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- W2000615271 abstract "The goal of immunotherapy is to stimulate the immune system by modification of tumor cells or expansion of lymphocytes which respond specifically to tumor antigens. In this study, we will apply techniques of direct gene transfer to enhance the immune response against tumors in vivo. Patients with advanced cancer who have failed all effective therapy will be treated by injection of a DNA/liposome complex directly within the tumor. DNA will be used which encodes a heterodimeric cell surface protein recognized in the transplantation response. These genes include the HLA-B7 histocompatibility antigen and β-2 microglobulin gene in a non-viral eukaryotic expression vector plasmid. For this vector, a safe and effective dose to introduce this recombinant gene in HLA-B7¯ patients will be established. HLA-B7 expression will be confirmed in vivo, and the immune response stimulated by the expression of this antigen will be characterized. We will also determine whether this treatment facilitates tumor regression alone or in combination with other treatment modalities. This study will employ a similar strategy to our previous gene therapy protocol, but employs four improvements in technology, including more efficacious liposomes, optimized vector expression, catheter delivery and application to other several types of cancer. These studies will facilitate the development of other approaches, using different recombinant genes or in combination with cytokines or adoptive T cell therapy, to augment tumor immunity, and allow for greater potential efficacy. This method will also establish the safety of this non-viral approach to gene therapy, which could potentially be extended to treat a variety of other human diseases. Many types of cancer cannot be cured by traditional medical treatments, including drugs, surgery, or radiation. In this study, an experimental treatment will be offered that may help to fight this disease. We will attempt to induce tumor regression by the introduction of genetic material that directs the synthesis of proteins which stimulate the immune system. The genetic material, DNA, will be introduced directly into the tumor by mixing it with fat bodies, or liposomes, and this mixture will be injected into the tumor or delivered by a catheter. The DNA will be taken into cells and cause them to produce proteins that stimulate tissue rejection. These proteins, called histocompatibility proteins, cause cells which contain it to be recognized as foreign by the immune system. In some cases, another immune stimulatory protein, interleukin-2, will also be included. The goal of the treatment is to stimulate the immune system to attack and kill the tumor. In this study, we will determine a safe and effective dose to administer the DNA liposome complex. Increasing amounts of this complex will be used in different patient populations. If no side effects are observed, repeated treatments will be instituted. The expression and nature of the immune response will also be characterized. This treatment may provide a therapeutic effect in cancer and could be applied to the treatment of other diseases." @default.
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- W2000615271 date "1994-01-01" @default.
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- W2000615271 title "Immunotherapy for Cancer by Direct Gene Transfer into Tumors. Howard Hughes Medical Institute Research Laboratories, Ann Arbor, Michigan" @default.
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- W2000615271 doi "https://doi.org/10.1089/hum.1994.5.1-57" @default.
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