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Effect of IL-12B, IL-2, TGF-β1, and IL-4 Polymorphism and Expression on Hepatitis B Progression
To cite this article:
Saxena Roli, Chawla Yogesh Kumar, VermaIndu, and KaurJyotdeep. Journal of Interferon & Cytokine Research. February 2014, 34(2): 117-128. doi:10.1089/jir.2013.0043.
Published in Volume: 34 Issue 2: February 10, 2014
Online Ahead of Print: October 26, 2013
Author information
Roli Saxena,1 Yogesh Kumar Chawla,2 Indu Verma,1 and Jyotdeep Kaur 1
1Department of Biochemistry, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
2Department of Hepatology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Address correspondence to:
Dr. Jyotdeep Kaur
Department of Biochemistry
Postgraduate Institute of Medical Education and Research
Sector 12
Chandigarh 160 012
India
E-mail: [email protected]
Received 16 April 2013
Accepted 7 August 2013
ABSTRACT
The hepatitis B virus (HBV) infection-induced chronic inflammation is considered to be the major etiological factor for HBV-related disease chronicity. Cytokines act as the key coordinators of the inflammatory responses involved in HBV disease pathogenesis. The present study assessed association among IL-12B(+1188), IL-2(−330), TGF-β1(−509), and IL-4(−590) genotypes; mRNA; and protein levels with HBV-hepatocellular carcinoma (HCC) risk in India. For this, 403 subjects (153 controls, 67 inactive HBV-carriers, 62 chronic-active HBV patients, 62 HBV-cirrhotics, and 59 HBV-HCC ssubjects) were enrolled in the study. The genotyping was carried by polymerase chain reaction (PCR)-restriction fragment length polymorphism (IL-12+1188A/C, IL-2−330T/G, and TGF-β1−509C/T), and allele specific (AS)-polymerase chain reaction (IL-4−590C/T). Enzyme-linked immunosorbent assay and reverse transcriptase–polymerase chain reaction methods were used for assessing protein and the mRNA expression, respectively, of the mentioned cytokines. The study revealed that the IL-12B(+1188) CC genotype shared a significant positive association with hepatitis, among controls. While, in the case of IL-2(−330), both the TG and GG genotypes were not significantly associated with HCC risk. The TGF-β1(−509) TT genotype acted as a potential protective factor for cirrhosis and the HCC risk, among carriers. On the contrary, the IL-4(−590) CT genotype was found to be a vital protective factor for the development of hepatitis, among carriers. Besides, IL-12B, TGF-β1, and IL-2 seem to be majorly involved in the development of HCC, while, IL-4 might be responsible for the progression of the HBV disease till cirrhosis development. These initial findings are indicative of the vital role of genotypes and/or levels of IL-12B, IL-2, IL-4, and TGF-β1 in HBV disease chronicity in Indian population.
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