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Published on: November 8, 2011
Expression of latent and replicative-infection genes of Epstein-Barr virus in macrophage
M Shimakage1, M Kimura, S Yanoma
1Clinical Research Institute, Osaka National Hospital, Japan.
Abstract:
Unlike other herpesviruses, Epstein-Barr virus (EBV) has not yet been shown to infect macrophages. Six macrophage cultures were isolated from normal and affected samples. Nested polymerase chain reaction revealed the existence of the EBV genome in all these macrophages. EBV latent genes expression in all cultures were detected by mRNA in situ hybridization and immunofluorescence staining. Some cultures also expressed EBV replicative-infection proteins, while in other cultures induction of these proteins was demonstrated. These findings are the first to show expression of several latent and replicative-infection genes of EBV in macrophages, indicating that EBV proliferates in macrophages.
Insights
Epstein-Barr virus (EBV) infects macrophages, a novel finding. Researchers detected the EBV genome and gene expression in macrophage cultures, indicating viral proliferation in these cells.
Area of Science:
- Virology
- Immunology
- Cell Biology
Background:
- Epstein-Barr virus (EBV), a human herpesvirus, is known to infect various cell types.
- Previous research had not established EBV's ability to infect macrophages.
Purpose of the Study:
- To investigate the potential infection of macrophages by Epstein-Barr virus (EBV).
- To determine if EBV can express latent and replicative genes within macrophages.
Main Methods:
- Isolation of six macrophage cultures from normal and affected samples.
- Nested polymerase chain reaction (PCR) to detect the EBV genome.
- mRNA in situ hybridization and immunofluorescence staining to detect EBV gene expression.
Main Results:
- The EBV genome was detected in all tested macrophage cultures.
- Expression of EBV latent genes was confirmed in all cultures.
- Both constitutive expression and induction of EBV replicative-infection proteins were observed in different cultures.
Conclusions:
- This study provides the first evidence of EBV gene expression in macrophages.
- Findings indicate that EBV can proliferate within macrophages.
- Macrophage infection by EBV opens new avenues for understanding viral pathogenesis.
