<i>TREM1</i> rs2234237 (Thr25Ser) Polymorphism in Patients with Cutaneous Leishmaniasis Caused by <i>Leishmania guyanensis</i>: A Case-Control Study in the State of Amazonas, Brazil
José do Espírito Santo Júnior,
Tirza Gabrielle Ramos de Mesquita,
Luan Diego Oliveira da Silva,
Felipe Jules de Araújo,
Josué Lacerda de Souza,
Thaís Carneiro de Lacerda,
Lener Santos da Silva,
Cláudio Marcello da Silveira Júnior,
Krys Layane Guimarães Duarte Queiroz,
Diogo Matos dos Santos,
Cilana Chagas da Silva,
Héctor David Graterol Sequera,
Melissa Tamayo Hermida,
Mara Lúcia Gomes de Souza,
Marcus Vinitius de Farias Guerra,
Rajendranath Ramasawmy
Affiliations
José do Espírito Santo Júnior
Programa de Pós-Graduação em Imunologia Básica e Aplicada, Universidade Federal do Amazonas, Manaus 69080-900, AM, Brazil
Tirza Gabrielle Ramos de Mesquita
Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus 69040-000, AM, Brazil
Luan Diego Oliveira da Silva
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Felipe Jules de Araújo
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Josué Lacerda de Souza
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Thaís Carneiro de Lacerda
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Lener Santos da Silva
Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus 69040-000, AM, Brazil
Cláudio Marcello da Silveira Júnior
Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Manaus 69040-000, AM, Brazil
Krys Layane Guimarães Duarte Queiroz
Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Manaus 69040-000, AM, Brazil
Diogo Matos dos Santos
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Cilana Chagas da Silva
Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Manaus 69040-000, AM, Brazil
Héctor David Graterol Sequera
Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus 69040-000, AM, Brazil
Melissa Tamayo Hermida
Faculdade de Medicina Nilton Lins, Universidade Nilton Lins, Manaus 69058-030, AM, Brazil
Mara Lúcia Gomes de Souza
Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus 69040-000, AM, Brazil
Marcus Vinitius de Farias Guerra
Programa de Pós-Graduação em Medicina Tropical, Universidade do Estado do Amazonas, Manaus 69040-000, AM, Brazil
Rajendranath Ramasawmy
Programa de Pós-Graduação em Imunologia Básica e Aplicada, Universidade Federal do Amazonas, Manaus 69080-900, AM, Brazil
Background: Leishmaniasis is an infectious disease caused by Leishmania parasites. A Th1 immune response is necessary in the acute phase to control the pathogen. The triggering receptor expressed on myeloid cells (TREM)-1 is a potent amplifier of inflammation. Our aim is to identify whether the TREM1 variant rs2234237 A/T (Thr25Ser) is associated with the disease development of cutaneous leishmaniasis (CL) in Leishmania guyanensis-infected individuals. The effects of the rs2234237 genotypes on plasma cytokines IL-1β, IL-6, IL-8, IL-10, MCP-1 and TNF-α are also investigated. Methods: 838 patients with CL and 818 healthy controls (HCs) living in the same endemic areas were genotyped by Polymerase Chain Reaction-Restriction Fragment Length Polymorphism. Plasma cytokines were assayed in 400 patients with CL and 400 HCs using the BioPlex assay. Results: The genotypes’ and alleles’ frequencies were similar in both patients with CL (AA = 618, 74%; AT = 202, 24%; TT = 18, 2%) and in HCs (AA = 580, 71%; AT = 220, 27%; TT = 18, 2%). Rs2234237 showed a modest effect on plasma IL-10 that disappeared when correction of the p-value was applied. Plasma IL-10 by rs2234237 genotypes were (mean ± SEM; AA = 2.91 pg/mL ± 0.14; AT = 2.35 pg/mL ± 0.12; TT = 3.14 pg/mL ± 0.56; p = 0.05). Conclusion: The TREM1 rs2234237 (Thr25Ser) seems to have no influence on the susceptibility or resistance to L. guyanensis infections.
