2. Cell Cycle/DNA Damage
  3. DNA/RNA Synthesis
  4. Metarrestin

Metarrestin (ML246) is an orally active, first-in-class and specific perinucleolar compartment inhibitor. Metarrestin disrupts the nucleolar structure and inhibits RNA polymerase (Pol) I transcription, at least in part by interacting with the translation elongation factor eEF1A2. Metarrestin blocks metastatic development and extends survival in mouse cancer models.

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Metarrestin Chemical Structure

Metarrestin Chemical Structure

CAS No. : 1443414-10-5

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10 mM * 1 mL in DMSO
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Customer Review

Based on 1 publication(s) in Google Scholar

Metarrestin Related Antibodies

Top Publications Citing Use of Products

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

Metarrestin (ML246) is an orally active, first-in-class and specific perinucleolar compartment inhibitor. Metarrestin disrupts the nucleolar structure and inhibits RNA polymerase (Pol) I transcription, at least in part by interacting with the translation elongation factor eEF1A2. Metarrestin blocks metastatic development and extends survival in mouse cancer models[1][2].

IC50 & Target

Perinucleolar compartment[1]
In Vitro

Metarrestin (ML246) disrupts perinucleolar compartments in PC3M-GFP-PTB cells with an IC50 of 0.39 μM[2].
Metarrestin (1 μM; 24 hours) reduces perinucleolar compartment prevalence in different human cancer cell lines. Metarrestin impacts cell growth in cancer cell line PC3M but not in normal fibroblasts (GM02153)[2].
Metarrestin (0.6 μM; 24 hours) effectively blocks the invasion of PC3M and PANC1 cells[2].
Metarrestin (1 μM; 24 hours) does not significantly change the amounts of Pol I large subunit RPA194 and UBF in the three cell lines, PANC1, PC3M, and HeLa. Metarrestin shows a substantial reduction of 5’ETS RNA in cells[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Metarrestin Related Antibodies
In Vivo

Metarrestin (ML246; 5-25 mg/kg; IP; once daily; continuing for six weeks) displays a decrease in metastatic burden in both liver (p <0.01) and lung with 25 mg/kg[2].
Metarrestin (drug-infused chow; 10 mg/kg; 70 ppm) extends survival in the NSG PANC1 pancreatic cancer metastasis mice model[2].
Metarrestin (5, 25 mg/kg; ip; for 4 additional week) reduces metastasis of prostate cancer (PC3M) and growth of metastatic breast cancer PDX mice models[2].
Metarrestin (5 and 25 mg/kg; IP) has a half-life of 4.6 to 5.5 hours[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: NOD/IL2 gamma (null) PANC1 mice over primary tumor tissues[2]
Dosage: 5 and 25 mg/kg
Administration: IP; once daily; continuing for six weeks
Result: Displayed a decrease in metastatic burden in both liver (p <0.01) and lung with 25 mg/kg.
Demonstrated a significant reduction of perinucleolar compartment prevalence in metastatic and primary tumor tissues.
Animal Model: Female BALB/c mice[2]
Dosage: 5 and 25 mg/kg (Pharmacokinetic Analysis)
Administration: IP
Result: Indicated good exposure, distribution, and tolerability in vivo, with a half-life of 4.6 to 5.5 hours.
Clinical Trial
Molecular Weight

474.60

Formula

C31H30N4O
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O[C@H]1CC[C@H](N(C=NC2=C3C(C4=CC=CC=C4)=C(C5=CC=CC=C5)N2CC6=CC=CC=C6)C3=N)CC1
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 31.25 mg/mL (65.84 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.1070 mL 10.5352 mL 21.0704 mL
5 mM 0.4214 mL 2.1070 mL 4.2141 mL
View the 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.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
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Concentration
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Volume
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Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

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Volume (start)

V1

=
Concentration (final)

C2

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Volume (final)

V2

In Vivo:

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.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: 2.08 mg/mL (4.38 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.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

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(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
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Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
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
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 2.1070 mL 10.5352 mL 21.0704 mL 52.6759 mL
5 mM 0.4214 mL 2.1070 mL 4.2141 mL 10.5352 mL
10 mM 0.2107 mL 1.0535 mL 2.1070 mL 5.2676 mL
15 mM 0.1405 mL 0.7023 mL 1.4047 mL 3.5117 mL
20 mM 0.1054 mL 0.5268 mL 1.0535 mL 2.6338 mL
25 mM 0.0843 mL 0.4214 mL 0.8428 mL 2.1070 mL
30 mM 0.0702 mL 0.3512 mL 0.7023 mL 1.7559 mL
40 mM 0.0527 mL 0.2634 mL 0.5268 mL 1.3169 mL
50 mM 0.0421 mL 0.2107 mL 0.4214 mL 1.0535 mL
60 mM 0.0351 mL 0.1756 mL 0.3512 mL 0.8779 mL
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Metarrestin Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Metarrestin1443414-10-5ML246ML 246ML-246DNA/RNA SynthesisorallyperinucleolarcompartmentnucleolartranscriptioneEF1A2metastaticPC3M-GFP-PTBPANC1PC3MHeLapancreaticbreastInhibitorinhibitorinhibit

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