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Poly(vinyl alcohol) films functionalized with SNO groups for the topical treatment of lesions

Grant number: 13/21936-4
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2014
Effective date (End): April 30, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Marcelo Ganzarolli de Oliveira
Grantee:Karen Slis Raggio Santos
Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


The topical application of nitric oxide (NO) releasing biomaterials has shown promising results for accelerating wound healing, especially in chronic ulcers. NO-releasing hydrogels have already shown effective action in the acceleration of wound healing in both inflammatory and proliferative phases. In addition, several works describe beneficial actions resulting from simply coating lesions with hydrophilic polymeric films. The objectives of this project are the preparation and characterization of hydrophylic poly(vinyl alcohol) (PVA) films functionalized with NO donor SNO groups and their topical applications for the promotion of dermal vasodilation in the health skin and for the wound healing in animal model. PVA will be functionalized with SNO groups through its esterification reaction with sulfhydrylated carboxylic acids, followed by S-nitrosation of the SH groups. The films, prepared by casting, will be characterized relative to their NO charge and the kinetics of NO release in physiological medium, using spectrophotometric and chemiluminescence techniques. The dermal vasodilation action of the films will be evaluated by laser Doppler flowmetry and the films will also be used in a in a wound healing animal model study using Swiss mice, in collaboration with Prof. Andrea Monte Alto Costa, from the Department of Histology and Embryology of the UFRJ. The in vitro kinetic data of NO release will be correlated with the in vivo vasodilation and wound healing results, in order to select the formulations with potential for clinical use. (AU)

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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)
SCHANUEL, FERNANDA SEABRA; RAGGIO SANTOS, KAREN SLIS; MONTE-ALTO-COSTA, ANDREA; DE OLIVEIRA, MARCELO G.. Combined nitric oxide-releasing poly(vinyl alcohol) film/F127 hydrogel for accelerating wound healing. COLLOIDS AND SURFACES B-BIOINTERFACES, v. 130, p. 182-191, . (13/21936-4, 08/57560-0)

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