Study of Emactuzumab for Tenosynovial Giant Cell Tumor (TGCT) (NCT05417789) | Clinical Trial Compass
Active — Not RecruitingPhase 3
Study of Emactuzumab for Tenosynovial Giant Cell Tumor (TGCT)
United States128 participantsStarted 2024-10-09
Plain-language summary
This is a multicenter, Phase 3, randomised, double-blind, placebo-controlled study, which aims to evaluate the efficacy and safety of the investigational drug emactuzumab for the treatment of patients with localized or diffuse TGCT where surgical removal of the tumor is not viewed as an option.
The study consists of two parts. In Part 1, eligible subjects will be assigned in a 2:1 ratio to receive either emactuzumab or matching placebo in a double-blind fashion, that will be administered in total 5 times as an intravenous (i.v.) infusion once every 2 weeks. This will be followed by an observation period of 3 months leading to a total duration of 24 weeks in Part 1. A number of assessments will be carried out during the course of the study, including physical examinations, blood tests, imaging studies, electrocardiograms, and questionnaires. Part 2 is a long-term double-blind follow-up phase of the subjects on emactuzumab or placebo. Subjects assigned to placebo in Part 1 have the option, subject to eligibility, to crossover to receive open-label emactuzumab in Part 2. Subjects assigned to active drug in Part 1 have the option to receive open-label retreatment under certain circumstances.
Who can participate
Age range12 Years
SexALL
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Inclusion Criteria:
* Age \>12 years
* Biopsy-confirmed (standard of care diagnosis history) local or diffuse TGCT where surgical resection would be associated with predicted worsening functional limitations through surgical joint damage, and/or subject has an anticipated high risk of early recurrence as determined by a multidisciplinary tumour board or equivalent, or any other morbidity associated with the surgery, and/or surgical treatment is not expected to improve the clinical outcomes of the subject.
* Measurable disease: longest diameter ≥20 mm.
* Adequate organ and bone marrow function
* If a woman of childbearing potential (WOCBP), must have a negative pregnancy test prior to starting treatment and agree to use a highly effective method of contraception
* Participants must have given written consent
Exclusion Criteria:
* If a female, the subject is pregnant or breast feeding.
* Medical conditions, including auto-immune, requiring systemic immunosuppression. Any systemic treatment for these conditions (eg, glucocorticoids) is not allowed within 4 weeks of Screening and during the study.
* Known metastatic TGCT or other active cancer that requires concurrent or planned treatment
* Received systemic therapy for TGCT (investigational or approved) targeting CSF-1 or CSF-1R or any multi-tyrosine kinase inhibitor (eg nilotinib and imatinib) within 3 months prior to screening
* Any surgery, chemotherapy or radiotherapy within 3 months of screening
* Unresolved clinically s…