Fine Structure of the Iris Muscle in the Japanese Common Newt, Cynops pyrrhogaster, with Special Reference to Innervation : Cell Biology

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概要

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• The localization and structure of the iridial muscles and associated nerves of the newt (Cynops pyrrhogaster) were examined by electron microscopy with some histochemical studies of catecholamine and acetylcholinesterase. The sphincter muscle, which was composed of pigmented smooth muscle cells, was located circumferentially in the pupillary margin of the iris. Sphincter muscle cells formed occasional close contacts with each other by protruding cellular processes. Numerous gap junctions and desmosomes were observed between anterior and posterior pigment epithelium of the iris, but not between muscle cells. Nerve endings formed varicosities and were composed of agranular vesicles and/or granular vesicles. There was no dilator muscle in this species. Prominent circumferential catecholamine fluorescence was observed in the pupillary margin. Acetyl-cholinesterase positive and negative muscle cells and nerve fibers were found within the sphincter muscle region.

• 社団法人日本動物学会の論文
• 1988-04-15

著者

• Okamoto Mitsumasa

  Department Of Molecular Biology Faculty Of Science Nagoya University

関連論文

• Transgenesis of newt with exogenous gene expression facilitated by satellite 2 repeats
• Fine Structure of the Iris Muscle in the Japanese Common Newt, Cynops pyrrhogaster, with Special Reference to Innervation : Cell Biology

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