Apocryphal FADS2 activity promotes fatty acid diversification in cancer.

Young, Reuben S E; Bowman, Andrew P; Williams, Elizabeth D; Tousignant, Kaylyn D; Bidgood, Charles L; Narreddula, Venkateswara R; Gupta, Rajesh; Marshall, David L; Poad, Berwyck L J; Nelson, Colleen C; Ellis, Shane R; Heeren, Ron M A; Sadowski, Martin C; Blanksby, Stephen J (2021). Apocryphal FADS2 activity promotes fatty acid diversification in cancer. Cell reports, 34(6), p. 108738. Cell Press 10.1016/j.celrep.2021.108738

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Canonical fatty acid metabolism describes specific enzyme-substrate interactions that result in products with well-defined chain lengths, degree(s), and positions of unsaturation. Deep profiling of lipids across a range of prostate cancer cell lines reveals a variety of fatty acids with unusual site(s) of unsaturation that are not described by canonical pathways. The structure and abundance of these unusual lipids correlate with changes in desaturase expression and are strong indicators of cellular phenotype. Gene silencing and stable isotope tracing demonstrate that direct Δ6 and Δ8 desaturation of 14:0 (myristic), 16:0 (palmitic), and 18:0 (stearic) acids by FADS2 generate new families of unsaturated fatty acids (including n-8, n-10, and n-12) that have rarely-if ever-been reported in human-derived cells. Isomer-resolved lipidomics reveals the selective incorporation of these unusual fatty acids into complex structural lipids and identifies their presence in cancer tissues, indicating functional roles in membrane structure and signaling.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Pathology

UniBE Contributor:

Sadowski, Martin

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

2211-1247

Publisher:

Cell Press

Language:

English

Submitter:

Christa Hagert

Date Deposited:

06 Dec 2021 10:30

Last Modified:

06 Dec 2021 10:39

Publisher DOI:

10.1016/j.celrep.2021.108738

PubMed ID:

33567271

Uncontrolled Keywords:

desaturase elongase fatty acids imaging isomer lipids mass spectrometry metabolism prostate cancer unsaturation

BORIS DOI:

10.48350/161785

URI:

https://boris.unibe.ch/id/eprint/161785

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