Effect of clonidine on Mood pressure and GABAergic mechanisms us spontaneously hypertensive rats
| Autor: | Małgorzata Remiszewska, Zenon Jastrzȩbski, Halina Czyżewska-Szafran, Maria Wutkiewicz |
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| Rok vydání: | 1991 |
| Předmět: |
Male
medicine.medical_specialty Statistics as Topic Glutamate decarboxylase Hypothalamus Blood Pressure Stimulation Hippocampus Clonidine gamma-Aminobutyric acid Heart Rate Rats Inbred SHR Internal medicine medicine Animals gamma-Aminobutyric Acid Pharmacology Glutamate Decarboxylase business.industry Brain Receptors GABA-A Rats Spectrometry Fluorescence Blood pressure Endocrinology nervous system Mechanism of action Hypertension GABAergic medicine.symptom business medicine.drug |
| Zdroj: | European Journal of Pharmacology. 198:115-120 |
| ISSN: | 0014-2999 |
| DOI: | 10.1016/0014-2999(91)90609-t |
| Popis: | The action of clonidine on blood pressure and on the functional state of the gamma-aminobutyric acid-ergic (GABAergic) system was studied. A single injection of clonidine (1, 5, 10, 20 micrograms.kg-1) induced a dose-dependent decrease of blood pressure. Chronic administration of clonidine, 10 micrograms.kg-1, produced the maximum effect after the third injection. The effect was maintained for the duration of the study. Single or chronic clonidine injections, at the dose of 10 micrograms.kg-1 enhanced the GABA content in the brain and hypothalamus. This effect was less pronounced in the hippocampus. The drug administered according to the same regimen stimulated glutamic acid decarboxylase activity only in the hypothalamus. Clonidine caused a marked enhancement of specific [3H]GABA binding in the hypothalamus. These data suggest that the hypotensive action of clonidine is related to stimulation of the GABAergic system. |
| Databáze: | OpenAIRE |
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