Camonsertib
Based on 3 publication(s) in Google Scholar
Camonsertib (RP-3500) is an orally active, selective ATR kinase inhibitor (ATRi) with an IC50 of 1.00 nM in biochemical assays. Camonsertib shows 30-fold selectivity for ATR over mTOR (IC50=120 nM) and >2,000-fold selectivity over ATM, DNA-PK, and PI3Kα kinases. Camonsertib has potent antitumor activity.
For research use only. We do not sell to patients.
- Purity: 99.99%
- CAS No.: 2417489-10-0
- Formula: C21H26N6O3
- Molecular Weight:410.47
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Storage:
4°C, sealed storage, away from moisture and light
* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Publications Citing Use of MedChemExpress (MCE) Camonsertib
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Biological Activity
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ATR |
ATM >30 μM (IC50) |
mTOR 120 nM (IC50) |
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Cell Line
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Type | Value | Description | References |
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| LoVo | IC50 |
28 nM
Compound: 30; RP-3500
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Cytotoxicity against human LoVo cells assessed as reduction in cell viability incubated for 5 days by CellTiter-Glo assay
Cytotoxicity against human LoVo cells assessed as reduction in cell viability incubated for 5 days by CellTiter-Glo assay
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[PMID: 38299539] |
Camonsertib (RP-3500; 1 μM; 1-24 hours) inhibits CHK1(Ser345) phosphorylation from 1 to 3 hours[1].
Camonsertib inhibits Gemcitabine stimulated ATR phosphorylation of its substrate pCHK1(Ser345) with an IC50 of 0.33 nM in a LoVo cell-based assay[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Cell Line:LoVo and CW-2 human colon cancer cell lines
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Concentration:1 μM
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Incubation Time:1, 2, 4, 6, 8, 16, 24 hours
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Result:Inhibited CHK1(Ser345) phosphorylation from 1 to 3 hours. Starting at 4 hours, CHK1(Ser345) became re-phosphorylated as DNA-PKcs became activated in treated cells, along with its substrates KAP1 and H2AX.
Camonsertib (5, 10 mg/kg; Orally; once daily) produces statistically significant tumor growth inhibition in the CW-2 colon xenograft model[1].
Camonsertib (7 mg/kg; for 7 days) results in 8.1- and 2.7-fold inductions of KAP1 and DNA-PKcs phosphorylation in mice bearing LoVo tumors[1].
Camonsertib has a more profound anti-tumor effect occurred at higher doses on the 3 days on/4 days off (30 mg/kg) and 5 days on/2 days off (25 mg/kg) schedules compared with consecutive daily administrations (10 mg/kg) at a lower dose for 14 days[1].
Camonsertib (15mg/kg) combined PARPi Olaparib (80mg/kg; both agents days 1-3 on/4 days off) or sequential (PARPi for 3 days followed by RP-3500 for 3 days then 1 day off) schedules produces greater antiTumor effects compared with sequential administration without affecting tolerability[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Animal Model:Female mice (6-8 weeks old) bearing LoVo xenografts[1]
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Dosage:3, 7, 15 mg/kg (0.5% methylcellulose/0.02% SDS vehicle)
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Administration:Orally; once daily for 18 days
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Result:Produced dose-dependent tumor growth inhibition with a minimum effective dose (MED) of 7 mg/kg.
The maximum tolerated dose (MTD) was 10 mg/kg once daily on a continuous dosing schedule.
| NCT Number | Sponsor | Condition | Start Date |
Phase
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|---|---|---|---|---|
| NCT01329991 | Plexxikon| | 2011-05 | PHASE1 |
Chemical Information
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CAS No. 2417489-10-0
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Appearance Solid
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Molecular Weight 410.47
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Formula C21H26N6O3
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Color Off-white to light yellow
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SMILES
O[C@@]1(C[C@H]2O[C@H](CC2)C1)C3=C4C(N(C5=NNC=C5)N=C4)=NC(N6[C@@H](COCC6)C)=C3
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Synonyms
RP-3500; ATR inhibitor 4
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, sealed storage, away from moisture and light
* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)
Publications (3)
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Journal Impact Factor
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Most Recent
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Cancer Lett
2026 Apr 1:642:218300. PMID: 41651400 -
Br J Cancer
Targeting the DNA damage response prevents regrowth of colorectal peritoneal metastasis-derived organoids following treatment with mitomycin C. [Abstract]2026 Mar;134(5):831-842. PMID: 41491222
Solvent & Solubility
DMSO : 50 mg/mL (121.81 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 1.25 mg/mL (3.05 mM); Clear solution
This protocol yields a clear solution of ≥ 1.25 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (12.5 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 1.25 mg/mL (3.05 mM); Clear solution
This protocol yields a clear solution of ≥ 1.25 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (12.5 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL. * In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
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Data Sheet (285 KB)
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SDS (252 KB)
- English - EN (252 KB)
- Français - FR (252 KB)
- Deutsch - DE (252 KB)
- Norwegian - NO (252 KB)
- Español - ES (252 KB)
- Swedish - SV (252 KB)
- Italian - IT (252 KB)
- Korean - KR (252 KB)
- Portuguese - PT (252 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
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| DMSO | 1 mM | 2.4362 mL | 12.1812 mL | 24.3623 mL | 60.9058 mL |
| 5 mM | 0.4872 mL | 2.4362 mL | 4.8725 mL | 12.1812 mL | |
| 10 mM | 0.2436 mL | 1.2181 mL | 2.4362 mL | 6.0906 mL | |
| 15 mM | 0.1624 mL | 0.8121 mL | 1.6242 mL | 4.0604 mL | |
| 20 mM | 0.1218 mL | 0.6091 mL | 1.2181 mL | 3.0453 mL | |
| 25 mM | 0.0974 mL | 0.4872 mL | 0.9745 mL | 2.4362 mL | |
| 30 mM | 0.0812 mL | 0.4060 mL | 0.8121 mL | 2.0302 mL | |
| 40 mM | 0.0609 mL | 0.3045 mL | 0.6091 mL | 1.5226 mL | |
| 50 mM | 0.0487 mL | 0.2436 mL | 0.4872 mL | 1.2181 mL | |
| 60 mM | 0.0406 mL | 0.2030 mL | 0.4060 mL | 1.0151 mL | |
| 80 mM | 0.0305 mL | 0.1523 mL | 0.3045 mL | 0.7613 mL | |
| 100 mM | 0.0244 mL | 0.1218 mL | 0.2436 mL | 0.6091 mL |
Camonsertib Related Classifications
HY-139609 Related Classifications
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