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1 Haldeman Laboratory of Molecular and Cellular Neurobiology and 2 Roberts Center for Alzheimer's Research, Sun Health Research Institute, Sun City, AZ 85351 3 Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115 4 Novartis Pharma Ltd., Nervous System Research, CH-4002 Basel, Switzerland
Correspondence to Yong Shen: yong.shen{at}sunhealth.org
Abstract:
The tumor necrosis factor type 1 death receptor (TNFR1) contributesto apoptosis. TNFR1, a subgroup of the TNFR superfamily, containsa cytoplasmic death domain. We recently demonstrated that theTNFR1 cascade is required for amyloid ß protein (Aß)–inducedneuronal death. However, the function of TNFR1 in Aßplaque pathology and amyloid precursor protein (APP) processingin Alzheimer's disease (AD) remains unclear. We report thatthe deletion of the TNFR1 gene in APP23 transgenic mice (APP23/TNFR1–/–)inhibits Aß generation and diminishes Aßplaque formation in the brain. Genetic deletion of TNFR1 leadsto reduced ß-secretase 1 (BACE1) levels and activity.TNFR1 regulates BACE1 promoter activity via the nuclear factor-Bpathway, and the deletion of TNFR1 in APP23 transgenic miceprevents learning and memory deficits. These findings suggestthat TNFR1 not only contributes to neurodegeneration but alsothat it is involved in APP processing and Aß plaqueformation. Thus, TNFR1 is a novel therapeutic target for AD.
P. He and Z. Zhong contributed equally to this paper.
Abbreviations used in this paper: Aß, amyloid ßprotein; AD, Alzheimer's disease; ANOVA, analysis of variance;APP, amyloid precursor protein; BACE1, ß-secretase1; CAA, cerebral amyloid angiopathy; IDE, insulin degradationenzyme; NEP, neprilysin; NF-B, nuclear factor B; TNFR1, TNFtype 1 death receptor; vWF, von Willebrand factor.
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