Disparate gene expression of chemotactic cytokines by human mononuclear phagocytes

Chemotactic cytokines are becoming increasingly recognized as important participants in the coordinate recruitment of specific inflammatory cells. In this manuscript we present data demonstrating that LPS challenged human mononuclear phagocytic cells can express mRNA for neutrophil chemotactic factor/interleukin-8 ( NCF IL-8 ), but do not express mRNA for monocyte chemotactic protein (MCP). The expression of NCF IL-8 mRNA was time and dose dependent. This identical stimulus response was also found in peripheral blood neutrophils. These studies demonstrate a disparate production of chemotactic cytokines by macrophages and exemplify the dynamic nature of the chemotactic response.