eLife (Sep 2021)

A zebrafish screen reveals Renin-angiotensin system inhibitors as neuroprotective via mitochondrial restoration in dopamine neurons

  • Gha-Hyun J Kim,
  • Han Mo,
  • Harrison Liu,
  • Zhihao Wu,
  • Steven Chen,
  • Jiashun Zheng,
  • Xiang Zhao,
  • Daryl Nucum,
  • James Shortland,
  • Longping Peng,
  • Mannuel Elepano,
  • Benjamin Tang,
  • Steven Olson,
  • Nick Paras,
  • Hao Li,
  • Adam R Renslo,
  • Michelle R Arkin,
  • Bo Huang,
  • Bingwei Lu,
  • Marina Sirota,
  • Su Guo

DOI
https://doi.org/10.7554/eLife.69795
Journal volume & issue
Vol. 10

Abstract

Read online

Parkinson’s disease (PD) is a common neurodegenerative disorder without effective disease-modifying therapeutics. Here, we establish a chemogenetic dopamine (DA) neuron ablation model in larval zebrafish with mitochondrial dysfunction and robustness suitable for high-content screening. We use this system to conduct an in vivo DA neuron imaging-based chemical screen and identify the Renin-Angiotensin-Aldosterone System (RAAS) inhibitors as significantly neuroprotective. Knockdown of the angiotensin receptor 1 (agtr1) in DA neurons reveals a cell-autonomous mechanism of neuroprotection. DA neuron-specific RNA-seq identifies mitochondrial pathway gene expression that is significantly restored by RAAS inhibitor treatment. The neuroprotective effect of RAAS inhibitors is further observed in a zebrafish Gaucher disease model and Drosophila pink1-deficient PD model. Finally, examination of clinical data reveals a significant effect of RAAS inhibitors in delaying PD progression. Our findings reveal the therapeutic potential and mechanisms of targeting the RAAS pathway for neuroprotection and demonstrate a salient approach that bridges basic science to translational medicine.

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