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Total Synthesis of the Lipid Mediator PD1(n-3 DPA): Configurational Assignments and Anti-inflammatory and Pro-resolving Actions
[Image: see text] The polyunsaturated lipid mediator PD1(n-3 DPA) (5) was recently isolated from self-resolving inflammatory exudates of 5 and human macrophages. Herein, the first total synthesis of PD1(n-3 DPA) (5) is reported in 10 steps and 9% overall yield. These efforts, together with NMR data...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society and American
Society of Pharmacognosy
2014
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4000582/ https://www.ncbi.nlm.nih.gov/pubmed/24576195 http://dx.doi.org/10.1021/np4009865 |
Sumario: | [Image: see text] The polyunsaturated lipid mediator PD1(n-3 DPA) (5) was recently isolated from self-resolving inflammatory exudates of 5 and human macrophages. Herein, the first total synthesis of PD1(n-3 DPA) (5) is reported in 10 steps and 9% overall yield. These efforts, together with NMR data of its methyl ester 6, confirmed the structure of 5 to be (7Z,10R,11E,13E,15Z,17S,19Z)-10,17-dihydroxydocosa-7,11,13,15,19-pentaenoic acid. The proposed biosynthetic pathway, with the involvement of an epoxide intermediate, was supported by results from trapping experiments. In addition, LC-MS/MS data of the free acid 5, obtained from hydrolysis of the synthetic methyl ester 6, matched data for the endogenously produced biological material. The natural product PD1(n-3 DPA) (5) demonstrated potent anti-inflammatory properties together with pro-resolving actions stimulating human macrophage phagocytosis and efferocytosis. These results contribute new knowledge on the n-3 DPA structure–function of the growing numbers of specialized pro-resolving lipid mediators and pathways. |
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