Indoleamines and the eccentric cells of the limulus lateral eye.

Cell and Tissue Research
A R Adolph, B Ehinger

Abstract

The lateral eye of the horseshoe crab, Limulus polyphemus, was studied by fluorescence microscopy according to Falck and Hillarp and microspectrofluorometry for identifying neuronal monoamines. After the formaldehyde treatment, the eccentric cells and their axons have a yellowish, rapidly fading fluorescence, such as is seen with 5-hydroxytryptamine. The microspectrofluorometric analysis was compatible with the fluorescence being caused by an indole, which could not be definitely identified, however. The eccentric cells have the ability to accumulate indoleamines such as 5-hydroxytryptamine, 6-hydroxytryptamine and 5,6-dihydroxytryptamine. Their axons were best demonstrated after being loaded with 6-hydroxytryptamine. Characteristic varicose terminals were seen in the neuropil, often arranged in clusters. Other terminals, possibly originating from the eccentric cells, were also seen among the pigment cells in the basal part of the ommatidia.

Citations

Jan 1, 1982·Comparative Biochemistry and Physiology. C: Comparative Pharmacology·R J Walker, C J Roberts
Apr 1, 1976·The Journal of General Physiology·A R Adolph
Nov 1, 1979·The Journal of General Physiology·A R Adolph, L Kass
Aug 22, 1985·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·W H Fahrenbach
Mar 22, 1991·The Journal of Comparative Neurology·B A BattelleA E Stuart
Jan 1, 1984·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·R J Walker
Jul 1, 1982·The Journal of Comparative Neurology·S C Chamberlain, G A Engbretson

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