Related Experiment Video
Updated: Aug 7, 2026

Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model
Published on: June 23, 2023
Mitochondrial disease and stroke
E Martínez-Fernández1, A Gil-Peralta, R García-Lozano
1Stroke and Neuromuscular Units, Department of Neurology, Hospital Universitario Virgen del Rocío, Sevilla, Spain. med010426@nacom.es
In young patients, ischemic stroke may be the sole or initial sign of a mitochondrial disorder. Further investigation revealed specific mitochondrial DNA mutations in a subset of these patients.
Area of Science:
- Neurology
- Mitochondrial Diseases
- Genetics
Background:
- Mitochondrial disorders are known causes of ischemic cerebral infarction in young individuals.
- This study investigated whether ischemic stroke is the exclusive manifestation of mitochondrial disorders in this demographic.
Observation:
- Eighteen patients under 50 with unexplained ischemic stroke were assessed.
- Diagnostic procedures included biochemical tests, neuroimaging, echocardiography, Doppler sonography, and forearm exercise tests for lactic acid.
- Biceps muscle biopsies were analyzed for morphological, biochemical, and molecular changes.
Findings:
- 17% of patients exhibited lactic acid overproduction post-exercise.
- 33% displayed deficits in mitochondrial respiratory chain complexes.
- Confirmed mitochondrial DNA mutations (3243, 4216, 15928), including one characteristic of MELAS.
Implications:
- Ischemic stroke can be the sole presenting symptom of a mitochondrial disorder.
- Early identification of mitochondrial disorders is crucial in young stroke patients.
- Findings highlight the importance of mitochondrial investigations in cryptogenic stroke.
More Related Videos
08:48Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models
Published on: June 30, 2023
08:56Modeling Mitochondrial Disease Using Brain Organoids: A Focus on Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-like Episodes
Published on: October 10, 2025
Related Concept Videos
Mitochondrial Membranes
Electron Transport Chain: Complex I and II
ROS generation is regulated and maintained at moderate levels necessary...
Stroke: Introduction and Types
Ischemic Stroke l: Introduction
Ischemic Stroke ll: Pathophysiology
Parkinson Disease ll: Pathophysiology