TY - JOUR
T1 - Genomic expression profiling across the pediatric systemic inflammatory response syndrome, sepsis, and septic shock spectrum
AU - Wong, Hector R.
AU - Cvijanovich, Natalie
AU - Allen, Geoffrey L.
AU - Lin, Richard
AU - Anas, Nick
AU - Meyer, Keith
AU - Freishtat, Robert J.
AU - Monaco, Marie
AU - Odoms, Kelli
AU - Sakthivel, Bhuvaneswari
AU - Shanley, Thomas P.
PY - 2009/5
Y1 - 2009/5
N2 - Objectives: To advance our biological understanding of pediatric septic shock, we measured the genome-level expression profiles of critically ill children representing the systemic inflammatory response syndrome (SIRS), sepsis, and septic shock spectrum. Design: Prospective observational study involving microarray-based bioinformatics. Setting: Multiple pediatric intensive care units in the United States. Patients: Children ≤10 years of age: 18 normal controls, 22 meeting criteria for SIRS, 32 meeting criteria for sepsis, and 67 meeting criteria for septic shock on day 1. The available day 3 samples included 20 patients still meeting sepsis criteria, 39 patients still meeting septic shock criteria, and 24 patients meeting the exclusive day 3 category, SIRS resolved. Interventions: None other than standard care. Measurements and Main Results: Longitudinal analyses were focused on gene expression relative to control samples and patients having paired day 1 and day 3 samples. The longitudinal analysis focused on up-regulated genes revealed common patterns of up-regulated gene expression, primarily corresponding to inflammation and innate immunity, across all patient groups on day 1. These patterns of up-regulated gene expression persisted on day 3 in patients with septic shock, but not to the same degree in the other patient classes. The longitudinal analysis focused on down-regulated genes demonstrated gene repression corresponding to adaptive immunity-specific signaling pathways and was most prominent in patients with septic shock on days 1 and 3. Gene network analyses based on direct comparisons across the SIRS, sepsis, and septic shock spectrum, and all available patients in the database, demonstrated unique repression of gene networks in patients with septic shock corresponding to major histocompatibility complex antigen presentation. Finally, analyses focused on repression of genes corresponding to zinc-related biology demonstrated that this pattern of gene repression is unique to patients with septic shock. Conclusions: Although some common patterns of gene expression exist across the pediatric SIRS, sepsis, and septic shock spectrum, septic shock is particularly characterized by repression of genes corresponding to adaptive immunity and zinc-related biology.
AB - Objectives: To advance our biological understanding of pediatric septic shock, we measured the genome-level expression profiles of critically ill children representing the systemic inflammatory response syndrome (SIRS), sepsis, and septic shock spectrum. Design: Prospective observational study involving microarray-based bioinformatics. Setting: Multiple pediatric intensive care units in the United States. Patients: Children ≤10 years of age: 18 normal controls, 22 meeting criteria for SIRS, 32 meeting criteria for sepsis, and 67 meeting criteria for septic shock on day 1. The available day 3 samples included 20 patients still meeting sepsis criteria, 39 patients still meeting septic shock criteria, and 24 patients meeting the exclusive day 3 category, SIRS resolved. Interventions: None other than standard care. Measurements and Main Results: Longitudinal analyses were focused on gene expression relative to control samples and patients having paired day 1 and day 3 samples. The longitudinal analysis focused on up-regulated genes revealed common patterns of up-regulated gene expression, primarily corresponding to inflammation and innate immunity, across all patient groups on day 1. These patterns of up-regulated gene expression persisted on day 3 in patients with septic shock, but not to the same degree in the other patient classes. The longitudinal analysis focused on down-regulated genes demonstrated gene repression corresponding to adaptive immunity-specific signaling pathways and was most prominent in patients with septic shock on days 1 and 3. Gene network analyses based on direct comparisons across the SIRS, sepsis, and septic shock spectrum, and all available patients in the database, demonstrated unique repression of gene networks in patients with septic shock corresponding to major histocompatibility complex antigen presentation. Finally, analyses focused on repression of genes corresponding to zinc-related biology demonstrated that this pattern of gene repression is unique to patients with septic shock. Conclusions: Although some common patterns of gene expression exist across the pediatric SIRS, sepsis, and septic shock spectrum, septic shock is particularly characterized by repression of genes corresponding to adaptive immunity and zinc-related biology.
KW - Antigen presentation
KW - Children
KW - Inflammation
KW - Microarray
KW - T cell
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=67650470273&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67650470273&partnerID=8YFLogxK
U2 - 10.1097/CCM.0b013e31819fcc08
DO - 10.1097/CCM.0b013e31819fcc08
M3 - Article
C2 - 19325468
AN - SCOPUS:67650470273
SN - 0090-3493
VL - 37
SP - 1558
EP - 1566
JO - Critical care medicine
JF - Critical care medicine
IS - 5
ER -