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Discovery of Dual A2A/A2B Adenosine Receptor Antagonist and Clinical Candidate INCB106385
Chao Qi1, Matthew S McCammant1, Yong Li1
1Incyte Research Institute, Incyte Corporation, Wilmington, Delaware19803, United States.
Abstract:
Suppression of immune checkpoint pathways enables tumor cells to take over immunoregulatory functions, promoting cell growth and proliferation. Elevated adenosine production in the tumor microenvironment suppresses immune checkpoint control through activation of A2A adenosine receptors on immune cells. While A2A antagonists originally developed for CNS indications have entered oncology, their potency may be insufficient to challenge locally high adenosine concentrations within the tumor microenvironment for receptor occupancy. Here, we describe the discovery of INCB106385 (36), a potent dual A2A/A2B antagonist identified from in-house screening efforts. Compound 36 exhibits high potency at both receptors, favorable drug-like properties, and limited CNS penetration. In preclinical studies, it demonstrated robust pharmacokinetics across species and significant efficacy in a multiday CT26 mouse colon carcinoma model. These findings supported the advancement of INCB106385 into Phase 1 clinical trials (NCT04580485, NCT04989387) for cancer immunotherapy.
Insights
A new drug, INCB106385, targets adenosine receptors to enhance cancer immunotherapy. This potent dual antagonist shows promise in preclinical models, advancing to Phase 1 clinical trials.
Area of Science:
- Oncology
- Immunology
- Pharmacology
Background:
- Immune checkpoint suppression allows tumor cells to evade immune responses.
- Adenosine in the tumor microenvironment activates A2A receptors, hindering immune function.
- Existing A2A antagonists may lack sufficient potency against high local adenosine levels.
Purpose of the Study:
- To discover and characterize a novel dual A2A/A2B adenosine receptor antagonist.
- To evaluate the preclinical efficacy and pharmacokinetic properties of the novel compound INCB106385.
- To support the clinical development of INCB106385 for cancer immunotherapy.
Main Methods:
- In-house screening to identify dual A2A/A2B antagonists.
- In vitro and in vivo preclinical studies to assess compound properties and efficacy.
- Pharmacokinetic and pharmacodynamic assessments across multiple species.
Main Results:
- Discovery of INCB106385 (compound 36), a potent dual A2A/A2B antagonist.
- INCB106385 demonstrated favorable drug-like properties and limited central nervous system penetration.
- Significant efficacy was observed in a CT26 mouse colon carcinoma model with robust pharmacokinetics.
Conclusions:
- INCB106385 is a potent dual A2A/A2B antagonist with promising preclinical results.
- The compound's properties support its advancement into Phase 1 clinical trials for cancer immunotherapy.
- Targeting adenosine receptors offers a potential strategy to overcome immune suppression in cancer.
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