Caveolin-1-mediated sphingolipid oncometabolism underlies a metabolic vulnerability of prostate cancer.

Abstract:

:Plasma and tumor caveolin-1 (Cav-1) are linked with disease progression in prostate cancer. Here we report that metabolomic profiling of longitudinal plasmas from a prospective cohort of 491 active surveillance (AS) participants indicates prominent elevations in plasma sphingolipids in AS progressors that, together with plasma Cav-1, yield a prognostic signature for disease progression. Mechanistic studies of the underlying tumor supportive onco-metabolism reveal coordinated activities through which Cav-1 enables rewiring of cancer cell lipid metabolism towards a program of 1) exogenous sphingolipid scavenging independent of cholesterol, 2) increased cancer cell catabolism of sphingomyelins to ceramide derivatives and 3) altered ceramide metabolism that results in increased glycosphingolipid synthesis and efflux of Cav-1-sphingolipid particles containing mitochondrial proteins and lipids. We also demonstrate, using a prostate cancer syngeneic RM-9 mouse model and established cell lines, that this Cav-1-sphingolipid program evidences a metabolic vulnerability that is targetable to induce lethal mitophagy as an anti-tumor therapy.

journal_name

Nat Commun

journal_title

Nature communications

authors

Vykoukal J,Fahrmann JF,Gregg JR,Tang Z,Basourakos S,Irajizad E,Park S,Yang G,Creighton CJ,Fleury A,Mayo J,Paulucci-Holthauzen A,Dennison JB,Murage E,Peterson CB,Davis JW,Kim J,Hanash S,Thompson TC

doi

10.1038/s41467-020-17645-z

subject

Has Abstract

pub_date

2020-08-27 00:00:00

pages

4279

issue

1

issn

2041-1723

pii

10.1038/s41467-020-17645-z

journal_volume

11

pub_type

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