Pathogenic mitochondrial DNA 3243A>G mutation: From genetics to phenotype.

Area of Science:

• Genetics
• Molecular Biology
• Mitochondrial Diseases

Background:

• The mitochondrial DNA (mtDNA) m.3243A>G mutation is a frequent cause of complex genetic disorders.
• Understanding this mutation's intricate genetics, molecular mechanisms, and diverse phenotypes is crucial for disease management.

Purpose of the Study:

• To systematically review the characteristics of the m.3243A>G mutation.
• To elucidate the relationship between genotype and phenotype for this mutation.
• To explore influencing factors and prevention strategies for mtDNA-related diseases.

Main Methods:

• Systematic literature review.
• Analysis of genetic characteristics, molecular mechanisms, and clinical phenotypes.
• Evaluation of precision medicine strategies for disease prevention.

Main Results:

• The m.3243A>G mutation exhibits significant variability in genotype and phenotype transmission from mother to offspring.
• Genetic counseling is challenging due to the complex inheritance patterns.
• Precision medicine approaches like PGD and MRT offer potential for preventing disease transmission.

Conclusions:

• A comprehensive understanding of the m.3243A>G mutation's genetics and phenotypes is essential for effective genetic counseling.
• Precision medicine strategies hold promise for preventing mitochondrial DNA-related diseases.
• This review provides critical insights for clinicians managing patients with the m.3243A>G mutation.