Evidence map›Paper›PMID 25512002›Full record

ArticleHuman mutation2015

Loss of function variants in human PNPLA8 encoding calcium-independent phospholipase A2 γ recapitulate the mitochondriopathy of the homologous null mouse.

Carol J Saunders, Sung Ho Moon, Xinping Liu, Isabelle Thiffault, Keith Coffman, Jean-Baptiste LePichon, Eugenio Taboada, Laurie D Smith, Emily G Farrow, Neil Miller and 4 more

Erratum issuedOpen access · greenAbstract read
In one paragraph

Article in Human mutation, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

23 citing papers in PubMed, 45 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. The PNPLA family of enzymes: characterisation and biological role.Arhiv za higijenu rada i toksikologiju · 2023
    Article
  10. Article
  11. Article
  12. Current Knowledge on Mammalian Phospholipase AMolecules (Basel, Switzerland) · 2022
    Review
  13. Homozygous Missense Variation inMolecular syndromology · 2021
    Article
  14. Updating Phospholipase ABiomolecules · 2020
    Review
  15. Article
  16. Article
  17. Lipoquality control by phospholipase AProceedings of the Japan Academy. Series B, Physical and biological sciences · 2017
    Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

14 authors at 2 institutions in 1 country.

Carol J SaundersCenter for Pediatric Genomic Medicine, Children's Mercy Hospitals, Kansas City, Missouri.
Sung Ho Moon
Xinping Liu
Isabelle Thiffault
Keith Coffman
Jean-Baptiste LePichon
Eugenio Taboada
Laurie D Smith
Emily G Farrow
Neil Miller
Margaret Gibson
Melanie Patterson
Stephen F Kingsmore
Richard W Gross
Children's Mercy Hospital · USWashington University in St. Louis · US

Funding

WU P&FP30DK020579 · NIDDK · WASHINGTON UNIVERSITY · PI Clay F. Semenkovich · 2013 to 2026
$27.1M
REGULATION OF MYOCARDIAL PHOSPHOLIPASES AND LIPASES IN DIABETIC MYOCARDIUMR01HL118639 · NHLBI · WASHINGTON UNIVERSITY · PI GROSS, RICHARD W · 2013 to 2025
$9.1M
NHLBI NIH HHS R01 HL118639NIDDK NIH HHS P30 DK020579
6 · The paper itself

Abstract

Mitochondriopathies are a group of clinically heterogeneous genetic diseases caused by defects in mitochondrial metabolism, bioenergetic efficiency, and/or signaling functions. The large majority of proteins involved in mitochondrial function are encoded by nuclear genes, with many yet to be associated with human disease. We performed exome sequencing on a young girl with a suspected mitochondrial myopathy that manifested as progressive muscle weakness, hypotonia, seizures, poor weight gain, and lactic acidosis. She was compound heterozygous for two frameshift mutations, p.Asn112HisfsX29 and p.Leu659AlafsX4, in the PNPLA8 gene, which encodes mitochondrial calcium-independent phospholipase A2 γ (iPLA2 γ). Western blot analysis of affected muscle displayed the absence of PNPLA8 protein. iPLA2 s are critical mediators of a variety of cellular processes including growth, metabolism, and lipid second messenger generation, exerting their functions through catalyzing the cleavage of the acyl groups in glycerophospholipids. The clinical presentation, muscle histology and the mitochondrial ultrastructural abnormalities of this proband are highly reminiscent of Pnpla8 null mice. Although other iPLA2 -related diseases have been identified, namely, infantile neuroaxonal dystrophy and neutral lipid storage disease with myopathy, this is the first report of PNPLA8-related disease in a human. We suggest PNPLA8 join the increasing list of human genes involved in lipid metabolism associated with neuromuscular diseases due to mitochondrial dysfunction.

Indexed as

AnimalsCalciumChildFemaleGroup IV Phospholipases A2HumansMiceMice, KnockoutMitochondriaProtein IsoformsCalciumGroup IV Phospholipases A2Protein Isoformsdystoniamitochondrial dysfunctionphospholipasePNPLA8

Identifiers

PMID25512002
PMCPMC4361307
OpenAlexW2067660309

What OpenQuestion holds

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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.