Immunoreactive Insulin-Like Growth Factor in Plasma during Pre- and Post-Partum Periods of Thoroughbred Mares from which the Newborn were Removed: its Pattern, Physiological Function and Relation to Other Hormones

• DERAR Refaat I.

  Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University Laboratory of Theriogenology, Faculty of Agriculture, Iwate University

• HARAMAKI Shigeyuki

  Shadai Farm

• HOQUE Shafiqul M.D.

  Laboratory of Theriogenology, Faculty of Agriculture, Iwate University Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University Department of Medicine and Surgery, Sylhet Govt. Veterinary College

• HASHIZUME Tsutomu

  Laboratory of Animal Breeding and Reproduction, Faculty of Agriculture, Iwate University

• OSAWA Takeshi

  Laboratory of Theriogenology, Faculty of Agriculture, Iwate University Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University

• TAYA Kazuyoshi

  Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology

• WATANABE Gen

  Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology

• MIYAKE Yoh-Ichi

  Laboratory of Theriogenology, Faculty of Agriculture, Iwate University Clinical Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University Laboratory of Theriogenology, Obihiro University of Agriculture and Veterinary Medicine

抄録

Plasma concentrations of immunoreactive (ir-) insulin-like growth factor I (IGF-I) were measured in 9 pregnant mares from 30 days before foaling to Day 7 after ovulation of the first post-partum estrus (foal heat) in order to characterize its pattern and investigate its possible role in mares during that time. A marked increase in plasma concentrations of ir-IGF-I was observed during the last month of pregnancy. After foaling, ir-IGF-I sustained its high concentration for the first week after parturition and it gradually decreased thereafter. Throughout the observation period of the current study, a significant positive correlation between ir-IGF-I and FSH (r=0.58, p<0.05) was found. The significant increase in ir-IGF-I and FSH shortly prior to parturition may be responsible for the rapid resumption of ovarian activity in mares and the initiation of foal heat in thoroughbred mares. Statistically significant positive correlation between ir-IGF-I, FSH and ir-inhibin levels observed in the current study confirm the previous suggestion that ir-inhibin secreted during late pregnancy in mares may be biologically inactive.<br>

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　Ｅｑｕｉｎｅ　Ｓｃｉｅｎｃｅ

  Ｊｏｕｒｎａｌ　ｏｆ　Ｅｑｕｉｎｅ　Ｓｃｉｅｎｃｅ 17 (3), 75-79, 2006

  日本ウマ科学会

キーワード

• foal heat
• IGF-I
• ir-inhibin
• mares
• pregnancy

詳細情報

• CRID: 1390001204369716224
• NII論文ID: 10018777352
• NII書誌ID: AA11010806
• DOI: 10.1294/jes.17.75
• ISSN: 13477501
• ISSN: 13403516
• NDL書誌ID: 8527854
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8527854
• Web Site: http://www.jstage.jst.go.jp/article/jes/17/3/17_3_75/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2007022843
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可