scholarly journals Epstein-Barr virus (EBV)-carrying and -expressing T-cell lines established from severe chronic active EBV infection

Blood ◽  
1996 ◽  
Vol 87 (4) ◽  
pp. 1446-1457 ◽  
Author(s):  
S Imai ◽  
M Sugiura ◽  
O Oikawa ◽  
S Koizumi ◽  
M Hirao ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cell Lines ◽  
Epstein Barr Virus ◽  
Gene Rearrangement ◽  
Barr Virus ◽  
Ebv Infection ◽  
Epstein Barr ◽  
T Cell Lines

Four novel Epstein-Barr virus (EBV)-carrying T-cell lines, designated SIS, AIK-T8, AIK-T4, and SKN, were established from peripheral blood lymphocytes (PBL) of patients with severe chronic active EBV infection, in the presence of interleukin-2 and 4-deoxyphorbol ester. AIK-T8 and - T4 were derived from a single patient. Cell marker and genotype analyses showed that SIS, AIK-T8, and AIK-T4 had mature T-cell phenotypes with clonally rearranged T-cell receptor (TCR) genes, whereas SKN had an immature T-cell phenotype without TCR gene rearrangement. None of the cell lines expressed B, natural killer, or myeloid antigens or had Ig gene rearrangement. All lines carried EBV genomes in a single episomal form. SIS, AIK-T8, and SKN showed the same phenotype, TCR gene configuration, and/or EBV clonotype as their source or biopsied materials; therefore, they represented EBV-infected T cells proliferating in the patients. TCR gene and EBV episomal structures similar to those of AIK-T4 were not found in its source PBL, probably due to the few parental clones in vivo. All lines expressed EBV-encoded small RNA (EBER) 1, nuclear antigen (EBNA) 1, and latent membrane protein (LMP) 1, -2A, and -2B, but not other EBNAs that could be recognized by EBV-specific immune T cells. EBV replicative antigens were rarely expressed or induced. Such EBV latency reflects the in vivo situation, in which the T cells may evade immune surveillance and be insensitive to antiherpesvirus drugs. Collectively, the data suggest that EBV can target and latently infect T cells at any stage of differentiation in vivo, thus potentially causing uncontrolled T-cell proliferation. These cell lines will facilitate further analyses of possible EBV-induced oncogenicity in T cells.

scholarly journals Standardized and Highly Efficient Expansion of Epstein-Barr Virus-Specific CD4+ T Cells by Using Virus-Like Particles

2008 ◽  
Vol 82 (8) ◽  
pp. 3903-3911 ◽  
Author(s):  
Dinesh Adhikary ◽  
Uta Behrends ◽  
Regina Feederle ◽  
Henri-Jacques Delecluse ◽  
Josef Mautner
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cell Lines ◽  
Clinical Efficacy ◽  
Epstein Barr Virus ◽  
Transplant Recipients ◽  
Virus Like Particles ◽  
Barr Virus ◽  
Epstein Barr ◽  
T Cell Lines

ABSTRACT Epstein-Barr virus (EBV)-specific T-cell lines generated by repeated stimulation with EBV-immortalized lymphoblastoid B-cell lines (LCL) have been successfully used to treat EBV-associated posttransplant lymphoproliferative disease (PTLD) in hematopoietic stem cell transplant recipients. However, PTLD in solid-organ transplant recipients and other EBV-associated malignancies respond less efficiently to this adoptive T-cell therapy. LCL-stimulated T-cell preparations are polyclonal and contain CD4+ and CD8+ T cells, but the composition varies greatly between lines. Because T-cell lines with higher CD4+ T-cell proportions show improved clinical efficacy, we assessed which factors might compromise the expansion of this T-cell population. Here we show that spontaneous virus production by LCL and, hence, the presentation of viral antigens varies intra- and interindividually and is further impaired by acyclovir treatment of LCL. Moreover, the stimulation of T cells with LCL grown in medium supplemented with fetal calf serum (FCS) caused the expansion of FCS-reactive CD4+ T cells, whereas human serum from EBV-seropositive donors diminished viral antigen presentation. To overcome these limitations, we used peripheral blood mononuclear cells pulsed with nontransforming virus-like particles as antigen-presenting cells. This strategy facilitated the specific and rapid expansion of EBV-specific CD4+ T cells and, thus, might contribute to the development of standardized protocols for the generation of T-cell lines with improved clinical efficacy.

scholarly journals MicroRNAs of Epstein-Barr Virus Attenuate T-Cell-Mediated Immune ControlIn Vivo

mBio ◽  
2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Anita Murer ◽  
Julia Rühl ◽  
Andrea Zbinden ◽  
Riccarda Capaul ◽  
Wolfgang Hammerschmidt ◽  
...  
Keyword(s):  
T Cells ◽  
Immune System ◽  
T Cell ◽  
Immune Responses ◽  
Epstein Barr Virus ◽  
Tumor Formation ◽  
Barr Virus ◽  
Ebv Infection ◽  
Epstein Barr

ABSTRACTThe human persistent and oncogenic Epstein-Barr virus (EBV) was one of the first viruses that were described to express viral microRNAs (miRNAs). These have been proposed to modulate many host and viral functions, but their predominant rolein vivohas remained unclear. We compared recombinant EBVs expressing or lacking miRNAs duringin vivoinfection of mice with reconstituted human immune system components and found that miRNA-deficient EBV replicates to lower viral titers with decreased frequencies of proliferating EBV-infected B cells. In response, activated cytotoxic EBV-specific T cells expand to lower frequencies than during infection with miRNA-expressing EBV. However, when we depleted CD8+T cells the miRNA-deficient virus reached similar viral loads as wild-type EBV, increasing by more than 200-fold in the spleens of infected animals. Furthermore, CD8+T cell depletion resulted in lymphoma formation in the majority of animals after miRNA-deficient EBV infection, while no tumors emerged when CD8+T cells were present. Thus, miRNAs mainly serve the purpose of immune evasion from T cellsin vivoand could become a therapeutic target to render EBV-associated malignancies more immunogenic.IMPORTANCEEpstein-Barr virus (EBV) infects the majority of the human population and usually persists asymptomatically within its host. Nevertheless, EBV is the causative agent for infectious mononucleosis (IM) and for lymphoproliferative disorders, including Burkitt and Hodgkin lymphomas. The immune system of the infected host is thought to prevent tumor formation in healthy virus carriers. EBV was one of the first viruses described to express miRNAs, and many host and viral targets were identified for thesein vitro. However, their role during EBV infectionin vivoremained unclear. This work is the first to describe that EBV miRNAs mainly increase viremia and virus-associated lymphomas through dampening antigen recognition by adaptive immune responses in mice with reconstituted immune responses. Currently, there is no prophylactic or therapeutic treatment to restrict IM or EBV-associated malignancies; thus, targeting EBV miRNAs could promote immune responses and limit EBV-associated pathologies.

Infusion of Cytotoxic T Cells for the Prevention and Treatment of Epstein-Barr Virus–Induced Lymphoma in Allogeneic Transplant Recipients

Blood ◽  
1998 ◽  
Vol 92 (5) ◽  
pp. 1549-1555 ◽  
Author(s):  
Cliona M. Rooney ◽  
Colton A. Smith ◽  
Catherine Y.C. Ng ◽  
Susan K. Loftin ◽  
John W. Sixbey ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Epstein Barr Virus ◽  
Mononuclear Cells ◽  
Cytotoxic T Cells ◽  
Marker Gene ◽  
Barr Virus ◽  
Immunoblastic Lymphoma ◽  
Epstein Barr ◽  
T Cell Lines

Abstract Epstein-Barr virus (EBV) causes potentially lethal immunoblastic lymphoma in up to 25% of children receiving bone marrow transplants from unrelated or HLA-mismatched donors. Because this complication appears to stem from a deficiency of EBV-specific cytotoxic T cells, we assessed the safety and efficacy of donor-derived polyclonal (CD4+ and CD8+) T-cell lines as immunoprophylaxis and treatment for EBV-related lymphoma. Thirty-nine patients considered to be at high risk for EBV-induced lymphoma each received 2 to 4 intravenous infusions of donor-derived EBV-specific T lymphocytes, after they had received T-cell–depleted bone marrow from HLA-matched unrelated donors (n = 33) or mismatched family members (n = 6). The immunologic effects of this therapy were monitored during and after the infusions. Infused cells were identified by detection of the neo marker gene. EBV-specific T cells bearing theneo marker were identified in all but 1 of the patients. Serial analysis of DNA detected the marker gene for as long as 18 weeks in unmanipulated peripheral blood mononuclear cells and for as long as 38 months in regenerated lines of EBV-specific cytotoxic T cells. Six patients (15.5%) had greatly increased amounts of EBV-DNA on study entry (>2,000 genome copies/106 mononuclear cells), indicating uncontrolled EBV replication, a complication that has had a high correlation with subsequent development of overt lymphoma. All of these patients showed 2 to 4 log decreases in viral DNA levels within 2 to 3 weeks after infusion and none developed lymphoma, confirming the antiviral activity of the donor-derived cells. There were no toxic effects that could be attributed to prophylactic T-cell therapy. Two additional patients who did not receive prophylaxis and developed overt immunoblastic lymphoma responded fully to T-cell infusion. Polyclonal donor-derived T-cell lines specific for EBV proteins can thus be used safely to prevent EBV-related immunoblastic lymphoma after allogeneic marrow transplantation and may also be effective in the treatment of established disease. © 1998 by The American Society of Hematology.

Infusion of Cytotoxic T Cells for the Prevention and Treatment of Epstein-Barr Virus–Induced Lymphoma in Allogeneic Transplant Recipients

Blood ◽  
1998 ◽  
Vol 92 (5) ◽  
pp. 1549-1555 ◽  
Author(s):  
Cliona M. Rooney ◽  
Colton A. Smith ◽  
Catherine Y.C. Ng ◽  
Susan K. Loftin ◽  
John W. Sixbey ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Epstein Barr Virus ◽  
Mononuclear Cells ◽  
Cytotoxic T Cells ◽  
Marker Gene ◽  
Barr Virus ◽  
Immunoblastic Lymphoma ◽  
Epstein Barr ◽  
T Cell Lines

Epstein-Barr virus (EBV) causes potentially lethal immunoblastic lymphoma in up to 25% of children receiving bone marrow transplants from unrelated or HLA-mismatched donors. Because this complication appears to stem from a deficiency of EBV-specific cytotoxic T cells, we assessed the safety and efficacy of donor-derived polyclonal (CD4+ and CD8+) T-cell lines as immunoprophylaxis and treatment for EBV-related lymphoma. Thirty-nine patients considered to be at high risk for EBV-induced lymphoma each received 2 to 4 intravenous infusions of donor-derived EBV-specific T lymphocytes, after they had received T-cell–depleted bone marrow from HLA-matched unrelated donors (n = 33) or mismatched family members (n = 6). The immunologic effects of this therapy were monitored during and after the infusions. Infused cells were identified by detection of the neo marker gene. EBV-specific T cells bearing theneo marker were identified in all but 1 of the patients. Serial analysis of DNA detected the marker gene for as long as 18 weeks in unmanipulated peripheral blood mononuclear cells and for as long as 38 months in regenerated lines of EBV-specific cytotoxic T cells. Six patients (15.5%) had greatly increased amounts of EBV-DNA on study entry (>2,000 genome copies/106 mononuclear cells), indicating uncontrolled EBV replication, a complication that has had a high correlation with subsequent development of overt lymphoma. All of these patients showed 2 to 4 log decreases in viral DNA levels within 2 to 3 weeks after infusion and none developed lymphoma, confirming the antiviral activity of the donor-derived cells. There were no toxic effects that could be attributed to prophylactic T-cell therapy. Two additional patients who did not receive prophylaxis and developed overt immunoblastic lymphoma responded fully to T-cell infusion. Polyclonal donor-derived T-cell lines specific for EBV proteins can thus be used safely to prevent EBV-related immunoblastic lymphoma after allogeneic marrow transplantation and may also be effective in the treatment of established disease. © 1998 by The American Society of Hematology.

Expression of Epstein-Barr virus nuclear antigen-2 (EBNA2) induces CD21/CR2 on B and T cell lines and shedding of soluble CD21

1995 ◽  
Vol 25 (6) ◽  
pp. 1713-1719 ◽  
Author(s):  
Clara Larcher ◽  
Bettina Kempkes ◽  
Elisabeth Kremmer ◽  
Wolfgang M. Prodinger ◽  
Michael Pawlita ◽  
...  
Keyword(s):  
T Cell ◽  
Cell Lines ◽  
Epstein Barr Virus ◽  
Nuclear Antigen ◽  
Barr Virus ◽  
Epstein Barr ◽  
T Cell Lines

scholarly journals Repertoire and frequency of immune cells reactive to Epstein-Barr virus–derived autologous lymphoblastoid cell lines

Blood ◽  
2008 ◽  
Vol 111 (3) ◽  
pp. 1334-1343 ◽  
Author(s):  
Sumita Bhaduri-McIntosh ◽  
Marisa J. Rotenberg ◽  
Benjamin Gardner ◽  
Marie Robert ◽  
George Miller
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cell Lines ◽  
Immune Cells ◽  
Epstein Barr Virus ◽  
Ex Vivo ◽  
Lymphoblastoid Cell Lines ◽  
Barr Virus ◽  
Different Types ◽  
Epstein Barr

AbstractAnswers to questions about frequency and repertoire of immune cells, relative contributions made by different types of immune cells toward the total Epstein-Barr virus (EBV)–directed response and the variation of such responses in healthy persons have been elusive because of disparities in assays, antigen presenting cells, and antigenic sources used in previous experiments. In this study, we addressed these questions using an assay that allowed direct comparison of responses generated by different types of cells of the immune system. This short-term (20-hour) ex vivo assay measured interferon-γ production by blood cells in response to autologous EBV-transformed lymphoblastoid cell lines (LCLs). Our experiments defined the variation in responses among persons and clearly distinguished 10 healthy EBV-immune from 10 healthy EBV-naive persons. In EBV-immune persons, 33% of responding cells were CD4+, 43.3% were CD8+, and 12.9% were γ-δ T cells. LCL-reactive CD8+ T cells were only 1.7-fold more frequent than similarly reactive CD4+T cells. Responses by γ-δ T cells were 6-fold higher in seropositive than in seronegative persons. Our findings emphasize the importance of CD4+ and γ-δ T-cell responses and have implications for immunotherapy and for identifying defects in T-cell populations that might predispose to development of EBV-associated lymphomas.

A Novel Epstein-Barr Virus-Like Virus, HVMNE, in aMacaca Nemestrina With Mycosis Fungoides

Blood ◽  
1999 ◽  
Vol 94 (6) ◽  
pp. 2090-2101
Author(s):  
E.D. Rivadeneira ◽  
M.G. Ferrari ◽  
R.F. Jarrett ◽  
A.A. Armstrong ◽  
P. Markham ◽  
...  
Keyword(s):  
T Cell ◽  
Cell Lines ◽  
Epstein Barr Virus ◽  
Cd8 T Cell ◽  
Macaca Nemestrina ◽  
Type I ◽  
Polymerase Gene ◽  
Barr Virus ◽  
Epstein Barr ◽  
T Cell Lines

Epstein-Barr virus (EBV) infection of humans has been associated with the development of lymphoid malignancies mainly of B-cell lineage, although occasionally T-cell lymphomas have been reported. We describe here the characterization of a novel EBV-like virus (HVMNE) isolated from a simian T-cell lymphotropic virus type I/II (STLV-I/II) seronegative pigtailed macaque (Macaca nemestrina) with a cutaneous T-cell lymphoma. Immunohistochemistry studies on the skin lesions demonstrated that the infiltrating cells were of the CD3+/CD8+ phenotype. Two primary transformed CD8+ T-cell lines were obtained from cultures of peripheral blood mononuclear cells (PBMC) and skin, and, with time, both cell lines became interleukin-2–independent and acquired the constitutive activation of STAT proteins. Polymerase chain reaction analysis of the DNA from the cell lines and tissues from the lymphomatous animal demonstrated the presence of a 536-bp DNA fragment that was 90% identical to EBV polymerase gene sequences, whereas the same DNA was consistently negative for STLV-I/II sequences. Electron microscopy performed on both cell lines, after sodium butyrate treatment, showed the presence of a herpes-like virus that was designated HVMNE according to the existing nomenclature. In situ hybridization studies using EBV Epstein-Barr viral-encoded RNA probes showed viral RNA expression in both CD8+ T-cell lines as well as in the infiltrating CD8+ T cells of skin-tissue biopsies. Phylogenetic analysis of a 465-bp fragment from the polymerase gene of HVMNE placed this virus within theLymphocryptovirus genus and demonstrated that HVMNEis a distinct virus, clearly related to human EBV and other EBV-like herpesviruses found in nonhuman primates.

Direct killing of Epstein-Barr virus (EBV)–infected B cells by CD4 T cells directed against the EBV lytic protein BHRF1

Blood ◽  
2004 ◽  
Vol 103 (4) ◽  
pp. 1408-1416 ◽  
Author(s):  
Elise Landais ◽  
Xavier Saulquin ◽  
Emmanuel Scotet ◽  
Lydie Trautmann ◽  
Marie-Alix Peyrat ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cell Lines ◽  
Mhc Class Ii ◽  
T Cell Responses ◽  
Cd4 T Cell ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr ◽  
T Cell Lines

Abstract Due to their low frequency, CD4 T-cell responses to Epstein-Barr virus (EBV) lytic antigens are, so far, poorly characterized. Human peptide major histocompatibility complex (MHC) class II multimers provide a means to detect and characterize such rare T cells. Along a screening of T-cell responses to lytic or latent EBV antigens within peripheral blood leukocyte (PBL)– or synovial-derived CD4 T-cell lines, we identified an human leukocyte antigen–DR*0401 (HLA-DR*0401)–restricted epitope derived from BHRF1 (BamHI fragment H rightward open reading frame 1), a viral protein produced during the early stages of the lytic cycle. We show here that T-cell responses to this particular BHRF1 epitope are shared by most EBV-infected DR*0401+ individuals, as BHRF1-specific CD4 T cells could be sorted out from all the DRB*0401 T-cell lines analyzed, using magnetic beads coated with recombinant BHRF1/DR*0401 complexes. Sorting with these peptide MHC class II multimers was very efficient, as the yield of recovery of BHRF1-specific T cells was nearly 100%. Functional analysis of a large number of clones responding to BHRF1/DR*0401 demonstrated their cytolytic action against autologous and allogeneic DR*0401+ EBV-transformed B-lymphoblastoid cell lines (B-LCLs), with 40% to 80% killing efficiency and potent interferon γ production, thus suggesting that this CD4 T-cell population contributes to the control of EBV replication. B-LCL lysis by these T-cell clones was DR*0401 dependent, EBV dependent, and was not merely due to bystander killing. Taken together, these data provide the first demonstration that a lytic antigen can induce a direct cytolytic response against EBV-infected cells.

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