Press Release

May 25, 2023

Vigeo Therapeutics New Immune Profiling and Biomarker Data Ph I/II Expansion study in GBM Patients

Cambridge MA – May 25, 2023 (PR Newswire) –Vigeo Therapeutics, a clinical-stage immuno-oncology company pioneering novel cancer therapies, today announced encouraging new data from its phase I/II expansion study evaluating single-agent activity of VT1021 in patients with recurrent glioblastoma (rGBM). The data will be presented in a poster session on June 3, 2023 from 1:15PM – 4:15PM at the American Society of Clinical Oncology (ASCO) annual meeting being held June 2 – June 6, 2023 in Chicago, IL.

VT1021 is a first-in-class compound that, by binding to MDSCs, induces the expression of thrombospondin-1 (Tsp-1) in the tumor microenvironment (TME). Tsp-1 blocks the CD47 immune checkpoint and engages CD36 to induce tumor cell apoptosis, inhibit angiogenesis, activate cytotoxic T cells (CTL), and reprogram macrophages from the M2 to M1 phenotype.

In a phase I/II clinical study in solid tumors (NCT03364400), VT1021 demonstrated promising single-agent clinical activity against recurrent glioblastoma. Among 22 evaluable subjects with rGBM, 3 had a complete response (CR), 1 had a partial response (PR), and 6 had stable disease (SD) with an average study duration of over 120 days. One subject continues to receive VT1021 treatment and has been on study for almost 3 years with no remaining measurable lesion. Historically, rGBM patients have a response rate of less than 5% and a median progression free survival of 48 days.

Confirming the Mechanism of Action (MOA) of VT1021, extensive analysis of tumor immune profiles revealed beneficial and sustained changes in CTL parameters and PD-L1+ MDSCs that correlated with response. Specifically, CR/PR subjects showed decreases in PDL1+ MDSCs along with increases in total CTLs, proliferating CTLs, and CTL/Treg ratio. In contrast, SD and PD subjects exhibited no change or decrease in these three CTL parameters.

“Demonstrating that the expected MOA of VT1021 in reprogramming the TME may be associated with better clinical outcomes in rGBM subjects confirms the efforts of our clinical development program,” said Vigeo COO and co-founder, Dr. Jing Watnick. Vigeo is already studying the therapeutic effect of VT1021 in both newly diagnosed and recurrent GBM in an ongoing phase II/III clinical study (NCT03970447).

Title: Immune profiling in patients with glioblastoma treated with VT1021 in a phase I/II expansion study
Date & Time: Saturday June 3, 2023 from 1:15PM – 4:15 PM
Abstract Session: Central Nervous System Tumors
Abstract: 409504
Location: Board # 378

Presenter: Jian Chen, Ph.D. Senior Director of Research at Vigeo Therapeutics

About VT1021
Vigeo’s lead asset, VT1021, is a first-in-class dual-modulating compound that blocks the CD47 immune checkpoint and activates CD36, which induces apoptosis in tumors and endothelial cells, and increases the M1:M2 macrophage ratio. VT1021 achieves these biological effects via stimulation of thrombospondin-1 (Tsp-1). The result of these dual-modulating effects is conversion of immuno-suppressive, or “cold,” tumors that are associated with poor response to immuno-oncology agents, to immuno-stimulated, or “hot,” tumors that are more susceptible to attack from the body’s immune system. Vigeo is developing VT1021 as a therapeutic agent across a range of cancers, with a current focus on solid tumors.

About Vigeo Therapeutics
Based in Cambridge, MA, Vigeo Therapeutics is a clinical-stage immuno-oncology company pioneering novel cancer therapies. The company is building a first-in-class drug development pipeline led by VT1021, its dual-modulating compound that blocks the CD47 immune checkpoint and reprograms CD36 mediated activities.  VT1021 has been investigated as a single agent in a phase I/II clinical trial in patients with glioblastoma, pancreatic cancer, and other solid tumors, and is currently undertaking late-stage clinical studies. For more information visit

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