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Published on: November 28, 2015
Nitroalkenes: synthesis, characterization, and effects on macrophage activation
Ana María Ferreira1, Andrés Trostchansky, Mariana Ferrari
1Department of Immunology, Facultadas de Ciencias y Química, Universidad de la República, Uruguay.
Nitroalkenes, novel cell signaling mediators found in human plasma, are generated during inflammation. These lipid nitration products help downregulate inflammatory responses by modulating macrophage activity.
Area of Science:
- Biochemistry
- Cell Biology
- Immunology
Background:
- Nitroalkenes derived from unsaturated fatty acids are present in human plasma and tissues.
- Lipid nitration is an adaptive response to pro-inflammatory stimuli, downregulating inflammation.
- Nitroalkenes act as novel pluripotent cell signaling mediators.
Purpose of the Study:
- To characterize the generation and biological effects of nitroalkenes.
- To investigate the role of nitroalkenes in macrophage activation and inflammatory responses.
- To elucidate the signaling pathways involved in nitroalkene-mediated anti-inflammatory actions.
Main Methods:
- Synthesis and characterization of esterified (cholesteryl-nitrolinoleate, CLNO2) and free (nitroarachidonate, AANO2) nitroalkenes.
- Determination of cholesteryl linoleic acid nitration during macrophage activation.
- Examination of nitroalkene effects on inducible enzyme expression in activated macrophages.
- Discussion of signaling pathways mediating anti-inflammatory effects.
Main Results:
- Nitroalkenes are generated during macrophage activation.
- Nitroalkenes modulate the expression of inducible enzymes in activated macrophages.
- Nitroalkenes exhibit anti-inflammatory actions through specific signaling pathways.
Conclusions:
- Nitroalkenes are key mediators in the inflammatory response.
- Lipid nitration represents an endogenous mechanism for inflammation control.
- Further research into nitroalkene signaling pathways could yield novel therapeutic strategies.
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