ニホンイモリCynops pyrrhogasterの主嗅覚系と鋤鼻嗅覚系におけるニューロフィラメント200(NF200)様免疫組織化学的反応性の相違に関する研究

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  • SOETA Satoshi
    Department of Veterinary Anatomy, Nippon Veterinary and Animal Science University
  • IZU Yayoi
    Department of Veterinary Anatomy, Nippon Veterinary and Animal Science University
  • SAITO Toru R.
    Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University
  • YAMANO Shuji
    Department of Veterinary Anatomy, Nippon Veterinary and Animal Science University
  • TANIGUCHI Kazuyuki
    Laboratory of Veterinary Anatomy, Faculty of Agriculture, Iwate University

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タイトル別名
  • Differential Expression of Neurofilament 200-Like Immunoreactivity in the Main Olfactory and Vomeronasal Systems of the Japanese Newt, Cynops pyrrhogaster

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説明

Expression of neurofilament 200 (NF200)-like immunoreactivity was examined in the main olfactory system and the vomeronasal system of the Japanese newt, Cynops pyrrhogaster, using anti-porcine NF200 monoclonal antibody (clone N52) to investigate the differences in phenotypical characteristics between these systems. The entire nasal cavity was a flattened single chamber consisting of the main nasal chamber (MNC) and the lateral nasal sinus (LNS) communicating with each other. The olfactory epithelium (OE) was present in the MNC, and the vomeronasal epithelium (VNE) was in the LNS. The OE possessed only a small number of NF200-like immunoreactive receptor neurons. The olfactory nerve and the olfactory nerve layer of the main olfactory bulb also contained a small number of NF200-like immunoreactive axons. In contrast, the VNE possessed many NF200-like immunoreactive receptor neurons. The vomeronasal nerve and the vomeronasal nerve layer of the accessory olfactory bulb contained many NF200-like immunoreactive axons. These findings in the Japanese newt indicate that NF200-like immunoreactive receptor neurons constitute a major subpopulation in the VNE and a minor subpopulation in the OE. In addition, NF200-like immunoreactivity seems to be a useful marker to distinguish the vomeronasal system from the other nervous systems including the main olfactory system in the Japanese newt. The localization of a few NF200-like immunoreactive receptor neurons in the OE might indicate that pheromone-sensitive receptor neurons are intermingled in the OE of the Japanese newt.<br>

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