Project description:CAR-T cell therapy has achieved remarkable clinical outcomes, yet the autologous nature of FDA-approved CAR-T products present significant challenges in manufacturing, cost, and patient selection. Therefore, there is a growing demand for off-the-shelf cell therapy. Here we introduce an ex vivo feeder-free culture to differentiate gene-engineered HSCs into allogeneic NKT cells, as well as their CAR-armed and IL-15-enhanced derivatives (Allo15CAR-NKT cells). In order to study the epigenetic regulation of the generated cells, we performed DNA methylation sequencing on both IL-15-enhanced and non-IL-15-engineered AlloCAR-NKT cells. Conventional CAR-T cells were included as a control.
Project description:Ovarian cancer (OC) poses a significant challenge due to frequent recurrence linked to tumor heterogeneity and an immunosuppressive tumor microenvironment (TME). Targeting both OC cells and TME simultaneously holds promise for effective treatment. This study comprehensively analyzed 17 chemonaive and 18 refractory/recurrent OC samples, identifying mesothelin (MSLN) and natural killer receptor (NKR) ligands as tumor targets and CD1d as an OC TME target. Leveraging hematopoietic stem cell (HSC) gene engineering and feeder-free differentiation culture, we generated allogeneic MSLN-targeting CAR (MCAR)-engineered invariant natural killer T (MCAR-NKT) cells, demonstrating high-yield and high-purity production, potent antitumor efficacy, multiple tumor targeting mechanism, and significant in vivo expansion and persistence. Notably, these cells selectively deplete immunosuppressive TAMs and MDSCs, counteract tumor immune evasion, display a favorable safety profile with low risks of GvHD and CRS, and exhibit a stable “hypoimmunogenic” phenotype attributed to epigenetic and signaling regulations. These findings underscore the feasibility and therapeutic potential of allogeneic MCAR-NKT cell products for OC, laying a foundation for further translation and clinical development.
Project description:CAR-T cell therapy has achieved remarkable clinical outcomes, yet the autologous nature of FDA-approved CAR-T products present significant challenges in manufacturing, cost, and patient selection. Therefore, there is a growing demand for off-the-shelf cell therapy. Here we introduce an ex vivo feeder-free culture to differentiate gene-engineered HSCs into allogeneic NKT cells, as well as their CAR-armed and IL-15-enhanced derivatives (Allo15CAR-NKT cells). In order to study the epigenetic regulation of the generated cells, we performed DNA methylation sequencing on both IL-15-enhanced and non-IL-15-engineered AlloCAR-NKT cells. Conventional CAR-T cells were included as a control.
Project description:CAR-T cell therapy has achieved remarkable clinical outcomes, yet the autologous nature of FDA-approved CAR-T products present significant challenges in manufacturing, cost, and patient selection. Therefore, there is a growing demand for off-the-shelf cell therapy. Here we introduce an ex vivo feeder-free culture to differentiate gene-engineered HSCs into allogeneic NKT cells, as well as their CAR-armed and IL-15-enhanced derivatives (Allo15CAR-NKT cells). In order to study the epigenetic regulation of the generated cells, we performed DNA methylation sequencing on both IL-15-enhanced and non-IL-15-engineered AlloCAR-NKT cells. Conventional CAR-T cells were included as a control.
Project description:CAR-T cell therapy has achieved remarkable clinical outcomes, yet the autologous nature of FDA-approved CAR-T products present significant challenges in manufacturing, cost, and patient selection. Therefore, there is a growing demand for off-the-shelf cell therapy. Here we introduce an ex vivo feeder-free culture to differentiate gene-engineered HSCs into allogeneic NKT cells, as well as their CAR-armed and IL-15-enhanced derivatives (Allo15CAR-NKT cells). In order to study the epigenetic regulation of the generated cells, we performed DNA methylation sequencing on both IL-15-enhanced and non-IL-15-engineered AlloCAR-NKT cells. Conventional CAR-T cells were included as a control.
Project description:Ovarian cancer (OC) poses a significant challenge due to frequent recurrence linked to tumor heterogeneity and an immunosuppressive tumor microenvironment (TME). Targeting both OC cells and TME simultaneously holds promise for effective treatment. This study comprehensively analyzed 17 chemonaive and 18 refractory/recurrent OC samples, identifying mesothelin (MSLN) and natural killer receptor (NKR) ligands as tumor targets and CD1d as an OC TME target. Leveraging hematopoietic stem cell (HSC) gene engineering and feeder-free differentiation culture, we generated allogeneic MSLN-targeting CAR (MCAR)-engineered invariant natural killer T (MCAR-NKT) cells, demonstrating high-yield and high-purity production, potent antitumor efficacy, multiple tumor targeting mechanism, and significant in vivo expansion and persistence. Notably, these cells selectively deplete immunosuppressive TAMs and MDSCs, counteract tumor immune evasion, display a favorable safety profile with low risks of GvHD and CRS, and exhibit a stable “hypoimmunogenic” phenotype attributed to epigenetic and signaling regulations. These findings underscore the feasibility and therapeutic potential of allogeneic MCAR-NKT cell products for OC, laying a foundation for further translation and clinical development.