Abstract:
:We report the cloning and expression of Ac-GST-1, a novel glutathione S-transferase from the adult hookworm Ancylostoma caninum, and its possible role in parasite blood feeding and as a vaccine target. The predicted Ac-GST-1 open reading frame contains 207 amino acids (mass, 24 kDa) and exhibited up to 65% amino acid identity with other nematode GSTs. mRNA encoding Ac-GST-1 was detected in adults, eggs, and larval stages, but the protein was detected only in adult hookworm somatic extracts and excretory/secretory products. Using antiserum to the recombinant protein, Ac-GST-1 was immunolocalized to the parasite hypodermis and muscle tissue and weakly to the intestine. Recombinant Ac-GST-1 was enzymatically active, as determined by conjugation of glutathione to a model substrate, and exhibited a novel high-affinity binding site for hematin. The possible role of Ac-GST-1 in parasite heme detoxification during hemoglobin digestion or heme uptake prompted interest in evaluating it as a potential vaccine antigen. Vaccination of dogs with Ac-GST-1 resulted in a 39.4% reduction in the mean worm burden and 32.3% reduction in egg counts compared to control dogs following larval challenge, although the reductions were not statistically significant. However, hamsters vaccinated with Ac-GST-1 exhibited statistically significant worm reduction (53.7%) following challenge with heterologous Necator americanus larvae. These studies suggest that Ac-GST-1 is a possible drug and vaccine target for hookworm infection.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Zhan B,Liu S,Perally S,Xue J,Fujiwara R,Brophy P,Xiao S,Liu Y,Feng J,Williamson A,Wang Y,Bueno LL,Mendez S,Goud G,Bethony JM,Hawdon JM,Loukas A,Jones K,Hotez PJdoi
10.1128/IAI.73.10.6903-6911.2005keywords:
subject
Has Abstractpub_date
2005-10-01 00:00:00pages
6903-11issue
10eissn
0019-9567issn
1098-5522pii
73/10/6903journal_volume
73pub_type
杂志文章abstract::Previous studies have shown that a mutant (designated C4) of Streptococcus mutans 6715 wild type (WT) is defective in glucosyltransferase (GTF)-synthesized insoluble glucan and is avirulent in gnotobiotic rats. This study investigated the factors which would render this mutant virulent in gnotobiotic rats. Microbial a...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.27.3.915-921.1980
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abstract::Internalization of Staphylococcus aureus in bovine endothelial cells (BEC) is increased by tumor necrosis factor alpha stimulation and NF-κB activation. Because the phosphoinositide-3-kinase (PI3K)-Akt signaling pathway also modulates NF-κB activity, we considered whether the internalization of S. aureus by BEC is ass...
journal_title:Infection and immunity
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doi:10.1128/IAI.05303-11
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.3.1440-1443.2001
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abstract::Salmonella typhimurium SH5014 porins induce the release of tumor necrosis factor alpha (TNF-alpha), interleukin 1 alpha (IL-1 alpha), and IL-6 by human monocytes and of gamma interferon (IFN-gamma) and IL-4 by human lymphocytes. Porins at 1 microgram/ml induce the greatest release of TNF-alpha, IL-1 alpha, and IL-6 by...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.61.1.155-161.1993
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.11.7485-7494.2005
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abstract::Toxoplasma gondii is an obligate intracellular parasite that resides in the cytoplasm of its host in a unique membrane-bound vacuole known as the parasitophorous vacuole (PV). The membrane surrounding the parasite is remodeled by the dense granules, secretory organelles that release an array of proteins into the vacuo...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00782-08
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abstract::Ocular inflammation is one of the consequences of infection with the protozoan parasite Toxoplasma gondii. Even if lesions are self-healing in immunocompetent persons, they pose a lifetime risk of reactivation and are a serious threat to vision. As there are virtually no immunological data on reactivating ocular toxop...
journal_title:Infection and immunity
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doi:10.1128/IAI.02985-14
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.74.5.2637-2650.2006
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.72.3.1799-1803.2004
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abstract::The diphtheria toxin repressor (DtxR) is an iron-dependent regulator of diphtheria toxin production and iron uptake in Corynebacterium diphtheriae. It is activated in vitro by divalent metal ions including Fe2+, Cd2+, Co2+, Mn2+, Ni2+, and Zn2+. We characterized 20 different mutations in dtxR induced by bisulfite muta...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.62.5.1600-1608.1994
更新日期:1994-05-01 00:00:00
abstract::Yersinia pestis causes bubonic, pneumonic, and septicemic plague, diseases that are rapidly lethal to most mammals, including humans. Plague develops as a consequence of bacterial neutralization of the host's innate immune response, which permits uncontrolled growth and causes the systemic hyperactivation of the infla...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00570-17
更新日期:2017-10-18 00:00:00
abstract::Host-driven macrophage apoptosis contributes to innate immunity during bacterial infection. Neisseria meningitidis inhibits apoptosis in a variety of cells, but its impact on macrophage apoptosis is unknown. We demonstrate that N. meningitidis prevents macrophage apoptosis via genes encoding nitric oxide detoxificatio...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.74.1.729-733.2006
更新日期:2006-01-01 00:00:00
abstract::Thrombin-induced platelet microbicidal protein 1 (tPMP-1) is a small, cationic peptide generated from rabbit platelets when they are exposed to thrombin in vitro. It has potent microbicidal activity against a broad spectrum of bacterial and fungal pathogens, including Staphylococcus aureus. Previous in vitro studies i...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.67.5.2475-2481.1999
更新日期:1999-05-01 00:00:00
abstract::Polyprotein allergens are a family of structurally homologous molecules from parasitic nematodes which induce specific immunoglobulin E in infected individuals. We show here that both H-2 and non-H-2 factors determine the ability of mice to generate T- and B-cell responses to the filarial polyprotein allergen (Brugia ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.63.8.2892-2898.1995
更新日期:1995-08-01 00:00:00
abstract::Vibrio vulnificus is an oyster-associated bacterial pathogen that causes life-threatening fulminating septicemia and necrotizing wound infections in humans. The capsular polysaccharide of V. vulnificus (VvPS) is critical for virulence. Previously we showed that active immunization of mice with a VvPS-tetanus toxoid (V...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.64.6.2220-2224.1996
更新日期:1996-06-01 00:00:00
abstract::Isolates of Thermoplasma acidophilum were divided into serological groups based on immunodiffusion studies of solubilized-membrane preparations. ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.10.1.280-281.1974
更新日期:1974-07-01 00:00:00
abstract::Schistosoma mansoni-infected wild-type (WT) mice develop a Th2 response and chronic disease. In contrast, infected interleukin-4 double-deficient (IL-4(-/-)) mice develop a Th1-like response and an acute, lethal syndrome. Disease severity in these animals correlates with excessive and prolonged production of nitric ox...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.70.1.177-184.2002
更新日期:2002-01-01 00:00:00
abstract::Cytoadherence-linked asexual gene 9 (Clag9), a conserved Plasmodium protein expressed during the asexual blood stages, is involved in the cytoadherence of infected red blood cells (RBCs) to the endothelial lining of blood vessels. Here, we show that Plasmodium falciparum Clag9 (PfClag9) is a component of the PfClag9-R...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00504-19
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abstract::Burkholderia pseudomallei, a causative agent of melioidosis, is a Gram-negative facultative intracellular bacterium that can survive and multiply in macrophages. Previously, we demonstrated that B. pseudomallei failed to activate gene expression downstream of the MyD88-independent pathway, particularly the expression ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01254-10
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abstract::H(2)O(2) levels accumulated by Mycoplasma pneumoniae can be influenced by carbon source, different horse sera, yeast extract, thallium acetate, or growth in a simplified, dialyzed medium. Thus, increased levels of H(2)O(2) were detected by growth in glycerol, by omission of thallium acetate, and by the use of dialyzed...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.3.1.80-86.1971
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.62.3.892-896.1994
更新日期:1994-03-01 00:00:00
abstract::Pneumocystis carinii pneumonia (PcP) is a clinically important infection of immunocompromised patients. Although the interaction of Pneumocystis with the alveolar epithelium has been well documented, very little information regarding the epithelial response to Pneumocystis is currently available. In order to study Pne...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.5.2766-2777.2005
更新日期:2005-05-01 00:00:00
abstract::Strains of Bacteroides fragilis associated with diarrhea in children (termed enterotoxigenic B. fragilis, or ETBF) produce a heat-labile ca. 20-kDa protein toxin (BFT). The purpose of this study was to examine the activity of BFT on polarized monolayers of human intestinal epithelial cells (T84 cells). In Ussing chamb...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.65.9.3561-3570.1997
更新日期:1997-09-01 00:00:00
abstract::The appearance of lymphotoxin in the culture fluid of phytohemagglutinin (PHA)-stimulated mouse spleen cells required two cell fractions that were separated by adherence to plastic. Upon stimulation with PHA, neither cell fraction alone produced significant amounts of lymphotoxin; however, when the cell fractions were...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.36.3.1028-1035.1982
更新日期:1982-06-01 00:00:00
abstract::The immunostimulation provided by the mycobacterial cell wall has been exploited for many decades, e.g., in Freund's complete adjuvant. Recently, the underlying mechanism behind this adjuvant activity, including Toll receptor signaling, has begun to be unraveled, confirming the potential of mycobacterial constituents ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.73.9.5817-5826.2005
更新日期:2005-09-01 00:00:00
abstract::In vitro or animal models have been used to investigate the pathogenesis of Helicobacter pylori infection. However, extrapolation to humans of results obtained with these heterologous models remains difficult. We have developed a new model for the study of H. pylori infection that uses human entire embryonic stomachs ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00
abstract::Group A streptococci isolated from skin adhere in greater numbers to human skin epithelial cells than to cells obtained from buccal mucosa whereas streptococci isolated from a throat tend to adhere in greater numbers to buccal epithelial cells than to skin epithelial cells in vitro. M protein-producing strains of grou...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.18.2.555-557.1977
更新日期:1977-11-01 00:00:00
abstract::Individuals in areas of Plasmodium falciparum endemicity develop immunity to malaria after repeated exposure. Knowledge of the acquisition and nature of protective immune responses to P. falciparum is presently limited, particularly for young children. We examined antibodies (IgM, IgG, and IgG subclasses) to merozoite...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.02398-14
更新日期:2015-02-01 00:00:00
abstract::This study was carried out to determine the role of nitric oxide (NO) in Staphylococcus aureus infection in mice. NO production in spleen cell cultures was induced by heat-killed S. aureus. Expression of mRNA of the inducible isoform of NO synthase (iNOS) was induced in the spleens and kidneys of S. aureus-infected mi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.66.3.1017-1022.1998
更新日期:1998-03-01 00:00:00
abstract::Haemophilus influenzae type b infection of immersed and air interface organ cultures for 24 h caused significant epithelial damage. Bacterial association with mucus, damaged epithelium, and unciliated cells was significantly higher in air interface than immersed organ cultures, and total bacterial association was 55.8...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.64.6.2353-2355.1996
更新日期:1996-06-01 00:00:00