Evidence map›Paper›PMID 20932325›Full record

ArticleBMC physiology2010

Identification of differences in human and great ape phytanic acid metabolism that could influence gene expression profiles and physiological functions.

Paul A Watkins, Ann B Moser, Cicely B Toomer, Steven J Steinberg, Hugo W Moser, Mazen W Karaman, Krishna Ramaswamy, Kimberly D Siegmund, D Rick Lee, John J Ely and 2 more

Open access · hybridAbstract readComparative Study
In one paragraph

Article in BMC physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.1field-weighted citation impact, top 25% 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

17 citing papers in PubMed, 44 citations in OpenAlex.

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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

12 authors at 5 institutions in 1 country.

Paul A WatkinsDepartment ofNeurology, Johns Hopkins University School of Medicine, Hugo W Moser Research Institute at Kennedy Krieger, Baltimore, MD 21205, USA.
Ann B Moser
Cicely B Toomer
Steven J Steinberg
Hugo W Moser
Mazen W Karaman
Krishna Ramaswamy
Kimberly D Siegmund
D Rick Lee
John J Ely
Oliver A Ryder
Joseph G Hacia
Johns Hopkins University · USUniversity of Southern California · USNew Mexico State University Alamogordo · USKennedy Krieger Institute · USZoological Society of San Diego · US

Funding

NICHD MENTAL RETARDATION RESEARCH CENTER CORE GRANTP30HD024061 · NICHD · KENNEDY KRIEGER CHILDRENS HOSPITAL · PI VALLE, DAVID · 1988 to 2013
$15.8M
RNA Programmed Translation RecodingR01GM072447 · NIGMS · UNIVERSITY OF WISCONSIN-MADISON · PI BUTCHER, SAMUEL E · 2005 to 2016
$2.6M
Comparative Genomics of Peroxisomal Lipid MetabolismR01GM072477 · NIGMS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI HACIA, JOSEPH G · 2005 to 2009
$1.8M
NICHD NIH HHS HD24061NIGMS NIH HHS GM072447NIGMS NIH HHS R01 GM072477
6 · The paper itself

Abstract

backgroundIt has been proposed that anatomical differences in human and great ape guts arose in response to species-specific diets and energy demands. To investigate functional genomic consequences of these differences, we compared their physiological levels of phytanic acid, a branched chain fatty acid that can be derived from the microbial degradation of chlorophyll in ruminant guts. Humans who accumulate large stores of phytanic acid commonly develop cerebellar ataxia, peripheral polyneuropathy, and retinitis pigmentosa in addition to other medical conditions. Furthermore, phytanic acid is an activator of the PPAR-alpha transcription factor that influences the expression of genes relevant to lipid metabolism.

resultsDespite their trace dietary phytanic acid intake, all great ape species had elevated red blood cell (RBC) phytanic acid levels relative to humans on diverse diets. Unlike humans, chimpanzees showed sexual dimorphism in RBC phytanic acid levels, which were higher in males relative to females. Cultured skin fibroblasts from all species had a robust capacity to degrade phytanic acid. We provide indirect evidence that great apes, in contrast to humans, derive significant amounts of phytanic acid from the hindgut fermentation of plant materials. This would represent a novel reduction of metabolic activity in humans relative to the great apes.

conclusionWe identified differences in the physiological levels of phytanic acid in humans and great apes and propose this is causally related to their gut anatomies and microbiomes. Phytanic acid levels could contribute to cross-species and sex-specific differences in human and great ape transcriptomes, especially those related to lipid metabolism. Based on the medical conditions caused by phytanic acid accumulation, we suggest that differences in phytanic acid metabolism could influence the functions of human and great ape nervous, cardiovascular, and skeletal systems.

Indexed as

AnimalsErythrocytesFemaleGene ExpressionGorilla gorillaHominidaeHumansIntestinesMalePan paniscusPan troglodytesPhytanic AcidPongo pygmaeusPhytanic Acid

Identifiers

PMID20932325
PMCPMC2964658
OpenAlexW1995346208

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.