PMID- 10838667 OWN - NLM STAT- MEDLINE DCOM- 20000816 LR - 20191104 IS - 1524-9557 (Print) IS - 1524-9557 (Linking) VI - 23 IP - 3 DP - 2000 May-Jun TI - Development of a polynucleotide vaccine from melanoma antigen recognized by T cells-1 and recombinant protein from melanoma antigen recognized by T cells-1 for melanoma vaccine clinical trials. PG - 379-86 AB - MART-1, a melanoma antigen recognized by T cells-1, is a melanocyte lineage-differentiation antigen expressed only in melanocytes and melanoma cells. This protein is recognized by many T-lymphocyte lines that are human leukocyte antigen (HLA)-A2 restricted and melanoma reactive. These observations have culminated in an array of clinical trials of MART-1 immunization using recombinant viruses or MART-1 immunodominant peptides. Polynucleotide immunization is a promising alternative to recombinant viral vaccines that allows delivery of the full-length cDNA encoding all potential peptide epitopes in a vector that is uncompromised by anti-viral immunity. In preparation for a phase I clinical trial of MART-1 polynucleotide immunization in patients with resected melanoma who were at significant risk for recurrence, the authors constructed a plasmid DNA encoding the MART-1 cDNA under transcriptional regulatory control of the cytomegalovirus immediate early promoter-enhancer and partially deleted intron A. This plasmid directs high-level MART-1 expression in transduced myoblasts and maturing myocytes diffusely throughout the cytoplasm. Immunization of mice with this construct by intramuscular injection elicited MART-1-specific immune responses in all animals. Previous trials of MART-1 immunization have been unable to examine the humoral immune response to MART-1 because of a lack of sufficient, highly purified protein. We have produced and purified Escherichia coli recombinant MART-1 protein using a glutathione-S-transferase fusion protein expression system. Protein staining of a sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed a band of MART-1 protein at approximately 20 kD; and Western immunoblotting with an anti-MART-1 monoclonal antibody confirmed a doublet at approximately 20 kD. These findings are consistent with previous reports using different expression systems for recombinant MART-1. This protein preparation functioned well in enzyme-linked immunosorbent assays (ELISAs) to detect anti-MART-1 antibody responses in a mouse model; and a panel of healthy donor human sera showed minimal binding to ELISA plates coated with the protein, supporting its utility in monitoring human anti-MART-1 antibody responses. The glutathione-S-transferase fusion method yielded approximately 200 micrograms MART-1 per 2-L bacterial culture, enough to coat 100 ELISA plates. FAU - Lee, S W AU - Lee SW AD - Department of Medicine, University of Alabama at Birmingham 35294-3300, USA. FAU - Li, H AU - Li H FAU - Strong, T V AU - Strong TV FAU - Moore, S E AU - Moore SE FAU - Conry, R M AU - Conry RM LA - eng GR - CA 61397/CA/NCI NIH HHS/United States GR - CA 68256/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Immunother JT - Journal of immunotherapy (Hagerstown, Md. : 1997) JID - 9706083 RN - 0 (Antigens, Neoplasm) RN - 0 (Cancer Vaccines) RN - 0 (MART-1 Antigen) RN - 0 (MLANA protein, human) RN - 0 (Mlana protein, mouse) RN - 0 (Neoplasm Proteins) RN - 0 (Recombinant Proteins) RN - 0 (Vaccines, DNA) SB - IM MH - Animals MH - Antibody Formation MH - Antigens, Neoplasm/*immunology/*isolation & purification MH - Cancer Vaccines/*immunology MH - Cell Line MH - Enzyme-Linked Immunosorbent Assay MH - Escherichia coli/genetics MH - Female MH - Immunohistochemistry MH - MART-1 Antigen MH - Melanoma/*immunology MH - Mice MH - Mice, Inbred BALB C MH - Neoplasm Proteins/genetics/*immunology MH - Plasmids MH - Recombinant Proteins/immunology/isolation & purification MH - Vaccines, DNA/*immunology EDAT- 2000/06/06 09:00 MHDA- 2000/08/19 11:00 CRDT- 2000/06/06 09:00 PHST- 2000/06/06 09:00 [pubmed] PHST- 2000/08/19 11:00 [medline] PHST- 2000/06/06 09:00 [entrez] AID - 10.1097/00002371-200005000-00011 [doi] PST - ppublish SO - J Immunother. 2000 May-Jun;23(3):379-86. doi: 10.1097/00002371-200005000-00011.