Hierarchy of human IgG recognition within the Staphylococcus aureus immunome

Staphylococcus aureus is an opportunistic pathogen that causes a range of serious infections associated with significant morbidity, by strains increasingly resistant to antibiotics. However, to date all candidate vaccines have failed to induce protective immune responses in humans. We need a more co...

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Bibliographic Details
Published in:Scientific reports 2018-09, Vol.8 (1), p.13296-10, Article 13296
Main Authors: Radke, Emily E., Brown, Stuart M., Pelzek, Adam J., Fulmer, Yi, Hernandez, David N., Torres, Victor J., Thomsen, Isaac P., Chiang, William K., Miller, Andy O., Shopsin, Bo, Silverman, Gregg J.
Format: Article
Language:English
Subjects:
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Antibiotics
Convalescence
Drug resistance
Humanities and Social Sciences
Immune response
Immunoglobulin G
Joint diseases
Methicillin
Morbidity
multidisciplinary
Open reading frames
Opportunist infection
Osteomyelitis
Proteins
Science
Science (multidisciplinary)
Skin
Staphylococcus aureus
Staphylococcus infections
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Summary:Staphylococcus aureus is an opportunistic pathogen that causes a range of serious infections associated with significant morbidity, by strains increasingly resistant to antibiotics. However, to date all candidate vaccines have failed to induce protective immune responses in humans. We need a more comprehensive understanding of the antigenic targets important in the context of human infection. To investigate infection-associated immune responses, patients were sampled at initial presentation and during convalescence from three types of clinical infection; skin and soft tissue infection (SSTI), prosthetic joint infection (PJI) and pediatric hematogenous osteomyelitis (PHO). Reactivity of serum IgG was tested with an array of recombinant proteins, representing over 2,652 in-vitro -translated open reading frames (ORFs) from a community-acquired methicillin-resistant S . aureus USA300 strain. High-level reactivity was demonstrated for 104 proteins with serum IgG in all patient samples. Overall, high-level IgG-reactivity was most commonly directed against a subset of secreted proteins. Although based on limited surveys, we found subsets of S . aureus proteins with differential reactivity with serum samples from patients with different clinical syndromes. Together, our studies have revealed a hierarchy within the diverse proteins of the S . aureus “immunome”, which will help to advance efforts to develop protective immunotherapeutic agents.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-31424-3