Evidence map›Paper›PMID 9973282›Full record

ArticleAmerican journal of human genetics1999

De novo alu-element insertions in FGFR2 identify a distinct pathological basis for Apert syndrome.

M Oldridge, E H Zackai, D M McDonald-McGinn, S Iseki, G M Morriss-Kay, S R Twigg, D Johnson, S A Wall, W Jiang, C Theda and 2 more

Open access · bronzeAbstract readCase Reports
In one paragraph

Article in American journal of human genetics, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
8.3field-weighted citation impact, top 2% 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

73 citing papers in PubMed, 250 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Direct identification ofbioRxiv : the preprint server for biology · 2025
    Article
  5. PredictingbioRxiv : the preprint server for biology · 2024
    Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. A NovelHuman mutation · 2023
    Article
  11. Article
  12. Article
  13. Article
  14. Cleft Palate in Apert Syndrome.Journal of developmental biology · 2022
    Review
  15. Review
  16. Acne Syndromes and Mosaicism.Biomedicines · 2021
    Review
  17. Tripod-shaped Syndactyly in Apert Syndrome with FGFR2 p.P253R Mutation.Indian journal of plastic surgery : official publication of the Association of Plastic Surgeons of India · 2021
    Article
  18. Detection ofFrontiers in molecular biosciences · 2021
    Article
  19. Article
  20. Article

13 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

12 authors at 4 institutions in 3 countries.

M OldridgeInstitute of Molecular Medicine, John Radcliffe Hospital, Oxford, United Kingdom.
E H Zackai
D M McDonald-McGinn
S Iseki
G M Morriss-Kay
S R Twigg
D Johnson
S A Wall
W Jiang
C Theda
E W Jabs
A O Wilkie
John Radcliffe Hospital · GBJohns Hopkins University · USChildren's Hospital of Philadelphia · USUniversity of Oxford · GB

Funding

FIBROBLAST GROWTH FACTOR RECEPTORS IN CRANIOSYNOSTOSISR01DE011441 · NIDCR · JOHNS HOPKINS UNIVERSITY · PI JABS, ETHYLIN WANG · 1996 to 1999
–
NCRR NIH HHS RR00052NIDCR NIH HHS R01 DE11441Wellcome Trust
6 · The paper itself

Abstract

Apert syndrome, one of five craniosynostosis syndromes caused by allelic mutations of fibroblast growth-factor receptor 2 (FGFR2), is characterized by symmetrical bony syndactyly of the hands and feet. We have analyzed 260 unrelated patients, all but 2 of whom have missense mutations in exon 7, which affect a dipeptide in the linker region between the second and third immunoglobulin-like domains. Hence, the molecular mechanism of Apert syndrome is exquisitely specific. FGFR2 mutations in the remaining two patients are distinct in position and nature. Surprisingly, each patient harbors an Alu-element insertion of approximately 360 bp, in one case just upstream of exon 9 and in the other case within exon 9 itself. The insertions are likely to be pathological, because they have arisen de novo; in both cases this occurred on the paternal chromosome. FGFR2 is present in alternatively spliced isoforms characterized by either the IIIb (exon 8) or IIIc (exon 9) domains (keratinocyte growth-factor receptor [KGFR] and bacterially expressed kinase, respectively), which are differentially expressed in mouse limbs on embryonic day 13. Splicing of exon 9 was examined in RNA extracted from fibroblasts and keratinocytes from one patient with an Alu insertion and two patients with Pfeiffer syndrome who had nucleotide substitutions of the exon 9 acceptor splice site. Ectopic expression of KGFR in the fibroblast lines correlated with the severity of limb abnormalities. This provides the first genetic evidence that signaling through KGFR causes syndactyly in Apert syndrome.

Indexed as

Alu ElementsMutagenesis, InsertionalAcrocephalosyndactyliaAnimalsBase SequenceChildExtremitiesFemaleGene ExpressionGenomic ImprintingHumansMaleMiceMolecular Sequence DataPedigreeRadiographyFGFR2 protein, humanFgfr2 protein, mousekeratinocyte growth factor receptorReceptor, Fibroblast Growth Factor, Type 2Receptor Protein-Tyrosine KinasesReceptors, Fibroblast Growth FactorReceptors, Growth Factor

Identifiers

PMID9973282
PMCPMC1377754
OpenAlexW2035529654

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.