Doramapimod (BIRB 796)

Catalog No.S1574 Batch:S157406

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Technical Data

Formula

C31H37N5O3
Molecular Weight 527.66 CAS No. 285983-48-4
Solubility (25°C)* In vitro DMSO 100 mg/mL (189.51 mM)
Ethanol 100 mg/mL (189.51 mM)
Water Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O
5.0mg/ml Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to make it clear; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Doramapimod (BIRB 796) is a pan-p38 MAPK inhibitor with IC50 of 38 nM, 65 nM, 200 nM and 520 nM for p38α/β/γ/δ in cell-free assays, and binds p38α with Kd of 0.1 nM in THP-1 cells, 330-fold greater selectivity versus JNK2, weak inhibition for c-RAF, Fyn and Lck, insignificant inhibition of ERK-1, SYK, IKK2.
Targets
JNK2 [1] c-RAF [1] Fyn [1] p38α [1]
(Cell-free assay)		 p38α [7]
0.1 nM(Kd) 38 nM
In vitro

BIRB 796 shows no significant inhibition to ERK-1, SYK, IKK2β, ZAP-70, EGF receptor kinase, HER2, protein kinase A (PKA), PKC, PKC-α, PKC-β (I and II) and PKC-γ. BIRB 796 greatly improves binding affinity by forming a hydrogen bond between the morpholine oxygen and the ATP-binding domain of p38α. BIRB 796 represents one of the most potent and slowest dissociating inhibitors against human p38 MAP kinase now known. [1]

BIRB 796 potently inhibits c-Raf-1 and Jnk2α2 with IC50 of 1.4 and 0.1 nM, respectively. [2]

BIRB796 also inhibits the activity and the activation of SAPK3/p38γ at a higher concentration than it does in p38α. BIRB796 blocks the stress-induced phosphorylation of the scaffold protein SAP97, which is a physiological substrate of SAPK3/p38γ. BIRB796 blocks JNK1/2 activation and activity in HEK293 cells, while not inhibits the activation and activity of ERK1/ERK2 in Hela cells. Moreover, the binding of BIRB796 to the p38 MAPKs or JNK1/2 is impairing their phosphorylation by the upstream kinase MKK6 or MKK4 rather than enhancing their dephosphorylation. [3]

BIRB 796 blocks baseline and upregulation of p38 MAPK and Hsp27 phosphorylation, thereby enhancing cytotoxicity and caspase activation. BIRB 796 downregulates IL-6 and VEGF secretion in BMSCs triggered by TNF-α and TGF-β1. [4]

BIRB-796 has a pyrazole scaffold that places a lipophilic t-butyl group into the lower selectivity site and a tolyl ring into the upper selectivity site. BIRB-796 also inhibits B-Raf and Abl with IC50 of 83 nM and 14.6 μM, respectively. [5]
In vivo

BIRB 796 (30 mg/kg) inhibits 84% of TNF-α in LPS-stimulated mice and demonstrates efficacy in a mouse model of established collagen-induced arthritis. [1]

BIRB 796 has good pharmacokinetic performance even after oral administration in mice. [2]
Features The first p38 MAPK inhibitor to be tested in a phase III clinical trial.

Protocol (from reference)

Kinase Assay:

[6]
  • Procedures for the THP-1 cellular assay for inhibition of LPS-stimulated TNF-α production

    THP-1 cells are preincubated in the presence and absence of BIRB 796 for 30 min. Cell mixture is stimulated with LPS (1 μg/mL final) and incubation continued overnight (18−24 hours) as above. Supernatant is analyzed for human TNF-α by a commercially available ELISA. Data are combined and analyzed by nonlinear regression using a three parameter logistic model to obtain an EC50 value. BIRB 796 is analyzed in each experiment and the 95% confidence intervals for the EC50 are between 16 and 22 nM.

Animal Study:

[2]
  • Animal Models

    Collagen-induced arthritis in female Balb/c mice

  • Dosages

    1 mg/kg (intravenous) or 10 mg/kg (oral)

  • Administration

    Intravenous injection or by oral

Customer Product Validation

Data from [Data independently produced by Int J Cancer, 2014, 134(3), 575-86]

Data from [Data independently produced by Biochem J, 2014, 449(2), 497-506]

Data from [Data independently produced by Blood, 2012, 119(26), 6255-8]

Data from [Data independently produced by Cancer Lett, 2012, 324(1), 98-108]

Selleck's Doramapimod (BIRB 796) has been cited by 127 publications

Tumor cell-released autophagosomes (TRAPs) induce PD-L1-decorated NETs that suppress T-cell function to promote breast cancer pulmonary metastasis [ J Immunother Cancer, 2024, 12(6)e009082] PubMed: 38926151
Vitamin D3 inhibits p38 MAPK and senescence-associated inflammatory mediator secretion by senescent fibroblasts that impacts immune responses during ageing [ Aging Cell, 2024, e14093.] PubMed: 38287646
Lack of p38 activation in T cells increases IL-35 and protects against obesity by promoting thermogenesis [ EMBO Rep, 2024, 10.1038/s44319-024-00149-y] PubMed: 38730210
Cetylpyridinium chloride triggers paraptosis to suppress pancreatic tumor growth via the ERN1-MAP3K5-p38 pathway [ iScience, 2024, 27(8):110598] PubMed: 39211547
Reporter cell lines to screen for inhibitors or regulators of the KRAS-RAF-MEK1/2-ERK1/2 pathway [ Biochem J, 2024, 481(6):405-422] PubMed: 38381045
Skeletal muscle-secreted DLPC orchestrates systemic energy homeostasis by enhancing adipose browning [ Nat Commun, 2023, 14(1):7916] PubMed: 38036537
Chemical-induced epigenome resetting for regeneration program activation in human cells [ Cell Rep, 2023, 42(6):112547] PubMed: 37224020
Role of the p38/AKT Pathway in the Promotion of Cell Proliferation by Serum Heat Inactivation [ Int J Mol Sci, 2023, 10.3390/ijms242216538] PubMed: 38003726
USP24-dependent stabilization of Runx2 recruits a p300/NCOA3 complex to transactivate ADAMTS genes and promote degeneration of intervertebral disc in chronic inflammation mice [ Biol Direct, 2023, 18(1):37] PubMed: 37415159
Cellular stress induces non-canonical activation of the receptor tyrosine kinase EphA2 through the p38-MK2-RSK signaling pathway [ J Biol Chem, 2023, S0021-9258(23)00341-1] PubMed: 37059179

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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