Related Experiment Video
Updated: Aug 31, 2025

Concomitant Isolation of Primary Astrocytes and Microglia for Protozoa Parasite Infection
Published on: March 18, 2020
Anti-Tumor Effect of Parasitic Protozoans
Haojie Ding1, Songrui Wu1, Zi Jin1
1School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou 310059, China.
Abstract:
The immune system may aberrantly silence when against "altered self", which consequently may develop into malignancies. With the development of tumor immunology and molecular biology, the deepened understanding of the relationship between parasites and tumors shifts the attitude towards parasitic pathogens from elimination to utilization. In recent years, the antitumor impact implemented by protozoan parasites and the derived products has been confirmed. The immune system is activated and enhanced by some protozoan parasites, thereby inhibiting tumor growth, angiogenesis, and metastasis in many animal models. In this work, we reviewed the available information on the antitumor effect of parasitic infection or induced by parasitic antigen, as well as the involved immune mechanisms that modulate cancer progression. Despite the fact that clinical trials of the protozoan parasites against tumors are limited and the specific mechanisms of the effect on tumors are not totally clear, the use of genetically modified protozoan parasites and derived molecules combined with chemotherapy could be an important element for promoting antitumor treatment in the future.
Insights
Protozoan parasites can activate the immune system to fight tumors. Further research into parasitic antigens and modified parasites may lead to novel cancer treatments.
Area of Science:
- Immunology
- Molecular Biology
- Oncology
Background:
- The immune system's aberrant silencing against "altered self" can lead to malignancies.
- Understanding the relationship between parasites and tumors has shifted focus from elimination to utilization of parasitic pathogens.
Purpose of the Study:
- To review the antitumor effects of parasitic infection or parasitic antigen induction.
- To explore the immune mechanisms involved in modulating cancer progression by parasites.
Main Methods:
- Literature review of studies on parasitic infection and antitumor effects.
- Analysis of immune mechanisms modulating cancer progression.
Main Results:
- Protozoan parasites and their products demonstrate confirmed antitumor impact.
- Parasitic infections activate and enhance the immune system, inhibiting tumor growth, angiogenesis, and metastasis in animal models.
Conclusions:
- Despite limited clinical trials and unclear specific mechanisms, parasitic approaches show promise.
- Genetically modified protozoan parasites and derived molecules, combined with chemotherapy, represent a potential future direction for antitumor treatment.
More Related Videos
17:36Testing Protozoacidal Activity of Ligand-lytic Peptides Against Termite Gut Protozoa in vitro Protozoa Culture and in vivo Microinjection into Termite Hindgut
Published on: December 29, 2010
12:22A Parasite Rescue and Transformation Assay for Antileishmanial Screening Against Intracellular Leishmania donovani Amastigotes in THP1 Human Acute Monocytic Leukemia Cell Line
Published on: December 30, 2012
Related Concept Videos
Diversity of Protists II
Overview of Protists
Drugs that Destabilize Microtubules
Drugs that Stabilize Microtubules
Diversity of Protists I
Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...