| Grant number: | 14/17526-8 |
| Support Opportunities: | Regular Research Grants |
| Start date: | April 01, 2015 |
| End date: | September 30, 2017 |
| Field of knowledge: | Engineering - Biomedical Engineering - Medical Engineering |
| Principal Investigator: | Rondinelli Donizetti Herculano |
| Grantee: | Rondinelli Donizetti Herculano |
| Host Institution: | Faculdade de Ciências Farmacêuticas (FCFAR). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil |
| City of the host institution: | Araraquara |
| Associated researchers: | Bruno de Camargo Drago ; Felipe Azevedo Borges ; Matheus Carlos Romeiro Miranda |
| Associated research grant(s): | 15/11759-3 - Multi-User Equipment approved in grant 2014/17526-8: electron paramagnetic resonance (EPR) spectrometer - X band, AP.EMU |
Abstract
Natural Rubber Latex (NRL) has been proven excellent for its biocompatibility and ability to stimulate angiogenesis, cellular adhesion and the formation of extracellular matrix, promoting the replacement and regeneration of tissue. The aim of this project is to incorporate the extracts of Stryphnodendron sp, Casearia sylvestris Swartz and Cordia verbenacea in latex biomembranes and to study the extract delivery system behavior. Moreover, in this work these extracts will be loaded in metallic nanoparticles. Stryphnodendron sp, commonly known as barbatimão, is extensively used in folk medicine for the treatment of diarrhoea, gynaecological problems and for healing wounds. The Casearia sylvestris Sw., commonly known as "guaçatonga" and it is used by indigenous population from South America (Brazil, Peru and Bolivia) in the treatment of several diseases, including cancer. The Cordia Verbenacea DC. is an anti-inflammatory, anti-ulcer, anti-rheumatic and healing plant that has therapeutic properties and low toxicity, thanks to the action of the essential oil, which has the active ingredient alpha-humulene. Silver nanoparticles (AgNP), gold nanoparticles (AuNP) and magnetic nanoparticles (FeNP) are attracting attention due to their bactericidal properties, magnetic and carriers. Thus, in this work these extracts will be loaded in these metallic nanoparticles. For the extract release study, membranes with Stryphnodendron sp., C. sylvestris and C. verbenacea will be placed in 400 mL of SBF solution, where the release behavior will be observed. Aliquots of this solution will be collected during an interval ranging from 10 to 350 hours. The extracts release as a function of time will be determined using the UV-VIS method. The membranes with extracts load in nanoparticles will be characterized by XRD, FTIR, SEM and mechanical strength tests. In addition, cytotoxicity studies from fibroblast cells and pre-osteoblasts with samples will be analyzed. Finally, this project also will study the antioxidant capacity of extracts using the technique of electron paramagnetic resonance (EPR) and optical spectroscopy (UV-VIS) and quantification of phenols and total tannins of extracts (AU)
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