Adult-onset multiple mitochondrial DNA deletion syndrome due to DGUOK deficiency

Adult-onset multiple mitochondrial DNA deletion syndrome due to DGUOK deficiency is a rare genetic condition that affects the body's ability to maintain healthy mitochondrial DNA (mtDNA). Mitochondria are the tiny power plants inside every cell that produce energy. The DGUOK gene provides instructions for making an enzyme called deoxyguanosine kinase, which is essential for building and repairing mitochondrial DNA. When this gene does not work properly, multiple deletions accumulate in the mitochondrial DNA over time, leading to progressive problems mainly in muscles and the nervous system. This adult-onset form typically begins in adulthood, unlike the more severe infantile form of DGUOK deficiency that affects the liver and brain early in life. Patients usually develop progressive external ophthalmoplegia (difficulty moving the eyes), drooping eyelids (ptosis), and skeletal muscle weakness. Some individuals may also experience exercise intolerance, difficulty swallowing, hearing loss, and problems with balance or coordination. The severity and range of symptoms can vary considerably from person to person. There is currently no cure for this condition. Treatment focuses on managing symptoms and supporting quality of life. Physical therapy, occupational therapy, and assistive devices may help with mobility and daily activities. Monitoring by a team of specialists is important to address the various body systems that can be affected. Research into mitochondrial diseases is ongoing, and new therapeutic approaches are being explored.

Bring these to your next appointment

• Q1.How quickly is this condition likely to progress in my case?,Which medications should I avoid because they could harm my mitochondria?,Should I take any supplements like Coenzyme Q10 or L-carnitine, and at what doses?,How often should I have my heart and lung function checked?,Are there any clinical trials or new treatments being studied that I might be eligible for?,What kind of exercise is safe and beneficial for me?,Should my family members be tested for this genetic condition?

Common questions about Adult-onset multiple mitochondrial DNA deletion syndrome due to DGUOK deficiency