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Effects of oral tolerance and tolerogenic dendritic cell administration on the immune response in experimental colitis

Grant number: 13/20258-2
Support type:Regular Research Grants
Duration: April 01, 2014 - September 30, 2016
Field of knowledge:Biological Sciences - Immunology
Principal Investigator:Patricia Ucelli Simioni
Grantee:Patricia Ucelli Simioni
Home Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Assoc. researchers:Paulo Pinto Joazeiro ; Wirla Maria da Silva Cunha Tamashiro

Abstract

Although the etiology of most autoimmune diseases is not known, the breakdown of immune tolerance to self-antigens is a generating mechanism common to these deleterious immune responses. Various strategies have been proposed to modulate the autoimmune responses, among which stand out the adoptive transfer of tolerogenic cells and/or treatment with regulatory cytokines. Moreover, several studies have shown that the ingestion of dietary protein antigens can generate indirect effects on the host immune system, characterized by suppressing immune response to antigenically unrelated proteins known as bystander suppression. Based on this assumption, we analyze the indirect effects of oral tolerance induced by the ingestion of ovalbumin (OVA) in TNBS -induced colitis, as well as the effects of adoptive transfer of tolerogenic dendritic cells to these animals. Still in the context of tolerance, current studies have indicated an important role of CTLA-4 molecule in the expression of indoleamine 2, 3-dioxygenase (IDO), an enzyme produced by dendritic cells, which acts on tryptophan and appears to exert a regulatory effect on the immune response. For this reason, we also evaluate the effects of the adoptive transfer of bone marrow derived dendritic cells (BMDCs) treated with CTLA-4-Ig or with IDO modulator. After treatment, the following parameters will be assessed: change in body weight; histology of target tissues; cell proliferation; cytokine production and expansion of CD25+ Foxp3+ regulatory T cells and TH17 cells in cultures of splenocytes. Our hypothesis is that the context generated by the immune response to antigens of the diet as well as modulation of IDO can reduce the damage observed in autoimmune diseases, both systemic and organ-specific. The mechanisms involved in reduction of damage may be related to the action of Treg cells, secretion of suppressive cytokines, and expression of IDO and costimulatory molecules. (AU)

Scientific publications (7)
(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)
DE ABREU, MARINA RODRIGUES; PEREIRA, MELISSA CAROLINA; SIMIONI, PATRICIA UCELLI; NODARI, ELEN FERNANDA; PAIATTO, LISIERY NEGRINI; CAMARGO-MATHIAS, MARIA IZABEL. Immunomodulatory and morphophysiological effects of Rhipicephalus sanguineus s. l. (Acari: Ixodidae) salivary gland extracts. VETERINARY IMMUNOLOGY AND IMMUNOPATHOLOGY, v. 207, p. 36-45, JAN 2019. Web of Science Citations: 2.
SILVA, FERNANDA G. D. E.; PAIATTO, LISIERY N.; YAMADA, AUREO T.; NETTO, FLAVIA M.; SIMIONI, PATRICIA U.; TAMASHIRO, WIRLA M. S. C. Intake of Protein Hydrolysates and Phenolic Fractions Isolated from Flaxseed Ameliorates TNBS-Induced Colitis. MOLECULAR NUTRITION & FOOD RESEARCH, v. 62, n. 17 SEP 2018. Web of Science Citations: 3.
PAIATTO, LISIERY N.; SILVA, FERNANDA G. D.; YAMADA, AUREO T.; TAMASHIRO, WIRLA M. S. C.; SIMIONI, PATRICIA U. Adoptive transfer of dendritic cells expressing CD11c reduces the immunological response associated with experimental colitis in BALB/c mice. PLoS One, v. 13, n. 5 MAY 8 2018. Web of Science Citations: 0.
PAIATTO, LISIERY N.; SILVA, FERNANDA G. D.; BIER, JULIA; BROCHETTO-BRAGA, MARCIA R.; YAMADA, AUREO T.; TAMASHIRO, WIRLA M. S. C.; SIMIONI, PATRICIA U. Oral Tolerance Induced by OVA Intake Ameliorates TNBS-Induced Colitis in Mice. PLoS One, v. 12, n. 1 JAN 18 2017. Web of Science Citations: 3.
FRANCOSO, ALEX; SIMIONI, PATRICIA UCELLI. Immunotherapy for the treatment of colorectal tumors: focus on approved and in-clinical-trial monoclonal antibodies. DRUG DESIGN DEVELOPMENT AND THERAPY, v. 11, p. 177-184, 2017. Web of Science Citations: 6.
SILVA, ANA P. S.; COELHO, PRISCILA V.; ANAZETTI, MARISTELLA; SIMIONI, PATRICIA U. Targeted therapies for the treatment of non-small-cell lung cancer: Monoclonal antibodies and biological inhibitors. HUMAN VACCINES & IMMUNOTHERAPEUTICS, v. 13, n. 4, p. 843-853, 2017. Web of Science Citations: 9.
RAMOS DE MATTOS, BRUNO RAFAEL; GRACINDO GARCIA, MAELLIN PEREIRA; NOGUEIRA, JULIA BIER; PAIATTO, LISIERY NEGRINI; ALBUQUERQUE, CASSIA GALDINO; SOUZA, CAIQUE LOPES; ROMANI FERNANDES, LUIS GUSTAVO; DA SILVA CUNHA TAMASHIRO, WIRLA MARIA; SIMIONI, PATRICIA UCELLI. Inflammatory Bowel Disease: An Overview of Immune Mechanisms and Biological Treatments. Mediators of Inflammation, 2015. Web of Science Citations: 47.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.