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PT2399 is a potent and orally available antagonist of HIF-2 with an IC50 of 6 nM, PT2399 selectively disrupts the heterodimerization of HIF-2α with HIF-1β. PT2399 dissociates HIF-2 (an obligatory heterodimer [HIF-2α/HIF-1β])14 in human Clear cell Renal Cell Carcinoma (ccRCC) suppressing tumorigenesis in 56% (10/18) lines. PT2399 (20 μM) causes off-target toxicity because it inhibits the proliferation of HIF-2α −/− 786-O cells and other cancer cell lines with undetectable HIF-2α. PT2399 (0.2-2 μM; 0-21 days) inhibits 786-O cells soft agar growth.
PT2399 reduces tumor cell density and increases fibrosis in RCC bearing mice. PT2399 (100 mg/kg; oral gavage; every 12 hours) is more active than SU 11248, and inhibits tumor growth in several SU 11248-resistant tumors in RCC bearing mice.
| Cell Experiment | |
|---|---|
| Cell lines | 786-O cells |
| Preparation method | PT2399 inhibited 786-O cell soft agar growth at 0.2-2 μM. |
| Concentrations | 0 μM, 0.2 μM, 2 μM |
| Incubation time | 0-21 days |
| Animal Experiment | |
|---|---|
| Animal models | Mice with RCC tumorgraft |
| Formulation | in 10% EtOH, 30% PEG400, 60% MCT |
| Dosages | 100 mg/kg |
| Administration | oral gavage every 12 hours |
| Molecular Weight | 419.32 |
| Formula | C17H10F5NO4S |
| CAS Number | 1672662-14-4 |
| Solubility (25°C) | DMSO 90 mg/mL |
| Storage | -20°C, sealed |
[2] Wenfang Chen, et al. Nature. Targeting renal cell carcinoma with a HIF-2 antagonist
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2-methoxyestradiol (2-ME2), an endogenous metabolite of 17β -estradiol (E2) with oral activity, is an apoptosis inducer and angiogenesis inhibitor with effective antitumor activity. Methoxyestradiol can also destabilize microtubules. Methoxyestradiol is a potent inhibitor of superoxide dismutase (SOD) and reactive oxygen species (ROS) that can induce autophagy in transformed cell line HEK293, cancer cell line U87 and HeLa. |
| DMOG
DMOG (Dimethyloxaloyl glycine) is an antagonist of α-ketoglutarate cofactor and a cell permeable and competitive inhibitor of HIF-PH, which results in HIF-1α stabilisation and accmulation in vitro and in vivo. DMOG acts as a pro-angiogenic agent and plays a protective role in experimental model of colitis and diarrhoea via HIF-1 related signal. DMOG induces cell autophagy. |
| IOX2
IOX2 is a potent inhibitor of HIF-1α prolyl hydroxylase-2 (PHD2) with IC50 of 21 nM, >100-fold selectivity over JMJD2A, JMJD2C, JMJD2E, JMJD3, or the 2OG oxygenase FIH. |
| Hydralazine hydrochloride
Hydralazine hydrochloride is a hydrochloride salt of hydralazine (Apresoline) that is a direct-acting smooth muscle relaxant with an IC50 of 1.9 mM. |
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