This paper is only available as a PDF. To read, Please Download here.
Abstract
The youngest and oldest erythrocytes of normal human blood were segregated by buoyant
density gradients of BSA. PK in hemolysates of older cells was observed to differ
significantly from that in the younger cells by virtue of lowered optimal activity,
increased pH optimum, decreased electrophoretic mobility, and elevated Michaelis constant
for PEP. The latter was correctable to normal values by small amounts of the activator,
fructose diphosphate. The data suggest that molecular changes in this enzyme associated
with in vivo cell aging may be one pertinent mechanism of senescence in normal human
erythrocytes.
Abbreviations:
PK (pyruvate kinase), Km (apparent Michaelis-Menten constant), PEP (phosphoenolpyruvate), Vmax (maximum velocity of enzymatic reaction under optimal conditions), FDP (fructose-1,6-diphosphate), BSA (bovine serum albumin), RCF (relative centrifugal force), G-6-PD (glucose-6-phosphate dehydrogenase), ADP (adenosine diphosphate), TEA (triethanolamine hydrochloride), U (enzyme units), NADH (reduced nicotine adenine dinucleotide (formerly DPNH)), NAD (oxidized nicotine adenine dinucleotide (formerly DPN)), LDH (lactate dehydrogenase)To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Translational ResearchAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- An inherited molecular lesion of erythrocyte pyruvate kinase. Identification of a kinetically aberrant isozyme associated with premature hemolysis.J. Clin. Invest. 1968; 47: 1929
- Functionally abnormal pyruvate kinase in congenital hemolytic anemia.Acta Haemat. Jap. 1969; 32: 330
- Kinetic alterations of erythrocyte pyruvate kinase (PK) which accompany in vivo cell aging.Blood. 1969; 34: 861
- Separation of rabbit red cells by density in a bovine serum albumin gradient and correlation of red cell density with cell age after in vivo labeling with 59Fe.J. Cell. Physiol. 1966; 67: 197
- Biochemical modifications during the life span of the erythrocyte.Ital. J. Biochem. 1967; 16: 257
- Glucose-6-phosphate dehydrogenase.in: Methods in enzymology. vol. 1. Academic Press, Inc, New York1955: 323
- Pyruvate kinase from muscle.in: Methods in enzymology. vol. 1. Academic Press, Inc, New York1955: 435
- Pyruvate kinase (PK) deficiency hereditary nonspherocytic hemolytic anemia.Blood. 1962; 19: 267
- Pyruvate kinase: clinical aspects.in: Methods in enzymology. vol. 9. Academic Press, Inc, New York1966: 468
- Enzyme kinetics.W. B. Saunders Company, Philadelphia1967
- Elementary statistics with applications in medicine and the biological sciences.Dover Publications, Inc, New York1959
- FDP-activation of yeast pyruvate kinase.Biochem. Biophys. Res. Comm. 1966; 24: 824
- The mechanism of precursor modulation of human pyruvate kinase I by fructose diphosphate.Advances Enzym. Regulat. 1968; 6: 127
- Enzyme activities in human red blood cells of different age groups.Israel. J. Med. Sci. 1966; 2: 291
- Glycolysis and glycolytic enzyme activity of aging red cells in man.Brit. J. Haemat. 1967; 13: 665
- Hexokinase activity as a function of age of the human erythrocyte.Nature. 1963; 199: 704
- Studies on the mechanism of aging of human red blood cells.Ann. N. Y. Acad. Sci. 1958; 75: 95
- Enzyme activity as an indicator of red cell age.Clin. Chim. Acta. 1964; 10: 21
- Alterations in metabolic energetics and cation transport during aging of red cells.J. Clin. Invest. 1959; 38: 1572
- Zur Biochemie der Alterung menschlicher Erythrocyten.Klin. Wschr. 1958; 36: 1008
- Relationship between activity of pyruvate kinase and age of the normal human erythrocyte.Nature. 1965; 205: 507
- Enzymes and radioactivity in erythrocytes of different ages.Nature. 1959; 184: 643
- Characteristics of erythrocytes of different ages. II. Enzyme activity and osmotic fragility.Canad. J. Biochem. 1963; 41: 2287
- Glycolysis in young and mature normal human erythrocytes.Nature. 1963; 198: 1312
- Control of glycolysis in the human red blood cell.J. Biol. Chem. 1966; 241: 4848
- Anemia emolitica congenita non sferocitica da anomalie della piruvatochinasi.Haemat. Arch. 1966; 51: 836
- Hexokinase isozyme patterns of human erythrocytes and leukocytes.Nature. 1966; 212: 944
- Lactic dehydrogenase isozymes and ageing of erythrocytes.Nature. 1964; 204: 883
- Alterations of erythrocyte lactate dehydrogenase in man.Blood. 1965; 26: 63
- Altered electrophoretic mobilities of some erythrocytic enzymes as a function on their age.Nature. 1965; 208: 76
Article info
Publication history
Accepted:
May 22,
1970
Received:
March 19,
1970
With the technical assistance of KLAUS K. KÜRSCHNER and MARY LU WILSONFootnotes
☆Supported by grants from the Veterans Administration and the United States Public Health Service.
☆☆Miss Ruth Exley kindly provided assistance with manuscript preparation.
Identification
Copyright
© 1970 Published by Elsevier Inc.