scholarly journals Quantitative multi-target RNA profiling in Epstein-Barr virus infected tumor cells

2017 ◽  
Vol 241 ◽  
pp. 24-33 ◽  
Author(s):  
A.E. Greijer ◽  
O. Ramayanti ◽  
S.A.W.M. Verkuijlen ◽  
Z. Novalić ◽  
H. Juwana ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Epstein Barr Virus ◽  
Rna Profiling ◽  
Barr Virus ◽  
Epstein Barr ◽  
Target Rna ◽  
Infected Tumor

scholarly journals Epstein-Barr Virus Lytic Infection Is Required for Efficient Production of the Angiogenesis Factor Vascular Endothelial Growth Factor in Lymphoblastoid Cell Lines

2005 ◽  
Vol 79 (22) ◽  
pp. 13984-13992 ◽  
Author(s):  
Gregory K. Hong ◽  
Pawan Kumar ◽  
Ling Wang ◽  
Blossom Damania ◽  
Margaret L. Gulley ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Epstein Barr Virus ◽  
Lymphoblastoid Cell Lines ◽  
Vascular Endothelial ◽  
Early Passage ◽  
Barr Virus ◽  
Bzlf1 Gene ◽  
Epstein Barr ◽  
Endothelial Growth Factor ◽  
Infected Tumor

ABSTRACT Although Epstein-Barr virus (EBV)-associated malignancies are primarily composed of cells with one of the latent forms of EBV infection, a small subset of tumor cells containing the lytic form of infection is often observed. Whether the rare lytically infected tumor cells contribute to the growth of the latently infected tumor cells is unclear. Here we have investigated whether the lytically infected subset of early-passage lymphoblastoid cell lines (LCLs) could potentially contribute to tumor growth through the production of angiogenesis factors. We demonstrate that supernatants from early-passage LCLs infected with BZLF1-deleted virus (Z-KO LCLs) are highly impaired in promoting endothelial cell tube formation in vitro compared to wild-type (WT) LCL supernatants. Furthermore, expression of the BZLF1 gene product in trans in Z-KO LCLs restored angiogenic capacity. The supernatants of Z-KO LCLs, as well as supernatants from LCLs derived with a BRLF1-deleted virus (R-KO LCLs), contained much less vascular endothelial growth factor (VEGF) in comparison to WT LCLs. BZLF1 gene expression in Z-KO LCLs restored the VEGF level in the supernatant. However, the cellular level of VEGF mRNA was similar in Z-KO, R-KO, and WT LCLs, suggesting that lytic infection may enhance VEGF translation or secretion. Interestingly, a portion of the vasculature in LCL tumors in SCID mice was derived from the human LCLs. These results suggest that lytically infected cells may contribute to the growth of EBV-associated malignancies by enhancing angiogenesis. In addition, as VEGF is a pleiotropic factor with effects other than angiogenesis, lytically induced VEGF secretion may potentially contribute to viral pathogenesis.

scholarly journals Epstein–Barr Virus (EBV) Viral Load in Tumor Cells Did Not Predict Tumor Extensiveness in Nasopharyngeal Cancer

2021 ◽  
Vol 12 (1) ◽  
pp. 150-156
Author(s):  
Soehartati A. Gondhowiardjo ◽  
Handoko ◽  
Marlinda Adham ◽  
Lisnawati Rachmadi ◽  
Henry Kodrat ◽  
...  
Keyword(s):  
Viral Load ◽  
Tumor Cells ◽  
Epstein Barr Virus ◽  
Tumor Volume ◽  
Nasopharyngeal Cancer ◽  
Dna Quantification ◽  
Barr Virus ◽  
Nasopharyngeal Biopsy ◽  
Ebv Dna ◽  
Epstein Barr

Background: Nasopharyngeal cancer is commonly associated with Epstein–Barr virus (EBV) infection, especially undifferentiated non-keratinized histology. EBV DNA quantification through nasopharyngeal brushing was previously reported to be not related to disease stage. This study aimed to reinvestigate the relationship of EBV viral load in tumor tissue with tumor extensiveness by more accurate EBV DNA quantification through microscopically confirmed tumor cells from nasopharyngeal biopsy. Method: The specimens for EBV DNA quantification were derived from histopathology slides which were pre-treated following the QIAsymphony® SP protocol for tissue DNA extraction. Then, the extracted DNA underwent real-time polymerase chain reaction (RT-PCR) using the artus® EBV RG PCR Kit for EBV DNA quantification. The tumor volume was determined by delineating the gross tumor based on 3D imaging of the patient’s nasopharynx. Result: Twenty-four subjects were included in this study. All subjects were stage III and above, with more males (75%) than females. EBV viral load in tumor cells was found to have no correlation to tumor volume both in local and nodal regions. The median local tumor volume was 81.3 cm3 ± 80 cm3. The median EBV viral load in tumor cells was 95,644.8 ± 224,758.4 copies/100 ng of DNA. The median nodal or regional tumor volume was 35.7 ± 73.63 cm3. Conclusion: EBV viral load from tumor cells from nasopharyngeal biopsy has no relationship with tumor extensiveness in nasopharyngeal cancer. The presence and amount of EBV in tumor cells did not translate into larger or smaller tumors. The EBV viral proteins and RNAs were perhaps more likely to confer some prognostic information due to the fact that those molecules were related to carcinogenesis.

scholarly journals Epstein-Barr Virus (EBV)-Specific Cytotoxic T Lymphocytes for the Treatment of Patients With EBV-Positive Relapsed Hodgkin's Disease

Blood ◽  
1998 ◽  
Vol 91 (8) ◽  
pp. 2925-2934 ◽  
Author(s):  
Marie A. Roskrow ◽  
Nobuhiro Suzuki ◽  
Yan-jun Gan ◽  
John W. Sixbey ◽  
Catherine Y.C. Ng ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Cytotoxic T Lymphocytes ◽  
Hodgkin's Disease ◽  
Epstein Barr Virus ◽  
Hodgkin’S Disease ◽  
Barr Virus ◽  
Specific Ctls ◽  
Epstein Barr ◽  
Relapsed Disease

Adoptive transfer of Epstein-Barr virus (EBV)-specific cytotoxic T lymphocytes (CTLs) is effective prophylaxis and treatment of EBV-positive immunoblastic lymphoma in immunocompromised patients. In 50% of patients with Hodgkin's disease, the tumor cells are EBV antigen-positive and may therefore also be suitable targets for treatment with virus-specific CTLs. However, Hodgkin's disease may produce several inhibitory effects on immune induction and effector function in vivo, which may preclude the generation or effector function of CTLs reactive against EBV viral proteins, including those expressed by the tumor cells. We have investigated whether EBV-specific CTLs could be generated ex vivo from 13 patients with Hodgkin's disease: nine with active relapsed disease and four who were in clinical remission after a first or subsequent relapse. CTL lines were successfully generated from nine of 13 patients (five active disease, four remission). Although these lines had an abnormal pattern of expansion comparable to EBV-specific CTLs generated from normal donors, their phenotype was normal except for reduced expression of the zeta chain of the T-cell receptor (TCR). Their cytotoxicity was also compared to EBV-specific lines generated from normal donors and included activity against LMP2a, one of the three weakly immunogenic viral antigens expressed by Hodgkin's tumor cells. To assess the activity of the CTLs in vivo, they were gene-marked and infused into three patients with multiply relapsed disease. The CTLs persisted for more than 13 weeks postinfusion and retained their potent antiviral effects in vivo, thereby enhancing the patient immune response to EBV. This approach may therefore have value in the treatment of EBV-positive Hodgkin's disease.

Effect of Epstein-Barr Virus Infection on Response to Chemotherapy and Survival in Hodgkin’s Disease

Blood ◽  
1999 ◽  
Vol 94 (2) ◽  
pp. 442-447 ◽  
Author(s):  
Paul G. Murray ◽  
Lucinda J. Billingham ◽  
Hassan T. Hassan ◽  
Joanne R. Flavell ◽  
Paul N. Nelson ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Hodgkin's Disease ◽  
Epstein Barr Virus ◽  
Remission Rate ◽  
Hodgkin’S Disease ◽  
Clinical Stage ◽  
Epstein Barr Virus Infection ◽  
Barr Virus ◽  
Response To Chemotherapy ◽  
Epstein Barr

Abstract We have analyzed paraffin sections from 190 patients with histologically confirmed Hodgkin’s disease (HD) for the presence of Epstein-Barr virus (EBV) using in situ hybridization to detect the EBV-encoded Epstein-Barr virus early RNAs (EBERs) and immunohistochemistry to identify latent membrane protein-1 (LMP1) expression. EBV was present in the tumor cells in 51 HD cases (27%) and was mainly confined to the mixed cellularity and nodular sclerosis subtypes. There was no difference between EBV-positive and EBV-negative HD patients with regard to age, clinical stage, presentation, and the number of alternating chemotherapy cycles of ChIVPP and PABIOE received. The complete remission rate after study chemotherapy was 80% in EBV-positive patients versus 69% in EBV-negative patients (P = .05). The 2-year failure-free survival rate was significantly better for EBV-positive patients when compared with the EBV-negative HD group (P = .02). Although 2-year and 5-year overall survival rates were better for EBV-positive HD patients, the differences were not statistically significant (P = .18 andP = .40, respectively). In conclusion, the results confirm the favorable prognostic value of EBV in the tumor cells of HD patients and suggest important differences in response to chemotherapy between EBV-positive and EBV-negative patients.

Latent Epstein-Barr Virus Infection of Tumor Cells in Classical Hodgkin's Lymphoma Predicts Adverse Outcome in Older Adult Patients

2009 ◽  
Vol 27 (23) ◽  
pp. 3815-3821 ◽  
Author(s):  
Arjan Diepstra ◽  
Gustaaf W. van Imhoff ◽  
Michael Schaapveld ◽  
Henrike Karim-Kos ◽  
Anke van den Berg ◽  
...  
Keyword(s):  
Tumor Cell ◽  
Tumor Cells ◽  
Older Adult ◽  
Hodgkin’S Lymphoma ◽  
Epstein Barr Virus ◽  
Adult Patients ◽  
Hodgkin's Lymphoma ◽  
Barr Virus ◽  
Epstein Barr ◽  
The Impact

Purpose In classical Hodgkin's lymphoma (cHL), the impact of tumor cell Epstein-Barr virus (EBV) status on clinical outcome is controversial. Patients and Methods We assessed failure-free survival (FFS) and relative survival (RS) in 412 patients with cHL and age-defined subgroups in a population-based study in the northern Netherlands. Tumor cell EBV status was positive in 34%, and the median follow-up time was 7.1 years. Patients' median age at diagnosis was 35 years (range, 7 to 91 years), and 63% had Ann Arbor stage I or II, 24% had stage III, and 12% had stage IV disease. Results EBV status influenced 5-year FFS and RS only in patients from the age group 50 to 74 years. Five-year FFS was 60% in patients with EBV-positive versus 85% in EBV-negative tumors (P = .01). Five-year RS was 69% in patients with EBV-positive versus 82% in EBV-negative tumors (P = .03). After adjusting for histology, HLA class II expression by tumor cells, stage, presence of extranodal localizations and treatment, and the effect of positive EBV tumor status remained significant in FFS multivariate analysis (hazard ratio, 3.11; 95% CI, 1.28 to 7.53; P = .01). Conclusion This study indicates that treatment failure in older adult patients with cHL is associated with positive tumor cell EBV status.

Effect of Epstein-Barr Virus Infection on Response to Chemotherapy and Survival in Hodgkin’s Disease

Blood ◽  
1999 ◽  
Vol 94 (2) ◽  
pp. 442-447
Author(s):  
Paul G. Murray ◽  
Lucinda J. Billingham ◽  
Hassan T. Hassan ◽  
Joanne R. Flavell ◽  
Paul N. Nelson ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Hodgkin's Disease ◽  
Epstein Barr Virus ◽  
Remission Rate ◽  
Hodgkin’S Disease ◽  
Clinical Stage ◽  
Epstein Barr Virus Infection ◽  
Barr Virus ◽  
Response To Chemotherapy ◽  
Epstein Barr

We have analyzed paraffin sections from 190 patients with histologically confirmed Hodgkin’s disease (HD) for the presence of Epstein-Barr virus (EBV) using in situ hybridization to detect the EBV-encoded Epstein-Barr virus early RNAs (EBERs) and immunohistochemistry to identify latent membrane protein-1 (LMP1) expression. EBV was present in the tumor cells in 51 HD cases (27%) and was mainly confined to the mixed cellularity and nodular sclerosis subtypes. There was no difference between EBV-positive and EBV-negative HD patients with regard to age, clinical stage, presentation, and the number of alternating chemotherapy cycles of ChIVPP and PABIOE received. The complete remission rate after study chemotherapy was 80% in EBV-positive patients versus 69% in EBV-negative patients (P = .05). The 2-year failure-free survival rate was significantly better for EBV-positive patients when compared with the EBV-negative HD group (P = .02). Although 2-year and 5-year overall survival rates were better for EBV-positive HD patients, the differences were not statistically significant (P = .18 andP = .40, respectively). In conclusion, the results confirm the favorable prognostic value of EBV in the tumor cells of HD patients and suggest important differences in response to chemotherapy between EBV-positive and EBV-negative patients.

scholarly journals Malignant Transformation of Epstein-Barr Virus-Negative Akata Cells by Introduction of the BARF1 Gene Carried by Epstein-Barr Virus

2003 ◽  
Vol 77 (6) ◽  
pp. 3859-3865 ◽  
Author(s):  
Wang Sheng ◽  
Gisèle Decaussin ◽  
Audrey Ligout ◽  
Kenzo Takada ◽  
Tadamasa Ooka
Keyword(s):  
Cell Line ◽  
Tumor Cells ◽  
Malignant Transformation ◽  
Epstein Barr Virus ◽  
Dna Binding Protein ◽  
Tumor Formation ◽  
Scid Mice ◽  
Barr Virus ◽  
Epstein Barr ◽  
Human B Cell

ABSTRACT Spontaneous loss of the Epstein-Barr virus (EBV) genome in the BL cell line Akata led to loss of tumorigenicity in SCID mice, suggesting an important oncogenic activity of EBV in B cells. We previously showed that introduction of the BARF1 gene into the human B-cell line Louckes induced a malignant transformation in newborn rats (M. X. Wei, J. C. Moulin, G. Decaussin, F. Berger, and T. Ooka, Cancer Res. 54:1843-1848, 1994). Since 1 to 2% of Akata cells expressed lytic antigens and expressed the BARF1 gene, we investigated whether introduction of the BARF1 gene into EBV-negative Akata cells can induce malignant transformation. Here we show that BARF1-transfected, EBV-negative Akata cells activated Bcl2 expression and induced tumor formation when they were injected into SCID mice. In addition, when EBV-positive Akata cells expressing a low level of BARF1 protein were injected into SCID mice, the expression of BARF1, as well as several lytic proteins, such as EA-D, ZEBRA, and a 135-kDa DNA binding protein, increased in tumor cells while no latent LMP1 and late gp220-320 expression was observed in tumor cells. These observations suggest that the BARF1 gene may be involved in the conferral of tumorigenicity by EBV.

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