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Variants in the promoter region of IKBL/NFKBIL1 gene may mark susceptibility to the development of chronic Chagas' cardiomyopathy among Trypanosoma cruzi-infected individuals.

Abstract：

:Chagas' disease, caused by Trypanosoma cruzi, is an inflammatory disorder leading to chronic Chagas cardiomyopathy (CCC). Only one third of T. cruzi-infected individuals progress to CCC while the others are considered asymptomatic (ASY). The human inhibitory kappaB-like gene (IKBL/NFKBIL1), homologous to the IkappaB family of proteins that regulate the NFkappaB family of transcription factors, is suggested as a putative inhibitor of NFkappaB. We investigated two functional polymorphisms, -62A/T and -262A/G, in the promoter of IKBL by PCR-RFLP analysis in 169 patients with CCC and 76 ASY. Genotype distributions for both -62A/T and -262A/G differed between the CCC and ASY (chi2=7.3; P=0.025 and chi2=6.8; P=0.03, respectively). Subjects, homozygous for the -62A allele, had three-fold risk of developing CCC compared with those carrying the TT genotype (P=0.0095; Odds Ratio [OR]=2.9; [95% CI 1.2-7.3]). Similar trend was observed for the -262A homozygotes (P=0.005; OR=2.7 [95% CI 1.3-6.0]. The haplotype -262A -62A was prevalent in patients with CCC (40% versus 24%; OR 2.1 [95% CI 1.4-3.3]; Pc=0.0014). The IKBL locus itself or another critical gene in this region may confer susceptibility to the development of CCC.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Ramasawmy R,Faé KC,Cunha-Neto E,Borba SC,Ianni B,Mady C,Goldberg AC,Kalil J

doi

10.1016/j.molimm.2007.04.015

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

283-8

issue

1

eissn

0161-5890

issn

1872-9142

pii

S0161-5890(07)00172-1

journal_volume

45

pub_type

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