PMID- 15969006 OWN - NLM STAT- MEDLINE DCOM- 20100429 LR - 20201209 IS - 1000-3061 (Print) IS - 1000-3061 (Linking) VI - 19 IP - 3 DP - 2003 May TI - [Construction of MAGE-3 prokaryotic expression plasmid and its expression in Escherichia coli]. PG - 277-80 AB - To express the GST-MAGE-3 protein in E. coli, and investigate the antitumor immune responses induced by Dendritic cells (DCs) pulsed with GST-MAGE-3 protein, the recombinant expression plasmid pGEX-MAGE-3 was constructed by ligating MAGE-3 gene, which was amplified by RT-PCR and confirmed by sequencing, and the pGEX-4T-2 vector. The recombinant plasmid was transformed into BL-21 E. coli. The expression of GST-MAGE-3 was induced with IPTG. The GST-MAGE-3 protein expressed as high as 32% of the total cellular protein. After purification with Glutathione Sepharose 4B, the purity of the protein was more than 90%, and 3mg GST-MAGE-3 was obtained from 100 mL BL-21 lysate. Dendritic cells from gastric carcinoma patients were pulsed with GST-MAGE-3 protein, and these DCs were used to stimulate the autologous T. lymphocytes. After 7 days, the T. lymphocytes cocultured with DCs pulsed with GST-MAGE-3 antigen exhibited specific cytotoxicity against MAGE-3 positive SGC-7901 cells. It is concluded that the GST-MAGE-3 protein are able to present antigen to T. lymphocytes, activate antigen-specific CTLs and induce special antitumor immune responses in vitro. Our results lay the groundwork for further research of the MAGE-3 vaccine. FAU - Sun, Xiao-Dong AU - Sun XD AD - Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310016, China. FAU - Wu, Jin-Min AU - Wu JM FAU - Liu, Xing-E AU - Liu XE 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 (Antigens, Neoplasm) RN - 0 (MAGEA3 protein, human) RN - 0 (Neoplasm Proteins) SB - IM MH - Antigens, Neoplasm/genetics/isolation & purification/*metabolism/pharmacology MH - Blotting, Western MH - Cell Line, Tumor MH - Cells, Cultured MH - Dendritic Cells/drug effects/immunology MH - Electrophoresis, Polyacrylamide Gel MH - Escherichia coli/genetics/*metabolism MH - Genetic Vectors/*genetics MH - Humans MH - Neoplasm Proteins/genetics/isolation & purification/*metabolism/pharmacology MH - Plasmids/*genetics MH - Stomach Neoplasms/immunology MH - T-Lymphocytes/immunology EDAT- 2005/06/23 09:00 MHDA- 2010/04/30 06:00 CRDT- 2005/06/23 09:00 PHST- 2005/06/23 09:00 [pubmed] PHST- 2010/04/30 06:00 [medline] PHST- 2005/06/23 09:00 [entrez] PST - ppublish SO - Sheng Wu Gong Cheng Xue Bao. 2003 May;19(3):277-80.