Immunohistochemical evidence for different pathways immunoreactive to substance P and calcitonin gene-related peptide (CGRP) in the guinea-pig stellate ganglion
The colocalization of immunoreactivities to substance P and calcitonin gene-related peptide (CGRP) in nervous structures and their correlation with other peptidergic structures were studied in the stellate ganglion of the guinea pig by the application of double-labelling immunofluorescence. Three ty...
Gespeichert in:
| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 1993
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| In: |
Cell & tissue research
Year: 1993, Jahrgang: 272, Heft: 3, Pages: 563-574 |
| ISSN: | 1432-0878 |
| DOI: | 10.1007/BF00318563 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/BF00318563
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| Verfasserangaben: | Christine Heym, Nengbao Liu, Andrea Gleich, Peter Oberst, Wolfgang Kummer |
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| 245 | 1 | 0 | |a Immunohistochemical evidence for different pathways immunoreactive to substance P and calcitonin gene-related peptide (CGRP) in the guinea-pig stellate ganglion |c Christine Heym, Nengbao Liu, Andrea Gleich, Peter Oberst, Wolfgang Kummer |
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| 520 | |a The colocalization of immunoreactivities to substance P and calcitonin gene-related peptide (CGRP) in nervous structures and their correlation with other peptidergic structures were studied in the stellate ganglion of the guinea pig by the application of double-labelling immunofluorescence. Three types of fibre were distinguished. (1) Substance P+/CGRP+ fibres, which sometimes displayed additional immunoreactivity for enkephalin, constituted a small fibre population of sensory origin, as deduced from retrograde labelling of substance P+/CGRP+ dorsal root ganglion cells. (2) Substance P+/CGRP− fibres were more frequent; some formed baskets around non-catecholaminergic perikarya that were immunoreactive to vasoactive intestinal polypeptide (VIP). (3) CGRP+/substance P− fibres were most frequent and were mainly distributed among tyrosine hydroxylase (TH)-immunoreactive cell bodies. The peptide content of fibre populations (2) and (3) did not correspond to that of sensory ganglion cells retrogradely labelled by tracer injection into the stellate ganglion. Therefore, these fibres are throught to arise from retrogradely labelled preganglionic sympathetic neurons of the spinal cord, in which transmitter levels may have been too low for immunohistochemical detection of substance P or CGRP. CGRP-immunoreactivity but no substance P-immunolabelling was observed in VIP-immunoreactive postganglionic neurons. Such cell bodies were TH-negative and were spared by substance P-immunolabelled fibre baskets. Retrograde tracing with Fast Blue indicated that the sweat glands in the glabrous skin of the forepaw were the targets of these neurons. The streptavidin-biotin-peroxidase method at the electron-microscope level demonstrated that immunoreactivity to substance P and CGRP was present in dense-cored vesicles of 50-130 nm diameter in varicosities of non-myelinated nerve fibres in the stellate ganglion. No statistically significant difference in size was observed between vesicles immunolabelled for substance P and CGRP. Immunoreactive varicosities formed axodendritic and axosomatic synaptic contacts, and unspecialized appositions to non-reactive neuronal dendrites, somata, and axon terminals. Many varicosities were partly exposed to the interstitial space. The findings provide evidence for different pathways utilizing substance P and/or CGRP in the guinea-pig stellate ganglion. | ||
| 650 | 4 | |a Calcitonin gene-related peptide (CGRP) | |
| 650 | 4 | |a Guinea pig | |
| 650 | 4 | |a Immunocytochemistry | |
| 650 | 4 | |a Stellate ganglion | |
| 650 | 4 | |a Substance P | |
| 700 | 1 | |a Liu, Nengbao |e VerfasserIn |4 aut | |
| 700 | 1 | |a Gleich, Andrea |e VerfasserIn |0 (DE-588)1380930200 |0 (DE-627)1940501687 |4 aut | |
| 700 | 1 | |a Oberst, Peter |d 1961- |e VerfasserIn |0 (DE-588)124767141 |0 (DE-627)365931616 |0 (DE-576)294490965 |4 aut | |
| 700 | 1 | |a Kummer, Wolfgang |d 1958- |e VerfasserIn |0 (DE-588)1058917870 |0 (DE-627)797794603 |0 (DE-576)41499308X |4 aut | |
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