Related Experiment Video
Updated: Aug 8, 2026
Identification of Disease-related Spatial Covariance Patterns using Neuroimaging Data
Published on: June 26, 2013
Neuroimaging patterns in patients with mitochondrial leukoencephalopathies
Sonal Sharma1, James Peterson2, Cesar Augusto Alves3
1Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States of America; Mitochondrial Medicine Frontier Program, Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, United States of America; Division of Child Neurology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, United States of America.
Background And Objectives:
Leukoencephalopathies are characterized by white matter (WM) abnormalities and include various primary mitochondrial diseases (MD) that impact mitochondrial function across all neuroglial cells. Understanding these associations is vital for effective clinical management.
Methods:
We performed a retrospective analysis of patients with genetically confirmed MD who exhibited white matter abnormalities at a pediatric academic medical center. Data were obtained through medical record reviews, collecting information on demographics, genetic etiology, features of WM involvement, and other areas such as the basal ganglia, cortex, cerebellum, and spine on MRI. Biomarkers like CSF protein and plasma lactate levels were also recorded. Statistical analysis was conducted using R version 4.4.1 to assess significance of specific MRI features in relation to nuclear vs. mitochondrial DNA.
Results:
Among 192 MD patients, 142 had available neuroimaging. Of these, 43 (30 %) patients with a median age of 15.5 months exhibited WM involvement, with 53.4 % being female. The most common findings were periventricular (32 %), diffuse (42 %), and multifocal (17 %) WM lesions, with corpus callosum involvement in 51 % of cases. Distinct patterns observed included cystic changes (19 %), diffusion restriction (42 %), and white matter volume loss (40 %). Genetic analysis revealed a diverse range of mutations affecting mtDNA (30 %) and nDNA (70 %) genes.
Discussion:
Our study highlights specific neuroimaging patterns associated with leukoencephalopathies in MD. For example, periventricular involvement in MTRFR mutations and diffuse abnormalities in FBXL4 mutations reflect the variability of WM manifestations. These findings can help clinicians identify the genetic etiology in this patient cohort.
Insights
Mitochondrial diseases (MD) can cause leukoencephalopathy, affecting white matter (WM). Specific MRI patterns in pediatric patients can help identify genetic causes of these WM abnormalities.
Area of Science:
- Neuroscience
- Genetics
- Radiology
Background:
- Leukoencephalopathies involve white matter (WM) abnormalities.
- Primary mitochondrial diseases (MD) impact mitochondrial function in neuroglial cells.
- Understanding WM abnormalities in MD is crucial for clinical management.
Purpose of the Study:
- To identify specific neuroimaging patterns of white matter (WM) involvement in pediatric patients with genetically confirmed mitochondrial diseases (MD).
- To correlate these patterns with genetic etiologies for improved diagnostic accuracy.
Main Methods:
- Retrospective analysis of 192 genetically confirmed MD patients.
- Review of neuroimaging (MRI) data for 142 patients, focusing on WM and other brain structures.
- Collection of demographic, genetic, and biomarker data (CSF protein, plasma lactate).
- Statistical analysis to correlate MRI features with genetic mutations (mtDNA vs. nDNA).
Main Results:
- 30% of MD patients (43/142) exhibited white matter abnormalities.
- Common WM findings included periventricular, diffuse, and multifocal lesions, with corpus callosum involvement in 51%.
- Observed patterns included cystic changes (19%), diffusion restriction (42%), and WM volume loss (40%).
- Genetic analysis revealed mutations in nDNA (70%) more frequently than mtDNA (30%).
Conclusions:
- Specific neuroimaging patterns are associated with leukoencephalopathies in mitochondrial diseases (MD).
- Examples include periventricular involvement in MTRFR mutations and diffuse abnormalities in FBXL4 mutations.
- These findings aid clinicians in identifying genetic etiologies based on WM manifestations in MD patients.
More Related Videos
Related Concept Videos
01:37Neural Regulation
01:14Brain Imaging
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).