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143 results

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Page 1
An evolutionary witness: the frog rana rugosa underwent change of heterogametic sex from XY male to ZW female.
Miura I. Miura I. Sex Dev. 2007;1(6):323-31. doi: 10.1159/000111764. Epub 2008 Jan 18. Sex Dev. 2007. PMID: 18391544 Review.
In particular, there is evidence that the male heterogametic sex determination of the frog Rana rugosa returned to its previous female state during speciation that occurred when the distribution range of the frog expanded across Japan. ...Change of the heterogametic …
In particular, there is evidence that the male heterogametic sex determination of the frog Rana rugosa returned to its previou …
Nanos3 of the frog Rana rugosa: Molecular cloning and characterization.
Kodama M, Yoshida M, Endo M, Kobayashi T, Oike A, Yasumasu S, Nakamura M. Kodama M, et al. Dev Growth Differ. 2018 Feb;60(2):112-120. doi: 10.1111/dgd.12421. Epub 2018 Feb 5. Dev Growth Differ. 2018. PMID: 29405266
To elucidate the role of Nanos in an amphibian species, we cloned Nanos3 cDNA from the testis of the R. rugosa frog. RT-PCR analysis showed strong expression of Nanos3 mRNA in the testis of adult R. rugosa frogs, but expression was not sexually dimorphic during gona …
To elucidate the role of Nanos in an amphibian species, we cloned Nanos3 cDNA from the testis of the R. rugosa frog. RT-PCR analysis …
Structural changes in female-to-male sex-reversing gonads of Rana RUGOSA.
Sakamoto D, Cho A, Abe T, Nakamura Y, Oike A, Kodama M, Nakamura M. Sakamoto D, et al. J Exp Zool A Ecol Genet Physiol. 2016 Mar;325(3):209-18. doi: 10.1002/jez.2009. J Exp Zool A Ecol Genet Physiol. 2016. PMID: 27076437
As a step toward understanding the histological changes during sex reversal in amphibians, we analyzed two- and three-dimensional (2D and 3D) structures of sex-reversing gonads in Rana rugosa frogs. 2D views revealed that many oocytes in the wild-type ovary disappea …
As a step toward understanding the histological changes during sex reversal in amphibians, we analyzed two- and three-dimensional (2D and 3D …
Estrogen biosynthesis in the gonad of the frog Rana rugosa.
Isomura T, Haraguchi S, Miyamoto K, Tsutsui K, Nakamura Y, Nakamura M. Isomura T, et al. Gen Comp Endocrinol. 2011 Jan 1;170(1):207-12. doi: 10.1016/j.ygcen.2010.10.015. Epub 2010 Oct 29. Gen Comp Endocrinol. 2011. PMID: 21036175
In certain species of amphibians gonadal differentiation is influenced by steroid hormones. In the case of the frog Rana rugosa testosterone given to tadpoles reverses sex from female to male, while the opposite reversal - male to female - can be achieved using estr …
In certain species of amphibians gonadal differentiation is influenced by steroid hormones. In the case of the frog Rana rugosa …
Sex determination in amphibians.
Nakamura M. Nakamura M. Semin Cell Dev Biol. 2009 May;20(3):271-82. doi: 10.1016/j.semcdb.2008.10.003. Epub 2008 Oct 17. Semin Cell Dev Biol. 2009. PMID: 18996493 Review.
Though the original heterogametic sex was female in amphibians, the two heterogametic types were probably interchangeable, suggesting that sex chromosomes evolved several times in this lineage. Indeed, the frog Rana rugosa has the XX/XY and ZZ/ZW sex-determining sys …
Though the original heterogametic sex was female in amphibians, the two heterogametic types were probably interchangeable, suggesting that s …
Isolation and characterization of the CYP17A1 gene and its processed pseudogene in Rana rugosa.
Suda M, Uno Y, Fujii J, Matsuda Y, Nakamura M. Suda M, et al. Comp Biochem Physiol B Biochem Mol Biol. 2011 Sep;160(1):54-61. doi: 10.1016/j.cbpb.2011.05.008. Epub 2011 Jun 2. Comp Biochem Physiol B Biochem Mol Biol. 2011. PMID: 21664481
CYP17A1 expression is up-regulated in the gonad in Rana (Glandirana) rugosa tadpoles treated with androgens to induce female-to-male sex-reversal. In this study, we isolated the CYP17A1 gene and its processed pseudogene from R. rugosa. The former was found to …
CYP17A1 expression is up-regulated in the gonad in Rana (Glandirana) rugosa tadpoles treated with androgens to induce female-t …
Molecular cloning and characterization of oocyte-specific Pat1a in Rana rugosa frogs.
Nakamura Y, Iwasaki T, Umei Y, Saotome K, Nakajima Y, Kitahara S, Uno Y, Matsuda Y, Oike A, Kodama M, Nakamura M. Nakamura Y, et al. J Exp Zool A Ecol Genet Physiol. 2015 Oct;323(8):516-26. doi: 10.1002/jez.1938. Epub 2015 Jul 2. J Exp Zool A Ecol Genet Physiol. 2015. PMID: 26136381
To address this issue, we isolated the full-length Pat1a cDNA from the frog Rana rugosa and examined its expression in the differentiating ovary of this frog. ...In addition, fluorescence in situ hybridization analysis showed Pat1a to have an autosomal locus, sugges …
To address this issue, we isolated the full-length Pat1a cDNA from the frog Rana rugosa and examined its expression in the dif …
Molecular cloning and expression in gonad of Rana rugosa WT1 and Fgf9.
Yamamura Y, Aoyama S, Oshima Y, Kato T, Osawa N, Nakamura M. Yamamura Y, et al. Zoolog Sci. 2005 Sep;22(9):1045-50. doi: 10.2108/zsj.22.1045. Zoolog Sci. 2005. PMID: 16219985
This study was undertaken to examine the expression of WT1 and Fgf9 in the developing gonad of amphibians. We first isolated the WT1 cDNA from the frog Rana rugosa. Like WT1 in mice, R. rugosa WT1 showed 2 isoforms; i.e., one had an additional 3 amino acids, …
This study was undertaken to examine the expression of WT1 and Fgf9 in the developing gonad of amphibians. We first isolated the WT1 cDNA fr …
Seasonal variations in integumental glycoconjugates of Rana rugosa.
Choi BT, Moon DY, Choi YH, Jo UB. Choi BT, et al. Anat Rec. 1997 Sep;249(1):24-31. doi: 10.1002/(SICI)1097-0185(199709)249:1<24::AID-AR4>3.0.CO;2-F. Anat Rec. 1997. PMID: 9294646 Free article.
In the present study, we report the seasonal variations of the integumental GCs in Rana rugosa. METHODS: GCs were investigated at the light microscopic level using conventional and lectin histochemistry. ...
In the present study, we report the seasonal variations of the integumental GCs in Rana rugosa. METHODS: GCs were investigated …
Androgen receptor of the frog Rana rugosa: molecular cloning and its characterization.
Yokoyama S, Oshima Y, Tokita J, Suda M, Shinozuka T, Nakamura M. Yokoyama S, et al. J Exp Zool A Ecol Genet Physiol. 2009 Dec 1;311(10):796-812. doi: 10.1002/jez.568. J Exp Zool A Ecol Genet Physiol. 2009. PMID: 19722274
The androgen receptor(AR) gene is located on the Z and W sex chromosomes in the frog Rana rugosa, designated Z- and W-AR, respectively. Among various tissues of an adult frog, AR expression levels were highest in the testis and brain. ...Thus, it is proposed that AR …
The androgen receptor(AR) gene is located on the Z and W sex chromosomes in the frog Rana rugosa, designated Z- and W-AR, resp …
143 results