Polyunsaturated fatty acid biosynthesis pathway determines ferroptosis sensitivity in gastric cancer

Ji Yoon Lee, Miso Nam, Hye Young Son, Kwangbeom Hyun, Seo Young Jang, Jong Woo Kim, Min Wook Kim, Youngae Jung, Eunji Jang, Seon Jin Yoon, Jungeun Kim, Jihye Kim, Jinho Seo, Jeong Ki Min, Kyoung Jin Oh, Baek Soo Han, Won Kon Kim, Kwang Hee Bae, Jaewhan Song, Jaehoon KimYong Min Huh, Geum Sook Hwang, Eun Woo Lee, Sang Chul Lee

Research output: Contribution to journalArticlepeer-review

166 Citations (Scopus)

Abstract

Ferroptosis is an iron-dependent regulated necrosis mediated by lipid peroxidation. Cancer cells survive under metabolic stress conditions by altering lipid metabolism, which may alter their sensitivity to ferroptosis. However, the association between lipid metabolism and ferroptosis is not completely understood. In this study, we found that the expression of elongation of very longchain fatty acid protein 5 (ELOVL5) and fatty acid desaturase 1 (FADS1) is up-regulated in mesenchymal-type gastric cancer cells (GCs), leading to ferroptosis sensitization. In contrast, these enzymes are silenced by DNA methylation in intestinal-type GCs, rendering cells resistant to ferroptosis. Lipid profiling and isotope tracing analyses revealed that intestinal-type GCs are unable to generate arachidonic acid (AA) and adrenic acid (AdA) from linoleic acid. AA supplementation of intestinal-type GCs restores their sensitivity to ferroptosis. Based on these data, the polyunsaturated fatty acid (PUFA) biosynthesis pathway plays an essential role in ferroptosis; thus, this pathway potentially represents a marker for predicting the efficacy of ferroptosis-mediated cancer therapy.

Original languageEnglish
Pages (from-to)32433-32442
Number of pages10
JournalProceedings of the National Academy of Sciences of the United States of America
Volume117
Issue number51
DOIs
Publication statusPublished - 2020 Dec 22

Bibliographical note

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© 2020 National Academy of Sciences. All rights reserved.

All Science Journal Classification (ASJC) codes

  • General

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