PROPOLIS ACTION ON ANTIGEN PRESENTATION AND DIFFERENTIAL ACTIVATION OF HUMAN Th2 AND Th17 LYMPHOCYTES

• Grant number: 15/03409-2
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2016
• End date: February 28, 2019
• Field of knowledge: Biological Sciences - Pharmacology - Ethnopharmacology
• Principal Investigator: José Maurício Sforcin
• Grantee: Bruno Jose Conti
• Host Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

Propolis is a resinous product made by bees from different parts of plants, showing several pharmacological properties with possible application the pharmaceutical and food industry. Most of the papers on propolis and immunity were performed with animals and there are few studies with humans regarding its immunomodulatory action. Recently, we initiated the studies with human cells evaluating the effect of propolis in monocytes and dendritic cells and in this project we aim to investigate the cellular mechanisms modulated by propolis in antigen presentation and T lymphocyte differential activation. Thus, an infectious antigen (heat-labile enterotoxin B subunit from Escherichia coli), and lipopolysaccharide (LPS) will be used to assess the expression of cell receptors (TLR-2, TLR-4, HLA-DR, CD80, CD40), the activation of transcription factors (NF-kB and STAT-3) and cytokine production (TNF-±, IL-6 and IL-10) by monocytes. Lymphocyte proliferation, transcription factors (GATA-3 and ROR³t) activation and cytokine production (IL-4 and IL-17) by T lymphocytes will be analyzed as well, in order to investigate whether propolis could favor any activation profile, culminating preferentially in Th2 or Th17 one. We assume that a particular biological event could be favored by propolis, culminating for example in the humoral response (Th2) against extracellular antigens or in an inflammatory/autoimmune response (Th17). These findings will be original and relevant and this protocol may be adopted in vaccination schedules or treatment of inflammatory/autoimmune diseases, demonstrating the practical implication of this research project.

Scientific publications

(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)

B.J. CONTI; K.B. SANTIAGO; E.O. CARDOSO; F.L. CONTE; M.A. GOLIM; M.T. CRUZ; J.M. SFORCIN. Effect of propolis on Th2 and Th17 cells: interplay with EtxB- and LPS-treated dendritic cells. Brazilian Journal of Medical and Biological Research, v. 56, 2023-04-14. (15/03493-3, 15/03409-2)