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MS402

Cat. No. M10645
MS402 Structure
Synonym:

MS-402

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25mg USD 250  USD250 4-7 Days
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Biological Activity

MS402 is a novel BD1-selective BET BrD inhibitor, inhibiting primarily Th17 cell differentiation with a little or almost no effect on Th1 or Th2 and Treg cells. MS402 has Ki values of 77 nM, 718 nM, 110 nM, 200 nM, 83 nM, and 240 nM for BRD4(BD1), BRD4(BD2), BRD3(BD1), BRD3(BD2), BRD2(BD1) and BRD2(BD2), respectively. MS402 preferentially renders Brd4 binding to Th17 signature gene loci over those of housekeeping genes and reduces Brd4 recruitment of p-TEFb to phosphorylate and activate RNA polymerase II for transcription elongation. MS402 prevents and ameliorates T-cell transfer-induced colitis in mice by blocking Th17 cell overdevelopment.

Protocol (for reference only)
Cell Experiment
Cell lines murine primary naive CD4+ T cells
Preparation method To study the role of BET proteins in Th cell differentiation we isolated murine primary naïve CD4+ T cells from mouse spleen and lymph nodes and treated them with IL-12, IL-4 plus α-IL-12, TGF-β plus IL-6, or TGF-β plus IL-2, respectively, to promote Th1, Th2, Th17, or Treg linage-specific differentiation over 3.5 d with or without MS402 added daily to cell culture (Fig. 2A). Strikingly, as shown by flow cytometry analysis, MS402, in a dose-dependent manner, inhibited IL-17 release from 18.6 to 8.0% in the Th17 polarizing condition and to a lesser extent IFN-γ production from 49.7 to 38.6% in the Th1 condition; it had little, if any, effect on IL-4 and Foxp3 expression during Th2 and Treg cell differentiation, respectively (Fig. 2B). MS402 did not affect T-cell proliferation as assessed in a carboxy-fluorescein succinimidyl ester dilution assay (Fig. S2A).
Concentrations 100 nM or 500 nM
Incubation time 3.5 d
Animal Experiment
Animal models Rag1−/− mice
Formulation -
Dosages 10 mg/kg
Administration i.p. injections twice a week for 3 wk
Chemical Information
Molecular Weight 370.83
Formula C20H19ClN2O3
CAS Number 1672684-68-2
Solubility (25°C) DMSO ≥ 90 mg/mL
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] Kalung Cheung, et al. Proc Natl Acad Sci U S A . BET N-terminal bromodomain inhibition selectively blocks Th17 cell differentiation and ameliorates colitis in mice

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  Catalog
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Keywords: MS402, MS-402 supplier, Epigenetic Reader Domain, inhibitors, activators


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