Abstract
Periodontitis is a chronic inflammatory disease of the gums caused by pathogenic microorganisms damaging and destroying periodontal tissues. Chlorhexidine digluconate (CHX) is a commonly used antimicrobial agent for the treatment of periodontitis. However, it has many drawbacks, such as toxicity due to the high dosage required, low prolonged release, and low adhesion in the periodontal pocket. The objective of this study was to develop and optimize CHX-encapsulated polymeric nanoparticles (NPs) loaded into in situ gel-forming (ISGF) using design of experiment (DoE) to improve the treatment of periodontitis and overcome these limitations. CHX-NPs were optimized from 0.046%w/v chitosan, 0.05%w/w gelatin, and 0.25%w/w CHX. After that, the optimized of CHX-NPs was loaded into a thermosensitive ISGF, which was a mixture of 15%w/v Poloxamer 407 and 1% hydroxypropyl methylcellulose (HPMC). The optimized CHX-NPs, loaded into ISGF, was evaluated by measuring gelling temperature and time, pH, viscosity, compatibility, in vitro drug release, antibacterial activity, cytotoxicity, and stability. The results showed that the size, PDI, and zeta potential of optimized CHX-NPs were 53.07±10.17 nm, 0.36±0.02, and 27.63±4.16 mV, respectively. Moreover, the optimized ISGF loading CHX-NPs showed a gelling temperature at 34.3±1.2°C within 120.00±17.32 s with a pH value of 4.06. The viscosity of the formulations at 4°C was 54.33±0.99 cP. The DSC and FTIR showed no interaction between ingredients. The optimal formulations showed a prolonged release of up to 7 days while providing potential antibacterial activity and were safe for normal gingival fibroblast cells. Moreover, the formulations had high stability at 4°C and 25°C for 3 months. In conclusion, the study achieved the successful development of ISGF loading CHX-NPs formulations for effectiveness use in periodontal treatment.
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The authors would like to thank Mr. Paul Mines for proofreading.
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This research was financially supported by the National Research Council of Thailand (N42A650551), the Faculty of Pharmacy, Silpakorn University, and the Department of Pharmaceutical Technology, University of Applied Sciences (BHT), Germany.
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Phuvamin Suriyaamporn: methodology, software, validation, formal analysis, investigation, data curation, and writing—original draft preparation. Nitjawan Sahatsapan: methodology, validation, formal analysis, investigation, and data curation. Prasopchai Patrojanasophon: writing-review and editing. Praneet Opanasopit: conceptualization, resources, visualization, and funding acquisition. Mont Kumpugdee-Vollrath: conceptualization, resources, visualization, project administration, and funding acquisition. Tanasait Ngawhirunpat: visualization, supervision, and project administration. All authors have read and agreed to the published version of the manuscript.
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Suriyaamporn, P., Sahatsapan, N., Patrojanasophon, P. et al. Optimization of In Situ Gel-Forming Chlorhexidine-Encapsulated Polymeric Nanoparticles Using Design of Experiment for Periodontitis. AAPS PharmSciTech 24, 161 (2023). https://doi.org/10.1208/s12249-023-02600-0
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DOI: https://doi.org/10.1208/s12249-023-02600-0