PUBLICATION

Pharmacological Enhancement of Regeneration-Dependent Regulatory T Cell Recruitment in Zebrafish

Authors
Zwi, S.F., Choron, C., Zheng, D., Nguyen, D., Zhang, Y., Roshal, C., Kikuchi, K.
ID
ZDB-PUB-191023-3
Date
2019
Source
International Journal of Molecular Sciences   20(20): (Journal)
Registered Authors
Kikuchi, Kazu, Zhang, Yuxi
Keywords
dopamine signaling, pramipexole, regulatory T cell, small molecule screen, zebrafish
MeSH Terms
  • Animals
  • Cell Movement/drug effects*
  • Cell Movement/immunology*
  • Dopamine/metabolism
  • Pramipexole/pharmacology
  • Regeneration*
  • Signal Transduction
  • T-Lymphocytes, Regulatory/drug effects*
  • T-Lymphocytes, Regulatory/physiology*
  • Zebrafish/physiology*
PubMed
31635133 Full text @ Int. J. Mol. Sci.
Abstract
Regenerative capacity varies greatly between species. Mammals are limited in their ability to regenerate damaged cells, tissues and organs compared to organisms with robust regenerative responses, such as zebrafish. The regeneration of zebrafish tissues including the heart, spinal cord and retina requires foxp3a+ zebrafish regulatory T cells (zTregs). However, it remains unclear whether the muted regenerative responses in mammals are due to impaired recruitment and/or function of homologous mammalian regulatory T cell (Treg) populations. Here, we explore the possibility of enhancing zTreg recruitment with pharmacological interventions using the well-characterized zebrafish tail amputation model to establish a high-throughput screening platform. Injury-infiltrating zTregs were transgenically labelled to enable rapid quantification in live animals. We screened the NIH Clinical Collection (727 small molecules) for modulators of zTreg recruitment to the regenerating tissue at three days post-injury. We discovered that the dopamine agonist pramipexole, a drug currently approved for treating Parkinson's Disease, specifically enhanced zTreg recruitment after injury. The dopamine antagonist SCH-23390 blocked pramipexole activity, suggesting that peripheral dopaminergic signaling may regulate zTreg recruitment. Similar pharmacological approaches for enhancing mammalian Treg recruitment may be an important step in developing novel strategies for tissue regeneration in humans.
Genes / Markers
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Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping