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Published on: January 21, 2019
SSPE in Slovakia: immunocytochemical study
L Cervenáková1, M Godec, E Mitrová
1Institute of Preventive and Clinical Medicine, Bratislava, Czechoslovakia.
Abstract:
In a retrospective study of two patients from Slovakia with clinical, virological and histopathological diagnosis of subacute sclerosing panencephalitis (SSPE), measles virus antigen was detected by immunocytochemical labelling studies. The formalin fixed, paraffin-embedded thin brain sections labelled with anti-measles antibodies and avidin-biotin complex peroxidase were counterstained with haematoxylin. Only a single area of brain was examined in each patient: cerebellum and parietal lobe. Viral antigen positive reaction was identified within Purkinje cells and extending along dendritic processes in cerebellum, and also in oligodendrocytes of subparietal white matter.
Insights
Measles virus antigen was detected in the brains of two patients with subacute sclerosing panencephalitis (SSPE) using immunocytochemical studies. This finding confirms measles virus involvement in SSPE pathogenesis.
Area of Science:
- Neurology
- Virology
- Pathology
Background:
- Subacute sclerosing panencephalitis (SSPE) is a rare, progressive neurological complication of measles virus infection.
- Diagnosis often relies on clinical, electroencephalographic, and cerebrospinal fluid findings, but direct viral evidence can be challenging to obtain.
Purpose of the Study:
- To investigate the presence and localization of measles virus antigen in the brain tissue of patients diagnosed with SSPE.
- To contribute to the understanding of the neuropathological mechanisms underlying SSPE.
Main Methods:
- Retrospective analysis of brain tissue from two SSPE patients from Slovakia.
- Immunocytochemical labeling using anti-measles antibodies on formalin-fixed, paraffin-embedded brain sections.
- Avidin-biotin complex peroxidase staining and counterstaining with haematoxylin.
Main Results:
- Measles virus antigen was successfully detected in examined brain areas (cerebellum and parietal lobe).
- Viral antigen was identified within Purkinje cells and their dendritic processes in the cerebellum.
- Oligodendrocytes in the subparietal white matter also showed positive viral antigen staining.
Conclusions:
- Immunocytochemistry is an effective method for detecting measles virus antigen in SSPE brain tissue.
- The findings confirm the presence of measles virus in specific neuronal and glial cell types in SSPE patients.
- This study reinforces the role of measles virus persistence and replication in the pathogenesis of subacute sclerosing panencephalitis.
