Summary

Eligibility
for people ages 18 years and up (full criteria)
Location
at UCLA
Dates
study started
estimated completion

Description

Summary

The purpose of this study is to evaluate the dose, safety, immunogenicity and early clinical activity of GRT-C903 and GRT-R904, a neoantigen-based therapeutic cancer vaccine, in combination with immune checkpoint blockade, in patients with advanced or metastatic non-small cell lung cancer, microsatellite stable colorectal cancer, pancreatic cancer, and shared neoantigen-positive tumors.

Official Title

A Phase 1/2 Study of GRT-C903/GRT-R904, a Vaccine Targeting Shared Neoantigens, in Combination With Immune Checkpoint Blockade for Patients With Advanced Solid Tumors

Details

Tumors harboring non-synonymous deoxyribonucleic acid (DNA) mutations can present peptides containing these mutations as non-self antigens in the context of HLA on the tumor cell surface. A fraction of mutated peptides result in neoantigens capable of generating T-cell responses that exclusively target tumor cells. Some of these tumor-specific neoantigens are known or expected to be common across a subset of patients and are called shared neoantigens. This study aims to target shared neoantigens using a heterologous prime/boost therapeutic vaccine approach (GRT-C903 first followed by GRT-R904) in combination with checkpoint blockade to stimulate an immune response. This study will explore the safety and early clinical activity of this neoantigen-based immunotherapy intended to induce T-cell responses specific for the shared neoantigens contained within the therapeutic vaccine. Phase 1 will test multiple doses and combinations with checkpoint blockade and Phase 2 will test for early signs of clinical activity using a vaccine regimen based on Phase 1 data.

Keywords

Non Small Cell Lung Cancer Colorectal Cancer Pancreatic Cancer Solid Tumor Shared Neoantigen-Positive Solid Tumors neoantigen cancer vaccine shared neoantigen GRT-C903 GRT-R904 immunotherapy PD-1 CTLA-4 nivolumab ipilimumab Neoplasms

Eligibility

You can join if…

Open to people ages 18 years and up

  • Provide a signed and dated informed consent form prior to initiation of study-specific procedures.
  • Patients with the indicated advanced or metastatic solid tumor as follows:
  • Microsatellite-stable colorectal cancer (MSS-CRC) who are currently receiving systemic treatment with a fluoropyrimidine and oxaliplatin and/or irinotecan that may include a VEGF or EGFR targeting therapy as their 1L or 2L therapy for metastatic disease OR who have experienced disease progression following treatment with a fluoropyrimidine, oxaliplatin, and irinotecan that may include a VEGF or EGFR targeting therapy, but have not initiated a new line of therapy
  • Non-small cell lung cancer (NSCLC) who are currently receiving systemic treatment with an anti-PD-(L)1 antibody in combination with cytotoxic, platinum-based chemotherapy OR who have experienced disease progression following treatment with an anti-PD-(L)1 antibody in combination with cytotoxic, platinum-based chemotherapy (or anti-PD-(L)1 alone if patient refuses platinum-based chemotherapy), but have not initiated a new line of therapy
  • Pancreatic ductal adenocarcinoma (PDA) who are currently receiving systemic cytotoxic chemotherapy as their 1L therapy for metastatic disease OR who have experienced disease progression on 1L systemic cytotoxic chemotherapy, but have not initiated a new line of therapy
  • Any solid tumor histology where the patient has experienced disease progression with all available therapies known to confer clinical benefit
  • Patient's tumor possesses one of the mutations listed in protocol, and is determined to express a HLA allele for antigen presentation of the identified tumor mutation
  • ECOG Performance Status 0 or 1
  • Measurable disease according to RECIST v1.1
  • Adequate organ function, as measured by laboratory values (criteria listed in protocol)

You CAN'T join if...

  • Tumors with genetic characteristics as follows:
  • For NSCLC, patients with a known genetic driver alteration in EGFR, ALK, ROS1, RET, or TRK
  • Patients with known MSI-high disease based on institutional standard
  • Known exposure to chimpanzee adenovirus or any history of anaphylaxis in reaction to a vaccination
  • Bleeding disorder (eg., factor deficiency, coagulopathy) or history of significant bruising or bleeding following IM injections or blood draws
  • Patient has received prior therapy consisting of anti-CTLA-4, anti-PD-1, anti-PD-L1, or any other antibody or drug specifically targeting T-cell co-stimulation or checkpoint pathways, with the exception of patients with NSCLC or a mutation-positive solid tumor
  • History of allogenic/solid organ transplant
  • Active, known, or suspected autoimmune disease
  • Active tuberculosis or recent (<2 week) clinically significant infection, or evidence of active hepatitis B or hepatitis C
  • Known history of positive test for human immunodeficiency (HIV) or known acquired immunodeficiency syndrome (AIDS)

Complete inclusion and exclusion criteria are listed in the clinical study protocol.

Locations

  • UCLA Medical Center accepting new patients
    Santa Monica California 90404 United States
  • City of Hope Comprehensive Cancer Center accepting new patients
    Duarte California 91010 United States

Details

Status
accepting new patients
Start Date
Completion Date
(estimated)
Sponsor
Gritstone Oncology, Inc.
ID
NCT03953235
Phase
Phase 1/2
Study Type
Interventional
Last Updated