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Animal Mitochondrial Genetics

Animal Mitochondrial Genetics

Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...

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MPV17 Gene Variant Mutation Presenting as Leucoencephalopathy with Peripheral Neuropathy.

Ravindranadh Chowdary Mundlamuri¹, Pradeep Divate², Parthasarthy Satishchandra³

¹Department of Neurology, NIMHANS, Bengaluru, Karnataka, India.

Neurology India

|January 4, 2022

Summary

This summary is machine-generated.

Mitochondrial DNA depletion syndromes (MDS) are rare genetic disorders. This report details a novel MPV17 gene mutation in India causing neuropathy, leucoencephalopathy, and liver issues.

Keywords:

MPV17 gene Mitochondrial depletion syndromes neuropathy and leukoencephalopathy

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Area of Science:

Genetics
Neurology
Biochemistry

Background:

Mitochondrial DNA depletion syndromes (MDS) represent a group of rare genetic disorders characterized by decreased mitochondrial DNA copy number.
These syndromes exhibit significant genotypic and phenotypic heterogeneity, posing diagnostic challenges.

Observation:

This report presents the first case from India of a patient with a mutation in the MPV17 gene, which encodes a mitochondrial inner membrane protein.
The patient exhibited a complex clinical presentation including neuropathy and leucoencephalopathy.

Findings:

The MPV17 gene variant mutation was associated with subclinical hepatic dysfunction, highlighting the systemic impact of this genetic defect.
Detailed clinical and neuroimaging descriptions provide valuable insights into the phenotype of this specific MPV17 mutation.

Implications:

This case expands the known spectrum of MPV17 mutations and their clinical manifestations in MDS.
Early identification and characterization of such mutations are crucial for timely diagnosis and management of mitochondrial disorders.