Bufexamac - CAS 2438-72-4
Catalog number:
2438-72-4
Category:
Inhibitor
Not Intended for Therapeutic Use. For research use only.
Molecular Formula:
C12H17NO3
Molecular Weight:
223.27
COA:
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Targets:
COX
Description:
Bufexamac is a COX inhibitor for IFN-α release with EC50 of 8.9 μM.Bufexamac is a drug used as an anti-inflammatory agent on the skin, as well as rectally. Common brand names include Paraderm and Parfenac. It was withdrawn in Europe because of allergic reactions.
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Purity:
>98%
Synonyms:
Bufexamac
MSDS:
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1.Allergic contact dermatitis to topical preparations of bufexamac.
Pan Y1, Nixon R. Australas J Dermatol. 2012 Aug;53(3):207-10. doi: 10.1111/j.1440-0960.2012.00876.x. Epub 2012 Mar 2.
In Australia bufexamac is mainly used for pharmacist-initiated local treatment of various dermatoses. The European Medicines Agency's Committee for Medicinal Products for Human Use recently recommended that marketing authorisation for bufexamac-containing preparations be revoked throughout the European Union because of the risk of severe allergic contact dermatitis. We retrospectively reviewed the patch test database at the Skin and Cancer Foundation Inc. and identified 19 cases of positive reactions to bufexamac (5% petrolatum) from 451 people patch tested. The bufexamac reaction was deemed relevant to the presenting dermatitis in 13 of 19 (68%) patients. Bufexamac allergic contact dermatitis is under-reported in the English literature. We wish to emphasise the severity and the unusually polymorphic eruptions observed in some of the cases. Clinicians should consider the possibility of allergic contact dermatitis to bufexamac-containing preparations in all patients where there is a history of exposure, even if used for only a short time.
2.In vitro photobiochemical characterization of sulfobutylether-β-cyclodextrin formulation of bufexamac.
Seto Y1, Ochi M, Igarashi N, Inoue R, Oishi A, Toida T, Yamada S, Onoue S. J Pharm Biomed Anal. 2011 Jun 1;55(3):591-6. doi: 10.1016/j.jpba.2011.02.025. Epub 2011 Feb 26.
The present study aimed to modulate the photoreactivity of bufexamac, with a focus on photostability and phototoxicity, by forming an inclusion complex with sulfobutylether-β-cyclodextrin (SBECD). The photobiochemical properties of bufexamac were evaluated by reactive oxygen species (ROS) assay and using in vitro photogenotoxic assessment tools. To assess the inclusion properties of SBECD complex with bufexamac, a UV absorption spectroscopic study was also carried out. The influence of SBECD on the photoreactivity of bufexamac was analyzed by ROS assay and photostability test. From the photobiochemical data, superoxide generation from irradiated bufexamac indicated its photoreactivity; however, the photogenotoxic risk of bufexamac was negligible owing to low DNA-binding affinity and DNA-photocleaving activity. SBECD complex of bufexamac was formed, and the association constant of the complex was calculated to be 620M(-1). On the basis of the photochemical data on bufexamac co-existing with SBECD, ROS generation from irradiated bufexamac (200μM) was inhibited by SBECD at concentrations of over 20μM.
3.Bufexamac ameliorates LPS-induced acute lung injury in mice by targeting LTA4H.
Xiao Q1, Dong N2, Yao X2, Wu D2, Lu Y2, Mao F2, Zhu J2, Li J2, Huang J2, Chen A3, Huang L3, Wang X3, Yang G1, He G1, Xu Y3, Lu W4. Sci Rep. 2016 Apr 29;6:25298. doi: 10.1038/srep25298.
Neutrophils play an important role in the occurrence and development of acute lung injury (ALI). Leukotriene B4 (LTB4), a hydrolysis product of epoxide leukotriene A4 (LTA4) catalyzed by LTA4 hydrolase (LTA4H), is one of the most potent chemoattractants for neutrophil. Bufexamac is a drug widely used as an anti-inflammatory agent on the skin, however, the mechanism of action is still not fully understood. In this study, we found bufexamac was capable of specifically inhibiting LTA4H enzymatic activity and revealed the mode of interaction of bufexamac and LTA4H using X-ray crystallography. Moreover, bufexamac significantly prevented the production of LTB4 in neutrophil and inhibited the fMLP-induced neutrophil migration through inhibition of LTA4H. Finally, bufexamac significantly attenuated lung inflammation as reflected by reduced LTB4 levels and weakened neutrophil infiltration in bronchoalveolar lavage fluid from a lipopolysaccharide-induced ALI mouse model.
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CAS 2438-72-4 Bufexamac

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