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Updated: May 28, 2026
Isolation and Quantification of Epstein-Barr Virus from the P3HR1 Cell Line
Published on: September 28, 2022
Epstein-Barr virus gene expression and latent membrane protein 1 gene polymorphism in pediatric liver transplant
Beata Kasztelewicz1, Irena Jankowska, Joanna Pawłowska
1Department of Clinical Microbiology and Immunology, The Children's Memorial Health Institute, Warsaw, Poland. b.kasztelewicz@czd.pl
Insights
Epstein-Barr virus (EBV) infection in pediatric transplant patients is dynamic. Viral load correlates with LMP1 and LMP2 gene expression, not EBV gene expression patterns.
Area of Science:
- Virology
- Immunology
- Pediatric Transplantation
Background:
- Pediatric transplant recipients on immunosuppression face risks of Epstein-Barr virus (EBV)-associated complications.
- Current monitoring of EBV DNA levels in blood has limited predictive value for post-transplant outcomes.
- There is a need for additional prognostic markers to better understand EBV infection dynamics.
Purpose of the Study:
- To investigate EBV gene expression patterns and LMP1 polymorphism in relation to EBV DNA levels in pediatric liver transplant recipients.
- To identify potential prognostic markers for EBV infection in this vulnerable population.
Main Methods:
- Prospective collection of multiple blood samples from 30 pediatric liver transplant recipients.
- Measurement of EBV DNA load, analysis of LMP1 gene variants, and EBV gene expression profiling.
- Statistical analysis to correlate viral load, gene expression patterns, and LMP1 polymorphism.
Main Results:
- Distinct EBV gene expression patterns were observed, including latency 2 (71%), latency 3 (13%), latency 0 (11%), and lytic infection (5%).
- EBV gene expression patterns varied significantly over time and were not associated with EBV load.
- Viral load correlated positively with LMP1 and LMP2 gene expression and was higher with the wild-type LMP1 variant.
Conclusions:
- EBV infection in immunosuppressed pediatric transplant patients is a dynamic process with fluctuating gene expression.
- EBV viral load is associated with LMP1 and LMP2 gene activity and LMP1 polymorphism, suggesting their potential as prognostic markers.
- Monitoring EBV DNA levels alone is insufficient; incorporating gene expression and polymorphism analysis may improve patient management.
Abstract:
Immunosuppressed pediatric transplant recipients are at risk of developing Epstein-Barr virus (EBV)-associated complications (such as post-transplant lymphoproliferative disorders). Monitoring of the EBV DNA level in blood alone has a low predictive value for the post-transplant course of EBV infection and its complications. Therefore, additional prognostic markers are widely sought. The study aim was to analyze EBV gene expression patterns and LMP1 polymorphism in relation to EBV DNA levels in pediatric liver transplant recipients. EBV load measurement, LMP1 variant, and gene expression analysis were performed in collected prospectively multiple blood samples from 30 patients. Several distinct patterns of EBV gene expression were identified: latency 2 (71%), latency 3 (13%), latency 0 (11%), and lytic infection (5%). In most children's multiple blood samples, both EBV gene expression patterns and expression levels of individual EBV genes varied significantly over time. EBV gene expression patterns were not associated with the EBV load. However, the viral load correlated with the LMP1 and LMP2 expression (r = 0.34; P = 0.006, and r = 0.45; P = 0.001, respectively). Two variants of the LMP1 gene were detected, and they were consistent over time in individual patients. A wild type of LMP1 was associated with higher EBV-DNA loads (P = 0.03). This indicates that EBV infection in immunosuppressed patients is a very dynamic process, but changes in the state of EBV infection do not influence significantly the viral load. The latter, however, can be associated with the activity of LMP1 and LMP2 genes, as well as polymorphism of LMP1.
