Evidence map›Paper›PMID 25525361›Full record

ArticleNeuropsychiatric disease and treatment2014

Association of Per3 length polymorphism with bipolar I disorder and schizophrenia.

Ramanujam Karthikeyan, Ganapathy Marimuthu, Chellamuthu Ramasubramanian, Gautham Arunachal, Ahmed S BaHammam, David Warren Spence, Daniel P Cardinali, Gregory M Brown, Seithikurippu R Pandi-Perumal

Open access · goldAbstract read
In one paragraph

Article in Neuropsychiatric disease and treatment, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

21 citing papers in PubMed, 39 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Review
  8. Sleep and Circadian Rhythm Disorder in Bipolar Affective Disorder.Current topics in behavioral neurosciences · 2021
    Article
  9. Article
  10. Article
  11. Sleep and circadian rhythms in health and disease: a complex interplay.European archives of psychiatry and clinical neuroscience · 2019
    Article
  12. Review
  13. Article
  14. Article
  15. Human genetics and sleep behavior.Current opinion in neurobiology · 2017
    Review
  16. Article
  17. Potential biomarkers for bipolar disorder: Where do we stand?The Indian journal of medical research · 2017
    Review
  18. Article
  19. Review
  20. 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

9 authors at 4 institutions in 4 countries.

Ramanujam KarthikeyanDepartment of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India.
Ganapathy MarimuthuDepartment of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India.
Chellamuthu RamasubramanianMS Chellamuthu Trust and Research Foundation, KK Nagar, Madurai, India.
Gautham ArunachalMS Chellamuthu Trust and Research Foundation, KK Nagar, Madurai, India.
Ahmed S BaHammamUniversity Sleep Disorders Center, College of Medicine, National Plan for Science and Technology, King Saud University, Riyadh, Saudi Arabia.
David Warren SpenceIndependent researcher, Toronto, Ontario, Canada.
Daniel P CardinaliDepartment of Teaching and Research, Faculty of Medical Sciences, Pontificia Universidad Católica Argentina, Buenos Aires, Argentina.
Gregory M BrownCentre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Seithikurippu R Pandi-PerumalCenter for Healthful Behavior Change (CHBC), Division of Health and Behavior, Department of Population Health, NYU Langone Medical Center, Clinical and Translational Research Institute, New York, New York, USA.
Madurai Kamaraj University · INCentre for Addiction and Mental Health · CAKing Saud University · SAPontificia Universidad Católica Argentina · AR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSleep-wake disturbances have frequently been reported in bipolar disorder and schizophrenia, and are considered to be caused by an underlying circadian rhythm disorder. The study presented here was designed to investigate the existence of Per3 polymorphism in bipolar disorder type I (BD-I) and schizophrenic patients in South India.

methodsBlood samples were collected from 311 BD-I patients, 293 schizophrenia patients, and 346 age- and sex-matched normal controls. Per3 genotyping was performed on DNA by polymerase chain reaction using specific primers.

resultsAn increased prevalence of five repeat homozygotes was seen in BD-I patients as compared with healthy controls (odds ratio =1.72 [95% confidence interval: 1.08-2.76, P=0.02]). In BD-I patients, the frequency of the five repeat allele was higher (allele frequency =0.41), and that of the four repeat allele lower (allele frequency =0.36) (χ (2)=4.634; P<0.03) than in the control group. No significant association was observed in the allele frequencies of four and five repeat alleles in schizophrenia patients when compared with controls.

conclusionThe occurrence of the five repeat allele of Per3 may be a risk factor for BD-I onset in this ethnic group.

Indexed as

bipolar disordercircadian rhythmsclock genesPer3 polymorphismschizophrenia

Identifiers

PMID25525361
PMCPMC4267513
OpenAlexW2008483419

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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.