Gastric cancer depends on aldehyde dehydrogenase 3A1 for fatty acid oxidation.

Abstract:

:The major source of ATP in cancer cells remains unclear. Here, we examined energy metabolism in gastric cancer cells and found increased fatty acid oxidation and increased expression of ALDH3A1. Metabolic analysis showed that lipid peroxidation by reactive oxygen species led to spontaneous production of 4-hydroxynonenal, which was converted to fatty acids with NADH production by ALDH3A1, resulting in further fatty acid oxidation. Inhibition of ALDH3A1 by knock down using siRNA of ALDH3A1 resulted in significantly reduced ATP production by cancer cells, leading to apoptosis. Oxidative phosphorylation by mitochondria in gastric cancer cells was driven by NADH supplied via fatty acid oxidation. Therefore, blockade of ALDH3A1 together with mitochondrial complex I using gossypol and phenformin led to significant therapeutic effects in a preclinical gastric cancer model.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Lee JS,Kim SH,Lee S,Kang JH,Lee SH,Cheong JH,Kim SY

doi

10.1038/s41598-019-52814-1

subject

Has Abstract

pub_date

2019-11-08 00:00:00

pages

16313

issue

1

issn

2045-2322

pii

10.1038/s41598-019-52814-1

journal_volume

9

pub_type

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