The role of miRNA in Leishmania infantum infection in mononuclear cells and spleen leukocytes from peripheral blood of dog

• Grant number: 15/16972-7
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2016
• End date: September 30, 2018
• Field of knowledge: Biological Sciences - Immunology - Applied Immunology
• Principal Investigator: Valéria Marçal Felix de Lima
• Grantee: Valéria Marçal Felix de Lima
• Host Institution: Faculdade de Medicina Veterinária (FMVA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil
• Associated researchers: Flavia Lombardi Lopes

Abstract

The visceral leishmaniasis (VL) in man is a chronic and often fatal disease if left untreated and is booming with an increase also in the state of São Paulo. According to Secretary of Epidemiological Surveillance of the State of São Paulo, the disease is expanding with high mortality rate, and the Araçatuba region concentrates a large number of infected people. The canine VL is a serious public health problem, because the infected animals are potent transmitters of the parasite to humans by the vector and canine disease is more prevalent than the human disease, usually canines cases precede human cases. The dog is therefore an important target in the control measures. The progression of canine infection is accompanied by a failure of cellular immunity in reducing circulating lymphocytes and cytokines that suppress macrophage function. The function of the T cell in the cellular response is decisive for elimination of the parasite in macrophages. Although immune suppression is already characterized, the determining factors are not well known. In the last decade studies have shown that regulation of effector function of macrophages and T cells appears to depend miRNAs. There are many evidences of the role of miRNA in regulating the expression of proteins that are critical for the development, function and differentiation of various cell types of the immune system. A deregulation of expression of the miRNA is involved in a variety of disorders including visceral leishmaniasis. In LVC cell immune suppression due to be determinant of disease progression, knowledge of miRNAs associated with immune regulation may be important for the response pattern of change. The objective of this research is to improve our understanding of the pathogenesis of visceral leishmaniasis in the host, and as such reveal new paths that can be therapeutic targets. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BRAGATO, JAQUELINE POLETO; MELO, LARISSA MARTINS; VENTURIN, GABRIELA LOVIZUTTO; REBECH, GABRIELA TORRES; GARCIA, LEANDRO ENCARNACAO; LOPES, FLAVIA LOMBARDI; FELIX DE LIMA, VALERIA MARCAL. Data on differentially expressed miRNAs in dogs infected with Leishmania infantum. DATA IN BRIEF, v. 17, p. 218-225, APR 2018. (15/16972-7, 16/02359-4)

BRAGATO, JAQUELINE POLETO; MELO, LARISSA MARTINS; VENTURIN, GABRIELA LOVIZUTTO; REBECH, GABRIELA TORRES; GARCIA, LEANDRO ENCARNACAO; LOPES, FLAVIA LOMBARDI; FELIX DE LIMA, VALERIA MARCAL. Relationship of peripheral blood mononuclear cells miRNA expression and parasitic load in canine visceral leishmaniasis. PLoS One, v. 13, n. 12, DEC 5 2018. (15/16972-7, 16/02359-4, 15/16101-6)

MELO, LARISSA MARTINS; BRAGATO, JAQUELINE POLETO; VENTURIN, GABRIELA LOVIZUTTO; REBECH, GABRIELA TORRES; COSTA, SIDNEI FERRO; GARCIA, LEANDRO ENCARNACAO; LOPES, FLAVIA LOMBARDI; EUGENIO, FLAVIA DE REZENDE; PATTO DOS SANTOS, PAULO SERGIO; FELIX DE LIMA, VALERIA MARCAL. Induction of miR 21 impairs the anti-Leishmania response through inhibition of IL-12 in canine splenic leukocytes. PLoS One, v. 14, n. 12, DEC 11 2019. (18/16239-6, 15/16972-7, 15/16101-6)

SOARES, MATHEUS FUJIMURA; MELO, LARISSA MARTINS; BRAGATO, JAQUELINE POLETO; FURLAN, AMANDA DE OLIVEIRA; SCARAMELE, NATALIA FRANCISCO; LOPES, FLAVIA LOMBARDI; FELIX DE LIMA, VALERIA MARCAL. Differential expression of miRNAs in canine peripheral blood mononuclear cells (PBMC) exposed to Leishmania infantum in vitro. Research in Veterinary Science, v. 134, p. 58-63, JAN 2021. (15/16101-6, 15/16972-7)