Consistent with preclinical results, inhibition of A2ARs using ciforadenant in combination with programmed death 1 ligand 1 (PD-L1) blockade using atezolizumab induces clinical responses in patients with mCRPC. Moreover, inhibiting A2ARs results in a significant decrease in SPP1hi-TAM abundance in CRPC, indicating that this pathway is involved in both induction and downstream immunosuppression. Collectively, these findings establish SPP1hi-TAMs as key mediators of ICI resistance in mCRPC through adenosine signalling, emphasizing their importance as both a therapeutic target and a potential biomarker for predicting treatment efficacy.
These effects may play a substantial role in delaying progression in end-stage patients. Additional work is ongoing to demonstrate this new mechanism of action across clinical settings and patient populations.
In vivo, M1069 decreased tumor growth as a monotherapy and enhanced anti-tumor activity of bintrafusp alfa (BA) or cisplatin in syngeneic adenosinehi/CD73hi 4T1 breast tumor model, but not in the CD73 knockout (KO) 4T1 tumor model or in adenosinelow/CD73low MC38 murine colon carcinoma model. In summary, our dual A2A/A2B AR antagonist M1069 may counteract immune-suppressive mechanisms of high concentrations of adenosine in vitro and in vivo and enhance the anti-tumor activity of other agents, including BA and cisplatin.
P1, N=77, Active, not recruiting, Arcus Biosciences, Inc. | Trial completion date: Aug 2024 --> Nov 2024 | Trial primary completion date: Aug 2024 --> Nov 2024
5 months ago
Trial completion date • Trial primary completion date
We further demonstrated the pro-tumor effect of CGRP by feeding mice with the clinically approved CGRP receptor antagonist rimegepant which inhibited the activation of ERK and YAP. Finally, we diminished the impact of CGRP on OSCC with istradefylline, a clinically available drug that targets neuronal A2AR. Therefore, we established trigeminal A2AR-mediated CGRP release as a promising druggable circuit in OSCC treatment.
Lead candidate TB206-001 displayed nanomolar binding of hA2AR-overexpressing HEK293 cells; cross-reactivity with mouse and cynomolgus A2AR but not human A1, A2B, or A3 receptors; functional antagonism of hA2AR in hA2AR-overexpressing HEK293 cells and peripheral blood mononuclear cells (PBMCs); and tumor-suppressing activity in colon tumor-bearing HuCD34-NCG mice. Given its therapeutic properties, TB206-001 is a good candidate for incorporation into next-generation bispecific immunotherapeutics.
P1/2, N=24, Active, not recruiting, M.D. Anderson Cancer Center | Recruiting --> Active, not recruiting | Phase classification: P1b/2 --> P1/2 | N=15 --> 24
P2, N=151, Active, not recruiting, Arcus Biosciences, Inc. | Trial completion date: Feb 2024 --> Feb 2025 | Trial primary completion date: Feb 2024 --> Feb 2025
1 year ago
Trial completion date • Trial primary completion date • Combination therapy
Exploratory objective is to evaluate progression-free and overall survival. Interim analysis for futility and safety occurs in cohorts of 5 patients and is performed based on Bayesian sequential methods.