• Title/Summary/Keyword: Self-fertilizing Fish

Search Result 5, Processing Time 0.017 seconds

Mining of Biomarker Genes from Expressed Sequence Tags and Differential Display Reverse Transcriptase-Polymerase Chain Reaction in the Self-fertilizing Fish, Kryptolebias marmoratus and Their Expression Patterns in Response to Exposure to an Endocrine-disrupting Alkylphenol, Bisphenol A

  • Lee, Young-Mi;Rhee, Jae-Sung;Hwang, Dae-Sik;Kim, Il-Chan;Raisuddin, Sheikh;Lee, Jae-Seong
    • Molecules and Cells
    • /
    • v.23 no.3
    • /
    • pp.287-303
    • /
    • 2007
  • Expressed sequence tags (ESTs) and differentially expressed cDNAs from the self-fertilizing fish, Kryptolebias marmoratus were mined to develop alternative biomarkers for endocrine-disrupting chemicals (EDCs). 1,577 K. marmoratus cDNA clones were randomly sequenced from the 5'-end. These clones corresponded to 1,518 and 1,519 genes in medaka dbEST and zebrafish dbEST, respectively. Of the matched genes, 197 and 115 genes obtained Unigene IDs in medaka dbEST and zebrafish dbEST, respectively. Many of the annotated genes are potential biomarkers for environmental stresses. In a differential display reverse transcriptase-polymerase chain reaction (DD RT-PCR) study, 56 differential expressed genes were obtained from fish liver exposed to bisphenol A. Of these, 16 genes were identified after BLAST search to GenBank, and the annotated genes were mainly involved in catalytic activity and binding. The expression patterns of these 16 genes were validated by real-time RT-PCR of liver tissue from fish exposed to bisphenol A. Our findings suggest that expression of these 16 genes is modulated by endocrine disrupting chemicals, and therefore that they are potential biomarkers for environmental stress including EDCs exposure.

cDNA Cloning and Tissue Distribution of Two Parvalbumin Isoforms from the Hermaphrodite fish Rivulus marmoratus(Cyprinodontiformes, Rivulidae)

  • Lee, Jae-Seong;Lee, Young-Mi;Jung, Sang-Oun;Lee, Chang-Joo
    • Journal of Aquaculture
    • /
    • v.18 no.2
    • /
    • pp.81-85
    • /
    • 2005
  • We isolated two parvalbumin cDNAS by expressed sequence tag analysis (1,577 ESTs in total) from the self-fertilizing fish Rivulus marmoratus (Cyprinodontiformes, Rivulidae). Two isoforms of parvalbumin genes showed high similarity to those of carp at 88% and 91% amino acid residues identity, respectively, and showed 79.8% similarity between two parvalbumin isoforms. Of 1,577 ESTs from R. marmroatus sequenced, parvalbumin 1 gene was most abundant. This gene was strongly expressed in the order of muscle, eye, and brain, while it was expressed slightly in other tissues. In this paper, we discussed on the R. marmoratus parvalbumin genes on its sequence and basic characteristics.