Summary
The neuropeptide- and catecholamine-synthesizing enzyme content and ultrastructure of the peri-ureteric ganglia of guinea-pigs were investigated. Small numbers of neuronal perikarya were present at frequent intervals forming ganglia close to, and along the entire length of, the ureter. Each of these ganglia was surrounded by a connective tissue capsule, and was located in the peri-ureteric connective tissues. Within each ganglion were typical nerve terminals and varicosities containing small, clear synaptic vesicles or synaptic vesicles with an electron-dense core, or a mixture of the two. In the ganglia, immunoreactivity to tyrosine hydroxylase, dopamine β hydroxylase, neuropeptide tyrosine, or vasoactive intestinal peptide was present in neuronal perikarya; immunoreactivity to substance P or leucine enkephalin was present in nerve terminals and varicosities. Electron-microscopic immunogold studies indicated that there was no coexistence of substance P and enkephalin in the nerve terminals, unlike related ganglia in the pelvis of guinea-pigs.
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Mitchell, B.S., Pardoe, H. & Stauber, V.V. An immunohistochemical and electron microscopic study of the peri-ureteric ganglia of the guinea-pig. Histochem J 25, 509–515 (1993). https://doi.org/10.1007/BF00159287
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DOI: https://doi.org/10.1007/BF00159287