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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Crider, B. P. Johnson, J. H. |
| Description | Author Affiliation: Johnson JH ( Veterans Administration Medical Center, Dallas, TX 75216.); |
| Abstract | Increased Na+,K+-ATPase activity observed after chronic ethanol consumption has been examined to determine whether the increase is due to changes in the kinetic properties of the enzyme or increases in the amount of enzyme in the membranes examined. In skeletal muscle and erythrocyte ghosts from rat, as well as from humans, increased Na+,K+-ATPase activity in ethanol-consuming individuals was not accompanied by an increase in the number of ouabain binding sites. In studies with intact human erythrocytes, similar ouabain-sensitive 22Na+ and 86Rb+ pumping rates were observed between normal and ethanol-consuming individuals and the Na+ to Rb+ pumping ratio was found to be 1.5 in all cases. However, ouabain-sensitive lactate plus Pi formation was increased in cells from alcoholic individuals. Thus these data suggest that increased enzyme activity may be due to a kinetic alteration of the Na+,K+-ATPase and that the enzyme may be less efficient in coupling ion pumping to ATP hydrolysis than the enzyme in normal cells. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 86 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1989-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Alcoholism Enzymology Erythrocytes Muscles Sodium-Potassium-Exchanging ATPase Metabolism Animals Erythrocyte Membrane Kinetics Ouabain Pharmacology Rats, Inbred Strains Reference Values Rubidium Blood Sodium Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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