Preferred Label : Formyl Peptide Receptor 1 Signaling Pathway;
NCIt related terms : fMLP induced chemokine gene expression in HMC-1 cells;
Alternative definition : BIOCARTA: Neutrophils respond to bacterial infection by releasing reactive oxygen
species that kill bacteria and by expressing chemokines that attract other immune
cells to the site of infection. The multisubunit enzyme NADPH oxidase, expressed by
neutrophils, produces reactive oxygen species that are rapidly released in what is
known as the respiratory burst. Activity of the NADPH oxidase is induced by fMLP receptor
ligands, formylated peptides from bacteria. The fMLP receptor is a G-protein coupled
receptor, FPR-1, that activates Map kinase pathways and phospholipase C. Phospholipase
C activation releases IP3 and calcium, activating protein kinase C and also activating
the transcription factor NFAT, which contributes to activation of chemokine genes.
One of the components of the NADPH oxidase is p47phox. PKC activation phosphorylates
p47phox to activate NADPH oxidase activity. Activation of Map kinase cascades leads
to Erk1/Erk2 dependent p47phox phosphorylation as well as activation of the Elk-1
transcription factor and chemokine gene expression. Inhibition of p38 did not affect
p47phox phosphorylation, indicating that p38 is not involved in Erk1/2 activation
of the NADPH oxidase. Inhibition of p38 did inhibit NADPH oxidase though, indicating
that other pathways contribute to activation of this enzyme. (This definition may
be outdated - see the DesignNote.);
NCIt note : The BIOCARTA Definition (ALT_DEFINITION) for this pathway concept was provided by
BioCarta. This property was not created by, nor is it maintained by the NCI Thesaurus
staff. Additionally, BioCarta is no longer updating its pathway data; thus, the BIOCARTA
Definition might be outdated or inaccurate. Please see the Terms and Conditions for
Use at http://www.biocarta.com/.;
Biocarta ID : h_fMLPpathway;
Origin ID : C39082;
UMLS CUI : C1517299;
Semantic type(s)
has_gene_product_element
pathway_has_gene_element