Efficacy and Safety of JMT103 in Patients With Giant Cell Tumor of Bone

Phase 1

Active, not recruiting

• Conditions: Giant Cell Tumor of Bone

• Registration Number: NCT04255576
• Lead Sponsor: Shanghai JMT-Bio Inc.

Brief Summary

This is a phase Ib/II, multicenter, single-arm, open-label study to evaluate the efficacy and safety of JMT103 in patients with surgically unsalvageable or refractory giant cell tumor of bone (GCTB).

Detailed Description

The objective of the trial is to evaluate the efficacy and safety of JMT103 in patients with GCTB that is surgically unsalvageable or for which the planned surgery is associated with severe morbidity.

This study consists of two parts (phase Ib and II). In the phase Ib part, 6 to 12 subjects will be enrolled, and the safety, pharmacokinetics and pharmacodynamics of JMT103 will be evaluated after treatment for more than 4 weeks. And then the phase II part will be conducted, in which, 125 subjects will be enrolled.

Eligible subjects will receive JMT103 at a dose of 2mg/kg subcutaneously (SC) every 4 weeks (Q4W) with a loading dose of 2mg/kg SC on study days 8 and 15 until disease progression, tumor resection (the pathologic outcome after surgical resection is CR or PR), intolerable toxicity, decision by the participant to discontinue, or decision by the investigator that the subject could no longer benefit from the treatment (whichever occurs first).

Study Timeline

• Study Start: 2019-10-10
• Study First Submitted: 2020-01-13
• Study First Submitted QC: 2020-02-03
• Study First Posted: 2020-02-05
• Status Verified: 2022-10
• Last Update Submitted: 2022-10-13
• Last Update Posted: 2022-10-14
• Primary Completion: 2023-09
• Study Completion: 2023-10

Recruitment & Eligibility

• Status: ACTIVE_NOT_RECRUITING
• Sex: All
• Target Recruitment: 139

Inclusion Criteria

1. Fully informed and signed informed consent.
2. Male or female, Adults, 18 years and older
3. Histologically confirmed GCTB that is surgically unsalvageable or for which the planned surgery is associated with severe morbidity.
4. Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1 or 2.

Exclusion Criteria

1. Fertile subjects refuse to use effective contraception methods from the signing of the informed consent to 6 months after the last dose;
2. Active dental or jaw condition which requires oral surgery, including tooth extraction;
3. Currently receiving other anti-tumor therapy (radiotherapy, chemotherapy or arterial embolization, etc.);
4. Concurrent treatment with bisphosphonates;
5. Known history of second malignancy within the past 5 years, except for basal cell carcinoma or cervical carcinoma in situ.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Percentage of Participants with Giant Cell Tumor Response	From enrollment until 12 weeks	A treatment response was defined for participants with tissue samples obtained and measured by histopathology as: at least 90% elimination of giant cells relative to Baseline. A response was defined for participants who have only radiographs (histopathology not available) as lack of progression of the target lesion (PR or CR) at week 12 by radiographic measurements compared with Baseline.

Secondary Outcome Measures

Name	Time	Method
Percentage of Patients with Surgical Resection of Tumor	From enrollment until the last dose, no more than 24 months
Time to Progress (TTP)	From enrollment until the last dose, no more than 24 months
Proportion of Participants with Adverse Events (AEs)	From enrollment until 90 days after the last dose
Number of Participants with Anti-JMT103 Antibodies	From enrollment until 90 days after the last dose
Objective Response Rate (ORR)	From enrollment until the last dose, no more than 24 months
Serum JMT103 Trough Concentrations	From enrollment until 90 days after the last dose
Percent Change from Baseline in Serum C-terminus Peptide (of Type 1 Collagen) and Urinary N-telopeptide Corrected for Urine Creatinine	From enrollment until the last dose, no more than 24 months
Changes in Brief Pain Inventory Short Form (BPI-SF)	From enrollment until the last dose, no more than 24 months	Assess pain and its effects on patients' mood, sleep, ability to move, appetite, daily life, ability to walk, and social interaction
Disease Control Rate (DCR)	From enrollment until the last dose, no more than 24 months

Trial Locations

Locations (1)

Beijing Ji Shui Tan Hospital; 🇨🇳 Beijing, China