1. Cell Cycle/DNA Damage Epigenetics Apoptosis
  2. HDAC Apoptosis DNA/RNA Synthesis
  3. GEM144

GEM144 is a potent and orally active DNA polymerase α (POLA1) and HDAC 11 dual inhibitor. GEM144 induces acetylation of p53, activation of p21, G1/S cell cycle arrest, and apoptosis. GEM144 has significant antitumor activity in human orthotopic malignant pleural mesothelioma xenografts.

For research use only. We do not sell to patients.

GEM144 Chemical Structure

GEM144 Chemical Structure

CAS No. : 2487526-28-1

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Based on 1 publication(s) in Google Scholar

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Description

GEM144 is a potent and orally active DNA polymerase α (POLA1) and HDAC 11 dual inhibitor. GEM144 induces acetylation of p53, activation of p21, G1/S cell cycle arrest, and apoptosis. GEM144 has significant antitumor activity in human orthotopic malignant pleural mesothelioma xenografts[1].

IC50 & Target

HDAC11

8.23 μM (IC50)

In Vitro

GEM144 (0-10 μM; 24 hours) exhibits antiproliferative activity in tested cancer cell lines with IC50s of 0.26 ~ 2.2 μM[1].
GEM144 (0.1 - 0.4 μM; 24 hours) strongly increases levels of H2AX phosphorylation on Ser 39 (γH2AX), and strongly upregulates p21 expression in a dose-dependent manner[1].
GEM144 (0.26 μM in NCI-H4609, 0.95 μM in A2780 and 1.4 μM in MM473; 72 hours) induced G1/S cell cycle arrest[1].

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

Cell Proliferation Assay

Cell Line: NCI-H460, H460-R9A, A2780 and A2780-DX[1]
Concentration: 0-10 μM
Incubation Time: 24 hours (further 48 h growth in drug-free medium)
Result: Exhibited antiproliferative activity in tested cancer cell lines with IC50s of 0.26 ~ 2.2 μM.

Western Blot Analysis

Cell Line: NCI-H460[1]
Concentration: 0.1 μM, 0.25 μM and 0.4 μM
Incubation Time: 24 hours
Result: Strongly increased levels of H2AX phosphorylation on Ser 39 (γH2AX), and strongly upregulated p21 expression in a dose-dependent manner.

Cell Cycle Analysis

Cell Line: NCI-H4609, A2780 and MM473[1]
Concentration: 0.26 μM in NCI-H4609, 0.95 μM in A2780 and 1.4 μM in MM473
Incubation Time: 72 hours
Result: Induced G1/S cell cycle arrest.
In Vivo

GEM144 (50 mg/kg; p.o., bid, 5 days a week, for 3-4 weeks) significantly reduces tumor burden of MM487 with TGI of 72% in xenografts mice[1].

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

Animal Model: Female CD-1 nude mice (injected with MM473 and MM487)[1]
Dosage: 50 mg/kg
Administration: PO, bid, 5 days a week, for 3-4 weeks
Result: Significantly reduced tumor burden of MM487 with TGI of 72%.
Molecular Weight

461.55

Formula

C28H31NO5

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

ONC(C(C)OC1=C(C=C(C2=CC=C(C=C2)/C=C/C(O)=O)C=C1)C34CC5CC(CC(C5)C4)C3)=O

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 200 mg/mL (433.32 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 2.1666 mL 10.8331 mL 21.6661 mL
5 mM 0.4333 mL 2.1666 mL 4.3332 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, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

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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    90% Corn Oil

    Solubility: ≥ 5 mg/mL (10.83 mM); Clear solution

    This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator
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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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, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.1666 mL 10.8331 mL 21.6661 mL 54.1653 mL
5 mM 0.4333 mL 2.1666 mL 4.3332 mL 10.8331 mL
10 mM 0.2167 mL 1.0833 mL 2.1666 mL 5.4165 mL
15 mM 0.1444 mL 0.7222 mL 1.4444 mL 3.6110 mL
20 mM 0.1083 mL 0.5417 mL 1.0833 mL 2.7083 mL
25 mM 0.0867 mL 0.4333 mL 0.8666 mL 2.1666 mL
30 mM 0.0722 mL 0.3611 mL 0.7222 mL 1.8055 mL
40 mM 0.0542 mL 0.2708 mL 0.5417 mL 1.3541 mL
50 mM 0.0433 mL 0.2167 mL 0.4333 mL 1.0833 mL
60 mM 0.0361 mL 0.1806 mL 0.3611 mL 0.9028 mL
80 mM 0.0271 mL 0.1354 mL 0.2708 mL 0.6771 mL
100 mM 0.0217 mL 0.1083 mL 0.2167 mL 0.5417 mL
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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.

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GEM144
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