Talk:Medaka Development: Difference between revisions
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<pubmed limit=5>Medaka Embryology</pubmed> | <pubmed limit=5>Medaka Embryology</pubmed> | ||
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===foxl3 is a germ cell-intrinsic factor involved in sperm-egg fate decision in medaka=== | |||
Science. 2015 Jun 11. pii: aaa2657. [Epub ahead of print] | |||
Nishimura T1, Sato T2, Yamamoto Y3, Watakabe I3, Ohkawa Y4, Suyama M2, Kobayashi S5, Tanaka M6. | |||
Abstract | |||
Sex determination is an essential step in the commitment of a germ cell to a sperm or egg. However, the intrinsic factors that determine the sexual fate of vertebrate germ cells are unknown. Here we show that foxl3, which is expressed in germ cells but not somatic cells in the gonad, is involved in sperm-egg fate decision in medaka fish. Adult XX medaka with disrupted foxl3 developed functional sperm in the expanded germinal epithelium of a histologically functional ovary. In chimeric medaka, mutant germ cells initiated spermatogenesis in female wild-type gonad. These results indicate that a germ cell-intrinsic cue for the sperm-egg fate decision is present in medaka and that spermatogenesis can proceed in a female gonadal environment. | |||
Copyright © 2015, American Association for the Advancement of Science. | |||
PMID 26067255 | |||
http://www.sciencemag.org/content/early/2015/06/10/science.aaa2657.abstract?sid=ef3c5fdb-9e4b-45bb-8a59-064c8b4087a3 | |||
==2012== | ==2012== | ||
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Cite this page: Hill, M.A. (2024, April 16) Embryology Medaka Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Talk:Medaka_Development |
10 Most Recent Papers
Note - This sub-heading shows an automated computer PubMed search using the listed sub-heading term. References appear in this list based upon the date of the actual page viewing. Therefore the list of references do not reflect any editorial selection of material based on content or relevance. In comparison, references listed on the content page and discussion page (under the publication year sub-headings) do include editorial selection based upon relevance and availability. (More? Pubmed Most Recent)
Medaka Development
<pubmed limit=5>Medaka Development</pubmed>
Medaka Embryology
<pubmed limit=5>Medaka Embryology</pubmed>
2015
foxl3 is a germ cell-intrinsic factor involved in sperm-egg fate decision in medaka
Science. 2015 Jun 11. pii: aaa2657. [Epub ahead of print]
Nishimura T1, Sato T2, Yamamoto Y3, Watakabe I3, Ohkawa Y4, Suyama M2, Kobayashi S5, Tanaka M6.
Abstract
Sex determination is an essential step in the commitment of a germ cell to a sperm or egg. However, the intrinsic factors that determine the sexual fate of vertebrate germ cells are unknown. Here we show that foxl3, which is expressed in germ cells but not somatic cells in the gonad, is involved in sperm-egg fate decision in medaka fish. Adult XX medaka with disrupted foxl3 developed functional sperm in the expanded germinal epithelium of a histologically functional ovary. In chimeric medaka, mutant germ cells initiated spermatogenesis in female wild-type gonad. These results indicate that a germ cell-intrinsic cue for the sperm-egg fate decision is present in medaka and that spermatogenesis can proceed in a female gonadal environment. Copyright © 2015, American Association for the Advancement of Science. PMID 26067255 http://www.sciencemag.org/content/early/2015/06/10/science.aaa2657.abstract?sid=ef3c5fdb-9e4b-45bb-8a59-064c8b4087a3
2012
The Effects of Rearing Density, Salt Concentration, and Incubation Temperature on Japanese Medaka (Oryzias latipes) Embryo Development
Zebrafish. 2012 Dec;9(4):185-90. doi: 10.1089/zeb.2012.0744.
Rosemore BJ, Welsh CA. Source Cloquet Senior High School , Cloquet, Minnesota.
Abstract
Abstract Environmental stressors are often present when an aquatic species, such as the Japanese medaka (Oryzias latipes) fish, are developing. This study examined the effects of some of these environmental stressors (variation in rearing density, salinity, and incubation temperature) on medaka embryo development. The hypotheses are if rearing density is increased, then hatching success will also be improved, while having no effect on embryo development; if the salt concentration is increased to 20 parts per thousand (ppt), then the rate of development will also be increased; if temperature is increased to 32°C, then the rate of development will also be increased. To determine the effects of variations in rearing density (1, 2, 3, and 4 eggs per well), the time of hatch was observed and noted. When testing variations in temperature (24°, 28°, and 32°C) and salinity (0.3, 10, 15, and 20 ppt), the onset of heartbeat and onset of retina pigmentation were observed. The original hypotheses were not all supported: as rearing density increased, success of hatch decreased; as salinity increased, only the rate of development for heartbeat increased; as temperature increased, the rate of development for both onset of the heartbeat and retina pigmentation also increased.
PMID 23244689
2011
2010
Snail gene expression in the medaka, Oryzias latipes
Gene Expr Patterns. 2010 Nov 19. [Epub ahead of print] Liedtke D, Erhard I, Schartl M.
Physiological Chemistry I, University of Würzburg, Biozentrum, Am Hubland, Würzburg, Germany. Abstract Snail transcription factors have prominent roles during embryonic development of vertebrates. They are often involved in cell migration processes during neural crest development, epithelial-mesenchymal transition and cancer progression. Comparative expression studies of snai gene family members in different vertebrate species are expected to contribute to a better understanding of their roles during development and reflect their evolutionary history. To investigate and to compare the expression patterns of snai genes in a second main fish model we used the medaka fish (Oryzias latipes), a complementary teleost model to zebrafish. We identified three snai gene family members, snai1a, snai1b and snai2. Phylogenetic and synteny analysis show a close relatedness of all family members to other vertebrate snai genes. Surprisingly, no homologue of snai3 could be identified in medaka, although this gene is present in zebrafish and the pufferfishes. Here we demonstrate that while most expression domains of medaka snai genes are comparable to zebrafish, the contribution of the individual paralogs to the overall pattern differs between the two teleosts and indicate lineage specific expression shuffling.
Copyright © 2010. Published by Elsevier B.V. PMID: 21094700
The National BioResource Project Medaka (NBRP Medaka): an integrated bioresource for biological and biomedical sciences
Exp Anim. 2010;59(1):13-23.
Sasado T, Tanaka M, Kobayashi K, Sato T, Sakaizumi M, Naruse K.
Laboratory of Bioresources, National Institute for Basic Biology, Okazaki, Japan. Abstract Medaka (Oryzias latipes) is a small freshwater teleost fish that serves as a model vertebrate organism in various fields of biology including development, genetics, toxicology and evolution. The recent completion of the medaka genome sequencing project has promoted the use of medaka as a comparative and complementary material for research on other vertebrates such as zebrafish, sticklebacks, mice, and humans. The Japanese government has supported the development of Medaka Bioresources since 2002. The second term of the Medaka Bioresource Project started in 2007. The National Institute for Basic Biology and Niigata University were selected as the core organizations for this project. More than 400 strains including more than 300 spontaneous and induced mutants, 8 inbred lines, 21 transgenic lines, 20 medaka-related species and 66 wild stock lines of medaka are now being provided to the scientific community and educational non-profit organizations. In addition to these live fish, NBRP Medaka is also able to provide cDNA/EST clones such as full-length cDNA and BAC/fosmid clones covering 90% of the medaka genome. All these resources can be found on the NBRP Medaka website (http://shigen.lab.nig.ac.jp/medaka/), and users can order any resource using the shopping cart system. We believe these resources will facilitate the further use of medaka and help to promote new findings for this vertebrate species.
PMID: 20224166
