Psychiatric symptoms of patients with primary mitochondrial DNA disorders

Gabriella Inczedy-Farkas, Viktoria Remenyi, Aniko Gal, Zsofia Varga, Petra Balla, Agnes Udvardy-Meszaros, Benjamin Bereznai, Maria J. Molnar

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Abstract

Background: The aim of our study was to assess psychiatric symptoms in patients with genetically proven primary mutation of the mitochondrial DNA.Methods: 19 adults with known mitochondrial mutation (MT) have been assessed with the Stanford Health Assessment Questionnaire 20-item Disability Index (HAQ-DI), the Symptom Check List-90-Revised (SCL-90-R), the Beck Depression Inventory-Short Form (BDI-SF), the Hamilton Depression Rating Scale (HDRS) and the clinical version of the Structured Clinical Interview for the the DSM-IV (SCID-I and SCID-II) As control, 10 patients with hereditary sensorimotor neuropathy (HN), harboring the peripheral myelin protein-22 (PMP22) mutation were examined with the same tools.Results: The two groups did not differ significantly in gender, age or education. Mean HAQ-DI score was 0.82 in the MT (range: 0-1.625) and 0.71 in the HN group (range: 0-1.625). Level of disability between the two groups did not differ significantly (p = 0.6076). MT patients scored significantly higher on the BDI-SF and HDRS than HN patients (12.85 versus 4.40, p = 0.031, and 15.62 vs 7.30, p = 0.043, respectively). The Global Severity Index (GSI) of SCL-90-R also showed significant difference (1.44 vs 0.46, p = 0.013) as well as the subscales except for somatization. SCID-I interview yielded a variety of mood disorders in both groups. Eight MT patient (42%) had past, 6 (31%) had current, 5 (26%) had both past and current psychiatric diagnosis, yielding a lifetime prevalence of 9/19 (47%) in the MT group. In the HN group, 3 patients had both past and current diagnosis showing a lifetime prevalence of 3/10 (30%) in this group. SCID-II detected personality disorder in 8 MT cases (42%), yielding 3 avoidant, 2 obsessive-compulsive and 3 personality disorder not otherwise specified (NOS) diagnosis. No personality disorder was identified in the HN group.Conclusions: Clinicians should be aware of the high prevalence of psychiatric symptoms in patients with mitochondrial mutation which has both etiologic and therapeutic relevance.

Original languageEnglish
Article number9
JournalBehavioral and Brain Functions
Volume8
DOIs
Publication statusPublished - Feb 13 2012

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Keywords

  • Depression
  • Mental disorders
  • Mitochondrial mutation

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Biological Psychiatry
  • Behavioral Neuroscience

Cite this

Inczedy-Farkas, G., Remenyi, V., Gal, A., Varga, Z., Balla, P., Udvardy-Meszaros, A., Bereznai, B., & Molnar, M. J. (2012). Psychiatric symptoms of patients with primary mitochondrial DNA disorders. Behavioral and Brain Functions, 8, [9]. https://doi.org/10.1186/1744-9081-8-9