Cytochrome P450 monooxygenase lipid metabolites are significant second messengers in the resolution of choroidal neovascularization

Eiichi Hasegawa, Saori Inafuku, Lama Mulki, Yoko Okunuki, Ryoji Yanai, Kaylee E. Smith, Clifford B. Kim, Garrett Klokman, Diane R. Bielenberg, Narender Puli, John R. Falck, Deeba Husain, Joan W. Miller, Matthew L. Edin, Darryl C. Zeldin, Kin Sing Stephen Lee, Bruce D. Hammock, Wolf Hagen Schunck, Kip M. Connor

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Age-related macular degeneration (AMD) is the most common cause of blindness for individuals age 50 and above in the developed world. Abnormal growth of choroidal blood vessels, or choroidal neovascularization (CNV), is a hallmark of the neovascular (wet) form of advanced AMD and leads to significant vision loss. A growing body of evidence supports a strong link between neovascular disease and inflammation. Metabolites of long-chain polyunsaturated fatty acids derived from the cytochrome P450 (CYP) monooxygenase pathway serve as vital second messengers that regulate a number of hormones and growth factors involved in inflammation and vascular function. Using transgenic mice with altered CYP lipid biosynthetic pathways in a mouse model of laser-induced CNV, we characterized the role of these lipid metabolites in regulating neovascular disease. We discovered that the CYP-derived lipid metabolites epoxydocosapentaenoic acids (EDPs) and epoxyeicosatetraenoic acids (EEQs) are vital in dampening CNV severity. Specifically, overexpression of the monooxygenase CYP2C8 or genetic ablation or inhibition of the soluble epoxide hydrolase (sEH) enzyme led to increased levels of EDP and EEQ with attenuated CNV development. In contrast, when we promoted the degradation of these CYP-derived metabolites by transgenic overexpression of sEH, the protective effect against CNV was lost. We found that these molecules work in part through their ability to regulate the expression of key leukocyte adhesion molecules, on both leukocytes and endothelial cells, thereby mediating leukocyte recruitment. These results suggest that CYP lipid signaling molecules and their regulators are potential therapeutic targets in neovascular diseases.

Original languageEnglish (US)
Pages (from-to)E7545-E7553
JournalProceedings of the National Academy of Sciences of the United States of America
Volume114
Issue number36
DOIs
StatePublished - Sep 5 2017

Keywords

  • Choroidal neovascularization
  • Lipid metabolites
  • Omega-3 fatty acids
  • Oxylipin
  • P450

ASJC Scopus subject areas

  • General

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    Hasegawa, E., Inafuku, S., Mulki, L., Okunuki, Y., Yanai, R., Smith, K. E., Kim, C. B., Klokman, G., Bielenberg, D. R., Puli, N., Falck, J. R., Husain, D., Miller, J. W., Edin, M. L., Zeldin, D. C., Lee, K. S. S., Hammock, B. D., Schunck, W. H., & Connor, K. M. (2017). Cytochrome P450 monooxygenase lipid metabolites are significant second messengers in the resolution of choroidal neovascularization. Proceedings of the National Academy of Sciences of the United States of America, 114(36), E7545-E7553. https://doi.org/10.1073/pnas.1620898114