Active transport of 3-O-methyl-glucose by the small intestine in chronically catheterized rats
| Autor: | Michael R. Uhing, R E Kimura |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Male
medicine.medical_specialty Chemistry Biological Transport Active Methylglucosides 3-O-Methylglucose General Medicine Absorption (skin) Small intestine Catheterization Rats Rats Sprague-Dawley Sprague dawley Phlorhizin Endocrinology medicine.anatomical_structure Intestinal Absorption Blood concentration Internal medicine Intestine Small medicine Animals Research Article |
| Zdroj: | Journal of Clinical Investigation. 95:2799-2805 |
| ISSN: | 0021-9738 |
| DOI: | 10.1172/jci117984 |
| Popis: | A method is described for determining the fraction of intestinal 3-O-methyl-glucose (3OMG) absorption that occurs by active transport in chronically catheterized rats without the influence of anesthesia or surgical bowel manipulation. That fraction was determined by simultaneously measuring portal venous-aortic blood concentration gradients (delta C) of 3-O-methyl-glucose (3OMG) and L-glucose, metabolically inert analogues of D-glucose. 3OMG is actively and passively absorbed by the same mechanisms as D-glucose, L-glucose is only passively absorbed. The fraction of 3OMG that is actively transported was calculated from the difference between 3OMG and L-glucose absorption, divided by total 3OMG absorption. We found that more than 94% of 3-O-methyl-glucose is absorbed by active transport when luminal concentrations range from 50 to 400 mM. We conclude that in unrestrained, unanesthetized chronically catheterized rats, most 3OMG is actively absorbed by the intestine even at high luminal concentrations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|