Epstein-Barr virus and Hodgkin's disease

Area of Science:

• Oncology
• Virology
• Immunology

Background:

• Hodgkin's disease shows a strong association with Epstein-Barr virus (EBV).
• EBV genomes and gene products, like latent membrane protein (LMP), are found in neoplastic cells in about 50% of cases.
• EBV infection is not limited to cancer cells.

Purpose of the Study:

• To characterize the phenotype and distribution of EBV-infected cells in Hodgkin's disease.
• To investigate the role of EBV in the etiology of Hodgkin's disease.

Main Methods:

• In situ hybridization using probes for EBV-encoded small nuclear RNAs (EBER1 and EBER2).
• Analysis of neoplastic and non-neoplastic cells in lymph nodes from Hodgkin's disease patients and controls.

Main Results:

• Latent EBV infection was detected in non-malignant, polyclonal B-cells (LMP-negative) in lymph nodes of patients and controls.
• Neoplastic cells in Hodgkin's disease harbored monoclonal EBV genomes expressing LMP.
• The presence of monoclonal EBV in neoplastic cells suggests specific immunological deficiencies in patients.

Conclusions:

• EBV contributes to the etiology of a significant proportion of Hodgkin's disease cases.
• Hodgkin's disease may arise from specific immunological deficiencies that allow monoclonal EBV-infected B-cells to proliferate.