New emerging targets in cancer immunotherapy: the role of VISTA

Marco Tagliamento1, Paolo Bironzo2, Silvia Novello2

  • 1Department of Medical Oncology, Medical Oncology 2, University of Genova & IRCCS Ospedale Policlinico San Martino, Genova, Italy.

ESMO Open
|June 20, 2020
PubMed

Insights

New immunotherapy targets like V-domain Ig Suppressor of T-cell Activation (VISTA) show promise. CA-170, a VISTA and PD-L1 inhibitor, demonstrated clinical efficacy in advanced solid tumors, suggesting a potential new treatment option.

Area of Science:

  • Immunology
  • Oncology
  • Pharmacology

Background:

  • Immune checkpoint inhibitors (ICIs) are crucial in cancer therapy, but their efficacy is limited by biomarkers like PD-L1.
  • Novel therapeutic targets and biomarkers are essential to enhance immunotherapy outcomes.
  • V-domain Ig Suppressor of T-cell Activation (VISTA) is a key regulator of T-cell responses with emerging antitumour potential.

Purpose of the Study:

  • To explore VISTA as a therapeutic target for cancer immunotherapy.
  • To evaluate the clinical efficacy and potential of VISTA antagonists, specifically CA-170.

Main Methods:

  • Preclinical studies investigating VISTA blockade for antitumour activity.
  • Phase I and II clinical trials of CA-170, an oral dual VISTA and PD-L1 inhibitor, in patients with advanced solid tumors.

Main Results:

  • VISTA blockade demonstrated in vitro and in vivo antitumour activity.
  • CA-170 exhibited clinical efficacy across various advanced solid tumor types in early-phase trials.
  • The drug is an orally delivered dual inhibitor targeting both VISTA and PD-L1.

Conclusions:

  • VISTA represents a promising target for novel cancer immunotherapies.
  • CA-170 shows potential as a new therapeutic option for patients with VISTA-expressing cancers.
  • Further clinical data are required to establish VISTA antagonists as a standard treatment modality.

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