Demonstration of benzodiazepine-like molecules in the mammalian brain with a monoclonal antibody to benzodiazepines.
AUTOR(ES)
Sangameswaran, L
RESUMO
An anti-benzodiazepine monoclonal antibody has been used to demonstrate the existence of benzodiazepine-like molecules in the brain. Immunocytochemical experiments show that these molecules are neuronal and not glial and that they are ubiquitously distributed throughout the brain. Immunoblots indicate the presence of benzodiazepine-like epitopes in several brain peptides. Small benzodiazepine-like molecules were isolated from the brain soluble fraction by immunoaffinity chromatography. They block the binding of agonists, inverse agonists, and antagonists to the neuronal-type benzodiazepine receptor. The neurotransmitter gamma-aminobutyric acid increases the affinity of the benzodiazepine receptor for the purified endogenous molecules. The results indicate that the immunoaffinity-purified molecules behave like the neuronal-type benzodiazepine receptor agonists. The purified molecules, however, do not inhibit the binding of tritiated Ro 5-4864 to the "peripheral-type" benzodiazepine receptor. The results demonstrate the existence of benzodiazepine-like molecules in the brain that bind to the benzodiazepine receptor. These molecules are different from the endogenous benzodiazepine receptor ligands reported by others.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=391162Documentos Relacionados
- Purification of a benzodiazepine from bovine brain and detection of benzodiazepine-like immunoreactivity in human brain.
- Different GABAA receptor subtypes mediate the anxiolytic, abuse-related, and motor effects of benzodiazepine-like drugs in primates
- Toxic "ictal" confusion in middle age: treatment with benzodiazepines.
- Differentiation of Friend erythroleukemia cells induced by benzodiazepines.
- Inhibition of Ca2+ conductance in identified leech neurons by benzodiazepines.
