title: Development of gene transfer technology for black tiger shrimp, Penaeus monodon.
abstract: An effective foreign gene transfer method for shrimp would have several potential uses in the shrimp culture industry, such as in preventing infectious diseases. We evaluated two gene transfer methods and used black tiger shrimp, Penaeus monodon, as a model target species. For a promoter, we used the 1,592-bp promoter region of the EF-1alpha gene, a house-keeping gene, of kuruma shrimp Marsupenaeus japonicus. The promoter region was linked to either the gene for green fluorescence protein (GFP) or the gene for chloramphenicol acetyl transferase (CAT). The fusion genes were designated pJEF-GFP and pJEF-CAT, respectively. The pJEF-GFP gene was introduced into fertilized eggs of black tiger shrimp by microinjection and particle gun bombardment. The survival rate of the microinjected eggs was 17.6%, and 1.0% of the treated embryos were found to be GFP-positive. However, the GFP-positive embryos were damaged and embryogenesis did not progress. The survival rate of the particle-bombarded eggs was 60.6%, and 0.42% of the treated embryos were found to be GFP-positive. Ubiquitous GFP expression was observed from 8 hr post-fertilization and these embryos developed and hatched normally. The pJEF-CAT gene was introduced into fertilized eggs of black tiger shrimp using the optimized conditions of the particle gun bombardment. CAT activity was observed from 1 to 7 days post-fertilization, with the highest activities being observed at 5 and 7 days post-hatching.
authors.affiliation: Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Yazawa
authors.forename: Keisuke
authors.initials: K
authors.lastname: Watanabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Koyama
authors.forename: Lila
authors.initials: L
authors.lastname: Ruangapan
authors.forename: Anchalee
authors.initials: A
authors.lastname: Tassanakajon
authors.forename: Ikuo
authors.initials: I
authors.lastname: Hirono
authors.forename: Takashi
authors.initials: T
authors.lastname: Aoki
mesh_terms: D000818:Animals; D017756:Aquaculture / Q000379:methods*; D001483:Base Sequence; D019470:Biolistics; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics; D017931:DNA Primers; D018014:Gene Transfer Techniques; D049452:Green Fluorescent Proteins / Q000235:genetics; D008845:Microinjections; D008969:Molecular Sequence Data; D010063:Ovum / Q000378:metabolism / Q000502:physiology*; D033561:Penaeidae / Q000235:genetics*; D020648:Peptide Elongation Factor 1 / Q000235:genetics; D010957:Plasmids / Q000235:genetics; D011401:Promoter Regions, Genetic / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013045:Species Specificity; D016019:Survival Analysis
chemical_list: D017931:DNA Primers; D020648:Peptide Elongation Factor 1; D049452:Green Fluorescent Proteins; D015500:Chloramphenicol O-Acetyltransferase