Master Protocol to Assess the Safety and Antitumor Activity of Genetically Engineered T Cells in NY-ESO-1 and/or LAGE-1a Positive Solid Tumors (IGNYTE-ESO)
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ClinicalTrials.gov Identifier: NCT03967223 |
Recruitment Status :
Active, not recruiting
First Posted : May 30, 2019
Last Update Posted : October 31, 2022
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Condition or disease | Intervention/treatment | Phase |
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Neoplasms | Drug: Letetresgene autoleucel (lete-cel, GSK3377794) Drug: Fludarabine Drug: Cyclophosphamide | Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 103 participants |
Allocation: | Non-Randomized |
Intervention Model: | Parallel Assignment |
Masking: | None (Open Label) |
Masking Description: | This will be an open-label study. Hence, there will be no masking. |
Primary Purpose: | Treatment |
Official Title: | Master Protocol to Assess the Safety and Antitumor Activity of Genetically Engineered NY-ESO-1-Specific (c259) T Cells, Alone or in Combination With Other Agents, in HLA-A2+ Participants With NY-ESO-1 and/or LAGE-1a Positive Solid Tumors (IGNYTE-ESO) |
Actual Study Start Date : | December 31, 2019 |
Estimated Primary Completion Date : | November 30, 2022 |
Estimated Study Completion Date : | July 31, 2026 |

Arm | Intervention/treatment |
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Experimental: Substudy 1: lete-cel in previously untreated advanced (metastatic or unresectable) SS or MRCLS
Eligible participants will be leukapheresed to manufacture engineered T cells. Participants will then receive letetresgene autoleucel.
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Drug: Letetresgene autoleucel (lete-cel, GSK3377794)
letetresgene autoleucel will be administered. Drug: Fludarabine Fludarabine will be used as the lymphodepleting chemotherapy Drug: Cyclophosphamide Cyclophosphamide will be used as the lymphodepleting chemotherapy. |
Experimental: Substudy 2: lete-cel in advanced (metastatic or unresectable) SS or MRCLS post anthracycline chemo
Eligible participants will be leukapheresed to manufacture engineered T cells. Participants will then receive letetresgene autoleucel.
|
Drug: Letetresgene autoleucel (lete-cel, GSK3377794)
letetresgene autoleucel will be administered. Drug: Fludarabine Fludarabine will be used as the lymphodepleting chemotherapy Drug: Cyclophosphamide Cyclophosphamide will be used as the lymphodepleting chemotherapy. |
- Substudy 1: Overall response rate (ORR) [ Time Frame: Until disease progression (up to 5 years) ]Overall response rate is defined as the percentage of participants with a confirmed complete response (CR) or partial response (PR) relative to the total number of participants within the analysis population at any time per Response Evaluation Criteria in Solid Tumors (RECIST) version (v) 1.1. as determined by the local investigators.
- Substudy 2: Overall response rate (ORR) as assessed by central independent review [ Time Frame: Up to 5 years ]Overall response rate is defined as the percentage of participants with a confirmed CR or PR relative to the total number of participants within the analysis population at any time per RECIST v1.1. as assessed by central independent review.
- Substudy 1 and 2: Time to response (TTR) [ Time Frame: Until disease progression (up to 5 years) ]Time to response is defined as time from date of T-cell administration to first documented evidence of confirmed (CR or PR) as assessed by local investigators per RECIST v1.1.
- Substudy 1 and 2: Duration of response (DOR) [ Time Frame: Until disease progression (up to 5 years) ]Duration of response is defined as, in the subset of participants who show a confirmed CR or PR as assessed by local investigators, the time from first documented evidence of CR or PR until the first documented sign of disease progression or death.
- Substudy 1 and 2: Disease control rate (DCR) [ Time Frame: Until disease progression (up to 5 years) ]Disease control rate is defined as the percentage of participants with a confirmed CR, PR, or stable disease (SD) with minimal 12 weeks duration relative to the total number of participants within the analysis population at the time of primary analysis as determined by Investigators per RECIST v1.1.
- Substudy 1 and 2: Progression free survival (PFS) [ Time Frame: Until disease progression (up to 5 years) ]Progression free survival is defined as the time from the date of T-cell administration until first documented sign of disease progression per RECIST v1.1, or death.
- Substudy 1 and 2: Frequency of adverse events (AEs), serious adverse events (SAEs) and AEs of special interest (AESI) according to severity [ Time Frame: Until disease progression (up to 5 years) ]AEs, SAEs and AESIs will be collected. Severity of AEs and SAEs will be summarized using National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE), version 5.0.
- Substudy 1 and 2: Number of participants with replication competent lentivirus (RCL) [ Time Frame: Until disease progression (up to 5 years) ]RCL exposure will be assessed by polymerase chain reaction (PCR) based assay.
- Substudy 1 and 2: Number of participants with insertional oncogenesis (IO) [ Time Frame: Until disease progression (up to 5 years) ]Peripheral blood mononuclear cells (PBMC) samples will be collected for monitoring insertional oncogenesis by PCR for gene modified cells in the blood.
- Substudy 2: Number of participants with clinically significant changes in hematology, clinical chemistry and urinalysis parameters [ Time Frame: Until disease progression (up to 5 years) ]Blood and urine samples will be collected for assessment of hematology, clinical chemistry and urinalysis parameters.
- Substudy 1 and 2: Maximum transgene expansion (Cmax) of letetresgene autoleucel [ Time Frame: Until disease progression (up to 5 years) ]Whole blood samples will be collected at indicated time points for evaluation of Cmax.
- Substudy 1 and 2: Time to Cmax (Tmax) of letetresgene autoleucel [ Time Frame: Until disease progression (up to 5 years) ]Whole blood samples will be collected at indicated time points for evaluation of Tmax.
- Substudy 1 and 2: Area under the concentration/persistence time curve from zero to time t (AUC[0-t]) of letetresgene autoleucel [ Time Frame: Until disease progression (up to 5 years) ]Whole blood samples will be collected at indicated time points for evaluation of AUC(0-t).
- Substudy 2: Overall response rate (ORR) as determined by the local investigators [ Time Frame: Up to 5 years ]Overall response rate is defined as the percentage of participants with a confirmed CR or PR relative to the total number of participants within the analysis population at any time per RECIST v1.1. as determined by the local investigators.
- Substudy 2: Overall Survival (OS) [ Time Frame: Up to 5 years ]Overall Survival is defined as the interval of time between the date of T-cell infusion and the date of death.
- Substudy 2: Number of participants with positive anti-drug antibodies (ADA) and titers of ADA against letetresgene autoleucel [ Time Frame: Up to 36 months ]Serum samples will be collected to analyze for the presence of ADAs using validated immunoassays.

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Ages Eligible for Study: | 10 Years and older (Child, Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Participant must be greater than or equal to 10 years of age on the day of signing informed consent.
- Participant must be positive for HLA-A*02:01, HLA-A*02:05, and/or HLA-A*02:06 alleles by a designated central laboratory
- Participant's tumor is positive for NY-ESO-1 expression by a designated central laboratory.
- Participant has a diagnosis of synovial sarcoma (SS) or myxoid/round cell liposarcoma (MRCLS)
- Performance status: dependent on age - Lansky > 60, Karnofsky > 60, Eastern Cooperative Oncology Group 0-1.
- Participant must have adequate organ function and blood cell counts, within 7 days prior to leukapheresis.
- At time of treatment, participant has measurable disease according to RECIST v1.1.
- Consultation for prior history per protocol specifications.
Exclusion Criteria:
- Central nervous system metastases.
- Any other prior malignancy that is not in complete remission.
- Clinically significant systemic illness.
- Prior or active demyelinating disease.
- History of chronic or recurrent (within the last year prior to leukapheresis) severe autoimmune or immune mediated disease (e.g. Crohn's disease, systemic lupus) requiring steroids or other immunosuppressive treatments.
- Previous treatment with genetically engineered NY-ESO-1-specific T cells.
- Previous NY-ESO-1 vaccine or NY-ESO-1 targeting antibody.
- Prior gene therapy using an integrating vector.
- Previous allogeneic hematopoietic stem cell transplant.
- Washout periods for prior radiotherapy and systemic chemotherapy must be followed.
- Participant had major surgery in less than or equal to 28 days of first dose of study intervention.
- Prior radiation exceeds protocol specified limits.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03967223
United States, California | |
GSK Investigational Site | |
Duarte, California, United States, 91010 | |
GSK Investigational Site | |
Stanford, California, United States, 94305 | |
United States, Colorado | |
GSK Investigational Site | |
Denver, Colorado, United States, 80218 | |
United States, Florida | |
GSK Investigational Site | |
Jacksonville, Florida, United States, 32224 | |
United States, Illinois | |
GSK Investigational Site | |
Chicago, Illinois, United States, 60637 | |
United States, Iowa | |
GSK Investigational Site | |
Iowa City, Iowa, United States, 52242-1009 | |
United States, Massachusetts | |
GSK Investigational Site | |
Boston, Massachusetts, United States, 02114 | |
United States, Michigan | |
GSK Investigational Site | |
Ann Arbor, Michigan, United States, 48109 | |
United States, Minnesota | |
GSK Investigational Site | |
Minneapolis, Minnesota, United States, 55455 | |
GSK Investigational Site | |
Rochester, Minnesota, United States, 55905 | |
United States, Missouri | |
GSK Investigational Site | |
Saint Louis, Missouri, United States, 63110 | |
United States, New York | |
GSK Investigational Site | |
New York, New York, United States, 10065 | |
United States, North Carolina | |
GSK Investigational Site | |
Durham, North Carolina, United States, 27710 | |
United States, Ohio | |
GSK Investigational Site | |
Columbus, Ohio, United States, 43210 | |
United States, Oregon | |
GSK Investigational Site | |
Portland, Oregon, United States, 97239 | |
United States, Pennsylvania | |
GSK Investigational Site | |
Pittsburgh, Pennsylvania, United States, 15232 | |
United States, Tennessee | |
GSK Investigational Site | |
Nashville, Tennessee, United States, 37203 | |
United States, Texas | |
GSK Investigational Site | |
Dallas, Texas, United States, 75390-8565 | |
GSK Investigational Site | |
Dallas, Texas, United States, 75390-9063 | |
United States, Utah | |
GSK Investigational Site | |
Salt Lake City, Utah, United States, 84112 | |
United States, Virginia | |
GSK Investigational Site | |
Richmond, Virginia, United States, 23298 | |
United States, Washington | |
GSK Investigational Site | |
Seattle, Washington, United States, 98109-1024 | |
United States, Wisconsin | |
GSK Investigational Site | |
Milwaukee, Wisconsin, United States, 53226 | |
Canada, Ontario | |
GSK Investigational Site | |
Toronto, Ontario, Canada, M5G 2M9 | |
Canada, Quebec | |
GSK Investigational Site | |
Montreal, Quebec, Canada, H1T 2M4 | |
France | |
GSK Investigational Site | |
Lyon cedex 08, France, 69373 | |
GSK Investigational Site | |
Pessac cedex, France, 33604 | |
Italy | |
GSK Investigational Site | |
Milano, Lombardia, Italy, 20133 | |
GSK Investigational Site | |
Rozzano (MI), Lombardia, Italy, 20089 | |
Netherlands | |
GSK Investigational Site | |
Amsterdam, Netherlands, 1066 CX | |
Spain | |
GSK Investigational Site | |
Barcelona, Spain, 08025 | |
GSK Investigational Site | |
Hospitalet de Llobregat, Barcelona, Spain, 08907 | |
GSK Investigational Site | |
Madrid, Spain, 28040 | |
GSK Investigational Site | |
Sevilla, Spain, 41013 | |
United Kingdom | |
GSK Investigational Site | |
London, United Kingdom, SW3 6JJ | |
GSK Investigational Site | |
London, United Kingdom, WC1E 6AG | |
GSK Investigational Site | |
Manchester, United Kingdom, M20 4BX |
Study Director: | GSK Clinical Trials | GlaxoSmithKline |
Responsible Party: | GlaxoSmithKline |
ClinicalTrials.gov Identifier: | NCT03967223 |
Other Study ID Numbers: |
208467 |
First Posted: | May 30, 2019 Key Record Dates |
Last Update Posted: | October 31, 2022 |
Last Verified: | October 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | IPD for this study will be made available via the Clinical Study Data Request site. |
Supporting Materials: |
Study Protocol Statistical Analysis Plan (SAP) Informed Consent Form (ICF) Clinical Study Report (CSR) |
Time Frame: | IPD will be made available within 6 months of publishing the results of the primary endpoints, key secondary endpoints and safety data of the study. |
Access Criteria: | Access is provided after a research proposal is submitted and has received approval from the Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months but an extension can be granted, when justified, for up to another 12 months. |
URL: | http://clinicalstudydatarequest.com |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Adoptive T-cell therapy Advanced metastatic disease Advanced unresectable disease Synovial sarcoma Myxoid/round cell liposarcoma GSK3377794 |
Positive solid tumors T-cell receptors Leukapheresis Letetresgene autoleucel Lete-cel |
Cyclophosphamide Fludarabine Immunosuppressive Agents Immunologic Factors Physiological Effects of Drugs Antirheumatic Agents |
Antineoplastic Agents, Alkylating Alkylating Agents Molecular Mechanisms of Pharmacological Action Antineoplastic Agents Myeloablative Agonists |