PMID- 11797219 OWN - NLM STAT- MEDLINE DCOM- 20020226 LR - 20201208 IS - 1000-3061 (Print) IS - 1000-3061 (Linking) VI - 17 IP - 5 DP - 2001 Sep TI - [Expression and purification of murine interleukin 18 in Escherichia coli and its antitumor effects]. PG - 548-52 AB - Total RNA was extracted from murine hepatocytes, and the cDNA of interleukin 18(IL-18) was amplified by RT-PCR. The cDNA was introduced into the expression vector pJW2 and sequenced. Under heat induction, the recombinant murine IL-18(rmIL-18) was expressed in inclusion bodies in E. coli with the yield accounting for 18% of total bacteria proteins. The inclusion bodies were dissolved with 5 mol/L urea, and rmIL-18 was purified using Sephadex G-100 column chromatography. In the presence of 0.5 mg/L Con A, the purified rmIL-18 showed dose-dependent IFN-gamma-inducing activity in murine splenocytes. The purified rmIL-18 exhibited significant antitumor effects in Kunming mice challenged intraperitoneally (i.p.) with H22 hepatocarcinoma when administered 10 micrograms rmIL-18 i.p. on days 1, 4 after challenge, and the mice survived resisted the rechallenged with H22 cells. FAU - Zhou, H AU - Zhou H AD - Research Center for Biochemistry and Molecular Biology, Xuzhou Medical College, Xuzhou 221002, China. FAU - Zhao, H R AU - Zhao HR FAU - Pei, D S AU - Pei DS FAU - Lu, L AU - Lu L FAU - Hu, S Q AU - Hu SQ LA - chi PT - Journal Article PL - China TA - Sheng Wu Gong Cheng Xue Bao JT - Sheng wu gong cheng xue bao = Chinese journal of biotechnology JID - 9426463 RN - 0 (Antineoplastic Agents) RN - 0 (DNA, Complementary) RN - 0 (Interleukin-18) RN - 0 (Recombinant Proteins) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - Antineoplastic Agents/*pharmacology MH - Chromatography, Gel/methods MH - DNA, Complementary/genetics MH - Electrophoresis, Polyacrylamide Gel MH - Escherichia coli/*genetics MH - Gene Expression MH - Interferon-gamma/metabolism MH - Interleukin-18/genetics/isolation & purification/*pharmacology MH - Liver Neoplasms, Experimental/immunology/pathology/prevention & control MH - Mice MH - Neoplasm Transplantation MH - Recombinant Proteins/immunology/isolation & purification/pharmacology MH - Spleen/cytology/drug effects/metabolism MH - Time Factors MH - Tumor Cells, Cultured EDAT- 2002/01/19 10:00 MHDA- 2002/02/28 10:01 CRDT- 2002/01/19 10:00 PHST- 2002/01/19 10:00 [pubmed] PHST- 2002/02/28 10:01 [medline] PHST- 2002/01/19 10:00 [entrez] PST - ppublish SO - Sheng Wu Gong Cheng Xue Bao. 2001 Sep;17(5):548-52.