PMID- 28210211 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 1662-5099 (Print) IS - 1662-5099 (Electronic) IS - 1662-5099 (Linking) VI - 10 DP - 2017 TI - APP as a Protective Factor in Acute Neuronal Insults. PG - 22 LID - 10.3389/fnmol.2017.00022 [doi] LID - 22 AB - Despite its key role in the molecular pathology of Alzheimer's disease (AD), the physiological function of amyloid precursor protein (APP) is unknown. Increasing evidence, however, points towards a neuroprotective role of this membrane protein in situations of metabolic stress. A key observation is the up-regulation of APP following acute (stroke, cardiac arrest) or chronic (cerebrovascular disease) hypoxic-ischemic conditions. While this mechanism may increase the risk or severity of AD, APP by itself or its soluble extracellular fragment APPsalpha can promote neuronal survival. Indeed, different animal models of acute hypoxia-ischemia, traumatic brain injury (TBI) and excitotoxicity have revealed protective effects of APP or APPsalpha. The underlying mechanisms involve APP-mediated regulation of calcium homeostasis via NMDA receptors (NMDAR), voltage-gated calcium channels (VGCC) or internal calcium stores. In addition, APP affects the expression of survival- or apoptosis-related genes as well as neurotrophic factors. In this review, we summarize the current understanding of the neuroprotective role of APP and APPsalpha and possible implications for future research and new therapeutic strategies. FAU - Hefter, Dimitri AU - Hefter D AD - Institute of Physiology and Pathophysiology, Heidelberg UniversityHeidelberg, Germany; Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg UniversityMannheim, Germany. FAU - Draguhn, Andreas AU - Draguhn A AD - Institute of Physiology and Pathophysiology, Heidelberg University Heidelberg, Germany. LA - eng PT - Journal Article PT - Review DEP - 20170202 PL - Switzerland TA - Front Mol Neurosci JT - Frontiers in molecular neuroscience JID - 101477914 PMC - PMC5288400 OTO - NOTNLM OT - Alzheimer OT - amyloid precursor protein OT - calcium toxicity OT - cell death OT - ischemia OT - neuroprotection OT - stroke OT - traumatic brain injury EDAT- 2017/02/18 06:00 MHDA- 2017/02/18 06:01 PMCR- 2017/01/01 CRDT- 2017/02/18 06:00 PHST- 2016/11/07 00:00 [received] PHST- 2017/01/16 00:00 [accepted] PHST- 2017/02/18 06:00 [entrez] PHST- 2017/02/18 06:00 [pubmed] PHST- 2017/02/18 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fnmol.2017.00022 [doi] PST - epublish SO - Front Mol Neurosci. 2017 Feb 2;10:22. doi: 10.3389/fnmol.2017.00022. eCollection 2017.