LMP1-induced cell death may contribute to the emergency of its oncogenic property.
BACKGROUND AND OBJECTIVES: Epstein-Barr Virus (EBV) Latent Membrane Protein 1 (LMP1) is linked to a variety of malignancies including Hodgkin's disease, lymphomas, nasopharyngeal and gastric carcinoma. LMP1 exerts its transforming or oncogenic activity mainly through the recruitment of intracel...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2013-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3634045?pdf=render |
| _version_ | 1819262991947792384 |
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| author | Guillaume Brocqueville Papa Alioune Ndour Tan-Sothéa Ouk Arnaud Le Goff Caroline De Witte Alexandra Mougel Jean Coll Véronique Fafeur Xuefen Le Bourhis Eric Adriaenssens |
| author_facet | Guillaume Brocqueville Papa Alioune Ndour Tan-Sothéa Ouk Arnaud Le Goff Caroline De Witte Alexandra Mougel Jean Coll Véronique Fafeur Xuefen Le Bourhis Eric Adriaenssens |
| author_sort | Guillaume Brocqueville |
| collection | DOAJ |
| description | BACKGROUND AND OBJECTIVES: Epstein-Barr Virus (EBV) Latent Membrane Protein 1 (LMP1) is linked to a variety of malignancies including Hodgkin's disease, lymphomas, nasopharyngeal and gastric carcinoma. LMP1 exerts its transforming or oncogenic activity mainly through the recruitment of intracellular adapters via LMP1 C-terminal Transformation Effector Sites (TES) 1 and 2. However, LMP1 is also reported to elicit significant cytotoxic effects in some other cell types. This cytotoxic effect is quite intriguing for an oncogenic protein, and it is unclear whether both functional aspects of the protein are related or mutually exclusive. METHODOLOGY AND PRINCIPAL FINDINGS: Using different ectopic expression systems in both Madin-Darby canine kidney (MDCK) epithelial cells and human embryonic kidney HEK-293 cells, we observe that LMP1 ectopic expression massively induces cell death. Furthermore, we show that LMP1-induced cytotoxicity mainly implies LMP1 C-terminal transformation effector sites and TRADD recruitment. However, stable expression of LMP1 in the same cells, is found to be associated with an increase of cell survival and an acquisition of epithelial mesenchymal transition phenotype as evidenced by morphological modifications, increased cell mobility, increased expression of MMP9 and decreased expression of E-cadherin. Our results demonstrate for the first time that the cytotoxic and oncogenic effects of LMP1 are not mutually exclusive but may operate sequentially. We suggest that in a total cell population, cells resistant to LMP1-induced cytotoxicity are those that could take advantage of LMP1 oncogenic activity by integrating LMP1 signaling into the pre-existent signaling network. Our findings thus reconcile the apparent opposite apoptotic and oncogenic effects described for LMP1 and might reflect what actually happens on LMP1-induced cell transformation after EBV infection in patients. |
| first_indexed | 2024-12-23T20:06:30Z |
| format | Article |
| id | doaj.art-aca05f995d8d4a07bf00399cb2844371 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-23T20:06:30Z |
| publishDate | 2013-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-aca05f995d8d4a07bf00399cb28443712022-12-21T17:32:55ZengPublic Library of Science (PLoS)PLoS ONE1932-62032013-01-0184e6074310.1371/journal.pone.0060743LMP1-induced cell death may contribute to the emergency of its oncogenic property.Guillaume BrocquevillePapa Alioune NdourTan-Sothéa OukArnaud Le GoffCaroline De WitteAlexandra MougelJean CollVéronique FafeurXuefen Le BourhisEric AdriaenssensBACKGROUND AND OBJECTIVES: Epstein-Barr Virus (EBV) Latent Membrane Protein 1 (LMP1) is linked to a variety of malignancies including Hodgkin's disease, lymphomas, nasopharyngeal and gastric carcinoma. LMP1 exerts its transforming or oncogenic activity mainly through the recruitment of intracellular adapters via LMP1 C-terminal Transformation Effector Sites (TES) 1 and 2. However, LMP1 is also reported to elicit significant cytotoxic effects in some other cell types. This cytotoxic effect is quite intriguing for an oncogenic protein, and it is unclear whether both functional aspects of the protein are related or mutually exclusive. METHODOLOGY AND PRINCIPAL FINDINGS: Using different ectopic expression systems in both Madin-Darby canine kidney (MDCK) epithelial cells and human embryonic kidney HEK-293 cells, we observe that LMP1 ectopic expression massively induces cell death. Furthermore, we show that LMP1-induced cytotoxicity mainly implies LMP1 C-terminal transformation effector sites and TRADD recruitment. However, stable expression of LMP1 in the same cells, is found to be associated with an increase of cell survival and an acquisition of epithelial mesenchymal transition phenotype as evidenced by morphological modifications, increased cell mobility, increased expression of MMP9 and decreased expression of E-cadherin. Our results demonstrate for the first time that the cytotoxic and oncogenic effects of LMP1 are not mutually exclusive but may operate sequentially. We suggest that in a total cell population, cells resistant to LMP1-induced cytotoxicity are those that could take advantage of LMP1 oncogenic activity by integrating LMP1 signaling into the pre-existent signaling network. Our findings thus reconcile the apparent opposite apoptotic and oncogenic effects described for LMP1 and might reflect what actually happens on LMP1-induced cell transformation after EBV infection in patients.http://europepmc.org/articles/PMC3634045?pdf=render |
| spellingShingle | Guillaume Brocqueville Papa Alioune Ndour Tan-Sothéa Ouk Arnaud Le Goff Caroline De Witte Alexandra Mougel Jean Coll Véronique Fafeur Xuefen Le Bourhis Eric Adriaenssens LMP1-induced cell death may contribute to the emergency of its oncogenic property. PLoS ONE |
| title | LMP1-induced cell death may contribute to the emergency of its oncogenic property. |
| title_full | LMP1-induced cell death may contribute to the emergency of its oncogenic property. |
| title_fullStr | LMP1-induced cell death may contribute to the emergency of its oncogenic property. |
| title_full_unstemmed | LMP1-induced cell death may contribute to the emergency of its oncogenic property. |
| title_short | LMP1-induced cell death may contribute to the emergency of its oncogenic property. |
| title_sort | lmp1 induced cell death may contribute to the emergency of its oncogenic property |
| url | http://europepmc.org/articles/PMC3634045?pdf=render |
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