TY - JOUR KW - leprosy KW - Genetic aspects KW - Nod2 Signaling Adaptor Protein KW - Brazil AU - Sales-Marques C AU - Salomão H AU - Fava VM AU - Alvarado-Arnez LE AU - Amaral EP AU - Cardoso C AU - Dias-Batista IMF AU - Silva WL AU - Medeiros P AU - Cunha Lopes Virmond M AU - Lana FCF AU - Pacheco A AU - Moraes M AU - Mira M AU - Latini A AB -

Leprosy is a complex disease with phenotypes strongly influenced by genetic variation. A Chinese genome-wide association study (GWAS) depicted novel genes and pathways associated with leprosy susceptibility, only partially replicated by independent studies in different ethnicities. Here, we describe the results of a validation and replication study of the Chinese GWAS in Brazilians, using a stepwise strategy that involved two family-based and three independent case-control samples, resulting in 3,614 individuals enrolled. First, we genotyped a family-based sample for 36 tag single-nucleotide polymorphisms (SNPs) of five genes located in four different candidate loci: CCDC122-LACC1, NOD2, TNFSF15 and RIPK2. Association between leprosy and tag SNPs at NOD2 (rs8057431) and CCDC122-LACC1 (rs4942254) was then replicated in three additional, independent samples (combined ORAA = 0.49, P = 1.39e-06; ORCC = 0.72, P = 0.003, respectively). These results clearly implicate the NOD2 pathway in the regulation of leprosy susceptibility across diverse populations.

BT - Human genetics C1 - http://www.ncbi.nlm.nih.gov/pubmed/25367361?dopt=Abstract DO - 10.1007/s00439-014-1502-9 IS - 12 J2 - Hum. Genet. LA - eng N2 -

Leprosy is a complex disease with phenotypes strongly influenced by genetic variation. A Chinese genome-wide association study (GWAS) depicted novel genes and pathways associated with leprosy susceptibility, only partially replicated by independent studies in different ethnicities. Here, we describe the results of a validation and replication study of the Chinese GWAS in Brazilians, using a stepwise strategy that involved two family-based and three independent case-control samples, resulting in 3,614 individuals enrolled. First, we genotyped a family-based sample for 36 tag single-nucleotide polymorphisms (SNPs) of five genes located in four different candidate loci: CCDC122-LACC1, NOD2, TNFSF15 and RIPK2. Association between leprosy and tag SNPs at NOD2 (rs8057431) and CCDC122-LACC1 (rs4942254) was then replicated in three additional, independent samples (combined ORAA = 0.49, P = 1.39e-06; ORCC = 0.72, P = 0.003, respectively). These results clearly implicate the NOD2 pathway in the regulation of leprosy susceptibility across diverse populations.

PY - 2014 SP - 1525 EP - 32 T2 - Human genetics TI - NOD2 and CCDC122-LACC1 genes are associated with leprosy susceptibility in Brazilians. VL - 133 SN - 1432-1203 ER -