Co-administration of propionate or protocatechuic acid does not affect dha-specific transcriptional effects on lipid metabolism in cultured hepatic cells

Francesca Danesi*, Bjørk D. Larsen*, Mattia Di Nunzio*, Ronni Nielsen*, Dario de Biase*, Veronica Valli*, Susanne Mandrup*, Alessandra Bordoni*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Long-chain n-3 polyunsaturated fatty acids (n-3 LC-PUFAs) are collectively recognized triglyceride-lowering agents, and their preventive action is likely mediated by changes in gene expression. However, as most studies employ fish oil, which contains a mixture of n-3 LC-PUFAs, the docosahexaenoic acid (DHA)-specific transcriptional effects on lipid metabolism are still unclear. The aim of the present study was to further elucidate the DHA-induced transcriptional effects on lipid metabolism in the liver, and to investigate the effects of co-administration with other bioactive compounds having effects on lipid metabolism. To this purpose, HepG2 cells were treated for 6 or 24 h with DHA, the short-chain fatty acid propionate (PRO), and protocatechuic acid (PCA), the main human metabolite of cyanidin-glucosides. Following supplementation, we mapped the global transcriptional changes. PRO and PCA alone had a very slight effect on the transcriptome; on the contrary, supplementation of DHA highly repressed the steroid and fatty acid biosynthesis pathways, this transcriptional modulation being not affected by co-supplementation. Our results confirm that DHA effect on lipid metabolism are mediated at least in part by modulation of the expression of specific genes. PRO and PCA could contribute to counteracting dyslipidemia through other mechanisms.

Original languageEnglish
Article number2952
JournalNutrients
Volume12
Issue number10
Number of pages12
ISSN2072-6643
DOIs
Publication statusPublished - 2020

Keywords

  • 3,4-dihydroxybenzoic acid
  • Bioactives
  • DHA
  • Docosahexaenoic acid
  • Fatty acid synthesis
  • HepG2
  • Propionic acid
  • RNA sequencing
  • Steroid synthesis
  • Transcriptomics

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