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Brasil LW, Barbosa LRA, de Araujo FJ, da Costa AG, da Silva LDO, Pinheiro SK, de Almeida ACG, Kuhn A, Vitor-Silva S, de Melo GC, Monteiro WM, de Lacerda MVG, Ramasawmy R. TOLLIP gene variant is associated with Plasmodium vivax malaria in the Brazilian Amazon. Malar J 2017; 16:116. [PMID: 28288644 PMCID: PMC5347824 DOI: 10.1186/s12936-017-1754-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 02/26/2017] [Indexed: 11/18/2022] Open
Abstract
Background Toll-interacting protein is a negative regulator in the TLR signaling cascade, particularly by impeding the TLR2 and, TLR4 pathway. Recently, TOLLIP was shown to regulate human TLR signaling pathways. Two common TOLLIP polymorphisms (rs5743899 and rs3750920) were reported to be influencing IL-6, TNF and IL-10 expression. In this study, TOLLIP variants were investigated to their relation to Plasmodium vivax malaria in the Brazilian Amazon. Methods This cohort study was performed in the municipalities of Careiro and, Manaus, in Western Brazilian Amazon. A total of 319 patients with P. vivax malaria and, 263 healthy controls with no previous history of malaria were included in the study. Genomic DNA was extracted from blood collected on filter paper, using the QIAamp® DNA Mini Kit, according to the manufacturer’s suggested protocol. The rs5743899 and rs3750920 polymorphisms of the TOLLIP gene were typed by PCR–RFLP. Results Homozygous individuals for the rs3750920 T allele gene had twice the risk of developing malaria when compared to individuals homozygous for the C allele (OR 2.0 [95% CI 1.23–3.07]; p = 0.004). In the dominant model, carriers the C allele indicates protection to malaria, carriers of the C allele were compared to individuals with the T allele, and the difference is highly significant (OR 0.52 [95% CI 0.37–0.76]; p = 0.0006). The linkage disequilibrium between the two polymorphisms was weak (r2 = 0.037; D′ = 0.27). Conclusions These findings suggest that genes involved in the TLRs-pathway may be involved in malaria susceptibility. The association of the TOLLIP rs3750920 T allele with susceptibility to malaria further provides evidence that genetic variations in immune response genes may predispose individuals to malaria.
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Affiliation(s)
- Larissa W Brasil
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Laila R A Barbosa
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil
| | - Felipe J de Araujo
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Allyson G da Costa
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Luan D O da Silva
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil
| | - Suzana K Pinheiro
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Anne C G de Almeida
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Andrea Kuhn
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil
| | - Sheila Vitor-Silva
- Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Gisely C de Melo
- Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Wuelton M Monteiro
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas (UEA), Manaus, AM, Brazil
| | - Marcus V G de Lacerda
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil.,Instituto de Pesquisas Leônidas & Maria Deane, FIOCRUZ, Manaus, AM, Brazil
| | - Rajendranath Ramasawmy
- Diretoria de Ensino e Pesquisa, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Av. Pedro Teixeira, 25-Dom Pedro, Manaus, Amazonas, CEP:69040-000, Brazil. .,Faculdade de Medicina, Universidade Nilton Lins, Manaus, AM, Brazil. .,Programa de Pós-Graduação em Imunologia Básica e Aplicada Universidade Federal do Amazonas (UFAM), Manaus, AM, Brazil.
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