Florian Rörsch

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DMC (dimethylcelecoxib={4-[5-(2,5-dimethylphenyl)-3(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide}) is a close derivative of celecoxib, without cyclooxygenase inhibiting properties up to very high concentrations. Nevertheless, after stimulation of various human cell lines with IL-1β/TNFα and simultaneous treatment with DMC PGE(2) synthesis is(More)
Because of their favourable safety profile and beneficial anti-inflammatory properties, the CysLT1 receptor antagonists (LTRA), montelukast, zafirlukast and pranlukast are approved for the treatment of asthma and are frequently prescribed as add-on therapeutics to reduce the amount of inhaled glucocorticoids and β2-agonists. There is evidence that some of(More)
5-Lipoxygenase (5-LO) is a crucial enzyme of the arachidonic acid (AA) cascade and catalyzes the formation of bioactive leukotrienes (LTs) which are involved in inflammatory diseases and allergic reactions. The pathophysiological effects of LTs are considered to be prevented by 5-LO inhibitors. In this study we present(More)
Microsomal prostaglandin E(2)-synthase (mPGES-1) is a target for future anti-inflammatory drugs. Inhibitors of mPGES-1 mimicking prostaglandin E(2) often interact with cyclooxygenases (COXs) 1 and 2, leading to unwanted side effects. Selective inhibitors of mPGES-1 can be obtained by deliberate abdication of the acidic groups, which are an important feature(More)
Microsomal prostaglandin E synthase 1 (mPGES-1) is a key enzyme of the arachidonic acid cascade. Its product PGE(2) plays an important role in various inflammatory processes, pain, fever, and cancer. Selective inhibition of mPGES-1 might be a promising step to avoid cyclooxygenase-related effects of NSAIDs. We studied a class of quinazolinone derivatives of(More)
Dimethylcelecoxib, a non-COX-2 inhibiting derivative of celecoxib, inhibits PGE(2) synthesis by transcriptional inhibition of mPGES-1. Previously we demonstrated that DMC downregulates EGR1 expression and increases nuclear NF-κB in human cervical cancer cells (HeLa). Both transcription factors are important regulators of mPGES-1 expression. Here we show(More)
Electrophoretic Mobility Shift Assays (EMSAs) are used to detect DNA-protein interactions. With this type of assay it is difficult to distinguish between specific and non-specific DNA-protein complexes or to define which protein binds to the DNA. Here we describe a novel Western blot-combined EMSA (WEMSA) variant for a fluorescence imaging system which(More)
The microsomal prostaglandin E2 synthase 1 (mPGES-1) became a desirable target in recent years for the research of new anti-inflammatory drugs. Even though many potent inhibitors of human mPGES-1, tested in vitro assay systems, have been synthesized, they all failed in preclinical trials in rodent models of inflammation, due to the lack of activity on(More)
BACKGROUND 5-LO is an important enzyme involved in the biosynthesis of leukotrienes, which are lipid mediators of immune and inflammation responses, with important roles in respiratory disease, cardiovascular disease, immune responses and certain types of cancer. Therefore, this enzyme has been investigated as a potential target for the treatment of these(More)
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