Study of GSK3901961 In Previously Treated Advanced (Metastatic OR Unresectable) Synovial Sarcoma/ Myxoid/Round Cell Liposarcoma, and Previously Treated Metastatic Non-Small Cell Lung Cancer

Adaptimmune

Status and phase: Terminated; Phase 1

Conditions: Neoplasms

Treatments: Drug: Fludarabine; Drug: Cyclophosphamide; Drug: GSK3901961

Study type: Interventional

Funder types: Industry

Identifiers

NCT06048705

209012 Substudy 1

Details and patient eligibility

About

The primary purpose of this sub study is to assess the safety, tolerability and determine recommended Phase 2 dose (RP2D) of GSK3901961 in HLA A*02:01, HLA-A*02:05 and/or HLA A*02:06 positive participants with New York esophageal squamous cell carcinoma (NY ESO 1) and/or Cancer testis antigen 2 (LAGE 1a) positive previously treated metastatic Non-Small Cell Lung Cancer (NSCLC) and previously treated, advanced (metastatic or unresectable) Synovial Sarcoma/ Myxoid/Round Cell Liposarcoma SS/MRCLS.

Full description

This study is a substudy of the Master record - (209012) NCT04526509.

Enrollment: 7 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Participant must be >=18 years of age and weighs ≥40 kg 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
• Participant's tumor must have tested positive for NY-ESO-1 and/or LAGE-1a expression by a GSK designated laboratory
• Performance status: Eastern Cooperative Oncology Group of 0-1
• Participant must have adequate organ function and blood cell counts 7 days prior to leukapheresis
• Participant must have measurable disease according to RECIST v1.1.
• Participant has advanced (metastatic or unresectable) SS or MRCLS confirmed by local histopathology with evidence of disease-specific translocation
• Participant has completed at least one standard of care (SOC) treatment including anthracycline containing regimen unless intolerant to or ineligible to receive the therapy.
• Participants who are not candidates to receive anthracycline should have received ifosfamide unless also intolerant to or ineligible to receive ifosfamide. Participants who received neoadjuvant/adjuvant anthracycline or ifosfamide based therapy and progressed will be eligible
• Participant has histologically or cytologically confirmed Stage IV NSCLC
• Participant has been previously treated with SOC for Stage IV NSCLC

Exclusion criteria

• Central nervous system (CNS) metastases, with certain exceptions for CNS metastases in NSCLC as specified in the protocol
• 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 requiring steroids or other immunosuppressive treatments
• Previous treatment with genetically engineered NY-ESO-1-specific T cells, NY-ESO-1 vaccine or NY-ESO-1 targeting antibody
• Prior gene therapy using an integrating vector
• Previous allogeneic hematopoietic stem cell transplant within the last 5 years or solid organ transplant
• Washout periods for prior radiotherapy and systemic chemotherapy must be followed
• Major surgery within 4 weeks prior to lymphodepletion
• Pregnant or breastfeeding females

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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7 participants in 1 patient group

GSK3901961

Experimental group

Description:

Eligible participants will be leukapheresed to manufacture engineered T-cells. Participants will then receive high dose of GSK3901961 after completing lymphodepleting chemotherapy. The first study participant receiving GSK3901961 will receive the total assigned dose as 2 separate infusions 7 days apart, in aliquots of 30% (first infusion) and 70% (second infusion) of the total target dose, respectively. Based on the dose limiting toxicities reported in the first participant, then all subsequent participants treated with GSK3901961 will receive the full dose as a single, i.e., one-time, infusion.

Treatment:

Drug: GSK3901961

Drug: Cyclophosphamide

Drug: Fludarabine