Abstract:
:The intracellular pathogen Burkholderia pseudomallei, the etiological agent of melioidosis in humans and various animals, is capable of survival and movement within the cytoplasm of host cells by a process known as actin-based motility. The bacterial factor BimA is required for actin-based motility through its direct interaction with actin, and by mediating actin polymerization at a single pole of the bacterium to promote movement both within and between cells. However, little is known about the other bacterial proteins required for this process. Here, we have investigated the role of the bimC gene (bpss1491) which lies immediately upstream of the bimA gene (bpss1492) on the B. pseudomallei chromosome 2. Conserved amongst all B. pseudomallei, B. mallei and B. thailandensis strains sequenced to date, this gene encodes an iron-binding protein with homology to a group of proteins known as the bacterial autotransporter heptosyltransferase (BAHT) family. We have constructed a B. pseudomallei bimC deletion mutant and demonstrate that it is defective in intracellular survival in HeLa cells, but not in J774.1 macrophage-like cells. The bimC mutant is defective in cell to cell spread as demonstrated by ablation of plaque formation in HeLa cells, and by the inability to form multi-nucleated giant cells in J774.1 cells. These phenotypes in intracellular survival and cell to cell spread are not due to the loss of expression and polar localization of the BimA protein on the surface of intracellular bacteria, however they do correlate with an inability of the bacteria to recruit and polymerize actin. Furthermore, we also establish a role for bimC in virulence of B. pseudomallei using a Galleria mellonella larvae model of infection. Taken together, our findings indicate that B. pseudomallei BimC plays an important role in intracellular behavior and virulence of this emerging pathogen.
journal_name
Front Cell Infect Microbioljournal_title
Frontiers in cellular and infection microbiologyauthors
Srinon V,Chaiwattanarungruengpaisan S,Korbsrisate S,Stevens JMdoi
10.3389/fcimb.2019.00063subject
Has Abstractpub_date
2019-03-22 00:00:00pages
63issn
2235-2988journal_volume
9pub_type
杂志文章abstract::Escherichia coli carrying prophage with genes that encode for Shiga toxins are categorized as Shiga toxin-producing E. coli (STEC) pathotype. Illnesses caused by STEC in humans, which are often foodborne, range from mild to bloody diarrhea with life-threatening complications of renal failure and hemolytic uremic syndr...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.00378
更新日期:2020-07-29 00:00:00
abstract::Hundred-thousands of fungal species are present in our environment, including normal colonizers that constitute part of the human microbiota. The homeostasis of host-fungus interactions encompasses efficient fungal sensing, tolerance at mucosal surfaces, as well as antifungal defenses. Decrease in host immune fitness ...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2012.00142
更新日期:2012-11-22 00:00:00
abstract::Programmed cell death (PCD) can play a crucial role in tuning the immune response to microbial infection. Although PCD can occur in different forms, all are mediated by a family of proteases called caspases. Caspase-2 is the most conserved caspase, however, its function in cell death is ill-defined. Previously we demo...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2013.00083
更新日期:2013-11-27 00:00:00
abstract::The emerging relapsing fever spirochete Borrelia (B.) miyamotoi is transmitted by ixodid ticks and causes the so-called hard tick-borne relapsing fever or B. miyamotoi disease (BMD). More recently, we identified a surface-exposed molecule, CbiA exhibiting complement binding and inhibitory capacity and rendering spiroc...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2018.00023
更新日期:2018-02-02 00:00:00
abstract::Human coronaviruses, which can cause a range of infectious diseases, have been studied for nearly 60 years. The field has gained renewed interest from researchers around the world due to the COVID-19 outbreak in late 2019. Despite a large amount of research, little is known about the knowledge structure and developing...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.581404
更新日期:2020-09-23 00:00:00
abstract::Pediculus humanus is an obligate bloodsucking ectoparasite of human that includes two ecotypes, head louse and body louse, which differ slightly in morphology and biology, but have distinct ecologies. Phylogenetically, they are classified on six mitochondrial clades (A, B, C, D, E, and F), head louse encompasses the f...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2019.00474
更新日期:2020-01-21 00:00:00
abstract::Streptococcus pyogenes is a significant pathogen of humans, annually causing over 700,000,000 infections and 500,000 deaths. Virulence in S. pyogenes is closely linked to mobile genetic elements like phages and chromosomal islands (CI). S. pyogenes phage-like chromosomal islands (SpyCI) confer a complex mutator phenot...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2014.00109
更新日期:2014-08-12 00:00:00
abstract::Postpartum depressive disorder (PPD) is a unique subtype of major depressive disorder and a substantial contributor to maternal morbidity and mortality. However, the pathogenesis of PPD has still remained elusive, and it may associate with genetic and environmental factors. Gut microbiota has already been proved to be...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.567268
更新日期:2020-09-29 00:00:00
abstract::Due to the importance of a rapid determination of patients infected by multidrug resistant bacteria, we evaluated two rapid diagnostic tests for the detection of third-generation cephalosporins (3GC)-resistant Enterobacterales directly from positive blood cultures within 1 h: BL-REDTM (electrochemical method) and β-LA...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.00491
更新日期:2020-09-11 00:00:00
abstract::Enterococcus faecium is a clinically important pathogen associated with opportunistic infection and multi-drug resistance. E. faecium has been shown to produce membrane vesicles (MVs), but MV production by E. faecium under antibiotic stress conditions and the pathogenic traits thereof have yet to be determined. This s...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2019.00295
更新日期:2019-08-14 00:00:00
abstract::To define the bottlenecks that restrict antigen expression after oral administration of viral-vectored vaccines, we tracked vectors derived from the human adenovirus type 5 at whole body, tissue, and cellular scales throughout the digestive tract in a murine model of oral delivery. After intragastric administration of...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2018.00006
更新日期:2018-01-25 00:00:00
abstract::Objectives: The emergence of carbapenem-resistant Enterobacteriaceae, especially Klebsiella pneumoniae, has become a major concern in clinic settings. Combination therapy is gaining momentum to counter the secondary resistance and potential suboptimal efficacy of monotherapy. The aim of this study was to evaluate the ...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2017.00246
更新日期:2017-06-16 00:00:00
abstract::Osteomyelitis is commonly caused by Staphylococcus aureus. Both erythromycin and curcumin can suppress S. aureus growth, but their roles in osteomyelitis are barely studied. We aim to explore the activities of erythromycin and curcumin against chronical osteomyelitis induced by methicillin-resistant S. aureus (MRSA). ...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2017.00379
更新日期:2017-08-24 00:00:00
abstract::Acute pancreatitis (AP) is considered a cascade of immune responses triggered by acinar cell necrosis. AP involves two main processes of systemic inflammatory response syndrome and subsequent compensatory anti-inflammatory response syndrome. Although great efforts have been made regarding AP therapy, the mortality rat...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2020.00128
更新日期:2020-03-31 00:00:00
abstract::Vibrio parahaemolyticus, autochthonous to estuarine, marine, and coastal environments throughout the world, is the causative agent of food-borne gastroenteritis. More than 80 serotypes have been described worldwide, based on antigenic properties of the somatic (O) and capsular (K) antigens. Serovar O3:K6 emerged in In...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2013.00097
更新日期:2013-12-11 00:00:00
abstract::Tularemia is an endemic zoonotic disease in many parts of the world including Asia. A cross-sectional study was conducted to determine genome-based prevalence of Francisella tularensis (Ft) in soil, assess an association between its occurrence in soil and likely predictors i.e., macro and micro-nutrients and several c...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2019.00089
更新日期:2019-04-05 00:00:00
abstract::Enterohemorrhagic Escherichia coli (EHEC) is a significant cause of serious human gastrointestinal disease worldwide. EHEC strains contain a pathogenicity island called the locus of enterocyte effacement (LEE), which encodes virulence factors responsible for damaging the gut mucosa. The Cpx envelope stress response of...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2016.00011
更新日期:2016-02-05 00:00:00
abstract::Myocarditis, inflammation of the heart muscle, affects all demographics and is a major cause of sudden and unexpected death in young people. It is most commonly caused by viral infections of the heart, with coxsackievirus B3 (CVB3) being among the most prevalent pathogens. To understand the molecular pathogenesis of C...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2019.00265
更新日期:2019-07-24 00:00:00
abstract::The SaeRS two-component system plays important roles in regulation of key virulence factors and pathogenicity. In this study, however, we found that the deletion mutation of saeRS enhanced bacterial survival in human blood, whereas complementation of the mutant with SaeRS returned survival to wild-type levels. Moreove...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2017.00204
更新日期:2017-05-29 00:00:00
abstract::Half of invasive fungal infections lead to death. Amongst pathogenic fungi, the most widespread species belong to the Candida genus and vary in their susceptibility to antifungal drugs. The emergence of antifungal resistance has become a major clinical problem. Therefore, the definition of susceptibility patterns is c...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2019.00019
更新日期:2019-02-07 00:00:00
abstract::Caprine parainfluenza virus type 3 (CPIV3) is a newly emerging pathogenic respiratory agent infecting both young and adult goats, and it was identified in eastern China in 2013. Cellular microRNAs (miRNAs) have been reported to be important modulators of the intricate virus-host interactions. In order to elucidate the...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2018.00093
更新日期:2018-03-29 00:00:00
abstract::Preservation of health from infectious diseases depends upon both mucosal and systemic immunity via the collaborative effort of innate and adaptive immune responses. The proficiency of host immunity stems from robust defense mechanisms--physical barriers and specialized immune cells--and a failure of these mechanisms ...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2016.00041
更新日期:2016-04-11 00:00:00
abstract::Streptococcus pneumoniae is a leading cause of bacterial pneumonia worldwide. Given the critical role of dendritic cells (DCs) in regulating and modulating the immune response to pathogens, we investigated here the role of DCs in S. pneumoniae lung infections. Using a well-established transgenic mouse line which allow...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2013.00021
更新日期:2013-06-21 00:00:00
abstract::Culture-independent metagenomic methodologies have enabled detection and identification of microorganisms in various biological systems and often revealed complex and unknown microbiomes. In many organisms, the microbiome outnumbers the host cells and greatly affects the host biology and fitness. Ticks are hematophago...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.00211
更新日期:2020-05-08 00:00:00
abstract::Apicomplexan parasites, such as human malaria parasites, have complex lifecycles encompassing multiple and diverse environmental niches. Invading, replicating, and escaping from different cell types, along with exploiting each intracellular niche, necessitate large and dynamic changes in parasite morphology and cellul...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2020.611801
更新日期:2021-01-08 00:00:00
abstract::Pathogenic species of Leptospira cause leptospirosis, a bacterial zoonotic disease with a global distribution affecting over one million people annually. Reservoir hosts of leptospirosis, including rodents, dogs, and cattle, exhibit little to no signs of disease but shed large numbers of organisms in their urine. Tran...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2017.00362
更新日期:2017-08-09 00:00:00
abstract::Non-encapsulated Streptococcus pneumoniae often possess two genes, aliB-like ORF 1 and aliB-like ORF 2, in place of capsule genes. AliB-like ORF 1 is thought to encode a substrate binding protein of an ABC transporter which binds peptide SETTFGRDFN, found in 50S ribosomal subunit protein L4 of Enterobacteriaceae. Here...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2019.00320
更新日期:2019-09-10 00:00:00
abstract::Iron is the most abundant transition metal in the human body and its bioavailability is stringently controlled. In particular, iron is tightly bound to host proteins such as transferrin to maintain homeostasis, to limit potential damage caused by iron toxicity under physiological conditions and to restrict access by p...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2013.00080
更新日期:2013-11-19 00:00:00
abstract::Metagenomic approaches applied to viruses have highlighted their prevalence in almost all microbial ecosystems investigated. In all ecosystems, notably those associated with humans or animals, the viral fraction is dominated by bacteriophages. Whether they contribute to dysbiosis, i.e., the departure from microbiota c...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章,评审
doi:10.3389/fcimb.2014.00039
更新日期:2014-03-28 00:00:00
abstract::Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis (TB), which leads to an estimated 1. 5 million deaths worldwide each year. Although the immune correlates of protection against Mtb infection and TB disease have not been well-defined, natural killer (NK) cells are increasingly recognized as a key...
journal_title:Frontiers in cellular and infection microbiology
pub_type: 杂志文章
doi:10.3389/fcimb.2020.00120
更新日期:2020-03-24 00:00:00