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.
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Muneta, Y., Nagaya, H., Minagawa, Y. et al. Expression and one-step purification of bovine interleukin-21 (IL-21) in silkworms using a hybrid baculovirus expression system. Biotechnology Letters 26, 1453–1458 (2004). https://doi.org/10.1023/B:BILE.0000045643.66758.9d
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DOI: https://doi.org/10.1023/B:BILE.0000045643.66758.9d