Immunocytochemical localization of endopeptidase-24.11 in the nucleus tractus solitarius of the rat brain
| Autor: | Richard Sanderson, Eve M. Lutz, Francis Mulholland, John M. Stewart, Clark Bublitz, Robert S. Lasher |
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| Rok vydání: | 1990 |
| Předmět: |
medicine.medical_specialty
Baroreceptor Immunocytochemistry Molecular Sequence Data Substance P Biology Synaptic vesicle Immunoenzyme Techniques chemistry.chemical_compound Postsynaptic potential Internal medicine medicine Animals Amino Acid Sequence Organelles Medulla Oblongata General Neuroscience Solitary nucleus Area postrema Endopeptidase Cell biology Rats Endocrinology nervous system chemistry Neprilysin |
| Zdroj: | Neuroscience letters. 117(1-2) |
| ISSN: | 0304-3940 |
| Popis: | Recently, it has been hypothesized that the N-terminal portion of substance P (SP), SP(1–7), which results from the action of endopeptidase 24.11 (EC3.4.24.11), could be involved in mediating the depressor effects of baroreceptor afferent activation via its action on cells in the nucleus tractus solitarius (NTS). In this study, the binding of a monoclonal antibody to endopeptidase 24.11 was examined immunohistochemically at the level of the caudal medulla of the rat brain. By light microscopy, intense immunoreactivity was seen in the NTS, in fibers bordering the area postrema, and in the area postrema itself. After electron microscopy, endopeptidase 24.11-like immunoreactivity was seen to be associated with the cytoskeleton and plasma membrane in axons, dendrites and glial processes. Antigen was also associated with synaptic vesicles and plasma membranes in presynaptic terminals forming mainly axo-dendritic synapses typical of vagal afferent terminals involved in the baroreceptor reflex. Thus, endopeptidase 24.11 appears to be localized at sites where it could effectively process SP prior to its binding to postsynaptic receptors. |
| Databáze: | OpenAIRE |
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