KJ Pyr 9
Based on 7 publication(s) in Google Scholar
KJ Pyr 9 is an inhibitor of MYC with a Kd of 6.5 nM in in vitro assay.
For research use only. We do not sell to patients.
- Purity: 99.24%
- CAS No.: 581073-80-5
- Formula: C22H15N3O4
- Molecular Weight:385.37
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 2 years , -20°C, 1 year
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Protocol
- Purity & Documentation
- References
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Help & FAQs
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Publications Citing Use of MedChemExpress (MCE) KJ Pyr 9
More- Nature. 2024 Jun;630(8018):968-975. [Abstract]
- Nat Genet. 2024 Apr;56(4):663-674. [Abstract]
- Cell Mol Immunol. 2022 Sep;19(9):1030-1041. [Abstract]
- Cancer Res. 2025 Sep 10. [Abstract]
- J Exp Med. 2023 Nov 6;220(11):e20211743. [Abstract]
- Cell Rep Med. 2023 Apr 18;4(4):101002. [Abstract]
- bioRxiv. 2023.
Biological Activity
Kd: 6.5±1.0 nM (MYC)[1]
KJ Pyr 9 (KJ-Pyr-9) interferes with MYC-MAX complex formation in the cell in a protein fragment complementation assay[1].
KJ Pyr 9 specifically inhibits MYC-induced oncogenic transformation in cell culture and has no or only weak effects on the oncogenic activity of several unrelated oncoproteins[1].
KJ Pyr 9 preferentially interferes with the proliferation of MYC-overexpressing human and avian cells and specifically reduces the MYC-driven transcriptional signature[1].
KJ Pyr 9 against three cell lines (NCI-H460, MDA-MB-231, and SUM-159PT) is tested known to be dependent on increased MYC activity[1].
KJ Pyr 9 can inhibit the proliferation of all cell lines with IC50 values between 5 and 10 μM[1].
KJ Pyr 9 is more sensitive (IC50 values between 1 and 2.5 μM) for the proliferation of Burkitt lymphoma cell lines with constitutively high expression of c-MYC[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 581073-80-5
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Appearance Solid
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Molecular Weight 385.37
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Formula C22H15N3O4
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Color Light yellow to yellow
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SMILES
O=C(N)C1=CC=C(C2=CC(C3=CC=CO3)=NC(C4=CC=C([N+]([O-])=O)C=C4)=C2)C=C1
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 2 years -20°C 1 year
Publications (7)
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Journal Impact Factor
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Most Recent
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Nature
2024 Jun;630(8018):968-975. PMID: 38867043 -
Nat Genet
MYC activity at enhancers drives prognostic transcriptional programs through an epigenetic switch. [Abstract]2024 Apr;56(4):663-674. PMID: 38454021 -
Cell Mol Immunol
2022 Sep;19(9):1030-1041. PMID: 35962189 -
Cancer Res
SWI/SNF Functions as a Gatekeeper of Enhancer Chromatin Access to Control Progression of Mesenchymal Triple-Negative Breast Cancer. [Abstract]2025 Sep 10. PMID: 40928937 -
J Exp Med
2023 Nov 6;220(11):e20211743. PMID: 37642941 -
Cell Rep Med
N-acetylcysteine overcomes NF1 loss-driven resistance to PI3Kα inhibition in breast cancer. [Abstract]2023 Apr 18;4(4):101002. PMID: 37044095 -
Solvent & Solubility
DMSO : 125 mg/mL (324.36 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
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 90% (20% SBE-β-CD in Saline)
Solubility: 2.5 mg/mL (6.49 mM); Suspended solution; Need ultrasonic
This protocol yields a suspended solution of 2.5 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 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.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: 2.08 mg/mL (5.40 mM); Suspended solution; Need ultrasonic
This protocol yields a suspended solution of 2.08 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 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.
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.
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.
Protocol
Assays used staining with the redox dye resazurin to measure cell viability. Cells are seeded at 103 per 100 μL well in 96-well plates and grown in the presence of 2.5% FBS. MDA-MB-231 cells are cultured in DMEM; SUM-159PT cells are cultured in HAM’s F12; and NCI-H460 cells are cultured in RPMI-1640. MDA-MB-231 cells are exposed to KJ Pyr 9 (KJ-Pyr-9) for 216 h with fresh compound-containing medium supplied at 120 and 192 h; SUM-159PT cells are exposed to the compound for 120 h and fresh medium with the appropriate compound concentrations is supplied at 48 h; and NCI-H460 cells are grown with compound for 72 h. Triplicate cultures of P493-6 cells are grown in six-well plates from a starting density of 1×105 cells per mL in 4 mL culture medium per well. Compounds are added immediately following cell seeding. Following compound addition, cells are distributed by vortexing the plate at 400 rpm for 10 s. One hundred-microliter samples are taken after vortexing and counted using a Beckman Coulter Z1 counter at 0, 12, 24, 36, 48, 60, 72, and 96 h of incubation[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Mice[1]
Ten 8-wk-old female nude mice (HSD:athymic nude-Foxn1nu) are injected with 5×106 MDA-MB-231 cells s.c. into the left and right flanks. Cells are suspended in high-concentration Matrigel before injection. Xenograft tumors are allowed to grow until the average volume of the tumors reached 100 mm3, as measured by external calipers. At this point, the mice are divided into two groups. One receive 10 mg/kg KJ Pyr 9 and the other receive vehicle only, dosed daily by i.p. injection. Tumor volume and mouse weight are measured daily. Vehicle used in all cases is 10:10:80 Tween 80:DMSO:5% dextrose in water. The mice are treated for a period of 31 d. At the end of the experiment, the mice are euthanized and tumors are excised. Tumors are weighed. Samples of each tumor are fixed in formalin for histology and frozen for Western blotting.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Purity & Documentation
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Data Sheet (278 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 2.5949 mL | 12.9745 mL | 25.9491 mL | 64.8727 mL |
| 5 mM | 0.5190 mL | 2.5949 mL | 5.1898 mL | 12.9745 mL | |
| 10 mM | 0.2595 mL | 1.2975 mL | 2.5949 mL | 6.4873 mL | |
| 15 mM | 0.1730 mL | 0.8650 mL | 1.7299 mL | 4.3248 mL | |
| 20 mM | 0.1297 mL | 0.6487 mL | 1.2975 mL | 3.2436 mL | |
| 25 mM | 0.1038 mL | 0.5190 mL | 1.0380 mL | 2.5949 mL | |
| 30 mM | 0.0865 mL | 0.4325 mL | 0.8650 mL | 2.1624 mL | |
| 40 mM | 0.0649 mL | 0.3244 mL | 0.6487 mL | 1.6218 mL | |
| 50 mM | 0.0519 mL | 0.2595 mL | 0.5190 mL | 1.2975 mL | |
| 60 mM | 0.0432 mL | 0.2162 mL | 0.4325 mL | 1.0812 mL | |
| 80 mM | 0.0324 mL | 0.1622 mL | 0.3244 mL | 0.8109 mL | |
| 100 mM | 0.0259 mL | 0.1297 mL | 0.2595 mL | 0.6487 mL |
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