Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

Logo MUG-Forschungsportal

Gewählte Publikation:

SHR Neuro Krebs Kardio Lipid

Riederer, M; Ojala, PJ; Hrzenjak, A; Graier, WF; Malli, R; Tritscher, M; Hermansson, M; Watzer, B; Schweer, H; Desoye, G; Heinemann, A; Frank, S.
Acyl chain-dependent effect of lysophosphatidylcholine on endothelial prostacyclin production.
J Lipid Res. 2010; 51(10):2957-2966 [OPEN ACCESS]
Web of Science PubMed PUBMED Central FullText FullText_MUG Google Scholar

 

Autor/innen der Med Uni Graz:
Desoye Gernot
Frank Saša
Gastrager Michaela
Graier Wolfgang
Heinemann Akos
Hrzenjak Andelko
Malli Roland
Riederer Monika
Altmetrics:

Dimensions Citations:

Plum Analytics:
Number of Figures: 6
| | | | | |
Abstract:
Previously we identified palmitoyl-lysophosphatidylcholine (16:0 LPC), linoleoyl-LPC (18:2 LPC), arachidonoyl-LPC (20:4 LPC), and oleoyl-LPC (18:1 LPC) as the most prominent LPC species generated by the action of endothelial lipase (EL) on high-density lipoprotein. In the present study, the impact of those LPC on prostacyclin (PGI(2)) production was examined in vitro in primary human aortic endothelial cells (HAEC) and in vivo in mice. Although 18:2 LPC was inactive, 16:0, 18:1, and 20:4 LPC induced PGI(2) production in HAEC by 1.4-, 3-, and 8.3-fold, respectively. LPC-elicited 6-keto PGF1α formation depended on both cyclooxygenase (COX)-1 and COX-2 and on the activity of cytosolic phospholipase type IVA (cPLA2). The LPC-induced, cPLA2-dependent (14)C-arachidonic acid (AA) release was increased 4.5-fold with 16:0, 2-fold with 18:1, and 2.7-fold with 20:4 LPC, respectively, and related to the ability of LPC to increase cytosolic Ca(2+) concentration. In vivo, LPC increased 6-keto PGF(1α) concentration in mouse plasma with a similar order of potency as found in HAEC. Our results indicate that the tested LPC species are capable of eliciting production of PGI(2), whereby the efficacy and the relative contribution of underlying mechanisms are strongly related to acyl-chain length and degree of saturation.
Find related publications in this database (using NLM MeSH Indexing)
Animals -
Cells, Cultured -
Cyclooxygenase 2 - genetics
Endothelium, Vascular - metabolism
Epoprostenol - biosynthesis
Humans -
Lysophosphatidylcholines - pharmacology
Male -
Mice -
Mice, Inbred C57BL -
RNA, Messenger - metabolism

Find related publications in this database (Keywords)
cyclooxygenase
prostanoids
calcium
phospholipase A2
endothelial cell
arachidonic acid
© Meduni Graz Impressum