Abstract:
BACKGROUND:The role of Aspergillus fumigatus mycotoxins in the colonization of the respiratory tract by conidia has not been studied extensively, even though patients at risk from invasive aspergillosis frequently exhibit respiratory epithelium damage. In a previous study, we found that filtrates of A. fumigatus cultures can specifically alter the electrophysiological properties of human nasal epithelial cells (HNEC) compared to those of non pathogenic moulds. RESULTS:We fractionated the organic phase of filtrate from 3-day old A. fumigatus cultures using high-performance liquid chromatography. The different fractions were tested for their ability to modify the electrophysiological properties of HNEC in an in vitro primary culture model. The fraction collected between 20 and 30 min mimicked the effects of the whole filtrate, i.e. decrease of transepithelial resistance and increase of potential differences, and contained secondary metabolites such as helvolic acid, fumagillin, and verruculogen. Only verruculogen (10(-8) M) had effects similar to the whole filtrate. We verified that verruculogen was produced by a collection of 67 human, animal, plant and environmental A. fumigatus isolates. Using MS-MS analysis, we found that verruculogen was associated with both mycelium and conidia extracts. CONCLUSION:Verruculogen is a secondary metabolite that modifies the electrophysiological properties of HNEC. The role of these modifications in the colonization and invasion of the respiratory epithelium by A. fumigatus on first contact with the epithelium remains to be determined.
journal_name
BMC Microbioljournal_title
BMC microbiologyauthors
Khoufache K,Puel O,Loiseau N,Delaforge M,Rivollet D,Coste A,Cordonnier C,Escudier E,Botterel F,Bretagne Sdoi
10.1186/1471-2180-7-5subject
Has Abstractpub_date
2007-01-23 00:00:00pages
5issn
1471-2180pii
1471-2180-7-5journal_volume
7pub_type
杂志文章相关文献
BMC MICROBIOLOGY文献大全abstract:BACKGROUND:Antimicrobial helper-compounds may reverse antimicrobial resistance. Sertraline, a antidepressant drug, has been suggested as a tetracycline helper-compound. Tetracycline is the preferred antimicrobial for treatment of enteric diseases in pigs. This study is the first to evaluate the potency of sertraline as...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-018-1383-5
更新日期:2019-01-11 00:00:00
abstract:BACKGROUND:The taxonomy of tintinnine ciliates is vastly unresolved because it has traditionally been based on the lorica (a secreted shell) and it has only recently incorporated cytological and molecular information. Tintinnopsis, the most speciose tintinnine genus, is also the most problematic: it is known to be non-...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-020-02057-2
更新日期:2020-12-14 00:00:00
abstract:BACKGROUND:Fungi are the second most abundant type of human pathogens. Invasive fungal pathogens are leading causes of life-threatening infections in clinical settings. Toxicity to the host and drug-resistance are two major deleterious issues associated with existing antifungal agents. Increasing a host's tolerance and...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-13-224
更新日期:2013-10-07 00:00:00
abstract:BACKGROUND:Affecting the core functional microbiome, peculiar high level taxonomic unbalances of the human intestinal microbiota have been recently associated with specific diseases, such as obesity, inflammatory bowel diseases, and intestinal inflammation. RESULTS:In order to specifically monitor microbiota unbalance...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-10-116
更新日期:2010-04-19 00:00:00
abstract:BACKGROUND:adhC from Haemophilus influenzae encodes a glutathione-dependent alcohol dehydrogenase that has previously been shown to be required for protection against killing by S-nitrosoglutathione (GSNO). This group of enzymes is known in other systems to be able to utilize substrates that form adducts with glutathio...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-12-159
更新日期:2012-07-31 00:00:00
abstract:BACKGROUND:Bacteria excrete costly toxins to defend their ecological niche. The evolution of such antagonistic interactions between individuals is expected to depend on both the social environment and the strength of resource competition. Antagonism is expected to be weak among highly similar genotypes because most ind...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-12-40
更新日期:2012-03-22 00:00:00
abstract:BACKGROUND:Glycopeptidolipids (GPLs) are among the major free glycolipid components of the outer membrane of several saprophytic and clinically-relevant Mycobacterium species. The architecture of GPLs is based on a constant tripeptide-amino alcohol core of nonribosomal peptide synthetase origin that is N-acylated with ...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-12-118
更新日期:2012-06-22 00:00:00
abstract:BACKGROUND:Pneumococcus is exposed to a variety of temperature and oxygen levels in the upper respiratory tract and as it invades the lung, tissues, and blood. We sought to determine the effect of environmental variability on growth in vitro and to assess variability between strains. We evaluated the effect of temperat...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-019-1671-8
更新日期:2019-12-26 00:00:00
abstract:BACKGROUND:Tsetse flies (Diptera: Glossinidae) are solely responsible for the transmission of African trypanosomes, causative agents of sleeping sickness in humans and nagana in livestock. Due to the lack of efficient vaccines and the emergence of drug resistance, vector control approaches such as the sterile insect te...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-018-1295-4
更新日期:2018-11-23 00:00:00
abstract:BACKGROUND:We performed a 12-month cohort study of the stability and resilience of the intestinal microbiota of healthy children in daycare in Denmark in relation to diarrheal events and exposure to known risk factors for gastrointestinal health such as travelling and antibiotic use. In addition, we analyzed how gut mi...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-018-1367-5
更新日期:2018-12-22 00:00:00
abstract:BACKGROUND:Enterobacterial common antigen (ECA) is a family-specific surface antigen shared by all members of the Enterobacteriaceae family. Previous studies showed that the loss of ECA results in Salmonella attenuation, indicating its usefulness as a vaccine candidate for Salmonella infection, but no studies have show...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-020-01837-0
更新日期:2020-06-08 00:00:00
abstract:BACKGROUND:Flavobacterium columnare (Bacteroidetes) is the causative agent of columnaris disease in farmed freshwater fish around the world. The bacterium forms three colony morphotypes (Rhizoid, Rough and Soft), but the differences of the morphotypes are poorly known. We studied the virulence of the morphotypes produc...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-14-170
更新日期:2014-06-26 00:00:00
abstract:BACKGROUND:Streptococcus pneumoniae is a common respiratory pathogen and a major causative agent of respiratory infections, including otitis media (OM). Pneumococcal biofilms have been demonstrated on biopsies of the middle ear mucosa in children receiving tympanostomy tubes, supporting the hypothesis that chronic OM m...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-8-173
更新日期:2008-10-08 00:00:00
abstract:BACKGROUND:The resurgence of multi-drug resistant tuberculosis (MDR-TB) and HIV associated tuberculosis (TB) are of serious global concern. To contain this situation, new anti-tuberculosis drugs and reduced treatment regimens are imperative. Recently, a nitroimidazole, PA-824, has been shown to be active against both r...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-13-218
更新日期:2013-10-01 00:00:00
abstract:BACKGROUND:Since 1994, Brucella strains have been isolated from a wide range of marine mammals. They are currently recognized as two new Brucella species, B. pinnipedialis for the pinniped isolates and B. ceti for the cetacean isolates in agreement with host preference and specific phenotypic and molecular markers. In ...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-9-145
更新日期:2009-07-20 00:00:00
abstract:BACKGROUND:Bordetella dermonecrotic toxin (DNT) causes the turbinate atrophy in swine atrophic rhinitis, caused by a Bordetella bronchiseptica infection of pigs, by inhibiting osteoblastic differentiation. The toxin is not actively secreted from the bacteria, and is presumed to be present in only small amounts in infec...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-10-247
更新日期:2010-09-25 00:00:00
abstract:BACKGROUND:The infections caused by antibiotic multidrug-resistant bacteria seriously threaten human health. To prevent and cure the infections caused by multidrug-resistant bacteria, new antimicrobial agents are required. Antimicrobial peptides are ideal therapy candidates for antibiotic-resistant pathogens. However, ...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-015-0389-5
更新日期:2015-03-03 00:00:00
abstract:BACKGROUND:Vibrio anguillarum is an extracellular bacterial pathogen that is a causative agent of vibriosis in finfish and crustaceans with mortality rates ranging from 30% to 100%. Mutations in central metabolism (glycolysis and the TCA cycle) of intracellular pathogens often result in attenuated virulence due to depl...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-017-1124-1
更新日期:2017-11-14 00:00:00
abstract:BACKGROUND:The purpose of this study was to design and evaluate fluorescent in situ hybridization (FISH) probes for the single-cell detection and enumeration of lactic acid bacteria, in particular organisms belonging to the major phylogenetic groups and species of oral lactobacilli and to Abiotrophia/Granulicatella. R...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-11-14
更新日期:2011-01-19 00:00:00
abstract:BACKGROUND:Aspergillus fumigatus is a ubiquitous saprotrophic fungus and an opportunistic pathogen of humans and animals. Humans and animals can inhale hundreds of A. fumigatus spores daily. Normally this is harmless for humans, but in case of immunodeficiency, invasive pulmonary aspergillosis (IPA) can develop with a ...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-018-1244-2
更新日期:2018-09-17 00:00:00
abstract:BACKGROUND:Xanthophyllomyces dendrorhous is a basidiomycetous yeast that synthesizes astaxanthin, a carotenoid with great biotechnological impact. The ergosterol and carotenoid synthetic pathways derive from the mevalonate pathway and involve cytochrome P450 enzymes. Among these enzymes, the CYP51 family, which is invo...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-015-0428-2
更新日期:2015-04-25 00:00:00
abstract:BACKGROUND:The genus Brucella contains highly infectious species that are classified as biological threat agents. The timely detection and identification of the microorganism involved is essential for an effective response not only to biological warfare attacks but also to natural outbreaks. Matrix-assisted laser desor...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-11-267
更新日期:2011-12-23 00:00:00
abstract:BACKGROUND:Vibrio cholerae is the causative agent of cholera. Extensive studies reveal that complicated regulatory cascades regulate expression of virulence genes, the products of which are required for V. cholerae to colonize and cause disease. In this study, we investigated the expression of the key virulence regulat...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-10-3
更新日期:2010-01-06 00:00:00
abstract:BACKGROUND:The RNA interference (RNAi) pathway acts as an innate antiviral immune response in Aedes aegypti, modulating arbovirus infection of mosquitoes. Sindbis virus (SINV; family: Togaviridae, genus: Alphavirus) is an arbovirus that infects Ae. aegypti in the laboratory. SINV strain TR339 encounters a midgut escape...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-10-130
更新日期:2010-04-28 00:00:00
abstract:BACKGROUND:FliH is a protein involved in the export of components of the bacterial flagellum and we herein describe the presence of glycine-rich repeats in FliH of the form AxxxG(xxxG)mxxxA, where the value of m varies considerably in FliH proteins from different bacteria. While GxxxG and AxxxA patterns have previously...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-9-72
更新日期:2009-04-16 00:00:00
abstract:BACKGROUND:Brucellosis is an important zoonosis caused by the genus Brucella. In addition Brucella represents potential biological warfare agents due to the high contagious rates for humans and animals. Therefore, the strain typing epidemiological tool may be crucial for tracing back source of infection in outbreaks an...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-9-66
更新日期:2009-04-07 00:00:00
abstract:BACKGROUND:Fusobacterium nucleatum, a well studied bacterium in periodontal diseases, appendicitis, gingivitis, osteomyelitis and pregnancy complications has recently gained attention due to its association with colorectal cancer (CRC) progression. Treatment with berberine was shown to reverse F. nucleatum-induced CRC ...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-016-0700-0
更新日期:2016-05-12 00:00:00
abstract:BACKGROUND:Non typhoidal salmonellosis is one of the neglected zoonoses in most African countries. The use of sub-therapeutic doses of antibiotics as animal growth promoter enhances the emergence and dissemination of antimicrobial resistance in bacteria with food animal reservoirs and may also results in antibiotics re...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-018-1248-y
更新日期:2018-08-30 00:00:00
abstract:BACKGROUND:The aminoglycoside antibiotic gentamicin was supposed to induce a crosstalk between the Cpx- and the Arc-two-component systems (TCS). Here, we investigated the physical interaction of the respective TCS components and compared the results with their respective gene expression and protein abundance. The findi...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/s12866-017-1100-9
更新日期:2017-09-18 00:00:00
abstract:BACKGROUND:Listeria monocytogenes has been implicated in several food borne outbreaks as well as sporadic cases of disease. Increased understanding of the biology of this organism is important in the prevention of food borne listeriosis. The infectivity of Listeria monocytogenes ScottA, cultivated with and without oxyg...
journal_title:BMC microbiology
pub_type: 杂志文章
doi:10.1186/1471-2180-7-55
更新日期:2007-06-14 00:00:00