Correlation between Certain Klotho Gene Polymorphisms and IGF-1 Levels of Colorectal Cancer Patients in Northern Iran

Colorectal cancer susceptibility may correlate with the Klotho gene G-395A and C1818T polymorphisms. This study aims to evaluate the relationship between a Klotho single nucleotide polymorphism and IGF-1 with risk of colorectal cancer.
This study enrolled 60 colorectal cancer patients and 60 age-matched healthy persons who referred to Razi Hospital, Rasht, and Northern Iran in September 2013. Patients enrolled under supervision of a gastro-intestinal specialist and according to the ethics right. G-395A and C1818T polymorphisms were genotyped with polymerase chain confronting two pair primer technology. IGF-1 and certain biochemistry analytes were assayed. Statistical analysis was used to compare appropriate relationships.
There were different base pair partitions for G395A and C1818T. Odds ratio and 95% confidence interval were used to analyze the correlation of genotypes and haplotypes with colorectal cancer susceptibility. The AA (odds ratio: 1.437, 95% confidence interval: 0.596) and GA (odds ratio: 1.958, 95% confidence interval: 1.133- 3.385) genotypes of the G-395A polymorphisms showed a slight relationship to the risk of colorectal cancer. The A allele had a much higher frequency in the case group (31.2%) compared with the control group (17.6%). There was no significant relationship with the C1818T polymorphism between the case and control groups.
The Klotho gene polymorphism did not significantly increase the risk of colorectal cancer. Therefore, these genotypes might not have a correlation with IGF-1.