Photothermal Particle-Loaded Panax Notoginseng Polysaccharide Cryogels As Personalized Tumor Vaccines
Haifeng Ni1, Shijie Yu1, Sunxiang Qian1
1College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China.
Abstract:
Combination immunotherapy is being increasingly explored for cancer treatment, leading to various vector materials for the codelivery of immune agents and drugs. However, current tumor vaccines exhibit poor immunogenicity, severely compromising their therapeutic efficacy. Herein, an injectable hydrogel was developed based on dopamine (DA) and Panax notoginseng polysaccharide (PNPS) loaded with hair microparticles (HMPs) to enhance the immunogenicity of tumor vaccines. Photothermal effects of incorporated HMPs can trigger immunogenic cancer cell death and the release of abundant autologous tumor antigens, which are captured by catechol groups. Concomitant breakdown of PNPS recruits and activates dendritic cells (DCs). The macroporous structure of cryogels allows immune cell infiltration and interaction with antigens adsorbed on PNPS and DA cryogels (PD cryogels), thereby provoking potent cytotoxic T-cell responses. Hence, PD cryogels enabling cell infiltration and accelerated DC maturation may serve as a therapeutic vaccination platform against cancer.
Insights
This study introduces a novel injectable hydrogel for cancer immunotherapy. The hydrogel enhances tumor vaccine immunogenicity by triggering cell death and recruiting immune cells for a potent anti-cancer response.
Area of Science:
- Biomaterials Science
- Immunology
- Cancer Therapy
Background:
- Combination immunotherapy is a growing area in cancer treatment, but current tumor vaccines have limited effectiveness due to poor immunogenicity.
- Developing effective delivery systems for immune agents and drugs is crucial for improving therapeutic outcomes.
Purpose of the Study:
- To develop an injectable hydrogel platform for enhancing tumor vaccine immunogenicity and therapeutic efficacy.
- To investigate the potential of dopamine (DA) and Panax notoginseng polysaccharide (PNPS) based cryogels loaded with hair microparticles (HMPs) as a cancer vaccination strategy.
Main Methods:
- Fabrication of an injectable hydrogel using dopamine (DA) and Panax notoginseng polysaccharide (PNPS), loaded with hair microparticles (HMPs).
- Evaluation of the hydrogel's photothermal effects, antigen release, dendritic cell (DC) recruitment and activation, and immune cell infiltration.
- Assessment of the resulting cytotoxic T-cell responses.
Main Results:
- The developed hydrogel (PD cryogels) effectively triggers immunogenic cancer cell death and releases tumor antigens via photothermal effects of HMPs.
- PNPS breakdown facilitates the recruitment and activation of dendritic cells (DCs).
- The macroporous cryogel structure promotes immune cell infiltration and interaction, leading to potent cytotoxic T-cell responses.
Conclusions:
- The PD cryogels serve as an effective platform for cancer vaccination by enhancing immunogenicity.
- The hydrogel promotes cell infiltration and accelerates DC maturation, offering a promising therapeutic strategy against cancer.
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