National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

MPV17-related hepatocerebral mitochondrial DNA depletion syndrome



Other Names:
Navajo neuropathy; NN; Navajo neurohepatopathy; Navajo neuropathy; NN; Navajo neurohepatopathy; Mitochondrial DNA depletion syndrome 6; MTDPS6 See More
Categories:
This disease is grouped under:

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 255229

Definition
A rare, life-threatening, mitochondrial DNA depletion syndrome disease characterized by severe, progressive sensorimotor neuropathy associated with corneal ulceration, scarring or anesthesia, acral mutilation, metabolic and immunologic derangement, and hepatopathy (which can manifest with fulminant hepatic failure, a Reye-like syndrome or indolent progression to liver cirrhosis, depending on clinical form involved), present in the Navajo Native American population. Clinical presentation includes failure to thrive, distal limb weakness with reduced sensation, limb contractures with loss of funtion, areflexia, recurrent metabolic acidosis with intercurrent illness, immunologic anomalies manifesting with severe systemic infections, and sexual infantilism.

Visit the Orphanet disease page for more resources.
Last updated: 1/1/2019

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

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Medical Terms Other Names
Learn More:
HPO ID
Percent of people who have these symptoms is not available through HPO
Abnormality of the immune system
Immunological abnormality
0002715
Acral ulceration 0006121
Acute hepatic failure
Acute liver failure
0006554
Areflexia
Absent tendon reflexes
0001284
Ataxia 0001251
Autosomal recessive inheritance 0000007
Cirrhosis
Scar tissue replaces healthy tissue in the liver
0001394
Decreased number of peripheral myelinated nerve fibers 0003380
Diarrhea
Watery stool
0002014
Distal muscle weakness
Weakness of outermost muscles
0002460
Dystonia 0001332
Elevated hepatic transaminase
High liver enzymes
0002910
Failure to thrive
Faltering weight
Weight faltering
[ more ]
0001508
Generalized hypotonia
Decreased muscle tone
Low muscle tone
[ more ]
0001290
Global developmental delay 0001263
Hepatomegaly
Enlarged liver
0002240
Hypoglycemia
Low blood sugar
0001943
Hyporeflexia
Decreased reflex response
Decreased reflexes
[ more ]
0001265
Increased susceptibility to fractures
Abnormal susceptibility to fractures
Bone fragility
Frequent broken bones
Increased bone fragility
Increased tendency to fractures
[ more ]
0002659
Infantile onset
Onset in first year of life
Onset in infancy
[ more ]
0003593
Lactic acidosis
Increased lactate in body
0003128
Macrovesicular hepatic steatosis 0001403
Microvesicular hepatic steatosis 0001414
Nystagmus
Involuntary, rapid, rhythmic eye movements
0000639
Osteomyelitis leading to amputation due to slow healing fractures 0005010
Pain insensitivity 0007021
Painless fractures due to injury 0002661
Progressive
Worsens with time
0003676
Prolonged neonatal jaundice
Prolonged yellowing of skin in newborn
0006579
Recurrent corneal erosions
Recurrent breakdown of clear protective layer of eye
0000495
Reye syndrome-like episodes 0006582
Sensorimotor neuropathy
Nerve damage causing decreased feeling and movement
0007141
Short stature
Decreased body height
Small stature
[ more ]
0004322
Vomiting
Throwing up
0002013
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Last updated: 7/1/2020

Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.
  • Orphanet lists international laboratories offering diagnostic testing for this condition.

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Clinical Research Resources

  • Orphanet lists European clinical trials, research studies, and patient registries enrolling people with this condition. 

Patient Registry


Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease


These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • Genetics Home Reference (GHR) contains information on MPV17-related hepatocerebral mitochondrial DNA depletion syndrome. This website is maintained by the National Library of Medicine.

In-Depth Information

  • GeneReviews provides current, expert-authored, peer-reviewed, full-text articles describing the application of genetic testing to the diagnosis, management, and genetic counseling of patients with specific inherited conditions.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss MPV17-related hepatocerebral mitochondrial DNA depletion syndrome. Click on the link to view a sample search on this topic.

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