Abstract：
:Helicobacter pylori activates extracellular-signal related (ERK) kinases in gastric epithelial cells, via transactivation of the EGF receptor (EGFR). H. pylori activation of EGFR may be relevant to epithelial hyperproliferation and gastric carcinogenesis. The aim of this study was to develop an 'In-Cell Western' (ICW) assay for quantitative examination of H. pylori-induced epithelial signalling, to enable the role of the EGFR in H. pylori-induced phosphorylation of ERK in epithelial cells to be ascertained. H. pylori strains were co-incubated with A431 and AGS cells. pERK and total ERK were quantified in situ using ICW analysis. H. pylori strains both with, and without a cag PAI, and Helicobacter felis, significantly increased pERK levels in A431 cells. The EGFR inhibitor EKB-569 dose-dependently reduced H. pylori-induced ERK phosphorylation in A431 and AGS cells. A significantly lower reduction was observed with cag+ strains in A431 but not AGS cells. The cag PAI was not necessary for EGFR signal transactivation. These data suggest that H. pylori induces pERK in epithelial cells partly via the EGFR pathway. Additional signalling mechanisms are likely to be involved in H. pylori-induced ERK phosphorylation. ICW analysis is a rapid quantitative method for evaluating the effects of inhibitors on H. pylori-induced cell signalling pathways of relevance to gastric carcinogenesis.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Du Y,Danjo K,Robinson PA,Crabtree JEdoi
10.1016/j.micinf.2007.03.004subject
Has Abstractpub_date
2007-06-01 00:00:00pages
838-46issue
7eissn
1286-4579issn
1769-714Xpii
S1286-4579(07)00105-0journal_volume
9pub_type
杂志文章abstract：:Infection of colonic epithelial cells by Shigella is associated with the type III secretion system, which serves as a molecular syringe to inject effectors into host cells. This system includes an extracellular needle used as a conduit for secreted proteins. Two of these proteins, IpaB and IpaD, dock at the needle tip...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.03.010
更新日期：2014-07-01 00:00:00
abstract：:Apoptosis signal-regulating kinase 1 (ASK1) is a mitogen-activated protein kinase kinase kinase which plays pivotal roles in stress and immune responses. This review is focused on three major subjects on ASK1: the regulatory mechanisms of the kinase activity, the pathophysiological roles in stress response and innate ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2005.12.001
更新日期：2006-04-01 00:00:00
abstract：:Staphylococcus aureus infections are of major importance in human and veterinary medicine. Studies of the virulence of this bacterium are complicated by inconsistent results obtained in different animal models. We searched for an uncomplicated and inexpensive model suitable to study virulence of poultry strains of S. ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2012.09.006
更新日期：2012-11-01 00:00:00
abstract：:The Gram-negative bacterium Burkholderia cepacia has recently emerged as an important opportunistic pathogen in humans. This review focuses on the cellular aspects of B. cepacia infection and the dynamics of the B. cepacia-host cell interaction, including recent advances in our understanding of the ability of B. cepac...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(01)01389-2
更新日期：2001-04-01 00:00:00
abstract：:Malaria is an infectious disease caused by parasites of the genus Plasmodium. This intraerythrocytic protozoan produces hemozoin (HZ), an insoluble crystalline metabolite resulting from the heme detoxification mechanism. This review will focus on HZ biosynthesis and synthetic preparation, but in particular on its effe...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2010.07.001
更新日期：2010-11-01 00:00:00
abstract：:A non-toxigenic tox gene-bearing (NTTB) Corynebacterium ulcerans was grown from the wound of a 61-year-old gardener and in a nasal specimen from the patient's asymptomatic dog. The two isolates were similar in terms of antibiogram, multilocus sequence typing (ST341), virulence genes, and only three SNPs were found to ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.07.004
更新日期：2015-10-01 00:00:00
abstract：:The vif gene of human immunodeficiency virus type 1 (HIV-1) is essential for virus growth in non-permissive cells such as H9. To elucidate the mechanism of action of the Vif protein, vif mutants, which show trans-dominant negative effects on the replication of HIV-1, would be useful tools. In this study, a new assay s...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(02)01646-5
更新日期：2002-10-01 00:00:00
abstract：:Intramuscular immunization with DNA vaccines has been shown to induce a broad range of immune responses and protective immunity in many animal models, but it is less effective in primates. One reason for this may be the low expression of vector-encoded antigen in cells. Here we report that the use of vaccine vector (p...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.06.010
更新日期：2006-09-01 00:00:00
abstract：:Purging HIV-1 to cure the infection in patients undergoing suppressive antiretroviral therapy requires targeting all possible viral reservoirs. Other than the memory CD4(+) T cells, several other HIV-1 reservoirs have been identified. HIV-1 infection in the brain as a reservoir is well documented, but not fully charac...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.05.006
更新日期：2015-09-01 00:00:00
abstract：:Influenza A virus (IAV) is a pulmonary pathogen, responsible for significant yearly morbidity and mortality. Due to the absence of highly effective antiviral therapies and vaccine, as well as the constant threat of an emerging pandemic strain, there is considerable need to better understand the host-pathogen interacti...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2018.03.005
更新日期：2018-01-01 00:00:00
abstract：:Grain feeding seems to promote the growth and acid resistance of Escherichia coli in fattening beef cattle, and acid-resistant E. coli are more likely to survive the human gastric stomach. When cattle were fed hay for only five days, the number and acid resistance of E. coli decreased dramatically. ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)00286-0
更新日期：2000-01-01 00:00:00
abstract：:CCR5-tropic (R5) immunodeficiency virus type 1 (HIV-1) strains are highly transmissible during the early stage of infection in humans, whereas CXCR4-tropic (X4) strains are less transmissible. This study aimed to explore the basis for early phase R5 and X4 HIV-1 infection in vivo by using humanized mice dually challen...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.02.002
更新日期：2015-05-01 00:00:00
abstract：:Human immunodeficiency virus-1 (HIV-1) infects cells by membrane fusion that is mediated by the envelope proteins gp120/gp41 and the cellular receptors CD4 and CCR5. During this process, some conserved viral epitopes are temporarily exposed and may induce a neutralizing antibody response when fixed in the fusogenic co...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.03.001
更新日期：2006-05-01 00:00:00
abstract：:Orientia tsutsugamushi, an obligate intracellular bacterium, was isolated for the first time in 1930. Infections by virulent strains are characterized by fever, rash, eschar, pneumonia, myocarditis, and disseminated intravascular coagulation. Here we review the general aspects of O. tsutsugamushi and immune responses ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01352-6
更新日期：2001-01-01 00:00:00
abstract：:A common theme in bacterial disease is the manipulation of the eukaryotic cytoskeleton by pathogenic factors. Understanding how virulence factors operate to achieve these alterations is a growing and important research effort. This review focuses on several virulence factors from the pathogen Salmonella, and considers...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2004.08.001
更新日期：2004-11-01 00:00:00
abstract：:A number of inbred lines of chickens have been shown to be resistant or susceptible to systemic salmonellosis caused by Salmonella enterica serovar Gallinarum in adult birds, or by S. enterica serovar Enteritidis and S. enterica serovar Typhimurium in young chicks. Resistant lines show only moderate pathology and low ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(02)01635-0
更新日期：2002-09-01 00:00:00
abstract：:This review summarizes recent work from our laboratory demonstrating the activation of B lymphocytes, macrophages and dendritic cells by DNA from three different protozoan parasites of cattle and humans that is qualitatively similar to the now well-described effects of CpG-containing bacterial DNA. This novel mechanis...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(02)01623-4
更新日期：2002-07-01 00:00:00
abstract：:Francisella tularensis causes the zoonosis tularemia in humans, and inhaled F. tularensis ssp. novicida induces lethal murine tularemia. Transcription of virulence factors in F. novicida is regulated by macrophage growth locus A (mglA), a global regulator required for bacterial replication in macrophages in vitro. We ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.04.008
更新日期：2008-06-01 00:00:00
abstract：:The purpose of this study was to investigate the in vitro antiviral properties of pterocarnin A, extracted from the bark of Pterocarya stenoptera (Juylandaceae). Results showed that pterocarnin A exhibited anti-herpes simplex virus (HSV) activity. It had a low selectivity index (SI) value and only possessed some level...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2004.03.009
更新日期：2004-07-01 00:00:00
abstract：:Trypanosoma cruzi the cause of Chagas disease persists in tissues of infected experimental animals and humans. Here we demonstrate the persistence of the parasite in adipose tissue from of three of 10 elderly seropositive patients with chronic chagasic heart disease. Nine control patients had no parasites in the fat. ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.06.002
更新日期：2011-11-01 00:00:00
abstract：:To increase knowledge of the pathogenic potential of the Burkholderia cepacia complex (BCC), we investigated the effects of reference strains of the nine BCC species on human bronchial epithelial cells in vitro. B. multivorans exhibited the highest rates of adherence to and internalization by host cells. Two out of th...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2007.10.002
更新日期：2008-01-01 00:00:00
abstract：:Emerging evidence identifies multiple roles for nucleoside-diphosphate-kinase in host-microbe interaction. We provide the first synopsis of utilization of this molecule by various microorganisms during colonization of host tissues. Additionally, we propose novel mechanisms this effector may participate in, which could...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2011.10.002
更新日期：2012-03-01 00:00:00
abstract：:Repetitive exposure of macrophages to microbial antigen is known to tolerize them to further stimulation and to inhibit proinflammatory cytokine release. Using transgenic (Tg) mice that incorporate the entire HIV-1 genome we have previously shown that toll like receptor (TLR)-2, -4, and -9 ligands induced tolerance as...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.06.002
更新日期：2006-08-01 00:00:00
abstract：:Anti-retroviral therapy is useful to treat human immunodeficiency virus type 1 (HIV-1)-infected individuals, but has some major problems, such as the generation of multidrug-resistant viruses. To develop a novel supplemental or alternative therapeutic for CCR5-tropic (R5) HIV-1 infection, we generated a recombinant ve...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2016.12.004
更新日期：2017-01-01 00:00:00
abstract：:Francisella tularensis induces apoptosis within macrophages but the temporal and spatial modulation through activation of caspase-1, caspase-3, and the anti-apoptosis nuclear transcription factor B (NF-kappaB) is not known. Whether escape of the bacteria into the cytosol is sufficient and/or essential for activation o...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2009.11.003
更新日期：2010-02-01 00:00:00
abstract：:E protein is a membrane component of severe acute respiratory syndrome coronavirus (SARS-CoV). Disruption of E protein may reduce viral infectivity. Thus, the SARS-CoV E protein is considered a potential target for the development of antiviral drugs. However, the cellular immune responses to E protein remain unclear i...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.05.008
更新日期：2006-08-01 00:00:00
abstract：:Genomics is accelerating the progress in data generation and interpretation in the global analyses of components of cells, including the spectrum of lipids, RNA, metabolites, proteins, mutational phenotypes or DNA methylation sites. Integration of the knowledge generated by these diverse strategies is predicted to hav...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2005.11.018
更新日期：2006-05-01 00:00:00
abstract：:We previously showed that human corneal epithelial cells (HCECs) express Toll-like receptors (TLRs), which recognize gram-positive bacteria and respond to Staphylococcus aureus infection by the expression and secretion of proinflammatory cytokines and beta-defensin-2 (hBD2). In this study, we further elucidated the un...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.07.006
更新日期：2006-02-01 00:00:00
abstract：:A robust and reliable cell culture system for serum-derived HCV (HCVser) has not been established yet because of the presence of neutralizing antibody and tropism for infection. To overcome this obstacle, we employed a lipid-mediated protein intracellular delivery reagent (PIDR) that permits internalization of protein...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.01.005
更新日期：2011-04-01 00:00:00
abstract：:In schistosomiasis, the current control strategy does not prevent reinfection, therefore, vaccine strategies are essential to combat the Schistosoma mansoni. The efficacy vaccine depends on parasite stage and effective adjuvant. We have recently demonstrated that S. mansoni schistosomula tegument (Smteg) is able to ac...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2012.10.007
更新日期：2013-01-01 00:00:00
