Cullinan Therapeutics to Present Clinical Data from Phase 1 Study Evaluating Novel Anti-MICA/B Antibody, CLN-619, as Monotherapy and in Combination with a Checkpoint Inhibitor in Patients with Advanced Solid Tumors at ASCO 2024

CAMBRIDGE, Mass., April 24, 2024 (GLOBE NEWSWIRE) -- Cullinan Therapeutics, Inc. (Nasdaq: CGEM), a biopharmaceutical company focused on modality-agnostic targeted therapies, today announced that clinical data from its Phase 1 trial of CLN-619 in patients with advanced solid tumors will be presented at the 2024 American Society of Clinical Oncology (ASCO) Annual Meeting taking place in Chicago from May 31-June 4, 2024. The data will include first results from the dose escalation cohort of CLN-619 in combination with checkpoint inhibitor pembrolizumab and updated results from the monotherapy dose escalation cohort in patients with advanced solid tumors.

“We are pleased to present our initial clinical findings for CLN-619 plus pembrolizumab in patients with solid tumors at ASCO 2024, along with updated results from our monotherapy dose escalation study. CLN-619 is a novel, potential first-in-class antibody that binds to MICA and MICB stress-induced ligands that engage the activating receptor NKG2D, present on both innate and adaptive immune cells. CLN-619 exerts its effects through multiple mechanisms, providing an opportunity to combine CLN-619 with immunotherapies that target potentially synergistic immune activation pathways, such as checkpoint inhibitors,” said Jeffrey Jones, MD, MPH, MBA, Chief Medical Officer, Cullinan Therapeutics.

The details of the presentation include:

Poster Title: CLN-619 (anti-MICA/B antibody) alone and in combination with pembrolizumab for advanced solid tumors: Updated results of a Ph1 study

Author: Dr. Ignacio Melero, et al.

Poster Number: 2588

Session: Developmental Therapeutics—Immunotherapy

Session Date and Time: June 1, 2024, 9:00 AM-12:00 PM Central Time

About CLN-619 

CLN-619 is a potential first-in-class humanized IgG1 monoclonal antibody that binds to the stress induced ligands MICA and MICB, which are expressed on a wide variety of solid tumors and hematologic malignancies. Engagement of MICA/B by the activating receptor NKG2D, present on both cytotoxic innate and adaptive immune cells, results in target cell lysis. However, tumor cells can shed MICA/B via proteases they release into the tumor microenvironment, resulting in evasion of immune-mediated destruction. CLN-619 functions by restoring MICA/B expression on the surface of tumor cells to reinvigorate NKG2D-mediated immune activation, and by inducing antibody-dependent cellular toxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP), together promoting anti-tumor activity via multiple immune-mediated mechanisms. CLN-619 is being studied in an ongoing Phase 1 clinical trial (NCT05117476) both as a monotherapy and in combination with pembrolizumab. The study design allows dose level extensions as well as expansion in tumor-specific cohorts. CLN-619 will also be studied in a Phase 1 clinical trial (NCT06381141) in patients with relapsed/refractory multiple myeloma.