Thermogelling chitosan-based polymers for the treatment of oral mucosa ulcers
Abstract
Current treatments for oral mucosa-related ulcers use drugs to relieve pain and promote healing, but rarely consider drug resistance to bacterial infection in the microenvironment of the oral cavity or the prevention of bleeding from gingival mucosa ulcers. We herein report an injectable, thermogelling chitosan-based system to address these concerns. An aqueous solution of chitosan-based conjugates (chitosan-g-poly(N-isopropylacrylamide) [CS-g-PNIPAAM] including 1a [CS-g-PNIPAAM with less PNIPAAM] and 1b [CS-g-PNIPAAM with more PNIPAAM], and chitosan-g-poly(N-isopropylacrylamide)-g-polyacrylamide [CS-g-PNIPAAM-g-PAM] 3) could reversibly form semi-solid gels at physiological temperatures for easy application to oral cavity ulcer sites by injection. The chitosan-based conjugate thermogels prepared could inhibit both Gram-positive and Gram-negative bacteria and the two with higher chitosan and poly(N-isopropylacrylamide) contents (1a and 1b) promoted proliferation of gingival fibroblasts in vitro. These two thermogels also exhibited improved blood clotting in an in vivo rat study. Thermogels 1a and 1b effectively promoted ulcer healing and shortened ulcer healing times in an oral gingival mucosa ulcer model using Sprague Dawley (SD) rats. These thermogels showed no obvious toxicity to the main organs of SD rats undergoing gingival ulcer treatment. These results suggest that this antibacterial biomaterial could be a promising injectable therapeutic agent for the treatment for oral mucosa ulcers.
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Albumin particles containing the anti-inflammatory piroxicam have been reported to increase bioavailability by 1.8-fold upon topical ocular administration in rabbits compared with standard commercial eyedrops.
“Albumin particles containing the anti-inflammatory piroxicam have been reported to increase bioavailability by 1.8-fold upon topical ocular administration in rabbits compared with standard commercial eyedrops [96].”
From From design to Deployment: The innovative role of nanomicelles in targeted ophthalmic therapeutics (2025) · cites this paper as [96]
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Self-citation
- Authors
- Luo, Z., Xue, K., Zhang, X., Lim, J. Y. C., Lai, X., Young, D. J., Zhang, Z.-X., Wu, Y.-L., & Loh, X. J.
- Affiliations
- Xiamen University (CN)
- Agency for Science, Technology and Research (SG)
- Charles Darwin University (AU)
- Corresponding author
- Zhang, Zhong-Xing
- Wu, Yun-Long
- Loh, Xian Jun
- Venue
- Biomaterials Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2020
- Volume
- 8
- Issue
- 5
- Pages
- 1364-1379
- ISSN
- 2047-4830 (ISSN-L)
- 2047-4849
- OpenAlex
- W2998551865
- Cited by
- 67
- References
- 79
- Citations by year
- 2026: 9 · 2025: 7 · 2024: 9 · 2023: 9 · 2022: 14 · 2021: 10 · 2020: 9
- FWCI
- 2.86
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biomaterials Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
- Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
- Keywords
- thermosensitive hydrogel, chitosan, poly(N-isopropylacrylamide), gingival ulcer, antibacterial biomaterials, injectable therapy, ulcer healing, coagulation, polyacrylamide, oral bacterial infections
- MeSH terms
- Animals, Anti-Ulcer Agents, Anti-Bacterial Agents, Cell Line, Cell Survival, Escherichia coli, Gels, Humans, Microbial Sensitivity Tests, Mouth Mucosa, Polymers, Staphylococcus aureus, Temperature, Ulcer, Rats, Sprague-Dawley, Chitosan, Rats
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