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Transcriptomics and Proteomics Identify Serotonin Transporter as a Promising Therapeutic Target for Essential Tremor.

Lingbing Wang1, Zhuofan Zhou1, Suzhen Lin1

  • 1Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Molecular & Cellular Proteomics : MCP
|November 5, 2025
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Summary

Essential tremor (ET) research reveals serotonin transporter (SERT) upregulation in the cerebellum causes depleted serotonin levels, leading to tremor. Targeting SERT may offer new therapeutic strategies for this common movement disorder.

Keywords:
essential tremorproteomic analysisserotonin transportertherapeutic targettranscriptomic sequencing

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Essential tremor (ET) is a common movement disorder linked to cerebellar dysfunction.
  • Current treatments for ET are limited due to an incomplete understanding of its molecular basis.
  • The harmaline-induced tremor mouse model is crucial for studying ET mechanisms.

Purpose of the Study:

  • To investigate the molecular mechanisms of cerebellar dysfunction in the harmaline-induced tremor model.
  • To identify key molecular players involved in ET pathogenesis.
  • To explore potential therapeutic targets for essential tremor.

Main Methods:

  • Combined Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS) and RNA sequencing (RNA-Seq) for multi-omics profiling of mouse cerebellum.
  • KEGG pathway enrichment analysis to identify significantly dysregulated molecules.
  • Pharmacological inhibition and genetic knockdown of the serotonin transporter (SERT).

Main Results:

  • Identified 5194 correlated coding molecules, with 19 significantly dysregulated in the harmaline model.
  • Cerebellar serotonin transporter (SERT) was identified as a key molecule.
  • SERT upregulation in cerebellar Purkinje cells was validated, leading to depleted serotonin and attenuated tremor upon SERT inhibition or knockdown.

Conclusions:

  • Harmaline-induced SERT upregulation in the cerebellum contributes to tremor pathogenesis by depleting serotonin levels.
  • SERT represents a potential molecular target for developing novel therapeutic interventions for essential tremor.
  • This study provides critical insights into the molecular pathology of essential tremor.