Abstract
Drosophila melanogaster has been a widely used as a model system for its powerful genetic tools. However, it remains to be illustrated if Drosophila can be used to examine the biochemical and physiological metabolism of eicosanoids. Thus, the analysis on the metabolism of C20 polyunsaturated fatty acids (PUFA) in Drosophila was implemented with high performance liquid chromatography tandem mass spectrometry (UPLC–MS/MS). Fatty acid (FA) analysis of the whole body, head, and thorax-abdomen in Drosophila showed C20 PUFA could only be found in Drosophila fed diets supplemented with eicosapentaenoic acid (EPA) and arachidonic acid (ARA), but not in Drosophila fed base diets. The C20 PUFA were found in abundance in the head. Drosophila fed ARA- and EPA-supplemented diets yielded 15S-hydroxy-5Z,8Z,11Z,13E-eicosatetraenoic acid [15(S)-HETE] and 15S-hydroxy-5Z,8Z,11Z,13E,17Z-eicosapentaenoic acid [15(S)-HEPE], respectively, while other sampled eicosanoids could not be detected. Similar results were obtained by incubating fly tissue supplemented with ARA or EPA. Furthermore, a genome sequence scan indicated that no gene encoding the key enzymes synthesizing eicosanoids were found in Drosophila. These findings demonstrate that Drosophila may possess a special lipid metabolic system, which is different from mammals.
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Abbreviations
- ALA:
-
α-Linolenic acid (18:3n-3)
- ARA:
-
Arachidonic acid (20:4n-6)
- ALOX5:
-
Arachidonate 5-lipoxygenase
- ALOX12:
-
Arachidonate 12-lipoxygenase
- ALOX15:
-
Arachidonate 15-lipoxygenase
- ALOX15B:
-
Arachidonate 15-lipoxygenase B
- BHT:
-
Butylhydroxytoluol
- COX:
-
Cyclooxygenases
- CYP:
-
Cytochrome P450
- CYP2C8:
-
Cytochrome P450 2C8 isoform
- CYP2C9:
-
Cytochrome P450 2C9
- CYP4A11:
-
Cytochrome P450 4A11
- CYP4F3:
-
Leukotriene-B(4) omega-hydroxylase 2 isoform a
- CYP2J2:
-
Ytochrome P450 2J2
- GC:
-
Gas chromatography
- GSH:
-
Glutathione peroxidase
- EET:
-
Epoxyeicosatrienoic acid
- EPA:
-
Eicosapentaenoic acid (20:5n-3)
- ESI:
-
Electrospray ionization
- HETE:
-
Hydroxyeicosatetraenoic acid
- HPETE:
-
Hydroperoxyeicosatetraenoic acid
- HPLC–MS/MS:
-
High performance liquid chromatography tandem mass spectrometry
- LA:
-
Linoleic acid (18:2n-6)
- LC-MS:
-
Liquid chromatography–mass spectrometry
- LOD:
-
Limit of detection
- LOQ:
-
Limit of quantity
- LOX:
-
Lipoxygenases
- LT:
-
Leukotriene
- LTB4 :
-
Leukotriene B4
- MRM:
-
Multiple reactions monitoring
- PG:
-
Prostaglandins
- PGE3 :
-
Prostaglandin E3
- PGH2 :
-
Prostaglandin H2
- PGF3α :
-
Prostaglandin F3α
- PLA2 :
-
Phospholipase A2
- PUFA:
-
Polyunsaturated fatty acid
- PGF2α :
-
Prostaglandin F2α
- PGE2 :
-
Prostaglandin E2
- PGE2-d4:
-
9-Oxo-11α,15S-dihydroxy-prosta-5Z,13E-Dien-1-oic-3,3,4,4-d4 acid
- RSD:
-
Relative standard deviations
- TX:
-
Thromboxane
- 5(S)-HpETE:
-
5S-Hydroperoxy-6E,8Z,11Z,14Z-eicosatetraenoic acid
- 11(12)-EET:
-
(±)11(12)-Epoxy-5Z,8Z,14Z-eicosatrienoic acid
- 15(S)-HEPE:
-
15S-Hydroxy-5Z,8Z,11Z,13E,17Z-eicosapentaenoic acid
- 15(S)-HETE:
-
15S-Hydroxy-5Z,8Z,11Z,13E-eicosatetraenoic acid
- 15(S)-HETE-d8 :
-
Techin
- 15(S)-HpEPE:
-
15S-Hydroperoxy-5Z,8Z,11Z,13E,17Z-eicosapentaenoic acid
- 15(S)-HpETE:
-
15S-Hydroperoxy-5Z,8Z,11Z,13E-eicosatetraenoic acid
- 17(18)-EpETE:
-
(±)17(18)-Epoxy-5Z,8Z,11Z,14Z-eicosatetraenoic acid
- 17,18-DiHETE:
-
17,18-Dihydroxy-5Z,8Z,11Z,14Z-eicosatetraenoic acid
- 20-HETE:
-
20-Hydroxy-5Z,8Z,11Z,14Z-eicosatetraenoic acid
- 20-HETE-d6 :
-
20-Hydroxy-5Z,8Z,11Z,14Z-eicosatetraenoic-16,16,17,17,18,18-d6 acid
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Acknowledgments
The present study was supported by grants from the National Natural Science Foundation of China (No. 31271848), the Important Scientific and Technical Innovation Project of Hangzhou (No. 20131812A25) and the Foundation of Fuli Institute of Food Science, Zhejiang University (No. KY201404). The authors wish to thank Prof Andrew J Sinclair, School of Medicine Deakin University, Australia, and Dr. Chao-Qiang Lai, JM-USDA Human Nutrition Research Center on Aging at Tufts University, United States for revising the manuscript, Prof Guonian Zhu and Dr. Mei Yang, College of Agriculture and Biotechnology, Zhejiang University, for providing equipment of UPLC–MS/MS and technical assistance.
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Tan, L., Xin, X., Zhai, L. et al. Drosophila Fed ARA and EPA Yields Eicosanoids, 15S-Hydroxy-5Z,8Z, 11Z, 13E-Eicosatetraenoic Acid, and 15S-Hydroxy-5Z,8Z,11Z,13E,17Z-Eicosapentaenoic Acid. Lipids 51, 435–449 (2016). https://doi.org/10.1007/s11745-016-4131-3
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DOI: https://doi.org/10.1007/s11745-016-4131-3