1. Epigenetics Stem Cell/Wnt Protein Tyrosine Kinase/RTK JAK/STAT Signaling
  2. JAK
  3. Ritlecitinib

Ritlecitinib  (Synonyms: PF-06651600)

Cat. No.: HY-100754 Purity: 99.98% ee.: 99.98%
COA Handling Instructions

PF-06651600 est un inhibiteur oralement actif et sélectif de JAK3 avec un IC50 de 33,1 nM.

Ritlecitinib (PF-06651600) is an orally active and selective JAK3 inhibitor with an IC50 of 33.1 nM.

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

Ritlecitinib Chemical Structure

Ritlecitinib Chemical Structure

CAS No. : 1792180-81-4

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10 mM * 1 mL in DMSO
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Customer Review

Based on 5 publication(s) in Google Scholar

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  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

Ritlecitinib (PF-06651600) is an orally active and selective JAK3 inhibitor with an IC50 of 33.1 nM[1].

IC50 & Target[1]

JAK3

33.1 nM (IC50)

In Vitro

Ritlecitinib is a potent JAK3-selective inhibitor which can inhibit the JAK3 kinase activity with an IC50 of 33.1 nM but without activity (IC50>10 000 nM) against JAK1, JAK2, and TYK2. Ritlecitinib inhibits the phosphorylation of STAT5 elicited by IL-2, IL-4, IL-7, and IL-15 with IC50 values of 244, 340, 407, and 266 nM, respectively. Ritlecitinib also inhibits the phosphorylation of STAT3 elicited by IL-21 with an IC50 of 355 nM. Functional assessment in T-cell differentiation assays demonstrate that Ritlecitinib suppresses Th1 and Th17 differentiation as measured by IFNγ, after 5 days under Th1 conditions, and IL-17 production, after 6 days under Th17 conditions, with IC50 values of 30 nM and 167 nM, respectively. Ritlecitinib also suppresses Th1 and Th17 function as measured by the inhibition of IFNγ production (IC50=48 nM) and IL-17 production (IC50=269 nM) in cells that have been previously differentiated and rested before being treated with PF-06651600[1].

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

In Vivo

In the rat adjuvant-induced arthritis (AIA) model, Ritlecitinib reduces paw swelling with an unbound EC50 of 169 nM. Similarly, Ritlecitinib significantly reduces disease severity in the experimental autoimmune encephalomyelitis (EAE) mouse model when dosed either therapeutically at 30 or 100 mg/kg or prophylactically at 20 and 60 mg/kg. The efficacy of Ritlecitinib in these two rodent models of inflammatory and autoimmune diseases illustrates that JAK3-selective inhibition can be sufficient to have disease modifying effects in human diseases[1].

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

Clinical Trial
Molecular Weight

285.34

Formula

C15H19N5O

CAS No.
Appearance

Solid

Color

White to yellow

SMILES

C=CC(N1[C@@H](C)CC[C@@H](NC2=C3C(NC=C3)=NC=N2)C1)=O

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 : 125 mg/mL (438.07 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 3.5046 mL 17.5230 mL 35.0459 mL
5 mM 0.7009 mL 3.5046 mL 7.0092 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

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C2

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Volume (final)

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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: ≥ 2.08 mg/mL (7.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    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.
  • Protocol 2

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

    Solubility: ≥ 2.08 mg/mL (7.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 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.

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
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:  0.5% Methyl cellulose/0.5% Tween-80 in Saline water

    Solubility: 6.67 mg/mL (23.38 mM); Suspended solution; Need ultrasonic

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(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: 99.98% ee.: 99.98%

References
Cell Assay
[1]

To study the effect of PF-06651600 on Th17 cells post differentiation, skewed Th17 cells are washed, rested with medium for overnight and resuspended in medium containing the same concentrations of cytokines as during skewing but without anti-CD3 or anti-CD28 antibodies, in the presence of PF-06651600 at 10 different concentrations for 2 additional days. On Day 9, supernatant is harvested from each well and IL-17A is determined[1].

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

Animal Administration
[1]

The effect of JAK3 inhibition by PF-06651600 is evaluated in vivo using a therapeutic dosing paradigm in a rat adjuvant-induced arthritis. When individual hind paw volume measurements indicate an increase of 0.2 mL (or greater) in a single hind paw, animals are randomly assigned to a treatment group. Daily treatment with PF-06651600 is administered via oral gavage. Treatment groups for Experiment 1 are: 80, 15, or 6 mg/kg of PF-06651600 or vehicle (2% Tween 80/0.5% methylcellulose/deionized water). Treatment groups for Experiment 2 are: 30, 10, and 3 mg/kg of PF-06651600 or vehicle (0.5% methylcellulose/de-ionized water/1 mEQ hydrochloric acid). Treatment groups for Experiment 3 are: 10, 1, 0.3 and 0.1 mg/kg of PF-06651600 or vehicle (0.5% methylcellulose/de-ionized water/1 mEQ hydrochloric acid). Treatment continues for 7 days[1].

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

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 3.5046 mL 17.5230 mL 35.0459 mL 87.6148 mL
5 mM 0.7009 mL 3.5046 mL 7.0092 mL 17.5230 mL
10 mM 0.3505 mL 1.7523 mL 3.5046 mL 8.7615 mL
15 mM 0.2336 mL 1.1682 mL 2.3364 mL 5.8410 mL
20 mM 0.1752 mL 0.8761 mL 1.7523 mL 4.3807 mL
25 mM 0.1402 mL 0.7009 mL 1.4018 mL 3.5046 mL
30 mM 0.1168 mL 0.5841 mL 1.1682 mL 2.9205 mL
40 mM 0.0876 mL 0.4381 mL 0.8761 mL 2.1904 mL
50 mM 0.0701 mL 0.3505 mL 0.7009 mL 1.7523 mL
60 mM 0.0584 mL 0.2920 mL 0.5841 mL 1.4602 mL
80 mM 0.0438 mL 0.2190 mL 0.4381 mL 1.0952 mL
100 mM 0.0350 mL 0.1752 mL 0.3505 mL 0.8761 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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Ritlecitinib
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