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RNA sequencing comparison of B7-H3.TMIGD2 and B7-H3.CD28.4-1BB CAR-T cells to CD19.CD28.4-1BB CAR-T cells in vitro

ABSTRACT: RNA sequencing comparison of B7-H3.TMIGD2 and B7-H3.CD28.4-1BB CAR-T cells to CD19.CD28.4-1BB CAR-T cells in vitro

PROVIDER: PRJNA1071016 | ENA |

REPOSITORIES: ENA

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RNA sequencing comparison of B7-H3.TMIGD2 and B7-H3.CD28.4-1BB CAR-T cells to CD19.CD28.4-1BB CAR-T cells in vitro

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Targeting Osteosarcoma with Canine B7-H3 CAR T Cells and Impact of CXCR2 Co-Expression on Functional Activity

Project description:Abstract. The use of large animal spontaneous models of solid cancers, such as dogs with osteosarcoma (OS), can help develop new cancer immunotherapy approaches, including chimeric antigen receptor (CAR) T cells. Therefore, the goal of the present study was to generate canine CAR T cells targeting the B7-H3 (CD276) co-stimulatory molecule overexpressed by several solid cancers, including OS and glioma in both humans and dogs, and to assess their ability to recognize B7-H3 expressed by canine OS cell lines or by canine tumors in xenograft models. A second objective was to determine whether a novel dual CAR that expressed a chemokine receptor together with the B7-H3 CAR improved the activity of the canine CAR T cells. Therefore, in the studies reported here we examined B7-H3 expression by canine OS tumors, evaluated target engagement by canine B7-H3 CAR T cells in vitro, and compared the relative effectiveness of B7-H3 CAR T cells versus B7-H3-CXCR2 dual CAR T cells in canine xenograft models. We found that most canine OS tumors expressed high levels of B7-H3, whereas levels were undetectable on normal dog tissues. In vitro, both B7-H3 CAR T cells demonstrated activation and OS-specific target killing in vitro, but there was significantly greater cytokine production by B7-H3-CXCR2 CAR T cells. In canine OS xenograft models, little antitumor activity was generated by B7-H3 CAR T cells, whereas B7-H3-CXCR2 CAR T cells significantly inhibited tumor growth, inducing complete tumor elimination in most treated mice. These findings indicated therefore that addition of a chemokine receptor could significantly improve the anti-tumor activity of canine B7-H3 CAR T cells, and that evaluation of this new dual CAR construct in dogs with primary or metastatic OS is warranted since such studies could provide a critical and realistic validation of the chemokine receptor concept.

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RNA sequencing comparison of B7-H3.TMIGD2 and B7-H3.CD28.4-1BB CAR-T cells

Project description:This SuperSeries is composed of the SubSeries listed below.

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