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https://www.readbyqxmd.com/read/29844839/evaluation-of-latent-membrane-protein-1-and-microrna-155-for-the-prognostic-prediction-of-diffuse-large-b-cell-lymphoma
#1
Xue Wu, Fei Wang, Yuan Li, Xiyong Wang, Ping Liu, Haijun Zhang, Zheng Ge, Xiaoping Zhang, Chong Gao, Baoan Chen
Diffuse large B cell lymphoma (DLBCL) has previously been demonstrated to contribute to the mortality of lymphoma with various aggressive features. The prognostic role of the biomarkers latent membrane protein (LMP) 1 and microRNA-(miR)-155 in DLBCL remain controversial. The present study primarily aimed to assess the effect of LMP1 and miR-155 on the survival of DLBCL patients, and additionally evaluate the clinical features to observe their influence on outcomes, compared with previous studies. Formalin-fixed and paraffin-embedded samples were collected from our center between May 2010 and December 2011...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29795311/dnmt1-mediates-metabolic-reprogramming-induced-by-epstein-barr-virus-latent-membrane-protein-1-and-reversed-by-grifolin-in-nasopharyngeal-carcinoma
#2
Xiangjian Luo, Liping Hong, Can Cheng, Namei Li, Xu Zhao, Feng Shi, Jikai Liu, Jia Fan, Jian Zhou, Ann M Bode, Ya Cao
Cancer cells frequently adapt fundamentally altered metabolism to support tumorigenicity and malignancy. Epigenetic and metabolic networks are closely interactive, in which DNA methyltransferases (DNMTs) play important roles. Epstein-Barr virus (EBV)-encoded latent membrane protein 1 (EBV-LMP1) is closely associated with nasopharyngeal carcinoma (NPC) pathogenesis because it can trigger multiple cell signaling pathways that promote cell transformation, proliferation, immune escape, invasiveness, epigenetic modification, and metabolic reprogramming...
May 23, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29795033/k15-protein-of-kaposi-s-sarcoma-herpesviruses-increases-endothelial-cell-proliferation-and-migration-through-store-operated-calcium-entry
#3
Wei Chen, Changqing Xu, Liuqing Wang, Bing Shen, Linding Wang
Kaposi's sarcoma (KS) is a tumor of the vascular endothelium that is caused by Kaposi's sarcoma-associated herpesvirus (KSHV). K15 of KSHV is a specific gene encoding a transmembrane protein. Two highly different forms of K15, the predominant (K15P) and minor (K15M) have been identified in different KSHV strains. In genomic locations and protein topology, two K15 alleles resemble the latent membrane protein (LMP) 1 and LMP2A of Epstein⁻Barr virus. Both K15 proteins have motifs similar to those found in LMP1 and LMP2A...
May 24, 2018: Viruses
https://www.readbyqxmd.com/read/29789630/preclinical-evaluation-of-ribociclib-and-its-synergistic-effect-in-combination-with-alpelisib-in-non-keratinizing-nasopharyngeal-carcinoma
#4
Chi-Hang Wong, Brigette B Y Ma, Connie W C Hui, Kwok-Wai Lo, Edwin P Hui, Anthony T C Chan
Ribociclib is a specific cyclin dependent kinase (Cdk) 4/6 inhibitor that induces G1 arrest by blocking the formation of cyclin D1-Cdk4/6 complex and inhibiting retinoblastoma (RB) phosphorylation. Cyclin D1 is overexpressed in over 90% of nasopharyngeal carcinoma (NPC) and CCND1 gene activation plays a critical role in NPC pathogenesis. This study evaluated the preclinical activities of ribociclib in NPC cell lines and patient derived xenograft (PDX) models. Over 95% cell growth inhibition was observed at 96 hours after ribociclib treatment...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29785139/blockage-of-store-operated-ca-2-entry-antagonizes-epstein-barr-virus-promoted-angiogenesis-by-inhibiting-ca-2-signaling-regulated-vegf-production-in-nasopharyngeal-carcinoma
#5
Jiaxiang Ye, Junqi Huang, Qian He, Weilin Zhao, Xiaoying Zhou, Zhe Zhang, Yongqiang Li, Jiazhang Wei, Jinyan Zhang
Background: Epstein-Barr virus (EBV) actively contributes to the pathological process of nasopharyngeal carcinoma (NPC) by enabling NPC cells to acquire various capacities required for their malignant biological actions. Our earlier works demonstrated that EBV-encoded latent membrane protein 1 (LMP1) enhanced vascular endothelial growth factor (VEGF)-mediated angiogenesis by boosting store-operated Ca2+ entry (SOCE) upon extracellular epidermal growth factor (EGF) stimulation. However, the antagonistic effects of SOCE blockage on EBV-promoted angiogenesis must be appropriately evaluated in vivo, and the global effect of EBV infection on the EGF-elicited cytosolic Ca2+ signaling, which regulates VEGF-mediated angiogenesis remains to be further clarified...
2018: Cancer Management and Research
https://www.readbyqxmd.com/read/29775480/titan-cells-formation-in-cryptococcus-neoformans-is-finely-tuned-by-environmental-conditions-and-modulated-by-positive-and-negative-genetic-regulators
#6
Benjamin Hommel, Liliane Mukaremera, Radames J B Cordero, Carolina Coelho, Christopher A Desjardins, Aude Sturny-Leclère, Guilhem Janbon, John R Perfect, James A Fraser, Arturo Casadevall, Christina A Cuomo, Françoise Dromer, Kirsten Nielsen, Alexandre Alanio
The pathogenic fungus Cryptococcus neoformans exhibits morphological changes in cell size during lung infection, producing both typical size 5 to 7 μm cells and large titan cells (> 10 μm and up to 100 μm). We found and optimized in vitro conditions that produce titan cells in order to identify the ancestry of titan cells, the environmental determinants, and the key gene regulators of titan cell formation. Titan cells generated in vitro harbor the main characteristics of titan cells produced in vivo including their large cell size (>10 μm), polyploidy with a single nucleus, large vacuole, dense capsule, and thick cell wall...
May 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29765906/epstein-barr-virus-and-human-papillomaviruses-interactions-and-their-roles-in-the-initiation-of-epithelial-mesenchymal-transition-and-cancer-progression
#7
REVIEW
Farhan S Cyprian, Halema F Al-Farsi, Semir Vranic, Saghir Akhtar, Ala-Eddin Al Moustafa
Oncoviruses are implicated in around 20% of all human cancers including both solid and non-solid malignancies. Epstein-Barr virus (EBV) and human papillomaviruses (HPVs) are the most common oncoviruses worldwide. Currently, it is well established that onco-proteins of EBV (LMP1, LMP2A, and EBNA1) and high-risk HPVs (E5 and E6/E7) play an important role in the initiation and/or progression of several human carcinomas, including cervical, oral, and breast. More significantly, it has been recently pointed out that viral onco-proteins of EBV and high-risk HPVs can be co-present and consequently cooperate to initiate and/or amplify epithelial-mesenchymal transition (EMT), which is the hallmark of cancer progression and metastasis...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29761078/novel-immunotherapy-options-for-extranodal-nk-t-cell-lymphoma
#8
REVIEW
Boyu Hu, Yasuhiro Oki
Extranodal NK/T-cell lymphoma (ENKTCL) is a highly aggressive mature NK/T-cell neoplasm marked by NK-cell phenotypic expression of CD3ε and CD56. While the disease is reported worldwide, there is a significant geographic variation with its highest incidence in East Asian countries possibly related to the frequent early childhood exposure of Epstein-Barr virus (EBV) and specific ethnic-genetical background, which contributes to the tumorigenesis. Historically, anthracycline-based chemotherapy such as CHOP (cyclophosphamide, adriamycin, vincristine, and prednisone) was used, but resulted in poor outcomes...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29749553/ebv%C3%A2-lmp1-is-involved-in-vasculogenic-mimicry-formation-via-vegfa-vegfr1-signaling-in-nasopharyngeal-carcinoma
#9
San Xu, Ju Bai, Zhou Zhuan, Bo Li, Zhibao Zhang, Xia Wu, Xiangjian Luo, Lifang Yang
The Epstein-Barr virus latent membrane protein 1 (EBV‑LMP1) is an oncoviral protein that plays an important role in oncogenic transformation in EBV‑associated nasopharyngeal carcinoma (NPC). Our previous studies demonstrated that LMP1 increased VEGFA expression and upregulated angiogenesis in NPC. Vasculogenic mimicry (VM) is a mechanism by which tumor cells can obtain nutrients to survive, and VM has been observed in numerous types of tumors. However, the occurrence and significance of VM in NPC and the relationship between LMP1 and VM have not yet been evaluated...
May 3, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29749010/borrelia-burgdorferi-surface-located-lmp1-protein-processed-into-region-specific-polypeptides-that-are-critical-for-microbial-persistence
#10
Xuran Zhuang, Xiuli Yang, Amanda S Altieri, Daniel C Nelson, Utpal Pal
One of the Borrelia burgdorferi virulence determinants, annotated as Lmp1, is a surface-exposed, conserved, and potential multi-domain protein involved in various functions in spirochete infectivity. Lmp1 contributes to host-pathogen interactions and evasion of host adaptive immunity by spirochetes. Here, we show that in diverse B. burgdorferi species, Lmp1 exists as distinct, region-specific, and lower molecular mass polypeptides encompassing 1 or more domains, including independent N-terminal and middle regions and a combined middle and C-terminal region...
May 10, 2018: Cellular Microbiology
https://www.readbyqxmd.com/read/29723998/the-ebv-encoded-oncoprotein-lmp1-induces-an-epithelial-to-mesenchymal-transition-emt-via-its-ctar1-domain-through-integrin-mediated-erk-mapk-signalling
#11
Mhairi A Morris, Louise Laverick, Wenbin Wei, Alexandra M Davis, Samantha O'Neill, Liam Wood, Jack Wright, Christopher W Dawson, Lawrence S Young
The Epstein⁻Barr virus (EBV)-encoded latent membrane protein 1 (LMP1) oncogene can induce profound effects on epithelial growth and differentiation including many of the features of the epithelial-to-mesenchymal transition (EMT). To better characterise these effects, we used the well-defined Madin Darby Canine Kidney (MDCK) epithelial cell model and found that LMP1 expression in these cells induces EMT as defined by characteristic morphological changes accompanied by loss of E-cadherin, desmosomal cadherin and tight junction protein expression...
May 1, 2018: Cancers
https://www.readbyqxmd.com/read/29675003/role-of-micrornas-and-exosomes-in-helicobacter-pylori-and-epstein-barr-virus-associated-gastric-cancers
#12
REVIEW
Iva Polakovicova, Sofia Jerez, Ignacio A Wichmann, Alejandra Sandoval-Bórquez, Nicolás Carrasco-Véliz, Alejandro H Corvalán
Emerging evidence suggests that chronic inflammation caused by pathogen infection is connected to the development of various types of cancer. It is estimated that up to 20% of all cancer deaths is linked to infections and inflammation. In gastric cancer, such triggers can be infection of the gastric epithelium by either Helicobacter pylori ( H. pylori ), a bacterium present in half of the world population; or by Epstein-Barr virus (EBV), a double-stranded DNA virus which has recently been associated with gastric cancer...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29606628/the-relationship-between-environmental-factors-and-the-profile-of-epstein-barr-virus-antibodies-in-the-lytic-and-latent-infection-periods-in-healthy-populations-from-endemic-and-non-endemic-nasopharyngeal-carcinoma-areas-in-china
#13
Yong-Qiao He, Wen-Qiong Xue, Feng-Hua Xu, Ya-Fei Xu, Jiang-Bo Zhang, Huan-Lin Yu, Qi-Sheng Feng, Li-Zhen Chen, Su-Mei Cao, Qing Liu, Jianbing Mu, Yi-Xin Zeng, Wei-Hua Jia
Our previous study found that smoking was associated with an elevated level of the antibody against VCA in the Epstein-Barr virus (EBV) lytic phase, which was an important predictive marker of the risk of nasopharyngeal carcinoma (NPC). It remained unknown whether environmental factors were associated with the levels of other EBV antibodies, such as Zta-IgA, EA-IgA, EBNA1-IgA, and LMP1-IgA, in the lytic and latent infection periods. We aimed to investigate the possible environmental inducers that could affect EBV antibody levels in two independent healthy male populations from endemic NPC areas in South China (N=1498) and non-endemic NPC areas in North China (N=1961)...
April 2018: EBioMedicine
https://www.readbyqxmd.com/read/29561768/new-insights-from-elucidating-the-role-of-lmp1-in-nasopharyngeal-carcinoma
#14
REVIEW
Kathy H Y Shair, Akhil Reddy, Vaughn S Cooper
Latent membrane protein 1 (LMP1) is an Epstein-Barr virus (EBV) oncogenic protein that has no intrinsic enzymatic activity or sequence homology to cellular or viral proteins. The oncogenic potential of LMP1 has been ascribed to pleiotropic signaling properties initiated through protein-protein interactions in cytosolic membrane compartments, but the effects of LMP1 extend to nuclear and extracellular processes. Although LMP1 is one of the latent genes required for EBV-immortalization of B cells, the biology of LMP1 in the pathogenesis of the epithelial cancer nasopharyngeal carcinoma (NPC) is more complex...
March 21, 2018: Cancers
https://www.readbyqxmd.com/read/29491233/characterization-of-in-vitro-expanded-virus-specific-t-cells-for-adoptive-immunotherapy-against-virus-infection
#15
Toshiaki Ono, Yuriko Fujita, Tetsuro Matano, Satoshi Takahashi, Tomohiro Morio, Ai Kawana-Tachikawa
Adoptive transfer of virus-specific T cells has emerged as a promising therapeutic approach for treatment of virus infections in immunocompromised hosts. Characterization of virus-specific T cells provides essential information about the curative mechanism of the treatment. In this study, we developed a T cell epitope mapping system for 718 overlapping peptides spanning 6 proteins of 3 viruses (pp65 and IE1 from cytomegalovirus; LMP1, EBNA1, and BZLF1 from Epstein-Barr virus; Penton from adenovirus). Peripheral blood mononuclear cells (PBMCs) from 33 healthy Japanese donors were stimulated with these peptides and virus-specific CD4+ and CD8+ T cells were expanded in vitro in the presence of interleukin (IL) 4 and IL7...
March 22, 2018: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29464072/limd1-is-induced-by-and-required-for-lmp1-signaling-and-protects-ebv-transformed-cells-from-dna-damage-induced-cell-death
#16
Ling Wang, Mary E A Howell, Brooke McPeak, Katrina Riggs, Carissa Kohne, Jether Uel Yohanon, Daniel E Foxler, Tyson V Sharp, Jonathan P Moorman, Zhi Q Yao, Shunbin Ning
LIMD1 (LIM domain-containing protein 1) is considered as a tumor suppressor, being deregulated in many cancers to include hematological malignancies; however, very little is known about the underlying mechanisms of its deregulation and its roles in carcinogenesis. Epstein-Barr Virus (EBV) is associated with a panel of malignancies of lymphocytic and epithelial origin. Using high throughput expression profiling, we have previously identified LIMD1 as a common marker associated with the oncogenic transcription factor IRF4 in EBV-related lymphomas and other hematological malignancies...
January 19, 2018: Oncotarget
https://www.readbyqxmd.com/read/29462212/epstein-barr-virus-nuclear-antigen-ebna-lp-is-essential-for-transforming-na%C3%A3-ve-b-cells-and-facilitates-recruitment-of-transcription-factors-to-the-viral-genome
#17
Agnieszka Szymula, Richard D Palermo, Amr Bayoumy, Ian J Groves, Mohammed Ba Abdullah, Beth Holder, Robert E White
The Epstein-Barr virus (EBV) nuclear antigen leader protein (EBNA-LP) is the first viral latency-associated protein produced after EBV infection of resting B cells. Its role in B cell transformation is poorly defined, but it has been reported to enhance gene activation by the EBV protein EBNA2 in vitro. We generated EBNA-LP knockout (LPKO) EBVs containing a STOP codon within each repeat unit of internal repeat 1 (IR1). EBNA-LP-mutant EBVs established lymphoblastoid cell lines (LCLs) from adult B cells at reduced efficiency, but not from umbilical cord B cells, which died approximately two weeks after infection...
February 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29435490/c-terminal-farnesylation-of-uch-l1-plays-a-role-in-transport-of-epstein-barr-virus-primary-oncoprotein-lmp1-to-exosomes
#18
E Kobayashi, M Aga, S Kondo, C Whitehurst, T Yoshizaki, J S Pagano, J Shackelford
Increasing evidence shows that exosomes are key regulators in cancer cell-to-cell communication. Several reports on Epstein-Barr virus (EBV)-related malignancies demonstrate that latent membrane protein 1 (LMP1) secreted by exosomes derived from EBV- or LMP1-positive cells can promote cancer progression and metastasis. However, the mechanism by which LMP1 is loaded into exosomes is still poorly understood. Here, we examined whether the process of LMP1 loading into exosomes is linked to the multifunctional molecule of the ubiquitin system-ubiquitin C-terminal hydrolase-L1 (UCH-L1)...
January 2018: MSphere
https://www.readbyqxmd.com/read/29399111/-epigallocatechin-3-gallate-inhibition-of-epstein-barr-virus-spontaneous-lytic-infection-involves-downregulation-of-latent-membrane-protein-1
#19
Sufang Liu, Hongde Li, Min Tang, Ya Cao
The Epstein-Barr virus (EBV) lytic cycle contributes to the development of EBV-associated diseases. EBV-encoded latent membrane protein 1 (LMP1) is key to EBV lytic replication, and our previous work indicated that epigallocatechin-3-gallate (EGCG) inhibited constitutive EBV lytic infection through the suppression of LMP1-activated phosphoinositide 3-kinase/Akt and mitogen-activated protein kinase kinase/extracellular signal-related protein kinase 1/2 signaling. The present study demonstrated that LMP1 in CNE-LMP1 constructed cells significantly induced the expression of the EBV lytic proteins BZLF1 (P<0...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29382879/borrelia-burgdorferi-surface-protein-lmp1-facilitates-pathogen-dissemination-through-ticks-as-studied-by-an-artificial-membrane-feeding-system
#20
Juraj Koci, Quentin Bernard, Xiuli Yang, Utpal Pal
In its natural infection cycle, the pathogen of Lyme borreliosis transits between a tick vector and a mammalian host. As relatively a minor fraction of spirochetes transits between the host and the vector precluding their reliable detection at early infection, artificial membrane feeders emerged as useful tools to study roles of spirochete proteins in pathogen entry, persistence, and exit through ticks. Here we report the development of a modified membrane feeder to study the role of a Borrelia burgdorferi surface protein called Lmp1 in spirochete transitions between the murine host and ticks...
January 30, 2018: Scientific Reports
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