Abstract:
:The roles of different ribonucleotide reductases (RNRs) in bacterial pathogenesis have not been studied systematically. In this work we analyzed the importance of the different Pseudomonas aeruginosa RNRs in pathogenesis using the Drosophila melanogaster host-pathogen interaction model. P. aeruginosa codes for three different RNRs with different environmental requirements. Class II and III RNR chromosomal mutants exhibited reduced virulence in this model. Translational reporter fusions of RNR gene nrdA, nrdJ, or nrdD to the green fluorescent protein were constructed to measure the expression of each class during the infection process. Analysis of the P. aeruginosa infection by flow cytometry revealed increased expression of nrdJ and nrdD and decreased nrdA expression during the infection process. Expression of each RNR class fits with the pathogenicities of the chromosomal deletion mutants. An extended understanding of the pathogenicity and physiology of P. aeruginosa will be important for the development of novel drugs against infections in cystic fibrosis patients.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Sjöberg BM,Torrents Edoi
10.1128/IAI.01212-10subject
Has Abstractpub_date
2011-07-01 00:00:00pages
2663-9issue
7eissn
0019-9567issn
1098-5522pii
IAI.01212-10journal_volume
79pub_type
杂志文章abstract::The enzyme-linked immunosorbent assay technique was used to quantitate, in milligrams per milliliter, anti-colonization factor antigen/I (CFA/I) immunoglobulin G (IgG) in acute- and convalescent-phase sera of individuals who experienced diarrhea associated with CFA/I-positive enterotoxigenic Escherichia coli. Purified...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.27.2.525-531.1980
更新日期:1980-02-01 00:00:00
abstract::After interaction with tracheal epithelial cells, Bordetella pertussis induces the secretion of interleukin-6. This secretion is dependent on the expression of adenylate cyclase-hemolysin by the bacterium but not on the expression of other characterized bacterial toxins or adhesins. This finding confirms the important...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.72.9.5530-5533.2004
更新日期:2004-09-01 00:00:00
abstract::Streptococcus pneumoniae type 14 capsular polysaccharide-bovine serum albumin (S14PS-BSA) conjugates were prepared by water-soluble-carbodiimide-mediated condensation with or without the use of N-hydroxy-sulfosuccinimide. The immunogenicities of the capsular polysaccharide (S14PS) and of the conjugates were studied in...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.4.1078-1083.1989
更新日期:1989-04-01 00:00:00
abstract::Recognition of microbial patterns by host receptors is the first step in a multistep sequence leading to neutrophil-dependent host resistance. Although the role of membrane-bound sensors in bacterial recognition has been examined in detail, the importance of cytosolic sensors in the lungs is largely unexplored. In thi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.05641-11
更新日期:2011-11-01 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::Inbred BALB/c mice were either immunized with Triton X-100-extracted antigens of blood-stage Plasmodium yoelii or infected with P. yoelii and cured in three successive schedules. Whereas the immunized BALB/c became only partially protected from subsequent challenge infection with blood-stage P. yoelii, the convalescen...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.59.11.3909-3916.1991
更新日期:1991-11-01 00:00:00
abstract::Escherichia coli isolates from patients with bacteriuria of pregnancy were compared by PCR with isolates from patients with community-acquired cystitis for the presence of established virulence determinants. The strains from patients with bacteriuria of pregnancy were less likely to carry genes for P-family, S-family,...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.2.794-799.2001
更新日期:2001-02-01 00:00:00
abstract::The invasion of red blood cells (RBCs) by Plasmodium falciparum is dependent on multiple molecular interactions between erythrocyte receptors and parasite ligands. Invasion studies using culture-adapted parasite strains have indicated significant receptor heterogeneity. It is not known whether this heterogeneity refle...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.72.10.5886-5891.2004
更新日期:2004-10-01 00:00:00
abstract::Immunization of BALB/c mice with a plasmid containing the gene for Trypanosoma cruzi trans-sialidase (TS) induced antibodies that inhibited TS enzymatic activity, CD4+ Th1 and CD8+ Tc1 cells, and protective immunity against infection. We used this model to obtain basic information on the requirement of CD4 or CD8 or B...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.69.9.5477-5486.2001
更新日期:2001-09-01 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::A radioimmunoprecipitation method has been devised which permits the direct identification of those proteins which are both exposed on the cell surface of Haemophilus influenzae type b and accessible to antibody. Both extrinsically and intrinsically radiolabeled cells of this organism were employed as the sources of a...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.33.3.950-953.1981
更新日期:1981-09-01 00:00:00
abstract::Interferon regulatory factor 1-deficient (IRF-1(-/-)) mice infected with virulent Brucella abortus 2308 at 5 x 10(5) CFU developed acute hepatitis similar to many natural hosts but, unlike natural hosts, IRF-1(-/-) mice were unable to resolve infection and died. In contrast, IRF-1(-/-) mice survived when infected at 5...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.70.12.7004-7012.2002
更新日期:2002-12-01 00:00:00
abstract::Haemophilus ducreyi previously has been shown to inhibit the phagocytosis of both secondary targets and itself by certain cells in vitro. Wild-type H. ducreyi strain 35000HP contains two genes, lspA1 and lspA2, whose encoded protein products are predicted to be 456 and 543 kDa, respectively. An isogenic mutant of H. d...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.71.10.5994-6003.2003
更新日期:2003-10-01 00:00:00
abstract::A procedure was developed to purify dermonecrotic toxin (DNT) from a sonic extract of a serotype D strain of Pasteurella multocida. Sonic extract containing DNT was applied to a DEAE-Sephacel column and eluted by a linear gradient of NaCl. Upon rechromatographing, fractions with dermonecrotic activity for guinea pigs ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.46.2.429-434.1984
更新日期:1984-11-01 00:00:00
abstract::A cytotoxigenic Clostridium difficile strain that fails to produce toxin A but causes hemorrhage and bloody fluid accumulation in ligated ileal loops of rabbits and hemorrhage and diarrhea in hamsters is described. The lack of reaction of DNA from this strain in hybridization studies with a toxin A gene-specific 4.5-k...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.60.10.4192-4199.1992
更新日期:1992-10-01 00:00:00
abstract::The leading malaria vaccine candidate, RTS,S, based on the Plasmodium falciparum circumsporozoite protein (CSP), will likely be the first publicly adopted malaria vaccine. However, this and other subunit vaccines, such as virus-vectored thrombospondin-related adhesive protein (TRAP), provide only intermediate to low l...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01063-15
更新日期:2015-12-14 00:00:00
abstract::The serum antibody response and four different cellular immune responses (cytotoxic T cells, delayed-type hypersensitivity T cells, natural killer cells, and cytotoxic macrophage levels) induced in CBA/H mice were measured at different times after intranasal inoculation of a cold-adapted (ca) variant of influenza A vi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.38.1.218-225.1982
更新日期:1982-10-01 00:00:00
abstract::The Streptococcus mutans serotype c gtfA gene encodes a 55-kilodalton sucrose-hydrolyzing enzyme. Analysis of S. mutans gtfA mutants revealed that the mutant strains were specifically impaired in the ability to use melibiose as a sole carbon source. S. mutans gtfA mutant strains synthesized less alpha-galactosidase ac...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.3.992-995.1989
更新日期:1989-03-01 00:00:00
abstract::Sephadex G-200 filtration was used for fractionating dengue type 2 (DEN-2)-infected suckling mouse brain (SMB) supernatant fluids. The high-molecular-weight fraction, which was eluted in the void volume, showed no increase in type specificity when tested against immune ascitic fluid to the four prototype dengue viruse...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.6.6.952-957.1972
更新日期:1972-12-01 00:00:00
abstract::Infection with Mycobacterium avium subsp. paratuberculosis is associated with high levels of morbidity, decreased production, and early culling in dairy cattle. Clinical symptoms of Johne's disease include persistent diarrhea, inappetence, and resultant weight loss due to chronic inflammation of the small intestine. A...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.71.11.6479-6486.2003
更新日期:2003-11-01 00:00:00
abstract::Neisseria gonorrhoeae is the causative agent of the sexually transmitted disease gonorrhea, and infection with this organism is typically associated with an intense inflammatory response. In many individuals, however, the infection is asymptomatic and can progress to serious secondary complications. The type IV pili o...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.74.1.442-448.2006
更新日期:2006-01-01 00:00:00
abstract::The development of chronic pathology in mice at 2 to 10 months after inoculation of 10(2) T. cruzi trypomastigotes can be prevented by preimmunization with live, attenuated culture parasites (strain TCC). Swiss mice received one or three immunizing inoculations of 10(6) TCC organisms and were challenged with 10(2) Tul...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.36.1.351-356.1982
更新日期:1982-04-01 00:00:00
abstract::Pseudomallei group Burkholderia species are facultative intracellular parasites that spread efficiently from cell to cell by a mechanism involving the fusion of adjacent cell membranes. Intercellular fusion requires the function of the cluster 5 type VI secretion system (T6SS-5) and its associated valine-glycine repea...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01367-13
更新日期:2014-04-01 00:00:00
abstract::In the lungs of mice vaccinated with Mycobacterium bovis BCG, there was an accumulation of CD4 cells expressing the activated effector phenotype CD44hi CD62 ligandlo) (CD62Llo) which were capable of secreting gamma interferon. Upon cell transfer, however, cells expressing a resting/naïve phenotype (CD44lo CD62Lhi) wer...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.11.7759-7764.2005
更新日期:2005-11-01 00:00:00
abstract::Vibrio cholerae is a monoflagellated gram-negative bacterium that causes the severe diarrheal disease cholera. In contrast to Salmonella enterica serovar Typhimurium infection, which is accompanied by both acute diarrhea and high-level inflammation, V. cholerae infection is largely noninflammatory in human hosts. Bact...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00736-07
更新日期:2008-03-01 00:00:00
abstract::Capsular types 5 and 8, which account for about 70% of Staphylococcus aureus strains isolated from the blood of patients, resisted in vitro phagocytosis by human polymorphonuclear leukocytes (PMN). Antisera and monoclonal antibody to type 5 and 8 capsular polysaccharides (CPS) induced type-specific in vitro phagocytos...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.56.5.1090-1095.1988
更新日期:1988-05-01 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::Bordetella pertussis was grown in iron (Fe)-free defined medium to limit the growth of the organism. Doubling times of the Fe-starved organism increased by approximately 1 h, and a 40% reduction in the final extent of growth in Fe-depleted medium was observed. Under these conditions, a hydroxamate siderophore named bo...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.60.1.117-123.1992
更新日期:1992-01-01 00:00:00
abstract::Antigen-specific T-cell responses and histopathological changes were studied in mice experimentally inoculated with Borrelia burgdorferi B31. Inbred mice with different H-2 haplotypes and/or different genetic backgrounds were inoculated with B. burgdorferi organisms and tested for antigen-specific T-cell responses in ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.1.41-47.1989
更新日期:1989-01-01 00:00:00
abstract::Di-, tri-, and tetrasaccharides, synthesized according to the chemical structure of pneumococcal polysaccharide type 3 (PS3), were coupled to the cross-reactive material (CRM(197)) of modified diphtheria toxin in different molar carbohydrate/protein ratios using the squarate coupling method. To study protective immuni...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.7.4698-4701.2001
更新日期:2001-07-01 00:00:00