Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.

Vitamin D3 is a secoster oid that exerts its effect by binding to its nuclear receptor called vitamin D receptor (VDR), inducing apoptosis and thereby inhibiting cell proliferation in cancer cells. The VDR receptor, located in the nucleus, is known to regulate the functions of over 200 genes. Variou...

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Main Authors: Mehr un Nisa Iqbal, Taseer Ahmed Khan, Syed Amir Maqbool
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2015-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4370503?pdf=render
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author Mehr un Nisa Iqbal
Taseer Ahmed Khan
Syed Amir Maqbool
author_facet Mehr un Nisa Iqbal
Taseer Ahmed Khan
Syed Amir Maqbool
author_sort Mehr un Nisa Iqbal
collection DOAJ
description Vitamin D3 is a secoster oid that exerts its effect by binding to its nuclear receptor called vitamin D receptor (VDR), inducing apoptosis and thereby inhibiting cell proliferation in cancer cells. The VDR receptor, located in the nucleus, is known to regulate the functions of over 200 genes. Various allelic forms of hVDR have been discovered that increase susceptibility to various cancers. The VDR-Cdx2 polymorphism, located in the promoter region of exon 1e in the VDR gene, influences the functional activity of the receptor, since the hVDR lacks consensus TATA and CAAT boxes. The current investigation examines the association between VDR-Cdx2 polymorphism and breast cancer in premenopausal females from Southern Pakistan.We conducted a case control study on 264 subjects (103 cases and 161 controls) who were recruited from a tertiary hospital located in Karachi, Pakistan. Genomic DNA was extracted from peripheral blood using a commercial kit method, and the VDR-Cdx2 polymorphism was genotyped using tetraprimer amplification refractory mutation system polymerase chain reaction (T-ARMS-PCR) method. Pearson chi square test was used to assess the association between VDR-Cdx2 genotype and breast cancer while genotype distribution in controls was evaluated by Hardy-Weinberg equilibrium (HWE). Breast cancer risk was calculated using odds ratios and 95% confidence intervals.The genotype distribution in the control group was in HWE (p > 0.05) for the VDR-Cdx2 polymorphism. A non-significant association was observed between VDR cdx2 polymorphism and breast cancer, however the GG genotype was at risk (OR = 1.832, 95% CI = 0.695-4.828) of developing breast cancer.The GG genotype of Cdx2-VDR gene polymorphism may increase the risk of developing breast cancer in young female patients in South Pakistan. Further investigations examining additional single nucleotide polymorphisms (SNPs) in VDR are required to assess their relationships with breast cancer.
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spelling doaj.art-7ac60f2ad49942c8bc15370955affdf12022-12-22T03:36:59ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01103e012265710.1371/journal.pone.0122657Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.Mehr un Nisa IqbalTaseer Ahmed KhanSyed Amir MaqboolVitamin D3 is a secoster oid that exerts its effect by binding to its nuclear receptor called vitamin D receptor (VDR), inducing apoptosis and thereby inhibiting cell proliferation in cancer cells. The VDR receptor, located in the nucleus, is known to regulate the functions of over 200 genes. Various allelic forms of hVDR have been discovered that increase susceptibility to various cancers. The VDR-Cdx2 polymorphism, located in the promoter region of exon 1e in the VDR gene, influences the functional activity of the receptor, since the hVDR lacks consensus TATA and CAAT boxes. The current investigation examines the association between VDR-Cdx2 polymorphism and breast cancer in premenopausal females from Southern Pakistan.We conducted a case control study on 264 subjects (103 cases and 161 controls) who were recruited from a tertiary hospital located in Karachi, Pakistan. Genomic DNA was extracted from peripheral blood using a commercial kit method, and the VDR-Cdx2 polymorphism was genotyped using tetraprimer amplification refractory mutation system polymerase chain reaction (T-ARMS-PCR) method. Pearson chi square test was used to assess the association between VDR-Cdx2 genotype and breast cancer while genotype distribution in controls was evaluated by Hardy-Weinberg equilibrium (HWE). Breast cancer risk was calculated using odds ratios and 95% confidence intervals.The genotype distribution in the control group was in HWE (p > 0.05) for the VDR-Cdx2 polymorphism. A non-significant association was observed between VDR cdx2 polymorphism and breast cancer, however the GG genotype was at risk (OR = 1.832, 95% CI = 0.695-4.828) of developing breast cancer.The GG genotype of Cdx2-VDR gene polymorphism may increase the risk of developing breast cancer in young female patients in South Pakistan. Further investigations examining additional single nucleotide polymorphisms (SNPs) in VDR are required to assess their relationships with breast cancer.http://europepmc.org/articles/PMC4370503?pdf=render
spellingShingle Mehr un Nisa Iqbal
Taseer Ahmed Khan
Syed Amir Maqbool
Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
PLoS ONE
title Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
title_full Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
title_fullStr Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
title_full_unstemmed Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
title_short Vitamin D receptor Cdx-2 polymorphism and premenopausal breast cancer risk in southern Pakistani patients.
title_sort vitamin d receptor cdx 2 polymorphism and premenopausal breast cancer risk in southern pakistani patients
url http://europepmc.org/articles/PMC4370503?pdf=render
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