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      Interleukin-6 (IL-6)-597 A/G (rs1800797) & -174 G/C (rs1800795) gene polymorphisms in type 2 diabetes

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          Background & objectives:

          Diabetes is a metabolic pro-inflammatory disorder characterized by chronic hyperglycaemia and increased levels of circulating cytokines suggesting a causal role for inflammation in its aetiology. In order to decipher the role of interleukin-6 (IL-6) in type 2 diabetes mellitus (T2DM) we analyzed two promoter polymorphisms -597 A/G (rs1800797) and -174 G/C (rs1800795) in T2DM cases from north India, and in healthy controls.


          DNA was isolated from venous blood samples of T2DM patients (n=213) and normal healthy controls (n=145). Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was performed after biochemical analysis. The genotypic and allelic frequency distributions were analyzed.


          The clinical/biochemical parameters of T2DM cases when compared to controls showed a significant difference. No significant association was observed with -597A/G polymorphism while, -174 G/C showed a highly significant association ( P<0.001). In haplotypic analysis, combination of -597G*/-174C* showed significant association ( P=0.010).

          Interpretation & conclusions:

          Our data suggest that IL-6 gene polymorphisms play a prominent role in T2DM disease susceptibility in population from north India.

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          Most cited references 28

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            SHEsis, a powerful software platform for analyses of linkage disequilibrium, haplotype construction, and genetic association at polymorphism loci.

             Y Shi,  Sai-Lin He (2005)
            In multiloci-based genetic association studies of complex diseases, a powerful and high efficient tool for analyses of linkage disequilibrium (LD) between markers, haplotype distributions and many chi-square/p values with a large number of samples has been sought for long. In order to achieve the goal of obtaining meaningful results directly from raw data, we developed a robust and user-friendly software platform with a series of tools for analysis in association study with high efficiency. The platform has been well evaluated by several sets of real data.
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              Prevalence of diabetes and prediabetes (impaired fasting glucose and/or impaired glucose tolerance) in urban and rural India: phase I results of the Indian Council of Medical Research-INdia DIABetes (ICMR-INDIAB) study.

              This study reports the results of the first phase of a national study to determine the prevalence of diabetes and prediabetes (impaired fasting glucose and/or impaired glucose tolerance) in India. A total of 363 primary sampling units (188 urban, 175 rural), in three states (Tamilnadu, Maharashtra and Jharkhand) and one union territory (Chandigarh) of India were sampled using a stratified multistage sampling design to survey individuals aged ≥ 20 years. The prevalence rates of diabetes and prediabetes were assessed by measurement of fasting and 2 h post glucose load capillary blood glucose. Of the 16,607 individuals selected for the study, 14,277 (86%) participated, of whom 13,055 gave blood samples. The weighted prevalence of diabetes (both known and newly diagnosed) was 10.4% in Tamilnadu, 8.4% in Maharashtra, 5.3% in Jharkhand, and 13.6% in Chandigarh. The prevalences of prediabetes (impaired fasting glucose and/or impaired glucose tolerance) were 8.3%, 12.8%, 8.1% and 14.6% respectively. Multiple logistic regression analysis showed that age, male sex, family history of diabetes, urban residence, abdominal obesity, generalised obesity, hypertension and income status were significantly associated with diabetes. Significant risk factors for prediabetes were age, family history of diabetes, abdominal obesity, hypertension and income status. We estimate that, in 2011, Maharashtra will have 6 million individuals with diabetes and 9.2 million with prediabetes, Tamilnadu will have 4.8 million with diabetes and 3.9 million with prediabetes, Jharkhand will have 0.96 million with diabetes and 1.5 million with prediabetes, and Chandigarh will have 0.12 million with diabetes and 0.13 million with prediabetes. Projections for the whole of India would be 62.4 million people with diabetes and 77.2 million people with prediabetes.

                Author and article information

                Indian J Med Res
                Indian J. Med. Res
                The Indian Journal of Medical Research
                Medknow Publications & Media Pvt Ltd (India )
                July 2014
                : 140
                : 1
                : 60-68
                Department of Zoology, University of Lucknow, Lucknow, India
                [* ] Department of Medicine, King George's Medical University, Lucknow, India
                [** ] Department of Physiology, King George's Medical University, Lucknow, India
                Author notes
                Reprint requests: Dr Monisha Banerjee, Molecular & Human Genetics Laboratory, Department of Zoology University of Lucknow, Lucknow 226 007, India e-mail: mhglucknow@ , banerjee_monisha30@
                Copyright: © Indian Journal of Medical Research

                This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Original Article


                t2dm, snp, pcr-rflp, interleukin-6, gene polymorphism


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