Alzheimer's disease risk gene BIN1 induces Tau-dependent network hyperexcitability — MEA Axion Biosciences Maestro Recordings, Figure 6

Author ORCID

Yuliya Voskobiynyk 0000-0003-4169-3002

Mohhamad Waqas 0000-0002-4633-4167

Erik Roberson 0000-0002-1810-9763

Publication Date

8-19-2020

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.

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Dryad

Distribution License

CC0 1.0 Universal - No copyright; this work is in the public domain

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