Cell Reports (Nov 2024)

Spatial, transcriptomic, and epigenomic analyses link dorsal horn neurons to chronic pain genetic predisposition

  • Cynthia M. Arokiaraj,
  • Michael J. Leone,
  • Michael Kleyman,
  • Alexander Chamessian,
  • Myung-Chul Noh,
  • BaDoi N. Phan,
  • Bettega C. Lopes,
  • Kelly A. Corrigan,
  • Vijay Kiran Cherupally,
  • Deepika Yeramosu,
  • Michael E. Franusich,
  • Riya Podder,
  • Sumitra Lele,
  • Stephanie Shiers,
  • Byungsoo Kang,
  • Meaghan M. Kennedy,
  • Viola Chen,
  • Ziheng Chen,
  • Hansruedi Mathys,
  • Richard P. Dum,
  • David A. Lewis,
  • Yawar Qadri,
  • Theodore J. Price,
  • Andreas R. Pfenning,
  • Rebecca P. Seal

Journal volume & issue
Vol. 43, no. 11
p. 114876

Abstract

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Summary: Key mechanisms underlying chronic pain occur within the dorsal horn. Genome-wide association studies (GWASs) have identified genetic variants predisposed to chronic pain. However, most of these variants lie within regulatory non-coding regions that have not been linked to spinal cord biology. Here, we take a multi-species approach to determine whether chronic pain variants impact the regulatory genomics of dorsal horn neurons. First, we generate a large rhesus macaque single-nucleus RNA sequencing (snRNA-seq) atlas and integrate it with available human and mouse datasets to produce a single unified, species-conserved atlas of neuron subtypes. Cellular-resolution spatial transcriptomics in mouse shows the precise laminar location of these neuron subtypes, consistent with our analysis of neuron-subtype-selective markers in macaque. Using this cross-species framework, we generate a mouse single-nucleus open chromatin atlas of regulatory elements that shows strong and selective relationships between the neuron-subtype-specific chromatin regions and variants from major chronic pain GWASs.

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