Title:The Influence of TNF-α, IL-6, TGF-β1, IFN-γ, IL-10 Polymorphisms on Predisposition
to Diabetes Mellitus among Jordanian Patients
Volume: 23
Issue: 5
Author(s): Sawsan I. Khdair*, Ola S. Al-Naimat, Wassan Jarrar, Walid Al-Qerem and Feras A. Khudeir
Affiliation:
- Department of Pharmacy, Al-Zaytoonah University of Jordan, Amman 11733, Jordan
Keywords:
Cytokines, SNPs, Jordan, type 1 diabetes, type 2 diabetes mellitus, polymorphisms.
Abstract:
Background: Diabetes mellitus is a long-term disorder with high prevalence globally.
It can be classified into two types: Type 1 diabetes and Type 2 diabetes mellitus. Diabetes mellitus
is considered a multifactorial disorder in which genetic factors such as cytokines play a major role.
Cytokines play a role in immune modulation and are associated with the development of diabetes
mellitus. Single nucleotide polymorphisms in cytokines were studied extensively in different populations
to determine their association with a predisposition to diabetes mellitus.
Objective: The aim of this study was to estimate the frequency of single nucleotide polymorphisms
in the cytokine genes TNF-α, TGF-β, IL-6, IL-10, and IFN-γ in 102 Jordanian diabetes mellitus
patients in comparison to 50 controls and their association to diabetes mellitus susceptibility.
Methods: Analysis was performed using the highly specific polymerase chain reaction-sequence
specific primers methodology.
Results: Our findings showed that the IL-10-1082 G/G genotype (P = 0.02) and the TGF-β1 codon
25*G allele (P < 0.01) may be considered risk factors for type 2 diabetes mellitus. In addition, the
IFN-γ-874*A allele (P = 0.04) seems to increase the predisposition to type 1 diabetes.
Conclusion: Our study showed that the IL-10-1082 G/G genotype and TGF-β1 codon 25*G allele
are associated with type 2 diabetes mellitus while the IFN- γ -874*A allele is associated with type
1 diabetes. Our findings may help in the early detection of diabetes mellitus, which would in turn
help in undergoing the needed preventative measures to delay the onset of diabetes mellitus.