Development of novel antibacterial agents against methicillin-resistant Staphylococcus aureus
摘要:
Methicillin-resistant Staphylococcus aureus (MRSA) poses a serious threat to public health because of its resistance to multiple antibiotics most commonly used to treat infection. In this study, we report the unique ability of the cyclooxygenase-2 (COX-2) inhibitor celecoxib to kill Staphylococcus aureus and MRSA with modest potency. We hypothesize that the anti-Staphylococcus activity of celecoxib could be pharmacologically exploited to develop novel anti-MRSA agents with a distinct mechanism. Examination of an in-house, celecoxib-based focused compound library in conjunction with structural modifications led to the identification of compound 46 as the lead agent with high antibacterial potency against a panel of Staphylococcus pathogens and different strains of MRSA. Moreover, this killing effect is bacteria-specific, as human cancer cells are resistant to 46. In addition, a single intraperitoneal administration of compound 46 at 30 mg/kg improved the survival of MRSA-infected C57BL/6 mice. In light of its high potency in eradicating MRSA in vitro and its in vivo activity, compound 46 and its analogues warrant continued preclinical development as a potential therapeutic intervention against MRSA. (C) 2012 Elsevier Ltd. All rights reserved.
MODIFICATION OF LAYERED SILICATES FOR LUMINESCENCE ACTIVATION
申请人:Klauth Peter
公开号:US20120107624A1
公开(公告)日:2012-05-03
The invention relates to a method for producing a luminescent layered silicate composite. The method according to the invention is characterized in that at least one luminescent dye, in particular fluorescent dye, on the basis of at least one complex, essentially a chelate complex, of at least one element of the rare earth elements (“rare earth complex”) is introduced between and/or stored in at least two layers of at least one layered silicate (“layered silicate layers”) respectively or that at least one luminescent dye, in particular fluorescent dye, on the basis of at least one complex, essentially a chelate complex, of at least one element of the rare earth elements (“rare earth complex”) is combined with a layered silicate to form a composite. The luminescent layered silicate composite according to the invention can be used for marking objects, for example plastic-based objects, or in the field of bioanalysis.
[EN] ELECTROLUMINESCENT MATERIALS AND DEVICES<br/>[FR] MATIERES ELECTROLUMINESCENTES ET DISPOSITIFS LES CONTENANT
申请人:ELAM T LTD
公开号:WO2004013252A1
公开(公告)日:2004-02-12
An electroluminescent device in which the electroluminescent layer comprises a rare earth, lanthanide or actinide bis[tris(pyrazolyl)borate)mono(acetonate).