IGM-2537 bound with high affinity and avidity to CD123. In vitro, IGM-2537 engaged both CD123 and CD3 to induce potent T-cell activation and T-cell mediated cytotoxicity of CD123+ AML cells, and autologous CD123+ basophils and plasmacytoid dendritic cells (pDCs). Though IGM-2537 demonstrated comparable maximal killing activity to a comparator IgG TCE, IGM-2537 demonstrated minimal cytokine release.

1 year ago

Preclinical • IO biomarker

IFNG (Interferon, gamma) • TNFA (Tumor Necrosis Factor-Alpha) • CD123 (Interleukin 3 Receptor Subunit Alpha) • IL3RA (Interleukin 3 Receptor Subunit Alpha)

CD123 expression • IL3RA expression

IGM-2537

2years

CD123 Directed IgM Antibody-based T-cell Engager, IGM-2537, Demonstrates Potent in vitro and in vivo Activity with Minimal Cytokine Release (ASH 2022)

IGM-2537 bound to human CD123 with high affinity, avidity, and specificity. Furthermore, IGM-2537 bound a unique epitope of human CD123 in domain 2 which does not overlap with IL-3. IGM-2537 co-engaged with both CD123 and CD3 antigens, leading to T cell-redirected killing of AML cell lines with concomitant T cell activation.

2 years ago

Preclinical

IFNG (Interferon, gamma) • IL6 (Interleukin 6) • TNFA (Tumor Necrosis Factor-Alpha) • CD123 (Interleukin 3 Receptor Subunit Alpha)

CD123 positive • CD123 expression

IGM-2537