Exploring therapeutic strategies for infantile neuronal axonal dystrophy (INAD/PARK14)
- Baylor College of Medicine, United States
- New York Stem Cell Foundation, United States
- INADcure Foundation, United States
- Mayo Clinic, United States
Abstract
Infantile Neuroaxonal Dystrophy (INAD) is caused by recessive variants in PLA2G6 and is a lethal pediatric neurodegenerative disorder. Loss of the Drosophila homolog of PLA2G6, leads to ceramide accumulation, lysosome expansion, and mitochondrial defects. Here, we report that retromer function, ceramide metabolism, the endolysosomal pathway, and mitochondrial morphology are affected in INAD patient-derived neurons. We show that in INAD mouse models the same features are affected in Purkinje cells, arguing that the neuropathological mechanisms are evolutionary conserved and that these features can be used as biomarkers. We tested 20 drugs that target these pathways and found that Ambroxol, Desipramine, Azoramide, and Genistein alleviate neurodegenerative phenotypes in INAD flies and INAD patient-derived NPCs. We also develop an AAV-based gene therapy approach that delays neurodegeneration and prolongs lifespan in an INAD mouse model.
Data availability
All data generated or analyzed during this study are included in the manuscript and supporting file; Source Data files have been provided for Figures 1, 3, 4 and Suppl. Figure 1.
Article and author information
Author details
Funding
Baylor College of Medicine (P50HD103555)
- Hugo J Bellen
Huffington Foundation
- Hugo J Bellen
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: All experimental animals were treated in compliance with the United States Department of Health and Human Services and the Baylor College of Medicine IACUC guidelines. Protocol (AN-5596).
Copyright
© 2023, Lin et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
Metrics
-
- 2,455
- views
-
- 374
- downloads
-
- 10
- citations
Views, downloads and citations are aggregated across all versions of this paper published by eLife.
Citations by DOI
-
- 10
- citations for umbrella DOI https://doi.org/10.7554/eLife.82555
Download links
A two-part list of links to download the article, or parts of the article, in various formats.
Downloads (link to download the article as PDF)
Open citations (links to open the citations from this article in various online reference manager services)
Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)
Exploring therapeutic strategies for infantile neuronal axonal dystrophy (INAD/PARK14)
eLife 12:e82555.
https://doi.org/10.7554/eLife.82555
