Summary
A pharmaco-histochemical regimen was used to examine the morphology and internal organization of acetylcholinesterase (AChE, EC 3.1.1.7) neurons in brain areas—the caudate-putamen nucleus, nucleus accumbens, olfactory tubercule, and substantia nigra—monoaminergically characterized in terms of their dopamine content. Intense, homogenous staining is produced in these neural regions by other histochemical protocols for AChE; individual AChE-containing neurons cannot be observed reliably or consistently. With the present technique, based on the differential regeneration of AChE in the separate subcellular compartments of the neuron (i.e., axon, dendrite, soma) after intramuscular injection ofbis-(1-methylethyl)-phosphorofluoridate (di-isopropylfluorophosphate: DFP), it was shown that AChE was associated with neurons whose cell bodies lay within the brain areas studied. Although the significance of dopaminergic-cholinergic relationships in the caudate-putamen complex, nucleus accumbens, and olfactory tubercule could not be established on the basis of these new histochemical data, arguments were presented indicating that dopamine neurons in the zona compacta of the substantia nigra also contained AChE.
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Butcher, L.L., Talbot, K. & Bilezikjian, L. Acetylcholinesterase neurons in dopamine-containing regions of the brain. J. Neural Transmission 37, 127–153 (1975). https://doi.org/10.1007/BF01663629
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DOI: https://doi.org/10.1007/BF01663629