In the Laboratory of Aquatic Biochemistry, we are studying molecular mechanisms of metabolism, endocrine function, homeostasis, and metamorphosis of aquatic organisms using biochemical and molecular biological techniques.
1) Studies on metamorphosis in jellyfish larvae (Kuniyoshi, H.)
2) Studies on skeletal myosin heavy chain from abdominal muscle of shrimps and the adaptation of shrimps to the environmental salinity alternation (Koyama, H.)
Metamorphosis, Bioactive substance, Myosin heavy chain gene expression, Adaptation to environment
Kuruma shrimp cultured in 3.4 % salinity tank
A strobila (center) and polyps of the moon jellyfish
Tsujita,N., Kuwahara,H., Koyama,H., Yanaka,N., Arakawa,K. and Kuniyoshi,H. (2017) Molecular characterization of aspartylglucosaminidase, a lysosomal hydrolase upregulated during strobilation in the moon jellyfish, Aurelia aurita. Biosci. Biotech. Biochem. 81(5), 938–950.
Miyake,Y., Sakai,Y. and Kuniyoshi,H. (2012) Molecular cloning and expression profile of sex-specific genes, Figla and Dmrt1, in the protogynous hermaphroditic fish, Halichoeres poecilopterus.. Zool. Sci. 29(10), 690-701.
Kuniyoshi,H., Okumura,I., Kuroda,R., Tsujita,N., Arakawa,K., Shoji,J., Saito,T. and Osada,H. (2012) Indomethacin induction of metamorphosis from the asexual stage to sexual stage in the moon jellyfish, Aurelia aurita. Biosci. Biotech. Biochem. 76(7), 1397-1400.
Miyake,Y., Nishigakiuchi,J., Sakai,Y. and Kuniyoshi,H. (2012) Ovarian degeneration during the female-to-male sex change in the protogynous hermaphroditic fish, Halichoeres poecilopterus. Ichthyol. Res. 59(3), 276-281.
Koyama, H., Okamoto, S., Watanabe, N., Hoshino, N., Jimbo, M., Yasumoto, K. and Watabe, S. (2015). Dynamic changes in the accumulation of metabolites in brackish water clam Corbicula japonica associated with alternation of salinity. Comp. Biochem. Physiol. 181B, 59-70.
Koyama, H., Piyapattanakorn, S. and Watabe, S. (2013). Cloning of skeletal myosin heavy chain gene family from adult pleopod muscle and whole larvae of shrimps. J. Exp. Zool. 319A, 268-276.
Koyama, H., Akolkar, D. B., Piyapattanakorn, S. and Watabe, S. (2012). Cloning, expression, and localization of two types of fast skeletal myosin heavy chain genes from black tiger and Pacific white shrimps. J. Exp. Zool. 317A, 608-621.
Koyama, H., Akolkar, D. B., Shiokai, T., Nakaya, M., Piyapattanakorn, S. and Watabe, S. (2012). The occurrence of two types of fast skeletal myosin heavy chains from abdominal muscle of kuruma shrimp Marsupenaeus japonicus and their different tissue distribution. J. Exp. Biol. 215, 14-21.