Cloning of cDNA for canine interleukin-18 and canine interleukin-1beta converting enzyme and expression of canine interleukin-18.
Cloning of canine interleukin-18 (IL-18) and canine interleukin-1beta converting enzyme (ICE) cDNA was carried out by using murine IL-18 cDNA and human ICE cDNA, respectively, as probes. Sequence homology to known sequences of human, mouse, or rat genes was noted at nucleotide and amino acid levels. Canine IL-18 mRNA was expressed in various canine organs, whereas canine ICE mRNA was expressed in only a few, particularly in the brain and testis. Cloned canine IL-18 cDNA was expressed in Escherichia coli. The resulting protein promoted induction of canine interferon-y (IFN-y) from stimulated canine lymphocytes. Canine IL-18 and canine IL-12 produced canine IFN-gamma synergistically. Canine IL-18 suppressed the growth of tumor cells transplanted in SCID mice. Cloned canine IL-18 should prove useful as an anticancer agent.
Toray Industries, Inc., Chemicals Research Laboratories, Nagoya, Japan. Fumiyoshi_Okano@nts.toray.co.jp
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Okano
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Satoh
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Ido
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Yamada
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D020170:Caspase 1 / Q000235:genetics*; D002478:Cells, Cultured; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics*; D004285:Dogs; D006801:Humans; D020382:Interleukin-18 / Q000235:genetics*; D051379:Mice; D016513:Mice, SCID; D008969:Molecular Sequence Data; D009368:Neoplasm Transplantation; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D016511:Severe Combined Immunodeficiency / Q000235:genetics
D018076:DNA, Complementary; D020382:Interleukin-18; D020170:Caspase 1