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Measles virus genome in infections of the central nervous system
Abstract:
The measles virus genome was traced in acute and chronic infections of the central nervous system in hamsters and humans. The extent of viral replication and gene expression was assessed by the techniques of in situ hybridization and immunofluorescence. Both replication and gene expression were restricted in chronically infected hamsters and in humans with subacute sclerosing panencephalitis. It is proposed that restriction plays an important role in persistence of measles virus and the slow evolution of disease in these and other slow infections.
Insights
Measles virus replication and gene expression are restricted in chronic central nervous system infections in hamsters and humans. This restriction is proposed to be key to measles virus persistence and slow disease progression.
Area of Science:
- Virology
- Neuroscience
- Infectious Diseases
Background:
- Measles virus can cause acute and chronic central nervous system (CNS) infections.
- Subacute sclerosing panencephalitis (SSPE) is a rare, fatal neurological complication of measles virus infection.
Purpose of the Study:
- To investigate measles virus genome replication and gene expression in acute and chronic CNS infections.
- To understand the mechanisms underlying measles virus persistence and slow disease progression in the CNS.
Main Methods:
- In situ hybridization was used to detect viral genome.
- Immunofluorescence assays were employed to assess viral gene expression.
- Studies were conducted in experimentally infected hamsters and in human SSPE cases.
Main Results:
- Measles virus replication and gene expression were found to be restricted in chronically infected hamsters.
- Similar restrictions in viral replication and gene expression were observed in human SSPE cases.
- Evidence suggests limited viral activity during chronic CNS infection.
Conclusions:
- Restricted viral replication and gene expression play a significant role in measles virus persistence in the CNS.
- These restrictions may contribute to the slow, chronic evolution of diseases like SSPE.
- Understanding these mechanisms is crucial for developing therapeutic strategies against persistent viral infections.