Association of vitamin D receptor gene polymorphisms with colon cancer.

Objective: In this study, we investigated the association of two vitamin D receptor (VDR) polymorphisms BsmI and TaqI with colon cancer in a Caucasian population.

Methods: The VDR gene polymorphisms BsmI and TaqI were detected by polymerase chain reaction (PCR), restriction fragment length polymorphism (RFLP)-genotyping assays by using endonucleases BsmI and TaqI, and an agarose gel electrophoresis technique in a series of 43 colon cancer patients and 42 healthy controls.

Results: Allele frequencies and genotype distributions were found to be similar in both cases and controls.

The effects of NOS3 Glu298Asp variant on colorectal cancer risk and progression in Turkish population.

Endothelial nitric oxide synthase (eNOS), coded by the gene NOS3, may play an important role in uncontrollable cellular growth in several cancer types. Our study was performed to test the association between Glu298Asp polymorphisms in the NOS3 gene and colorectal cancer risk and progression. In this study, NOS3 Glu298Asp polymorphism was genotyped in 84 patients with colorectal cancer and 99 healthy subjects using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis.

Genetic variants of SDF-1 and CXCR4 genes in endometrial carcinoma.

In this study, we aimed to investigate a possible association between the Stromal cell-derived factor-1 (SDF-1) and CXCR4 polymorphisms and the risk of developing endometrial carcinoma. SDF-1 3'A and CXCR4 gene polymorphisms was performed by polymerase chain reaction (PCR) and restriction fragment length polymorphism in 139 healthy individuals and 113 patients with endometrial carcinoma. In our study groups SDF-1 3'A AA genotype frequency was higher in patients that of controls and individuals who had AA genotype showed a 2.

Polymorphisms in the microsomal epoxide hydrolase gene: role in lung cancer susceptibility and prognosis.

Aims And Background: The aim of this study was to investigate the relationship between EPHXI exon 3 Tyr113His and exon 4 His139Arg polymorphisms, predicted microsomal epoxide hydrolase (mEH) activity, and lung cancer development. mEH is a protective enzyme involved in oxidative defences against a number of environmental chemicals and pollutants, but it is also responsible for the xenobiotic activation of carcinogens.

Methods: We investigated the two polymorphisms of the mEH gene (EPHX1) in 58 lung cancer patients and 41 controls using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).

Is there any correlation between TNF-related apoptosis-inducing ligand (TRAIL) genetic variants and breast cancer?

Introduction: TNF-related apoptosis-inducing ligand (TRAIL) is a death ligand and also a member of the TNF superfamily. We aimed to investigate the possible relationship between TRAIL and breast cancer. Here, we report the results of the first association study on genetic variation in the TRAIL gene and its effect on breast cancer susceptibility and prognosis.

Association of vitamin D receptor Taq I polymorphism and susceptibility to oral squamous cell carcinoma.

Background: It has been hypothesised that vitamin D receptor (VDR) gene polymorphisms may influence both the risk of cancer occurrence and prognosis.

Materials And Methods: The distribution of VDR Taq I polymorphism in 64 patients with OSCC was determined by polymerase chain reaction based restriction fragment length polymorphism (RFLP) and compared with that of 87 healthy controls.

Results: There was a significant difference in the distribution of VDR Taq I genotypes between OSCC patients and healthy controls.

The influence of cyclin D1 A870G polymorphism on colorectal cancer risk and prognosis in a Turkish population.

Background: Cyclin D1, encoded by the gene CCND1, is a regulatory protein in the cell cycle transition from G(1) phase to S phase. A common polymorphism (A870G) at codon 242 affects splicing of the CCND1 transcript and may cause uncontrollable cellular growth. The present study was performed to test the association between A870G polymorphisms in the CCND1 gene and colorectal cancer risk and progression.

Association between CDKN1A Ser31Arg and C20T gene polymorphisms and colorectal cancer risk and prognosis.

Background: CDKN1A (p21(WAF1/CIP1)) plays an important role in cell cycle regulation. Somatic alterations in genes which regulate cell division have been shown to be related to different types of cancer prognosis and survival. The purpose of this study was to investigate the effect of the CDKN1A Ser31Arg and C20T gene polymorphisms in Turkish patients with colorectal cancer.

Breast cancer and cyclin D1 gene polymorphism in Turkish women.

Background: Cyclin D1 protein plays an important part in regulating the progress of the cell during the G(1) phase of the cell cycle. It has been suggested that G870A polymorphism at the exon4/intron4 splicing region of the CCND1 gene may play a role in tumorigenesis and invasiveness.

Patients And Methods: A case-control study was performed to test the association between G870A polymorphisms in the CCND1 gene and breast cancer risk and cancer progression.

Role of L-MYC polymorphism in oral squamous cell carcinoma in Turkey.

Background: An association between restriction fragment length polymorphism (RFLP) of known oncogenes and a predisposition to develop cancer has been postulated. Our aim was to test the hypothesis that there was an association between the L-MYC S allele in oral squamous cell carcinoma (OSCC) and a predisposition for the disease.

Patients And Methods: The distribution of L-MYC polymorphism in 80 patients with OSCC was determined by polymerase chain reaction-based RFLP and compared with that of 60 healthy controls.

L-myc gene polymorphism and risk of thyroid cancer.

Unlabelled: L-myc gene polymorphism is a representative genetic trait responsible for an individual's susceptibility to several cancers. However, there have been no reports concerning the association between thyroid cancer and L-myc gene polymorphism.

Aim: To analyze the distribution of L-myc gene polymorphism in Turkish patients with thyroid disorders and thyroid cancers.

Fas-1377 A/G polymorphism in lung cancer.

Background: Reduced expression of Fas and/or increased expression of FasL is known to exist in some cancer types including lung cancer, so the Fas/FasL system may play a role in the course of cancer. Lack of cell surface Fas expression is one of the main routes of apoptotic resistance in tumor formation and progression. Functional mutations in the Fas gene that impair apoptotic signal transduction are associated with susceptibility to various types of cancer.

Investigation of the VDR gene polymorphisms association with susceptibility to colorectal cancer.

The effects of 1,25-dihydroxyvitamin D3 are mediated by binding to a specific intracellular vitamin D receptor (VDR), which has been identified in a variety of tissues. Certain polymorphisms in the VDR gene have been associated with various neoplasms. For this purpose, we studied whether VDR TaqI or FokI genotype are associated with serum 25-hydroxyvitamin D3 in 52 controls and 26 patients with colorectal cancer.