title: Mass production of somatic embryos expressing Escherichia coli heat-labile enterotoxin B subunit in Siberian ginseng.
abstract: The B subunit of Escherichia coli heat-labile toxin (LTB) is a potent mucosal immunogen and immunoadjuvant for co-administered antigens. In order to produce large scale of LTB for the development of edible vaccine, we used transgenic somatic embryos of Siberian ginseng, which is known as medicinal plant. When transgenic somatic embryos were cultured in 130L air-lift type bioreactor, they were developed to mature somatic embryos through somatic embryogenesis and contained approximately 0.36% LTB of the total soluble protein. Enzyme-linked immunosorbent assay indicated that the somatic embryo-synthesized LTB protein bound specifically to GM1-ganglioside, suggesting the LTB subunits formed active pentamers. Therefore, the use of the bioreactor system for expression of LTB proteins in somatic embryos allows for continuous mass production in a short-term period.
authors.affiliation: Team of Research & Development, Jeonbuk Bioindustry Development Institute, Jeonju 561-360, South Korea.
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Kang
authors.forename: Won-Seok
authors.initials: WS
authors.lastname: Lee
authors.forename: Eun-Gyung
authors.initials: EG
authors.lastname: Choi
authors.forename: Jae-Whune
authors.initials: JW
authors.lastname: Kim
authors.forename: Bang-Geul
authors.initials: BG
authors.lastname: Kim
authors.forename: Moon-Sik
authors.initials: MS
authors.lastname: Yang
mesh_terms: D000276:Adjuvants, Immunologic / Q000096:biosynthesis* / Q000235:genetics; D001427:Bacterial Toxins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D001428:Bacterial Vaccines / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D028001:Eleutherococcus / Q000196:embryology* / Q000235:genetics / Q000276:immunology; D004768:Enterotoxins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D004926:Escherichia coli / Q000235:genetics* / Q000276:immunology; D029968:Escherichia coli Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D006801:Humans; D018928:Immunity, Mucosal / Q000276:immunology; D030821:Plants, Genetically Modified / Q000196:embryology / Q000235:genetics / Q000276:immunology; D011994:Recombinant Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D001427:Bacterial Toxins; D001428:Bacterial Vaccines; D004768:Enterotoxins; D029968:Escherichia coli Proteins; D011994:Recombinant Proteins; C027538:heat-labile enterotoxin, E coli