Related Experiment Video

Updated: Sep 19, 2025

Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
11:44

Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo

Published on: September 18, 2014

9.0K

Intracellular Bacteria-Mimicking Whole-Cell Cancer Vaccine Potentiates Immune Responses via Concurrent Activation of

Xiaochun Xie1, Zikun Shen1, Yan He2

  • 1School of Medicine, South China University of Technology, Guangzhou, Guangdong 510006, China.

Nano Letters
|June 6, 2025
PubMed

Insights

Engineered whole-cell cancer vaccines mimic bacteria using bimineralization, enhancing immune cell interactions and anti-tumor responses. This novel approach improves vaccine efficacy for melanoma treatment.

Area of Science:

  • Biomaterials Science
  • Immunology
  • Cancer Therapy

Background:

  • Whole-cell cancer vaccines can induce broad anti-tumor immunity but suffer from low immunogenicity and poor antigen-presenting cell (APC) interaction.
  • Developing effective personalized immunotherapies requires overcoming these limitations.

Purpose of the Study:

  • To engineer whole-cell cancer vaccines with enhanced immunogenicity and APC recognition using a novel bimineralization strategy.
  • To investigate the immune response triggered by these engineered cells in a preclinical melanoma model.

Main Methods:

  • Tumor cells were engineered using layer-by-layer bimineralization, combining silicification and manganese mineralization.
  • The resulting bacteria-mimicking cells featured enhanced mechanical stiffness and rough MnO2 nanoclusters.
  • Immune activation was assessed by evaluating NLRP3 inflammasome and cGAS-STING pathway stimulation.

Main Results:

  • Bimineralized tumor cells demonstrated increased mechanical stiffness, protecting antigens from degradation and promoting APC phagocytosis.
  • Manganese mineralization created spiky nanoclusters that effectively stimulated the NLRP3 inflammasome and cGAS-STING pathways.
  • These engineered vaccines showed superior prophylactic and therapeutic effects against B16F10 melanoma in mice compared to monomineralized controls.

Conclusions:

  • Bimineralization is a transformative strategy for creating highly immunogenic whole-cell cancer vaccines.
  • This approach bridges materials science and immunology, offering a new framework for cancer immunotherapy development.
Keywords:
NLRP3 inflammasomebacteria-mimickingimmunotherapymineralizationwhole-cell cancer vaccines

More Related Videos

In Vivo Immunogenicity Screening of Tumor-Derived Extracellular Vesicles by Flow Cytometry of Splenic T Cells08:02

In Vivo Immunogenicity Screening of Tumor-Derived Extracellular Vesicles by Flow Cytometry of Splenic T Cells

Published on: September 23, 2021

2.7K
Experimental Melanoma Immunotherapy Model Using Tumor Vaccination with a Hematopoietic Cytokine09:15

Experimental Melanoma Immunotherapy Model Using Tumor Vaccination with a Hematopoietic Cytokine

Published on: February 24, 2023

3.6K

Related Concept Videos

Tumor Immunotherapy01:27

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
675
Cancer Vaccines01:30

Cancer Vaccines

Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
522
Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
3.9K
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
74.3K
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.5K
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
2.6K