2. Immunology/Inflammation
  3. PGE synthase
  4. AT-56

AT-56 is a potent, selective and orally active inhibitor of lipocalin-type prostaglandin D synthase (L-PGDS), with an IC50 of 95 μM and Ki of 75 μM. AT-56 could selectively suppress the drowsiness or pain reaction mediated by L-PGDS-catalyzed PGD2.

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AT-56 Chemical Structure

AT-56 Chemical Structure

CAS No. : 162640-98-4

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 105 In-stock
Solution
10 mM * 1 mL in DMSO USD 105 In-stock
Solid
5 mg USD 95 In-stock
10 mg USD 160 In-stock
25 mg USD 340 In-stock
50 mg USD 550 In-stock
100 mg USD 890 In-stock
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Based on 1 publication(s) in Google Scholar

AT-56 Related Antibodies

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  • Biological Activity

  • Purity & Documentation

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Description

AT-56 is a potent, selective and orally active inhibitor of lipocalin-type prostaglandin D synthase (L-PGDS), with an IC50 of 95 μM and Ki of 75 μM. AT-56 could selectively suppress the drowsiness or pain reaction mediated by L-PGDS-catalyzed PGD2[1].

IC50 & Target

IC50: 95 μM (L-PGDS); Ki: 75 μM (L-PGDS)[1]
In Vitro

AT-56 (1-30 μM; 10 minutes) dose-dependently inhibits the production of PGD2 in L-PGDS-expressing human medulloblastoma TE-671 cells with an IC50 of about 3 μM[1].

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

AT-56 Related Antibodies
In Vivo

AT-56 ( 1-30 mg/kg; p.o.) suppresses the PGD2 production in the stab-wounded brain[1].
AT-56 (1-10 mg/kg; p.o.) suppresses the L-PGDS-mediated allergic airway inflammation in mice[1].
AT-56 (10 mg/kg; p.o.) exhibits Cmax (2.15 μg/ml), half-life (1.71 h) and high oral bioavailability (82%)[1].

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

Animal Model: H-PGDS KO mice (14-16weeks, 25-30 g, C57BL/6 strain) with a stab wound brain injury[1]
Dosage: 0, 1, 3, 10, 30 mg/kg
Administration: P.o. 1 h before the stab wound injury
Result: Inhibited the L-PGDS reaction in the brain.
Decreased the total amount of PGD2 in the brain to 40% with 30 mg/kg AT-56.
Animal Model: Human L-PGDS-overexpressing TG mice (males, 14-16 weeks, 25-30 g)[1]
Dosage:  0, 1, 10 mg/kg
Administration: P.o. 1 h before and 24 h after the antigen exposure
Result: Prevented the eosinophil infiltration by inhibiting transgened human L-PGDS.
Animal Model: Male C57BL/6 mice (7 weeks, 22-26 g)[1]
Dosage: 10 mg/kg for p.o. and 2 mg/kg for i.v. (Pharmacokinetic Analysis)
Administration: P.o. and i.v. administration
Result: Oral bioavailability (82%); Cmax (2.15 μg/ml); T1/2 (1.71 h, p.o.); T1/2 (2.35 h, i.v.).
Molecular Weight

397.52

Formula

C25H27N5
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

N1(CCCCC2=NNN=N2)CC/C(CC1)=C3C4=CC=CC=C4C=CC5=CC=CC=C/35
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 : 100 mg/mL (251.56 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 2.5156 mL 12.5780 mL 25.1560 mL
5 mM 0.5031 mL 2.5156 mL 5.0312 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.

  • Molarity Calculator

  • Dilution Calculator

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

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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)

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C2

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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    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (6.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 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.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.5 mg/mL (6.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

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mg/kg

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(per animal)

g

Dosing volume
(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 +
% 
+
%
Tween-80 +
%
Saline
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

Purity: 98.45%

COA (249 KB) HNMR (283 KB) LCMS (275 KB)

Handling Instructions (2659 KB)
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 2.5156 mL 12.5780 mL 25.1560 mL 62.8899 mL
5 mM 0.5031 mL 2.5156 mL 5.0312 mL 12.5780 mL
10 mM 0.2516 mL 1.2578 mL 2.5156 mL 6.2890 mL
15 mM 0.1677 mL 0.8385 mL 1.6771 mL 4.1927 mL
20 mM 0.1258 mL 0.6289 mL 1.2578 mL 3.1445 mL
25 mM 0.1006 mL 0.5031 mL 1.0062 mL 2.5156 mL
30 mM 0.0839 mL 0.4193 mL 0.8385 mL 2.0963 mL
40 mM 0.0629 mL 0.3144 mL 0.6289 mL 1.5722 mL
50 mM 0.0503 mL 0.2516 mL 0.5031 mL 1.2578 mL
60 mM 0.0419 mL 0.2096 mL 0.4193 mL 1.0482 mL
80 mM 0.0314 mL 0.1572 mL 0.3144 mL 0.7861 mL
100 mM 0.0252 mL 0.1258 mL 0.2516 mL 0.6289 mL
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AT-56 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:

AT-56162640-98-4AT56AT 56PGE synthaseProstaglandin E synthaseLipocalin-typeprostaglandinDsynthasePGL-PGDSdrowsinessinflammatoryInhibitorinhibitorinhibit

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