msa-2 dimer

MSA-2 dimer, a selective and orally active non-nucleotide STING agonist with a dissociation constant (Kd) of 145 μM, demonstrates prolonged antitumor and immunogenic activity. It non-covalently binds to STING as a dimer, showing greater permeability compared to cyclic dinucleotide[1].

MSA-2 is an orally available non-nucleotide STING agonist. The non-covalent dimer of MSA-2 binds to STING with nanomolar affinity. It shows anti-tumor activity in syngeneic mouse tumor models, synergizes with anti-PD-1, stimulates tumor secretion of interferon-β, induces tumor regression, and has long-lasting anti-tumor immunity. [3]

STINGagonist-47 is a STING agonist with an EC50 of 0.72 μM and a Kd of 176 nM. It is a dimer of MSA-2 and is applicable in cancer research, including studies on breast cancer.