Experts and Doctors on oryzias in Kumamoto, Japan
Locale: Kumamoto, Japan
Ishibashi H, Watanabe N, Matsumura N, Hirano M, Nagao Y, Shiratsuchi H, et al
. Toxicity to early life stages and an estrogenic effect of a bisphenol A metabolite, 4-methyl-2,4-bis(4-hydroxyphenyl)pent-1-ene on the medaka (Oryzias latipes). Life Sci. 2005;77:2643-55 pubmed
..1 and 1,000 microg/l, respectively. These results suggest that MBP has high toxicity for early life stages of the medaka, and that the estrogenic activity of MBP was about 250-fold higher than that of BPA to male medaka. ..
Shiraishi E, Imazato H, Yamamoto T, Yokoi H, Abe S, Kitano T. Identification of two teleost homologs of the Drosophila sex determination factor, transformer-2 in medaka (Oryzias latipes). Mech Dev. 2004;121:991-6 pubmed
Shiraishi E, Yoshinaga N, Miura T, Yokoi H, Wakamatsu Y, Abe S, et al
. Mullerian inhibiting substance is required for germ cell proliferation during early gonadal differentiation in medaka (Oryzias latipes). Endocrinology. 2008;149:1813-9 pubmed publisher
..These results suggest that in medaka, MIS indirectly stimulates germ cell proliferation through MISRII, expressed in the somatic cells immediately after they reach the gonadal primordium...
Ishibashi H, Yamauchi R, Matsuoka M, Kim J, Hirano M, Yamaguchi A, et al
. Fluorotelomer alcohols induce hepatic vitellogenin through activation of the estrogen receptor in male medaka (Oryzias latipes). Chemosphere. 2008;71:1853-9 pubmed publisher
..These results from both in vitro and in vivo assays strongly suggest that certain FTOHs, such as 6:2 FTOH and 8:2 FTOH, induce hepatic VTG through activation of ERalpha in male medaka. ..
Hayashi Y, Kobira H, Yamaguchi T, Shiraishi E, Yazawa T, Hirai T, et al
. High temperature causes masculinization of genetically female medaka by elevation of cortisol. Mol Reprod Dev. 2010;77:679-86 pubmed publisher
..These results strongly suggest that HT induces masculinization of XX medaka by elevation of cortisol level, which, in turn, causes suppression of germ cell proliferation and of fshr mRNA expression...
Sankoda K, Matsuo H, Ito M, Nomiyama K, Arizono K, Shinohara R. Identification of triclosan intermediates produced by oxidative degradation using TiO2 in pure water and their endocrine disrupting activities. Bull Environ Contam Toxicol. 2011;86:470-5 pubmed publisher
..It was found that tetraclosan and 2,4-dichlorophenol have stronger thyroid hormone activities than triclosan in the presence of S9. ..
Shiraishi E, Hosseini H, Kang D, Kitano T, Akiyama H. Nanosecond pulsed electric field suppresses development of eyes and germ cells through blocking synthesis of retinoic acid in Medaka (Oryzias latipes). PLoS ONE. 2013;8:e70670 pubmed publisher
..These results confirm that nsPEFs induce novel effects during embryogenesis in medaka. ..