulocyte MCHC. The reticulocytes synthesized hemoglobin, and the MCH of the cells increased approximately 7% during the incubation period. Taking into account loss of hemoglobin-containing vesicles during reticulocyte maturation, we estimated that more than 20% of hemoglobin in erythrocytes was synthesized in reticulocytes after release from bone marrow. FAU - Skadberg, Oyvind AU - Skadberg O AD - Institute of Clinical Biochemistry, Haukeland University Hospital, University of Bergen, Bergen, Norway. oyvind.skadberg@helse-bergen.no FAU - Brun, Atle AU - Brun A FAU - Sandberg, Sverre AU - Sandberg S LA - eng PT - Journal Article PL - United States TA - Lab Hematol JT - Laboratory hematology : official publication of the International Society for Laboratory Hematology JID - 9615688 RN - 0 (Hemoglobins) RN - 0 (hemoglobin A, carboxymethylated-) RN - 9034-51-9 (Hemoglobin A) SB - IM MH - Blood Cells MH - Cell Differentiation MH - Cell Size MH - Cells, Cultured MH - *Erythropoiesis MH - Hemoglobin A/biosynthesis MH - Hemoglobins/*biosynthesis MH - Humans MH - Immunomagnetic Separation MH - Kinetics MH - Reticulocytes/*cytology/metabolism EDAT- 2003/12/03 05:00 MHDA- 2004/08/06 05:00 CRDT- 2003/12/03 05:00 PHST- 2003/12/03 05:00 [pubmed] PHST- 2004/08/06 05:00 [medline] PHST- 2003/12/03 05:00 [entrez] PST - ppublish SO - Lab Hematol. 2003;9(4):198-206.