No association between interferon-gamma receptor-1 gene polymorphism and pulmonary tuberculosis in a Gambian population sample

Awomoyi, A A, Nejentsev, S, Richardson, A, Hull, J, Koch, O, Podinovskaia, M, Todd, J A, McAdam, K P W J, Blackwell, J M, Kwiatkowski, D and Newport, M J (2004) No association between interferon-gamma receptor-1 gene polymorphism and pulmonary tuberculosis in a Gambian population sample. Thorax, 59 (4). pp. 291-294. ISSN 0040-6376

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Abstract

BACKGROUND

Tuberculosis (TB) is a major global cause of mortality and morbidity, and host genetic factors influence disease susceptibility. Interferon-gamma mediates immunity to mycobacteria and rare mutations in the interferon-gamma receptor-1 gene (IFNGR1) result in increased susceptibility to mycobacterial infection, including TB, in affected families. The role of genetic variation in IFNGR1 in susceptibility to common mycobacterial diseases such as pulmonary TB in outbred populations has not previously been investigated.

METHODS

The association between IFNGR1 and susceptibility to pulmonary TB was investigated in a Gambian adult population sample using a case-control study design. The coding and promoter regions of IFNGR1 were sequenced in 32 patients with pulmonary TB, and the frequencies of six common IFNGR1 polymorphisms were determined using PCR based methods in 320 smear positive TB cases and 320 matched controls. Haplotypes were estimated from the genotype data using the expectation-maximisation algorithm.

RESULTS

There was no association between the IFNGR1 variants studied and TB in this Gambian population sample. Three common haplotypes were identified within the study population, none of which was associated with TB.

CONCLUSIONS

These data represent an important negative finding and suggest that, while IFNGR1 is implicated in rare Mendelian susceptibility to mycobacterial disease, the common variants studied here do not have a major influence on susceptibility to pulmonary TB in The Gambian population.

Item Type: Article
Schools and Departments: Brighton and Sussex Medical School > Primary Care and Public Health
Brighton and Sussex Medical School > Global Health and Infection
Subjects: R Medicine > RC Internal medicine > RC0251 Constitutional diseases (General)
R Medicine > RC Internal medicine > RC0306 Tuberculosis
Depositing User: pam Thompson
Date Deposited: 09 May 2014 14:17
Last Modified: 21 Sep 2017 13:35
URI: http://sro.sussex.ac.uk/id/eprint/48391
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