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KGP94

Cat No.:V23219 Purity: ≥98%
KGP94 is a novel, potent, reversible, time-dependent and competitive inhibitor of human cysteine protease Cathepsin L inhibitor(CTSL).
KGP94
KGP94 Chemical Structure CAS No.: 1131456-28-4
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
5mg
10mg
25mg
50mg
100mg
250mg
Official Supplier of:
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Product Description

KGP94 is a novel, potent, reversible, time-dependent and competitive inhibitor of human cysteine protease Cathepsin L inhibitor(CTSL). It inhibits the activity of cathepsin L toward human type I collagen. KGP94 significantly impedes both migration and invasion of MDA-MB-231 human breast cancer cells. Molecular modeling places the thiocarbonyl of KGP94 in proximity to the active site Cys25. Significant growth retardation of C3H mouse mammary carcinomas is achieved with KGP94 treatment [1,2]. KGP94 treatment led to marked attenuation of tumor cell invasion and migration under both normal and aberrant microenvironmental conditions suggesting that it may have significant utility as an anti-metastatic agent. [3]

Biological Activity I Assay Protocols (From Reference)
ln Vitro
KGP94 (10 or 20 μM, 24 hours) decreases cell invasion of primary bone marrow-derived macrophages or Raw264.7 as well as the expression of M2 (macrophage) markers (Arginase-1 and CD206)[3]. Prostate cancer cells' and breast cancer cells' ability to invade is reduced by 53% and 88%, respectively, by KGP94 (25 μM, 24 hours) [4]. In PC-3ML and MDA-MB-231, KGP94 (25 μM, 24 hours) reduced secreted CTSL activity by 94% and 92%, respectively [4]. Assay for cell invasion[4]
ln Vivo
In a prostate cancer bone metastasis model, KGP94 (ip; 20 mg/kg; once daily for three days) demonstrates anti-metastatic and anti-bone resorbtive effects [5].
Cell Assay
Cell invasion assay[4]
Cell Types: PC-3ML, MDA-MB-231
Tested Concentrations: 10 μM, 25 μM
Incubation Duration: 24 hrs (hours)
Experimental Results: Attenuated migration and invasion of prostate and breast cancer cells.
Animal Protocol
Animal/Disease Models: NCR nu/nu male mice [5]
Doses: 20 mg/kg
Route of Administration: intraperitoneal (ip) injection; one time/day for 3 days
Experimental Results: Metastatic tumor load was diminished by 65%, tumor angiogenesis was diminished by 58%, and increased Survival rate of mice with bone metastasis.
References

[1]. Synthesis and biological evaluation of a water-soluble phosphate prodrug salt and structural analogues of KGP94, a lead inhibitor of cathepsin L. Bioorg Med Chem Lett. 2017 Mar 1. 27(5):1304-1310.

[2]. An efficient and concise synthesis of a selective small molecule non-peptide inhibitor of cathepsin L: KGP94. Bioorg Chem. 2021 Nov. 116:105317.

[3]. Cathepsin L secretion by host and neoplastic cells potentiates invasion. Oncotarget. 2019 Sep 17. 10(53):5560-5568.

[4]. Cathepsin L inhibition by the small molecule KGP94 suppresses tumor microenvironment enhanced metastasis associated cell functions of prostate and breast cancer cells. Clin Exp Metastasis. 2013 Oct. 30(7):891-902.

[5]. Cathepsin L inactivation leads to multimodal inhibition of prostate cancer cell dissemination in a preclinical bone metastasis model. Int J Cancer. 2016 Jun 1;138(11):2665-77.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C14H12BRN3OS
Molecular Weight
350.233580589294
Exact Mass
348.988
CAS #
1131456-28-4
Related CAS #
1131456-28-4
PubChem CID
52944285
Appearance
White to off-white solid powder
LogP
3.4
Hydrogen Bond Donor Count
3
Hydrogen Bond Acceptor Count
3
Rotatable Bond Count
3
Heavy Atom Count
20
Complexity
377
Defined Atom Stereocenter Count
0
SMILES
BrC1=CC=CC(=C1)/C(/C1C=CC=C(C=1)O)=N\NC(N)=S
InChi Key
ZDBKSZKTCPOBFR-GHRIWEEISA-N
InChi Code
InChI=1S/C14H12BrN3OS/c15-11-5-1-3-9(7-11)13(17-18-14(16)20)10-4-2-6-12(19)8-10/h1-8,19H,(H3,16,18,20)/b17-13+
Chemical Name
[(Z)-[(3-bromophenyl)-(3-hydroxyphenyl)methylidene]amino]thiourea
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)
DMSO : ≥ 100 mg/mL (~285.53 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (7.14 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (7.14 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.8553 mL 14.2763 mL 28.5527 mL
5 mM 0.5711 mL 2.8553 mL 5.7105 mL
10 mM 0.2855 mL 1.4276 mL 2.8553 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

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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?
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  • 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:
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  • 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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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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