Evidence map›Paper›PMID 18060754›Full record

ArticleProstaglandins, leukotrienes, and essential fatty acids

Brain metabolism of nutritionally essential polyunsaturated fatty acids depends on both the diet and the liver.

Stanley I Rapoport, Jagadeesh S Rao, Miki Igarashi

Open access · greenAbstract read
In one paragraph

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 111 papers.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed
15.5field-weighted citation impact, top 1% 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

111 citing papers in PubMed, 285 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Trial
  4. The Emerging Parkinson's Disease Oxylipin-Ome.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
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  10. Review
  11. Article
  12. Mental health in society's margins: poorThe British journal of nutrition · 2024
    Article
  13. Article
  14. Large-Scale Population-Based Studies of Blood Metabolome and Brain Health.Current topics in behavioral neurosciences · 2024
    Review
  15. The Role of Hemp (Foods (Basel, Switzerland) · 2023
    Review
  16. Promising Sources of Plant-Derived Polyunsaturated Fatty Acids: A Narrative Review.International journal of environmental research and public health · 2023
    Review
  17. Review
  18. Article
  19. Article
  20. Article

51 more citing papers are in PubMed but not listed here.

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

3 authors at 2 institutions in 1 country.

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
Jagadeesh S Rao
Miki Igarashi
Institute on Aging · USNational Institutes of Health · US

Funding

Lipid Nutrition and the BrainZ01AG000399 · NIA · NATIONAL INSTITUTE ON AGING · PI RAPOPORT, STANLEY I. · 2005 to 2008
$1.2M
Intramural NIH HHS Z99 AG999999
6 · The paper itself

Abstract

Plasma alpha-linolenic acid (alpha-LNA, 18:3n-3) and linoleic acid (LA, 18:2n-6) do not contribute significantly to the brain content of docosahexaenoic acid (DHA, 22:6n-3) or arachidonic acid (AA, 20:4n-6), respectively, and neither DHA nor AA can be synthesized de novo in vertebrate tissue. Therefore, measured rates of incorporation of circulating DHA and AA into brain exactly represent their rates of consumption by brain. Positron emission tomography (PET) has been used to show, based on this information, that the adult human brain consumes AA and DHA at rates of 17.8 and 4.6 mg/day, respectively, and that AA consumption does not change significantly with age. In unanesthetized adult rats fed an n-3 PUFA "adequate" diet containing 4.6% alpha-LNA (of total fatty acids) as its only n-3 PUFA, the rate of liver synthesis of DHA was more than sufficient to maintain brain DHA, whereas the brain's rate of DHA synthesis is very low and unable to do so. Reducing dietary alpha-LNA in the DHA-free diet led to upregulation of liver but not brain coefficients of alpha-LNA conversion to DHA and of liver expression of elongases and desaturases that catalyze this conversion. Concurrently, brain DHA loss slowed due to downregulation of several of its DHA-metabolizing enzymes. Dietary alpha-LNA deficiency also promoted accumulation of brain docosapentaenoic acid (22:5n-6), and upregulated expression of AA-metabolizing enzymes, including cytosolic and secretory phospholipases A(2) and cyclooxygenase-2. These changes, plus reduced levels of brain derived neurotrophic factor (BDNF) and cAMP response element-binding protein (CREB) in n-3 PUFA diet deficient rats, likely render their brain more vulnerable to neuropathological insults.

Indexed as

AnimalsBrainBrain-Derived Neurotrophic FactorCyclic AMP Response Element-Binding ProteinDietary FatsDocosahexaenoic AcidsFatty Acids, EssentialFatty Acids, Omega-3Fatty Acids, UnsaturatedHumansLiverModels, BiologicalPhospholipidsRatsBrain-Derived Neurotrophic FactorCyclic AMP Response Element-Binding ProteinDietary FatsDocosahexaenoic AcidsFatty Acids, EssentialFatty Acids, Omega-3Fatty Acids, UnsaturatedPhospholipids

Identifiers

PMID18060754
PMCPMC2725409
OpenAlexW2089100905

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.