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A transcriptomic resource for glial GABA-associated ASH neuronal aging and candidate pathways.

Umar Al-Sheikh1,2,3,4,5, Hankui Cheng1,3,4,5, Ahmed Abdulsalam Ali Bakrbaldawi3,4,5,6

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Restoring GABA synthesis in C. elegans glia reduced age-related neurodegeneration. This study reveals Hedgehog signaling and HSF-1 as key pathways involved in glial GABA-mediated neuroprotection during aging.

Keywords:
C. elegansGABAglia-neuronal interactionneuronal agingtranscriptomic analyses

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Area of Science:

  • Neuroscience
  • Genomics
  • Aging Research

Background:

  • Neuronal aging is linked to neurodegeneration, partly due to GABA dysregulation.
  • Restoring GABA synthesis in specific glial cells (AMsh) in C. elegans mitigates age-related neurodegeneration.

Purpose of the Study:

  • To provide a transcriptomic resource for glial GABA modulation during neuronal aging.
  • To identify molecular pathways involved in glial GABA-associated neuroprotection.

Main Methods:

  • RNA-sequencing of ASH neurons from wild-type, GABA-deficient mutants, and rescued mutants in C. elegans.
  • Differential gene expression analysis (DESeq2) and gene set enrichment analysis (clusterProfiler).
  • Transcriptomic comparison between glial and neuronal cells in young worms.

Main Results:

  • Distinct transcriptional profiles were observed across aging groups.
  • Upregulation of Hedgehog signaling pathway (TRA-1/GLI) and downregulation of HSF-1 in the glial rescue group.
  • Identification of potential glia-neuron crosstalk mechanisms.

Conclusions:

  • This study provides a valuable transcriptomic resource for understanding glial GABA's role in neuronal aging.
  • Identified Hedgehog signaling and HSF-1 as potential mediators of glial GABA-associated neuroprotection.
  • Offers molecular insights for dissecting neurodegeneration and identifying therapeutic targets.