ido/tdo-in-1

IDO/TDO-IN-1 is an orally active dual indoleamine-2,3-dioxygenase (IDO) and tryptophan 2,3-dioxygenase (TDO) inhibitor (IC50s: 9.7 and 47 nM).

(R)-IDO/TDO-IN-1 (compound 25), an indoleamine-2,3-dioxygenase (IDO) inhibitor, demonstrates good pharmacokinetic properties and exerts anti-tumor effects in the MC38 xenograft model. This compound exhibits synergy when combined with the anti-PD-1 monoclonal antibody (SHR-1210) [1].

IDO1/TDO-IN-1 (30) is a highly effective inhibitor of IDO1 and TDO enzymes, acting through uncompetitive (Ki = 0.23 μM) and competitive (Ki = 0.73 μM) mechanisms, respectively. This compound exhibits significant capacity to induce cell apoptosis via the potential mitochondria-mediated Bcl-2/Bax pathway [1].

IDO/Tubulin-IN-2 (HT2) is a potent inhibitor of TDO and tubulin, showing significant efficacy against cancer cell lines U87, HepG2, A549, HCT-116, and LO2, with respective IC50 values of 0.43, 0.036, 0.041, 0.095, and 1.04 μM. Additionally, IDO/Tubulin-IN-2 markedly enhances antitumor activity [1].