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Anguizole

Alias: Anguizole; 442666-98-0; DTXSID30359937; RefChem:319572; DTXCID50310989;
Cat No.:V11301 Purity: ≥98%
Anguizole is a small molecule inhibitor of HCV (hepatitis C virus) replication that changes the subcellular distribution of NS4B.
Anguizole
Anguizole Chemical Structure CAS No.: 442666-98-0
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
Anguizole is a small molecule inhibitor of HCV (hepatitis C virus) replication that changes the subcellular distribution of NS4B.
Anguizole (CAS# 442666-98-0) is a small molecule inhibitor of hepatitis C virus (HCV) replication that acts by targeting the nonstructural protein 4B (NS4B). With a molecular formula of C₁₇H₁₁ClF₂N₄O₂S and a molecular weight of 408.81 g/mol, Anguizole is a selective NS4B inhibitor with an IC₅₀ value of 310 nM. The compound targets the second amphipathic helix of NS4B (NS4B-AH2), disrupting NS4B-mediated biological functions that play an important role in the HCV life cycle. Anguizole treatment significantly disrupts NS4B-AH2-mediated functions and alters NS4B's subcellular distribution.
Biological Activity I Assay Protocols (From Reference)
Targets
The primary target of Anguizole is NS4B (nonstructural protein 4B), a viral protein found in hepatitis C virus that is a key regulator in HCV replication complex formation. NS4B plays a pivotal role in HCV replication by inducing specific membrane rearrangement and designating the membranous web. NS4B-AH2, comprising amino acids 42 to 66, is identified as a major regulator for NS4B oligomerization. Anguizole targets the second amphipathic helix of NS4B (NS4B-AH2). When tested with HCV virus, Anguizole treatment significantly disrupts NS4B-AH2-mediated biological functions, inhibiting HCV replication. The compound also disrupts NS4B's interaction with NS5A, another viral protein essential for HCV replication.
ln Vitro
In vitro, Anguizole demonstrates potent inhibition of HCV replication. The compound has an IC₅₀ value of 310 nM for NS4B inhibition. In Huh7.5 cells transfected with a plasmid expressing NS4B fused in frame with GFP, 5 µM Anguizole treatment for 48 hours altered the distribution of NS4B, inhibiting the HCV life cycle. Anguizole treatment significantly disrupts NS4B-AH2-mediated biological functions. The compound also disrupts NS4B's dimerization and multimerization as well as its interaction with NS5A, further inhibiting viral genome replication. These in vitro studies demonstrate the compound's potential as an HCV antiviral agent.
ln Vivo
In vivo, Anguizole's activity has been demonstrated in HCV replication models. The compound's ability to inhibit HCV replication makes it a promising candidate for the treatment of chronic hepatitis C infection. Anguizole targets a viral protein (NS4B) that is essential for HCV replication, potentially overcoming resistance to direct-acting antivirals that target other viral proteins. The compound's mechanism of action involves disrupting NS4B-AH2-mediated functions and NS4B-NS5A interactions. Further in vivo studies are needed to fully characterize its efficacy and safety in animal models of HCV infection.
Enzyme Assay
In vitro enzyme/receptor binding studies for Anguizole focus on its interaction with NS4B. Binding affinity to NS4B can be assessed using surface plasmon resonance (SPR) or isothermal titration calorimetry (ITC). The compound's ability to disrupt NS4B oligomerization can be evaluated using co-immunoprecipitation or crosslinking assays. NS4B-NS5A interaction assays can be performed using co-immunoprecipitation or FRET-based assays. IC₅₀ values for NS4B inhibition are determined from dose-response curves in cell-based replication assays. These methods are for research purposes only.
Cell Assay
In vitro cell-based assays for Anguizole evaluate its anti-HCV activity. Huh7.5 cells or other HCV-permissive cell lines are transfected with HCV replicons or infected with HCV virus. Cells are treated with Anguizole at various concentrations (typically 0.1-10 µM) for 24-72 hours. HCV RNA levels are measured by qRT-PCR, and HCV protein expression is assessed by Western blot or immunofluorescence. NS4B subcellular distribution is examined by fluorescence microscopy. Cell viability is assessed using MTT or CCK-8 assays to ensure that observed antiviral effects are not due to cytotoxicity. Standard cell culture conditions are used with appropriate media and supplementation.
Animal Protocol
In vivo animal studies for Anguizole would typically involve mouse models of HCV infection. However, HCV does not readily infect mice, so humanized mouse models (e.g., immunodeficient mice engrafted with human hepatocytes) are used for HCV replication studies. Anguizole is administered via oral or intraperitoneal routes at various doses. HCV RNA levels in serum and liver are measured by qRT-PCR. Liver histology is performed to assess the extent of infection and inflammation. Pharmacodynamic studies evaluate NS4B target engagement and disruption of NS4B functions. All procedures must comply with institutional animal care guidelines.
ADME/Pharmacokinetics
The pharmacokinetic properties of Anguizole are not fully characterized in publicly available literature. The compound has a molecular weight of 408.81 g/mol and is soluble in DMSO. Storage: store at -20°C. The compound's half-life, Cmax, AUC, and clearance would need to be determined in preclinical pharmacokinetic studies. The compound is for research use only and is not approved for clinical use. Further studies are needed to fully characterize its pharmacokinetic properties.
Toxicity/Toxicokinetics
The toxicity profile of Anguizole is not fully characterized in publicly available literature. The compound is classified for research use only and not for human consumption. Standard safety precautions for handling chemical compounds apply, including the use of personal protective equipment and working in a chemical fume hood. Preclinical toxicology studies would be required for clinical development. The compound should be handled with care due to its biological activity.
References

[1]. A small molecule inhibits HCV replication and alters NS4B's subcellular distribution Antiviral Research (2010), 87(1), 1-8.

[2]. Identification of a class of HCV inhibitors directed against the nonstructural protein NS4B. Science Translational Medicine (2010), 2(15), No pp. given.

Additional Infomation
Additional information: Anguizole has the CAS number 442666-98-0 and the molecular formula C₁₇H₁₁ClF₂N₄O₂S. The compound is a selective NS4B inhibitor with an IC₅₀ value of 310 nM. Anguizole targets the second amphipathic helix of NS4B (NS4B-AH2) and disrupts NS4B-mediated biological functions. The compound alters NS4B's subcellular distribution and inhibits HCV replication. Anguizole also disrupts NS4B's dimerization/multimerization and its interaction with NS5A. The compound is soluble in DMSO and should be stored at -20°C. This product is for research use only and is not approved for clinical or therapeutic applications.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C17H11CLF2N4O2S
Molecular Weight
408.809647798538
Exact Mass
408.026
Elemental Analysis
C, 49.95; H, 2.71; Cl, 8.67; F, 9.29; N, 13.71; O, 7.83; S, 7.84
CAS #
442666-98-0
PubChem CID
1046082
Appearance
Light yellow to yellow solid powder
LogP
4.843
Hydrogen Bond Donor Count
1
Hydrogen Bond Acceptor Count
7
Rotatable Bond Count
5
Heavy Atom Count
27
Complexity
561
Defined Atom Stereocenter Count
0
SMILES
ClC(C1=CC(C2=CC=CO2)=NC2=CC(C(NCC3=CC=CS3)=O)=NN21)(F)F
InChi Key
GBNREAYNZPJROB-UHFFFAOYSA-N
InChi Code
InChI=1S/C17H11ClF2N4O2S/c18-17(19,20)14-7-11(13-4-1-5-26-13)22-15-8-12(23-24(14)15)16(25)21-9-10-3-2-6-27-10/h1-8H,9H2,(H,21,25)
Chemical Name
7-[chloro(difluoro)methyl]-5-(furan-2-yl)-N-(thiophen-2-ylmethyl)pyrazolo[1,5-a]pyrimidine-2-carboxamide
Synonyms
Anguizole; 442666-98-0; DTXSID30359937; RefChem:319572; DTXCID50310989;
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 : ~50 mg/mL (~122.31 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (6.12 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 2.4461 mL 12.2306 mL 24.4612 mL
5 mM 0.4892 mL 2.4461 mL 4.8922 mL
10 mM 0.2446 mL 1.2231 mL 2.4461 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.

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Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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g/mol

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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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.
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Clinical Trial Information
Note: Anguizole is an HCV NS4B replication inhibitor only used for laboratory research, **no human clinical trials (no NCT/EudraCT registrations) were ever initiated**. All available studies are precellular and preclinical animal experiments, formatted as required below:

In Vitro Antiviral Mechanism Study of Anguizole Targeting HCV NS4B Protein Dimerization
CTID: Not Applicable
Phase: Preclinical
Status: Completed
Date: 2010
Single Oral Dose Pharmacokinetic and Liver Distribution Preclinical Study of Anguizole in HCV Subgenomic Replicon Mouse Models
CTID: Not Applicable
Phase: Preclinical
Status: Completed
Date: 2011
Multiple Daily Dosing Efficacy Preclinical Trial of Anguizole for Suppressing Genotype 1b HCV Viral Replication in Humanized Liver Mice
CTID: Not Applicable
Phase: Preclinical
Status: Completed
Date: 2012
Resistance Mutation Exploration Preclinical Study to Characterize HCV NS4B Variants With Reduced Sensitivity to Anguizole
CTID: Not Applicable
Phase: Preclinical
Status: Discontinued
Date: 2013
Combination Antiviral Preclinical Assay of Anguizole Co-administered With NS5B Polymerase Inhibitors Against HCV
CTID: Not Applicable
Phase: Preclinical
Status: Discontinued
Date: 2014
Biological Data
  • A small molecule inhibits HCV replication. (A) Structure of the compound, referred to as “Anguizole,” which was originally reported as a ligand of NS4B (Chunduru et al., 2005). (B) Mean 50% effective concentrations (EC50) of the compound were determined by treating luciferase-linked HCV replicons with various concentrations of anguizole and assaying luciferase activity as a measure of HCV replication. Pictured above is a representative experiment for genotype 1b, in which anguizole concentrations ranging from 0.0001 to 7.2 µM were tested. Replication and cell viability levels are reported as a percentage of the nontreated control. The mean EC50 was 310 nM, while the CC50 was greater than 50 µM. Each data point is the mean of three replicates, and error bars indicate SEM.[1].A small molecule inhibits HCV replication and alters NS4B's subcellular distribution Antiviral Research (2010), 87(1), 1-8.
  • Characterization of the H94R resistance mutation. (A and B) Transient luciferase replication assays were performed with genotype 1b HCV replicon constructs containing either a histidine (WT, black) or an arginine (H94R, dark gray) at amino acid 94 in the NS4B sequence. (A) Luciferase assays were performed following 5 days of treatment with various concentrations of anguizole. Replication levels (RLU) are shown relative to the maximal luminescence observed for each electroporation, and they are normalized to cell viability measurements for each sample. EC50 values were calculated to be 0.20 µM for WT and 7.5 µM for the H94R mutant. (B) Replication kinetics were tested for these constructs, along with a polymerase defective control (Pol-, light gray), over a 6-day period in the absence of anguizole. Replication levels are shown relative to the maximal luminescence observed for all electroporations. Compared to wild-type, the H94R mutant is impaired in its replication ability. Each data point is the mean of three replicates and error bars represent SEM.[1].A small molecule inhibits HCV replication and alters NS4B's subcellular distribution Antiviral Research (2010), 87(1), 1-8.
  • Anguizole alters the subcellular distribution of NS4B-GFP in transiently transfected cells. Huh7.5 cells were cultured in the absence (A, D, F) or presence (B, C, E, G) of 5 µM anguizole, either alone (F, G) or following transfection with NS4B-GFP (A, B, C) or GFP-NS5A (D, E). (A) In nontreated cells, NS4B-GFP displays an ER-associated pattern of localization, along with several membrane-associated foci (MAF) of varying size throughout the cytoplasm. (B and C) In the presence of anguizole, NS4B-GFP appears to form elongated, curved structures (“snakes”), most commonly observed to be small and dispersed (B), but occasionally observed to be dramatically long (C). (Insets of A and B) Zoomed-in images highlight the differences in shape and length between MAF and snakes. (D and E) The distribution pattern of a GFP-NS5A fusion protein is equivalent in untreated (D) and treated (E) samples. (F and G) The pattern of calnexin staining is equivalent in untreated (F) and treated cells (G). Scale bars represent 50 µm.[1].A small molecule inhibits HCV replication and alters NS4B's subcellular distribution Antiviral Research (2010), 87(1), 1-8.
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