Evidence map›Paper›PMID 8940270›Full record

ArticleAmerican journal of human genetics1996

Familial transmission of the FMR1 CGG repeat.

S L Nolin, F A Lewis, L L Ye, G E Houck, A E Glicksman, P Limprasert, S Y Li, N Zhong, A E Ashley, E Feingold and 2 more

Abstract read
In one paragraph

Article in American journal of human genetics, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

71 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Guideline
  2. Guideline
  3. FMR1 genotype interacts with parenting stress to shape health and functional abilities in older age.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2017
    Trial
  4. Interaction of FXTAS Family History and College Degree Attainment Predicts Trajectories of Cognitive and Motor Symptoms in FMR1 Premutation Carrier Women.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2026
    Article
  5. Article
  6. Article
  7. Article
  8. The Impact of Mild Chronic Stress and Maternal Experience in theInternational journal of molecular sciences · 2023
    Article
  9. FMR1 CGG Repeats and Stress Influence Self-Reported Cognitive Functioning in Mothers.American journal on intellectual and developmental disabilities · 2023
    Article
  10. Astrocytes in fragile X syndrome.Frontiers in cellular neuroscience · 2023
    Review
  11. Review
  12. Article
  13. Article
  14. Mild Neurological Signs in FMR1 Premutation Women in an Unselected Community-Based Cohort.Movement disorders : official journal of the Movement Disorder Society · 2021
    Article
  15. Review
  16. Article
  17. Laboratory testing for fragile X, 2021 revision: a technical standard of the American College of Medical Genetics and Genomics (ACMG).Genetics in medicine : official journal of the American College of Medical Genetics · 2021
    Article
  18. Screening forBioMed research international · 2021
    Article
  19. Article
  20. The Phenotypic Profile Associated With theFrontiers in psychiatry · 2021
    Article

11 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.

S L NolinDepartment of Human Genetics, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY 10314, USA.
F A Lewis
L L Ye
G E Houck
A E Glicksman
P Limprasert
S Y Li
N Zhong
A E Ashley
E Feingold
S L Sherman
W T Brown

Funding

GENETIC STUDIES OF THE FRAGILE X SYNDROMER01HD029407 · NICHD · INSTITUTE FOR BASIC RES IN DEV DISABIL · PI BROWN, W TED · 1994 to 1994
–
NICHD NIH HHS HD29407PHS HHS MCJ360587
6 · The paper itself

Abstract

To better define the nature of FMR1 CGG-repeat expansions, changes in allele sizes for 191 families with fragile X and for 33 families with gray-zone repeats (40-60) were analyzed. Expansion of the fragile X chromosome to the full mutation was seen in 13.4% of offspring from premutation mothers with 56-59 repeats, 20.6% of those with 60-69 repeats, 57.8% of those with 70-79 repeats, 72.9% of those with 80-89 repeats, and 97.3% of those with 90-199 repeats. For premutation fathers, the majority (62%) of their daughters had a larger repeat number, while a few had either a smaller (22%) or the same (16%) repeat number, compared with their fathers' sizes. However, daughters with a smaller repeat number were observed only if their fathers had > or = 80 repeats. Fifteen (39.5%) of 38 such daughters carried a smaller repeat than did their fathers. We observed that a similar repeat number was inherited more often than expected by chance, among the members of a sibship segregating fragile X. This familial clustering, observed in the offspring of both males and females with a premutation, implies there may be an additional factor, independent of parental repeat size, that influences CGG-repeat instability. Instability in gray-zone allele transmissions was observed in 25% of alleles with 50-60 CGGs but in <8% of those with 40-49 CGGs. Examination of gray-zone allele organization revealed that long tracts of pure CGGs (>34) are not always unstably transmitted. These results raise new questions regarding the familial factors that may determine transmission expansions.

Indexed as

AllelesAnalysis of VarianceChromosome FragilityFemaleFragile X SyndromeHumansMalePedigreePolymerase Chain ReactionTrinucleotide Repeats

Identifiers

PMID8940270
PMCPMC1914886

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.