American Journal of Infectious Diseases

Study the Impact of T-helper 1 Cytokine (TNF-α) Polymorphisms on Susceptibility/Resistance to Brucellosis in Makkah Region

Alaa B. Ismael, Adil Mergani, Salama A-H Mostafa and Abdelmoneim M. Salim

DOI : 10.3844/ajidsp.2016.57.64

American Journal of Infectious Diseases

Volume 12, Issue 3

Pages 57-64


Polymorphisms in the regulatory regions of cytokine genes may not only increase susceptibility to some infectious diseases but also affect the course and prognosis of the disease. TNF-α is considered an important Th1 cytokines that plays critical roles in control of Brucella infection and in macrophage activation. In this study, we are going to analyze the relationship of two polymorphisms in TNF-α and the inherited susceptibility/resistance to brucellosis in population of Makkah region. A cases-control association study was conducted in 69 individuals with human Brucellosis and 112 healthy individuals. Genotyping of TNF- 308G>A and -857C>T polymorphism in both patients and healthy controls was done by PCR-RFLP method and were assessed for potential associations with susceptibility for human brucellosis and their mode of penetrance. The findings indicate an increased risk of TNF-α-308 A allele for human brucellosis reliable with the recessive genetic model of penetrance (Odd Ratio: 3.222, 95% CI: 1.008-5.702, P = 0.018). There is no association between susceptibility of human brucellosis and TNF-α-857 C/T polymorphism was observed. The protective role of TNF-α-857 C/T polymorphism against human brucellosis in this study population could not be excluded.


© 2016 Alaa B. Ismael, Adil Mergani, Salama A-H Mostafa and Abdelmoneim M. Salim. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.