@article{81, keywords = {Brazil, Ethnic Groups, Female, Gene Frequency, genotype, Humans, Interleukin-10, leprosy, Male, polymerase chain reaction, Polymorphism, Genetic, Polymorphism, Single Nucleotide, Reference Values, Tumor Necrosis Factor-alpha}, author = {Franceschi DSA and Mazini PS and Rudnick CCC and Sell AM and Tsuneto LT and Ribas ML and Peixoto PR and Visentainer JEL}, title = {Influence of TNF and IL10 gene polymorphisms in the immunopathogenesis of leprosy in the south of Brazil.}, abstract = {

OBJECTIVE: To determine whether cytokine polymorphisms are associated with leprosy and/or their subtypes in a Brazilian population.

METHODS: Genotyping using polymerase chain reaction with sequence-specific primers (PCR-SSP) was performed for: TNF(-308/-238), IL2(-330/+166), IL6(-174), IFNG(+874), TGFB1(+869/+915), and IL10(-592/-819/-1082) in 240 healthy controls and 167 patients with leprosy.

RESULTS: For TNF(-308), a higher frequency of GG genotype (85.5% vs. 74.1% in healthy controls, p = 0.009), along with a decreased frequency of GA/AA genotypes was observed among leprosy patients as compared to the control group (14.5% vs. 25.9%, p = 0.009). The GG genotype was particularly higher in patients with tuberculoid (TT) and borderline (BB) leprosy (90.5% and 89.8%, respectively). Analysis of IL10 genotypes revealed a lower frequency of GCC/GCC haplotype in lepromatous leprosy (LL) patients (6.2%) in comparison to controls (15.4%).

CONCLUSION: It is suggested that the G-->A substitution at position -308 in the TNF promoter region plays an important role in leprosy patients.

}, year = {2009}, journal = {International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases}, volume = {13}, pages = {493-8}, month = {2009 Jul}, issn = {1878-3511}, doi = {10.1016/j.ijid.2008.08.019}, language = {eng}, }