INCB024360 is a potent IDO1 inhibitor (IC50 value of 10 nM) with desirable pharmaceutical properties, is poised to start clinical trials in cancer patients. In cellular assays, INCB024360 selectively inhibits human IDO1 with IC(50) values of approximately 10nM, demonstrating little activity against other related enzymes such as IDO2 or tryptophan 2,3-dioxygenase (TDO).
In vivo: In mice bearing GM-CSF-secreting B16 tumors, INCB024360 (75 mg/kg b.i.d) causes dose dependent inhibition of tumor growth. INCB024360 significantly suppresses tumor growth in immunocompetent, but not immunodeficient, mice.
In vitro: In HeLa cells, INCB024360 shows higher inhibitory activity on IDO1 with IC50 of 19 nM. In coculture systems of human allogeneic lymphocytes with dendritic cells or tumor cells, INCB024360, via IDO1 inhibition, reverses T-cell suppression mediated by IDO-expressing HeLa cells or DCs, and increases the proliferation and functional activity of CD4+ T cells, CD8+ T cells, and NK cells.
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Cell lines | |
Preparation method | |
Concentrations | |
Incubation time |
Animal Experiment | |
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Animal models | Mice bearing GM-CSF-secreting B16 tumors |
Formulation | 5% DMA, 47.5% propylene glycol |
Dosages | 75 mg/kg b.i.d |
Administration | s.c. |
Molecular Weight | 271.64 |
Formula | C9H7ClFN5O2 |
CAS Number | 914471-09-3 |
Solubility (25°C) | DMSO >13.6 mg/mL |
Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
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IDO1-IN-21 is an IDO1 inhibitor (IC50 = 0.64 μM). |
IDO1-IN-22
IDO1-IN-22 is a IDO1 inhibitor (biochemical hIDO1 IC50: 67.4 nM, HeLa hIDO1 IC50: 17.6 nM). |
IDO1/TDO-IN-6
IDO1/TDO-IN-6 is a dual inhibitor of IDO1/TDO with IC50s of 2.25 and 2.89 μM, respectively. |
IDO-IN-13
IDO-IN-13 is a potent indoleamine 2,3-dioxygenase 1 (IDO1) inhibitor with an EC50 of 17 nM, extracted from patent WO2019040102A1, example 43. |
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