講師 古山 敬祐

KOYAMA Keisuke

所属:

学位 博士(獣医学)
最終学歴 北海道大学大学院獣医学研究科博士課程獣医学専攻 単位取得退学
専門分野 獣医臨床繁殖学
学部担当授業科目 獣医繁殖学A 獣医繁殖学B 獣医繁殖学実習 他
大学院担当授業科目 先端病態解析学特別講義C
オフィスアワー 月曜日(12:00〜13:00)<りんくう・C405>
メールアドレス koyama-keisuke @ vet.osakafu-u.ac.jp
ウェブサイト http://www.vet.osakafu-u.ac.jp/reprod/

https://researchmap.jp/inazo0211

研究紹介

産業動物(主にウシ)の繁殖性向上および体外成熟卵子の受胎性向上を目指して、周産期管理法および体外培養法の研究を行っています。

キーワード 乳牛、センシング、卵巣予備能、性選別精液、繁殖生理、ルーメンバイパスアミノ酸 

 

主な著書・論文

  1. Hirayama H, Sakumoto R, Koyama K, Yasuhara T, Hasegawa T, Inaba R, Fujii T, Naito A, Moriyasu S, Kageyama S. 2019. Expression of C-C motif chemokines and their receptors in bovine placentomes at spontaneous and induced parturition. J Reprod Dev. 66: (49-55).
  2. Yasuhara T, Koyama K, Sakumoto R, Fujii T, Naito A, Moriyasu S, Kageyama S, Hirayama H. 2019. Enhanced glucocorticoid exposure facilitates the expression of genes involved in prostaglandin and estrogen syntheses in bovine placentomes at induced parturition. Theriogenology. 139: (1-7).
  3. Koyama K, Koyama T, Sugimoto M, Kusakari N, Miura R, Yoshioka K, Hirako M. 2018. Prediction of calving time in Holstein dairy cows by monitoring the ventral tail base surface temperature. Vet J. 240: (1-5).
  4. Koyama K, Koyama T, Sugimoto M. 2018. Repeatability of antral follicle count according parity in dairy cows. J Reprod Dev. 64: (535-539).
  5. Koyama T, Omori R, Koyama K, Matsui Y, Sugimoto M. 2018. Optimization of diagnostic methods and criteria of endometritis for various postpartum days to evaluate infertility in dairy cows. Theriogenology. 119: (225-232).
  6. Kunii H, Koyama K, Ito T, Suzuki T, Balboula AZ, Shirozu T, et al. 2018. Hot topic: Pregnancy-induced expression of interferon-stimulated genes in the cervical and vaginal mucosal membranes. J Dairy Sci. 101: (8396-8400).
  7. Koyama K, Koyama T, Matsui Y, Sugimoto M, Kusakari N, Osaka I, et al. 2017. Characteristics of dairy cows with a pronounced reduction in first milk yield after estrus onset. Jpn J Vet Res. 65: (55-63).
  8. Higaki S, Kishi M, Koyama K, Nagano M, Katagiri S, Takada T, et al. 2017. Early germinal vesicle breakdown is a predictor of high preimplantation developmental competent oocytes in mice. Zygote. 25: (41-48).
  9. Hirayama H, Koyama K, Sawai K, Fujii T, Naito A, Fukuda S, Kageyama S. 2015. Localization of TGF-β and TGF-β receptor in bovine term placentome and expression differences between spontaneous and induced parturition. Placenta. 36: (1239-1245).
  10. Kang SS, Ofuji S, Imai K, Huang W, Koyama K, Yanagawa Y, Takahashi Y, Nagano M. 2015. The efficacy of the well of the well (WOW) culture system on development of bovine embryos in a small group and the effect of number of adjacent embryos on their development. Zygote. 23: (412-415).
  11. Kang SS, Koyama K, Huang W, Yang Y, Yanagawa Y, Takahashi Y, Nagano M. 2015. Addition of D-penicillamine, hypotaurine, and epinephrine (PHE) mixture to IVF medium maintains motility and longevity of bovine sperm and enhances stable production of blastocysts in vitro. J Reprod Dev. 61: (99-105).
  12. Tulake K, Yanagawa Y, Takahashi Y, Katagiri S, Higaki S, Koyama K, et al. 2014. Effects of ovarian storage condition on in vitro maturation of Hokkaido sika deer (Cervus nippon yesoensis) oocytes. Jpn J Vet Res. 62: (187-192).
  13. Hirayama H, Moriyasu S, Kageyama S, Sawai K, Takahashi H, Geshi M, et al. 2014. Enhancement of maternal recognition of pregnancy with parthenogenetic embryos in bovine embryo transfer. Theriogenology. 81: (1108-1115).
  14. Koyama K, Kang S-S, Huang W, Yanagawa Y, Takahashi Y, Nagano M. 2014. Estimation of the Optimal Timing of Fertilization for Embryo Development of In Vitro-Matured Bovine Oocytes Based on the Times of Nuclear Maturation and Sperm Penetration. J Vet Med Sci. 76: (653-659).
  15. Koyama K, Kang S-S, Huang W, Yanagawa Y, Takahashi Y, Nagano M. 2014. Aging-related Changes in In Vitro-matured Bovine Oocytes: Oxidative Stress, Mitochondrial Activity and ATP Content After Nuclear Maturation. J Reprod Dev. 60: (136-142).
  16. Nagano M, Kang SS, Koyama K, Huang W, Yanagawa Y, Takahashi Y. 2013. In vitro maturation system for individual culture of bovine oocytes using micro-volume multi-well plate. Jpn J Vet Res. 61: (149-154).

 

所属学会(役員、委員等)

  1. 日本獣医師会
  2. 日本繁殖生物学会
  3. 日本獣医学会
  4. 日本畜産学会
  5. 日本胚移植研究会

受賞歴

  1. 北海道家畜人工授精師協会スライド賞(2013)
  2. 北海道家畜人工授精師協会統計処理賞(2014)
  3. 北海道獣医師会北海道獣医師会長賞(2018)
  4. 北海道家畜人工授精師協会優良賞(2018)