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題名 | A Comparative Study of Neuropeptide Y-Immunoreactivity in the Retina of Dolphin and Several Other Mammalian Species=神經胜冴Y在海豚及陸上哺乳類之視網膜之免疫反應研究 |
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作者 | 陳淑姿; 沈清良; 王建平; 周蓮香; | 書刊名 | 動物研究學刊 |
卷期 | 38:4 1999.10[民88.10] |
頁次 | 頁416-422 |
分類號 | 389.7 |
關鍵詞 | 神經胜冴Y; 視網膜; 鯨豚類; NPY; Retina; Cetacean; Immunohistochemistry; |
語文 | 英文(English) |
中文摘要 | 本實驗探討及比較神經胜�� Y(NPY)在鯨豚類及數種陸上哺乳類視網膜的表現情形。結果顯示,具有NPY免疫化學反應性之細胞,在海豚視網膜中主要分布在大型網膜神經節細胞,此種巨大細胞(30∼70μm)在囓齒、食肉與靈長類是不存在的。前人發表之人類及實驗動物(例如大白鼠與貓科動物),含NPY的細胞主要分布在內核細胞群。但是在犬科,我們發現NPY細胞主要為中大型神經節細胞(20∼40μm),而且表現型式較類似鯨豚類。此研究證明,神經胜�顗漱壎泵]動物種類而異,而NPY在海豚視網膜的特殊表現意味著,含NPY之巨大型細胞在其生活環境有其特別的視覺傳導作用。 |
英文摘要 | The immunoreactivity of an antibody to neuropeptide Y (NPY) in the retina of striped (Stenella coeruleoalba) and Fraser (Lagenodelphis hosei) dolphins and several other species was studied and compared. In dolphin retina, moderate to intense immunostaining was observed primarily in the giant retinal ganglion cells and their dendrite-like processes, while ganglion cells with smaller somata were only weakly immunoreactive. In contrast, NPY immunoreactive cell bodies are mainly located in cells with small somata in the ganglion cell layer and cells resembling amacrine cells in the inner nuclear layer in rat retina. Positive immunostaining was also observed in the inner and outer plexiform layers of rat retina, a feature that was not found in dolphin retina. Interestingly, the overall pattern of NPY expression in the retina of dolphin is similar to that in dog but not in rat, or other mammalian species described previously. One possible explanation is that dolphin and dog are more active by day as compared with rat and cat which are considered to be nocturnal. The variable pattern of distribution of NPY observed in different species suggests that NPY plays a unique functional role, for instance, in the demand for higher levels of blood supply for visual connections through the influence of NPY, in the retinal system in a species-dependent manner probably related to animals' visual behaviors and environments. |
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