Celyad Oncology reports third quarter 2023 financial results and recent business highlights - Seite 2

• shRNA multiplexing platform:
  • Data validating our microRNA (miRNA)-based multiplex shRNA approach, which allows to down-regulate several genes simultaneously, were presented at the 4th International Conference on Lymphocyte Engineering (ICLE) in Munich (September 12-14) and at the 38th Annual Meeting of the Society for Immunotherapy of Cancer (SITC) in San Diego (November 1-5) and posters are available on the company’s website, at https://celyad.com/our-science-technology/publications/;
  • With our approach we proved the feasibility of the simultaneous knock-down of 4 co-inhibitory receptors (PD-1, LAG-3, TIM-3 and CD95) to decrease the expression of exhaustion markers at the surface of CAR T-cells and the feasibility of this approach to improve allogeneic CAR T-cell viability by allowing evasion from graft-versus-host disease (GvHD), host-versus-graft (HvG) reaction and CD95L-induced autophagy.
  • The results detailing the technical aspects of the development of this platform and showcasing the easiness, efficiency, and tunability of this technology to knock-down up to four target genes simultaneously have been published in Molecular Therapy – Nucleic Acids as of September 20.
• NKG2D-based CAR T-cells:
  • We have developed different CD19/NKG2DL, BCMA/NKG2DL and PSMA/NKG2DL multi-specific CAR T-cells, utilizing both tandem constructs – that encompass the extracellular domain of the natural NKG2D receptor fused to a scFv targeting CD19, BCMA or PSMA, or dual constructs – that co-express the NKG2D-based CAR with an anti-CD19, anti-BCMA or anti-PSMA CAR, respectively;
  • Our data provides the proof-of-concept that NKG2DL are valuable targets in a multispecific CAR approach;
  • Specifically, we showed that CD19/NKG2DL multispecific CAR T-cells, and in particular dual receptors, are highly effective in vitro against CD19+ and CD19- cell lines and against CD19+ primary B-cell acute lymphoblastic leukemia (B-ALL) cells. In vivo, CD19/NKG2DL tandem CAR T-cells outperforms dual CAR T-cells in controlling tumor growth in an aggressive B-ALL relapse model.
  • In vitro data generated with BCMA/NKG2DL and PSMA/NKG2DL multispecific CAR T-cells further validate this approach and its application in other hematological and solid indications.
  • Preliminary data were presented at the 4th ICLE conference in Munich (September 12-14) and at the 38th SITC meeting in San Diego (November 1-5) and posters are available on the company’s website, at https://celyad.com/our-science-technology/publications/.

Financial highlights – Third quarter 2023 financial review