A dynamic model of gene expression in monocytes reveals differences in immediate/early response genes between adult and neonatal cells

Shelley Lawrence, Yuhong Tang, M. Barton Frank, Igor Dozmorov, Kaiyu Jiang, Yanmin Chen, Craig Cadwell, Sean Turner, Michael Centola, James N. Jarvis

Research output: Contribution to journalArticle

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Abstract

Neonatal monocytes display immaturity of numerous functions compared with adult cells. Gene expression arrays provide a promising tool for elucidating mechanisms underlying neonatal immune function. We used a well-established microarray to analyze differences between LPS-stimulated human cord blood and adult monocytes to create dynamic models for interactions to elucidate observed deficiencies in neonatal immune responses. We identified 168 genes that were differentially expressed between adult and cord monocytes after 45 min incubation with LPS. Of these genes, 95% (159 of 167) were over-expressed in adult relative to cord monocytes. Differentially expressed genes could be sorted into nine groups according to their kinetics of activation. Functional modelling suggested differences between adult and cord blood in the regulation of apoptosis, a finding confirmed using annexin binding assays. We conclude that kinetic studies of gene expression reveal potentially important differences in gene expression dynamics that may provide insight into neonatal innate immunity.

Original languageEnglish (US)
Article number4
JournalJournal of Inflammation
Volume4
DOIs
StatePublished - Feb 28 2007

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ASJC Scopus subject areas

  • Clinical Biochemistry
  • Cell Biology

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