Mitochondrial DNA depletion syndrome presenting with ataxia and external ophthalmoplegia: Case report

"Mitochondria" partially autonomous sophisticated cellular organelle involved in a wide range of crucial cellular functions, well known as the power house of the cell where ATP (adenosine triphosphate) production takes place, that is the cellular source of energy.Mitochondria has its own genome, however proper functioning of the mitochondria is dependent upon the coordinated expression of both nuclear and mitochondrial encoded gene products. Peculiar maternal inheritance of mitochondrial DNA has led the scientists to think about mitochondrial donation as a solution to maternally inherited mitochondriopathy "Three parent baby", raising many ethical and scientific issues, concerns about safety of the procedure, long term outcome and effect of genetic modification are still questionable.Mitochondrial DNA has a higher mutation rate compared to nuclear DNA. Mitochondrial research has revealed a lot about methods of its DNA repair emphasizing the role of nuclear encoded products in this process.Mitochondrial diseases are clinically and genetically diverse, fortunately next generation sequencing (NGS) technologies have made a breakthrough in mitochondrial disorders, the whole mitochondrial genome has been sequenced with more than 250 nuclear encoded genes associated with mitochondrial syndromes identified to date, It unraveled the role of mitochondrial disorders in neurodegenerative disorders. However many pathogenic candidate genes remain uncharacterized even with whole exome sequencing (WES).In this chapter here we handle cases with various neurodegenerative diseases that have been genetically diagnosed thanks to NGS, revealing the role of mitochondrial dysfunction in neurodegeneration, offering a therapeutic target for these handicapping disorders.

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Mitochondrial Diseases as Model of Neurodegeneration

Selim

Hassaan

2017

Advances in Experimental Medicine and Biology

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Mitochondrial DNA depletion syndrome presenting with ataxia and external ophthalmoplegia: Case report

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Mitochondrial Diseases as Model of Neurodegeneration

Mitochondrial Diseases as Model of Neurodegeneration

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