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Abstract
Although Epstein-Barr virus (EBV) is an orally transmitted virus, viral transmission through the oropharyngeal mucosal epithelium is not well understood. In this study, we investigated how EBV traverses polarized human oral epithelial cells without causing productive infection. We found that EBV may be transcytosed through oral epithelial cells bidirectionally, from both the apical to the basolateral membranes and the basolateral to the apical membranes. Apical to basolateral EBV transcytosis was substantially reduced by amiloride, an inhibitor of macropinocytosis. Electron microscopy showed that virions were surrounded by apical surface protrusions and that virus was present in subapical vesicles. Inactivation of signaling molecules critical for macropinocytosis, including phosphatidylinositol 3-kinases, myosin light-chain kinase, Ras-related C3 botulinum toxin substrate 1, p21-activated kinase 1, ADP-ribosylation factor 6, and cell division control protein 42 homolog, led to significant reduction in EBV apical to basolateral transcytosis. In contrast, basolateral to apical EBV transcytosis was substantially reduced by nystatin, an inhibitor of caveolin-mediated virus entry. Caveolae were detected in the basolateral membranes of polarized human oral epithelial cells, and virions were detected in caveosome-like endosomes. Methyl β-cyclodextrin, an inhibitor of caveola formation, reduced EBV basolateral entry. EBV virions transcytosed in either direction were able to infect B lymphocytes. Together, these data show that EBV transmigrates across oral epithelial cells by (i) apical to basolateral transcytosis, potentially contributing to initial EBV penetration that leads to systemic infection, and (ii) basolateral to apical transcytosis, which may enable EBV secretion into saliva in EBV-infected individuals.
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Huang SH, Kozak PJ, Kim J, Habineza-Ndikuyeze G, Meade C, Gaurnier-Hausser A, Patel R, Robertson E, Mason NJ. Evidence of an oncogenic gammaherpesvirus in domestic dogs. Virology 2012; 427:107-17. [PMID: 22405628 DOI: 10.1016/j.virol.2012.02.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 01/13/2012] [Accepted: 02/08/2012] [Indexed: 12/12/2022]
Abstract
In humans, chronic infection with the gammaherpesvirus Epstein-Barr virus is usually asymptomatic; however some infected individuals develop hematological and epithelial malignancies. The exact role of EBV in lymphomagenesis is poorly understood partly because of the lack of clinically relevant animal models. Here we report the detection of serological responses against EBV capsid antigens in healthy dogs and dogs with spontaneous lymphoma and that dogs with the highest antibody titers have B cell lymphoma. Moreover, we demonstrate the presence of EBV-like viral DNA and RNA sequences and Latent Membrane Protein-1 in malignant lymph nodes of dogs with lymphoma. Finally, electron microscopy of canine malignant B cells revealed the presence of classic herpesvirus particles. These findings suggest that dogs can be naturally infected with an EBV-like gammaherpesvirus that may contribute to lymphomagenesis and that dogs might represent a spontaneous model to investigate environmental and genetic factors that influence gammaherpesvirus-associated lymphomagenesis in humans.
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Affiliation(s)
- Shih-Hung Huang
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104-6010, USA.
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Mori K, Haruyama T, Nagata K. Tamiflu-resistant but HA-mediated cell-to-cell transmission through apical membranes of cell-associated influenza viruses. PLoS One 2011; 6:e28178. [PMID: 22140536 PMCID: PMC3227662 DOI: 10.1371/journal.pone.0028178] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 11/02/2011] [Indexed: 01/01/2023] Open
Abstract
The infection of viruses to a neighboring cell is considered to be beneficial in terms of evasion from host anti-virus defense systems. There are two pathways for viral infection to “right next door”: one is the virus transmission through cell-cell fusion by forming syncytium without production of progeny virions, and the other is mediated by virions without virus diffusion, generally designated cell-to-cell transmission. Influenza viruses are believed to be transmitted as cell-free virus from infected cells to uninfected cells. Here, we demonstrated that influenza virus can utilize cell-to-cell transmission pathway through apical membranes, by handover of virions on the surface of an infected cell to adjacent host cells. Live cell imaging techniques showed that a recombinant influenza virus, in which the neuraminidase gene was replaced with the green fluorescence protein gene, spreads from an infected cell to adjacent cells forming infected cell clusters. This type of virus spreading requires HA activation by protease treatment. The cell-to-cell transmission was also blocked by amantadine, which inhibits the acidification of endosomes required for uncoating of influenza virus particles in endosomes, indicating that functional hemagglutinin and endosome acidification by M2 ion channel were essential for the cell-to-cell influenza virus transmission. Furthermore, in the cell-to-cell transmission of influenza virus, progeny virions could remain associated with the surface of infected cell even after budding, for the progeny virions to be passed on to adjacent uninfected cells. The evidence that cell-to-cell transmission occurs in influenza virus lead to the caution that local infection proceeds even when treated with neuraminidase inhibitors.
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Affiliation(s)
- Kotaro Mori
- Department of Infection Biology, Faculty of Medicine and Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
| | - Takahiro Haruyama
- Department of Infection Biology, Faculty of Medicine and Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
| | - Kyosuke Nagata
- Department of Infection Biology, Faculty of Medicine and Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan
- * E-mail:
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Possible DNA viral factors of human breast cancer. Cancers (Basel) 2010; 2:498-512. [PMID: 24281079 PMCID: PMC3835088 DOI: 10.3390/cancers2020498] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 04/03/2010] [Accepted: 04/12/2010] [Indexed: 02/07/2023] Open
Abstract
Viruses are considered to be one of the high-risk factors closely related to human breast cancer. However, different studies of viruses in breast cancer present conflicting results and some of these works remain in dispute. DNA viruses, such as specific types of human papillomaviruses (HPV), Epstein–Barr virus (EBV), human cytomegalovirus (HCMV), herpes simplex virus (HSV), and human herpes virus type 8 (HHV-8), have emerged as causal factors of some human cancers. These respective exogenous viruses and the possibility of multiple viral factors are discussed in this review.
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Jo DS, Han JH, Kim SY, Kim MS, Yi HK, Lee DY, Hwang PH. Changes in the expression of cytokines and apoptosis-related genes in children with infectious mononucleosis. KOREAN JOURNAL OF PEDIATRICS 2009. [DOI: 10.3345/kjp.2009.52.12.1348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Dae Sun Jo
- Department of Pediatrics, Medical School, Chonbuk National University, Jeononju, Korea
| | - Ji Hye Han
- Department of Pediatrics, Medical School, Chonbuk National University, Jeononju, Korea
| | - Sun Young Kim
- Research Institute of Clinical Medicine, Chonbuk National University, Jeononju, Korea
| | - Min Sun Kim
- Department of Pediatrics, Medical School, Chonbuk National University, Jeononju, Korea
| | - Ho Keun Yi
- Department of Biochemistry, School of Dentistry, Chonbuk National University, Jeononju, Korea
| | - Dae-Yeol Lee
- Department of Pediatrics, Medical School, Chonbuk National University, Jeononju, Korea
| | - Pyoung Han Hwang
- Research Institute of Clinical Medicine, Chonbuk National University, Jeononju, Korea
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Ehlin-Henriksson B, Mowafi F, Klein G, Nilsson A. Epstein-Barr virus infection negatively impacts the CXCR4-dependent migration of tonsillar B cells. Immunology 2006; 117:379-85. [PMID: 16476057 PMCID: PMC1782227 DOI: 10.1111/j.1365-2567.2005.02311.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The primary Epstein-Barr virus (EBV) infection occurs in the oropharynx, where the virus infects B cells and subsequently establishes latency in the memory B-cell compartment. EBV has previously been shown to induce changes in the cell surface expression of several chemokine receptors in cell lines and the transfection of EBNA2 or LMP1 into a B-cell-lymphoma-derived cell line decreased the expression of CXCR4. We show that in vitro EBV infection reduces the expression of CXCR4 on primary tonsil B cells already 43 hr after infection. Furthermore, EBV infection affects the chemotactic response to stromal cell-derived factor (SDF-1)alpha/CXCL12, the ligand for CXCR4, with a reduction of SDF-1alpha-induced migration. To clarify whether this reduced migration is EBV-specific or a consequence of cell activation, tonsillar B cells were either infected with EBV, activated with anti-CD40 and interleukin-4 (IL-4) or kept in medium. Activation by anti-CD40 and IL-4 decreased the CXCR4 expression but the CD40 + IL-4-stimulated cells showed no reduction of chemotactic efficacy. Our finding suggests that changing the SDF-1alpha response of the EBV-infected B cells may serve the viral strategy by directing the infected cells into the extrafollicular areas, rather than retaining them in the lymphoepithelium.
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Affiliation(s)
| | - Frida Mowafi
- Microbiology and Tumour Biology Centre, Karolinska InstituteStockholm, Sweden
| | - George Klein
- Microbiology and Tumour Biology Centre, Karolinska InstituteStockholm, Sweden
| | - Anna Nilsson
- Microbiology and Tumour Biology Centre, Karolinska InstituteStockholm, Sweden
- Paediatric Cancer Research Unit, Astrid Lindgrens Children HospitalStockholm, Sweden
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Chiou SH, Chow KC, Yang CH, Chiang SF, Lin CH. Discovery of Epstein–Barr virus (EBV)-encoded RNA signal and EBV nuclear antigen leader protein DNA sequence in pet dogs. J Gen Virol 2005; 86:899-905. [PMID: 15784884 DOI: 10.1099/vir.0.80792-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to investigate Epstein–Barr virus (EBV)-related virus infection in pet dogs. The presence of antibodies to EBV antigens and EBV-related DNA was determined by Western blot analysis and PCR, respectively. Among 36 pet dogs examined for serum antibodies, 32 (88·9 %) were positive for EBV-specific thymidine kinase, 15 (41·7 %) for EBV-encoded DNA-binding protein and 10 (27·8 %) for EBV-specific DNA polymerase. A BamHI W fragment sequence encoding part of the EBV nuclear antigen leader protein was detected by PCR in corresponding leukocyte DNA samples. Among 21 dogs tested, 15 (71·4 %) were positive for the BamHI W fragment sequence. The specificity of the amplified DNA fragments was confirmed by DNA sequencing. Within the amplified region of the BamHI W fragment (241 bp), DNA sequences detected in 10 dogs had 99·2 % (two nucleotide variations), 99·6 % (one nucleotide variation) or 100 % identity to that of EBV. Furthermore, an EBV-encoded RNA signal was detected by in situ hybridization in dog lymphocytes, as well as in bone-marrow sections, indicating a latent infection with EBV or an EBV-like virus. In conclusion, although the sample size was small, these results showed that a widespread EBV-related gammaherpesvirus could be detected in the peripheral blood and bone marrow of pet dogs. Although no evident zoonotic transmission was detected, further studies are imperative for disclosing the biological significance of this canine EBV-like virus, which may correlate with human disorders.
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Affiliation(s)
- Shiow-Her Chiou
- Graduate Institute of Veterinary Microbiology, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Kuan-Chih Chow
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Chih-Huan Yang
- Department of Veterinary Medicine, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Shu-Fen Chiang
- Graduate Institute of Veterinary Microbiology, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Chun-Hao Lin
- Graduate Institute of Veterinary Microbiology, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
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Tsai JH, Tsai CH, Cheng MH, Lin SJ, Xu FL, Yang CC. Association of viral factors with non-familial breast cancer in Taiwan by comparison with non-cancerous, fibroadenoma, and thyroid tumor tissues. J Med Virol 2005; 75:276-81. [PMID: 15602723 DOI: 10.1002/jmv.20267] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To study the etiologic factors of non-familial breast cancer, the polymerase chain reaction (PCR) and Southern hybridization were used to detect six viruses including human papillomavirus (HPV), cytomegalovirus (CMV), Epstein-Barr virus (EBV), herpes simplex virus (HSV)-1, HSV-2, and human herpesvirus (HHV)-8 DNA in 69 patients with breast cancer and 60 specimens from non-cancerous or other individuals with thyroid tumors or fibroadenoma (non-breast cancer controls). Two specimens from patients with a familial history of breast cancer and five breast cancer specimens with negative results for beta-globin, which was used as internal control, were excluded from this study. Eight (12.9%) HSV-1, 28 (45.2%) EBV, 47 (75.8%) CMV, 8 (12.9%) HPV, and 28 (45.2%) HHV-8 positive samples out of the 62 breast cancer specimens were detected; no HSV-2 DNA was detected in any group. Among the viral gene-positive breast cancer samples, 12 (23.1%) were positive for 1 virus, 16 (30.8%) were positive for 2 viruses, 21 (40.4%) were positive for 3 viruses, and 3 (5.8%) were positive for 4 viruses. Among the viral gene-positive specimens of the control groups, only one virus, CMV, was found in the non-cancerous and thyroid tumor specimens, while multiple viruses were found in the fibroadenoma specimens. The viruses associated with breast cancer were HHV-8 > EBV (P <0.01). The viruses associated with fibroadenoma were HSV-1 and HHV-8 > EBV (P <0.01). The presence of more than one virus was found predominantly in breast cancer and exclusively found in fibroadenoma. CMV was the only virus associated with thyroid tumors.
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Affiliation(s)
- Ju-Hsin Tsai
- Department of Surgery, Chung Shan Medical University Hospital, Chung Shan Medical University, Taichung, Taiwan
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Moody CA, Scott RS, Su T, Sixbey JW. Length of Epstein-Barr virus termini as a determinant of epithelial cell clonal emergence. J Virol 2003; 77:8555-61. [PMID: 12857925 PMCID: PMC165260 DOI: 10.1128/jvi.77.15.8555-8561.2003] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Reiterated terminal sequences of Epstein-Barr virus (EBV) DNA are numerically heterogeneous among infectious virions, providing a viral measure of clonality in infected cells. After in vitro infection, carcinoma cells bearing EBV episomes with fewer terminal repeats (TRs) proliferated faster. In single-cell clones, TR number varied inversely to the quantity of latent membrane protein 2A (LMP2A) transcripts whose unspliced precursors cross joined TRs. Thus, EBV clonality may reflect selection for a TR number that optimizes LMP2A-enhanced tumor progression, with infection occurring after epithelial cell transformation.
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Affiliation(s)
- Cary A Moody
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130, USA
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10
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Abstract
Mucosal surfaces--such as the lining of the gut or the reproductive tract--are the main point of entry for viruses into the body. As such, almost all viruses interact with epithelial cells, and make use of the normal epithelial signalling and trafficking pathways of the host cell. In addition to protein receptors, carbohydrate chains of proteoglycans and epithelial-membrane glycosphingolipids have emerged as a new class of receptors for viral attachment to the host cell.
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Affiliation(s)
- Morgane Bomsel
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Département de Biologie Cellulaire, Institut Cochin, Centre National de la Recherche Scientifique, INSERM, Université René Descartes, 22 rue Mechain, 75014 Paris, France.
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11
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Chu JJH, Ng ML. Infection of polarized epithelial cells with flavivirus West Nile: polarized entry and egress of virus occur through the apical surface. J Gen Virol 2002; 83:2427-2435. [PMID: 12237424 DOI: 10.1099/0022-1317-83-10-2427] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Both polarized epithelial Vero (C1008) and non-polarized Vero (control) cells were grown on permeable cell culture inserts and infected either apically or basolaterally with West Nile (WN) or Kunjin (KUN) virus. KUN virus (closely related to WN virus) was used as a comparison. Using indirect immunofluorescence and plaque assays of productive virus titres, entry of WN and KUN viruses was confined to the apical surface of polarized epithelial cells. For the first time, these results provided evidence on the distribution of flavivirus-specific receptor(s) in polarized epithelial cells; that is to say that receptor expression was shown to be predominant at the apical surface. In addition, the release of these viruses from polarized Vero C1008 epithelial cells was also examined. Egress of WN virus strain Sarafend (S) was observed to occur predominantly at the apical surface of Vero C1008 cells. In contrast, the release of KUN virus was bi-directional from polarized Vero C1008 cells. Furthermore, disruption of the cellular microtubule network was shown to inhibit the apical release of WN (S) virus but had no effect on the release of KUN virus. Hence, the difference in the release of these closely related viruses suggested the involvement of a microtubule-dependent, polarized sorting mechanism for WN virus proteins but not for KUN virus proteins in polarized epithelial cells.
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Affiliation(s)
- J J H Chu
- Department of Microbiology, 5 Science Drive 2, National University of Singapore, 117597, Singapore1
| | - M L Ng
- Department of Microbiology, 5 Science Drive 2, National University of Singapore, 117597, Singapore1
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Favoreel HW, Van Minnebruggen G, Nauwynck HJ, Enquist LW, Pensaert MB. A tyrosine-based motif in the cytoplasmic tail of pseudorabies virus glycoprotein B is important for both antibody-induced internalization of viral glycoproteins and efficient cell-to-cell spread. J Virol 2002; 76:6845-51. [PMID: 12050399 PMCID: PMC136286 DOI: 10.1128/jvi.76.13.6845-6851.2002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pseudorabies virus (PRV), a swine alphaherpesvirus, is capable of causing viremia in vaccinated animals. Two mechanisms that may help PRV avoid recognition by the host immune system during this viremia are direct cell-to-cell spread in tissue and antibody-induced internalization of viral cell surface glycoproteins in PRV-infected blood monocytes, the carrier cells of the virus in the blood. PRV glycoprotein B (gB) is crucial during both processes. Here we show that mutating a tyrosine residue located in a YXXPhi motif in the gB cytoplasmic tail results in decreased efficiency of cell-to-cell spread and a strong reduction in antibody-induced internalization of viral cell surface glycoproteins. Mutating the dileucine motif in the gB tail led to an increased cell-to-cell spread of the virus and the formation of large syncytia.
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Affiliation(s)
- Herman W Favoreel
- Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
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Imai S, Nishikawa J, Kuroda M, Takada K. Epstein-Barr virus infection of human epithelial cells. Curr Top Microbiol Immunol 2001; 258:161-84. [PMID: 11443861 DOI: 10.1007/978-3-642-56515-1_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- S Imai
- Department of Microbiology, Kochi Medical School, Kohasu, Okoh-cho, Nankoku, Kochi 783-8505, Japan
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Affiliation(s)
- P Speck
- Microbiology-Immunology Department, Northwestern University Medical School, 303 East Chicago Avenue, Chicago, Illinois, 60611, USA
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Yang L, Maruo S, Takada K. CD21-mediated entry and stable infection by Epstein-Barr virus in canine and rat cells. J Virol 2000; 74:10745-51. [PMID: 11044119 PMCID: PMC110949 DOI: 10.1128/jvi.74.22.10745-10751.2000] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We developed an adenovirus vector for transduction of the human CD21 gene (Adv-CD21), the Epstein-Barr virus (EBV)-specific receptor on human B lymphocytes, to overcome the initial barrier of EBV infection in nonprimate mammalian cells. Inoculation of Adv-CD21 followed by exposure to recombinant EBV carrying a selectable marker resulted in the successful entry of EBV into three of seven nonprimate mammalian cell lines as evidenced by expression of EBV-determined nuclear antigen (EBNA). The EBV-susceptible cell lines included rat glioma-derived 9L, rat mammary carcinoma-derived c-SST-2, and canine kidney-derived MDCK. Subsequent selection culture with G418 yielded drug-resistant cell clones. In these cell clones, EBV existed as an episomal form, as evidenced through the Gardella gel technique. Among the known EBV latency-associated gene products, EBV-encoded small RNAs, EBNA1 and transcripts from the BamHI-A rightward reading frame (BARF0), and latent membrane protein 2A were expressed in all EBV-infected cell clones. The viral lytic events could be induced in these cell clones by simultaneous treatment with 12-O-tetradecanoylphorbol-13-acetate and n-butyric acid, but they were abortive, and infectious virus was not produced. These results indicate that once the initial barrier for attachment is overcome artificially, EBV can establish a stable infection in some nonprimate mammalian cells, and they raise the possibility that transgenic animals with the human CD21 gene could provide an animal model for EBV infection.
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Affiliation(s)
- L Yang
- Department of Tumor Virology, Institute for Genetic Medicine, Hokkaido University, Kita-ku, Sapporo 060-8638, Japan
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