Pilot Study of Neoantigen Peptides for the Treatment of Neoplasms

NCT ID: NCT04509167

Last Updated: 2024-03-06

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: EARLY_PHASE1
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-08-10
• Study Completion Date: 2022-06-24

Brief Summary

This research is a pilot clinical trial using personalized neoantigen peptide vaccines with an adjuvant (Montanide ISA-51 VG), in patients with different types of cancer

Detailed Description

Rationale: Cancer cells express unique peptide antigens recognized by CD8+ cytotoxic T lymphocytes (CTL), which are typically 8-10 amino acids long and are presented in association with Class I MHC molecules. The peptides recognized by helper (CD4+) T-cells are presented in association with Class II MHC molecules and are usually longer (13-18 amino acids in length), although peptide elution studies have indicated no apparent restriction on peptide length. Selected peptides can induce circulating T cell responses in most patients, and that vaccination with a mixture of peptides is immunogenic in up to 100% of patients. The magnitude of T cell responses sometimes is substantial, with 1-5% of circulating CD8 T cells reactive to single antigens. T cell responses to vaccines may be durable for months or years, but are at least as likely to be transient, sometimes declining even while still receiving vaccines. However, T cells induced by vaccination can recognize and lyse cancerous cells expressing the relevant protein and MHC, and peptide vaccines induce promising immunogenicity.

Though MHC-restriction of individual peptides limits their use to a subset of patients, there are mixtures of a dozen peptides restricted by HLA-A1, A2, A3, or A11 can be prepared as a stable mixture and can induce immune responses in 85% of patients with cancer who express one or more of those MHC molecules, without negative effects from competition among the peptides. Other experience supports the ability to induce T cell responses to multiple peptides when vaccinating with peptide mixtures. Since antigenic peptides are easily degraded by proteases in the body, it is difficult for the receptors expressed on the immune cells to identify antigen epitopes, and they do not generate a strong immune response to pathogens. An epitope-based vaccine with a reasonable design is composed of epitope peptide/s, a delivery system, and an adjuvant. For multi-epitope vaccines, since the traditional carriers and adjuvants are associated with poor efficacy, vaccine designs with built-in adjuvants have been proposed. Therefore, a built-in adjuvant exhibiting both the functions of a transmission system and a traditional adjuvant, is constructed within the vaccine to improve the immunogenicity of epitope peptides by stimulating the innate immune response required for an adaptive immune response. To achieve this goal, the epitopes are regularly fused with adjuvant proteins or displayed on the surface of some particular biomaterials (e.g., liposomes, gold nanoparticles, and poly(lactic-co-glycolic acid) (PLGA)) and the immunogenicity of the epitopes are significantly increased by this immune complex.

Study design: This research is a pilot clinical trial using a personalized neoantigen peptide vaccine. Approximately 100 patients with cancer and whose sequencing studies show the presence of neoantigens will receive the personalized multi-peptide vaccine. Peptide vaccines will be given with an adjuvant (Montanide ISA-51 VG) by intradermal injection (~0.5 mg of each peptide) in the arm every week for a maximum of 8 weeks; the treatment will be discontinued if disease progresses or if there is deterioration of the patient's general condition. All patients will give written informed consent; their data will be coded and fully anonymized. The study was approved by the Ethics Committee of the Regenerative Medicine Institute and conformed to the ethical guidelines of the Declaration of Helsinki.

Conditions

Neoplasms

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Treatment

Patients will receive intradermal injection of individualized neoantigen peptides vaccine at a dose of \~500ug per peptide once a week for 8 weeks.

Group Type: EXPERIMENTAL

Neoantigen Peptides

Intervention Type: BIOLOGICAL

Patients will receive intradermal injection of individualized neoantigen peptides vaccine at a dose of \~500ug per peptide once a week for 8 weeks.

Interventions

Neoantigen Peptides

Patients will receive intradermal injection of individualized neoantigen peptides vaccine at a dose of \~500ug per peptide once a week for 8 weeks.

Intervention Type: BIOLOGICAL

Eligibility Criteria

Inclusion Criteria

• 16 years of age or older, male or female
• Life expectancy of at least 3 months
• Confirmed tumor by imaging studies
• Have adequate organ function, as measured by laboratory values: Lymphocyte ratio >20%; WBC >3.0×10^9/L; alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤2.5 × ULN; if the patient has liver metastases, ALT and AST ≤5 × ULN; Alkaline phosphatase (ALP）≤2.5 × ULN; total serum bilirubin (TBIL) < 1.5 × ULN; Urea nitrogen (BUN）≤1.5 × ULN; Creatinine (Cr）1.5≤ULN; Normal blood coagulation function, urine routine, and electrocardiogram (ECG)
• Available tumor specimen for sequencing and neoantigen determination
• Ability to find 3 or more neoantigen epitopes
• Ability to follow research and follow-up procedures
• Able to understand and willing to sign an IRB approved written informed consent document
• Agree with the use of contraception or partner of child-bearing potential agrees to use adequate contraception which will include two of the following: hormonal or barrier method of birth control, or abstinence prior to study entry, for the duration of study participation, and for 30 days following completion of therapy

Exclusion Criteria

• History of immunodeficiency disorder or autoimmune condition requiring active immunosuppressive therapy
• Evidence of Liver and kidney dysfunction, severe heart disease, or coagulation dysfunction
• Known diagnosis of an infectious condition including hepatitis, HIV, CMV, and Treponema pallidum
• Participant becomes pregnant and/or is breastfeeding or plans on becoming pregnant during study
• A psychiatric illness that would limit compliance with study requirements as determined by the investigator or the investigator believes that participant is not suitable for inclusion

• Minimum Eligible Age: 16 Years
• Maximum Eligible Age: 70 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Instituto de Medicina Regenerativa

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Jesus Perez, MD

Role: PRINCIPAL_INVESTIGATOR

Instituto de Medicina Regenerativa

Locations

Instituto de Medicina Regenerativa

Tijuana, Estado de Baja California, Mexico

Countries

Mexico

Other Identifiers

PEP-NEO-001

Identifier Type: -

Identifier Source: org_study_id