Evidence map›Paper›PMID 31434800›Full record

ArticleJCI insight2019

Human PNPLA3-I148M variant increases hepatic retention of polyunsaturated fatty acids.

Panu K Luukkonen, Auli Nick, Maarit Hölttä-Vuori, Christoph Thiele, Elina Isokuortti, Susanna Lallukka-Brück, You Zhou, Antti Hakkarainen, Nina Lundbom, Markku Peltonen and 6 more

Open access · goldAbstract read
In one paragraph

Article in JCI insight, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed
11.0field-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

88 citing papers in PubMed, 154 citations in OpenAlex.

  1. Article
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  14. Article
  15. Gene-based therapies for steatotic liver disease.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Review
  16. Article
  17. Liver lipid droplet cholesterol content is a key determinant of metabolic dysfunction-associated steatohepatitis.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  18. Article
  19. Experimental Models to Investigate PNPLA3 in Liver Steatosis.Liver international : official journal of the International Association for the Study of the Liver · 2025
    Review
  20. Targeting PNPLA3 to Treat MASH and MASH Related Fibrosis and Cirrhosis.Liver international : official journal of the International Association for the Study of the Liver · 2025
    Review

28 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

16 authors at 8 institutions in 4 countries.

Panu K LuukkonenMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Auli NickMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Maarit Hölttä-VuoriMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Christoph ThieleLIMES Institute, Bonn University, Bonn, Germany.
Elina IsokuorttiMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Susanna Lallukka-BrückMinerva Foundation Institute for Medical Research, Helsinki, Finland.
You ZhouMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Antti HakkarainenDepartment of Radiology, HUS Medical Imaging Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Nina LundbomDepartment of Radiology, HUS Medical Imaging Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Markku PeltonenDepartment of Public Health Solutions, National Institute for Health and Welfare, Helsinki, Finland.
Marju Orho-MelanderDepartment of Clinical Sciences, Lund University, Malmö, Sweden.
Matej OrešičTurku Centre for Biotechnology, University of Turku and Åbo Akademi University, Turku, Finland.
Tuulia HyötyläinenDepartment of Chemistry, Örebro University, Örebro, Sweden.
Leanne HodsonOxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, United Kingdom.
Elina IkonenMinerva Foundation Institute for Medical Research, Helsinki, Finland.
Hannele Yki-JärvinenMinerva Foundation Institute for Medical Research, Helsinki, Finland.
University of Helsinki · FIÅbo Akademi University · FIFinnish Institute for Health and Welfare · FILund University · SEMinerva Foundation · FIÖrebro University · SEUniversity of Bonn · DEUniversity of Oxford · GB

Funding

British Heart Foundation FS/15/56/31645
6 · The paper itself

Abstract

The common patatin-like phospholipase domain-containing protein 3 (PNPLA3) variant I148M predisposes to nonalcoholic liver disease but not its metabolic sequelae. We compared the handling of labeled polyunsaturated fatty acids (PUFAs) and saturated fatty acids (SFA) in vivo in humans and in cells harboring different PNPLA3 genotypes. In 148M homozygous individuals, triglycerides (TGs) in very low-density lipoproteins (VLDL) were depleted of PUFAs both under fasting and postprandial conditions compared with 148I homozygotes, and the PUFA/SFA ratio in VLDL-TGs was lower relative to the chylomicron precursor pool. In human PNPLA3-148M and PNPLA3-KO cells, PUFA but not SFA incorporation into TGs was increased at the expense of phosphatidylcholines, and under lipolytic conditions, PUFA-containing diacylglycerols (DAGs) accumulated compared with PNPLA3-148I cells. Polyunsaturated TGs were increased, while phosphatidylcholines (PCs) were decreased in the human liver in 148M homozygous individuals as compared with 148I homozygotes. We conclude that human PNPLA3-I148M is a loss-of-function allele that remodels liver TGs in a polyunsaturated direction by impairing hydrolysis/transacylation of PUFAs from DAGs to feed phosphatidylcholine synthesis.

Indexed as

AcyltransferasesAdolescentAdultCell LineCell Line, TumorCholesterol, VLDLFatty AcidsFatty Acids, UnsaturatedFemaleHeterozygoteHumansLipaseLiverLoss of Function MutationMaleMembrane ProteinsAcyltransferasesCholesterol, VLDLFatty AcidsFatty Acids, UnsaturatedLipaseMembrane ProteinsPhospholipases A2, Calcium-IndependentPNPLA3 protein, humanTriglyceridesGenetic variationHepatitisHepatologyMetabolism

Identifiers

PMID31434800
PMCPMC6777808
OpenAlexW2969632049

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.