BACKGROUND The bacteria Campylobacter jejuni(C.jejuni)is commonly associated with Guillane-Barrésyndrome(GBS)and irritable bowel syndrome(IBS),but studies have also linked it with Miller Fisher syndrome,reactive ...BACKGROUND The bacteria Campylobacter jejuni(C.jejuni)is commonly associated with Guillane-Barrésyndrome(GBS)and irritable bowel syndrome(IBS),but studies have also linked it with Miller Fisher syndrome,reactive arthritis and other disorders,some of which are autoimmune.It is possible that C.jejuni and its toxins may be crossreactive with some human tissues and food antigens,potentially leading to autoimmune responses.AIM To measure the immune reactivity of C.jejuni and C.jejuni cytolethal distending toxin(Cdt)antibodies with tissue and food antigens to examine their role in autoimmunities.METHODS Using enzyme-linked immunosorbent assay(ELISA)methodology,specific antibodies made against C.jejuni and C.jejuni Cdt were applied to a variety of microwell plates coated with 45 tissues and 180 food antigens.The resulting immunoreactivities were compared to reactions with control wells coated with human serum albumin(HSA)which were used as negative controls and with wells coated with C.jejuni lysate or C.jejuni Cdt which served as positive controls.RESULTS At 3 SD above the mean of control wells coated with HSA or 0.41 OD,the mouse monoclonal antibody made against C.jejuni showed moderate to high reactions with zonulin,somatotropin,acetylcholine receptor,β-amyloid and presenilin.This immune reaction was low with an additional 25 tissue antigens including asialoganglioside,and the same antibody did not react at all with another 15 tissue antigens.Examining the reaction between C.jejuni antibody and 180 food antigens,we found insignificant reactions with 163 foods but low to high immune reactions with 17 food antigens.Similarly,we examined the reaction of C.jejuni Cdt with the same tissues and food antigens.The strongest reactions were observed with zonulin,intrinsic factor and somatotropin.The reaction was moderate with 9 different tissue antigens including thyroid peroxidase,and reaction was low with another 10 different antigens,including neuronal antigens.The reaction of C.jejuni Cdt antibody with an additional 23 t展开更多
BACKGROUND Current diagnosis of hepatitis C virus(HCV)infection requires two sequential steps:testing for anti-HCV followed by HCV RNA PCR to confirm viremia.We have developed a highly sensitive and specific HCV-antig...BACKGROUND Current diagnosis of hepatitis C virus(HCV)infection requires two sequential steps:testing for anti-HCV followed by HCV RNA PCR to confirm viremia.We have developed a highly sensitive and specific HCV-antigens enzyme immunoassay(HCV-Ags EIA)for one-step diagnosis of viremic HCV infection.AIM To assess the clinical application of the HCV-Ags EIA in one-step diagnosis of viremic HCV infection in human immunodeficiency virus(HIV)-coinfected individuals.METHODS The study blindly tested HCV-Ags EIA for its performance in one-step diagnosing viremic HCV infection in 147 sera:10 without HCV or HIV infection;54 with viremic HCV monoinfection;38 with viremic HCV/HIV coinfection;and 45 with viremic HCV and non-viremic HIV coinfection.RESULTS Upon decoding,it was 100%accordance of HCV-Ags EIA to HCV infection status by HCV RNA PCR test.In five sera with HCV infection,HCV RNA was as low as 50-59 IU/mL,and four out of five tested positive for HCV-Ags EIA.Likewise,it was also 100%accordance of HCV-Ags EIA to HCV infection status by HCV RNA PCR in 83 sera with HCV and HIV coinfection,regardless if HIV infection was active or not.CONCLUSION The modified HCV-Ags EIA has a lower detection limit equivalent to serum HCV RNA levels of approximately 100 IU/mL.It is highly sensitive and specific in the setting of HIV coinfection,regardless of HIV infection status and CD4 count.These data support the clinical application of the HCV-Ags EIA in one-step diagnosis of HCV infection in HIV-infected individuals.展开更多
目的探讨嗜中性粒细胞抗原CD177在常见消化系统恶性肿瘤(食管癌、结肠癌和胰腺癌)中的表达情况与患者预后的关系,并分析与其相关的基因和细胞通路。方法自公共数据库Gene Expression Omnibus(GEO)及The Cancer Genome Atlas(TCGA)中提...目的探讨嗜中性粒细胞抗原CD177在常见消化系统恶性肿瘤(食管癌、结肠癌和胰腺癌)中的表达情况与患者预后的关系,并分析与其相关的基因和细胞通路。方法自公共数据库Gene Expression Omnibus(GEO)及The Cancer Genome Atlas(TCGA)中提取相应癌症数据集,以获取患者信息及mRNA表达数据,借助R2生物信息分析平台,以Kaplan-Meier法绘制生存曲线,分析CD177表达情况与患者预后的关系,筛选出与CD177表达显著相关的基因并进行Kyoto Encyclopedia of Genes and Genomes(KEGG)通路分析。结果在3种癌症数据集中(食管癌75例,结肠癌174例,胰腺癌132例),CD177的mRNA高表达患者的总体生存率均低于低表达患者(P=0.050,P=0.045,P=0.018)。此外,与CD177表达相关的基因在3个数据集中分别有11 927、4 100和7 493个。KEGG通路分析发现,CD177高表达时除正常消化功能的信号通路被激活外,还涉及多种炎性反应机制相关的信号通路。结论 CD177的表达水平与食管癌、结肠癌和胰腺癌患者的总体生存率相关,可能成为研究患者预后的潜在分子标志物。展开更多
文摘BACKGROUND The bacteria Campylobacter jejuni(C.jejuni)is commonly associated with Guillane-Barrésyndrome(GBS)and irritable bowel syndrome(IBS),but studies have also linked it with Miller Fisher syndrome,reactive arthritis and other disorders,some of which are autoimmune.It is possible that C.jejuni and its toxins may be crossreactive with some human tissues and food antigens,potentially leading to autoimmune responses.AIM To measure the immune reactivity of C.jejuni and C.jejuni cytolethal distending toxin(Cdt)antibodies with tissue and food antigens to examine their role in autoimmunities.METHODS Using enzyme-linked immunosorbent assay(ELISA)methodology,specific antibodies made against C.jejuni and C.jejuni Cdt were applied to a variety of microwell plates coated with 45 tissues and 180 food antigens.The resulting immunoreactivities were compared to reactions with control wells coated with human serum albumin(HSA)which were used as negative controls and with wells coated with C.jejuni lysate or C.jejuni Cdt which served as positive controls.RESULTS At 3 SD above the mean of control wells coated with HSA or 0.41 OD,the mouse monoclonal antibody made against C.jejuni showed moderate to high reactions with zonulin,somatotropin,acetylcholine receptor,β-amyloid and presenilin.This immune reaction was low with an additional 25 tissue antigens including asialoganglioside,and the same antibody did not react at all with another 15 tissue antigens.Examining the reaction between C.jejuni antibody and 180 food antigens,we found insignificant reactions with 163 foods but low to high immune reactions with 17 food antigens.Similarly,we examined the reaction of C.jejuni Cdt with the same tissues and food antigens.The strongest reactions were observed with zonulin,intrinsic factor and somatotropin.The reaction was moderate with 9 different tissue antigens including thyroid peroxidase,and reaction was low with another 10 different antigens,including neuronal antigens.The reaction of C.jejuni Cdt antibody with an additional 23 t
文摘BACKGROUND Current diagnosis of hepatitis C virus(HCV)infection requires two sequential steps:testing for anti-HCV followed by HCV RNA PCR to confirm viremia.We have developed a highly sensitive and specific HCV-antigens enzyme immunoassay(HCV-Ags EIA)for one-step diagnosis of viremic HCV infection.AIM To assess the clinical application of the HCV-Ags EIA in one-step diagnosis of viremic HCV infection in human immunodeficiency virus(HIV)-coinfected individuals.METHODS The study blindly tested HCV-Ags EIA for its performance in one-step diagnosing viremic HCV infection in 147 sera:10 without HCV or HIV infection;54 with viremic HCV monoinfection;38 with viremic HCV/HIV coinfection;and 45 with viremic HCV and non-viremic HIV coinfection.RESULTS Upon decoding,it was 100%accordance of HCV-Ags EIA to HCV infection status by HCV RNA PCR test.In five sera with HCV infection,HCV RNA was as low as 50-59 IU/mL,and four out of five tested positive for HCV-Ags EIA.Likewise,it was also 100%accordance of HCV-Ags EIA to HCV infection status by HCV RNA PCR in 83 sera with HCV and HIV coinfection,regardless if HIV infection was active or not.CONCLUSION The modified HCV-Ags EIA has a lower detection limit equivalent to serum HCV RNA levels of approximately 100 IU/mL.It is highly sensitive and specific in the setting of HIV coinfection,regardless of HIV infection status and CD4 count.These data support the clinical application of the HCV-Ags EIA in one-step diagnosis of HCV infection in HIV-infected individuals.
文摘目的探讨嗜中性粒细胞抗原CD177在常见消化系统恶性肿瘤(食管癌、结肠癌和胰腺癌)中的表达情况与患者预后的关系,并分析与其相关的基因和细胞通路。方法自公共数据库Gene Expression Omnibus(GEO)及The Cancer Genome Atlas(TCGA)中提取相应癌症数据集,以获取患者信息及mRNA表达数据,借助R2生物信息分析平台,以Kaplan-Meier法绘制生存曲线,分析CD177表达情况与患者预后的关系,筛选出与CD177表达显著相关的基因并进行Kyoto Encyclopedia of Genes and Genomes(KEGG)通路分析。结果在3种癌症数据集中(食管癌75例,结肠癌174例,胰腺癌132例),CD177的mRNA高表达患者的总体生存率均低于低表达患者(P=0.050,P=0.045,P=0.018)。此外,与CD177表达相关的基因在3个数据集中分别有11 927、4 100和7 493个。KEGG通路分析发现,CD177高表达时除正常消化功能的信号通路被激活外,还涉及多种炎性反应机制相关的信号通路。结论 CD177的表达水平与食管癌、结肠癌和胰腺癌患者的总体生存率相关,可能成为研究患者预后的潜在分子标志物。