Methylation-Specific Sequencing of GSTP1 Gene Promoter in Circulating/Extracellular DNA from Blood and Urine of Healthy Donors and Prostate Cancer Patients

Prostate cancer is one of the most common types of cancer in men. A total of 110 Iraqi Arab individuals were included in this study; 60 individuals of them had prostate cancer with increased levels of TPSA (patients group); their age range 52-90 years. They were referred for diagnosis and treatment to the National Al-Amal Hospital for oncology in Baghdad during the period from July 2017 to October 2017. While the other 50 apparently healthy subjects were the control group, their age range similar to patients group. Sera and blood samples were collected from all patients and controls than used to assess for the level of IL-18 and DNA extraction, respectively. The polymorphisms were analyzed using polymerase chain reaction-single specific primer (PCR-SSP), at the position -137 G\C (rs187238) in the promoter of IL18 gene. The genetic polymorphism of the IL18 gene promoter -137G/C (rs187238) was determined and presented with three genotypes (GG, GC, and CC) in prostate cancer patients and controls. Testing for Hardy-Weinberg (H-W) equilibrium revealed that Prostate cancer patients showed insignificant variation in the distribution of IL-18 -137 genotypes (P> 0.05). While the control samples showed significant variation (p â‰¤0.05) between the observed and expected. Comparing patients with controls indicated that IL-18-137 alleles or genotypes showed no association with the risk of prostate cancer development in Iraqi Arab population or protection against them. Serum level of IL-18 was highly significant (P â‰¤ 0.001) increased in patients compared to control. The IL-18 serum levels differences in GG and GC genotypes was significant (p <0.05) between patients and control. While there were no significant differences between the three IL-18 -137 genotypes inpatient or in controls.

Download Full-text

Correlation of GSTP1 Polymorphism with Severity of Prostate Cancer in an Eastern Indian Population

Journal of Advances in Medicine and Medical Research ◽

10.9734/jammr/2019/v29i230062 ◽

2019 ◽

pp. 1-10

Author(s):

Suparna Roy ◽

Anindya Dasgupta ◽

Subarnarekha Chatterji ◽

Dilip Karmakar

Keyword(s):

Prostate Cancer ◽

Cancer Patients ◽

Odds Ratio ◽

Indian Population ◽

Pcr Amplification ◽

Prognostic Indicator ◽

Case Group ◽

Current Case ◽

Gstp1 Gene ◽

Risk Of Cancer

Background: GSTP1 is one of the Glutathione-S-Transferases (GSTs) which suppress tumor genesis by detoxifying toxic carcinogens and reactive oxygen species (ROS). Prostate cancer is related to several mutations affecting the expression of GSTP1. A single nucleotide polymorphism (SNP: Ile105Val) in the GSTP1 gene results insignificant reduction in its anticancer activity. The current case control study was conducted to ascertain the risk of association of GSTP1polymorphism with risk of cancer prostate in an Eastern Indian population. Materials and Methods: During a study period of 2 years, DNA was isolated using the phenol chloroform extraction method from the blood of 225 histopathologically diagnosed prostate cancer patients and 120 matched controls. The GSTP1 polymorphism was assessed by PCR amplification of the gene followed by restriction digestion with Alw261 (a restriction enzyme derived from Acinetobactro lwoffi RFL26). Histopathological grading in the case group was performed using Gleason’s scores and International Society of Urological Pathology (ISUP) grading. Results: Comparison of the distribution of different GSTP1 alleles between the case and control groups was performed by chi square test and odds ratio analysis. A χ2 value of 18.56 suggested significantly higher number of G alleles in the case group. An odds ratio of 2.25 with a confidence interval of 1.52 to 3.34 for 95% CI showed that the G allele in GSTP1 gene were linked with greater risk of prostate cancer. Post hoc ANOVA and logistic regression suggested that cases having G alleles had more progressive form of diseases as evident from ISUP grades. Conclusion: From our study we can conclude that GSTP1 polymorphism is not only significantly associated with risk of prostate cancer but also with its severity in our Eastern Indian population. GSTP1 polymorphism should be considered as a prognostic indicator for prostate cancer patients along with planning for more aggressive management of the disease.

Download Full-text