IGF-Iによる妊娠早期のサラブレッド雌馬の卵胞発育促進

DOI 日本農学文献記事索引 Web Site Web Site PubMed 被引用文献1件 参考文献33件
  • DERAR Refaat
    Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University Laboratory of Theriogenology, Faculty of Agriculture, Iwate University
  • HARAMAKI Shigeyuki
    Shadai Corporation, Shiraoi Farm
  • HOQUE MD. Shafiqul
    Laboratory of Theriogenology, Faculty of Agriculture, Iwate University Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
  • HASHIZUME Tsutomu
    Laboratory of Animal Production, Faculty of Agriculture, Iwate University
  • OSAWA Takeshi
    Laboratory of Theriogenology, Faculty of Agriculture, Iwate University
  • TAYA Kazuyoshi
    Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology
  • WATANABE Gen
    Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology
  • MIYAKE Yoh-Ichi
    Laboratory of Theriogenology, Faculty of Agriculture, Iwate University

書誌事項

タイトル別名
  • Insulin-Like Growth Factor-I as a Follicular Growth Promoter during Early Pregnancy in Thoroughbred Mares
  • Insulin-Like Growth Factor-1 as a Follicular Growth Promoter during Early Pregnancy in Thoroughbred Mares

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抄録

To elucidate the physiological role of insulin-like growth factor-I (IGF-I) during early pregnancy in mares, number of ovarian follicles was monitored ultrasonically during different stages of the first trimester of pregnancy in 36 thoroughbred mares. From 9 of 36 mares, blood samples were collected weekly from the mating day till the end of the first trimester of pregnancy and plasma IGF-I profiles were examined with other hormones, like follicle stimulating hormone (FSH), luteinizing hormone (LH), ir-inhibin, progesterone and estradiol-17β. Plasma IGF-I level fluctuated throughout the studied period with four peaks on the 7th, 28th, 49th and 84th days of pregnancy. Plasma IGF-I showed a positive correlation with plasma FSH (P<0.05), whereas no correlation was found with other hormones during the studied period. Plasma IGF-I had no correlation with the foetal size, but positive correlation with the number of large (> 30 mm) and medium (10-30 mm) follicles. These results suggested that IGF-I might produce from the medium and large follicles during early pregnancy and promote to develop their growth via pituitary FSH mediated effects in the mares.<br>

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