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The Oral Commensal Streptococcus mitis Shows a Mixed Memory Th Cell Signature That Is Similar to and Cross-Reactive with Streptococcus pneumoniae 
Engen, Stian André; Rukke, Håkon Valen; Becattini, Simone; Jarrossay, David; Blix, Inger Johanne S.; Petersen, Fernanda Cristina; Sallusto, Federica; Schenck, Karl (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Background Carriage of and infection with Streptococcus pneumoniae is known to predominantly induce T helper 17 (Th17) responses in humans, but the types of Th cells showing reactivity towards commensal streptococci with ...
Extracellular Identification of a Processed Type II ComR/ComS Pheromone of Streptococcus mutans 
Khan, Rabia; Rukke, Håkon Valen; Filho, Antonio Pedro Ricomini; Fimland, Gunnar; Arntzen, Magnus; Thiede, Bernd; Petersen, Fernanda Cristina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The competence-stimulating peptide (CSP) and the sigX-inducing peptide (XIP) are known to induce Streptococcus mutans competence for genetic transformation. For both pheromones, direct identification of the native peptides ...
Markerless genome editing in competent streptococci 
Junges, Roger; Khan, Rabia; Tovpeko, Yanina; Åmdal, Heidi Aarø; Petersen, Fernanda Cristina; Morrison, Donald (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
Selective markers employed in classical mutagenesis methods using natural genetic transformation can affect gene expression, risk phenotypic effects, and accumulate as unwanted genes during successive mutagenesis cycles. ...
Natural transformation of oral streptococci by use of synthetic pheromones 
Salvadori, Gabriela; Junges, Roger; Khan, Rabia; Åmdal, Heidi Aarø; Morrison, Donald A.; Petersen, Fernanda Cristina (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The discovery that Streptococcus pneumoniae uses a competence-stimulating peptide (CSP) to induce competence for natural transformation, and that other species of the mitis and the anginosus streptococcal groups use a ...
Comprehensive Transcriptome Profiles of Streptococcus mutans UA159 Map Core Streptococcal Competence Genes 
Khan, Rabia; Rukke, Håkon Valen; Høvik, Hedda; Åmdal, Heidi Aarø; Chen, T.; Morrison, Donald A.; Petersen, Fernanda Cristina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
In Streptococcus mutans, an oral colonizer associated with dental caries, development of competence for natural genetic transformation is triggered by either of two types of peptide pheromones, competence-stimulating ...
Naturally acquired human immunity to pneumococcus is dependent on antibody to protein antigens 
Wilson, Robert; Cohen, Jonathan M.; Reglinski, Mark; Jose, Ricardo J.; Chan, Win Yan; Marshall, Helina-Elaine; de Vogel, Corné; Gordon, Stephen V.; Goldblatt, David; Petersen, Fernanda Cristina; Baxendale, Helen; Brown, Jeremy S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Naturally acquired immunity against invasive pneumococcal disease (IPD) is thought to be dependent on anti-capsular antibody. However nasopharyngeal colonisation by Streptococcus pneumoniae also induces antibody to protein ...
Antibacterial effect of hydrogen peroxide - titanium dioxide suspensions in the decontamination of rough titanium surfaces 
Wiedmer, David; Petersen, Fernanda Cristina; Lönn-Stensrud, Jessica; Tiainen, Hanna (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
The chemical decontamination of infected dental implants is essential for the successful treatment of peri-implantitis. The aim of this study was to assess the antibacterial effect of a hydrogen peroxide-titanium dioxide ...
Exploring Host–Commensal Interactions in the Respiratory Tract 
Shekhar, Sudhanshu; Schenck, Karl; Petersen, Fernanda Cristina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Commensal microbes are currently in the limelight in biomedical research because they play an important role in health and disease. Humans harbor an enormous diversity of commensals in various parts of the body, including ...
Effects of Expression of Streptococcus pneumoniae PspC on the Ability of Streptococcus mitis to Evade Complement-Mediated Immunity 
Marshall, Helina; José, Ricardo J.; Kilian, Mogens; Petersen, Fernanda Cristina; Brown, Jeremy S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Streptococcus pneumoniae and Streptococcus mitis are genetically closely related and both frequently colonise the naso-oropharynx, yet S. pneumoniae is a common cause of invasive infections whereas S. mitis is only weakly ...
Mouse IgG2a Antibodies Specific for the Commensal Streptococcus mitis Show Stronger Cross-Reactivity with Streptococcus pneumoniae than IgG1 Antibodies 
Shekhar, Sudhanshu; Khan, Rabia; Khan, Ata Ul Razzaq; Petersen, Fernanda Cristina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Here we show that mouse IgG2a and IgG1 antibodies specific for the commensal Streptococcus mitis cross-react with pathogen Streptococcus pneumoniae serotypes 2 and 4, although the cross-reactivity conferred by IgG2a is ...
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