Development of pH-responsive porphyran-coated gold nanorods for tumor photothermal and immunotherapy

Cancer poses a significant threat to human health, and monotherapy frequently fails to achieve optimal therapeutic outcomes. Based on this premise, porphyran (PHP), a marine polysaccharide with immunomodulatory function, was used as a framework to coat gold nanorods and construct a novel nanomedicin...

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Bibliographic Details
Published in:International journal of biological macromolecules 2024-08, Vol.275 (Pt 2), p.133460, Article 133460
Main Authors: Lin, Zhen, Nie, Fan, Hou, Jiantong, Guo, Xiaoyang, Gong, Xiaotang, Zhang, Linsu, Xu, Jing, Guo, Yuanqiang
Format: Article
Language:English
Subjects:
Animals
Apoptosis - drug effects
Cell Line, Tumor
Cell Proliferation - drug effects
Dendritic Cells - immunology
Gold - chemistry
Gold nanorods
Humans
Hydrogen-Ion Concentration
Immunotherapy
Immunotherapy - methods
Mice
Nanotubes - chemistry
Neoplasms - immunology
Neoplasms - therapy
pH responsiveness
Phototherapy - methods
Photothermal therapy
Photothermal Therapy - methods
Porphyran
Reactive Oxygen Species - metabolism
Sepharose - analogs & derivatives
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Summary:Cancer poses a significant threat to human health, and monotherapy frequently fails to achieve optimal therapeutic outcomes. Based on this premise, porphyran (PHP), a marine polysaccharide with immunomodulatory function, was used as a framework to coat gold nanorods and construct a novel nanomedicine (PHP-MPBA-GNRs) combining photothermal therapy and immunotherapy. In this design, PHP not only maintained the dispersion stability and photothermal stability of gold nanorods but also could be released under weakly acidic conditions to activate anti-tumor immunity. In vivo studies have shown that PHP-MPBA-GNRs can effectively inhibit tumor cell proliferation and reduce metastasis under near-infrared (NIR) light irradiation. Preliminary mechanistic investigations revealed that PHP-MPBA-GNRs could increase reactive oxygen species (ROS) and induce apoptosis in cancer cells. The PHP in PHP-MPBA-GNRs can also activate dendritic cells and up-regulate the expression of co-stimulatory molecules and antigen-presenting complexes. All biological experiments, including in vivo tests, demonstrated that PHP-MPBA-GNRs achieved a combination of photothermal therapy and immunotherapy for tumors. [Display omitted]
ISSN:0141-8130
1879-0003
1879-0003
DOI:10.1016/j.ijbiomac.2024.133460