No Associations of Human Pulmonary Tuberculosis with Sp110 Variants

Overview

Journal J Med Genet

Specialty Genetics

Date 2006 Jul 4

PMID 16816019

Citations 32

Authors

T Thye

E N Browne

M A Chinbuah

J Gyapong

I Osei

E Owusu-Dabo

S Niemann

S Rusch-Gerdes

R D Horstmann

C G Meyer

Affiliations

Soon will be listed here.

Abstract

Background: After a recent report on the role of the Ipr1 gene in mediating innate immunity in a mouse model of Mycobacterium tuberculosis infection, the human Ipr1 homologue, Sp110, was considered a promising candidate for an association study in human tuberculosis.

Methods: In a sample of >1000 sputum positive, HIV negative West African patients with pulmonary tuberculosis and >1000 exposed, apparently healthy controls, we have genotyped 21 Sp110 gene variants that were either available from public databases, including HapMap data, or identified by DNA re-sequencing.

Results: No significant differences in the frequencies of any of the 21 variants were observed between patients and controls. This applied also for HapMap tagging variants and the corresponding haplotypes, when including sliding window analyses with three adjacent variants, and when stratifying controls for positivity and negativity according to the results of intradermal tuberculin (purified protein derivative, PPD) skin tests. DNA re-sequencing revealed 13 novel Sp110 variants in the 5'-UTR, exons, and adjacent intronic regions.

Conclusions: Based on the results obtained in this case-control study, the hypothesis that Sp110 variants and haplotypes might be associated with distinct phenotypes of human M tuberculosis infection is doubtful.

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