| Neuroendocrine regulation of structure and function in the endostyle of amphioxus, Branchiostoma belcheri |
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| 作者姓名： | FANG Yongqiang WENG Youzhu |
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| 作者单位： | Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China,Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant No.30070106) |
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| 摘 要： | Using histological and histochemical methods the structure of the endostyle in amphioxus at different gonadal developmental stages is studied, and the immunocytochemical localization of thyroglobulin (Tg) and thyrotropin (TSH) in the endostyle, Hatschek's pit and brain vesicle is investigated. The results not only confirm the previous report that the endostyle is composed of 6 zones and the cells of zone 5 are thyroid hormone synthesizing cells, but also find the thyroxine synthesis in and secretion from zone 3. In addition, the epithelial cells in Hatschek's pit and the neural cells in brain vesicle are immunopositive for TSH, and the immunoactivity is correlated with gonadal cycle. The present study may provide morphological proof for the hypothesis that the secretory activity of thyroid cells is regulated by TSH from Hatschek's pit and brain vesicle.
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| 关 键 词： | Branchiostoma belcheri endostyle thyroglobulin immunocytochemistry thyrotropin |
Neuroendocrine regulation of structure and function in the endostyle of amphioxus, Branchiostoma belcheri |
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| FANG Yongqiang,WENG Youzhu.Neuroendocrine regulation of structure and function in the endostyle of amphioxus, Branchiostoma belcheri[J].Progress in Natural Science,2002,12(12):904-908. |
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| Authors: | FANG Yongqiang WENG Youzhu |
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| Institution: | Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | Using histological and histochemical methods the structure of the endostyle in amphioxus at different gonadal developmental stages is studied, and the immunocytochemical localization of thyroglobulin (Tg) and thyrotropin (TSH) in the endostyle, Hatschek's pit and brain vesicle is investigated. The results not only confirm the previous report that the endostyle is composed of 6 zones and the cells of zone 5 are thyroid hormone synthesizing cells, but also find the thyroxine synthesis in and secretion from zone 3. In addition, the epithelial cells in Hatschek's pit and the neural cells in brain vesicle are immunopositive for TSH, and the immunoactivity is correlated with gonadal cycle. The present study may provide morphological proof for the hypothesis that the secretory activity of thyroid cells is regulated by TSH from Hatschek's pit and brain vesicle. |
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| Keywords: | Branchiostoma belcheri endostyle thyroglobulin immunocytochemistry thyrotropin |
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