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Updated: Jun 5, 2025

In Vivo Immunogenicity Screening of Tumor-Derived Extracellular Vesicles by Flow Cytometry of Splenic T Cells
Published on: September 23, 2021
Extracellular vesicles-based vaccines: Emerging immunotherapies against cancer
Yuhua Meng1, Zhimeng Yao2, Xiurong Ke3
1Department of General Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China; State Key Laboratory of Bioactive Molecules and Druggability Assessment, MOE Key Laboratory of Tumor Molecular Biology, and Institute of Precision Cancer Medicine and Pathology, School of Medicine, Jinan University, Guangzhou, Guangdong, China.
Abstract:
Cancer vaccines are promising therapeutic approaches to enhance specific T-cell immunity against most solid tumors. By stimulating anti-tumor immunity, clearing minimal residual disease, and minimizing adverse effects, these vaccines target tumor cells and are effective when combined with immune checkpoint blockade or other immunotherapies. However, the development of tumor cell-based vaccines faces quality issues due to poor immunogenicity, tumor heterogeneity, a suppressive tumor immune microenvironment, and ineffective delivery methods. In contrast, extracellular vesicles (EVs), naturally released by cells, are considered the ideal drug carriers and vaccine platforms. EVs offer highly organ-specific targeting, induce broader and more effective immune responses, and demonstrate superior tissue delivery ability. The development of EV vaccines is crucial for advancing cancer immunotherapy. Compared to cell-based vaccines, EV vaccines produced under Good Manufacturing Practices (GMP) offer advantages such as high safety, ease of preservation and transport, and a wide range of sources. This review summarizes the latest research findings on EV vaccine and potential applications in this field. It also highlights novel neoantigens for the development of EV vaccines against cancer.
Insights
Extracellular vesicle (EV) vaccines show promise for cancer immunotherapy, overcoming limitations of traditional cell-based vaccines. These novel EV vaccines offer improved targeting, immune response, and safety for treating solid tumors.
Area of Science:
- Oncology
- Immunotherapy
- Biotechnology
Background:
- Cancer vaccines aim to boost T-cell immunity against solid tumors, often combined with other therapies.
- Traditional tumor cell-based vaccines face challenges like poor immunogenicity and delivery issues.
- Extracellular vesicles (EVs) are emerging as superior platforms for drug delivery and vaccines.
Purpose of the Study:
- To review current research on extracellular vesicle (EV) vaccines for cancer immunotherapy.
- To highlight the advantages of EV vaccines over traditional cell-based vaccines.
- To discuss novel neoantigens for developing effective EV cancer vaccines.
Main Methods:
- Literature review of recent findings on EV vaccines in cancer research.
- Comparative analysis of EV vaccines versus cell-based vaccines.
- Exploration of EV properties for targeted delivery and immune response modulation.
Main Results:
- EVs offer organ-specific targeting, enhanced immune responses, and superior tissue delivery.
- EV vaccines demonstrate higher safety, easier preservation, and transport compared to cell-based vaccines.
- EVs can overcome challenges associated with tumor heterogeneity and the tumor immune microenvironment.
Conclusions:
- EV vaccines represent a significant advancement in cancer immunotherapy.
- EVs provide a versatile and effective platform for developing next-generation cancer vaccines.
- Further research into novel neoantigens will enhance the efficacy of EV-based cancer therapies.
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