Related Experiment Video
Updated: May 6, 2026
09:43
An Efficient and Simple Method to Establish NK and T Cell Lines from Patients with Chronic Active Epstein-Barr Virus Infection
Published on: March 30, 2018
9.1K
Epstein Barr Virus (EBV) Latent Membrane Protein 1 (LMP-1) Regulates Functional Markers in Intermediate and
Agustina Moyano1, Ana Colado2, María Eugenia Amarillo1
1Multidisciplinary Institute for Investigation in Pediatric Pathologies (IMIPP), CONICET-GCBA, Pathology Division, Ricardo Gutiérrez Children's Hospital, Buenos Aires C1425EFD, Argentina.
Cancers
|January 8, 2025
Summary
Epstein-Barr virus (EBV) infection involves intermediate (I) and non-classical (NC) monocytes. The EBV oncoprotein LMP-1 influences regulatory protein expression in these monocytes, impacting immune response.
Area of Science:
- Immunology
- Virology
- Cell Biology
Background:
- Epstein-Barr virus (EBV) infects over 90% of humans, with innate immunity crucial in pediatric primary infection.
- Monocytes, including classical, intermediate (I), and non-classical (NC) subpopulations, play diverse roles in immune modulation.
- The specific involvement of monocyte subpopulations in EBV infection remains largely unexplored.
Purpose of the Study:
- To investigate the role of distinct monocyte subpopulations in Epstein-Barr virus (EBV) primary infection, healthy carriers, and reactivation.
- To explore the correlation between EBV infection status and the expression of specific cell surface markers on monocytes.
- To determine the influence of the EBV oncoprotein LMP-1 on monocyte subpopulations.
Main Methods:
- Analysis of peripheral blood and tonsil biopsies from EBV primary infected (PI), healthy carriers (HC), and reactivation (R) patients.
- Differentiation and characterization of monocyte subpopulations (classical, intermediate, non-classical) based on membrane protein expression.
- Correlation analysis of immune cell markers (CD163, PD-L1) and the EBV latent protein LMP-1.
Main Results:
- Classical monocytes were predominant across all EBV infection statuses.
- Significant positive correlations were observed between tonsillar CD163 and CD163 expression in non-classical (NC) monocytes in healthy carriers.
- PD-L1 expression in tonsillar cells positively correlated with PD-L1 on NC monocytes, and LMP-1 showed a positive correlation with PD-L1, CD163, and CD206 in the NC subpopulation.
Conclusions:
- Intermediate (I) and non-classical (NC) monocytes exhibit a predominant response during Epstein-Barr virus (EBV) infection.
- The EBV oncoprotein LMP-1 may regulate the expression of key proteins, including PD-L1 and CD163, on I and NC monocytes.
- These findings highlight the critical role of specific monocyte subsets in the immune response to EBV.
Related Concept Videos
03:18Non-LTR Retrotransposons
12.5K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
12.5K
01:38Intralumenal Vesicles and Multivesicular Bodies
4.0K
Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
4.0K
01:18Lymphoid Cells and Tissues
3.4K
Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
3.4K