RWJ 67657

Catalog No. size PriceQuantity
M6448-2 2mg solid $186
M6448-10 10mg solid $756


RWJ 67657 is a potent p38 MAPK inhibitor, which inhibited the release of TNF-alpha by lipopolysaccharide (a monocyte stimulus)-treated human peripheral blood mononuclear cells with an IC(50) of 3 nM, as well as the release of TNF-alpha from peripheral blood mononuclear cells treated with the superantigen staphylococcal enterotoxin B (a T cell stimulus), with an IC(50) value of 13 nM. This compound was approximately 10-fold more potent than the literature standard p38 kinase inhibitor SB 203580 in all p38 dependent in vitro systems tested.

Product information

CAS Number: 215303-72-3

Molecular Weight: 425.50

Formula: C27H24FN3O




RWJ 67657

Chemical Name: 4-(4-(4-fluorophenyl)-1-(3-phenylpropyl)-5-(pyridin-4-yl)-1H-imidazol-2-yl)but-3-yn-1-ol

Smiles: OCCC#CC1=NC(C2=CC=C(F)C=C2)=C(C2C=CN=CC=2)N1CCCC1C=CC=CC=1


InChi: InChI=1S/C27H24FN3O/c28-24-13-11-22(12-14-24)26-27(23-15-17-29-18-16-23)31(25(30-26)10-4-5-20-32)19-6-9-21-7-2-1-3-8-21/h1-3,7-8,11-18,32H,5-6,9,19-20H2

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Soluble in DMSO, not in water

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

RWJ 67657 inhibits the release of TNF-α by lipopolysaccharide (LPS)-treated human peripheral blood mononuclear cells with an IC50 of 3 nM, as well as the release of TNF-α from peripheral blood mononuclear cells treated with the superantigen staphylococcal enterotoxin B, with an IC50 value of 13 nM.RWJ 67657 (10 μM; 24 hours) decreases colony formation in MCF-7 cells.

In Vivo:

RWJ 67657 inhibits TNF-alpha production in lipopolysaccharide-injected mice (87% inhibition at 50 mg/kg) and in rats (91% inhibition at 25 mg/kg) after oral administration.RWJ 67657 (50 mg/kg; administered orally; once per day for 7 consecutive days) displays a potent anti-inflammatory effect. By both improving the functioning of endothelial progenitor cells (EPCs) and reducing inflammation, EPC transplantation plus RWJ 67657 administration synergistically promotes angiogenesis and neurogenesis after diabetic stroke.


  1. Westra J, Kułdo JM, van Rijswijk MH, Molema G, Limburg PC. Chemokine production and E-selectin expression in activated endothelial cells are inhibited by p38 MAPK (mitogen activated protein kinase) inhibitor RWJ 67657. Int Immunopharmacol. 2005 Jul;5(7-8):1259-69. Epub 2005 Apr 26. PubMed PMID: 15914330.
  2. Westra J, Limburg PC, de Boer P, van Rijswijk MH. Effects of RWJ 67657, a p38 mitogen activated protein kinase (MAPK) inhibitor, on the production of inflammatory mediators by rheumatoid synovial fibroblasts. Ann Rheum Dis. 2004 Nov;63(11):1453-9. PubMed PMID: 15479895; PubMed Central PMCID: PMC1754789.
  3. Parasrampuria DA, de Boer P, Desai-Krieger D, Chow AT, Jones CR. Single-dose pharmacokinetics and pharmacodynamics of RWJ 67657, a specific p38 mitogen-activated protein kinase inhibitor: a first-in-human study. J Clin Pharmacol. 2003 Apr;43(4):406-13. PubMed PMID: 12723461.
  4. Faas MM, Moes H, Fijen JW, Muller Kobold AC, Tulleken JE, Zijlstra JG. Monocyte intracellular cytokine production during human endotoxaemia with or without a second in vitro LPS challenge: effect of RWJ-67657, a p38 MAP-kinase inhibitor, on LPS-hyporesponsiveness. Clin Exp Immunol. 2002 Feb;127(2):337-43. PubMed PMID: 11876759; PubMed Central PMCID: PMC1906333.
  5. Fijen JW, Zijlstra JG, De Boer P, Spanjersberg R, Tervaert JW, Van Der Werf TS, Ligtenberg JJ, Tulleken JE. Suppression of the clinical and cytokine response to endotoxin by RWJ-67657, a p38 mitogen-activated protein-kinase inhibitor, in healthy human volunteers. Clin Exp Immunol. 2001 Apr;124(1):16-20. PubMed PMID: 11359438; PubMed Central PMCID: PMC1906020.
  6. Wadsworth SA, Cavender DE, Beers SA, Lalan P, Schafer PH, Malloy EA, Wu W, Fahmy B, Olini GC, Davis JE, Pellegrino-Gensey JL, Wachter MP, Siekierka JJ. RWJ 67657, a potent, orally active inhibitor of p38 mitogen-activated protein kinase. J Pharmacol Exp Ther. 1999 Nov;291(2):680-7. PubMed PMID: 10525088.

Products are for research use only. Not for human use.

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