Photoperiodic Response of Serotonin- and Galanin-Immunoreactive Neurons of the Paraventricular Organ and Infundibular Nucleus in Japanese Quail, Coturnix coturnix japonica
| Autor: | Tadashi Oishi, Takayoshi Ubuka, Kazuyoshi Ukena, Kazuyoshi Tsutsui, Yuka Haida, Satoshi Tamotsu |
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| Rok vydání: | 2004 |
| Předmět: |
Serotonin
endocrine system medicine.medical_specialty Photoperiod Models Neurological Fluorescent Antibody Technique Galanin Coturnix Gonadotropin-Releasing Hormone biology.animal Internal medicine medicine Animals Neurons Microscopy Confocal biology Arcuate Nucleus of Hypothalamus biology.organism_classification Quail Endocrinology medicine.anatomical_structure Hypothalamus Median eminence Coturnix coturnix Animal Science and Zoology Nucleus hormones hormone substitutes and hormone antagonists Paraventricular Hypothalamic Nucleus Hormone |
| Zdroj: | Zoological Science. 21:575-582 |
| ISSN: | 0289-0003 |
| DOI: | 10.2108/zsj.21.575 |
| Popis: | We investigated the photoperiodic response of serotonin- and galanin (GA)- immunoreactive (ir) cells in the paraventricular organ (PVO) and infundibular nucleus (IF) of the Japanese quail and the interaction of these cells with gonadotropin-releasing hormone (GnRH)-ir neurons in the hypothalamus. Serotonin-ir cells were located in series from the PVO to the IF, and were connected with each other. The number of serotonin-ir cells differed significantly between light and dark phases on the short days (SD), but did not differ between light and dark phases on long days (LD). GA-ir cells were also found in the PVO and IF. The number of GA-ir cells under SD conditions was significantly greater than under LD conditions but did not change diurnally. Both serotonin-ir and GA-ir fibers ran along the GnRH-ir cells in the nucleus commissurae pallii. Serotonin-ir and GA-ir fibers were connected with the GnRH-ir fibers in the external layer of the median eminence (ME). We confirmed that GA-ir fibers were closely associated with serotonin-ir neurons in the PVO and IF. GA-ir neurons have at least 2 routes of regulating GnRH neurons directly, and indirectly via the serotonin-ir cells in the PVO and IF. |
| Databáze: | OpenAIRE |
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