Evidence map›Paper›PMID 27543786›Full record

ArticleFEBS letters2016

Metabolic fate of docosahexaenoic acid (DHA; 22:6n-3) in human cells: direct retroconversion of DHA to eicosapentaenoic acid (20:5n-3) dominates over elongation to tetracosahexaenoic acid (24:6n-3).

Hui Gyu Park, Peter Lawrence, Matthew G Engel, Kumar Kothapalli, James Thomas Brenna

Open access · bronzeAbstract readLetter
In one paragraph

Article in FEBS letters, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
5.0field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 44 citations in OpenAlex.

  1. Article
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  3. Article
  4. Article
  5. Review
  6. Article
  7. Tetracosahexaenoylethanolamide, a novelJournal of lipid research · 2020
    Article
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  9. Article
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  12. Review
  13. Review
  14. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Hui Gyu ParkDivision of Nutritional Sciences, Cornell University, Ithaca, NY, USA.
Peter LawrenceDivision of Nutritional Sciences, Cornell University, Ithaca, NY, USA.
Matthew G EngelDivision of Nutritional Sciences, Cornell University, Ithaca, NY, USA.
Kumar KothapalliDivision of Nutritional Sciences, Cornell University, Ithaca, NY, USA. ksk25@cornell.edu.
James Thomas BrennaDivision of Nutritional Sciences, Cornell University, Ithaca, NY, USA. jtb4@cornell.edu.
Cornell University · US

Funding

Molecular mechanism of omega-3 responseR01AT007003 · NCCIH · UNIVERSITY OF TEXAS AT AUSTIN · PI BRENNA, JAMES T. · 2013 to 2017
$1.9M
NCCIH NIH HHS R01 AT007003
6 · The paper itself

Abstract

Docosahexaenoic acid (22:6n-3) supplementation in humans causes eicosapentaenoic acid (20:5n-3) levels to rise in plasma, but not in neural tissue where 22:6n-3 is the major omega-3 in phospholipids. We determined whether neuronal cells (Y79 and SK-N-SH) metabolize 22:6n-3 differently from non-neuronal cells (MCF7 and HepG2). We observed that (13) C-labeled 22:6n-3 was primarily esterified into cell lipids. We also observed that retroconversion of 22:6n-3 to 20:5n-3 was 5- to 6-fold greater in non-neural compared to neural cells and that retroconversion predominated over elongation to tetracosahexaenoic acid (24:6n-3) by 2-5-fold. The putative metabolic intermediates, (13) C-labeled 22:5n-3 and (13) C-labeled 24:5n-3, were not detected in our assays. Analysis of the expression of enzymes involved in fatty acid beta-oxidation revealed that MCF7 cells abundantly expressed the mitochondrial enzymes CPT1A, ECI1, and DECR1, whereas the peroxisomal enzyme ACOX1 was abundant in HepG2 cells, thus suggesting that the initial site of 22:6n-3 oxidation depends on the cell type. Our data reveal that non-neural cells more actively metabolize 22:6n-3 to 20:5n-3 via channeled retroconversion, while neural cells retain 22:6n-3.

Indexed as

Carnitine O-PalmitoyltransferaseDocosahexaenoic AcidsDodecenoyl-CoA IsomeraseEicosapentaenoic AcidHep G2 CellsHumansMCF-7 CellsCarnitine O-PalmitoyltransferaseCPT1A protein, humanDocosahexaenoic AcidsDodecenoyl-CoA IsomeraseECI1 protein, humanEicosapentaenoic Acidtetracosahexaenoic aciddocosahexaenoic acideicosapentaenoic acidretroconversion

Identifiers

PMID27543786
PMCPMC5039098
OpenAlexW2508377611

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.