The effects and comparative differences of neutrophil specific chemokines on neutrophil chemotaxis of the neonate

Samuel E. Fox, Wenge Lu, Akhil Maheshwari, Robert D. Christensen, Darlene A. Calhoun

Research output: Contribution to journalArticle

Abstract

Neutrophil specific chemokines are potent chemoattractants for neutrophils. IL-8/CXCL8 is the most extensively studied member of this group, and its concentrations increase during inflammatory conditions of the newborn infant including sepsis and chronic lung disease. A significant amount of information exists on the effects of IL-8/CXCL8 on neutrophil chemotaxis of neonates, but little is known about the other neutrophil specific chemokines. The aim of this study was to determine the relative potency of the neutrophil specific chemokines on chemotaxis of neonatal neutrophils and to compare this effect with the effect on adult neutrophils. Neutrophils were isolated from cord blood or healthy adult donors and incubated in a Neuroprobe chemotaxis chamber. Chemokine concentrations ranging from 1-1000 ng/mL were used. Differences in chemotactic potency existed among the seven neutrophil specific chemokines. Specifically, at 100 ng/mL, the order was IL-8/CXCL8 > GRO-α/CXCL1 > GCP-2/CXCL6 > NAP-2/CXCL7 > ENA-78/CXCL5 > GRO-γ/CXCL2 > GRO-β/CXCL3. This pattern was observed for adult and neonatal neutrophils. We conclude that (1) neutrophils from cord blood exhibit the same pattern of potency for each ELR chemokine as neutrophils from adults, and (2) migration of neonatal neutrophils is significantly less than that of adults at every concentration examined except the lowest (1 ng/mL).

Original languageEnglish (US)
Pages (from-to)135-140
Number of pages6
JournalCytokine
Volume29
Issue number3
DOIs
StatePublished - Feb 7 2005

    Fingerprint

Keywords

  • Chemokine
  • Chemotaxis
  • Migration
  • Neonate
  • Neutrophil

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Biochemistry
  • Hematology
  • Molecular Biology

Cite this