Bonete JM, Tamashiro JR, Paiva FFGD, Queiroz-Fernandes GMD, Guidelli É, Baffa O, Kinoshita A. Influence of silver nanoparticles on the tissue reaction of polyacrylic acid-based gel.
Acta Cir Bras 2022;
37:e370504. [PMID:
35976341 PMCID:
PMC9377206 DOI:
10.1590/acb370504]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 04/20/2022] [Indexed: 11/22/2022] Open
Abstract
Purpose:
To study the influence of silver nanoparticles (AgNP) on tissue reaction when incorporated into a polymeric matrix of polyacrylic acid-based (Carbopol®) gel as a proposal for a new low-cost type of biomaterial that is simple to manufacture for use as an antimicrobial and antioxidative dressing.
Methods:
In-vivo tests of implantation in the subcutaneous tissue of the back of rats were performed using polyethylene tubes in three situations: empty, only the gel, and gel incorporated with AgNP. Then, the tissue reaction was studied by counting inflammatory cells. Additionally, in-vitro tests of the antioxidative and antimicrobial activity of AgNP were performed. The radical 2,2 diphenyl-1 picrylhydrazyl (DPPH) was used to test the antioxidative activity of AgNP using electron spin resonance. The antimicrobial activity of AgNP was determined by minimum inhibitory concentration against the microorganisms: Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli.
Results:
The results indicated that AgNP presents antioxidative activity and was able to inhibit the growth of the microorganisms tested. The addition of AgNP in Carbopol® did not alter the tissue inflammatory response (p>0.05, Kruskal-Wallis’s test).
Conclusions:
The new biomaterial is promising for future use as a dressing for its beneficial properties for regenerative processes.
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