Abstract:
:The American Heart Association supports an association between periodontal diseases and atherosclerosis but not a causal association. This study explores the use of the integrin β6(-/-) mouse model to study the causality. We investigated the ability of a polymicrobial consortium of Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia, and Fusobacterium nucleatum to colonize the periodontium and induce local and systemic inflammatory responses. Polymicrobially infected Itgβ6(-/-) mice demonstrate greater susceptibility to gingival colonization/infection, with severe gingival inflammation, apical migration of the junctional epithelium, periodontal pocket formation, alveolar bone resorption, osteoclast activation, bacterial invasion of the gingiva, a greater propensity for the bacteria to disseminate hematogenously, and a strong splenic T cell cytokine response. Levels of atherosclerosis risk factors, including serum nitric oxide, oxidized low-density lipoprotein, serum amyloid A, and lipid peroxidation, were significantly altered by polybacterial infection, demonstrating an enhanced potential for atherosclerotic plaque progression. Aortic gene expression revealed significant alterations in specific Toll-like receptor (TLR) and nucleotide-binding domain- and leucine-rich-repeat-containing receptor (NLR) pathway genes in response to periodontal bacterial infection. Histomorphometry of the aorta demonstrated larger atherosclerotic plaques in Itgβ6(-/-) mice than in wild-type (WT) mice but no significant difference in atherosclerotic plaque size between mice with polybacterial infection and mice with sham infection. Fluorescence in situ hybridization demonstrated active invasion of the aortic adventitial layer by P. gingivalis. Our observations suggest that polybacterial infection elicits distinct aortic TLR and inflammasome signaling and significantly increases local aortic oxidative stress. These results are the first to demonstrate the mechanism of the host aortic inflammatory response induced by polymicrobial infection with well-characterized periodontal pathogens.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Velsko IM,Chukkapalli SS,Rivera-Kweh MF,Zheng D,Aukhil I,Lucas AR,Larjava H,Kesavalu Ldoi
10.1128/IAI.01077-15subject
Has Abstractpub_date
2015-12-01 00:00:00pages
4582-93issue
12eissn
0019-9567issn
1098-5522pii
IAI.01077-15journal_volume
83pub_type
杂志文章abstract::Brucella abortus is a class III zoonotic bacterial pathogen able to survive and replicate inside host cells, including macrophages. Here we report a multidimensional transposon sequencing analysis to identify genes essential for Brucella abortus growth in rich medium and replication in RAW 264.7 macrophages. The const...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00312-18
更新日期:2018-07-23 00:00:00
abstract::Four monoclonal antibodies (MAbs) were produced by immunizing mice with a disrupted yeast cell homogenate of Histoplasma capsulatum. MAbs 1 and 2 reacted only with the yeast cell antigens of H. capsulatum and Blastomyces dermatitidis, whereas MAbs 3 and 4 showed broader cross-reactivity. MAb 3 cross-reacted with B. de...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.57.3.896-901.1989
更新日期:1989-03-01 00:00:00
abstract::Although the periodontal pathogen Porphyromonas gingivalis must withstand high levels of nitrosative stress while in the oral cavity, the mechanisms of nitrosative stress defense are not well understood in this organism. Previously we showed that the transcriptional regulator HcpR plays a significant role in defense, ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00572-18
更新日期:2019-03-25 00:00:00
abstract::The character of the antibody response in the rabbit to Salmonella typhimurium somatic (O) antigen was similar to the response to each of several serotypes of Shigella flexneri O antigens, namely a predominance of production of immunoglobulin M (IgM) antibody. Lipopolysaccharide protein (LPSP) and lipopolysaccharide (...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:
更新日期:1970-03-01 00:00:00
abstract::We have previously identified two K88ac adhesion receptors (210 and 240 kDa) which are present in membrane preparations from adhesive but not nonadhesive porcine intestinal brush border cells; these adhesin receptors are postulated to be important determinants of the susceptibility of pigs to K88ac+ enterotoxigenic Es...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.62.12.5404-5410.1994
更新日期:1994-12-01 00:00:00
abstract::We investigated the effect of the extracellular protease of Serratia marcescens on human serum constituents such as immunoglobulins, fibronectin, alpha 1-protease inhibitor, alpha 2-macroglobulin, lysozyme, and transferrin. At a very low concentration of Serratia 56-kilodalton protease (56K protease), purified human p...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.53.3.522-529.1986
更新日期:1986-09-01 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::The intravascular trematode Schistosoma mansoni is a causative agent of schistosomiasis, a disease that constitutes a major health problem globally. In this study we cloned and characterized the schistosome tegumental phosphodiesterase SmNPP-5 and evaluated its role in parasite virulence. SmNPP-5 is a 52.5-kDa protein...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.05431-11
更新日期:2011-10-01 00:00:00
abstract::The effect of route of administration, dosage, and number of boosts employed during immunization with the polymyxin-release form of Escherichia coli heat-labile (LT) enterotoxin on the degree and duration of protection afforded was evaluated in rats which were challenged by the ligated loop technique. Increasing the b...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.27.1.81-86.1980
更新日期:1980-01-01 00:00:00
abstract::The efficacy of the innate immune system depends on its ability to mount an appropriate response to diverse infections and damaging agents. Key components of this system are pattern recognition receptors that detect pathogen-associated and damage-associated molecular patterns (PAMPs and DAMPs). Nlrp1b is a pattern rec...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01003-12
更新日期:2013-02-01 00:00:00
abstract::The Yersinia high-pathogenicity island (HPI) is common to multiple virulence strategies used by Escherichia coli strains associated with urinary tract infection (UTI). Among the genes in this island are ybtP and ybtQ, encoding distinctive ATP binding cassette (ABC) proteins associated with iron(III)-yersiniabactin imp...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01211-15
更新日期:2016-04-22 00:00:00
abstract::Extracellular protease activity was measured in liquid cultures of representative strains from six serotypes of Legionella pneumophila. A variety of substrates were degraded, including denatured casein, skim milk, gelatin, and hide powder azure, but not elastin. ...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.34.1.299-302.1981
更新日期:1981-10-01 00:00:00
abstract::Borrelia burgdorferi is a causative agent of Lyme disease, the most common arthropod-borne disease in the United States. B. burgdorferi evades host immune defenses to establish a persistent, disseminated infection. Previous work showed that P66-deficient B. burgdorferi (Δp66) is cleared quickly after inoculation in mi...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00186-17
更新日期:2018-01-22 00:00:00
abstract::Intra-abdominal polymicrobial infections cause significant morbidity and mortality. An experimental mouse model of Candida albicans-Staphylococcus aureus intra-abdominal infection (IAI) results in 100% mortality by 48 to 72 h postinoculation, while monomicrobial infections are avirulent. Mortality is associated with r...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01059-15
更新日期:2015-10-19 00:00:00
abstract::Immune and pathologic responses were measured for 20 weeks after infection of mice with Brucella abortus 19, RB51, or 2308. Live bacteria and bacterial antigens of 19 and RB51 persisted in spleens for 10 and 4 weeks after infection, respectively, whereas 2308 bacteria and bacterial antigens persisted for at least 20 w...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.62.8.3206-3212.1994
更新日期:1994-08-01 00:00:00
abstract::GNA33 is a membrane-bound lipoprotein with murein hydrolase activity that is present in all Neisseria species and well conserved in different meningococcal isolates. The protein shows 33% identity to a lytic transglycolase (MltA) from Escherichia coli and has been shown to be involved in the degradation of both insolu...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.72.4.1914-1919.2004
更新日期:2004-04-01 00:00:00
abstract::Erythrocytic malaria parasites degrade hemoglobin as a principal source of amino acids for parasite protein synthesis. We have previously shown that a Plasmodium falciparum trophozoite cysteine proteinase, now termed falcipain, is required for hemoglobin degradation, and we have hypothesized that this proteinase is re...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.63.6.2120-2125.1995
更新日期:1995-06-01 00:00:00
abstract::We have previously shown that a Pasteurella multocida cexA mutant (PBA875) was impaired in capsule export and highly attenuated in virulence for mice (J. D. Boyce and B. Adler, Infect. Immun. 68:3463-3468, 2000). In this study we show that immunization with high, but not low, doses of PBA875 can confer significant pro...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.69.3.1943-1946.2001
更新日期:2001-03-01 00:00:00
abstract::Intracellular growth of Legionella pneumophila occurs in a replication vacuole constructed by host proteins that regulate vesicular traffic from the host endoplasmic reticulum (ER). This process is promoted by a combination of approximately 300 Icm/Dot translocated substrates (IDTS). One of these proteins, Ceg9, was p...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00507-15
更新日期:2015-09-01 00:00:00
abstract::A synthetic medium capable of supporting growth of Vibrio parahaemolyticus is described. Growth yields and generation times were comparable to growth in a complex medium, although Kanagawa hemolysin was undetectable in the synthetic medium. Upon the addition of single amino acids to this synthetic medium, only D-trypt...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.37.1.60-63.1982
更新日期:1982-07-01 00:00:00
abstract::Cutaneous leishmaniasis (CL) caused by Leishmania braziliensis is characterized by a strong Th1 response that leads to skin lesion development. In areas where L. braziliensis transmission is endemic, up to 15% of healthy subjects have tested positive for delayed-type hypersensitivity to soluble leishmania antigen (SLA...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.02404-14
更新日期:2015-03-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.60.7.2702-2709.1992
更新日期:1992-07-01 00:00:00
abstract::Cryptococcus neoformans is a facultative intracellular opportunistic pathogen and the leading cause of fungal meningitis in humans. In the absence of a protective cellular immune response, the inhalation of C. neoformans cells or spores results in pulmonary infection. C. neoformans cells produce a polysaccharide capsu...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.00088-09
更新日期:2009-07-01 00:00:00
abstract::Natural heterogeneity in the structure of the lipid A portion of lipopolysaccharide (LPS) produces differential effects on the innate immune response. Gram-negative bacterial species produce LPS structures that differ from the classic endotoxic LPS structures. These differences include hypoacylation and hypophosphoryl...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01150-12
更新日期:2013-09-01 00:00:00
abstract::The need for agents designed to modify immune response in the treatment of patients with viral infection, immunodeficiency, or cancer prompted the present study on the mechanisms of action of isoprinosine, a compound developed for antiviral use and whose therapeutic activity may involve the immune system. The effect o...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.13.2.382-387.1976
更新日期:1976-02-01 00:00:00
abstract::The outer membrane of pathogenic Leptospira species grown in culture media contains lipopolysaccharide (LPS), a porin (OmpL1), and several lipoproteins, including LipL36 and LipL41. The purpose of this study was to characterize the expression and distribution of these outer membrane antigens during renal infection. Ha...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.67.2.853-861.1999
更新日期:1999-02-01 00:00:00
abstract::In experimental Leishmania donovani infection in BALB/c mice, initial susceptibility gives way to T-cell-dependent acquired resistance and eventual control over visceral infection. Since various cytokines appear to underlie the host response to Leishmania infection, we examined infected liver tissue for gene expressio...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.62.3.1058-1063.1994
更新日期:1994-03-01 00:00:00
abstract::The effects of passive administration of neutralizing monoclonal antibodies (MAB) to respiratory syncytial virus glycoproteins (GP90 and VP70) was evaluated in cotton rats challenged with respiratory syncytial virus. Animals injected with MAB to VP70 had lower mean viral titers in lung tissues than did controls (log10...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.43.2.756-758.1984
更新日期:1984-02-01 00:00:00
abstract::Gonococci from opaque colonies have cell wall outer membrane proteins that are lacking from organisms which form transparent colonies. These "colony opacity-associated" proteins are among a group of "minor" proteins that exhibit heat modification of their apparent subunit molecular sizes, are easily extracted by deoxy...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.28.1.54-64.1980
更新日期:1980-04-01 00:00:00
abstract::Enterococcus faecalis is a highly stress resistant opportunistic pathogen. The intrinsic ruggedness of this bacterium is supposed to be the basis of its capacity to colonize the hostile environments of hospitals and to cause several kinds of infections. We show in this work that general resistance to very different en...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.01299-12
更新日期:2013-08-01 00:00:00