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Evidence that brain capillary endothelial cells can be infected with murine leukaemia retrovirus, LP-BM5
Abstract:
Some mice infected with murine leukaemia retrovirus, LP-BM5 including ecotropic, mink cell focus-inducing murine leukaemia virus, and a replication-defective genome, have been reported to show weakness, ataxia, or selective deficits in spatial learning after developing an immunodeficiency syndrome similar to human AIDS. In the central nervous system, astrocytes and microglial cells have been shown to be infected by this virus. We present here findings that the ecotropic virus and defective genome can infect murine brain capillary endothelial cells, and infected endothelial cells show an impaired function as target cells against myelin basic protein (MBP) specific T cell clone.
Insights
Murine retrovirus infection impairs brain capillary endothelial cells, affecting central nervous system function and potentially contributing to neurological deficits in mice.
Area of Science:
- Neurovirology
- Immunology
- Retroviral Research
Background:
- Murine retrovirus LP-BM5 infection causes immunodeficiency in mice, resembling human AIDS.
- Central nervous system (CNS) involvement includes astrocyte and microglial cell infection.
- Neurological symptoms like ataxia and spatial learning deficits are observed.
Purpose of the Study:
- To investigate the susceptibility of murine brain capillary endothelial cells to LP-BM5 retrovirus infection.
- To determine the functional consequences of this infection on endothelial cells.
- To explore the role of infected endothelial cells in CNS pathology.
Main Methods:
- Infection of primary murine brain capillary endothelial cells with ecotropic retrovirus and defective genome.
- Assessment of endothelial cell infection and viability.
- Functional assays using myelin basic protein (MBP)-specific T cell clones.
Main Results:
- Murine brain capillary endothelial cells are susceptible to infection by the ecotropic virus and defective genome.
- Infected endothelial cells exhibit impaired function as target cells for MBP-specific T cells.
- This suggests a novel mechanism for CNS dysfunction during retroviral infection.
Conclusions:
- Brain capillary endothelial cells are a target for LP-BM5 retrovirus, contributing to CNS pathology.
- Impaired endothelial cell function may exacerbate neuroinflammation and neurological deficits.
- Findings highlight the importance of the neurovasculature in retroviral-induced neurological disease.