Localization of RFamide-like Immunoreactivity in the Visceral Organs and Peripheral Neurosecretory Cells Related to the Terminal Abdominal Ganglion in the Cricket, Gryllus bimaculatus

概要

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The distribution of RFamide-like immunoreactivity was examined in the terminal abdominal ganglion (TAG)-related peripheral nervous system, and in the visceral tissues of the female cricket, Gryllus bimaculatus. In the TAG , most of the RFamide-like immunoreactive (RFaLI) neurons were bilaterally paired , and were found in the neuromeres of the 7th to the 10/11th segment. The remaining neurons were found in the midline region. These included anterior unpaired neurons, a cluster of neurons in the posterior end , and ventral paired neurons in the 9th segment. Immunocytochemistry combined with Lucifer Yellow back-filling indicated that the immunoreactive paired medial neurons innervated the rectum . In the visceral tissues innervated by the TAG , RFaLI fibers were seen in the oviducts and rectum , while the spermathecal duct and spermatheca did not exhibit any immunoreactivity . In the peripheral nervous system, RFaLI peripheral neurosecretory cells (PNCs) were found on the fifth and seventh segmental nerve roots of the TAG in both sexes. The perikaryon of the PNCs contained several immunoreactive large electron-dense granular vesicles. Intracellular dye injection showed that the PNCs probably form neurohaemal-release sites for RFamide-like peptide. The PNCs did not project any processes into the TAG.
社団法人日本動物学会の論文
1995-12-15