scholarly journals Patients with Epstein Barr virus-positive lymphomas have decreased CD4+T-cell responses to the viral nuclear antigen 1

2008 ◽  
Vol 123 (12) ◽  
pp. 2824-2831 ◽  
Author(s):  
Kevin N. Heller ◽  
Frida Arrey ◽  
Peter Steinherz ◽  
Carol Portlock ◽  
Amy Chadburn ◽  
...  
Keyword(s):  
T Cell ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Cd4 T Cell ◽  
Nuclear Antigen ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr

scholarly journals Epstein-Barr Virus Evades CD4+ T Cell Responses in Lytic Cycle through BZLF1-mediated Downregulation of CD74 and the Cooperation of vBcl-2

2011 ◽  
Vol 7 (12) ◽  
pp. e1002455 ◽  
Author(s):  
Jianmin Zuo ◽  
Wendy A. Thomas ◽  
Tracey A. Haigh ◽  
Leah Fitzsimmons ◽  
Heather M. Long ◽  
...  
Keyword(s):  
T Cell ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Lytic Cycle ◽  
Cd4 T Cell ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr

scholarly journals Differential Targeting and Shifts in the Immunodominance of Epstein‐Barr Virus–Specific CD8 and CD4 T Cell Responses during Acute and Persistent Infection

2005 ◽  
Vol 192 (9) ◽  
pp. 1513-1524 ◽  
Author(s):  
Tonia Woodberry ◽  
Todd J. Suscovich ◽  
Leah M. Henry ◽  
Jennifer K. Davis ◽  
Nicole Frahm ◽  
...  
Keyword(s):  
T Cell ◽  
Persistent Infection ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Cd4 T Cell ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr ◽  
And Shifts

scholarly journals CD4+ T-Cell Responses to Epstein-Barr Virus Nuclear Antigen EBNA1 in Chinese Populations Are Highly Focused on Novel C-Terminal Domain-Derived Epitopes

2006 ◽  
Vol 80 (16) ◽  
pp. 8263-8266 ◽  
Author(s):  
C. W. Tsang ◽  
X. Lin ◽  
N. H. Gudgeon ◽  
G. S. Taylor ◽  
H. Jia ◽  
...  
Keyword(s):  
T Cell ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Nuclear Antigen ◽  
Target Cells ◽  
Chinese Populations ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr ◽  
The One

ABSTRACT Epstein-Barr virus nuclear antigen EBNA1, the one viral protein uniformly expressed in nasopharyngeal carcinoma (NPC), represents a prime target for T-cell-based immunotherapy. However, little is known about the EBNA1 epitopes, particularly CD4 epitopes, presented by HLA alleles in Chinese people, the group at highest risk for NPC. We analyzed the CD4+ T-cell responses to EBNA1 in 78 healthy Chinese donors and found marked focusing on a small number of epitopes in the EBNA1 C-terminal region, including a DP5-restricted epitope that was recognized by almost half of the donors tested and elicited responses able to recognize EBNA1-expressing, DP5-positive target cells.

scholarly journals MHC II tetramers visualize human CD4+ T cell responses to Epstein–Barr virus infection and demonstrate atypical kinetics of the nuclear antigen EBNA1 response

2013 ◽  
Vol 210 (5) ◽  
pp. 933-949 ◽  
Author(s):  
Heather M. Long ◽  
Odette L. Chagoury ◽  
Alison M. Leese ◽  
Gordon B. Ryan ◽  
Eddie James ◽  
...  
Keyword(s):  
T Cell ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Cd8 T Cell ◽  
Lytic Cycle ◽  
Cd4 T Cell ◽  
Barr Virus ◽  
Mhc Ii ◽  
Cell Responses ◽  
Epstein Barr

Virus-specific CD4+ T cells are key orchestrators of host responses to viral infection yet, compared with their CD8+ T cell counterparts, remain poorly characterized at the single cell level. Here we use nine MHC II–epitope peptide tetramers to visualize human CD4+ T cell responses to Epstein–Barr virus (EBV), the causative agent of infectious mononucleosis (IM), a disease associated with large virus-specific CD8+ T cell responses. We find that, while not approaching virus-specific CD8+ T cell expansions in magnitude, activated CD4+ T cells specific for epitopes in the latent antigen EBNA2 and four lytic cycle antigens are detected at high frequencies in acute IM blood. They then fall rapidly to values typical of life-long virus carriage where most tetramer-positive cells display conventional memory markers but some, unexpectedly, revert to a naive-like phenotype. In contrast CD4+ T cell responses to EBNA1 epitopes are greatly delayed in IM patients, in line with the well-known but hitherto unexplained delay in EBNA1 IgG antibody responses. We present evidence from an in vitro system that may explain these unusual kinetics. Unlike other EBNAs and lytic cycle proteins, EBNA1 is not naturally released from EBV-infected cells as a source of antigen for CD4+ T cell priming.

scholarly journals Lytic and Latent Antigens of the Human Gammaherpesviruses Kaposi's Sarcoma-Associated Herpesvirus and Epstein-Barr Virus Induce T-Cell Responses with Similar Functional Properties and Memory Phenotypes

2007 ◽  
Vol 81 (9) ◽  
pp. 4904-4908 ◽  
Author(s):  
Florian Bihl ◽  
Murli Narayan ◽  
John V. Chisholm ◽  
Leah M. Henry ◽  
Todd J. Suscovich ◽  
...  
Keyword(s):  
T Cell ◽  
Cellular Immunity ◽  
Kaposi's Sarcoma ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Kaposi’S Sarcoma ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr ◽  
Kaposi’S Sarcoma Associated Herpesvirus

ABSTRACT The cellular immunity against Kaposi's sarcoma-associated herpesvirus (KSHV) is poorly characterized and has not been compared to T-cell responses against other human herpesviruses. Here, novel and dominant targets of KSHV-specific cellular immunity are identified and compared to T cells specific for lytic and latent antigens in a second human gammaherpesvirus, Epstein-Barr virus. The data identify a novel HLA-B57- and HLA-B58-restricted epitope in the Orf57 protein and show consistently close parallels in immune phenotypes and functional response patterns between cells targeting lytic or latent KSHV- and EBV-encoded antigens, suggesting common mechanisms in the induction of these responses.

Spontaneous T cell responses to Epstein‐Barr virus‐encoded BARF1 protein and derived peptides in patients with nasopharyngeal carcinoma: Bases for improved immunotherapy

2008 ◽  
Vol 123 (5) ◽  
pp. 1100-1107 ◽  
Author(s):  
Debora Martorelli ◽  
Karim Houali ◽  
Laura Caggiari ◽  
Emanuela Vaccher ◽  
Luigi Barzan ◽  
...  
Keyword(s):  
T Cell ◽  
Nasopharyngeal Carcinoma ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr

Dendritic Cells Expand Epstein Barr Virus Specific CD8+ T Cell Responses More Efficiently Than EBV Transformed B Cells

2005 ◽  
Vol 66 (9) ◽  
pp. 938-949 ◽  
Author(s):  
Marion Subklewe ◽  
Kathrin Sebelin ◽  
Andrea Block ◽  
Antje Meier ◽  
Anna Roukens ◽  
...  
Keyword(s):  
Dendritic Cells ◽  
T Cell ◽  
B Cells ◽  
Epstein Barr Virus ◽  
T Cell Responses ◽  
Cd8 T Cell ◽  
Barr Virus ◽  
Cell Responses ◽  
Epstein Barr
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