Abstract
Emerging evidence suggests that Parkinson's disease (PD), besides being an age-associated disorder, might also have a neurodevelopment component. Disruption of mitochondrial homeostasis has been highlighted as a crucial cofactor in its etiology. Here, we show that PD patient-specific human neuroepithelial stem cells (NESCs), carrying the LRRK2-G2019S mutation, recapitulate key mitochondrial defects previously described only in differentiated dopaminergic neurons. By combining high-content imaging approaches, 3D image analysis, and functional mitochondrial readouts we show that LRRK2-G2019S mutation causes aberrations in mitochondrial morphology and functionality compared with isogenic controls. LRRK2-G2019S NESCs display an increased number of mitochondria compared with isogenic control lines. However, these mitochondria are more fragmented and exhibit decreased membrane potential. Functional alterations in LRRK2-G2019S cultures are also accompanied by a reduced mitophagic clearance via lysosomes. These findings support the hypothesis that preceding mitochondrial developmental defects contribute to the manifestation of the PD pathology later in life.
| Original language | English |
|---|---|
| Pages (from-to) | 878-889 |
| Number of pages | 12 |
| Journal | Stem Cell Reports |
| Volume | 12 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 14 May 2019 |
| Externally published | Yes |
Keywords
- LRRK2
- Parkinson's disease
- autophagy
- mitochondria
- mitophagy
- neurodevelopment
- stem cells