Genetic control of glycolysis in human erythrocytes.
نویسندگان
چکیده
We have studied heritability of the concentration of each glycolytic intermediate and adenine nucleotide in the cytosol of human erythrocytes obtained from a random sample of apparently healthy young individuals. Preliminary to analysis of heritability, each trait was statistically described and the effects attributable to variation in measured concomitants were removed by regression. Heritability was estimated using the family-set method. This method removes covariances between the index case, sibling and first cousin, due to those environmental determinants of the phenotypic values that are shared with a matched, unrelated control member of the family set. It also removes covariances due to environments that are shared by siblings and first cousins. Heritability was estimated by employing the fact that the variance of differences between first cousins minus the variance of differences between full siblings estimates three-fourths of the additive genetic variance. The heritability estimates for G6Pdagger, F6P, ATP and some other metabolite concentrations are high and significantly greater than zero. The heritabilities of G6P and F6P are likely attributable to genetic variation in the in vivo activity of HK and/or PFK, because the concentrations of these metabolites are tightly controlled by the two regulatory enzymes. Statistically significant heritability estimates for HK and PFK mass action ratios strongly suggest genes are responsible for a portion of the quantitative variation in these enzyme activities. Since HK and PFK regulate glycolysis and the production of ATP, genetic variation in their activities might be causally related to the heritability of ATP concentration.
منابع مشابه
Erythrocyte glycolysis and its marked alterations by muscular exercise in type VII glycogenosis.
Levels of erythrocyte glycolytic intermediates after the phosphofructokinase (PFK) step, including 2,3-bisphosphoglycerate (2,3-DPG), were decreased at rest in patients from separate families with type VII glycogenosis. The concentration of 2,3-DPG was about half of the normal control value during a period of unrestricted daily activity but was further decreased to one third of normal after a o...
متن کاملStudies of Human HbAA Erythrocyte Osmotic Fragility Index of Non-Malarious Blood in the Presence of Five Anti-malarial Drugs
Background: The capacity of human HbAA erythrocytes of non-malarious blood to withstand osmotic stress in the presence of five antimalarial drugs, Chloroquine phosphate, Quinine, FansidarTM, CoartemTM and HalfanTM was studied in vitro. Materials and Methods: Aqueous solutions of four increasing concentrations of the drugs used in this investigation were in the order: 0.2%, 0.4%, 0.6% and 0.8% (...
متن کاملGenetic variation in activity of the enzymes of glycolysis and gluconeogenesis between inbred strains of mice.
Variation in the activity of 21 liver and 15 erythrocyte enzymes between seven inbred strains of mice has been studied in a single area of metabolism, glycolysis and gluconeogenesis. Most of the variation between the strains is genetic. From the variation within and between inbred strains heritabilities (H2) were determined. Out of 35, 26 showed significant values above 0.4. A comparison with p...
متن کاملتاثیر ورزش مستمر بر کاهش آسیبپذیری غشاء سلولی، وضعیت دفاع آنتیاکسیداتیو و استرس اکسیداتیو
Background & Aim: The biological effects of potent oxidative agents in human body are under anti-oxidative control. Functional defects of organs may result from reactions of free radicals with the cell membrane. It is known that major targets of oxygen radicals are cell membrane lipids. Some reports indicate the role of peroxides in development of atherosclerosis. Human body tissues(eg.eryt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Genetics
دوره 94 3 شماره
صفحات -
تاریخ انتشار 1980