MINI REVIEW article

Front. Cell. Neurosci.

Sec. Cellular Neuropathology

Volume 19 - 2025 | doi: 10.3389/fncel.2025.1638627

This article is part of the Research TopicImpacts of cytoskeletal dysregulation on spinogenesisView all articles

Proximity labeling uncovers the synaptic proteome under physiological and pathological conditions Author names

Provisionally accepted
  • Kyushu University, Fukuoka, Japan

The final, formatted version of the article will be published soon.

Synapses are fundamental units of neurotransmission and play a central role in the formation and function of neural circuits. These dynamic structures exhibit morphological and functional plasticity in response to experience and activity, supporting various brain functions. Their molecular composition includes diverse membrane and cytoskeletal proteins that mediate intercellular signaling, regulate synaptic plasticity, and maintain structural stability. Disruptions in these protein networks, often referred to as synaptopathies, are closely linked to psychiatric and neurological disorders. Such disruptions commonly manifest as region-specific changes in synapse number, morphology, or signaling efficacy. Although a large number of synaptic proteins have been identified through conventional proteomic approaches, our understanding of synaptic specificity and plasticity remains limited. This is primarily due to insufficient spatial resolution, lack of cell-type specificity, and challenges in applying these methods to intact neural circuits in vivo. Recent advances in proximity labeling techniques such as BioID and APEX can spatial proteomics limiting cell compartments and cell types. BioID also enables proteomic analysis under both physiological and pathological conditions in vivo. These technologies allow unbiased, high-resolution profiling of protein networks in specific synapse types, synaptic clefts, and cellular interfaces, thereby providing new insights into the molecular basis of synaptic diversity and function. In this review, we summarize recent developments in synaptic proteomics enabled by proximity labeling. We also discuss how these approaches have advanced our understanding of synapse-specific molecular architecture and their potential to inform the mechanisms of synapse-related brain disorders, as well as the development of targeted diagnostic and therapeutic strategies.

Keywords: synapse, Proteomics, BioID, spine formation, Cytoskeleton, synaptopathy

Received: 31 May 2025; Accepted: 02 Jul 2025.

Copyright: © 2025 Matsubayashi and Takano. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Tetsuya Takano, Kyushu University, Fukuoka, Japan

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