業績

  1. Matsumoto, Y., Kowata, N., Kikuyama, S., Okada, R.*, 2024. Analyses of mRNA expression levels of pituitary hormones, their hypothalamic regulating factors, and receptors involved in metamorphosis with special reference to the summer and winter seasons. Zool. Sci. 41, 32–38.
  2. Hibino, M., Aoki, R., Ha, D.A., Sano, H., Yamashita, S., Ogasawara, H., Nishio, K., Kotake, K., Mamun, M.M.U., Okada, R., Shibata, Y., Suzuki, M., 2024. Ontogenetic expression of aquaporins in the kidney and urinary bladder of the Japanese tree Frog, Dryophytes japonicus. Zool. Sci. 41, 124–131.
  3. Kikuyama, S., Yamamoto, K., Toyoda, F., Kouki, T., Okada., R.*, 2023. Hormonal and pheromonal studies on amphibians with special reference to metamorphosis and reproductive behavior. Develop. Growth Differ. 65, 321–336.
  4. Okada, R.*, Adachi, S., Takiya, Y., Iwasaki, R., Hirota, A., Kikuyama, S., 2022. Involvement of glucose in freeze tolerance in the Japanese tree frog Hyla japonica. Develop. Growth Differ. 2022, 64, 1–8
  5. Kikuyama, S., Hasunuma, I., Okada, R.*, 2021. Development of the hypothalamo–hypophyseal system in amphibians with special reference to metamorphosis. Mol. Cell Endocrinol. 524, 111143.
  6. Kikuyama, S.*, Okada, R.*, Hasunuma, I., Nakada, T., 2019. Some aspects of the hypothalamic and pituitary development, metamorphosis, and reproductive behavior as studied in amphibians. Gen. Comp. Endocrinol. 284, 113212.
  7. Okada, R.*, Suzuki, M., Ito, N., Hyodo, S., Kikuyama, S., 2019. A novel type of prolactin expressed in the bullfrog pituitary specifically during the larval period. Gen. Comp. Endocrionol. 276, 77–85.
  8. Imamichi, Y., Sekiguchi, T., Kitano, T., Kajitani, T., Okada, R., Inaoka, Y., Miyamoto, K., Uwada, J., Takahashi, S., Nemoto, T., Mano, A., Khan M.R.I., Islam, M.T., Yuhki, K.I., Kashiwagi, H., Ushikubi, F., Suzuki, N., Taniguchi, T., Yazawa, T*, 2017. Diethylstilbestrol administration inhibits theca cell androgen and granulosa cell estrogen production in immature rat ovary. Sci. Rep. 7, 8374.
  9. Okada, R.*, Yamamoto, K., Hasunuma, I., Asahina, J., Kikuyama, S., 2016. Arginine vasotocin is the major adrenocorticotropic hormone-releasing factor in the bullfrog Rana catesbeiana. Gen. Comp. Endocrinol. 237, 121–130.
  10. 岡田令子*、鈴木賢一*　 両生類の変態：分子から個体レベルの制御. 生物科学（日本生物科学者協会編集）, 農文協. 67, 146–153.
  11. 岡田令子*　 両生類における下垂体ホルモン放出因子の役割の特異性とその意義, 比較内分泌学，日本比較内分泌学会，42, 60–61.
  12. Tamaoki, K., Okada, R., Ishihara, A., Shiojiri, N., Mochizuki, K., Goda, T., Yamauchi, K.*, 2016. Morphological, biochemical, transcriptional and epigenetic responses to fasting and refeeding in intestine of Xenopus laevis. Cell Biosci. 6:2. doi: 10.1186/s13578-016-0067-9.
  13. Hirota, A., Takiya, Y., Sakamoto, J., Shiojiri, N., Suzuki, M., Tanaka, S., Okada, R.*, 2015. Molecular cloning of cDNA encoding an aquaglyceroporin, AQP-h9, in the Japanese tree frog, Hyla japonica: possible roles of AQP-h9 as a glycerol transporter in freeze tolerance. Zool. Sci. 32, 296–306.
  14. Shibata, Y., Katayama, I., Nakakura, T., Ogushi, Y., Okada, R., Tanaka, S., Suzuki, M.*, 2015. Molecular and cellular characterization of urinary bladder-type aquaporin in Xenopus laevis. Comp. Endocrinol. 222, 11­19.
  15. Suzuki, M.*, Shibata, Y., Ogushi, Y., Okada, R., 2015. Molecular machinery for vasotocin-dependent transepithelial water movement in amphibians: aquaporins and evolution. Biol. Bull. 229, 109–119.
  16. Shibata, Y., Sano, T., Tsuchiya, N., Okada, R., Mochida, H., Tanaka, S., Suzuki, M.*, 2014. Gene expression and localization of two types of AQP5 in Xenopus tropicalis under hydration and dehydration. Am. J. Physiol. Regul. Integr. Comp. Physiol. 307, R44-56.
  17. Saitoh, Y., Ogushi, Y., Shibata, Y., Okada, R., Tanaka, S., Suzuki, M.*, 2014. Novel vasotocin-regulated aquaporins expressed in the ventral skin of semigaquatic anuran amphibians: evolution of cutaneous water-absorbing mechanisms. Endocrinology, 155, 2166–2177.
  18. Tanaka, S.*, Nakakura, T., Jansen, E.J., Unno, K., Okada, R., Suzuki, M., Martens, G.J.M., Kikuyama, S.*, 2013. Angiogenesis in the intermediate lobe of the pituitary gland alters its structure and function. Gen. Comp. Endocrinol. 185, 10–18.
  19. Hasunuma, H.*, Toyoda, F., Okada, R., Yamamoto, K., Kadono, Y., and Kikuyama S., 2013. Roles of arginine vasotocin receptors in the brain and pituitary of submammalian vertebrates. International review of cell and molecular biology. 304, 191–225.
  20. Morimoto, N., Hashimoto, K., Okada, R., Mochida, H., Uchiyama, M., Kikuyama, S., Matsuda, K.*, 2011. Inhibitory effect of corticotropin-releasing factor on food intake in the bullfrog, Aquarana catesbeiana. Peptides 32, 1872–1875.
  21. Yazawa, T., Kawabe, S., Inaoka, Y., Okada, R., Mizutani, T., Imamichi, Y., Ju, Y., Yamazaki, Y., Usami, Y., Kuribayashi, M., Umezawa, A., Miyamoto, K.*, 2010. Differentiation of mesenchymal stem cells and embryonic stem cells into steroidogenic cells using steroidogenic factor-1 and liver receptor homolog-1. Mol. Cell Endocrinol. 336, 127–132.
  22. Ogushi, Y., Tshuzuki, A., Sato, M., Mochida, H., Okada, R., Suzuki, M., Hillyard S.D., Tanaka, S.*, 2010. The water-absorption region of ventral skin of several semiterrestrial and aquatic anuran amphibians identified by aquaporins. Am. J. Physiol. Regul. Integr. Comp. Physiol. 299, 1150–1162.
  23. Yazawa, T., Inaoka, Y., Okada, R., Mizutani, T., Yamazaki, Y., Usami, Y., Kuribayashi, M., Orisaka, M., Umezawa, A., Miyamoto, K.*, 2010. PPAR-gamma coactivator-1alpha regulates progesterone production in ovarian granulosa cells with SF-1 and LRH-1. Mol. 24, 485–496.
  24. Nakano, M., Minagawa, A., Hasunuma, I., Okada, R., Tonon, M. C., Vaudry, H., Yamamoto, K., Kikuyama, S., Machida, T., Kobayashi, T.*, 2010. D2 Dopamine receptor subtype mediates the inhibitory effect of dopamine on TRH-induced prolactin release from the bullfrog pituitary. Gen. Comp. 168, 287–292.
  25. Nakano, M., Hasunuma, I., Okada, R., Yamamoto, K., Kikuyama, S., Machida, T., Kobayashi, T.*, 2010. Molecular cloning of bullfrog D2 dopamine receptor cDNA: Tissue distribution of three isoforms of D2 dopamine receptor mRNA. Gen. Comp. 168, 143–148.
  26. Matsuda, K.*, Morimoto, N., Hashimoto, K., Okada, R., Mochida, H., Uchiyama, M., Kikuyama, S., 2010. Changes in the distribution of corticotropin-releasing factor (CRF)-like immunoreactivity in the larval bullfrog brain and the involvement of CRF in the cessation of food intake during metamorphosis. Gen. Comp. 168, 280–286.
  27. Okada, R.*, Kobayashi, T., Yamamoto, K., Nakakura, T., Tanaka, S., Vaudry, H., Kikuyama, S., 2009. Neuroendocrine regulation of thyroid-stimulating hormone secretion in amphibians. Ann. N. Y. Acad. 1163, 262–27

*Corresponding author