Heterogeneity of recombinant granulocyte-macrophage colony-stimulating factor-mediated enhancement of neutrophil adherence to endothelium.
Human recombinant (r) and chemically synthesized granulocyte-macrophage colony-stimulating factor (GM-CSF) was found to enhance the attachment of neutrophils to monolayers of human umbilical vein endothelial cells by direct action upon the neutrophil. Using synthetic peptides of GM-CSF with truncated amino and carboxy termini, a region between amino acids 14 and 24 was found to be essential for neutrophil attachment. In analysis of the response of neutrophils from individual donors, a heterogeneity in their capacity to respond to GM-CSF by increased adherence was observed. The level of response to GM-CSF did not depend on receptor number. However, a positive correlation (r = 0.58) was found between the ability to respond to GM-CSF and the level of response to tumor necrosis factor--suggesting a link between the responses of neutrophils to these two cytokines. The stimulation of neutrophil adhesiveness to endothelial cells by rGM-CSF and the heterogeneity in donor response may have important implications for the clinical administration of GM-CSF.
Division of Human Immunology, Institute of Medical and Veterinary Science, Adelaide, South Australia.
J R
JR
Gamble
T H
TH
Rand
A F
AF
Lopez
I
I
Clark-Lewis
M A
MA
Vadas
D000328:Adult; D001667:Binding, Competitive; D002448:Cell Adhesion; D002478:Cells, Cultured; D003115:Colony-Stimulating Factors / Q000494:pharmacology*; D004730:Endothelium, Vascular / Q000166:cytology*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D006133:Growth Substances / Q000494:pharmacology*; D006801:Humans; D008875:Middle Aged; D009504:Neutrophils / Q000502:physiology*; D010446:Peptide Fragments / Q000494:pharmacology; D011994:Recombinant Proteins / Q000494:pharmacology; D013329:Structure-Activity Relationship; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D014471:Umbilical Veins
D003115:Colony-Stimulating Factors; D006133:Growth Substances; D010446:Peptide Fragments; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D016178:Granulocyte-Macrophage Colony-Stimulating Factor