Evidence map›Paper›PMID 17442505›Full record

ArticleGene2007

Regional FMRP deficits and large repeat expansions into the full mutation range in a new Fragile X premutation mouse model.

Ali Entezam, Rea Biacsi, Bonnie Orrison, Tapas Saha, Gloria E Hoffman, Ed Grabczyk, Robert L Nussbaum, Karen Usdin

Open access · greenAbstract read
In one paragraph

Article in Gene, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 140 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
140citing papers in PubMed, 1 pooled it
6.0field-weighted citation impact, top 3% 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

140 citing papers in PubMed, 1 synthesis or guideline pooled it, 182 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. GABAergic Progenitor Cell Graft Rescues Cognitive Deficits in Fragile X Syndrome Mice.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Mouse models of fragile X-related disorders.Disease models & mechanisms · 2023
    Review
  17. Identification ofProceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  18. Review
  19. Mechanisms of theInternational journal of molecular sciences · 2022
    Review
  20. Review

80 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

8 authors at 2 institutions in 1 country.

Ali EntezamLaboratory of Molecular and Cellular Biology, NIDDK, National Institutes of Health, Bethesda, MD 20892, United States.
Rea Biacsi
Bonnie Orrison
Tapas Saha
Gloria E Hoffman
Ed Grabczyk
Robert L Nussbaum
Karen Usdin
National Institutes of Health · USNational Institute of Diabetes and Digestive and Kidney Diseases · US

Funding

THE TRIPLET EXPANSION DISEASESZ01DK057602 · NIDDK · NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES · PI USDIN, KAREN P. · 1997 to 2008
$624k
Mechanism of repeat expansion in Fragile X syndromeZ01DK057808 · NIDDK · NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES · PI USDIN, KAREN P. · 2007 to 2008
$570k
Intramural NIH HHS Z01 DK057602
6 · The paper itself

Abstract

Carriers of FMR1 alleles with 55-200 repeats in the 5' UTR are at risk for Fragile X associated tremor and ataxia syndrome. The cause of the neuropathology is unknown but is thought to be RNA-mediated. Maternally transmitted premutation alleles are also at risk of expansion of the repeat tract into the "full mutation" range (>200 repeats). The mechanism responsible for expansion is unknown. Full mutation alleles produce reduced amounts of the FMR1 gene product, FMRP, which leads to Fragile X mental retardation syndrome. We have developed a murine model for Fragile X premutation carriers that recapitulates key features seen in humans including a direct relationship between repeat number and Fmr1 mRNA levels, an inverse relationship with FMRP levels and Purkinje cell dropout that have not been seen in a previously described knock-in mouse model. In addition, these mice also show a differential deficit of FMRP in different parts of the brain that might account for symptoms of the full mutation that are seen in premutation carriers. As in humans, repeat instability is high with expansions predominating and, for the first time in a mouse model, large expansions into the full mutation range are seen that occur within a single generation. Thus, contrary to what was previously thought, mice may be good models not only for the symptoms seen in human carriers of FMR1 premutation alleles but also for understanding the mechanism responsible for repeat expansion, a phenomenon that is responsible for a number of neurological and neurodevelopmental disorders.

Indexed as

DNA Repeat Expansion5' Untranslated RegionsAllelesAnimalsBase SequenceBrainDisease Models, AnimalDNA MethylationFemaleFragile X Messenger Ribonucleoprotein 1Fragile X SyndromeGene TargetingGenomic InstabilityHumansMaleMice5' Untranslated RegionsFmr1 protein, mouseFragile X Messenger Ribonucleoprotein 1RNA, Messenger

Identifiers

PMID17442505
PMCPMC1950257
OpenAlexW2053985384

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.