WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 206045

CAS#: 266359-83-5 (free base)

Description: Reparixin is an inhibitor of CXCR2 function, which attenuates inflammatory responses and promotes recovery of function after traumatic lesion to the spinal cord. In a human breast cancer cell line, both reparixin reduced the number of breast cancer stem cells compared with no treatment. I n mice with primary human breast cancer xenografts, reparixin alone or in combination with docetaxel reduced tumor growth compared with saline control. The combination had greater efficacy than either reparixin or docetaxel alone.

Chemical Structure

CAS# 266359-83-5 (free base)

Theoretical Analysis

MedKoo Cat#: 206045
Name: Reparixin
CAS#: 266359-83-5 (free base)
Chemical Formula: C14H21NO3S
Exact Mass: 283.12421
Molecular Weight: 283.39
Elemental Analysis: C, 59.34; H, 7.47; N, 4.94; O, 16.94; S, 11.31

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Related CAS #: 266359-83-5 (free)   266359-93-7 (lysine salt)    

Synonym: DF 1681Y; DF-1681Y; DF1681Y; Reparixin; Repertaxin.

IUPAC/Chemical Name: (R)-2-(4-isobutylphenyl)-N-(methylsulfonyl)propanamide


InChi Code: InChI=1S/C14H21NO3S/c1-10(2)9-12-5-7-13(8-6-12)11(3)14(16)15-19(4,17)18/h5-8,10-11H,9H2,1-4H3,(H,15,16)/t11-/m1/s1

SMILES Code: C[C@H](C1=CC=C(CC(C)C)C=C1)C(NS(=O)(C)=O)=O

Appearance: Solid powder

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

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 283.39 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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 1: Kim HY, Choi JH, Kang YJ, Park SY, Choi HC, Kim HS. Reparixin, an inhibitor of CXCR1 and CXCR2 receptor activation, attenuates blood pressure and hypertension-related mediators expression in spontaneously hypertensive rats. Biol Pharm Bull. 2011;34(1):120-7. PubMed PMID: 21212529.

2: Zarbock A, Allegretti M, Ley K. Therapeutic inhibition of CXCR2 by Reparixin attenuates acute lung injury in mice. Br J Pharmacol. 2008 Oct;155(3):357-64. doi: 10.1038/bjp.2008.270. Epub 2008 Jun 30. PubMed PMID: 18587419; PubMed Central PMCID: PMC2567887.

3: Gorio A, Madaschi L, Zadra G, Marfia G, Cavalieri B, Bertini R, Di Giulio AM. Reparixin, an inhibitor of CXCR2 function, attenuates inflammatory responses and promotes recovery of function after traumatic lesion to the spinal cord. J Pharmacol Exp Ther. 2007 Sep;322(3):973-81. Epub 2007 Jun 29. PubMed PMID: 17601981.

4: Villa P, Triulzi S, Cavalieri B, Di Bitondo R, Bertini R, Barbera S, Bigini P, Mennini T, Gelosa P, Tremoli E, Sironi L, Ghezzi P. The interleukin-8 (IL-8/CXCL8) receptor inhibitor reparixin improves neurological deficits and reduces long-term inflammation in permanent and transient cerebral ischemia in rats. Mol Med. 2007 Mar-Apr;13(3-4):125-33. PubMed PMID: 17592546; PubMed Central PMCID: PMC1892761.

5: Leitner JM, Mayr FB, Firbas C, Spiel AO, Steinlechner B, Novellini R, Jilma B. Reparixin, a specific interleukin-8 inhibitor, has no effects on inflammation during endotoxemia. Int J Immunopathol Pharmacol. 2007 Jan-Mar;20(1):25-36. PubMed PMID: 17346425.

6: Midgley I, Fitzpatrick K, Wright SJ, John BA, Peard AJ, Major RM, Holding JD, McBurney A, Anacardio R, Novellini R, Ferrari MP. Species differences in the pharmacokinetics and metabolism of reparixin in rat and dog. Xenobiotica. 2006 May;36(5):419-40. PubMed PMID: 16854780.

Additional Information