Galanin-Containing Nerve Nets in Hydra (Hydra japonica) and Freshwater Medusa (Craspedacusta sowerbyi)
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概要
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Immunohistochemical analyses were performed to determine the distribution of galanin-like immunoreactivity in the hydra (Hydra japonica) and freshwater medusa (Craspedacusta sowerbyi). In the hydra, galanin-immunoreactive (Gal-IR) fibers were restricted in the tentacle and basal disk. Although Gal-IR somata were obscure, swollen parts were seen along the course of Gal-IR fibers. In the medusa, galanin-like immunoreactivity was restricted to the subumbrella. Bipolar and multipolar Gal-IR somata and fibers formed a circular nerve net in the subumbrella and Gal-IR fibers projected to the lateral edge of the subumbrella from this Gal-IR circular nerve net. The presence of galanin-like immunoreactivity in these most primitive animals with a nervous system suggested that galanin is an one of the phylogenetically oldest neuropeptides in addition to other neuropeptides such as FMRF amide and substance P.
- 神奈川歯科大学の論文
- 2000-03-31
著者
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Yamamoto Toshiharu
Department Of Anatomy Shiga University Of Medical Science
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Yamamoto Toshiharu
Department Of Biology Kanagawa Dental College
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Suzuki Hirohumi
Department Of Biology Fukuoka University Of Education
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Suzuki Hirohumi
Department Of Biology Faculty Of Science Toho University
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