VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Lipoxin A4 and serum amyloid a differentially modulate phospholipase D in human fibroblast-like synoviocytes
    Sodin-Šemrl, Snežna, 1962- ...
    Lipoxin A4 (LXA4) and serum amyloid A (SAA) are endogenous negative and positive modulators of inflammation, respectively. Both molecules bind the shared lipoxin A4 receptor (ALX) and elicit opposing ... effects on the productionof inflammatory cytokines and matrix metalloproteinases. The aim of these studies is to examine the divergence of the intracellular signaling pathways triggered by lipid LXA4 (1 nM) and protein SAA (200 nM) ligands of ALX. Phospholipase D (PLD) is a phosphohydrolase enzyme that catalyzes the generation of phosphatidic acid (PA) from membrane phospholipids. Our results showed that in fibroblast-like synoviocytes, activation of PLD occurred only in response to LXA4, and not SAA. PA (30 ìM) mimicked LXA4 and demonstrated inhibition of IL-8 production induced by SAA or interleukin-1â. In sharp contrast to LXA4, SAA confirmed the stimulation of IL-8 release as determined previously. Taken together, these findings suggest that two physiologic ligands sharing the common ALX receptor, LXA4 and SAA, differentially regulatethe level of PLD activation and differentially modulate IL-8. These results may have important implications for understanding the regulation of inflammatory responses under physiologic and pathological conditions.
    Vir: European Journal of Inflammation. - ISSN 1721-727X (Letn. 7, št. 1, 2009, str. 9-17)
    Vrsta gradiva - članek, sestavni del
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 26823897

Vnos na polico