Evidence map›Paper›PMID 27309378›Full record

ArticlePloS one2016

Association of Vitamin D Receptor Gene Polymorphisms with Colorectal Cancer in a Saudi Arabian Population.

Khayal A Alkhayal, Zainab H Awadalia, Mansoor-Ali Vaali-Mohammed, Omar A Al Obeed, Alanoud Al Wesaimer, Rabih Halwani, Ahmed M Zubaidi, Zahid Khan, Maha-Hamadien Abdulla

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
3.4field-weighted citation impact, top 8% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 43 citations in OpenAlex.

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  13. Saudi journal of medicine & medical sciences
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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 3 institutions in 1 country.

Khayal A AlkhayalColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
Zainab H AwadaliaColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
Mansoor-Ali Vaali-MohammedColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
Omar A Al ObeedColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
Alanoud Al WesaimerPrince Sultan Military Medical City, Department of internal medicine, Riyadh, Saudi Arabia.
Rabih HalwaniPrince Naif Center for Immunology Research and Asthma Research Chair, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
Ahmed M ZubaidiColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
Zahid KhanGenome Research Chair, Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia.
Maha-Hamadien AbdullaColorectal Research Chair, Department of Surgery, King Khalid University hospital, College of medicine, King Saud University, Riyadh, Saudi Arabia.
King Saud University · SAKing Khalid University Hospital · SARiyadh Armed Forces Hospital · SA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundVitamin D, causally implicated in bone diseases and human malignancies, exerts its effects through binding to the vitamin D receptor (VDR). VDR is a transcription factor modulating the expression of several genes in different pathways. Genetic variants in the VDR gene have been associated with several cancers in different population including colorectal cancer.

objectiveTo assess the association of VDR gene polymorphisms in relation with colorectal cancer (CRC) in a Saudi population.

methodsThe polymorphisms of VDR gene (BsmI, FokI, ApaI and TaqI) were analyzed by the polymerase chain reaction amplification of segments of interest followed by Sanger sequencing. One hundred diagnosed CRC patients and 100 healthy control subjects that were age and gender matched were recruited.

resultsWe did not observe significant association of any of the four VDR polymorphisms with colorectal cancer risk in the overall analysis. Although not statistically significant, the AA genotype of BsmI conferred about two-fold protection against CRCs compared to the GG genotype. Stratification of the study subjects based on age and gender suggests statistically significant association of CRC with the 'C' allele of ApaI in patients >57 years of age at disease diagnosis and BsmI polymorphism in females. In addition, statistically significant differences were observed for the genotypic distributions of VDR-BsmI, ApaI and TaqI SNPs between Saudi Arabian population and several of the International HapMap project populations.

conclusionDespite the absence of correlation of the examined VDR polymorphisms with CRCs in the combined analysis, ApaI and BsmI loci are statistically significantly associated with CRC in elderly and female patients, respectively. These findings need further validation in larger cohorts prior to utilizing these SNPs as potential screening markers for colorectal cancers in Saudi population.

Indexed as

Genetic Predisposition to DiseasePolymorphism, Restriction Fragment LengthPolymorphism, Single NucleotideAdultAgedAged, 80 and overAllelesCase-Control StudiesColorectal NeoplasmsDeoxyribonucleases, Type II Site-SpecificFemaleGene ExpressionGene FrequencyHumansLinkage DisequilibriumMaleDeoxyribonucleases, Type II Site-Specificendodeoxyribonuclease BsmIendodeoxyribonuclease FokIGGGCCC-specific type II deoxyribonucleasesReceptors, CalcitriolTCGA-specific type II deoxyribonucleasesVDR protein, human

Identifiers

PMID27309378
PMCPMC4911096
OpenAlexW2436158563

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LicenceCC BY
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Registered trials

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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.