Evidence map›Paper›PMID 7887418›Full record

ArticleAmerican journal of human genetics1995

Studies of X inactivation and isodisomy in twins provide further evidence that the X chromosome is not involved in Rett syndrome.

B R Migeon, M A Dunn, G Thomas, B J Schmeckpeper, S Naidu

Open access · greenAbstract readTwin Study
In one paragraph

Article in American journal of human genetics, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 59 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Progress in Rett Syndrome: from discovery to clinical trials.Wiener medizinische Wochenschrift (1946) · 2016
    Article
  5. Monozygotic twins with Rett syndrome: Phenotyping the first two years of life.Journal of developmental and physical disabilities · 2014
    Article
  6. Article
  7. Rett syndrome: clinical review and genetic update.Journal of medical genetics · 2005
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Monozygotic twins discordant for Aicardi syndrome.Journal of medical genetics · 1997
    Article
  14. Rett syndrome.Journal of medical genetics · 1996
    Review
  15. Article
  16. Article
  17. Article
  18. Rett syndrome.Indian journal of pediatrics
    Review
  19. MicroRNAs and epigenetic regulation in the mammalian inner ear: implications for deafness.Mammalian genome : official journal of the International Mammalian Genome Society
    Review
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

5 authors at 2 institutions in 1 country.

B R MigeonCenter for Medical Genetics, Johns Hopkins University, Baltimore, MD.
M A Dunn
G Thomas
B J Schmeckpeper
S Naidu
Johns Hopkins University · USKennedy Krieger Institute · US

Funding

NICHD NIH HHS HD05465NICHD NIH HHS HD2448
6 · The paper itself

Abstract

Rett syndrome (RS), a progressive encephalopathy with onset in infancy, has been attributed to an X-linked mutation, mainly on the basis of its occurrence almost exclusively in females and its concordance in female MZ twins. The underlying mechanisms proposed are an X-linked dominant mutation with male lethality, uniparental disomy of the X chromosome, and/or some disturbance in the process of X inactivation leading to unequal distributions of cells expressing maternal or paternal alleles (referred to as a "nonrandom" or "skewed" pattern of X inactivation). To determine if the X chromosome is in fact involved in RS, we studied a group of affected females including three pairs of MZ twins, two concordant for RS and one uniquely discordant for RS. Analysis of X-inactivation patterns confirms the frequent nonrandom X inactivation previously observed in MZ twins but indicates that this is independent of RS. Analysis of 29 RS females reveals not one instance of uniparental X disomy, extending the observations previously reported. Therefore, our findings contribute no support for the hypothesis that RS is an X-linked disorder. Furthermore, the concordant phenotype in most MZ female twins with RS, which has not been observed in female twins with known X-linked mutations, argues against an X mutation.

Indexed as

Chromosome AberrationsDosage Compensation, GeneticX ChromosomeChildDiseases in TwinsFemaleGenetic LinkageGenotypeHumansPedigreeRett SyndromeTwins, Monozygotic

Identifiers

PMID7887418
PMCPMC1801188
OpenAlexW1538286159

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.