性ホルモン投与がニワトリ尾腺の分泌速度に及ぼす影響

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The purpose of this study is to investigate the effects of sexual hormones on the secretory rate in uropygial glands of cockerels by means of 3H-thymidine autoradiography. To determine cell proliferative activity of uropygial glands in intact cockerels, capons, androgen-treated capons and estrogen-treated capons, the labeling index of basal cells in the secretory tubules of glands was recorded 1 hour after injection of 3H-thymidine. The highest labeling index was found in the androgen-treated capons, whereas the capons showed considerably lower values. The labeling indices of the estrogen-treated capons and intact cockerels surpassed those of capons. These results indicate that androgen markedly increases the rate of cell proliferation. The distribution of cells labeled by 3H-thymidine was examined in the secretory tubules of uropygial gland at various times up to 96 hours after injection. Many of the labeled basal cells of the androgentreated capons were observed in the transitional layer 24 hours after 3H-thymidine injection and the degenerating layer after 48 hours. In the estrogen-treated capons and intact cockerels, however the labeled cells were found in the transitional layer 24 hours after injection and appeared in the degenerating layer after 72 hours. The labeled cells of capons were located in the transitional layer after 48 hours and they were observed in the degenerating layer after 96 hours. These results indicate that androgen causes rapidly the movement of cells in the secretory tubules from the basal layer to the degenerating layer by passing through the transitional layer.
社団法人日本畜産学会の論文

性ホルモン投与がニワトリ尾腺の分泌速度に及ぼす影響

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