Evidence map›Paper›PMID 23645039›Full record

ReviewMolecular biology reports2013

High prevalence of CYP2C19*2 allele in Roma samples: study on Roma and Hungarian population samples with review of the literature.

Csilla Sipeky, Agnes Weber, Melinda Szabo, Bela I Melegh, Ingrid Janicsek, Greta Tarlos, Istvan Szabo, Katalin Sumegi, Bela Melegh

Abstract readComparative StudyReview
PubMed Publisher
In one paragraph

Review in Molecular biology reports, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–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

12 citing papers in PubMed.

  1. Article
  2. Prevalence ofPharmacogenomics and personalized medicine · 2025
    Article
  3. Article
  4. Article
  5. From Croatian Roma to 1000 Genomes: The Story of theJournal of personalized medicine · 2022
    Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Pharmacogenomics and personalized medicine · 2017
    Article
  12. 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.

Csilla SipekyDepartment of Medical Genetics, University of Pecs, Szigeti 12, Pecs, 7624, Hungary. csilla.sipeky@aok.pte.hu
Agnes Weber
Melinda Szabo
Bela I Melegh
Ingrid Janicsek
Greta Tarlos
Istvan Szabo
Katalin Sumegi
Bela Melegh

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The purpose of our study was to characterise the CYP2C19*2 and CYP2C19*3 alleles in healthy Roma and Hungarian populations. DNA of 500 Roma and 370 Hungarian subjects were genotyped for CYP2C19*2 (G681A, rs4244285) and CYP2C19*3 (G636A, rs4986893) by PCR-RFLP assay and direct sequencing. Significant differences were found comparing the Roma and Hungarian populations in CYP2C19 681 GG (63.6 vs. 75.9%), GA (31.8 vs. 23.0%), AA (4.6 vs. 1.1%), GA+AA (36.4 vs. 24.1%) and A allele frequencies (0.205 vs. 0.125) (p<0.004). Striking differences were found between Roma and Hungarian samples in CYP2C19*1 (79.5 vs. 87.4%) and CYP2C19*2 (20.5 vs. 12.6%) alleles, respectively (p<0.001). None of the subjects was found to carry the CYP2C19*3 allele. Frequencies of the intermedier metabolizer phenotype defined by the *1/*2 genotype (0.318 vs. 0.230, p<0.005) and poor metabolizer predicted by the *2/*2 genotype (0.046 vs. 0.011, p<0.005) was significantly higher in Roma than in Hungarians, respectively. Genotype distribution of the Roma population was similar to those of the population of North India, however, a major difference was found in the frequency of the CYP2C19*2 allele, which is likely a result of admixture with European lineages. In conclusion, the frequencies of the CYP2C19 alleles, genotypes and corresponding extensive, intermediate and poor metabolizer phenotypes studied here in the Hungarian population are similar to those of other European Caucasian populations, but display clear differences when compared to the Roma population.

Indexed as

AllelesGenetic VariationAryl Hydrocarbon HydroxylasesBase SequenceCytochrome P-450 CYP2C19DNA PrimersGene FrequencyGenetics, PopulationGenotypeHumansHungaryMolecular Sequence DataPolymorphism, Restriction Fragment LengthPolymorphism, Single NucleotideRomani PeopleSequence Analysis, DNAAryl Hydrocarbon HydroxylasesCYP2C19 protein, humanCytochrome P-450 CYP2C19DNA Primers

Identifiers

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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.