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The Journal of Neuroscience, September 22, 2004, 24(38):8237-8244; doi:10.1523/JNEUROSCI.1089-04.2004
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Neurobiology of Disease
Tumor Necrosis Factor-Like Weak Inducer of Apoptosis-Induced Neurodegeneration
Ioana Potrovita,1
Wen Zhang,1
Linda Burkly,3
Kyungmin Hahm,3
John Lincecum,3
Monica Z. Wang,3
Martin H. Maurer,2
Moritz Rossner,4
Armin Schneider,4 and
Markus Schwaninger1
Departments of 1Neurology and 2Physiology and Pathophysiology, University of Heidelberg, D-69120 Heidelberg, Germany, 3Biogen Idec, Inc., Cambridge, Massachusetts 02142, and 4Axaron Bioscience AG, D-69120 Heidelberg, Germany
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) is a member of the tumor necrosis factor (TNF) family of cytokines. It has proangiogenic and proinflammatory properties in vivo and induces cell death in tumor cell lines. TWEAK effects are mediated by the membrane receptor Fn14. In a systematic search for genes regulated in a murine stroke model with the tag-sequencing technique massively parallel signature sequencing, we have identified TWEAK as an induced gene. After 24 hr of focal cerebral ischemia in vivo or oxygen glucose deprivation in primary cortical neurons, both TWEAK and its receptor Fn14 were significantly upregulated. TWEAK induced cell death in primary neurons. Transfection of a nuclear factor (NF)- B-luciferase fusion gene demonstrated that TWEAK stimulated transcriptional activity of NF-B through Fn14 and the IB kinase. Inhibition of NF-B reduced TWEAK-stimulated neuronal cell death, suggesting that NF-B mediates TWEAK-induced neurodegeneration at least in part. Intraperitoneal injection of a neutralizing anti-TWEAK antibody significantly reduced the infarct size after 48 hr of permanent cerebral ischemia. In summary, our data show that TWEAK induces neuronal cell death and is involved in neurodegeneration in vivo.
Key words: stroke; TWEAK; Fn14; NF-B; transcriptional profiling; neurodegeneration
Received March 24, 2004;
revised July 21, 2004;
accepted July 21, 2004.
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