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Research Article Free access | 10.1172/JCI105649
Department of Medicine, Division of Chest Diseases, University of Oregon Medical School, Portland, Oregon
Department of Medicine, Division of Experimental Medicine, University of Oregon Medical School, Portland, Oregon
‡Address requests for reprints to Miles J. Edwards, M. D., Department of Medicine, Division of Chest Diseases, University of Oregon Medical School, 3181 S. W. Sam Jackson Park Road, Portland, Oreg. 97201.
*Received for publication 3 April 1967 and in revised form 12 June 1967.
This work was supported in part by research grant AM 05012 from the National Institutes of Health, by the Oregon Heart Association, by the Cardiovascular Program Project Grant HE-06336 and by the U. S. Atomic Energy Commission, Contract AT (45-1)-581.
Presented in part before a joint meeting of the Western Section, American Federation for Clinical Research and the Western Society for Clinical Research, 28 January 1967, Carmel, Calif.
Find articles by Edwards, M. in: JCI | PubMed | Google Scholar
Department of Medicine, Division of Chest Diseases, University of Oregon Medical School, Portland, Oregon
Department of Medicine, Division of Experimental Medicine, University of Oregon Medical School, Portland, Oregon
‡Address requests for reprints to Miles J. Edwards, M. D., Department of Medicine, Division of Chest Diseases, University of Oregon Medical School, 3181 S. W. Sam Jackson Park Road, Portland, Oreg. 97201.
*Received for publication 3 April 1967 and in revised form 12 June 1967.
This work was supported in part by research grant AM 05012 from the National Institutes of Health, by the Oregon Heart Association, by the Cardiovascular Program Project Grant HE-06336 and by the U. S. Atomic Energy Commission, Contract AT (45-1)-581.
Presented in part before a joint meeting of the Western Section, American Federation for Clinical Research and the Western Society for Clinical Research, 28 January 1967, Carmel, Calif.
Find articles by Rigas, D. in: JCI | PubMed | Google Scholar
Published October 1, 1967 - More info
Normal human erythrocytes were separated according to in vivo age by ultracentrifugation. The “young” and “old” erythrocytes had mean cell ages of approximately 40 and 79 days, respectively. “Young” erythrocytes had a lower oxygen affinity and a higher heme-heme interaction than did “old” erythrocytes. This indicates an impairment of the oxygen-carrying function of erythrocyte hemoglobin with age.
“Young” and “old” erythrocytes were hemolyzed yielding “young” and “old” hemoglobins. “Young” hemoglobin had a comparably lower oxygen affinity than did “old” hemoglobin when the hemolysates were dialyzed against electrolyte-free water.
Exposure to sodium chloride completely obliterated this difference between the oxygen affinities and buffer values of “young” and “old” free hemoglobin. Similar exposure to potassium chloride resulted in partial obliteration of the difference between the oxygen affinities of “young” and “old” hemoglobin. Subsequent removal of sodium chloride by dialysis did not restore the pre-electrolyte differences between the oxygen affinities of “young” and “old” hemoglobin.
This evidence indicates that in vivo aging is accompanied by a conformational change of the hemoglobin molecule, which is probably due to an alteration of electrostatic interactions involving the hemoglobin molecule and which is retained after hemolysis and dialysis against water but is obliterated by addition of electrolyte. It is not possible, however, to decide from the available evidence whether this molecular change occurs independently or as a result of influences by other substances, such as 2,3-diphosphoglycerate, which also change during in vivo aging of the erythrocyte.