Evidence map›Paper›PMID 19540098›Full record

ArticleProstaglandins, leukotrienes, and essential fatty acids

Can the rat liver maintain normal brain DHA metabolism in the absence of dietary DHA?

Stanley I Rapoport, Miki Igarashi

Abstract read
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Article in Prostaglandins, leukotrienes, and essential fatty acids. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
–field-weighted citation impact
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

31 citing papers in PubMed.

  1. Article
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  5. Lipids and Alzheimer's Disease.International journal of molecular sciences · 2020
    Review
  6. Article
  7. Fatty acid transporting proteins: Roles in brain development, aging, and stroke.Prostaglandins, leukotrienes, and essential fatty acids · 2018
    Review
  8. Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Towards a whole-body systems [multi-organ] lipidomics in Alzheimer's disease.Prostaglandins, leukotrienes, and essential fatty acids · 2011
    Review
  20. Review
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

2 authors.

Stanley I RapoportBrain Physiology and Metabolism Section, National Institute on Aging, National Institutes of Health, Building 9, Room 1S128, 9000 Rockville Pike, Bethesda, MD 20892, USA. sir@helix.nih.gov
Miki Igarashi

Funding

Lipid Nutrition and the BrainZIAAG000399 · NIA · NATIONAL INSTITUTE ON AGING · PI RAPOPORT, STANLEY I. · 2009 to 2014
$3.7M
Intramural NIH HHS ZIA AG000399
6 · The paper itself

Abstract

backgroundDocosahexaenoic acid (DHA) is required for normal brain function. The concentration of DHA in the brain depends on both diet and liver metabolism.

objectiveTo determine rat brain DHA concentration and consumption in relation to dietary n-3 (omega-3) polyunsaturated fatty acid (PUFA) content and liver secretion of DHA derived from circulating alpha-linolenic acid (alpha-LNA).

designFollowing weaning, male rats were fed for 15 weeks either: (1) a diet with a high DHA and alpha-LNA content, (2) an n-3 PUFA "adequate" diet containing 4.6% alpha-LNA but no DHA, or (3) an n-3 PUFA "deficient" diet containing 0.2% alpha-LNA and no DHA. Brain DHA consumption rates were measured following intravenous infusion in unanesthetized rats of [1-14C]DHA, whereas liver and brain DHA synthesis rates were measured by infusing [1-14C]alpha-LNA.

resultsBrain DHA concentrations equaled 17.6, 11.4 and 7.14 microm/g in rats on diets 1, 2 and 3, respectively. With each diet, the rate of brain DHA synthesis from alpha-LNA was much less than the brain DHA consumption rate, whereas the liver synthesis-secretion rate was 5-10 fold higher. Higher elongase 2 and 5 and desaturase Delta5 and Delta6 activities in liver than in brain accounted for the higher liver DHA synthesis rates. Furthermore, these enzymes were transcriptionally upregulated in liver but not in brain of rats fed the deficient diet.

conclusionsWhile DHA is essential to normal brain function, this need might be covered by dietary alpha-LNA when liver metabolic conversion machinery is intact and the diet has a high alpha-LNA content.

Indexed as

alpha-Linolenic AcidAnimalsBrainDietDocosahexaenoic AcidsFatty Acids, Omega-3Fatty Acids, UnsaturatedLiverMaleRatsalpha-Linolenic AcidDocosahexaenoic AcidsFatty Acids, Omega-3Fatty Acids, Unsaturated

Identifiers

PMID19540098
PMCPMC2967256

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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.