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PINK1 Is Necessary for Long Term Survival and Mitochondrial Function in Human Dopaminergic Neurons

Wood-Kaczmar, A, Gandhi, S, Yao, Z, Abramov, ASY, Miljan, EA, Keen, G, Stanyer, L, Hargreaves, IP, Klupsch, K, Deas, E, Downward, J, Mansfield, L, Jat, P, Taylor, J, Heales, S, Duchen, MR, Latchman, D, Tabrizi, SJ and Wood, NW (2008) PINK1 Is Necessary for Long Term Survival and Mitochondrial Function in Human Dopaminergic Neurons. PLoS One, 3 (6). ISSN 1932-6203

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Abstract

Parkinson's disease (PD) is a common age-related neurodegenerative disease and it is critical to develop models which recapitulate the pathogenic process including the effect of the ageing process. Although the pathogenesis of sporadic PD is unknown, the identification of the mendelian genetic factor PINK1 has provided new mechanistic insights. In order to investigate the role of PINK1 in Parkinson's disease, we studied PINK1 loss of function in human and primary mouse neurons. Using RNAi, we created stable PINK1 knockdown in human dopaminergic neurons differentiated from foetal ventral mesencephalon stem cells, as well as in an immortalised human neuroblastoma cell line. We sought to validate our findings in primary neurons derived from a transgenic PINK1 knockout mouse. For the first time we demonstrate an age dependent neurodegenerative phenotype in human and mouse neurons. PINK1 deficiency leads to reduced long-term viability in human neurons, which die via the mitochondrial apoptosis pathway. Human neurons lacking PINK1 demonstrate features of marked oxidative stress with widespread mitochondrial dysfunction and abnormal mitochondrial morphology. We report that PINK1 plays a neuroprotective role in the mitochondria of mammalian neurons, especially against stress such as staurosporine. In addition we provide evidence that cellular compensatory mechanisms such as mitochondrial biogenesis and upregulation of lysosomal degradation pathways occur in PINK1 deficiency. The phenotypic effects of PINK1 loss-of-function described here in mammalian neurons provides mechanistic insight into the age-related degeneration of nigral dopaminergic neurons seen in PD.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Multidisciplinary Sciences; Science & Technology - Other Topics; DROSOPHILA-PARKIN MUTANTS; OXIDATIVE STRESS; GENE-EXPRESSION; MUTATIONS; DISEASE; GLUTATHIONE; APOPTOSIS; INACTIVATION; DYSFUNCTION; PROTECTS
Subjects: Q Science > QH Natural history > QH426 Genetics
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Public Library of Science
Related URLs:
Date Deposited: 22 Sep 2020 11:04
Last Modified: 22 Sep 2020 11:15
DOI or Identification number: 10.1371/journal.pone.0002455
URI: https://researchonline.ljmu.ac.uk/id/eprint/13689

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