Scholarlink

<p>Societies continue to face the urgent challenge of developing effective, safe, and stable nanoparticles with promising biomedical applications. Herein, the present study synthesis chitosan and L-Histidine dually coated titanium dioxide (TiCSLH) nanocomposite (NC) by chemical co-precipitation method. The antimicrobial performance of TiO₂ nanoparticles is closely linked to their physicochemical properties, such as reduced particle size, increased bandgap, and the presence of oxygen vacancies, all of which collectively enhance reactive oxygen species (ROS) generation and inhibit microbial growth. Structural analyses using XRD and TEM confirmed that TiCSLH nanoparticles possess an anatase phase and a spherical morphology. Compared to TiO₂, TiCSLH nanoparticles demonstrated significantly enhanced antimicrobial activity against <i>MRSA, E. coli, K. pneumoniae, P. aeruginosa</i> and <i>C. albicans</i> strains, as evidenced by larger zones of inhibition from 23–24&#xa0;mm. This enhanced efficacy is attributed to their smaller particle size (~ 26 ± 3&#xa0;nm), wider bandgap (3.34&#xa0;eV), and prominent oxygen vacancy-related emissions at 518 and 531&#xa0;nm, which facilitate increased ROS production, resulting in cellular membrane disruption and microbial death. Furthermore, compared to TiO<sub>2</sub>, TiCSLH exhibited notable anticancer potential against breast cancer cells, with an IC₅₀ of 10&#xa0;μg/mL, while maintaining excellent biocompatibility, as evidenced by its non-toxic response toward L929 fibroblast cells, which showed 83.5% cell viability. Collectively, these findings underscore the potential of TiCSLH nanoparticles for diverse biomedical applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Chitosan and L-histidine coated biofunctional TiO₂ composite with enhanced ROS-mediated antimicrobial and anticancer efficacy for biomedical applications

  • 期刊论文

  • 发表日期：

    2025年6月26日

查看全文
  • Indumathi Thangavelu,
  • Srinivas Tadepalli,
  • AbdulAziz A. AlGhamdi,
  • Thalakulam Shanmugam Boopathi

摘要

Societies continue to face the urgent challenge of developing effective, safe, and stable nanoparticles with promising biomedical applications. Herein, the present study synthesis chitosan and L-Histidine dually coated titanium dioxide (TiCSLH) nanocomposite (NC) by chemical co-precipitation method. The antimicrobial performance of TiO₂ nanoparticles is closely linked to their physicochemical properties, such as reduced particle size, increased bandgap, and the presence of oxygen vacancies, all of which collectively enhance reactive oxygen species (ROS) generation and inhibit microbial growth. Structural analyses using XRD and TEM confirmed that TiCSLH nanoparticles possess an anatase phase and a spherical morphology. Compared to TiO₂, TiCSLH nanoparticles demonstrated significantly enhanced antimicrobial activity against MRSA, E. coli, K. pneumoniae, P. aeruginosa and C. albicans strains, as evidenced by larger zones of inhibition from 23–24 mm. This enhanced efficacy is attributed to their smaller particle size (~ 26 ± 3 nm), wider bandgap (3.34 eV), and prominent oxygen vacancy-related emissions at 518 and 531 nm, which facilitate increased ROS production, resulting in cellular membrane disruption and microbial death. Furthermore, compared to TiO2, TiCSLH exhibited notable anticancer potential against breast cancer cells, with an IC₅₀ of 10 μg/mL, while maintaining excellent biocompatibility, as evidenced by its non-toxic response toward L929 fibroblast cells, which showed 83.5% cell viability. Collectively, these findings underscore the potential of TiCSLH nanoparticles for diverse biomedical applications.