TCR-Engineered Lymphocytes Targeting NY-ESO-1: In Vitro Assessment of Cytotoxicity against Tumors
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ABSTRACT: In this work, we compared the expression profiles of Anti-NY-ESO1- transduced T-cells with Anti-NY-ESO1- transduced T-cells co-cultured with SK-Mel-37.
Project description:In this work, we compared the expression profiles of Anti-MAGE-A4- transduced T-cells with Anti-MAGE-A4- transduced T-cells co-cultured with SK-Mel-37.
Project description:Autologous T cells transduced to express a high affinity T-cell receptor specific to NY-ESO-1 (letetresgene autoleucel, lete-cel) show promise in the treatment of metastatic synovial sarcoma, with 50% overall response rate. Biomarkers predictive of response and resistance remain to be better defined. In 45 synovial sarcoma patients, we analyzed the association of response to lete-cel (NCT01343043) with tumor gene expression. Analysis of tumor samples post-treatment illustrated lete-cel infiltration and decreased expression of macrophage genes, suggesting remodeling of the tumor microenvironment.
Project description:Autologous T cells transduced to express a high affinity T-cell receptor specific to NY-ESO-1 (letetresgene autoleucel, lete-cel) show promise in the treatment of metastatic synovial sarcoma, with 50% overall response rate. Biomarkers predictive of response and resistance remain to be better defined. In 45 synovial sarcoma patients, we analyzed the association of response to lete-cel (NCT01343043) with tumor gene expression. Analysis of tumor samples post-treatment illustrated lete-cel infiltration and decreased expression of macrophage genes, suggesting remodeling of the tumor microenvironment.
Project description:In this work, we compared the expression profiles of Anti-GD2- transduced T-cells with Anti-GD2-transduced T-cells co-cultured with SK-Mel-37.
Project description:Little is known about genes that promote melanoma cell growth and proliferation. siRNAs may be used to address the role of individual genesin these processes. RNAi library screens were used in the past to gain a comprehensive overview of all genes involved in cell growth, proliferation, migration and other cellular processes. A large-scale loss-of-function screen for eight different melanoma cell lines was performed using a pooled lentiviral shRNA library (GeneNet Human 50K lentiviral shRNA Library,cat#SI206B-1, System Biosciences) to identify genes relevant for melanoma cell growth and proliferation. shRNAs that lead to cell death or reduced growth of transduced melanoma cells are negatively selected and thereby underrepresented in the final cellular shRNA pool and vice versa. The shRNAs of the shRNA library (3-5 per gene) have complementary sequences to probes on the custom Affymetrix microarray HG-U133Plus2 and were analysed using this array. Well-known melanoma cell lines SK-Mel-103, A375, SK-Mel-147, SK-Mel-19, SK-Mel-28, SK-Mel-29, SK-Mel-5, WM3523cln6 were transduced with the lentiviral shRNA library and grown for 10 days under puromycin selection (day 10), control cells of respective cell lines were transduced and frozen immediately after transduction and genomic integration of shRNAs (day 0). Totel DNA was extracted and genomically integrated shRNAs were hybridized to Affymetrix microarrays (HG-U133Plus2.0 array).
Project description:This phase I trial studies the side effects and best schedule of vaccine therapy with or without sirolimus in treating patients with cancer-testis antigen (NY-ESO-1) expressing solid tumors. Biological therapies, such as sirolimus, may stimulate the immune system in different ways and stop tumor cells from growing. Vaccines made from a person’s white blood cells mixed with tumor proteins may help the body build an effective immune response to kill tumor cells that express NY-ESO-1. Infusing the vaccine directly into a lymph node may cause a stronger immune response and kill more tumor cells. It is not yet known whether vaccine therapy works better when given with or without sirolimus in treating solid tumors.
Project description:Despite recent therapeutic advances, multiple myeloma (MM) remains largely incurable. Here we report results of a phase I/II trial to evaluate the safety and activity of autologous T cells engineered to express an affinity-enhanced T cell receptor (TCR) recognizing a naturally processed peptide shared by the cancer-testis antigens NY-ESO-1 and LAGE-1. Twenty patients with antigen-positive MM received an average 2.4 × 10(9) engineered T cells 2 d after autologous stem cell transplant. Infusions were well tolerated without clinically apparent cytokine-release syndrome, despite high IL-6 levels. Engineered T cells expanded, persisted, trafficked to marrow and exhibited a cytotoxic phenotype. Persistence of engineered T cells in blood was inversely associated with NY-ESO-1 levels in the marrow. Disease progression was associated with loss of T cell persistence or antigen escape, in accordance with the expected mechanism of action of the transferred T cells. Encouraging clinical responses were observed in 16 of 20 patients (80%) with advanced disease, with a median progression-free survival of 19.1 months. NY-ESO-1-LAGE-1 TCR-engineered T cells were safe, trafficked to marrow and showed extended persistence that correlated with clinical activity against antigen-positive myeloma.