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Lighting the Way
Toward Antitumor Immunity
Lighting the Way
Toward Antitumor Immunity

Istari’s Lerapolturev (formerly PVSRIPO)—Elevating the Standard of Cancer Care With a Multifaceted Approach to Ignite a Systemic Anticancer Response

Lerapolturev Lighting the Way

Immune checkpoint inhibitors have revolutionized cancer therapy, but their success is limited by a lack of preexisting anticancer T cells or the inability of anticancer T cells to overcome the immunosuppressive tumor microenvironment.

Various approaches to overcoming these challenges have been investigated, but the complexity of the immune system suggests that intervention at multiple points is required to effectively activate antitumor immunity.

Lerapolturev—a Unique Immune Activator With Multiple Mechanisms to Stimulate a Powerful Anticancer Response

The ONLY immune activator based on the poliovirus
Because it is based on the live attenuated Sabin type 1 oral polio vaccine and polio vaccination is nearly universal, lerapolturev leverages the powerful memory response against polio to amplify the anticancer immune response.
The ONLY immune activator to target solid tumors via CD155
Because CD155, the poliovirus receptor, is present on virtually all solid tumor types, lerapolturev offers remarkable potential across a wide range of solid tumors. Lerapolturev exhibits direct antitumor cytotoxic effects.
The ONLY immune activator to engage APCs in promoting an interferon-driven anticancer T cell response
Lerapolturev also targets key antigen presenting cells (APCs) within the tumor microenvironment, where it stimulates the robust type-I/III interferon-dominant response required for anticancer T cell activation.

Find out more about lerapolturev's mechanism of action by watching this video.

The LUMINOS Clinical Trial Program

Lerapolturev has been administered to more than 200 patients and is currently the subject of multiple ongoing phase 2 trials across multiple solid tumors.

Tumor Type
Phase 1
Phase 2
Phase 3
Lerapolturev Monotherapy
Lerapolturev + Pembrolizumab
Lerapolturev ± Anti–PD-1
Non-muscle-invasive bladder cancer (NMIBC)
Intravesicular Lerapolturev Monotherapy
Istari clinical trial pipeline
See our clinical trials

Strong Support From FDA

Strong Support
From FDA


Recurrent GBM

Breakthrough Therapy
Orphan Drug Designation


Refractory melanoma

Fast Track
Orphan Drug Designation

Lerapolturev has been designated an Orphan Drug and granted Breakthrough Therapy Designation for recurrent glioblastoma (rGBM) by the FDA.

Lerapolturev has also been designated an Orphan Drug in advanced melanoma (Stages IIb-IV) and granted Fast Track status for patients with advanced melanoma who have disease progression after anti–PD-1/L1 therapy.

Recent News Releases

Recent News Releases

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