Journal
SCIENCE
Volume 363, Issue 6423, Pages 143-143Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao4827
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Funding
- Alzheimer's Association Research Fellowship [AARF-16-442885]
- Stichting Voor Alzheimer Onderzoek Pilot Grant [16011]
- Agency for Innovation by Science and Technology in Flanders [IWT 141698]
- National Science Foundation [BRAIN EAGER MCB-1450895, IOS-1755189]
- Robert Wood Johnson Foundation [74260]
- VUB onderzoeksfonds (SRP13)
- European Research Council (ERC) [724866]
- FWO [G.0946.16N, G.0D98.17N, G.0654.15N]
- Vlaams Initiatief voor Netwerken voor Dementie Onderzoek (VIND) [135043]
- KU Leuven Methusalem Grant
- ERC [311083]
- FWO Odysseus Grant
- Arthur Bax and Anna Vanluffelen chair for Alzheimer's disease, Opening the Future of the Leuven Universiteit Fonds (LUF)
- Geneeskundige Stichting Koningin Elisabeth
- [RO1AG061787]
- European Research Council (ERC) [724866, 311083] Funding Source: European Research Council (ERC)
- MRC [UKDRI-1004] Funding Source: UKRI
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Amyloid-beta precursor protein (APP) is central to the pathogenesis of Alzheimer's disease, yet its physiological function remains unresolved. Accumulating evidence suggests that APP has a synaptic function mediated by an unidentified receptor for secreted APP (sAPP). Here we show that the sAPP extension domain directly bound the sushi 1 domain specific to the gamma-aminobutyric acid type B receptor subunit 1a (GABA(B)R1a). sAPP-GABA(B)R1a binding suppressed synaptic transmission and enhanced short-term facilitation in mouse hippocampal synapses via inhibition of synaptic vesicle release. A 17-amino acid peptide corresponding to the GABA(B)R1a binding region within APP suppressed in vivo spontaneous neuronal activity in the hippocampus of anesthetized Thy1-GCaMP6s mice. Our findings identify GABA(B)R1a as a synaptic receptor for sAPP and reveal a physiological role for sAPP in regulating GABA(B)R1a function to modulate synaptic transmission.
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