Abstract:
:The gene polymorphisms interferon-gamma (IFN-gamma) +874 T/A and interleukin (IL)-4 -590 C/T have been associated with the altered production of cytokines. Therefore, they might be indicative of the occurrence of Paracoccidioidomycosis (PCM) caused by Paracoccidioides brasiliensis. The analysis of single nucleotide polymorphism (SNP) at position+874 IFN-gamma showed an increase occurrence of A/T genotype in both PCM patients and healthy individuals as control (HIC) (56% and 45%, respectively), while the allelic distribution showed 82% of A allele in the patients and 80% in the controls. The SNP of -590 IL-4 showed that C/T genotype was significantly (p<0.05) more prevalent (39%) in PCM group compared to the HIC group (19%), while IL-4 C/C genotype was significantly less frequent (59%) in the patient group compared to the control group (81%). Otherwise, 41% of PCM patients and 19% of HIC individuals carried the IL-4 T allele. Stimulation of peripheral blood mononuclear cells (PBMC) from PCM patients with cell extract antigenic preparations (PbAg) as well as secreted and surface antigens (MEXO) of P. brasiliensis evidenced that there is no difference in the IFN-gamma production related to A and T alleles between PCM and HIC individuals. However, with IL-4 production, PCM patients classified as C phenotype showed two times more IL-4 production than PCM patients classified as T phenotype and HIC controls. In conclusion, our results suggest that functional genetic variants in the IL-4 promoter could influence the production of IL-4 in PCM.
journal_name
Cytokinejournal_title
Cytokineauthors
Bozzi A,Reis BS,Pereira PP,Pedroso EP,Goes AMdoi
10.1016/j.cyto.2009.07.011subject
Has Abstractpub_date
2009-12-01 00:00:00pages
212-7issue
3eissn
1043-4666issn
1096-0023pii
S1043-4666(09)00195-1journal_volume
48pub_type
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