Preclinical study published in the Journal for ImmunoTherapy of Cancer supports continued evaluation of CD25-targeted ADC in Phase 1b clinical trial in selected advanced solid tumors
ADC Therapeutics SA (NYSE:ADCT), a late clinical-stage oncology-focused biotechnology company pioneering the development and commercialization of highly potent and targeted antibody drug conjugates (ADCs) for patients with hematological malignancies and solid tumors, today announced that preclinical data related to camidanlumab tesirine (Cami, formerly ADCT-301) has been published in the Journal for ImmunoTherapy of Cancer, the online journal of the Society for Immunotherapy of Cancer, in a paper titled, "CD25-targeted antibody-drug conjugate depletes regulatory T cells and eliminates established syngeneic tumors via antitumor immunity."
The study evaluated the antitumor activity of a pyrrolobenzodiazepine (PBD) dimer-based, CD25-targeted ADC, either alone or in combination with a checkpoint inhibitor, in CD25-negative syngeneic colon cancer models that exhibit tumor infiltration of CD25-expressing regulatory T cells (Tregs). Data demonstrated that single low doses of the CD25-targeted ADC resulted in potent and durable antitumor activity against established CD25-negative solid tumors with infiltrating Tregs, both as a monotherapy and in combination with an anti-PD1 checkpoint inhibitor.
Patrick van Berkel, Ph.D., Senior Vice President of Research and Development at ADC Therapeutics, said, "CD25 is expressed on Tregs that infiltrate the local tumor environment. We were pleased to see that our CD25-targeted ADC depleted CD25-expressing Tregs and not only showed strong anti-tumor activity as a monotherapy in preclinical models, but it also enhanced the activity of anti-PD1 treatment in these models. This study provides proof of concept for a new application of ADCs as immunotherapeutic agents and supports the continued evaluation of Cami in our ongoing Phase 1b clinical trial in patients with selected advanced solid tumors. We look forward to advancing the exploration of Cami as a novel immune-oncology approach for the treatment of solid tumors."
For information about the company's Phase 1b clinical trial of Cami in solid tumors, visit www.clinicaltrials.gov (identifier NCT03621982).