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1.Articles

   26)Sekii, K., Yorimoto, S.,Okamoto, H., Nagao, N., Maezawa, T., Matsui, Y., Yamaguchi, K., Furukawa, R., shigenobu, S., Kobayashi, K.

                “Transcriptomic analysis reveals differences in the regulation of amino acid metabolism in asexual and sexual planarians.”

                Scientific reports, vol.9: 6132 (2019)


    25)Nakagawa, H., Sekii, K., Maezawa, T., Kitamura, M., Miyashita, S., Abukawa, M., Matsumoto, M., Kobayashi, K.

                “A comprehensive comparison of Sex-inducing activity in asexual worms of the planarian Dugesia ryukyuensis: the crucial sex-inducing

                 substance appears to be present in yolk glands in Tricladida.”

                Zoological letters, vol. 4: 14 (2018)

 

    24)Maezawa, T., Sekii, K., Ishikawa, M., Okamoto, H., Kobayashi, K.

                “Reproductive strangies in planarians: Insights gained from the bioassay system for sexual induction in asexual Dugesia ryukyuensis

                 worms, Springer Japan, Reproductive and Developmental Strategies: The Continuity of Life.”(2018)


    23)Kobayashi, K., Maezawa, T., Tanaka, H., Onuki, H., Horiguchi,Y., Hirota, H., Ishida, T., Horiike, K., Agata, Y., Aoki, M., Hoshi, M.,    

                 Matsumoto, M.

                “The identification of ᴅ-tryptophan as a bioactive substance for postembryonic ovarian development in the planarian Dugesia ryukyuensis

                Scientific Reports, vol. 7: 45175 (2017)”  

    22) Okano, D., Ishida, S., Ishiguro, S., Kobayashi, K.

         “Light and electron microscopic studies of the intestinal epithelium in Notoplana humilis (Platyhelminthes, Polycladida):

          the contribution of mesodermal / gastrodermal neoblasts to intestinal regeneration.”

          Cell and Tissue Research, on line (2015)

        21)Maezawa, T., Tanaka, H., Nakagawa, H., Ono, M., Aoki, M., Matsumoto, M., Ishida, T., Horiike, K., Kobayashi, K.

         “Planarian D-amino acid oxidase is involved in ovarian development during sexual induction.”

          Mechanisms of Development, vol. 132: 69-78 (2014)

  20)Kobayashi, K., Nakagawa, H., Maezawa, T., Hoshi, M.

         “Existence of two sexual races in the planarian species switching between asexual and sexual reproduction.”

          Zoological Science, vol. 29: 265-272 (2012)

  19)Nakagawa, H., Ishizu, H., Chinone, A., Kobayashi, K., Matsumoto, M.

          “The Dr-nanos gene is essential for germ cell specification in the planarian Dugesia ryukyuensis.”

          The International Journal of Developmental Biology, vol. 56: 165-171 (2012)

  18)Nakagawa, H., Ishizu, H., Hasegawa, R., Kobayashi, K., Matsumoto, M.

           “Drpiwi-1 is essential for germline cell formation during sexualization of the planarian Dugesia ryukyuensis.”

           Developmental Biology, vol. 361: 167-176 (2012)

  17)Kobayashi, K., Hoshi, M.

     “Sex-inducing effect of a hydrophilic fraction on reproductive switching in the planarian Dugesia ryukyuensis (Seriata, Tricladida).”

     Frontier in Zoology, vol. 8: 23 (2011)

  16)Miyashita, H., Nakagawa, H., Kobayashi, K., Hoshi, M., Matsumoto, M.

     “Effects of 17ß-estradiol and bisphenol A on the formation of reproductive organs in planarian.”

     The Biological Bulletin, vol. 220: 47-56 (2011)

  15)Kobayashi, K., Arioka, S., Hoshi, M., Matsumoto, M

     “Production of asexual and sexual offspring in the triploid sexual planarian Dugesia ryukyuensis.”

     Integrative Zoology, vol. 4: 265-271 (2009)

  14)Kobayashi, K., Hashiguchi, T., Ichikawa, T., Ishino, Y., Hoshi, M., Matsumoto, M.

     “Neoblast-enriched fraction rescues eye formation in eye-defective planarian ‘menashi’ Dugesia ryukyuensis.”

     Development, Growth & Differentiation, vol. 50: 689-696 (2008)

  13)Kobayashi, K., Ishizu, H., Arioka, S., Cabrera, J. P., Hoshi, M., Matsumoto, M.

     “Production of diploid and triploid offspring by inbreeding of the triploid planarian Dugesia ryukyuensis.”

     Chromosoma, vol. 117, 289-296 (2008)

  12)Hase, S., Kashiwagi, E., Kobayashi, K., Hoshi, M., Matsumoto, M.

     “Characterization of novel genes expressed specifically in the sexual organs of the planarian Dugesia ryukyuensis.”

     The International Journal of Developmental Biology, vol. 51: 345-349 (2007)

  11)Ishizuka, H., Maezawa, T., Kawauchi, J., Nodono, H., Hirano, Y., Nishimura, O., Nakagawa, H., Sekii, K., Tasaka, K., Tarui, H., Agata,

                K., Hoshi, M., Kobayashi, K., Sakakibara, Y., Matsumoto, M.

     “The Dugesia ryukyuensis database as a molecular resource for studying switching of the reproductive system.”

     Zoological Science, vol. 24: 31-37 (2007)

  10)Hase, S., Wakamatsu, K., Fujimoto, K., Inaba, A., Kobayashi, K., Matsumoto, M., Hoshi, M., Negishi, S.

     “Characterization of the pigment produced by the planarian, Dugesia ryukyuensis.” (2006)

   9)Sato, Y., Kobayashi, K., Matsumoto, M., Hoshi, M., Negishi, S.

        “Comparative study of eye defective worm 'menashi' and regenerating wild-type in planarian, Dugesia ryukyuensis.”

     Pigment Cell Research, vol. 18: 86-91 (2005)

   8)Hase, S., Kobayashi, K., Koyanagi, R., Hoshi, M., Matsumoto, M.

        “Transcriptional pattern of a novel gene, expressing specifically after the point-of-no-return during sexualization, in planaria.”

     Development Genes and Evolution, vol. 212: 585-592 (2003)

      7)Hoshi, M., Kobayashi, K., Arioka, S., Hase, S., Matsumoto, M.

           “Switch from asexual to sexual reproduction in the planarian Dugesia ryukyuensis.”

           Integrative & Comparative Biology, vol. 43: 242-246 (2003)

   6)Kobayashi, K., Arioka, S., Hoshi, M.

     “Seasonal changes in the sexualization of the planarian Dugesia ryukyuensis.”

     Zoological Science, vol. 19: 1267-1278 (2002)

   5)Kobayashi, K., Arioka, S., Hase, S., Hoshi, M.

     “Signification of the sexualizing substance produced by the sexualized planarians.”

     Zoological Science, vol. 19: 667-672 (2002)

   4)Kobayashi, K., Hoshi, M.

     “Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensi: Change of the fissiparous capacity along

                    with the sexualizing process.”

     Zoological Science, vol. 19: 661-666 (2002)

   3)Sato, K., Sugita, T., Kobayashi, K., Fujita, K., Fujii, T., Matsumoto, Y., Mikami, T., Nishizaki, N., Nishizuka, S., Shojima, K., Suda, M.,   

               Takahashi, G., Himeno, H., Muto, A., Ishida, S.

     “Localization of mitochondrial ribosomal RNA on the chromatoid bodies of marine planarian polyclad embryos.”

     Development, Growth & Differentiation, vol. 43: 107-114 (2001)

   2)Kobayashi, K., Koyanagi, R., Matsumoto, M., Cabrera, J. P., Hoshi, H.

     “Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensis: Bioassay system and basic description

                    of sexualizing process.”

     Zoological Science, vol. 16: 291-298 (1999)

   1)Kobayashi, K., Koyanagi, R., Matsumoto, M., Hoshi, M.

     “Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensis.”

     Invertebrate Reproduction & Development, vol. 36: 153-158 (1999)



2.Invited Lecture / Selected Lecture

    16)Kobayashi, K.

                    “Yolk glands containing a large amount of tryptophan have a set of sex-inducing substances to fully sexualize asexual worms of

                    Dugesia ryukyuensis

                    ISFB Conference and European planarian meeting, Oxford, UK (2015)

    15)Maezawa, T., Tanaka, H., Kobayashi, K.

                    “Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensis: The role of D-amino acid oxidase”

                    46th Annual Meeting for the Japanese Society of Developmental Biologists, Matsue, Japan (2013)

     14) Maezawa, T., Tanaka, H., Kitamura, M., Nakagawa, H., Horiguchi, Y., Honda, S., Hirota, H., Kobayashi, K.

                     “Sex-inducing effects by ‘Feeding’: Switching from asexual to sexual reproduction in the planarian Dugesia ryukyuensis

                     The 58th/60th NIBB Conference, Okazaki, Japan (2012)

        13)Kobayashi, K.

                     “Tryptophan, one of sex-inducing substances in the Sexual induction in the asexual form of the planarian Dugesia ryukyuensis

                     planarian Dugesia ryukyuensis

                     Planarian Regeneration Research Meeting in Kyoto, Kyoto, Japan (2011)

        12) Maezawa, T., Tanaka, H., Nakagawa, H., Horiike, K., Kobayashi, K.

                     “D-amino acid oxidase represses the sexual induction in the planarian Dugesia ryukyuensis

                     Planarian Regeneration Research Meeting in Kyoto, Kyoto, Japan (2011)

        11) Kobayashi, K.

               “Sexual induction in the asexual form of the planarian Dugesia ryukyuensis.”

               Joint Meeting of the German and Japanese Societies of Developmental Biologists, Dresden, Germany (2011)

     10) Kobayashi, K.

               “Sexual induction in the asexual form of the planarian.”

                     Satellite Symposium to SDB and Japanese SDB Joint Meeting, Albuquerque, USA (2010)

       9) Kobayashi, K., Aoki, M., Hoshi, M., Matsumoto, M.

            “Sexual induction by feeding in an asexual strain of the planarian, Dugesia ryukyuensis.”

               The 1st International Meeting on Planarian Biology, Münster, Germany (2010)

       8) Kobayashi, K.

                     “Sexual reproduction in triploid forms of planarian Dugesia ryukyuensis.”

            XXth International Congress of Zoology, Paris, France (2008)

          7) Kobayashi, K.

                     “Sexualization in asexual planarians.”

               Research Seminar in Evolutionary Biology, Basel, Switzerland (2007)

          6)Kobayashi, K.

                     “Reproductive mode of the inbred offspring of experimental sexualized worms in the triclad Dugesia ryukyuensis.”

               3rd Meeting on Hermaphrodites, Tübingen, Germany (2006)

          5)Kobayashi, K.

                     “Experimental transition from fissiparous to oviparous form in the triclad Dugesia ryukyuensis.”

           10th International Symposium on Flatworm Biology, Innsbruck, Austria (2006)

       4)Kobayashi, K.

                     “Transition from fissiparous to oviparous form by a sexualizing substance(s) in the planarian Dugesia ryukyuensis.”

               The 52nd NIBB Conference: Reproductive Strategies, Okazaki, Japan (2006)

       3)Kobayashi, K., Arioka, S., Matsumoto, M., Hoshi, M.

                     “Switch of alternative reproductive modes- Sexualization of exclusively asexual worms in the planarians.

                     5th Japan-U.S. Seminar, Awaji, Japan (2003)

       2)Kobayashi, K.

                     “Transition between asexuals and sexuals in the planarians.”

                     IIAS Symposium on "Conflict and Compromise between Parent and Offspring"  Nara, Japan (2001)

       1)Kobayashi, K., Hoshi, M.

                     “Switching from asexual to sexual reproduction in the planaria.”

                     Symposium on "Alternative Reproductive Strategies" Hayama, Japan(1999)