Evidence map›Paper›PMID 22444668›Full record

ArticleAmerican journal of human genetics2012

Maternal inheritance of a promoter variant in the imprinted PHLDA2 gene significantly increases birth weight.

Miho Ishida, David Monk, Andrew J Duncan, Sayeda Abu-Amero, Jiehan Chong, Susan M Ring, Marcus E Pembrey, Peter C Hindmarsh, John C Whittaker, Philip Stanier and 1 more

Open access · hybridAbstract read
In one paragraph

Article in American journal of human genetics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 4% 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, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

  1. Pooled it
  2. PHLDA2 in cancer: From molecular mechanisms to therapeutic opportunities.The Journal of pharmacology and experimental therapeutics · 2025
    Review
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Mining the literature for genes associated with placenta-mediated maternal diseases.AMIA ... Annual Symposium proceedings. AMIA Symposium · 2017
    Article
  9. Article
  10. Article
  11. Article
  12. Between Scylla and Charybdis: renegotiating resolution of the 'obstetric dilemma' in response to ecological change.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015
    Review
  13. The role and interaction of imprinted genes in human fetal growth.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015
    Review
  14. Article
  15. Article
  16. Article
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  18. Review
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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

11 authors at 3 institutions in 1 country.

Miho IshidaClinical and Molecular Genetics Unit, Institute of Child Health, University College London, London, UK.
David Monk
Andrew J Duncan
Sayeda Abu-Amero
Jiehan Chong
Susan M Ring
Marcus E Pembrey
Peter C Hindmarsh
John C Whittaker
Philip Stanier
Gudrun E Moore
University College London · GBUniversity of Bristol · GBUniversity of London · GB

Funding

Medical Research Council G0801438Medical Research Council G1001689Medical Research Council G9815508Wellcome Trust 092731
6 · The paper itself

Abstract

Birth weight is an important indicator of both perinatal and adult health, but little is known about the genetic factors contributing to its variability. Intrauterine growth restriction is a leading cause of perinatal morbidity and mortality and is also associated with adult disease. A significant correlation has been reported between lower birth weight and increased expression of the maternal PHLDA2 allele in term placenta (the normal imprinting pattern was maintained). However, a mechanism that explains the transcriptional regulation of PHLDA2 on in utero growth has yet to be described. In this study, we sequenced the PHLDA2 promoter region in 263 fetal DNA samples to identify polymorphic variants. We used a luciferase reporter assay to identify in the PHLDA2 promoter a 15 bp repeat sequence (RS1) variant that significantly reduces PHLDA2-promoter efficiency. RS1 genotyping was then performed in three independent white European normal birth cohorts. Meta-analysis of all three (total n = 9,433) showed that maternal inheritance of RS1 resulted in a significant 93 g increase in birth weight (p = 0.01; 95% confidence interval [CI] = 22-163). Moreover, when the mother was homozygous for RS1, the influence on birth weight was 155 g (p = 0.04; 95% CI = 9-300), which is a similar magnitude to the reduction in birth weight caused by maternal smoking.

Indexed as

Genomic ImprintingPromoter Regions, GeneticAdultBase SequenceBirth WeightFemaleFetusGenetic VariationHumansInfant, Low Birth WeightInfant, NewbornMaleMolecular Sequence DataNuclear ProteinsRepetitive Sequences, Nucleic AcidWhite PeopleNuclear ProteinsTSSC3 protein

Identifiers

PMID22444668
PMCPMC3322226
OpenAlexW2154705749

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.