Abstract：
:Pseudomonas aeruginosa, a significant cause of human morbidity and mortality, uses a type 3 secretion system (T3SS) to inject effector toxins into host cells. We previously reported that P. aeruginosa uses ADP-ribosyltransferase (ADPr) activity of the T3SS effector ExoS for intracellular replication. T3SS translocon (ΔpopB)-mutants, which can export, but not translocate effectors across host membranes, retained intracellular replication. We hypothesized that secreted effectors mediate translocon-independent intracellular replication. Translocon mutants of PAO1 lacking one or more of its three known effectors (ExoS, ExoT and ExoY) were used. All translocon mutants, irrespective of effectors expressed, localized to intracellular vacuoles. Translocon-effector null mutants and translocon-exoS mutants showed defective intracellular replication. Mutants in exoT, exoY or both replicated as efficiently as translocon mutants expressing all effectors. Complementation of translocon-effector null mutants with native exoS or a membrane localization domain mutant of exoS, but not the ADPr mutant exoS (pUCPexoSE381D), restored intracellular replication, correlating with increased bacteria per vacuole. Thus, P. aeruginosa is capable of intravacuolar replication that requires ExoS ADPr activity, but not the translocon. These data suggest that T3SS effectors can participate in pathogenesis without translocon-mediated translocation across host membranes, and that intracellular bacteria can contribute to P. aeruginosa pathogenesis within epithelial cells.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Hritonenko V,Evans DJ,Fleiszig SMdoi
10.1016/j.micinf.2012.08.007subject
Has Abstractpub_date
2012-12-01 00:00:00pages
1366-73issue
15eissn
1286-4579issn
1769-714Xpii
S1286-4579(12)00217-1journal_volume
14pub_type
杂志文章abstract：:The role of virus-derived small RNAs (vsRNAs) has been identified as an antiviral mechanism in plants, arthropods, and nematodes. Although mammalian DNA viruses have been observed to encode functional miRNAs, whether RNA virus infection generates functional vsRNAs remains under discussion. This article reviews the mos...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2015.04.005
更新日期：2015-08-01 00:00:00
abstract：:This review elaborates on recent insights gained on the dynamic aspects of interactions between pathogen and the host intracellular machinery in tuberculosis infection. In addition we will also discuss the utility of adopting a systems biology approach, both for a better understanding of TB biology, and for the develo...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2010.10.009
更新日期：2011-02-01 00:00:00
abstract：:Phagocytosis is important in immune defense and development in vertebrates and invertebrates. It leads to swift ingestion of microorganisms and dying cells by phagocytes. How particles are recognized is not well understood. Studies in insects, and Drosophila in particular, argue that these are powerful model systems t...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)00304-x
更新日期：2000-03-01 00:00:00
abstract：:Intensive care unit (ICU)-acquired lower respiratory tract infections include acute tracheobronchitis and hospital-acquired and ventilator-associated pneumonia (VAP). Nosocomial pneumonia is the second most common hospital-acquired infection and the leading cause of death in hospital-acquired infections. The mortality...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2004.12.001
更新日期：2005-02-01 00:00:00
abstract：:In developed countries, enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a leading cause of bloody diarrhea and renal failures in human. Understanding strategies employed by EHEC to colonize the intestine is of major importance since to date no cure exists to eradicate the pathogen. In this study, the adaptive res...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.09.008
更新日期：2015-01-01 00:00:00
abstract：:Our previous study demonstrated the anti-apoptosis function of the human immunodeficiency virus type 1 (HIV-1) vpu gene product in normal CD4+ T lymphocytes. In this study, using sequences obtained from the HIV sequence database, we compared vpu sequences from 184 preparations of various subtypes of HIV-1 from diverse...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2004.09.017
更新日期：2005-02-01 00:00:00
abstract：:Innate lymphoid cells (ILCs) are the innate counterpart of T cells. Upon infection or injury, ILCs react promptly to direct the developing immune response to the one most adapted to the threat facing the organism. Therefore, ILCs play an important role early in resistance to infection, but also to maintain homeostasis...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2018.05.003
更新日期：2018-01-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.09.016
更新日期：2006-03-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(00)01298-3
更新日期：2000-10-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2016.08.001
更新日期：2016-12-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(02)01656-8
更新日期：2002-10-01 00:00:00
abstract：:In this paper we evaluate the role of human γδ T cells in control of Francisella tularensis infection. Using an in vitro model of infection, a reduction in bacterial numbers was detected in the presence of human γδ T cells for both attenuated LVS and virulent SCHU S4 strains of F. tularensis. Antibody neutralisation o...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2012.02.001
更新日期：2012-07-01 00:00:00
abstract：:A psittacosis epidemic linked to fulmar hunting occurred on the Faroe Islands in the 1930s. This study investigates a plausible explanation to the 20% human mortality in this outbreak. Phylogenetic analysis showed that Chlamydia psittaci isolated from fulmars were closely related to the highly virulent 6BC strains fro...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2020.02.007
更新日期：2020-09-01 00:00:00
abstract：:The bacterium Haemophilus ducreyi causes the sexually transmitted disease chancroid, which is characterized by the appearance of mucocutaneous, persistent ulcers on the external genitals. To identify carbohydrate receptors that mediate the attachment of this pathogen to host cells, we investigated the binding of 35S-m...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.05.009
更新日期：2006-08-01 00:00:00
abstract：:The chemokine receptor CCR6 is expressed on naïve B cells, dendritic cell and T-cell subpopulations and is involved in cell navigation during organogenesis and recruitment in response to inflammatory stimuli. Gene-deficient C57BL/6 CCR6(-/-) mice infected with the protozoan parasite Leishmania (L.) major were able to ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.12.002
更新日期：2007-03-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.06.001
更新日期：2011-11-01 00:00:00
abstract：:Pneumococcal serine-rich repeat protein (PsrP) is a glycoprotein that mediates Streptococcus pneumoniae attachment to lung cells and promotes biofilm formation. Herein, we investigated the transcriptional organization of psrP-secY2A2, the 37-kbp pathogenicity island encoding PsrP and its accessory genes. PCR amplifica...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2017.04.001
更新日期：2017-06-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.02.019
更新日期：2006-06-01 00:00:00
abstract：:Porcine respiratory coronavirus (PRCV) potentiates respiratory disease and proinflammatory cytokine production in the lungs upon intratracheal inoculation with lipopolysaccharide (LPS) at 1 day of infection. This study aimed to quantify LPS-binding protein (LBP), CD14 and haptoglobin in the lungs throughout a PRCV inf...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.01.009
更新日期：2006-05-01 00:00:00
abstract：:The inner ear has been regarded as an immunoprivileged site because of isolation by the blood-labyrinthine barrier. Several reports have indicated the existence of immune cells in the inner ear, but there are no reports showing immunocompetence of the cochlear tissue. In this report, we examined the potential involvem...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2013.04.008
更新日期：2013-07-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2003.10.012
更新日期：2004-02-01 00:00:00
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journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(99)80063-x
更新日期：1999-07-01 00:00:00
abstract：:Francisella tularensis subspecies (subsp.) tularensis is a CDC Category A biological warfare agent and inhalation of as few as 15 bacilli can initiate severe disease. Relatively little is known about the cellular and molecular mechanisms of host defense against respiratory infection with subsp. tularensis. In this stu...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.01.010
更新日期：2011-05-01 00:00:00
abstract：:Although the pathogenesis of periodontal disease (PD) is not well known, cytokines, chemotactic factors and inflammatory cells are certainly involved in the disease outcome. Here, we characterized the evolution of the PD induced by Actinobacillus actinomycetemcomitans in mice, showing that oral inoculation of these ba...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.01.012
更新日期：2005-04-01 00:00:00
abstract：:Monoxenous trypanosomatids usually have an invertebrate as the only host in their life cycles, however, they have been found repeatedly in plants and/or mammals. To succeed in colonizing a vertebrate host, the parasite must quickly adapt to drastic changes in the environment (e.g. temperature), which reflect the condi...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2010.07.010
更新日期：2010-11-01 00:00:00
abstract：:Most pandemic influenza virus strains undergo adaptation or reassortment before they acquire the ability to cause fatal infections in a new host species. The pathologic changes and tissue tropism during virus adaptation are not fully understood. Here we investigated pathologic changes and tissue tropism by serial lung...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.09.013
更新日期：2009-01-01 00:00:00
abstract：:Coxiella burnetii is an intracellular bacterium that causes acute and chronic Q fever. This unique pathogen has been historically challenging to study due to obstacles in genetically manipulating the organism and the inability of small animal models to fully mimic human Q fever. Here, we review the current state of C....
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2019.09.001
更新日期：2020-04-01 00:00:00
abstract：:Lipoarabinomannans (LAMs) from mycobacteria were investigated concerning their effect on human neutrophils. Two types of LAM, the mannose-capped ManLAM from the virulent Mycobacterium tuberculosis H37Rv and the mannose-lacking AraLAM from a rapidly growing mycobacterial strain were used. Neither AraLAM nor ManLAM indu...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(01)01470-8
更新日期：2001-11-01 00:00:00
abstract：:Infection of mice with Plasmodium berghei NK65 represents a well-recognized malaria model in which infection is accompanied by an intense hepatic inflammatory response. Enzyme-inducible nitric oxide synthase is an important regulator of inflammation and leukocyte recruitment in microvessels, but these functions have y...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2013.08.001
更新日期：2013-11-01 00:00:00
abstract：:We have previously reported that mice immunized with the mycobacterial 27-kDa lipoprotein were more susceptible to Mycobacterium tuberculosis (Mtb) challenge. We also showed that 27-kDa lipoprotein abrogated the protection afforded by the BCG vaccine when administrated together, suggesting that the 27-kDa lipoprotein ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.02.011
更新日期：2006-06-01 00:00:00
