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CDK9 inhibitor HH1

Cat No.:V55103 Purity: ≥98%
CDK9 inhibitor HH1 is a potent and specific CDK9 inhibitor.
CDK9 inhibitor HH1
CDK9 inhibitor HH1 Chemical Structure CAS No.: 204188-41-0
Product category: CDK
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
CDK9 inhibitor HH1 is a potent and specific CDK9 inhibitor. CDK9 inhibitor HH1 inhibits CDK transcription. CDK9 inhibitor HH1 could be used in cancer research.
CDK9 inhibitor HH1 (CAS 204188-41-0) is a novel potent and highly selective CDK9 inhibitor. Its molecular formula is C13H15N3OS with a molecular weight of 261.34 g/mol. CDK9 inhibitor HH1 inhibits CDK transcription. It can be used in cancer research. The compound is a small molecule that targets cyclin-dependent kinase 9 (CDK9), an enzyme involved in regulating transcription elongation. It is under investigation for its potential to treat various cancers, including hematological malignancies.
Biological Activity I Assay Protocols (From Reference)
Targets
CDK9
CDK9 inhibitor HH1 targets cyclin-dependent kinase 9 (CDK9). CDK9 is a key regulator of transcription elongation, particularly for genes involved in cell proliferation and survival. By inhibiting CDK9, the compound blocks transcription and reduces the expression of anti-apoptotic proteins. The compound is a potent and highly selective CDK9 inhibitor. It inhibits CDK transcription.
ln Vitro
In cell-free biochemical assays, CDK9 inhibitor HH1 inhibits CDK9 kinase activity. The compound's inhibition of CDK9 can be assessed using in vitro kinase assays with purified CDK9-cyclin T complex. The compound's selectivity for CDK9 over other CDKs can be assessed using kinase profiling assays. The compound is an inhibitor of the human CDK2-cyclin A2 complex with an IC50 value of 2 μM.
ln Vivo
In cell-based assays, CDK9 inhibitor HH1 inhibits CDK9 activity, leading to the inhibition of transcription and reduced expression of anti-apoptotic proteins. The compound's effects are evaluated in cancer cell lines, particularly hematological malignancies. By inhibiting CDK9, the compound induces apoptosis in cancer cells. The compound can be used in cancer research.
Enzyme Assay
The cell-free assay for CDK9 inhibition involves measuring the kinase activity of purified CDK9-cyclin T complex in the presence of the compound. The assay uses a peptide substrate and ATP, and the phosphorylation of the substrate is measured using radioactivity, fluorescence, or luminescence. The IC50 is determined from dose-response curves. The compound's selectivity for CDK9 can be assessed by testing against other CDKs.
Cell Assay
Cell-based assays for CDK9 inhibitor HH1 involve culturing cancer cell lines, particularly hematological malignancies, and treating them with the compound at concentrations ranging from 0.01 to 10 μM. Cells are incubated for 24-72 hours, and cell viability is assessed using MTT or CCK-8 assays. The compound's effects on transcription are assessed by measuring the expression of CDK9 target genes by qRT-PCR. Apoptosis is evaluated by Annexin V staining or caspase activity assays.
Animal Protocol
In animal models, CDK9 inhibitor HH1 has been evaluated for its anti-tumor activity in models of hematological malignancies and other cancers. Typical studies involve administration of the compound to tumor-bearing mice via intraperitoneal or oral routes. Tumor volumes are measured, and tissues are collected for analysis of CDK9 inhibition, transcription inhibition, and apoptosis. Efficacy is assessed by tumor growth inhibition.
ADME/Pharmacokinetics
Pharmacokinetic properties of CDK9 inhibitor HH1 have not been extensively reported. As a small molecule with a molecular weight of 261.34 g/mol, the compound would be expected to have moderate oral bioavailability and tissue penetration. The compound is typically stored as powder at -20°C for 3 years or in solvent at -80°C for 6 months. Further pharmacokinetic studies would be required.
Toxicity/Toxicokinetics
CDK9 inhibitor HH1 is intended for research use only and lacks established toxicity profiles for therapeutic applications. Standard laboratory safety precautions should be observed when handling this chemical reagent. As a CDK9 inhibitor, the compound may have effects on normal cells as well as cancer cells. Standard toxicity studies in rodents would be required to determine the safety profile.
References

[1]. Selective CDK9 Inhibition by Natural Compound Toyocamycin in Cancer Cells. Cancers (Basel). 2022 Jul 8;14(14):3340.

Additional Infomation
CDK9 inhibitor HH1 is a research-grade compound supplied for cancer research. It is not an approved pharmaceutical and has no clinical trial history. The compound is a potent and highly selective CDK9 inhibitor. It inhibits CDK transcription and can be used in cancer research. This product is intended for research use only.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C13H15N3OS
Molecular Weight
261.34
Exact Mass
261.093
CAS #
204188-41-0
PubChem CID
15323467
Appearance
Light yellow to yellow solid powder
Density
1.3±0.1 g/cm3
Boiling Point
453.4±55.0 °C at 760 mmHg
Flash Point
228.0±31.5 °C
Vapour Pressure
0.0±1.1 mmHg at 25°C
Index of Refraction
1.657
LogP
1.73
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
5
Rotatable Bond Count
4
Heavy Atom Count
18
Complexity
292
Defined Atom Stereocenter Count
0
SMILES
CC(C)NC1=NC(=C(S1)C(=O)C2=CC=CC=C2)N
InChi Key
WHJIFFVMTRXENN-UHFFFAOYSA-N
InChi Code
InChI=1S/C13H15N3OS/c1-8(2)15-13-16-12(14)11(18-13)10(17)9-6-4-3-5-7-9/h3-8H,14H2,1-2H3,(H,15,16)
Chemical Name
[4-amino-2-(propan-2-ylamino)-1,3-thiazol-5-yl]-phenylmethanone
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 3.8264 mL 19.1322 mL 38.2643 mL
5 mM 0.7653 mL 3.8264 mL 7.6529 mL
10 mM 0.3826 mL 1.9132 mL 3.8264 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

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  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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