Abstract
Synaptic plasticity refers to activity-dependent synaptic strengthening or weakening between neurons. It is usually associated with homosynaptic plasticity, which refers to a synaptic junction controlled by interactions between specific neurons. Heterosynaptic plasticity, on the other hand, lacks this specificity. It involves much larger populations of synapses and neurons and can be associated with changes in synaptic strength due to nonlocal alterations in the ambient electrochemical environment. This paper presents specific examples demonstrating how variations in the ambient electrochemical environment of lipid membranes can impact the nonlinear dynamical behaviors of memristive and memcapacitive systems in droplet interface bilayers (DIBs). Examples include the use of pH as a modulatory factor that alters the voltage-dependent memristive behavior of alamethicin ion channels in DIB lipid bilayers, and the discovery of long-term potentiation (LTP) in a lipid bilayer-only system after application of electrical stimulation protocols.
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Acknowledgments
J.K. and C.P.C. are supported through the Scientific User Facilities Division of the Department of Energy (DOE) Office of Science, sponsored by the Basic Energy Science (BES) Program, DOE Office of Science, under Contract No. DE-AC05-00OR22725. D.B. is supported through the National Science Foundation, Division of Molecular and Cellular Biosciences (MCB), under contract No. 2219289. Manuscript preparation was performed at the Center for Nanophase Materials Sciences, a US DOE Office of Science User Facility.
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This study is supported by the Basic Energy Sciences, DE-AC05-00OR22725, to C. Patrick Collier.
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Bolmatov, D., Katsaras, J. & Patrick Collier, C. Heterosynaptic plasticity in memristive and memcapacitive lipid bilayers: A snapshot review. MRS Advances (2024). https://doi.org/10.1557/s43580-024-00800-9
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DOI: https://doi.org/10.1557/s43580-024-00800-9