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Pharma Tech Outlook | Wednesday, June 16, 2021
Cullinan Oncology Gets Investigational New Drug (IND) FDA authorization for CLN-049, FLT3 x CD3 Bispecific Antibody for Relapsed/Refractory AML.
FREMONT, CA: Cullinan Oncology, Inc. (Nasdaq: CGEM) (Cullinan), an oncology company focused on patient outcomes, declares that the US Food and Drug Administration (FDA) has approved Cullinan Florentines' Investigational New Drug (IND) application for CLN-049, a FLT3 x CD3 bispecific antibody for the treatment of relapsed/refractory acute myeloid leukaemia (AML).
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“IND clearance by the FDA paves the way to test a differentiated treatment approach by targeting extracellular FLT3, an oncogenic driver in AML,” states Patrick Baeuerle, Cullinans Chief Scientific Officer, Biologics. “We are excited to initiate human dosing of CLN-049, a T cell-engaging, IgG-like antibody in patients with relapsed/refractory AML.”
CLN-049 is a genetically engineered bispecific antibody for relapsed/refractory AML. CLN-049 is designed to simultaneously bind target leukemic cells to FLT3 and T cells to CD3, triggering T cells to kill targeted cancer cells via their intrinsic cytolytic mechanisms. Studies showed that FLT3 is expressed by FACS staining on AML blasts in at least 75% of AML patients, regardless of oncogenic driver mutation. Thus, in most AML patients, FLT3's expression on the surface of leukemic blasts and its role as a known oncogenic driver make it an attractive therapeutic target for a T-cell engager approach. In preclinical studies, in AML cells, CLN-049 led to potent FLT3-dependent killing of leukemic cells in vitro at a wide range of FLT3 expression levels. In addition, CLN-049 treatment, even at low doses, led to survival benefit in an AML xenograft model and complete elimination of leukemic blasts in various mouse models implanted with primary leukemic cells or AML cell lines.
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