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Updated: Feb 4, 2026

A Brain Tumor/Organotypic Slice Co-culture System for Studying Tumor Microenvironment and Targeted Drug Therapies
Published on: November 7, 2015
Targeting PVR (CD155) and its receptors in anti-tumor therapy
Paola Kučan Brlić1, Tihana Lenac Roviš2, Guy Cinamon3
1Center for Proteomics, Faculty of Medicine, University of Rijeka, Braće Branchetta 20, 51 000, Rijeka, Croatia. paola.kucan@uniri.hr.
Abstract:
Poliovirus receptor (PVR, CD155) has recently been gaining scientific interest as a therapeutic target in the field of tumor immunology due to its prominent endogenous and immune functions. In contrast to healthy tissues, PVR is expressed at high levels in several human malignancies and seems to have protumorigenic and therapeutically attractive properties that are currently being investigated in the field of recombinant oncolytic virotherapy. More intriguingly, PVR participates in a considerable number of immunoregulatory functions through its interactions with activating and inhibitory immune cell receptors. These functions are often modified in the tumor microenvironment, contributing to tumor immunosuppression. Indeed, increasing evidence supports the rationale for developing strategies targeting these interactions, either in terms of checkpoint therapy (i.e., targeting inhibitory receptors) or in adoptive cell therapy, which targets PVR as a tumor marker.
Insights
Poliovirus receptor (PVR, CD155) is highly expressed in cancers, driving tumor growth and immune suppression. Targeting PVR offers new therapeutic strategies in tumor immunology and oncolytic virotherapy.
Area of Science:
- Immunology
- Oncology
- Virology
Background:
- Poliovirus receptor (PVR, CD155) has significant roles in both endogenous and immune functions.
- PVR is overexpressed in various human malignancies, suggesting a protumorigenic role.
- PVR interacts with immune cell receptors, modulating immune responses within the tumor microenvironment.
Purpose of the Study:
- To explore the therapeutic potential of targeting Poliovirus receptor (PVR, CD155) in cancer treatment.
- To investigate the role of PVR in tumor immunology and its implications for immunotherapy.
- To examine PVR's involvement in recombinant oncolytic virotherapy.
Main Methods:
- Review of scientific literature on PVR's function in cancer and immunology.
- Analysis of PVR expression patterns in healthy tissues versus malignancies.
- Examination of PVR's interactions with immune cell receptors and their functional consequences.
Main Results:
- PVR exhibits protumorigenic properties and is a target of interest in oncolytic virotherapy.
- PVR interactions with immune receptors are altered in the tumor microenvironment, promoting immunosuppression.
- Targeting PVR-mediated immune interactions is a promising strategy for cancer immunotherapy.
Conclusions:
- PVR is a significant therapeutic target in tumor immunology.
- Strategies targeting PVR interactions hold promise for checkpoint therapy and adoptive cell therapy.
- Further research into PVR's role can advance cancer treatment modalities.
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