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[Multiple sclerosis: pathogenesis and manifestations in children]
O Brissaud1, K Palin, J F Chateil
1Unité de neuropédiatrie, centre hospitalier universitaire Pellegrin, hôpital des enfants, place Amélie-Raba-Léon, Bordeaux, France. olivier.brissaud@free.fr
Insights
Multiple sclerosis (MS) is rare in children, with girls more affected than boys. While the exact cause is unknown, genetics and potential viral triggers in susceptible individuals are considered, leading to new therapeutic insights.
Area of Science:
- Neurology
- Pediatrics
- Immunology
Context:
- Multiple sclerosis (MS) is uncommon in pediatric populations, presenting distinct early symptoms compared to adults.
- Pediatric MS exhibits a higher female-to-male ratio (2.5-3:1) than adult MS.
- Initial clinical manifestations in children often include brain stem dysfunction, meningeal signs, and optic neuritis.
Purpose:
- To summarize the current understanding of pediatric multiple sclerosis, including its epidemiology, clinical presentation, and etiological hypotheses.
- To highlight the unique aspects of MS in children under ten years old.
- To underscore the need for further research into the multifactorial causes of pediatric MS.
Summary:
- Pediatric multiple sclerosis (MS) is a rare neurological disorder with a higher incidence in girls. Early signs can differ from adult MS, often involving brain stem or optic nerve inflammation.
- The etiology of MS remains multifactorial, with current research exploring a combination of genetic susceptibility and environmental factors, such as viral infections.
- Understanding the complex immune mechanisms underlying MS is crucial for developing novel therapeutic strategies.
Impact:
- Provides a concise overview of pediatric MS for clinicians and researchers.
- Highlights key differences in presentation and epidemiology between pediatric and adult MS.
- Emphasizes the ongoing search for the underlying causes of MS to inform future treatment development.
Abstract:
Multiple sclerosis (MS) is rare in children and occurs exceptionally before ten years. Sex ratio (girl/boy) is around 2.5 to 3, higher than in adults. Brain stem dysfunction and meningeal symptoms are more commonly first manifestations of the disease than in adults. Optic neuritis is also a frequent early manifestation. The etiology of the disease remains unclear and none of the advanced hypotheses (infectious, genetic, environmental) can by themselves explain its occurrence. There is a genetic susceptibility which is probably linked to many genes leading to a low related risk (less than two). A viral trigger mechanism in a person with a genetic predisposition is possible. New therapies result from a better understanding of the closed immune mechanisms of the disease.