About: Phospholipid Signaling Pathway

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Attributes	Values
rdf:type	Class
rdfs:label	Phospholipid Signaling Pathway
rdfs:subClassOf	Signaling Pathway
Semantic_Type	Functional Concept
Preferred_Name	Phospholipid Signaling Pathway
UMLS_CUI	C1519058
BioCarta_ID	h_edg1Pathway
ALT_DEFINITION	Sphingosine-1-phosphate (S1P) is an example of a lipid messenger with both intracellular and extracellular functions. Intracellularly S1P regulates proliferation and survival; extracellularly S1P is a ligand for EDG1 (also known as S1P1). Activation of sphingosine kinase (SPHK), the enzyme that catalyzes the phosphorylation of sphingosine, increases cellular levels of S1P. Inhibitors of SPHK block formation of S1P and inhibit cellular proliferation induced by a variety of factors, including platelet-derived growth factor (PDGF) and PMA. In a study using endothelial cells it was demonstrated that S1P induces activation of alpha-v and B3 integrins via RhoA. S1P also activates Akt via Gi and PI3K. The activated Akt phosphorylates the Edg1 receptor on threonine 236 leading to the activation of Rac1 and subsequent signals leading to actin assembly, chemotaxis and lamellipodia formation. Edg1 stimulation also leads to the activation of the ERK signaling cascade resulting in anti-apoptotic reversal, proliferation and cell survival.BIOCARTA
Legacy_Concept_Name	Phospholipid_Signaling_Pathway
FULL_SYN	Phospholipids as signaling intermediariesPTBIOCARTA Phospholipid Signaling PathwayPTNCI
code	C39055
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