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Abstract Title:

Sulforaphane suppresses LPS-induced inflammation in primary rat microglia.

Abstract Source:

Inflamm Res. 2010 Jun;59(6):443-50. Epub 2009 Nov 19. PMID: 19924513

Abstract Author(s):

Lars-Ove Brandenburg, Markus Kipp, Ralph Lucius, Thomas Pufe, Christoph J Wruck

Article Affiliation:

Department of Anatomy and Cell Biology, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany. lbrandenburg@ukaachen.de

Abstract:

OBJECTIVE AND DESIGN: The aim of this study was to investigate the signal transduction pathways involved in sulforaphane (SF) mediated inhibition of the inflammatory response to lipopolysaccharide (LPS). Additionally, we investigated the effects of SF and LPS on the activity of Nrf2. MATERIAL: Primary rat microglia and the murine microglia cell line BV2 were used. TREATMENT: Cells were treated with LPS with or without SF. METHODS: Cell viability was measured via WST-assay. Real-time RT-PCR was performed to analyze cytokine mRNA levels. The nitric oxide (NO) release was measured in LPS-stimulated microglia. The induction of various signal transduction pathways and Nrf2 was determined by Western blotting. NF-kappaB and AP-1 activation was measured by dual luciferase assay. RESULTS: We showed that SF attenuates the LPS-induced increase of IL-1beta, IL-6, and TNF-alpha expression in microglia. In addition, SF significantly decreases the NO in a concentration-dependent manner. SF inhibits LPS-stimulated ERK1/2 and JNK phosphorylation and thereby inhibits the LPS-induced activation of NF-kappaB- and activator protein-1 (AP-1). Moreover, SF and LPS together are able to induce Nrf2 activation. CONCLUSIONS: We showed that SF, and also LPS by itself, are able to activate the cell's defence against oxidative and electrophilic stress. We conclude that SF could be a candidate agent for anti-inflammatory treatment of the central nervous system.

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