Objectives To identify whether Epstein Barr virus (EBV) encoded latent membrane protein 1 (LMP1) can induce tumor necrosis factor receptor associated factor 1 (TRAF1) expression and promote its anti apoptosis acti...Objectives To identify whether Epstein Barr virus (EBV) encoded latent membrane protein 1 (LMP1) can induce tumor necrosis factor receptor associated factor 1 (TRAF1) expression and promote its anti apoptosis activity via the NF κB signaling pathway, and assess that LMP1 suppresses apoptosis in nasopharyngeal carcinoma (NPC) Methods A stable transfected cell line HNE2 LMP1 was established by introducing LMP1 cDNA into HNE2 cells Transactivation of TRAF1 was determined by luciferase reporter assay, while expression of TRAF1 mRNA was detected by RT PCR and expression of TRAF1 protein and caspase 3 by Western blot analysis Apoptosis activity was observed through fluorescence staining Results LMP1 induced TRAF1 expression in NPC cells and caused a decrease in apoptosis This induction could be blocked by antisense LMP1 Moreover, LMP1 mediated induction of a TRAF1 promoter driven reporter gene was significantly impaired when the κB site κB1 or κB5 was disrupted, whereas mutation of κB3 had only a minor effect on LMP1 dependent up regulation of the reporter gene Conclusion LMP1 induces TRAF1 expression and promotes its anti apoptosis activity via the NF κB signaling pathway, which may be one of the mechanisms that LMP1 uses to suppress apoptosis in NPC cells展开更多
AIM:To verify the methylation status of CDH1, DAPK, COX2, hMLH1 and CDKN2A genes and to evaluate their association with Helicobacter pylori (H. pylori)-cagA+ and Epstein Barr virus (EBV) infections in gastric adenocar...AIM:To verify the methylation status of CDH1, DAPK, COX2, hMLH1 and CDKN2A genes and to evaluate their association with Helicobacter pylori (H. pylori)-cagA+ and Epstein Barr virus (EBV) infections in gastric adenocarcinomas.METHODS: Methylation-specific PCR (MSP) assay was performed in 89 primary gastric carcinomas (intestinal and diffuse types). Microsatellite instability (MSI) analysis was performed using the BAT26 primer set and PCR products were analyzed with the ABI PRISM 3100 Genetic Analyzer using Genescan 3.7 software (Applied Biosystems). Detection of H. pylori and genotyping were performed by PCR, using specifi c primers for ureaseC and cagA genes. The presence of EBV was assessed by in situ hybridization. Statistical analyses were performed using the χ2 or Fisher's exact test.RESULTS: The most frequent hypermethylated gene was COX-2 (63.5%) followed by DAPK (55.7%), CDH1 (51%), CDKN2A (36%) and hMLH1 (30.3%). Intestinal and diffuse adenocarcinomas showed different methylation profiles and there was an association between methylation of E-CDH1 and H. pylori-cagA+ in the intestinal adenocarcinoma type. MSI was correlated with hMLH1 methylation. There was an inverse correlation between DAPK hypermethylation and MSI.CONCLUSION: We found a strong association between CDH1 methylation and H. pylori-cagA+ in intestinal-type gastric cancer, association of MSI and better prognosis and an heterogeneous COX-2 overexpression.展开更多
Although many studies have found a kind of a relationship between an Epstein-Barr Virus (EBV) and the development of Multiple Sclerosis (MS), a fundamental aspect of this relationship remains uncertain. What is the ca...Although many studies have found a kind of a relationship between an Epstein-Barr Virus (EBV) and the development of Multiple Sclerosis (MS), a fundamental aspect of this relationship remains uncertain. What is the cause of Multiple Sclerosis (MS)? In this study, we re-analysed the data as published by Wandinger et al. and were able to establish a new insight: without an Epstein-Barr Virus (EBV) infection no development of Multiple Sclerosis (MS). Furthermore, we determined a highly significant causal relationship between Epstein-Barr Virus (EBV) and multiple sclerosis. Altogether, Epstein-Barr Virus (EBV) is the cause of multiple sclerosis (p-value 0.0004251570).展开更多
Objective To detect whether Epstein Barr virus (EBV) harbors in nasopharyngeal lymphoid hyperplasia (NPLH) which is frequently to be seen in Guangzhou, a high incidence area of nasopharyngeal carcinoma (NPC), ...Objective To detect whether Epstein Barr virus (EBV) harbors in nasopharyngeal lymphoid hyperplasia (NPLH) which is frequently to be seen in Guangzhou, a high incidence area of nasopharyngeal carcinoma (NPC), and to explore the relation between NPLH and development of NPC Methods Twenty four 10% formalin fixed, paraffin embedded biopsies oef patients with NPLH and elevated serum IgA antibody titer (≥1∶20) against viral capsid antigen of EB virus (IgA/VCA) were collected from the archives of the Department of Pathology, Sun Yat sen University of Medical Sciences during the period of January to June, 1993 PCR plus Southern blotting hybridization for detection of EBV DNA W fragment and in situ hybridization for detection of EB virus encoded small RNAs (EBERs) were performed All the patients were followed up more than 5 years Results Twenty two of 24 (91 7%) NPLH tissues contained EBV DNA A few definitely EBERs positive B lymphocytes could be found in 17 out of 24 specimens (70 8%) Neither NPC nor any EBV associated malignancies were developed in all of these 24 patients up to date Conclusion Most of the NPLH tissues taken from the patients with an elevated serum IgA/VCA titer carry EBV, which is harbouring in the nuclei of a few infiltrating and hyperplastic B lymphocytes The NPLH without epithelial dysplasia can not be recognized as a precancerous lesion, and EBV infection in these lesions is not an important event, having no substantial significance in development of NPC展开更多
Epstein Barr virus （EBV） positive mucocutaneous ulcers（EBVMCU） form part of a spectrum of EBV-associatedlymphoproliferative disease. They have been reportedin the setting of immunosenescence and iatrogenicimmunosu...Epstein Barr virus （EBV） positive mucocutaneous ulcers（EBVMCU） form part of a spectrum of EBV-associatedlymphoproliferative disease. They have been reportedin the setting of immunosenescence and iatrogenicimmunosuppression, affecting the oropharyngeal mucosa,skin and gastrointestinal tract （GIT）. Case reports andseries to date suggest a benign natural history respondingto conservative management, particularly in the GIT. Wereport an unusual case of EBVMCU in the colon, arisingin the setting of immunosuppression in the treatment ofCrohn＇s disease, with progression to Hodgkin lymphoma18 mo after cessation of infliximab. The patient presentedwith multiple areas of segmental colonic ulceration,histologically showing a polymorphous infiltrate withEBV positive Reed-Sternberg-like cells. A diagnosisof EBVMCU was made. The ulcers failed to regressupon cessation of infliximab and methotrexate for 18mo. Following commencement of prednisolone for herCrohn＇s disease, the patient developed widespreadHodgkin lymphoma which ultimately presented as alife-threatening lower GIT bleed requiring emergencycolectomy. This is the first report of progression ofEBVMCU to Hodgkin lymphoma, in the setting of ongoingiatrogenic immunosuppression and inflammatory boweldisease.展开更多
Strongyloidiasis stercoralis can cause disease when larvae invade the human body through the skin or mucosa and can also infect a host when the host ingests its eggs.[1]Strongyloidiasis lacks characteristic manifestat...Strongyloidiasis stercoralis can cause disease when larvae invade the human body through the skin or mucosa and can also infect a host when the host ingests its eggs.[1]Strongyloidiasis lacks characteristic manifestations,and its clinical symptoms are related to the immune response of the host and the degree of infection.Immunodefi cient patients with underlying disease or who are receiving long-term corticosteroid treatment are more prone to developing severe disease.[2]The present study reports a case of Strongyloides stercoralis-induced sepsis and acute respiratory distress syndrome(ARDS)in a patient with Guillain-Barrésyndrome.展开更多
Epstein-Barr virus (EBV) encoded latent membrane protein 1 (LMP1) may trigger the transcription factor AP-1 including c-Jun and c-fos. In this report, using a Tet-on LMP1 HNE2 cell line which is a dual-stable LMP1 int...Epstein-Barr virus (EBV) encoded latent membrane protein 1 (LMP1) may trigger the transcription factor AP-1 including c-Jun and c-fos. In this report, using a Tet-on LMP1 HNE2 cell line which is a dual-stable LMP1 integrated nasopharyngeal carcinoma (NPC) cell line and the expression of LMP1 in which could be regulated by the Tet-on system, we show that Jun B can efficiently form a new heterodimeric complex with the c-Jun protein under the regulation of LMP1, phosphorylation of c-Jun (ser 63, ser 73) and Jun B is involved in the process of the new heterodimeric formation. We also find that this heterodimeric form can bind to the AP-1 consensus sequence. Transfection studies suggest that JNK interaction protein (JIP) could inhibit the heterodimer formation of c-Jun and Jun B through blocking the AP-1 signaling pathway triggered by LMP1. The interaction and function between c-Jun protein and Jun B protein increase the repertoire of possible regulatory complexes by LMP1 that could play an important role in the regulation of transcription of specific cellular genes in the process of genesis of nasopharyngeal carcinoma.展开更多
Abstract:Objective To elucidate the mechanisms by which Epstein-Barr virus-encoded latent membrane protein 1 activates NF-κB in nasopharyngeal carcinoma cells.Methods A tetracycline-regulated LMP1-expressing nasophar...Abstract:Objective To elucidate the mechanisms by which Epstein-Barr virus-encoded latent membrane protein 1 activates NF-κB in nasopharyngeal carcinoma cells.Methods A tetracycline-regulated LMP1-expressing nasopharyngeal carcinoma cell line, Tet-on-LMP1-HNE2, was used as the cell model. The kinetics of the expression of proteins, including LMP1, IκBα and IκBβ, was analyzed by Western blotting. The subcellular localization of NF-κB (p65) was detected by indirect immunofluorescence assay. The NF-κB transactivity was studied by transient transfection and reporter gene assay. Results IκBα was phosphorylated and degraded after the inducible expression of LMP1, although the total protein levels remained stable. The steady-state level of total IκBβ protein may have resulted from the initiation of an autoregulation loop after the activation of NF-κB. No change in the IκBβ level was detected. NF-κB (p65) was translocated from the cytoplasm to the nucleus following degradation of IκBα. After the introduction of the dominant-negative mutant of IκBα (Del 71) into Tet-on-LMP1-HNE2 cells, both nuclear translocation and transactivation of NF-κB induced by LMP1 was significantly inhibited. Conclusions The results indicated that in nasopharyngeal carcinoma cells, LMP1 activated NF-κB via phosphorylation and degradation of IκBα, but not IκBβ. The dominant-negative mutant of IκBα (Del 71) could completely inhibit both the nuclear translocation and transactivation of NF-κB induced by LMP1.展开更多
ObjectiveTo study the effects of dendritic cells (DC) transfected with recombinant vaccinia virus encoding Epstein Barr virus (EBV) latent membrane protein 2A(LMP2A) gene,and to provide evidence for further investiga...ObjectiveTo study the effects of dendritic cells (DC) transfected with recombinant vaccinia virus encoding Epstein Barr virus (EBV) latent membrane protein 2A(LMP2A) gene,and to provide evidence for further investigation on the therapeutic vaccines against EBV associated malignancies. MethodsMature DC were transfected with EBV LMP2A recombinant vaccinia virus (rVV LMP2A). Before and after the transfection,the expression of surface antigens on mature DC including CD1a,CD83,CD40,CD80,HLA DR was measured by fluorescence activated cell sorter (FACS) and the function of DC to stimulate allogeneic T cells proliferation was measured by mixed leukocyte reactions (MLR). ResultsLMP2A protein was highly expressed (66.1 %) in DC after the transfection of rVV LMP2A. No significant changes in the primary surface antigens expression and in the MLR were detected during the transfection. Transfected DC still had strong potential in stimulating the proliferation of allogeneic T cells. ConclusionRecombinant vaccinia virus was an effective and non perturbing vector to mediate the transfection of LMP2A into DC. The functions of mature DC were not affected significantly by the transfection of Vac LMP2A. This study could provide evidence for the further immunotherapy of EBV associated malignancies,e.g. nasopharyngeal carcinoma (NPC).展开更多
Liver transplantation has emerged as a life-saving treatment for several patients with acute liver failure, end stage liver disease and primary hepatic malignancies. However, long term immunosuppressive therapy aiming...Liver transplantation has emerged as a life-saving treatment for several patients with acute liver failure, end stage liver disease and primary hepatic malignancies. However, long term immunosuppressive therapy aiming to reduce the risk of transplant rejection increases the incidence of several com-plications including malignancies. This is illustrated by the observation of a high ratio between observed and expected cases of lymphoproliferative disorders following liver transplantation. Despite a huge heterogeneity in morphological appearance of these disorders ranging from reactive-like lesions to real lymphomas, they are collectively termed posttransplant lymphoproliferative disorders. In this review we will provide an overview of this rare but challenging disorder as a complication of liver transplantation.展开更多
To the Editor:Currently known syndromes of acute post-infectious or inflammatory demyelination include acute disseminated encephalomyelitis,encephalitis,transverse myelitis(TM),and Guillain–Barrésyndrome(GBS).De...To the Editor:Currently known syndromes of acute post-infectious or inflammatory demyelination include acute disseminated encephalomyelitis,encephalitis,transverse myelitis(TM),and Guillain–Barrésyndrome(GBS).Demyelination is frequently limited to the central or peripheral nervous systems.The coexistence of myelitis and demyelinating peripheral neuropathy has only been reported in a few children[1,2]and young adults.[3]Also,concomitant TM and GBS in elderly immunocompetent patients has been rarely described.展开更多
In order to explore the relationship between Epstein Barr virus (EBV) and pathogenesis of multiple myeloma (MM), the presence of EBV DNA in mononuclear cells of bone marrow (BMMC) and peripheral blood (PBMC) taken f...In order to explore the relationship between Epstein Barr virus (EBV) and pathogenesis of multiple myeloma (MM), the presence of EBV DNA in mononuclear cells of bone marrow (BMMC) and peripheral blood (PBMC) taken from 23 multiple myeloma patients who were neither posttransplanted nor HIV positive were examined by polymerase chain reaction (PCR). Meanwhile the presence of EBV EBERs in bioptic bone marrow's specimens of 4 MM patients were examined by in situ hybridization (ISH). Acute leukemia, aplastic anemia and malnourished anemia patients were taken as control. It showed EBV DNA detective rate in BMMC (69 6%) and in PBMC (39 1%) of MM patients were higher significantly than control groups (P<0 05). The positive signals of EBERs were located in BMMC and the EBV positive samples detected by ISH were consistent with those by PCR. The results indicate that EBV is closely correlated to pathogenesis of MM.展开更多
Introduction: This paper reports the results of a post marketing clinical study that tested the antiviral properties of Gene-Eden-VIRTM. Specifically, the clinical study tested the effect of Gene-Eden-VIR on the sever...Introduction: This paper reports the results of a post marketing clinical study that tested the antiviral properties of Gene-Eden-VIRTM. Specifically, the clinical study tested the effect of Gene-Eden-VIR on the severity, duration, and frequency of symptoms reported by individuals infected with various viruses. The viruses included the Human Papillomavirus (HPV), Herpes Simplex Virus (HSV), Epstein Barr Virus (EBV), Human Cytomegalovirus (HCMV) and Hepatitis C Virus (HCV). The symptoms included abnormal Pap smear, low and high grade cervical dysplasia, warts, blisters, cold sores, hives, skin tabs, panic attacks, depression, kidney problems, sleeping problems, liver problems, fever, fatigue, sore throat, swollen lymph nodes, diarrhea, and weight loss. Treatment: A capsule of Gene-Eden-VIR includes five natural ingredients: 100 mg of quercetin, 150 mg of green tea extract, 50 mg of a cinnamon extract, 25 mg of a licorice extract, and 100 mcg of selenium. The dosage was 1, 2, 3, or 4 capsules per day. The duration of treatment was 2 to 54 weeks. Population: The study population consisted of 60 infected individuals, ages 20 to 66. Results: The participants reported no side effects after taking Gene-Eden-VIR. Seventy three percent of the individuals treated with Gene-Eden-VIR reported a decrease in their symptoms. Specifically, they reported a decrease in the severity (p = 0.006, n = 45), duration (p = 0.009, n = 34), and frequency of their symptoms (p Conclusions: This post marketing clinical study showed that Gene-Eden-VIR is a safe and effective antiviral treatment. Specifically, the clinical study showed that Gene-Eden-VIR is a safe and effective treatment against the Human Papillomavirus (HPV), Herpes Simplex Virus (HSV), Epstein Barr Virus (EBV), Human Cytomegalovirus (HCMV), and Hepatitis C Virus (HCV). Therefore, health care practitioners should recommend Gene-Eden-VIR as a safe and effective antiviral treatment against these viruses.展开更多
Background: Epstein Barr Virus infection (EBV) could be associated with cardiovascular disease, including myocarditis. We informed a case of EBV infection presenting initially as myocarditis, followed 5 days later by ...Background: Epstein Barr Virus infection (EBV) could be associated with cardiovascular disease, including myocarditis. We informed a case of EBV infection presenting initially as myocarditis, followed 5 days later by the typical symptoms of infectious mononucleosis. Case Presentation: A 19-year-old man with persistent retrosternal chest pain was admitted to the emergency department. On physical examination, the patient had sub-febrile fever (37.2°C) and palpable cervical lymphadenopathy, with no hepatosplenomegaly. Initial ECG has repolarization abnormalities in leads II, aVF and III. Laboratory testing revealed elevated cardiac enzymes and liver enzymes (high sensitive troponin I levels 3000 ng/mL, aspartate transaminase 158 U/L, alanine transaminase 100 U/L). Blood white cells were 10,500 μL, platelet level were low 98,000 (thrombocytopenia), and lenfo-monocytosis in complete blood count. We hospitalized the patients the intensive coronary unit (ICU) because of high troponin levels. We recognized hypokinesia of the posterolateral wall of the left ventricle with mild impaired systolic function and increased perimyocardial brightness by echocardiography. Antibody serology tests showed that the anti-EBV capsid antigen IgM (EBV-VCA) was positive, EBV-VCA) IgG was negative. Other etiologies were excluded. Therefore, the patient was referred to cardiac positron emission tomography due to technic problems of magnetic resonance imaging device. We documented in positron emission tomography imaging that increased <sup>18</sup>F-FDG uptake on posterior and posterolateral walls of left ventricle (indicating a large jeopardized area). We diagnosed suspected diagnosis of myocarditis without associated pericarditis. We monitored the patient and gave beta blocker, and aldosterone antagonists. Complications in the intensive care unit not occurred. We discharged patients after one week. After three weeks, we re-evaluated the patient. We not observed wall segment motion abnormality on echocardiography and liver tests were near 展开更多
基金StateKeyBasicResearchProgram FundamentalInvestigationonHumanCarcinogenesis (No .G19980 5 12 0 1) +1 种基金NationalScienceFundforDistinguishedYoungScholars (No .3 95 2 5 0 2 2 ) theNationalNaturalScienceFoundationofChina (No 3 0 10 0 0 0 5 )
文摘Objectives To identify whether Epstein Barr virus (EBV) encoded latent membrane protein 1 (LMP1) can induce tumor necrosis factor receptor associated factor 1 (TRAF1) expression and promote its anti apoptosis activity via the NF κB signaling pathway, and assess that LMP1 suppresses apoptosis in nasopharyngeal carcinoma (NPC) Methods A stable transfected cell line HNE2 LMP1 was established by introducing LMP1 cDNA into HNE2 cells Transactivation of TRAF1 was determined by luciferase reporter assay, while expression of TRAF1 mRNA was detected by RT PCR and expression of TRAF1 protein and caspase 3 by Western blot analysis Apoptosis activity was observed through fluorescence staining Results LMP1 induced TRAF1 expression in NPC cells and caused a decrease in apoptosis This induction could be blocked by antisense LMP1 Moreover, LMP1 mediated induction of a TRAF1 promoter driven reporter gene was significantly impaired when the κB site κB1 or κB5 was disrupted, whereas mutation of κB3 had only a minor effect on LMP1 dependent up regulation of the reporter gene Conclusion LMP1 induces TRAF1 expression and promotes its anti apoptosis activity via the NF κB signaling pathway, which may be one of the mechanisms that LMP1 uses to suppress apoptosis in NPC cells
文摘AIM:To verify the methylation status of CDH1, DAPK, COX2, hMLH1 and CDKN2A genes and to evaluate their association with Helicobacter pylori (H. pylori)-cagA+ and Epstein Barr virus (EBV) infections in gastric adenocarcinomas.METHODS: Methylation-specific PCR (MSP) assay was performed in 89 primary gastric carcinomas (intestinal and diffuse types). Microsatellite instability (MSI) analysis was performed using the BAT26 primer set and PCR products were analyzed with the ABI PRISM 3100 Genetic Analyzer using Genescan 3.7 software (Applied Biosystems). Detection of H. pylori and genotyping were performed by PCR, using specifi c primers for ureaseC and cagA genes. The presence of EBV was assessed by in situ hybridization. Statistical analyses were performed using the χ2 or Fisher's exact test.RESULTS: The most frequent hypermethylated gene was COX-2 (63.5%) followed by DAPK (55.7%), CDH1 (51%), CDKN2A (36%) and hMLH1 (30.3%). Intestinal and diffuse adenocarcinomas showed different methylation profiles and there was an association between methylation of E-CDH1 and H. pylori-cagA+ in the intestinal adenocarcinoma type. MSI was correlated with hMLH1 methylation. There was an inverse correlation between DAPK hypermethylation and MSI.CONCLUSION: We found a strong association between CDH1 methylation and H. pylori-cagA+ in intestinal-type gastric cancer, association of MSI and better prognosis and an heterogeneous COX-2 overexpression.
文摘Although many studies have found a kind of a relationship between an Epstein-Barr Virus (EBV) and the development of Multiple Sclerosis (MS), a fundamental aspect of this relationship remains uncertain. What is the cause of Multiple Sclerosis (MS)? In this study, we re-analysed the data as published by Wandinger et al. and were able to establish a new insight: without an Epstein-Barr Virus (EBV) infection no development of Multiple Sclerosis (MS). Furthermore, we determined a highly significant causal relationship between Epstein-Barr Virus (EBV) and multiple sclerosis. Altogether, Epstein-Barr Virus (EBV) is the cause of multiple sclerosis (p-value 0.0004251570).
文摘Objective To detect whether Epstein Barr virus (EBV) harbors in nasopharyngeal lymphoid hyperplasia (NPLH) which is frequently to be seen in Guangzhou, a high incidence area of nasopharyngeal carcinoma (NPC), and to explore the relation between NPLH and development of NPC Methods Twenty four 10% formalin fixed, paraffin embedded biopsies oef patients with NPLH and elevated serum IgA antibody titer (≥1∶20) against viral capsid antigen of EB virus (IgA/VCA) were collected from the archives of the Department of Pathology, Sun Yat sen University of Medical Sciences during the period of January to June, 1993 PCR plus Southern blotting hybridization for detection of EBV DNA W fragment and in situ hybridization for detection of EB virus encoded small RNAs (EBERs) were performed All the patients were followed up more than 5 years Results Twenty two of 24 (91 7%) NPLH tissues contained EBV DNA A few definitely EBERs positive B lymphocytes could be found in 17 out of 24 specimens (70 8%) Neither NPC nor any EBV associated malignancies were developed in all of these 24 patients up to date Conclusion Most of the NPLH tissues taken from the patients with an elevated serum IgA/VCA titer carry EBV, which is harbouring in the nuclei of a few infiltrating and hyperplastic B lymphocytes The NPLH without epithelial dysplasia can not be recognized as a precancerous lesion, and EBV infection in these lesions is not an important event, having no substantial significance in development of NPC
文摘Epstein Barr virus （EBV） positive mucocutaneous ulcers（EBVMCU） form part of a spectrum of EBV-associatedlymphoproliferative disease. They have been reportedin the setting of immunosenescence and iatrogenicimmunosuppression, affecting the oropharyngeal mucosa,skin and gastrointestinal tract （GIT）. Case reports andseries to date suggest a benign natural history respondingto conservative management, particularly in the GIT. Wereport an unusual case of EBVMCU in the colon, arisingin the setting of immunosuppression in the treatment ofCrohn＇s disease, with progression to Hodgkin lymphoma18 mo after cessation of infliximab. The patient presentedwith multiple areas of segmental colonic ulceration,histologically showing a polymorphous infiltrate withEBV positive Reed-Sternberg-like cells. A diagnosisof EBVMCU was made. The ulcers failed to regressupon cessation of infliximab and methotrexate for 18mo. Following commencement of prednisolone for herCrohn＇s disease, the patient developed widespreadHodgkin lymphoma which ultimately presented as alife-threatening lower GIT bleed requiring emergencycolectomy. This is the first report of progression ofEBVMCU to Hodgkin lymphoma, in the setting of ongoingiatrogenic immunosuppression and inflammatory boweldisease.
基金supported by the Medical Scientific Research Foundation of Guangdong Province(A2022506)Natural Science Foundation of Guangdong Province(2023A1515010267)Cerebrovascular Disease Youth Innovation(Z-2016-20-2201).
文摘Strongyloidiasis stercoralis can cause disease when larvae invade the human body through the skin or mucosa and can also infect a host when the host ingests its eggs.[1]Strongyloidiasis lacks characteristic manifestations,and its clinical symptoms are related to the immune response of the host and the degree of infection.Immunodefi cient patients with underlying disease or who are receiving long-term corticosteroid treatment are more prone to developing severe disease.[2]The present study reports a case of Strongyloides stercoralis-induced sepsis and acute respiratory distress syndrome(ARDS)in a patient with Guillain-Barrésyndrome.
文摘Epstein-Barr virus (EBV) encoded latent membrane protein 1 (LMP1) may trigger the transcription factor AP-1 including c-Jun and c-fos. In this report, using a Tet-on LMP1 HNE2 cell line which is a dual-stable LMP1 integrated nasopharyngeal carcinoma (NPC) cell line and the expression of LMP1 in which could be regulated by the Tet-on system, we show that Jun B can efficiently form a new heterodimeric complex with the c-Jun protein under the regulation of LMP1, phosphorylation of c-Jun (ser 63, ser 73) and Jun B is involved in the process of the new heterodimeric formation. We also find that this heterodimeric form can bind to the AP-1 consensus sequence. Transfection studies suggest that JNK interaction protein (JIP) could inhibit the heterodimer formation of c-Jun and Jun B through blocking the AP-1 signaling pathway triggered by LMP1. The interaction and function between c-Jun protein and Jun B protein increase the repertoire of possible regulatory complexes by LMP1 that could play an important role in the regulation of transcription of specific cellular genes in the process of genesis of nasopharyngeal carcinoma.
基金ThisprojectwassupportedbytheStateKeyBasicResearchProgram FundamentalInvestigationonHumanCarcinogenesis (No G19980 5 12 0 1) +2 种基金theNationalScienceFundationforDistinguishedYoungScholars (No 395 2 0 2 2 ) andtheChinaMedicalBoardofNewYork Inc (N
文摘Abstract:Objective To elucidate the mechanisms by which Epstein-Barr virus-encoded latent membrane protein 1 activates NF-κB in nasopharyngeal carcinoma cells.Methods A tetracycline-regulated LMP1-expressing nasopharyngeal carcinoma cell line, Tet-on-LMP1-HNE2, was used as the cell model. The kinetics of the expression of proteins, including LMP1, IκBα and IκBβ, was analyzed by Western blotting. The subcellular localization of NF-κB (p65) was detected by indirect immunofluorescence assay. The NF-κB transactivity was studied by transient transfection and reporter gene assay. Results IκBα was phosphorylated and degraded after the inducible expression of LMP1, although the total protein levels remained stable. The steady-state level of total IκBβ protein may have resulted from the initiation of an autoregulation loop after the activation of NF-κB. No change in the IκBβ level was detected. NF-κB (p65) was translocated from the cytoplasm to the nucleus following degradation of IκBα. After the introduction of the dominant-negative mutant of IκBα (Del 71) into Tet-on-LMP1-HNE2 cells, both nuclear translocation and transactivation of NF-κB induced by LMP1 was significantly inhibited. Conclusions The results indicated that in nasopharyngeal carcinoma cells, LMP1 activated NF-κB via phosphorylation and degradation of IκBα, but not IκBβ. The dominant-negative mutant of IκBα (Del 71) could completely inhibit both the nuclear translocation and transactivation of NF-κB induced by LMP1.
基金This paper is supported by grant from the National Natural Science Foundation of China(No.30 1 70 880 )
文摘ObjectiveTo study the effects of dendritic cells (DC) transfected with recombinant vaccinia virus encoding Epstein Barr virus (EBV) latent membrane protein 2A(LMP2A) gene,and to provide evidence for further investigation on the therapeutic vaccines against EBV associated malignancies. MethodsMature DC were transfected with EBV LMP2A recombinant vaccinia virus (rVV LMP2A). Before and after the transfection,the expression of surface antigens on mature DC including CD1a,CD83,CD40,CD80,HLA DR was measured by fluorescence activated cell sorter (FACS) and the function of DC to stimulate allogeneic T cells proliferation was measured by mixed leukocyte reactions (MLR). ResultsLMP2A protein was highly expressed (66.1 %) in DC after the transfection of rVV LMP2A. No significant changes in the primary surface antigens expression and in the MLR were detected during the transfection. Transfected DC still had strong potential in stimulating the proliferation of allogeneic T cells. ConclusionRecombinant vaccinia virus was an effective and non perturbing vector to mediate the transfection of LMP2A into DC. The functions of mature DC were not affected significantly by the transfection of Vac LMP2A. This study could provide evidence for the further immunotherapy of EBV associated malignancies,e.g. nasopharyngeal carcinoma (NPC).
文摘Liver transplantation has emerged as a life-saving treatment for several patients with acute liver failure, end stage liver disease and primary hepatic malignancies. However, long term immunosuppressive therapy aiming to reduce the risk of transplant rejection increases the incidence of several com-plications including malignancies. This is illustrated by the observation of a high ratio between observed and expected cases of lymphoproliferative disorders following liver transplantation. Despite a huge heterogeneity in morphological appearance of these disorders ranging from reactive-like lesions to real lymphomas, they are collectively termed posttransplant lymphoproliferative disorders. In this review we will provide an overview of this rare but challenging disorder as a complication of liver transplantation.
基金This study was supported by a grant from the Shanghai Municipal Science and Technology Major Project(No.2021SHZDZX0100)and the Fundamental Research Funds for the Central Universities.
文摘To the Editor:Currently known syndromes of acute post-infectious or inflammatory demyelination include acute disseminated encephalomyelitis,encephalitis,transverse myelitis(TM),and Guillain–Barrésyndrome(GBS).Demyelination is frequently limited to the central or peripheral nervous systems.The coexistence of myelitis and demyelinating peripheral neuropathy has only been reported in a few children[1,2]and young adults.[3]Also,concomitant TM and GBS in elderly immunocompetent patients has been rarely described.
文摘In order to explore the relationship between Epstein Barr virus (EBV) and pathogenesis of multiple myeloma (MM), the presence of EBV DNA in mononuclear cells of bone marrow (BMMC) and peripheral blood (PBMC) taken from 23 multiple myeloma patients who were neither posttransplanted nor HIV positive were examined by polymerase chain reaction (PCR). Meanwhile the presence of EBV EBERs in bioptic bone marrow's specimens of 4 MM patients were examined by in situ hybridization (ISH). Acute leukemia, aplastic anemia and malnourished anemia patients were taken as control. It showed EBV DNA detective rate in BMMC (69 6%) and in PBMC (39 1%) of MM patients were higher significantly than control groups (P<0 05). The positive signals of EBERs were located in BMMC and the EBV positive samples detected by ISH were consistent with those by PCR. The results indicate that EBV is closely correlated to pathogenesis of MM.
文摘Introduction: This paper reports the results of a post marketing clinical study that tested the antiviral properties of Gene-Eden-VIRTM. Specifically, the clinical study tested the effect of Gene-Eden-VIR on the severity, duration, and frequency of symptoms reported by individuals infected with various viruses. The viruses included the Human Papillomavirus (HPV), Herpes Simplex Virus (HSV), Epstein Barr Virus (EBV), Human Cytomegalovirus (HCMV) and Hepatitis C Virus (HCV). The symptoms included abnormal Pap smear, low and high grade cervical dysplasia, warts, blisters, cold sores, hives, skin tabs, panic attacks, depression, kidney problems, sleeping problems, liver problems, fever, fatigue, sore throat, swollen lymph nodes, diarrhea, and weight loss. Treatment: A capsule of Gene-Eden-VIR includes five natural ingredients: 100 mg of quercetin, 150 mg of green tea extract, 50 mg of a cinnamon extract, 25 mg of a licorice extract, and 100 mcg of selenium. The dosage was 1, 2, 3, or 4 capsules per day. The duration of treatment was 2 to 54 weeks. Population: The study population consisted of 60 infected individuals, ages 20 to 66. Results: The participants reported no side effects after taking Gene-Eden-VIR. Seventy three percent of the individuals treated with Gene-Eden-VIR reported a decrease in their symptoms. Specifically, they reported a decrease in the severity (p = 0.006, n = 45), duration (p = 0.009, n = 34), and frequency of their symptoms (p Conclusions: This post marketing clinical study showed that Gene-Eden-VIR is a safe and effective antiviral treatment. Specifically, the clinical study showed that Gene-Eden-VIR is a safe and effective treatment against the Human Papillomavirus (HPV), Herpes Simplex Virus (HSV), Epstein Barr Virus (EBV), Human Cytomegalovirus (HCMV), and Hepatitis C Virus (HCV). Therefore, health care practitioners should recommend Gene-Eden-VIR as a safe and effective antiviral treatment against these viruses.
文摘Background: Epstein Barr Virus infection (EBV) could be associated with cardiovascular disease, including myocarditis. We informed a case of EBV infection presenting initially as myocarditis, followed 5 days later by the typical symptoms of infectious mononucleosis. Case Presentation: A 19-year-old man with persistent retrosternal chest pain was admitted to the emergency department. On physical examination, the patient had sub-febrile fever (37.2°C) and palpable cervical lymphadenopathy, with no hepatosplenomegaly. Initial ECG has repolarization abnormalities in leads II, aVF and III. Laboratory testing revealed elevated cardiac enzymes and liver enzymes (high sensitive troponin I levels 3000 ng/mL, aspartate transaminase 158 U/L, alanine transaminase 100 U/L). Blood white cells were 10,500 μL, platelet level were low 98,000 (thrombocytopenia), and lenfo-monocytosis in complete blood count. We hospitalized the patients the intensive coronary unit (ICU) because of high troponin levels. We recognized hypokinesia of the posterolateral wall of the left ventricle with mild impaired systolic function and increased perimyocardial brightness by echocardiography. Antibody serology tests showed that the anti-EBV capsid antigen IgM (EBV-VCA) was positive, EBV-VCA) IgG was negative. Other etiologies were excluded. Therefore, the patient was referred to cardiac positron emission tomography due to technic problems of magnetic resonance imaging device. We documented in positron emission tomography imaging that increased <sup>18</sup>F-FDG uptake on posterior and posterolateral walls of left ventricle (indicating a large jeopardized area). We diagnosed suspected diagnosis of myocarditis without associated pericarditis. We monitored the patient and gave beta blocker, and aldosterone antagonists. Complications in the intensive care unit not occurred. We discharged patients after one week. After three weeks, we re-evaluated the patient. We not observed wall segment motion abnormality on echocardiography and liver tests were near
