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http://dx.doi.org/10.7314/APJCP.2015.16.8.3173

Pro-(IL-18) and Anti-(IL-10) Inflammatory Promoter Genetic Variants (Intrinsic Factors) with Tobacco Exposure (Extrinsic Factors) May Influence Susceptibility and Severity of Prostate Carcinoma: A Prospective Study  

Dwivedi, Shailendra (Department of Biochemistry, All India Institute of Medical Sciences)
Singh, Sarvesh (Department of Pharmacology and Therapeutics, King George Medical University)
Goel, Apul (Department of Urology, King George Medical University)
Khattri, Sanjay (Department of Pharmacology and Therapeutics, King George Medical University)
Mandhani, Anil (Department of Urology, Sanjay Gandhi Post Graduate Institute of Medical Sciences)
Sharma, Praveen (Department of Biochemistry, All India Institute of Medical Sciences)
Misra, Sanjeev (Department of Surgical Oncology, All India Institute of Medical Sciences)
Pant, Kamlesh Kumar (Department of Pharmacology and Therapeutics, King George Medical University)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.16, no.8, 2015 , pp. 3173-3181 More about this Journal
Abstract
Background: It has been hypothesized that IL-18 (pro-) and IL-10 (anti-) inflammatory genetic variants at -607 C/A-137G/C and -819C/T,-592C/A, respectively, may generate susceptibility and severity risk with various modes of tobacco exposure in prostate carcinoma (PCa) patients. IL-18 is a pro-inflammatory cytokine expressed on various cells including prostate gland elements, and is a key mediator of immune responses with anti-cancerous properties. IL-10 is an anti-inflammatory cytokine that is associated with tumour malignancy which causes immune escape. Materials and Methods: The present study was conducted with 540 subjects, comprising 269 prostate carcinoma patients and 271 controls. Genotyping was performed by PCR-RFLP and confirmed by real time PCR probe-based methods. Results: The findings indicated that the mutant heterozygous and homozygous genotype CC and GC+CC showed significant negative associations (p=0.01, OR=0.21; 95% CI: 0.08-0.51 and p=0.011, OR=0.43; 95% CI: 0.22-0.81, respectively) thus, less chance to be diagnosed as cancer against GG genotype of tobacco smoking patients. In addition, a heterozygous GC genotype at the same locus of IL-18 pro-inflammatory cytokine may aggravate the severity (OR=2.82; 95%CI 1.09-7.29 :p=001) so that patients are more likely to be diagnosed in advanced stage than with the GG wild homozygous genotype. Our results also illustrated that anti-inflammatory cytokine (IL-10) genetic variants, although showing no significant association with susceptibility to cancer of the prostate, may gave profound effects on severity of the disease, as -819 TC (OR=4.60; 95%CI 1.35-15.73), and -592 AC (OR=5.04; 95%CI 1.08-25.43) of IL-10 in tobacco chewers and combined users (both chewers and smokers) respectively, are associated with diagnosis in more advanced stage than with other variants. Conclusions: We conclude that promoter genetic variants of IL-18 and IL-10 with various modes of tobacco exposure may affect not only susceptibility risk but also severity in prostate cancer.
Keywords
Prostate carcinoma; tobacco smokers/chewers; combined users; IL-18; IL-10; genetic polymorphisms;
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