PRX-08066 Maleic acid
For research use only.
CAS No. 866206-55-5
PRX-08066 Maleic acid is a selective 5-HT2B receptor antagonist with IC50 of 3.4 nM, prevents the severity of pulmonary arterial hypertension in the MCT rat model. Phase 2.
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The HTR2B antagonist PRX-08066 reduced the viability of UM metastatic cell lines. MTS cell viability assays were performed 72 h post-treatment with PRX-08066. Increasing concentrations of PRX-08066 (5, 10, 20, 50 and 100 µM) were tested on UM metastatic cell lines T111, T128 and T131 (a). The 20 µM concentration was tested on UM non-metastatic cell lines (T108, T130 and T143) and normal uveal melanocytes (NUM; b). Data are represented as relative percentage of viability using a column bar graph (mean±SEM). The absorbance of untreated cells (black bars) was considered as 100%. Student t test, *P<0.05
Clinical & Experimental Metastasis, 2018, https://doi.org/10.1007/s10585-018-9894-x. PRX-08066 Maleic acid purchased from Selleck.
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Choose Selective 5-HT Receptor Inhibitors
|Description||PRX-08066 Maleic acid is a selective 5-HT2B receptor antagonist with IC50 of 3.4 nM, prevents the severity of pulmonary arterial hypertension in the MCT rat model. Phase 2.|
|Features||A selective 5-HT2BR antagonist and high selectivity over the closely related 5-HT2A and 5-HT2C receptors and other receptor targets.|
PRX-08066 inhibits 5-HT-induced mitogen-activated protein kinase activation with IC50 of 12 nM and markedly reduces thymidine incorporation with IC50 of 3 nM in Chinese hamster ovary cells expressing the human 5-HT2BR, which suggests that PRX-08066 can potentially inhibit the pathologic 5-HT-induced vascular muscularization associated with PAH.  PRX-08066 inhibits cell proliferation with IC50 of 0.46 nM and with a maximum inhibition of 20% and 5-HT secretion with IC50 of 6.9 nM with a maximum inhibition of 30% in the 5-HT(2B) expressing SI-NET cell line, KRJ-I. PRX-08066 inhibits isoproterenol-stimulated 5-HT release with IC50 of 1.25 nM and a maximum inhibition of 60% in NCI-H720 cells. PRX-08066 (0.5 nM) significantly inhibits ERK phosphorylation in KRJ-I cells. PRX-08066 inhibits TGFβ1, CTGF and FGF2 transcription and secretion in KRJ-I cells. PRX-08066 decreases level of transcripts for Ki67 (84%) as well as Ki67 protein (36.8%) associated with an increase in caspase 3 transcript levels in KRJ-I cells. PRX-08066 decreases level of transcripts of TGFβ1, FGF2 and TPH1 in KRJ-I cells. PRX-08066 significantly increases the number of dead cells (34%) compared with untreated controls in KRJ-I cells. PRX-08066 causes a significant increase in dead/caspase 3 positive cells (76%) and caspase 3 activity (52%) in HEK293 cells. 
|In vivo||PRX-08066 (100 mg/kg) treated groups demonstrates less right ventricular hypertrophy and septal flattening than the monocrotaline control group in rats. PRX-08066 significantly reduces peak pulmonary artery pressure at 50 mg/kg and 100 mg/kg compared with monocrotaline control rats. PRX-08066 also significantly reduces right ventricle (RV)/body weight and RV/left ventricle + septum, compared with MCT-treated rats. PRX-08066 significantly attenuates the elevation in pulmonary artery pressure and RV hypertrophy and maintains cardiac function. PRX-08066 significantly reduces the hypoxia-dependent increase in right ventricular systolic pressure in both rats and mice without affecting the systemic mean arterial pressure in the animals.  PRX-08066 (100 mg/kg) significantly inhibits both right ventricular systolic pressure and right ventricular/left ventricular +septum weight elevations in rats. PRX-08066 (30 mg/kg) inhibits right ventricular systolic pressure and monocrotaline-induced ERK phosphorylation in whole lung homogenates in rats. |
|Cell Research: ||
|In vitro||DMSO||104 mg/mL (200.78 mM)|
|Water||104 mg/mL (200.78 mM)|
|Ethanol||98 mg/mL (189.2 mM)|
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