Related Experiment Video
Updated: May 25, 2026
Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Antitumor efficacy of oncolytic herpes simplex virus adsorbed onto antigen-specific lymphocytes
A Kanzaki1, H Kasuya, K Yamamura
1Department of Surgery II, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Abstract:
Although several studies have reported that locally administering oncolytic viruses effectively targets malignancies, the efficacy of systemically administered oncolytic viruses is restricted. Recently, however, it was reported that systemic administration of oncolytic vesicular stomatitis virus adsorbed onto antigen-specific lymphocytes was effective against malignancies. We hypothesized that intravenously administering such virus might have significant potential in treatment of the malignant tumors. We adsorbed oncolytic herpes simplex virus-1 mutant R3616 onto lymphocytes harvested from mice with acquired antitumor immunity. We administered adsorbed R3616 to peritoneally disseminated tumors and analyzed the efficacy of this treatment. Mice administered adsorbed R3616 survived significantly longer than mice administered R3616 adsorbed onto non-specific lymphocytes, or mice administered either virus or tumor antigen-specific lymphocytes alone. In this context, herpes oncolytic virus is a promising treatment not only for primary lesions, but also for multiple metastasizing lesions. This treatment strategy may become one of the most effective methods for systemic virus delivery.
Insights
Systemic administration of oncolytic herpes simplex virus-1 adsorbed onto antigen-specific lymphocytes significantly improved survival in mice with disseminated tumors. This novel approach shows promise for treating metastatic cancers.
Area of Science:
- Oncolytic virotherapy
- Immunotherapy
- Cancer treatment
Background:
- Systemic administration of oncolytic viruses has limited efficacy against malignancies.
- Previous studies suggest oncolytic viruses adsorbed onto antigen-specific lymphocytes can be effective.
- Intravenous delivery of oncolytic viruses warrants further investigation for cancer treatment.
Purpose of the Study:
- To investigate the potential of systemically administered oncolytic herpes simplex virus-1 mutant R3616 adsorbed onto antigen-specific lymphocytes for treating malignant tumors.
- To evaluate the efficacy of this novel treatment strategy in a preclinical model.
Main Methods:
- Oncolytic herpes simplex virus-1 mutant R3616 was adsorbed onto lymphocytes from mice with acquired antitumor immunity.
- The adsorbed virus was administered intravenously to mice with peritoneally disseminated tumors.
- Survival rates were compared between groups receiving different treatments.
Main Results:
- Mice treated with R3616 adsorbed onto antigen-specific lymphocytes exhibited significantly longer survival.
- Control groups included mice treated with R3616 adsorbed onto non-specific lymphocytes, or with virus or lymphocytes alone.
- The treatment demonstrated efficacy against both primary and multiple metastatic lesions.
Conclusions:
- Systemic administration of oncolytic herpes simplex virus-1 adsorbed onto antigen-specific lymphocytes is a promising strategy for cancer treatment.
- This approach may overcome the limitations of traditional systemic oncolytic virotherapy.
- The findings suggest a potential for effective systemic virus delivery in treating disseminated and metastatic cancers.
Related Concept Videos
01:27Tumor Immunotherapy
01:27Cytotoxic T Cells-mediated Immune Response
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...
01:29Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...