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Updated: Aug 6, 2026
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The Use of Primary Human Fibroblasts for Monitoring Mitochondrial Phenotypes in the Field of Parkinson's Disease
Published on: October 3, 2012
Biallelic hexose-6-phosphate dehydrogenase variants cause mitochondrial dysfunction underlying Parkinson's disease
Miao Zhao1, Yuwen Zhao2, Juan Huang3
1Department of Neurology, Xiangya Hospital, Central South University, Changsha 410008, China; Centre for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410078, China.
Science Bulletin
|July 16, 2026
Summary
Biallelic variants in hexose-6-phosphate dehydrogenase (H6PD) are a novel cause of Parkinson's disease (PD). H6PD is crucial for maintaining cellular redox balance and mitochondrial function, supporting dopaminergic neuron survival.
Area of Science:
- Neuroscience
- Genetics
- Cell Biology
Background:
- Parkinson's disease (PD) is a progressive neurodegenerative disorder with complex genetic and environmental influences.
- The role of endoplasmic reticulum (ER) pathways in PD pathogenesis is an area of ongoing investigation.
Purpose of the Study:
- To identify novel genetic contributors to Parkinson's disease.
- To investigate the function of hexose-6-phosphate dehydrogenase (H6PD) in neuronal health and its potential role in PD.
Main Methods:
- Whole-exome and whole-genome sequencing in large cohorts of PD patients and controls.
- Functional studies in cell cultures, Drosophila, and mouse models.
- Assessment of mitochondrial function, redox status, ER-mitochondria coupling, and mitophagy.
Main Results:
- Identified 13 biallelic H6PD variants in eight PD probands.
- H6PD depletion impairs NADPH generation, disrupts ER-mitochondria coupling, and compromises mitochondrial function and mitophagy.
- H6PD variants identified in PD patients lose protective functions; H6PD deficiency exacerbates neurodegeneration in model organisms.
Conclusions:
- Biallelic variants in H6PD represent a novel genetic cause of Parkinson's disease.
- H6PD is essential for maintaining ER redox homeostasis, ER-mitochondria communication, and dopaminergic neuron survival.
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