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  • Poster presentation
  • Open Access

The CD40 agonistic monoclonal antibody APX005M has potent immune stimulatory capabilities

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  • 1,
  • 1,
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Journal for ImmunoTherapy of Cancer20153 (Suppl 2) :P198

https://doi.org/10.1186/2051-1426-3-S2-P198

  • Published:

Keywords

  • Tumor Necrosis Factor Receptor
  • CD40 Antibody
  • IgG1 Monoclonal Antibody
  • Agonistic Effect
  • Agonistic Antibody

The co-stimulatory receptor CD40 is a member of the tumor necrosis factor receptor (TNFR) superfamily and plays an important role in the control and regulation of immune activation, especially in crosstalk between T cells and antigen presenting cells (APCs). The natural ligand for CD40 (CD40L, CD154) is expressed on activated T cells and provides a major component of T cell “help” for the immune response. Agonistic CD40 antibodies can substitute for the function of CD154 on T cells to boost immunity by stimulating antigen presentation and co-stimulation to T cells and have been shown to be potent boosters of anti-tumor immune responses. Anti-CD40 can directly inhibit tumor growth in CD40 expressing tumor cells.

APX005M is a humanized IgG1 monoclonal antibody that binds CD40 with high affinity and blocks the binding of CD40 to CD40L. APX005M activates dendritic cells, B cells and monocytes, and promotes antigen-specific T cell responses. APX005M demonstrates potent anti-tumor activity via ADCC and induction of apoptosis in CD40 expressing tumor cells. In comparison with other CD40 agonistic antibodies such as CP-870, 893 and SGN-40 analogs, APX005M has more potent CD40 agonistic effects and antibody effector function.

Authors’ Affiliations

(1)
Apexigen, Inc., San Carlos, CA, USA

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