title: Expression and one-step purification of bovine interleukin-21 (IL-21) in silkworms using a hybrid baculovirus expression system.
abstract: A hybrid baculovirus, a hybrid of the Autographa californica nuclear polyhedrosis virus and the Bombyx mori nuclear polyhedrosis virus, was used for the large-scale production of bovine interleukin-21 (IL-21) in silkworms. A recombinant hybrid baculovirus containing the full length of the cDNA of bovine interleukin-21 was constructed and used to infect silkworm larvae or silkmoth pupae. After the infection of the virus, bovine mature IL-21 was produced in the haemolymph or pupal cell lysates. A one-step purification of bovine mature IL-21 from haemolymph using a cation exchange column gave 0.5 mg. IL-21 from 30 ml haemolymph. The bovine IL-21 produced by silkworms strongly induced NK cell proliferation using a human NK cell-line, NK0, and enhanced the lymphokine activated killer (LAK) activity of bovine peripheral blood mononuclear cells.
authors.affiliation: Department of Immunology, National Institute of Animal Health, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan. ymuneta@affrc.go.jp
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Muneta
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Nagaya
authors.forename: Yu
authors.initials: Y
authors.lastname: Minagawa
authors.forename: Chiaki
authors.initials: C
authors.lastname: Enomoto
authors.forename: Sayaka
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Mori
mesh_terms: D000818:Animals; D016367:Baculoviridae / Q000235:genetics*; D012831:Bombyx / Q000235:genetics* / Q000378:metabolism*; D002417:Cattle; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D006801:Humans; D007378:Interleukins / Q000096:biosynthesis* / Q000302:isolation & purification / Q000494:pharmacology*; D015979:Killer Cells, Lymphokine-Activated / Q000187:drug effects*; D007694:Killer Cells, Natural / Q000187:drug effects*; D015202:Protein Engineering / Q000379:methods; D014162:Transfection / Q000379:methods*; D000098546:Interleukin-21
chemical_list: D007378:Interleukins; D000098546:Interleukin-21