Gene expression analysis of children with acute hematogenous osteomyelitis caused by methicillin-resistant staphylococcus aureus: Correlation with clinical severity of illness

Claudia Gaviria-Agudelo, Kristen Carter, Naureen Tareen, Virginia Pascual, Lawson A. Copley

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Children with acute hematogenous osteomyelitis (AHO) demonstrate a broad spectrum of clinical manifestations, ranging from mild to severe. Several advances have been achieved in the study of host immune response to acute invasive Staphylococcus aureus infections through gene expression analysis. However, previous research has neither attempted to evaluate the response of children with AHO specific to Methicillin-resistant Staphylococcus aureus (MRSA) nor to correlate gene expression with clinical phenotype. Study objective was to correlate gene expression of children with AHO due to MRSA with clinical severity of illness. Whole blood samples were obtained in Tempus tubes from 12 children with osteomyelitis once cultures obtained directly from the site of infection confirmed to be positive for MRSA. Using an Illumina platform and a systems-wide modular analysis, microarray findings from ten of these children were compared to that of nine healthy (age, ethnicity and gender) matched controls and correlated with clinical severity of illness. Children with AHO from MRSA demonstrated over-expression of innate immunity with respect to neutrophil activity, coagulation, inflammatory response, and erythrocyte development. Concurrently, these children demonstrated under-expression of adaptive immunity with respect to lymphocyte activation and activity of T-cell, cytotoxic or NK cell, and B-cell lines. Three over-expressed genes, P2RX1, SORT1, and RETN, and two under-expressed genes, LOC641788 and STAT 4, were significantly correlated with severity of illness. STAT 4 showed the strongest correlation (R2 = -0.83). STAT4 downregulation could potentially explain under-expression of genes related to adaptive immunity in this cohort of patients with AHO. This study identified specific genes which correspond to disease severity during the early hospitalization of children with AHO from MRSA. Pattern recognition of this combination of genes could help to identify in the future severe clinical phenotypes before the disease is fully manifest and direct appropriate attention and resources to those children.

Original languageEnglish (US)
Article numbere103523
JournalPLoS One
Volume9
Issue number7
DOIs
StatePublished - Jul 30 2014

Fingerprint

osteomyelitis
Methicillin
Osteomyelitis
Methicillin-Resistant Staphylococcus aureus
Gene expression
Genes
Gene Expression
gene expression
Adaptive Immunity
T-cells
Lymphocytes
Microarrays
Coagulation
Pattern recognition
genes
Blood
Chemical activation
Cells
Phenotype
methicillin-resistant Staphylococcus aureus

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Gene expression analysis of children with acute hematogenous osteomyelitis caused by methicillin-resistant staphylococcus aureus : Correlation with clinical severity of illness. / Gaviria-Agudelo, Claudia; Carter, Kristen; Tareen, Naureen; Pascual, Virginia; Copley, Lawson A.

In: PLoS One, Vol. 9, No. 7, e103523, 30.07.2014.

Research output: Contribution to journalArticle

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