Induction of oviposition in laying hens using the extract from neurohypophysis of chickens and pituitary gland of African clawed frogs.

DOI Web Site 41 References
  • Takahashi T.
    岐阜大学大学院応用生物科学研究科 日本聴能言語福祉学院 岐阜保健短期大学
  • Nakayama H.
    岐阜大学大学院連合農学研究科
  • Shimoda S.
    岐阜大学大学院応用生物科学研究科
  • Iwasawa A.
    岐阜大学大学院応用生物科学研究科 岐阜大学大学院連合農学研究科
  • Nakagawa-Mizuyachi K.
    グラクソ･スミスクライン株式会社研究本部薬理研究部
  • Murata S.
    第ニグレイスフル春日井
  • Hyodo H.
    岐阜大学大学院医学系研究科
  • Murata K.
    日本聴能言語福祉学院

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Other Title
  • ニワトリの脳下垂体後葉抽出液およびアフリカツメガエルの脳下垂体抽出液によるニワトリの産卵誘起実験
  • ニワトリ ノ ノウカスイタイ コウヨウ チュウシュツエキ オヨビ アフリカツメガエル ノ ノウカスイタイ チュウシュツエキ ニ ヨル ニワトリ ノ サンラン ユウキ ジッケン

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Abstract

<p>The present study attempted to examine the effect of the extracts from chicken neurohypophysis and pituitary glands of African clawed frogs (Xenopus laevis) on oviposition in egg-laying hens. The extract of neurohypophysis derived from head within 10 min after the decapitation (fresh chicken neurohypophysis) was found to induce the oviposition in a dose-dependent manner. The oviposition was induced within 3 min after the injection of only 1/8-diIuted extract from one fresh chicken neurohypophysis. Amount of the oviposition-inducing hormone arginine vasotocin (AVT) in fresh chicken neurohypophysis was measured using the method of radioimmunoassay. The total amount of AVT decreased to half of its starting amount under 4°C during the first day and then did not change for three days. The amount of AVT in frozen chicken neurohypophysis and the amount of AVT in pituitary gland of Xenopus laevis were 50-100-foldlower than the amount of AVT in fresh chicken neurohypophysis, but AVT in the neurohypophysis derived from canned chicken heads was hardly detected. Furthermore, the extracts derived from frozen chicken heads and Xenopus laevis induced the oviposition. The present study suggests that the induction of oviposition in laying hens using the extraction from the neurohypophysis of chickens and the pituitary glaud of Xenopus laevis are usable experiments at school.</p>

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