Differences in EBV receptor concentration between in vitro EBV-converted lymphoma sublines reflect biological...

Area of Science:

• Virology
• Immunology
• Cell Biology

Background:

• Epstein-Barr virus (EBV) infects human B cells, establishing lifelong infections.
• Different EBV substrains exhibit distinct biological properties, influencing host cell interactions.
• Understanding EBV receptor dynamics is crucial for comprehending viral tropism and pathogenesis.

Purpose of the Study:

• To compare the Epstein-Barr virus (EBV) receptor concentration in human B-cell lymphoma lines after in vitro conversion with two distinct EBV substrains.
• To investigate the impact of EBV substrain on EBV receptor expression in converted B-cell sublines.
• To elucidate the relationship between EBV receptor concentration and the survival of B cells infected with different EBV substrains.

Main Methods:

• Generation of permanent EBV-carrying human B-cell lymphoma sublines from originally EBV-negative lines.
• In vitro conversion using the transforming B95-8 and cytopathic P3HR-1 EBV substrains.
• Quantitative measurement of EBV receptor concentration using the EBV-absorption bioassay.

Main Results:

• EBV receptor concentration was significantly reduced in sublines converted with the P3HR-1 EBV substrain compared to those converted with the B95-8 substrain.
• This reduction in EBV receptor concentration suggests a potential survival advantage for P3HR-1 infected cells.
• The findings confirm distinct biological characteristics between the B95-8 and P3HR-1 EBV substrains.

Conclusions:

• The P3HR-1 EBV substrain induces a lower EBV receptor concentration on human B-cell lymphoma lines compared to the B95-8 substrain.
• Lower EBV receptor concentration may be a factor contributing to the survival of B cells infected with the P3HR-1 substrain.
• These results underscore the biological heterogeneity of EBV substrains and their differential impact on host cell receptor expression.