Abstract:
:Virulence of the fungal pathogen Aspergillus fumigatus is in part based on the saprophytic lifestyle that this mold has evolved. A crucial function for saprophytism resides in secreted proteases that allow assimilation of proteinaceous substrates. The impact of extracellular proteolytic activities on the pathogenesis of aspergillosis, however, remains controversial. In order to address this issue, characterization of a conserved regulatory factor, PrtT, that acts on expression of secreted proteases was pursued. Expression of PrtT appears to be regulated posttranscriptionally, and the existence of an mRNA leader sequence implies translational control via eIF2alpha kinase signaling. Phenotypic classification of a prtTDelta deletion mutant revealed that expression of several major extracellular proteases is PrtT dependent, resulting in the inability to utilize protein as a nutritional source. Certain genes encoding secreted proteases are not regulated by PrtT. Most strikingly, the deletant strain is not attenuated in virulence when tested in a leukopenic mouse model, which makes a strong case for reconsidering any impact of secreted proteases in pulmonary aspergillosis.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Bergmann A,Hartmann T,Cairns T,Bignell EM,Krappmann Sdoi
10.1128/IAI.00425-09subject
Has Abstractpub_date
2009-09-01 00:00:00pages
4041-50issue
9eissn
0019-9567issn
1098-5522pii
IAI.00425-09journal_volume
77pub_type
杂志文章abstract::Lipopolysaccharide (LPS) binding protein (LBP) is an acute-phase protein that enhances the responsiveness of immune cells to LPS by virtue of its capacity to transfer LPS to CD14. To determine the role of LBP in the innate immune response to peritonitis, LBP gene-deficient (LBP(-/-)) and normal wild-type mice were int...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.71.12.6747-6753.2003
更新日期:2003-12-01 00:00:00
abstract::Fasciola hepatica is a prevalent helminth parasite of livestock. Infection results in polarization of the host's immune response and generation of type 2 helper (Th2) immune responses, which are known to be inhibitory to Th1 responses. Bovine tuberculosis (BTB) is a bacterial disease of economic and zoonotic importanc...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01445-06
更新日期:2007-03-01 00:00:00
abstract::The response to reinfection with Ethiopian Leishmania donovani was evaluated in genetically determined noncure (H-2d) B10.D2 mice that are able to resolve infection due to sublethal irradiation pretreatment after inoculation with a low parasite dose and in C57BL/10 mice that demonstrate the genetically determined cure...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.9.2892-2899.1989
更新日期:1989-09-01 00:00:00
abstract::A chemically defined medium developed for Neisseria gonorrhoeae was modified to support the growth of Campylobacter jejuni and Campylobacter coli. A total of 76 isolates of C. jejuni and 14 isolates of C. coli were tested on this medium, which was designated Campylobacter defined medium (CDM), over a 3-month period. A...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.48.2.384-388.1985
更新日期:1985-05-01 00:00:00
abstract::Bacillary angiomatosis (BA), one of the many clinical manifestations resulting from infection with the facultative intracellular bacterium Bartonella henselae, is characterized by angiogenic lesions. Macrophages have been identified as important effector cells contributing to the angiogenic process during B. henselae ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.9.5735-5742.2005
更新日期:2005-09-01 00:00:00
abstract::A large body of evidence has convincingly shown that Toll-like receptors are necessary sensors for infections with pathogens, but their activation was also suggested to generate autoimmunity. During experimental infections, the lack of these sensors or of their signaling molecules should lead to a deficient immune res...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00951-07
更新日期:2008-04-01 00:00:00
abstract::Antisera against isolated cell surface preparations (PCSP-As) of Leishmania donovani promastigotes were used to detect extracellular antigens produced during the growth of these organisms in four different growth media. The PCSP-As precipitated two major antigenically identical but electrophoretically distinct compone...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.37.2.558-567.1982
更新日期:1982-08-01 00:00:00
abstract::Haemophilus somnus causes pneumonia, reproductive failure, infectious myocarditis, thrombotic meningoencephalitis, and other diseases in cattle. Although vasculitis is commonly seen as a result of systemic H. somnus infections, the pathogenesis of vascular damage is poorly characterized. In this study, we demonstrated...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.3.1650-1660.2001
更新日期:2001-03-01 00:00:00
abstract::Previous studies have suggested that the Pseudomonas aeruginosa PAK pilus adhesin moiety resides in an epithelial cell-binding domain located in the C-terminal region of the PAK pilin structural protein. Synthetic peptides Ac17red (a synthetic peptide with a sequence identical to that of PAK pilin residues 128 to 144,...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.12.3720-3726.1989
更新日期:1989-12-01 00:00:00
abstract::Localized juvenile periodontitis (LJP) runs in families, and a predisposition to develop disease appears to be inherited in an autosomal dominant fashion. Patients with LJP have elevated levels of serum immunoglobulin G2 (IgG2), and this is most striking in black LJP patients. We hypothesized that the markedly elevate...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.64.6.2004-2009.1996
更新日期:1996-06-01 00:00:00
abstract::Insertional inactivation of the Streptococcus mutans spaP gene was used to construct an isogenic mutant (834) of strain NG8 (serotype c) which lacked the major cell surface-associated protein referred to as P1 (15). Results of several studies suggest that P1 is involved in the adherence of S. mutans to saliva-coated a...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.59.12.4606-4609.1991
更新日期:1991-12-01 00:00:00
abstract::Culture filtrate from Mycobacterium tuberculosis contains protective antigens of relevance for the generation of a new antituberculosis vaccine. We have identified two previously uncharacterized M. tuberculosis proteins (TB7.3 and TB10.4) from the highly active low-mass fraction of culture filtrate. The molecules were...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.68.1.214-220.2000
更新日期:2000-01-01 00:00:00
abstract::The fibronectin-degrading ability of 116, mainly oral, strains was assayed by using plasma-derived fibronectin adsorbed to a polystyrene surface. Ability to degrade fibronectin was revealed in strains of Bacteroides gingivalis, Bacteroides intermedius, Bacteroides loeschii, Staphylococcus aureus, Staphylococcus epider...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.51.2.707-711.1986
更新日期:1986-02-01 00:00:00
abstract::The T-cell-stimulating activity of staphylococcal enterotoxin B (SEB) is an important factor in the pathogenesis of certain staphylococcal diseases. To investigate the immunologically active domains of the SEB molecule, we have produced truncated fragments of recombinant SEB by C-terminal and N-terminal deletions. The...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.61.6.2445-2452.1993
更新日期:1993-06-01 00:00:00
abstract::Genomic DNA fingerprint analysis was performed on 39 Staphylococcus aureus and 28 Enterococcus faecalis endophthalmitis isolates collected from multiple clinical centers. Among 21 S. aureus genomic DNA fingerprint patterns identified, five clonotypes were recovered from multiple unrelated patients and accounted for 58...
journal_title:Infection and immunity
pub_type: 杂志文章,多中心研究
doi:10.1128/IAI.66.1.356-360.1998
更新日期:1998-01-01 00:00:00
abstract::Macrophage recognition of Salmonella enterica serovar Typhimurium leads to a cascade of signaling events, including the activation of Src family and Syk kinases and the production of reactive oxygen species (ROS), which are critical for host innate defense during early stages of bacterial infection. ROS production dep...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00115-08
更新日期:2008-06-01 00:00:00
abstract::Kinetic, microscopic, and biochemical studies show that virulent Ti (tumor inducing)-plasmid-containing strains of Agrobacterium attach to normal tobacco and carrot tissue culture cells. Kinetic studies showed that virulent strains of A. tumefaciens attach to the plant tissue culture cells in increasing numbers during...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.22.2.516-522.1978
更新日期:1978-11-01 00:00:00
abstract::T cell-independent antibody responses develop rapidly, within 3 to 4 days, and are critical for preventing blood-borne pathogens from evolving into life-threatening infections. The interaction of BAFF, also known as BLyS, with its receptors BAFFR and TACI on B cells is critical for B cell homeostasis and function. Usi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01147-13
更新日期:2014-01-01 00:00:00
abstract::Campylobacter jejuni is a major cause of human inflammatory enteritis. During the course of human disease numerous proinflammatory cytokines are produced. Little is known, however, about the cytokine responses produced during the interaction of this bacterium with the avian host. Campylobacter has been considered a co...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.4.2094-2100.2005
更新日期:2005-04-01 00:00:00
abstract::Bacterial lipopolysaccharide (LPS) is a potent stimulus of cells, yet a target protein for LPS has not been defined. We used two approaches to define LPS-binding sites on cell surfaces: one assay measured binding of LPS-coated erythrocytes (ELPS) to cultured human cells, and a second measured binding of a radiolabeled...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.58.12.4069-4075.1990
更新日期:1990-12-01 00:00:00
abstract::The response of ferrets after intranasal inoculation of inactivated A/Hong Kong/68 (H3N2) influenza virus vaccines is reported. Normal ferrets given either saline vaccine in drops or freeze-dried vaccine in an aerosol intranasally did not produce detectable serum or nasal hemagglutination inhibiting antibody and were ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.9.6.985-990.1974
更新日期:1974-06-01 00:00:00
abstract::The role of CD4+ and CD8+ T cells in the response to intranasal infection with a Mycobacterium avium complex isolate (MAC) was investigated. Depletion of CD4+ T cells by injected antibody exacerbated infection in the lung, spleen, and liver. There were decreased numbers of inflammatory cells in the lungs of CD4-deplet...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.63.6.2282-2287.1995
更新日期:1995-06-01 00:00:00
abstract::Three parameters of rotavirus infection, i.e., clinical disease, viral antigen in infected intestines, and infectious virus in feces, were assessed in infant mice nursed by mothers with or without preexisting rotavirus antibody. Diarrhea was the only consistent sign of clinical disease, and its course followed that of...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.38.2.755-763.1982
更新日期:1982-11-01 00:00:00
abstract::Monoclonal antibodies (MAbs) were raised against native and denatured alpha-hemolysin (HlyA) of Escherichia coli. Binding of the MAbs to native, denatured, and erythrocyte-complexed active wild-type hemolysin and mutant derivatives was tested. All 15 MAbs analyzed bound to native hemolysin, even when the toxin was com...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.59.5.1846-1852.1991
更新日期:1991-05-01 00:00:00
abstract::Disruption of neutrophils causes the release of a cytoplasmic protein which can inhibit the growth of Candida albicans without killing the organisms. The present study was undertaken with a combined system in which candidacidal and candidastatic activities of human neutrophils could be compared. In this system it was ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.58.8.2696-2698.1990
更新日期:1990-08-01 00:00:00
abstract::To determine the protective efficacy of human hyperimmune globulin to Haemophilus influenzae type b disease in an infant rat model, we compared hyperimmune globulin containing 600 mug of anti-polyribophosphate (PRP) antibody per ml to conventional immune globulin containing 66 mug of anti-PRP antibody per ml. The hype...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.39.2.709-714.1983
更新日期:1983-02-01 00:00:00
abstract::Previous studies have demonstrated that both Ixodes scapularis saliva and Borrelia burgdorferi antigens modulated lymphokines and monokines in vitro. The studies presented here were designed to delineate the role of I. scapularis and B. burgdorferi in modulation of the host immune response in vivo. Infestation of C3H/...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.65.8.3100-3106.1997
更新日期:1997-08-01 00:00:00
abstract::Experimental infections of mice with the African trypanosome Trypanosoma brucei lead to a profound state of T-cell unresponsiveness in the lymph node cell (LNC) compartment. This suppression is mediated by macrophage-like cells which inhibit interleukin 2 (IL-2) secretion and down-regulate IL-2 receptor expression (M....
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.64.6.1937-1943.1996
更新日期:1996-06-01 00:00:00
abstract::An antigenic complex has been isolated in a highly purified from from the Melvin strain of Neisseria gonorrhoeae. The complex has a molecular weight of 9.3 x 10(6) and on sodium dodecyl sulfate-polyacrylamide gel electrophoresis was found to consist of several subunits; the most predominant had the following molecular...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.25.2.635-644.1979
更新日期:1979-08-01 00:00:00
abstract::An immunomodulatory role of arthropod saliva has been well documented, but evidence for an effect on Plasmodium sp. infectiousness remains controversial. Mosquito saliva may orient the immune response toward a Th2 profile, thereby priming a Th2 response against subsequent antigens, including Plasmodium. Orientation to...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.06414-11
更新日期:2012-06-01 00:00:00