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Daneshyar F, Alikhani M Y, Tayebi S, Abedi Firouzjaei D. Evaluation of the Antibacterial and Anti-Biofilm Activity of Chitosan-Arginine Nanoparticles and Sodium Fluoride against Streptococcus mutans. Int J Mol Cell Med 2025;
URL: http://ijmcmed.org/article-1-2520-en.html
1- Department of Pediatric dentistry, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
2- Infectious disease research center, Avicenna Institute of Clinical Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
3- Department of Pediatric dentistry, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran , abedidelaram@yahoo.com
Abstract:   (43 Views)

Dental caries is among the most prevalent chronic diseases. It arises from bacterial biofilm formation on tooth surfaces due to metabolic activity. Streptococcus mutans (S. mutans) is a key pathogen implicated in the development of dental caries. As bacterial resistance to conventional treatments increases, there is a growing interest in using novel compounds that possess antibacterial and antibiofilm properties. This study evaluated the effect of chitosan-arginine nanoparticles (CS-Arg NPs) and sodium fluoride (NaF) on inhibiting S. mutans' growth. After synthesizing CS-Arg NPs, their size, morphology, and chemical structure were evaluated. The broth microdilution method determined the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of CS-Arg NPs and NaF. The combined antibacterial and antibiofilm effect of CS-Arg NPs and NaF was assessed using the checkerboard method. The CS-Arg NPs had an average size of 269.9 nm with a zeta potential of +38.3 mV. The MIC of S. mutans for CS-Arg NPs and NaF was 312 µg/mL and 625 µg/mL, respectively, and the MBC for these NPs and NaF was 625 µg/mL and 2500 µg/mL, respectively. The fractional inhibitory concentration index (FICI) of the combination of CS-Arg NPs and NaF showed an additive effect (FICI = 1). The inhibitory effect of different concentrations of CS-Arg NPs and NaF, alone or in combination, on biofilm formation in the studied strain ranged from approximately 12% to 81%. This study demonstrated that CS-Arg NPs have antibacterial and antibiofilm properties against S. mutans, and their combination with NaF can enhance these antibacterial effects. These findings suggest that CS-Arg NPs and NaF, as a novel combination, could effectively develop oral hygiene products.
 

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Type of Study: Original Article | Subject: Infectious disease (Molecular and Cellular aspects)
Received: 2024/12/28 | Accepted: 2025/03/3 | Published: 2025/04/12

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