Targeting mtDNA to Modulate Mitochondrial Dysfunction in Neurodegenerative Diseases

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Mitochondrial dysfunction is a hallmark of neurodegenerative diseases like Alzheimer's and Parkinson's.
• Secondary mitochondrial DNA (mtDNA) damage and heteroplasmy shifts can worsen neuronal vulnerability.

Purpose of the Study:

• To review mitochondrial dysfunction in neurodegenerative diseases.
• To evaluate current and emerging mtDNA editing techniques.
• To highlight translational barriers for mtDNA-targeted therapies.

Main Methods:

• Review of scientific literature on mitochondrial dysfunction and mtDNA editing.
• Analysis of gene editing technologies including ZFNs, TALENs, DddA-base editors, and CRISPR/Cas systems.
• Examination of limitations and challenges in mtDNA editing delivery and application.

Main Results:

• mtDNA alterations exacerbate neurodegenerative disease pathology.
• Various mtDNA editing platforms exist, each with unique strengths and limitations.
• CRISPR/Cas systems face challenges with guiding RNA import into mitochondria.

Conclusions:

• mtDNA-targeted interventions show potential as disease-modifying or adjunctive therapies.
• These approaches are unlikely to be curative on their own.
• Further research is needed to overcome delivery and specificity challenges in mtDNA editing.