Objective:The purpose was to test the hypothesis that Dupuytren disease (DD) is associated with a previously reported mutation in mitochondrial DNA at position 2839.
Methods:Two hundred sixty-nine cases of DD and an equal number of matched controls were identified in Marshfield Clinic's Personalized Medicine Research Project (PMRP). Clinical data used to describe the cohort were abstracted from the electronic medical records of the population. Genetic analysis of all the cases and controls was done using a custom synthesis TaqMan assay, while genetic analysis of sixteen of the above cases with a familial history of DD was performed by mitochondrial DNA sequencing at position C2839A.Results: Cases and controls were evenly distributed with 167 (62%) men and 102 (38%) women. The majority, 264 (98%) of the cases and controls were white non-Hispanic. Of the 269 cases, 16 were found to have a familial history of DD. Two cases had a maternal history, eight a paternal history, five an affected sibling, and one a paternal grandfather. All cases and controls were found to have only the C allele at the site of the reported mitochondrial C2839A polymorphism.
Conclusions:The previously reported mitochondrial mutation was not present in our small, maternally inherited cohort or in the total population of 538 cases and controls. This finding does not support the reported incidence of this polymorphism in 90% of the affected population with a maternal inheritance, and calls into question the role of the C2839A mitochondrial DNA polymorphism in familial or sporadic cases of DD. Dupuyt ren disease (DD) is a progressive and irreversible fibrosis of the palmar fascia of the hand. The fibrotic process begins with palmar nodules followed by rope-like cord formation that over time produces progressive contraction of the digits at the metacarpalphalangeal and proximal interphalangeal joints. The ring finger is most frequently affected, followed by the small, thumb, long, and index fingers. The symptoms are usually unilateral but may progress to bilateral disease. 1,2 In some patients, the subsequent flexion deformities of the hand severely limit the ability to perform normal activities and negatively impact quality of life.In Caucasians, DD is considered one of the most common hereditary connective tissue disorders, predominantly affecting individuals of Northern European descent. Approximately 40% of DD patients have an affected relative based on several familial aggregation studies.2 Prevalence of DD in the United States ranges from 0.5% to 11%, with the annual number of new cases of physician-diagnosed DD in the year 2007 estimated at 3 per 10,000.1 Most patients diagnosed with DD are over age 60, and men are affected 3 to 5 times more often than women.