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Sato PK, Busser FD, Carvalho FMDC, Gomes Dos Santos A, Sadahiro A, Diogo CL, Kono ASG, Moretti ML, Luiz ODC, Shikanai-Yasuda MA. Polymorphism in the Promoter Region of the IL18 Gene and the Association With Severity on Paracoccidioidomycosis. Front Immunol 2020; 11:542210. [PMID: 33117339 PMCID: PMC7559583 DOI: 10.3389/fimmu.2020.542210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 08/21/2020] [Indexed: 01/06/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is an important endemic, systemic disease in Latin America caused by Paracoccidioides spp. This mycosis has been associated with high morbidity and sequels, and its clinical manifestations depend on the virulence of the infecting strain, the degree and type of immune response, infected tissues, and intrinsic characteristics of the host. The T helper(Th)1 and Th17/Th22 cells are related to resistance and control of infection, and a Th2/Th9 response is associated with disease susceptibility. In this study, we focused on interleukin(IL)-12p35 (IL12A), IL-18 (IL18), and IFN-γ receptor 1 (IFNGR1) genetic polymorphisms because their respective roles have been described in human PCM. Real-time PCR was employed to analyze IL12A-504 G/T (rs2243115), IL18-607 C/A (rs1946518), and IFNGR1-611 A/G (rs1327474) single nucleotide polymorphisms (SNP). One hundred forty-nine patients with the acute form (AF), multifocal chronic (MC), or unifocal chronic (UC) forms of PCM and 110 non-PCM individuals as a control group were included. In the unconditional logistic regression analysis adjusted by ethnicity and sex, we observed a high risk of the IL18-607 A-allele for both AF [p = 0.015; OR = 3.10 (95% CI: 1.24–7.77)] and MC groups [p = 0.023; OR = 2.61 (95% CI: 1.14–5.96)] when compared with UC. The IL18-607 A-allele associated risk for the AF and MC groups as well as the protective role of the C-allele in UC are possibly linked to higher levels of IL-18 at different periods of the course of the disease. Therefore, a novel role of IL18-607 C/A SNP is shown in the present study, highlighting its importance in the outcome of PCM.
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Affiliation(s)
- Paula Keiko Sato
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Institute of Tropical Medicine, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | - Felipe Delatorre Busser
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Institute of Tropical Medicine, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | - Flávia Mendes da Cunha Carvalho
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Department of Infectious and Parasitic Diseases, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | - Alexandra Gomes Dos Santos
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Department of Infectious and Parasitic Diseases, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | - Aya Sadahiro
- Department of Parasitology, Instituto de Ciências Biológicas, Federal University of Amazonas, Manaus, Brazil
| | - Constancia Lima Diogo
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Institute of Tropical Medicine, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | | | - Maria Luiza Moretti
- Faculdade de Ciências Médicas, Hospital das Clínicas, State University of Campinas, Campinas, Brazil
| | - Olinda do Carmo Luiz
- Department of Preventive Medicine, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
| | - Maria Aparecida Shikanai-Yasuda
- Laboratory of Medical Investigation in Immunology (LIM48), Faculdade de Medicina, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.,Institute of Tropical Medicine, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil.,Department of Infectious and Parasitic Diseases, Faculdade de Medicina, University of São Paulo, São Paulo, Brazil
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Polymorphisms on IFNG, IL12B and IL12RB1 genes and paracoccidioidomycosis in the Brazilian population. INFECTION GENETICS AND EVOLUTION 2016; 43:245-51. [PMID: 27223631 DOI: 10.1016/j.meegid.2016.05.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 04/07/2016] [Accepted: 05/17/2016] [Indexed: 01/16/2023]
Abstract
Paracoccidioidomycosis (PCM) is a systemic chronic mycosis, endemic in Latin America, especially Brazil, and is the eighth leading cause of death among chronic and recurrent infectious diseases. PCM infection is characterized by the presence of Th1 immune response; the acute form, by a mixed Th2/Th9, while the chronic form is characterized by Th17/Th22 profiles. The occurrence and severity of human PCM may also be associated with genetic factors such as single nucleotide polymorphisms (SNP) on cytokines encoding genes. We investigated the association between these polymorphisms and the different clinical forms of PCM. We included 156 patients with PCM (40 with the acute form, 99 with the chronic multifocal and 17 with the chronic unifocal form) and assayed their DNA samples for IFNG +874 T/A SNP by PCR-ARMS (Amplification Refractory Mutational System), IL12B +1188 A/C SNP on 3' UTR and IL12RB1 641 A/G SNP on exon 7 by PCR-RFLP (Restriction Fragment Length Polymorphism). We found similar genotypic and allelic frequencies of the investigated SNPs among the clinical forms of PCM. Considering male patients, the IL12RB1 641 AA genotype was more frequent in the chronic multifocal form while heterozygosis was in the chronic unifocal form of PCM (p=0.048). Although our data suggest that the AA genotype (IL12RB1) may be associated with the more disseminated chronic disease, more patients of the chronic unifocal PCM group need to be analyzed as well as the secretion patterns of IFN-γ combined with the IL-12Rβ1 expression for a better comprehension of this association.
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Sadahiro A, Roque ACM, Shikanai-Yasuda MA. Generic human leukocyte antigen class II (DRB1 and DQB1) alleles in patients with paracoccidioidomycosis. Med Mycol 2007; 45:35-40. [PMID: 17325942 DOI: 10.1080/13693780600999132] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Human leukocyte antigen (HLA) class II alleles are involved in antigen processing and in the presentation of antigens to T lymphocytes. Few studies have investigated HLA genes in paracoccidioidomycosis. In the present investigation, we analyzed the distribution of the HLA class II alleles DRB1 and DQB1 in 45 healthy volunteers and in 80 patients with paracoccidioidomycosis. The patients presented with various clinical forms of the disease, and allele distribution was evaluated individually in each presentation type. In patients with the unifocal chronic form of the disease, a mild clinical presentation in which lesions are restricted or localized, the HLA allele most commonly seen was DRB1*11 (p<0.039). This suggests that the participation of HLA antigens may influence the outcome of the host-parasite interaction in paracoccidioidomycosis, regulating the immune response to Paracoccidioides brasiliensis antigens.
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Affiliation(s)
- Aya Sadahiro
- Department of Parasitology, Federal University of Amazonas, Biological Sciences Institute, Manaus, Brazil
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