Aminergic and Acetylcholinesterase-positive Innervation in the Cerebral Arterial System and Choroid Plexus of the Newt Triturus pyrrhogaster, with Special Reference to the Plexus Innervation

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The pattern of cerebrovascular noradrenergic or adrenergic (NA) and acetylcholinesterase-positive (AChE) innervation in the newt was investigated. The cerebral arterial tree of this urodelan species was dually innervated by both NA and AChE nerves, with a lesser density of the latter type. NA nerves innervating the major cerebral arteries sometimes originated from NA-containing nerve cells intrinsic to these vessel walls. Another finding worthy of attention was that a large number of NA and AChE nerves were concentrated in the microvascular-epithelial regions of the choroid plexuses, especially the venule loop in the most outer part of the lateral and third plexuses, despite a poor supply of these two nerve types along the entire length of the cerebral arterial tree. This and other findings suggest that NA and cholinergic mechanisms are responsible for the microcirculation and transport action within the choroid plexus in the nutrition of the newt brain via the cerebrospinal fluid. In addition, basophil leucocytes emitted a brilliant greenish yellow fluorescence after formaldehyde gas-treatment. From the combination of the standard excitation and emission spectra and the shifting pattern of these two spectra after HCl vapor treatment, it is expected that specific granules of the newt basophil leucocytes contain not only serotonin and/or catecholamines, but also a substantial amount of fluorescent components other than these biogenic amines and histamine.
社団法人日本動物学会の論文
1994-10-15

Aminergic and Acetylcholinesterase-positive Innervation in the Cerebral Arterial System and Choroid Plexus of the Newt Triturus pyrrhogaster, with Special Reference to the Plexus Innervation

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