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Pelegrino MT, De Araujo Lima B, Do Nascimento MHM, Lombello CB, Brocchi M, Seabra AB. Biocompatible and Antibacterial Nitric Oxide-Releasing Pluronic F-127/Chitosan Hydrogel for Topical Applications. Polymers (Basel) 2018; 10:E452. [PMID: 30966487 PMCID: PMC6415216 DOI: 10.3390/polym10040452] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/08/2018] [Accepted: 04/16/2018] [Indexed: 01/08/2023] Open
Abstract
Nitric oxide (NO) is involved in physiological processes, including vasodilatation, wound healing and antibacterial activities. As NO is a free radical, designing drugs to generate therapeutic amounts of NO in controlled spatial and time manners is still a challenge. In this study, the NO donor S-nitrosoglutathione (GSNO) was incorporated into the thermoresponsive Pluronic F-127 (PL)-chitosan (CS) hydrogel, with an easy and economically feasible methodology. CS is a polysaccharide with known antimicrobial properties. Scanning electron microscopy, rheology and differential scanning calorimetry techniques were used for hydrogel characterization. The results demonstrated that the hydrogel has a smooth surface, thermoresponsive behavior and good mechanical stability. The kinetics of NO release and GSNO diffusion from GSNO-containing PL/CS hydrogel demonstrated a sustained NO/GSNO release, in concentrations suitable for biomedical applications. The GSNO-PL/CS hydrogel demonstrated a concentration-dependent toxicity to Vero cells, and antimicrobial activity to Pseudomonas aeruginosa (minimum inhibitory concentration and minimum bactericidal concentration values of 0.5 µg·mL-1 of hydrogel, which corresponds to 1 mmol·L-1 of GSNO). Interestingly, the concentration range in which the NO-releasing hydrogel demonstrated an antibacterial effect was not found to be toxic to the Vero mammalian cell. Thus, the GSNO-PL/CS hydrogel is a suitable biomaterial for topical NO delivery applications.
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Affiliation(s)
- Milena T Pelegrino
- Center for Natural and Human Sciences, Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP, CEP 09210-580, Brazil.
- Nanomedicine Research Unit (NANOMED), Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP 09210-580, Brazil.
| | - Bruna De Araujo Lima
- Tropical Disease Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, SP 13083-862, Brazil.
| | - Mônica H M Do Nascimento
- Nanomedicine Research Unit (NANOMED), Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP 09210-580, Brazil.
- Tropical Disease Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, SP 13083-862, Brazil.
| | - Christiane B Lombello
- Center for Natural and Human Sciences, Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP, CEP 09210-580, Brazil.
- Center for Engineering, Modeling and Applied Social Science, Universidade Federal do ABC, Alameda da Universidade sem numero, São Bernardo do Campo, SP, CEP 09606-045, Brazil.
| | - Marcelo Brocchi
- Tropical Disease Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, SP 13083-862, Brazil.
| | - Amedea B Seabra
- Center for Natural and Human Sciences, Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP, CEP 09210-580, Brazil.
- Nanomedicine Research Unit (NANOMED), Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP 09210-580, Brazil.
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