NCT01723813

Peptide Vaccinations Plus GM-CT-01 in Melanoma

Phase I/II Study of Peptide Vaccination Associated With GM-CT-01, a Galactomannan Oligomer That Inhibits Galectin-3, in Patients With Advanced Metastatic Melanoma

• Status: Terminated
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 6 (actual)
• Sponsor: Cliniques universitaires Saint-Luc- Université Catholique de Louvain · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to determine whether the intravenous and/or GM-CT-01 administration can correct Tumor Infiltrating Lymphocytes (TIL) anergy and induce a more efficient and long-lasting anti-tumoral immune response following peptide vaccination.

Detailed description

Human cancers express tumor antigens that can be targeted by cytolytic T lymphocytes (CTL). These antigens consist of a small peptide, derived from endogenous proteins, that is presented at the cancer cell's surface by an HLA class I molecule. Such antigenic peptides, including MAGE-3.A1 and NA17.A2, have been tested in experimental therapeutic vaccines to elicit CTL responses in cancer patients, mainly with metastatic melanoma. Up to now, only rare tumor responses have been observed. Tumor resistance to CTL killing is the most likely explanation for the poor effectiveness of cancer vaccines. This resistance is probably acquired by the tumor during its development and selected by its repetitive challenge with spontaneous anti-tumoral immune responses. Recently, we have identified a novel mechanism causing anergy of tumor-associated T lymphocytes, and established new approaches to correct this anergy in vitro. Galectin-3, secreted by tumor cells, appears to inhibit CTL function the co-localization of the T cell receptor and the cluster of differentiation 8 coreceptor. Importantly, this functional defect is restored when anergic T cells are incubated with galectin-3 inhibitors such as the disaccharides lactose and N-acetyllactosamine, and the polysaccharide GM-CT-01. GM-CT-01 is a vegetal galactomannan oligomer, currently under clinical investigation in several types of solid malignancies for its capacity to inhibit galectins and to synergize with chemotherapy drugs. Our observations suggest that treatment of cancer patients with GM-CT-01 could correct TIL anergy and induce a more efficient and long-lasting anti-tumoral immune response following peptide vaccination.

Conditions

• Metastatic Melanoma

Interventions

Type	Name	Description
BIOLOGICAL	Tumor specific peptides: MAGE-3.A1 and / or NA17.A2	Each peptide will be given at a dose of 300 µg in 1 ml of sodium chloride 0.9%, every 3 weeks on 6 occasions, and will be administered at one site in arm or thigh, 20% of the dose intradermally and 80% of the dose subcutaneously.
BIOLOGICAL	Galectin-3 inhibitor: GM-CT-01 systemic injections	Systemic injection of GM-CT-01: GM-CT-01 will be administered by slow intravenous infusions at a dose of 280 mg/m2, on days +3, +6, +9, +12, +15, +18 after each of the 3rd, 4th, 5th and 6th vaccination.
BIOLOGICAL	Galectin-3 inhibitor: GM-CT-01 Peri-tumoral administration	GM-CT-01 will be injected peri-tumoral at a dose of 100 µg per tumor injected, on days +3, +6, +9, +12, +15, +18 after each of the 3rd, 4th, 5th and 6th vaccination. If a patient has one or two superficial metastases at day 43 of the treatment, one of these lesions will be treated. If a patient has more than two superficial metastases at day 43, two of these lesions will be treated.

Timeline

• Start date: 2012-04-01
• Primary completion: 2015-04-01
• Completion: 2015-04-01
• First posted: 2012-11-08
• Last updated: 2019-03-12

Locations

1 site across 1 country: Belgium