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Differential gene expression in HIV/SIV-associated and spontaneous lymphomas
V V Nenasheva1, A I Nikolaev, A V Martynenko
1Institute of Molecular Genetics, Russian Academy of Sciences, Kurchatov sq. 2, Moscow, Russia.
International Journal of Medical Sciences
|October 22, 2005
Summary
This study identified two genes, a-myb and pub, specifically overexpressed in AIDS-associated lymphomas. This finding may explain virus-specific lymphomagenesis in Diffuse large B-cell lymphoma (DLBCL).
Area of Science:
- Oncology
- Virology
- Molecular Biology
Background:
- Diffuse large B-cell lymphoma (DLBCL) presents higher prevalence and mortality in HIV/SIV-infected individuals compared to immunocompetent individuals.
- Viral lymphomagenesis in HIV/SIV-associated DLBCL shares similarities with non-HIV/SIV-associated DLBCL, suggesting common underlying mechanisms.
Purpose of the Study:
- To identify genes specifically overexpressed in HIV/SIV-associated DLBCL compared to non-HIV/SIV-associated DLBCL.
- To investigate the role of these differentially expressed genes in virus-specific lymphomagenesis.
Main Methods:
- Comparative gene expression profiling using subtractive hybridization.
- Northern blot analysis to validate gene expression levels.
Main Results:
- Two genes, a-myb and pub, were found to be exclusively upregulated in HIV/SIV-associated DLBCLs.
- Downregulation of the pub gene was observed in all non-HIV-associated lymphomas.
- Other genes, including set, ND4, and SMG-1, were upregulated in both HIV/SIV-associated and non-HIV/SIV-associated DLBCLs.
Conclusions:
- Simultaneous transcriptional upregulation of a-myb and pub is specific to AIDS-associated lymphomas.
- These genes may play a crucial role in the virus-specific lymphomagenesis of DLBCL in HIV/SIV-infected hosts.