Abstract:
:The closely related Shiga toxins, Shiga toxin 1 (Stx1) and Shiga toxin 2 (Stx2), can bind to Gb3 receptors. However, Stx2-producing enterohemorrhagic Escherichia coli (EHEC) strains are more commonly associated with serious human disease (viz., hemolytic-uremic syndrome) than Stx1-producing strains. To clarify the relationship between properties and toxicity of these toxins, we constructed and analyzed a hybrid holotoxin composed of Stx2A and Stx1B, designated as Stx2A1B, and a B subunit chimeric holotoxin composed of Stx2A and Stx2B (III V), designated as Stx2A2B (III V). The affinity of Stx2A1B to Gb3 was lower than that of Stx1, higher than that of Stx2 and identical to that of Stx2A2B (III V). On the other hand, the 50% lethal dose (LD(50)) for mice of Stx2A1B was lower than that of Stx1, but higher than that of Stx2. These results suggested that pathogenicity in mice was inversely related to the receptor affinity of the holotoxins. However, LD(50) of Stx2A1B was not identical to that of Stx2A2B (III V). Gel filtration analysis indicated that Stx2A2B (III V) was relatively less stable than Stx2A1B. Moreover, cross-linking experiments demonstrated that the modes of cell surface binding of Stx2A2B (III V) and Stx2A1B were different. These results indicated that the receptor affinity, stability and binding mode of Shiga toxins might be important determinants for toxicity in mice.
journal_name
Microb Pathogjournal_title
Microbial pathogenesisauthors
Shimizu T,Sato T,Kawakami S,Ohta T,Noda M,Hamabata Tdoi
10.1016/j.micpath.2007.04.003subject
Has Abstractpub_date
2007-08-01 00:00:00pages
88-95issue
2-3eissn
0882-4010issn
1096-1208pii
S0882-4010(07)00048-4journal_volume
43pub_type
杂志文章abstract::Synthesis of highly efficient antibacterial agents has become highly important due to emergence of antibiotic resistance. Herein, Pristine ZnO and ZnO-CuO nanocomposite has been synthesized by simple chemical co-precipitation method and characterized by X-ray diffraction (XRD), microscopic and spectroscopic techniques...
journal_title:Microbial pathogenesis
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doi:10.1016/j.micpath.2019.103579
更新日期:2019-09-01 00:00:00
abstract::The transferrin-binding proteins TbpA and TbpB from Pasteurella haemolytica biotype A serotype 1 were tested for their ability to confer protection against experimental P. haemolytica infection when administered to calves in vaccine formulations containing one or both antigens. Vaccine groups included TbpB (single imm...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1999.0297
更新日期:1999-10-01 00:00:00
abstract::Acinetobacter nosocomialis is an important nosocomial pathogen that causes a variety of opportunistic infections; however, pathogenesis of this microorganism has not yet been characterized. The aim of this study was to investigate the secretion of outer membrane vesicles (OMVs) from A. nosocomialis and to determine th...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2015.03.012
更新日期:2015-04-01 00:00:00
abstract::Programmed cell death is part of normal development and homeostasis. Apoptosis induced by bacteria appears to contribute to infectious diseases. Some bacteria produce toxins to kill host cells by the same pathway, apoptosis, through different mechanisms including pore formation, protein synthesis inhibition or adenyla...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1006/mpat.1994.1066
更新日期:1994-10-01 00:00:00
abstract::A novel N-acyl substituted indole-linked benzimidazoles and naphthoimidazoles were synthesized. Their chemical structures were confirmed using spectroscopic tools including 1H NMR, 13C NMR and CHN-elemental analyses. Anti inflammatory activity for all target compounds was evaluated in-vitro. The synthesized compounds ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.12.021
更新日期:2018-01-01 00:00:00
abstract::In vivo studies are crucial decision-maker step in order to translate in vitro data to an applied therapy. Considering this we describe a simple method that analyzes and quantifies biofilm formation inside the Galleria mellonella larvae. Toothbrush bristles were employed as an abiotic surface to mimic a medical device...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103756
更新日期:2019-12-01 00:00:00
abstract::Interleukin-10 (IL-10) is an anti-inflammatory cytokine associated with the inhibition of HIV replication. IL-10 polymorphisms were found to be linked to drug-induced hepatotoxicity. Hence we examined the prevalence of IL-10 (-819C/T,-1082A/G) polymorphisms in a total of 165 HIV patients which included 34 patients wit...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103544
更新日期:2019-08-01 00:00:00
abstract::Interleukin-8 (IL-8) is a neutrophil and T-lymphocyte chemotactic and activating factor. This cytokine is produced by many cell types including macrophages in response to a variety of microbial and non-microbial agents. In the present study, we determined the nucleotide sequence for bovine IL-8 cDNA. The amino acid se...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1996.0019
更新日期:1996-04-01 00:00:00
abstract:BACKGROUND:Obesity is associated with alteration of the gut microbiota. In order to clarify the effect of Lactobacillus-containing probiotics (LCP) on weight we performed a meta-analysis of clinical studies and experimental models. We intended to assess effects by Lactobacillus species. METHODS:A broad search with no ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,meta分析
doi:10.1016/j.micpath.2012.05.007
更新日期:2012-08-01 00:00:00
abstract:AIMS:The main objective of the present study was to assess and compare the safety and inhibitory efficacy of Lactobacillus acidophilus against cholera toxin and shigatoxin production by measuring CTX-B and Stx1 expression level in Caco-2 cells exposed to Vibrio cholerae (as a non-invasive small intestine pathogens and ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104543
更新日期:2020-12-01 00:00:00
abstract::A virus inhibitor found in gastric secretions and in extracts from gastrointestinal tissues is described. The inhibitor shares a number of characteristics with the recently described contact-blocking virus inhibitor (CVI), which is produced by unstimulated cells in culture, and occurs naturally in some body fluids. Th...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(86)90048-3
更新日期:1986-06-01 00:00:00
abstract::C1q, as a LAIR-1 ligand, maintains monocytes quiescence and possess immunosuppressive properties. To understand the roles and molecular mechanisms, C1q mediated inflammation cytokines and several pivotal proteins in THP-1 cells after H. pylori infection were detected. The results showed that the expression of IL-8, IL...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.04.017
更新日期:2019-06-01 00:00:00
abstract::Multidrug-resistant (MDR) pathogens are currently causing serious problems globally in the medical setting. Improper and extensive usage of antibiotics results in a selective pressure supporting the rise of antibiotic-resistant microbes. Many key cellular bacterial components, including enzymes and small noncoding RNA...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2018.01.043
更新日期:2018-03-01 00:00:00
abstract::The clinical course of infection with Mycobacterium leprae varies widely and depends on the pattern of the host immune response. Dendritic cells play an important role in the activation of the innate and adaptive immune system and seem to be essential for the development of the disease. To analyze the presence of epid...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2015.11.013
更新日期:2016-02-01 00:00:00
abstract::Infections with the obligate intracellular bacterium Chlamydia trachomatis are characterized by avoidance of fusion between chlamydia-containing endosomes and lysosomes, bacterial persistence and development of post-infectious sequelae. In this report we show that C. trachomatis induces apoptosis in McCoy and HeLa cel...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.2001.0460
更新日期:2001-10-01 00:00:00
abstract::Resistance to antimicrobials is a challenging issue that complicates the treatment of infections caused by bacteria and fungi, thus requiring new therapeutic options. Oncocalyxone A, a benzoquinone obtained from Auxemma oncocalyx (Allem) Taub has several biological effects; however, there is no data on its antimicrobi...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104513
更新日期:2020-12-01 00:00:00
abstract:INTRODUCTION:Tuberculosis (TB) is considered as a serious complication of organ transplant; therefore, the detection and appropriate treatment of active TB infection is highly recommended for the reduction of mortality in the future. The aim of this review was to conduct a systematic review and meta-analysis assessing ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,meta分析
doi:10.1016/j.micpath.2019.103894
更新日期:2020-02-01 00:00:00
abstract::Catheter associated urinary tract infection (CAUTI) is a highly prevalent hospital-acquired infection that is predominantly caused by uropathogenic Escherichia coli (UPEC). It adheres on catheter surface using type I pili as the initial step of pathogenesis that progresses to form biofilm. In this study, potential inh...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103772
更新日期:2020-01-01 00:00:00
abstract::Bacillus halotolerans is a rhizobacterium with the potential to promote plant growth and tolerance to drought and salinity stress. Here, we present the complete genome sequence of B. halotolerans ZB201702, which consists of 4,150,000 bp in a linear chromosome, including 3074 protein-coding sequences, 30 rRNAs, and 85 ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2018.07.019
更新日期:2018-10-01 00:00:00
abstract::A diarrheal isolate SSU of Aeromonas hydrophila produces a cytotoxic enterotoxin (Act) with cytotoxic, enterotoxic, and hemolytic activities. Our laboratory has characterized from the above Aeromonas strain, in addition to Act, the type 3- and T6-secretion systems and their effectors, as well as the genes shown to mod...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2008.08.007
更新日期:2008-11-01 00:00:00
abstract::Considered to be a potential "superbug", methicillin-resistant Staphylococcus aureus (MRSA) has been one of the major recent infectious pathogens and thus poses a challenge to hospital infection control. The mobile genetic element staphylococcal chromosomal cassette mec (SCCmec) carries both the mecA or mecC gene, enc...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2016.10.028
更新日期:2016-12-01 00:00:00
abstract::Brucellosis is a worldwide zoonotic infectious disease that has significant economic effects on animal production and human health. The host macrophage -Brucella interaction is critical to the establishment of infections. Thus, the kinetic transcriptional profile of gene expression in macrophages infected with the Bru...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2012.02.001
更新日期:2012-05-01 00:00:00
abstract:OBJECTIVE:Prompt genotyping of Mycobacterium tuberculosis (M. tuberculosis) is crucial for improving molecular epidemiological investigation of tuberculosis (TB). METHODS:We performed a retrospective study to evaluate the use of 24 loci MIRU-VNTR (mycobacterial interspersed repetitive unit-variable number of tandem-re...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2016.12.025
更新日期:2017-02-01 00:00:00
abstract::Recognised as the leading cause of nosocomial antibiotic-associated diarrhoea, the incidence of Clostridium difficile infection (CDI) remains high despite efforts to improve prevention and reduce the spread of the bacterium in healthcare settings. In the last decade, many studies have focused on the epidemiology and r...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2016.05.018
更新日期:2016-08-01 00:00:00
abstract::Photobacterium damselae subsp. damselae has been known as an opportunistic pathogen in fish and mammals. Human infectious cases are often very serious and occasionally fatal. We previously reportedtwo fatal cases caused by this subspecies where the patients developed multiple organ failure within 20-36 h after the ons...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2008.04.008
更新日期:2008-08-01 00:00:00
abstract::We report the study of a predicted outer-membrane leptospiral protein encoded by the gene lic11207. This protein is conserved in several pathogenic leptospiral strains but is absent in the saprophyte Leptospira biflexa. This putative outer-membrane protein has a domain of unknown function (DUF) 1565 found in several p...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2012.10.002
更新日期:2013-03-01 00:00:00
abstract::In Salmonella enterica serovar Typhimurium, MgtC and PagC are positively regulated by the PhoP-PhoQ two-component system, which is activated under magnesium deprivation. Both MgtC and PagC are of unknown function but have been involved in intramacrophage survival. We have found that the amount of PagC is lowered in a ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2008.06.001
更新日期:2008-09-01 00:00:00
abstract::Group G streptococci have on their surface antiphagocytic M protein-like antigens. To determine if these organisms have genes similar to the M protein genes of Streptococcus pyogenes (group A), DNA from independent group G isolates of human and animal origin were tested for homology to probes representing sequences en...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(87)90004-0
更新日期:1987-11-01 00:00:00
abstract::A common feature of many chlamydial infections is that they are often asymptomatic and may persist for long periods of time if left untreated. In addition to the well recognized lytic stage of the chlamydial developmental cycle, evidence is now emerging to support a persistent phase in the cycle in which the reticulat...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.2000.0435
更新日期:2001-06-01 00:00:00
abstract::Essential oils and their chemical constituents have been reported with well documented antimicrobial effects against a range of bacterial, fungal and viral pathogens. By definition, essential oils are a complex mixture of volatile organic compounds which are synthesized naturally in different parts of the plant as par...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2020.104620
更新日期:2020-11-16 00:00:00