Dietary induction of angiotensin-converting enzyme in proximal and distal rat small intestine
| Autor: | Roger H. Erickson, Danielle Y. Koh, Do Hyong Kim, Young Sam Kim, Byung-Chul Yoon |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Brush border Physiology Peptidyl-Dipeptidase A Organ culture Organ Culture Techniques Physiology (medical) Internal medicine Intestine Small medicine Animals Tissue Distribution RNA Messenger Rats Wistar chemistry.chemical_classification Messenger RNA Hepatology biology Enzyme biosynthesis Body Weight Gastroenterology Angiotensin-converting enzyme Enzyme assay Small intestine Diet Rats Enzyme Endocrinology medicine.anatomical_structure chemistry Enzyme Induction biology.protein |
| Zdroj: | American journal of physiology. Gastrointestinal and liver physiology. 281(5) |
| ISSN: | 0193-1857 |
| Popis: | Induction of angiotensin-converting enzyme was examined in proximal and distal intestinal segments of rats fed a low-protein (4%) diet and then switched to a high-protein (gelatin) diet. Animals were killed at varying time points, and brush-border membranes and total RNA were prepared from the segments. In the proximal intestine, there was a fivefold increase in angiotensin-converting enzyme levels after 14 days but only a twofold change in mRNA. In the distal intestine, there was no increase in enzyme activity but mRNA increased 2.4-fold. Organ culture was used to measure changes in enzyme biosynthesis. There was a 5- to 6-fold increase in the biosynthesis of angiotensin-converting enzyme in the proximal intestine 24 h after the switch to the gelatin diet and a 1.6-fold increase in mRNA levels. No change in biosynthesis was observed in the distal small intestine despite an increase in mRNA. These results support the conclusion that rapid dietary induction of intestinal angiotensin-converting enzyme is differentially regulated in proximal and distal segments of the small intestine. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|