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Adhesion behavior of Pseudomonas aeruginosa and Staphylococcus aureus bacteria on nanostructured films based on chitosan: studies at the micro and nanoscales.

Grant number: 13/14888-3
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): January 01, 2014
Effective date (End): December 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Mônica Alonso Cotta
Grantee:Jesús Jacobo Hernández Montelongo
Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


An important line of research in bioactive materials aims specifically at obtaining coatings that provide antimicrobial resistant surfaces which are also non-toxic, biodegradable and suitable for contact with food or humans. This project intends to study the adhesion behavior of Pseudomonas aeruginosa and Staphylococcus aureus on the different types of nanostructured films based on chitosan deposited on glass slides. To achieve the desired antimicrobial activity, the process of cell adhesion should be better understood, taking into account the influence of the properties of biomaterials in scales of interest to the problem. Emphasis will be placed, during the development of this work, on techniques with spatial resolution (optical, confocal Raman, scanning probe and electron microscopy), since the use of this ensemble of spectroscopy and microscopy techniques have revealed important information about the behavior of biofilm formation as a function of bacterial adhesion and proliferation at micro and nanoscales. The results of the characterization will be correlated with the antimicrobial activity inferred from specific tests with micro-organisms of great importance for applications in the biomedical field. At the core of the development of technological innovation, we expect to incorporate frontier research in which interactions at the molecular level and surface properties are studied, making possible high impact scientific contributions.

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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)
HERNANDEZ-MONTELONGO, J.; CORRALES URENA, Y. R.; MACHADO, D.; LANCELLOTI, M.; PINHEIRO, M. P.; RISCHKA, K.; LISBOA-FILHO, P. N.; COTTA, M. A.. Electrostatic immobilization of antimicrobial peptides on polyethylenimine and their antibacterial effect against Staphylococcus epidermidis. COLLOIDS AND SURFACES B-BIOINTERFACES, v. 164, p. 370-378, . (15/16611-4, 13/14888-3)
HERNANDEZ-MONTELONGO, J.; NASCIMENTO, V. F.; HERNANDEZ-MONTELONGO, R.; BEPPU, M. M.; COTTA, M. A.. Fractal analysis of the formation process and morphologies of hyaluronan/chitosan nanofilms in layer-by-layer assembly. Polymer, v. 191, . (13/14888-3)
VAZ, JULIANA M.; TAKETA, THIAGO B.; HERNANDEZ-MONTELONGO, JACOBO; CHEVALLIER, PASCALE; COTTA, MONICA A.; MANTOVANI, DIEGO; BEPPU, MARISA M.. Antibacterial properties of chitosan-based coatings are affected by spacer-length and molecular weight. Applied Surface Science, v. 445, p. 478-487, . (13/14888-3, 10/51748-7, 13/10957-0, 13/05135-1)
HERNANDEZ-MONTELONGO, JACOBO; NICASTRO, GIANLUCCA G.; PEREIRA, THAYS DE O.; ZAVARIZE, MARIANA; BEPPU, MARISA M.; MACEDO, WALDEMAR A. A.; BALDINI, REGINA L.; COTTA, MONICA A.. Antibacterial effect of hyaluronan/chitosan nanofilm in the initial adhesion of Pseudomonas aeruginosa wild type, and IV pili and LPS mutant strains. SURFACES AND INTERFACES, v. 26, . (13/14888-3, 13/02375-1, 17/21235-7, 19/07616-3, 15/16611-4)

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