Safety and Efficacy Study of Denosumab in Patients With Recurrent or Unresectable Giant Cell Tumor of Bone
|ClinicalTrials.gov Identifier: NCT00396279|
Recruitment Status : Completed
First Posted : November 6, 2006
Results First Posted : March 5, 2014
Last Update Posted : July 18, 2014
|Condition or disease||Intervention/treatment||Phase|
|GCT Giant Cell Tumor of Bone||Biological: Denosumab Dietary Supplement: Calcium/Vitamin D||Phase 2|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||37 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||An Open-Label, Multi-Center, Phase 2 Safety and Efficacy Study of Denosumab (AMG 162) in Subjects With Recurrent or Unresectable Giant Cell Tumor (GCT) of Bone|
|Study Start Date :||July 2006|
|Primary Completion Date :||April 2008|
|Study Completion Date :||February 2011|
Participants received denosumab 120 mg once every 4 weeks (Q4W), with an additional 120 mg doses on Days 8 and 15 of the first month of treatment. All participants were instructed to take daily supplements of at least 500 mg of calcium and 400 IU of vitamin D. Participants were to continue to receive denosumab until one of the following occurred: complete tumor resection, disease progression without clinical benefit, or decision by the participant to discontinue for any reason.
Administered by subcutaneous injection
Other Name: Xgeva®Dietary Supplement: Calcium/Vitamin D
- Percentage of Participants With Giant Cell Tumor Response [ Time Frame: From enrollment until 25 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, or • complete elimination of giant cells in cases where giant cells represent < 5% of tumor cells. A response was defined for participants who have only radiographs (histopathology not available) as lack of progression of the target lesion at week 25 by radiographic measurements compared with Baseline. For participants with both a core biopsy and resected tissue obtained, the sample closest to week 25 was used in the analysis.
- Percent Change From Baseline in Urinary N-telopeptide Corrected for Urine Creatinine [ Time Frame: Baseline and Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, and 81 ]Urinary N-telopeptide (of type 1 collagen) corrected for urine creatinine (uNTX/Cr) is a bone turnover marker used to measure the activity of denosumab. Percent change from Baseline in uNTX/Cr was measured over time.
- Percent Change From Baseline in Serum C-terminus Peptide (of Type 1 Collagen) [ Time Frame: Baseline and Weeks 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, and 81 ]Serum C-terminus peptide (of type 1 collagen; CTX1) is a bone turnover marker used to measure the activity of denosumab. Percent change from Baseline in CTX was measured over time.
- Serum Denosumab Trough Concentrations [ Time Frame: Blood samples were collected on Days 1 (baseline), 8, 15 and Weeks 5 (Day 29), 9, 13, 25, and 49. ]Serum concentrations of denosumab were measured by a validated conventional sandwich enzyme-linked immunosorbent assay (ELISA).
- Number of Participants With Adverse Events (AEs) [ Time Frame: From the first dose of study drug until the data cut-off date of April 7 2008; a maximum of 18 months ]An adverse event is defined as an undesirable medical occurrence (e.g., sign, symptom, or diagnosis) or worsening of a pre-existing medical condition. A serious adverse event (SAE) is defined by regulatory authorities as one that • is fatal • is life threatening (places the participant at immediate risk of death) • requires in-patient hospitalization or prolongation of existing hospitalization • results in persistent or significant disability/incapacity • is a congenital anomaly/birth defect • other significant medical hazard. The severity of adverse events was assessed according to the Common Terminology Criteria for Adverse Events (CTCAE, version 3.0) based on the following general guideline: Grade 1: Mild AE Grade 2: Moderate AE Grade 3: Severe AE Grade 4: Life-threatening or disabling AE Grade 5: Death related to AE. AEs were assessed by the Investigator for relatedness to study drug.
- Number of Participants With Anti-Denosumab Antibodies [ Time Frame: From enrollment until the data cut-off date of April 7 2008; a maximum time of 18 months. ]Validated immunoassays were used to test for the presence of anti-denosumab antibodies throughout the study.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00396279