407. A Novel Rabbit Antibody-Derived, Anti-CD123 LV/CAR Construct for AML Immunotherapy

Adoptive immunotherapy for AML with CD123-engager T cells

Background T cell immunotherapy is one promising approach to improve outcomes for patients with AML; however, infused T cells do not redirect resident T cells to tumors. To overcome this, we have genetically modified T cells to produce a secretable, bispecific T cell engager (ENG-T cells). Consistent synthesis of engagers by T cells should be superior to the direct infusion of the recombinant b...

Targeting CD157 in AML using a novel, Fc-engineered antibody construct

Antibody-based immunotherapy represents a promising strategy to eliminate chemorefractory leukemic cells in acute myeloid leukemia (AML). In this study, we evaluated a novel Fc-engineered antibody against CD157 (MEN1112) for its suitability as immunotherapy in AML. CD157 was expressed in 97% of primary AML patient samples. A significant, albeit lower expression level of CD157 was observed withi...

CD123 AML targeting by chimeric antigen receptors

Chimeric antigen receptor (CAR) modified T cells have emerged as powerful tools for controlling leukemias. We recently showed that anti-CD123 CAR-expressing cytokine-induced killer T cell treatment is an effective immunotherapeutic approach to eradicate Acute Myeloid Leukemia (AML) cells. Here, we discuss how this genetically modified cell-based strategy could be relevant to the field of AML th...

CD123 target validation and preclinical evaluation of ADCC activity of anti-CD123 antibody CSL362 in combination with NKs from AML patients in remission

Despite the heterogeneity of acute myeloid leukemia (AML), overexpression of the interleukin-3 receptor-α (CD123) on both the more differentiated leukemic blast and leukemic stem cells (LSCs) provides a therapeutic target for antibody treatment. Here we present data on the potential clinical activity of the monoclonal antibody CSL362, which binds to CD123 with high affinity. We first validated ...

Development of a Novel Inhibitory Chimeric Anti-HER2 Monoclonal Antibody