The Japanese medaka, Oryzias latipes, is a vertebrate teleost model with a long history of genetic research. A number of unique features and established resources distinguish medaka from other vertebrate model systems. A large number of laboratory strains from different locations are available. Due to a high tolerance to inbreeding, many highly inbred strains have been established, thus providing a rich resource for genetic studies. Furthermore, closely related species native to different habitats in Southeast Asia permit comparative evolutionary studies. The transparency of embryos, larvae, and juveniles allows a detailed in vivo analysis of development. New tools to study diverse aspects of medaka biology are constantly being generated. Thus, medaka has become an important vertebrate model organism to study development, behavior, and physiology. In this review, we provide a comprehensive overview of established genetic and molecular-genetic tools that render medaka fish a full-fledged vertebrate system.
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http://dx.doi.org/10.1534/genetics.114.173849 | DOI Listing |
Mar Drugs
December 2024
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
To optimize the utilization of the sea star , which has demonstrated potential pharmaceutical properties in Chinese folk medicine, ten glycosides of polyhydroxy steroids, pectiniferosides A-J (-), were isolated and characterized. These compounds possess 3β, 6α, 8, 15α (or β), 16β-pentahydroxycholestane aglycones with sulfated and (or) methylated monosaccharides. The chemical structures of - were determined using NMR spectroscopy and HR-ESI-MS.
View Article and Find Full Text PDFSci Total Environ
December 2024
Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33600 Pessac, France.
In the context of increasing pollution pressure on aquatic ecosystems, it is essential to improve our knowledge of habitat quality and its suitability for organisms. It is particularly relevant to better integrate early life stages of fish into pollution biomonitoring programs, as they are reliable indicators of ecosystem integrity and because of their high sensitivity to pollutants. To avoid the influence of environmental parameters on their development, a lab-on-field approach, called the ex-situ exposure method, was developed.
View Article and Find Full Text PDFJ Exp Zool A Ecol Integr Physiol
December 2024
Departement of Biology, Faculty of Science, Academic Assembly, University of Toyama, Gofuku, Toyama, Japan.
In euryhaline teleosts, the cystic fibrosis transmembrane conductance regulator (CFTR) in seawater (SW)-type chloride cells facilitates apical Cl secretion for SW adaptation, while alternative Cl excretion pathways remain understudied. This study investigates the role of the calcium-activated chloride channel, Anoctamin 1 (ANO1), in the gills of the euryhaline Japanese medaka (Oryzias latipes) under hyperosmolality and cortisol (CORT) influence. Acclimation to artificial SW, NaCl, mannitol, or glucose significantly upregulated ANO1 and CFTR mRNA expression in gills, unlike urea treatment.
View Article and Find Full Text PDFComp Biochem Physiol C Toxicol Pharmacol
December 2024
Key Laboratory of Marine Ecological Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China. Electronic address:
Cathelicidin is a family of antimicrobial peptides in vertebrates that plays an important role in resistance and immunization against pathogenic microorganisms. In the present study, the full-length cDNA sequences of four novel cathelicidins (cathelicidin-1 to cathelicidin-4) in the tiger frog Hoplobatrachus rugulosus, encoding 153, 188, 132, and 160 amino acids, respectively, were firstly cloned by rapid amplification of the cDNA ends (RACE) technique. Sequence comparison and phylogenetic tree analysis indicated that the structures of the four cathelicidins are highly diverse.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Marine College, Shandong University, Weihai, Shandong 264209, China. Electronic address:
In this study, a mixed model was applied to the marine medaka to investigate the intergenerational effects of parental exposure to Triphenyltin (TPT) and the subsequent perturbations in parental gut microbiota on the gut microbiota of offspring. In addition, "microgenderome" has been focused on elucidating the different responses of males and females to environmental stress. The results indicated that TPT exhibited androgenic effects and long-term toxicological consequences, influencing the internal steroid hormone levels of the offspring and leading to their abnormal growth and development.
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