Alzheimer's disease risk gene BIN1 induces Tau-dependent network hyperexcitability
- University of Alabama at Birmingham, United States
Abstract
Genome-wide association studies identified the BIN1 locus as a leading modulator of genetic risk in Alzheimer's disease (AD). One limitation in understanding BIN1's contribution to AD is its unknown function in the brain. AD-associated BIN1 variants are generally noncoding and likely change expression. Here, we determined the effects of increasing expression of the major neuronal isoform of human BIN1 in cultured rat hippocampal neurons. Higher BIN1 induced network hyperexcitability on multielectrode arrays, increased frequency of synaptic transmission, and elevated calcium transients, indicating that increasing BIN1 drives greater neuronal activity. In exploring the mechanism of these effects on neuronal physiology, we found that BIN1 interacted with L-type voltage-gated calcium channels (LVGCCs) and that BIN1–LVGCC interactions were modulated by Tau in rat hippocampal neurons and mouse brain. Finally, Tau reduction prevented BIN1-induced network hyperexcitability. These data shed light on BIN1's neuronal function and suggest that it may contribute to Tau-dependent hyperexcitability in AD.
Data availability
All data generated or analysed during this study are included in the manuscript and supporting files. Source data files have been provided for Figures 6: high throughput raw electrophysiologic recordings of neuronal activity using Axion Biosciences Maesto are deposited at: https://uab.box.com/s/rdjp74ba7stgb2dfrxgbyj507b94tjhn.Brief Analysis used is described in the methods section, in-depth analysis description is publicly available at: https://www.axionbiosystems.com/products/axis-software.
Article and author information
Author details
Funding
National Institutes of Health (RF1AG059405)
- Erik D Roberson
National Institutes of Health (R01NS075487)
- Erik D Roberson
National Institutes of Health (R01MH114990)
- Jeremy J Day
National Institutes of Health (T32NS095775)
- Yuliya Voskobiynyk
National Institutes of Health (T32NS061788)
- Jonathan R Roth
Alzheimer's Association
- Erik D Roberson
Weston Brain Institute
- Jonathan R Roth
- Travis Rush
- Erik D Roberson
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: This study was performed in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. All of the animals were handled according to approved institutional animal care and use committee (IACUC) protocols (#20450) of the University of Alabama at Birmingham. The protocol was approved by the Committee on the Ethics of Animal Experiments of the University of Alabama at Birmingham.
Copyright
© 2020, Voskobiynyk et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Alzheimer's disease risk gene BIN1 induces Tau-dependent network hyperexcitability
eLife 9:e57354.
https://doi.org/10.7554/eLife.57354
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