CX-5461 (Pidnarulex) is a potent small-molecule rRNA synthesis inhibitor with an IC50 of 0.11 μM. CX-5461 selectively blocks RNA PolI transcription,PIC assembly and SL1-rDNA interaction. CX-5461 indicates potent antiproliferative activity in cancer cells and induces autophagy incancer cells. CX-5461 shows potent antitumor activity in A375 and MiaPaca xenografts.
Nucleic Acids Res. 2022 Nov 28;gkac1114.
TERRA regulates DNA G-quadruplex formation and ATRX recruitment to chromatin
CX-5461 purchased from AbMole
Molecular Weight | 513.61 |
Formula | C27H27N7O2S |
CAS Number | 1138549-36-6 |
Solubility (25°C) | Water 50 mg/mL (ultrasonic and adjust pH to 2 with HCl) 50 mM sodium phosphate (pH 3.5) : 10 mg/mL (Need ultrasonic) |
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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