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Basket Trial in Solid Tumors Harboring a Fusion of FGFR1, FGFR2 or FGFR3- (FUZE Clinical Trial)

A Phase II Basket Study of the Oral Selective Pan-FGFR Inhibitor Debio 1347 in Subjects With Solid Tumors Harboring a Fusion of FGFR1, FGFR2 or FGFR3

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03834220
Enrollment
63
Registered
2019-02-07
Start date
2019-03-22
Completion date
2022-01-04
Last updated
2024-02-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid Tumor

Brief summary

The primary objective of this study is to assess the efficacy of Debio 1347 in terms of objective response rate (ORR) in participants with solid tumors harboring fibroblast growth factor receptor (FGFR)1-3 gene fusion/rearrangement.

Interventions

Debio 1347 oral tablets.

Sponsors

Caris Life Sciences
CollaboratorINDUSTRY
Optimal Research (Just In Time sites)
CollaboratorUNKNOWN
Debiopharm International SA
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Cytologically or histologically confirmed advanced solid tumor * Radiographic progression on prior systemic therapy; prior localized therapy (i.e., radiation, ablation, embolization) is allowed provided radiographic progression out-of-field or in the treatment, field is shown * Locally-advanced (unresectable) or metastatic disease harboring an FGFR1-3 gene fusion/rearrangement potentially leading to a functional FGFR aberrant protein, identified through local and/or central molecular assay

Exclusion criteria

* History of hypersensitivity to any of the excipients in the Debio 1347 formulation * History and/or current evidence of ectopic mineralization/calcification, including but not limited to soft tissue, kidneys, intestine, myocardia, or lung, excepting calcified lymph nodes, lung nodules and asymptomatic vascular or cartilage/tendon calcifications * Administration of any investigational agent within 2 weeks prior to initial dosing with Debio 1347 (3 weeks for immune checkpoint inhibitors)

Design outcomes

Primary

MeasureTime frameDescription
Objective Response Rate (ORR) as Centrally Measured by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) CriteriaUp to disease progression or end of study (up to 1 year and 9 months)ORR was defined as the percentage of participants with a best overall response (BOR) of partial or complete response (PR or CR). BOR was defined as the best confirmed response observed from first administration of study drug until disease progression. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Secondary

MeasureTime frameDescription
Disease Control Rate (DCR) as Centrally Measured by Independent Review Committee (IRC)Up to disease progression or end of study (up to 2 years and 9 months)DCR was defined as the percentage of participants with a BOR of confirmed CR, confirmed PR or stable disease (SD) ≥6 weeks. BOR was defined as the best confirmed response observed from first administration of study drug until disease progression. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study. PD was defined as ≥ 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study.
Progression-Free Survival (PFS) as Centrally Measured by Independent Review Committee (IRC)From the start of the study up to disease progression or death (up to 2 years and 9 months)PFS was defined as the time from the start date of treatment to date of the first documented progression or death due to any cause.
Overall Survival (OS)Until death or loss to follow-up or end of study (up to 2 years and 9 months)OS was defined as the time from the start date of treatment to date of death due to any cause. Participants with no documented death were censored at the last date known to be alive.
Duration of Response (DOR) as Centrally Measured by Independent Review Committee (IRC)Up to disease progression or end of study (up to 2 years and 9 months)DOR was defined as the time from the date of the initial PR or CR to date of the first documented progression or death due to any cause. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Trough Concentration at Steady State (Ctrough,ss) of Debio 1347 in PlasmaPredose and post dose up to Cycle 2 Day 28 (each cycle length = 28 days)Geometric mean and geometric percent CV summary was estimated based on log-linear model.
Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of Debio 1347 in PlasmaPredose and post dose up to Cycle 2 Day 28 (each cycle length = 28 days)Geometric mean and geometric percent CV summary was estimated based on log-linear model.
Correlation of Debio 1347 Plasma Concentration (C) and QT Interval Corrected for Heart Rate Using Fridericia's Formula (QTcF)Pre-dose on Days 14 and 28, and 1, 3, 7 hours post-dose on Day 28 of Cycle 1; pre-dose on Days 14 and 28, and 3 hours post-dose on Day 28 of Cycle 2 (each cycle length = 28 days)
Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)From first dose of study drug up to 30 days post last dose (Up to 2 years and 9 months)An AE is any untoward medical occurrence in a participant or clinical trial participant administered a medicinal product and which does not necessarily have a causal relationship with this treatment. A TEAE is defined as an AE that either starts or worsens in severity on or after the first administration of the study drug and within 30 days of the last administration of the study drug. An SAE is any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or is medically significant.

Countries

Australia, Austria, Brazil, Bulgaria, Croatia, Czechia, Denmark, Finland, France, Greece, Netherlands, Norway, Philippines, Poland, Romania, Russia, Singapore, South Korea, Spain, Taiwan, Ukraine, United Kingdom, United States

Participant flow

Recruitment details

A total of 63 participants were enrolled at 31 investigational sites in the United States, France, Spain, Finland, Korea, Singapore, Australia, Bulgaria, Denmark, Norway, Russian Federation, Taiwan, and the United Kingdom from 22 March 2019 to 04 January 2022.

Pre-assignment details

A total of 63 participants with solid tumors harboring FGFR1-3 gene fusion/rearrangement were enrolled into one of the 3 cohorts: Cohort 1: Biliary Tract Cancer (N=30), Cohort 2: Urothelial Cancer (N=4), Cohort 3: All Other Solid Tumor Histologies (N=29) to receive Debio 1347.

Participants by arm

ArmCount
Cohort 1: Debio 1347 (Biliary Tract Cancer)
Participants with biliary tract cancer were included in this cohort to receive Debio 1347 80 mg tablets, orally, QD, from Day 1 to Day 28 in 28-day cycles until the occurrence of disease progression or unacceptable toxicity (up to a median duration of 20 weeks).
30
Cohort 2: Debio 1347 (Urothelial Cancer)
Participants with urothelial cancer were included in this cohort to receive Debio 1347 80 mg tablets, orally, QD, from Day 1 to Day 28 in 28-day cycles until the occurrence of disease progression or unacceptable toxicity (up to a median duration of 5.86 weeks).
4
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)
Participants with all other solid tumor histologies were included in this cohort to receive Debio 1347 80 mg tablets, orally, QD, from Day 1 to Day 28 in 28-day cycles until the occurrence of disease progression or unacceptable toxicity (up to a median duration of 8.14 weeks).
29
Total63

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event100
Overall StudyDeath8117
Overall StudyReason not Specified906
Overall StudySponsor/EthicsCommittee Decided to Terminate Study1014
Overall StudyWithdrawal of Consent222

Baseline characteristics

CharacteristicCohort 1: Debio 1347 (Biliary Tract Cancer)Cohort 2: Debio 1347 (Urothelial Cancer)Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Total
Age, Continuous59.1 years
STANDARD_DEVIATION 12.21
55.3 years
STANDARD_DEVIATION 15.22
60.0 years
STANDARD_DEVIATION 12.58
59.3 years
STANDARD_DEVIATION 12.4
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants0 Participants1 Participants2 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
29 Participants4 Participants28 Participants61 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Asian
3 Participants1 Participants2 Participants6 Participants
Race/Ethnicity, Customized
Black or African American
5 Participants0 Participants0 Participants5 Participants
Race/Ethnicity, Customized
Not Willing to Provide
1 Participants0 Participants3 Participants4 Participants
Race/Ethnicity, Customized
Other
1 Participants0 Participants2 Participants3 Participants
Race/Ethnicity, Customized
White
20 Participants3 Participants22 Participants45 Participants
Sex: Female, Male
Female
16 Participants2 Participants16 Participants34 Participants
Sex: Female, Male
Male
14 Participants2 Participants13 Participants29 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
9 / 301 / 417 / 29
other
Total, other adverse events
30 / 304 / 428 / 29
serious
Total, serious adverse events
14 / 302 / 47 / 29

Outcome results

Primary

Objective Response Rate (ORR) as Centrally Measured by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) Criteria

ORR was defined as the percentage of participants with a best overall response (BOR) of partial or complete response (PR or CR). BOR was defined as the best confirmed response observed from first administration of study drug until disease progression. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: Up to disease progression or end of study (up to 1 year and 9 months)

Population: ITT Population consisted of all participants who received study drug. Overall number of participants analyzed is the number of participants with measurable disease and tumor assessment at Baseline.

ArmMeasureValue (NUMBER)
Cohort 1: Debio 1347 (Biliary Tract Cancer)Objective Response Rate (ORR) as Centrally Measured by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) Criteria6.7 percentage of participants
Cohort 2: Debio 1347 (Urothelial Cancer)Objective Response Rate (ORR) as Centrally Measured by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) Criteria0 percentage of participants
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Objective Response Rate (ORR) as Centrally Measured by Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) Criteria4.0 percentage of participants
Secondary

Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of Debio 1347 in Plasma

Geometric mean and geometric percent CV summary was estimated based on log-linear model.

Time frame: Predose and post dose up to Cycle 2 Day 28 (each cycle length = 28 days)

Population: PK Population included participants who received one or more doses of Debio 1347 and have at least one PK concentration result available. Overall number of participants analyzed is the number of participants with data available for analyses.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Cohort 1: Debio 1347 (Biliary Tract Cancer)Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of Debio 1347 in Plasma23326.7 hour*nanogram (h*ng)/mLGeometric Coefficient of Variation 70.4
Cohort 2: Debio 1347 (Urothelial Cancer)Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of Debio 1347 in Plasma13999.0 hour*nanogram (h*ng)/mLGeometric Coefficient of Variation 39.1
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Area Under the Plasma Concentration-Time Curve Over the Dosing Interval at Steady State (AUCtau,ss) of Debio 1347 in Plasma18192.1 hour*nanogram (h*ng)/mLGeometric Coefficient of Variation 86.2
Secondary

Correlation of Debio 1347 Plasma Concentration (C) and QT Interval Corrected for Heart Rate Using Fridericia's Formula (QTcF)

Time frame: Pre-dose on Days 14 and 28, and 1, 3, 7 hours post-dose on Day 28 of Cycle 1; pre-dose on Days 14 and 28, and 3 hours post-dose on Day 28 of Cycle 2 (each cycle length = 28 days)

Population: The study was terminated by sponsor and thus the analysis for this outcome measure was not deemed necessary and no data was collected.

Secondary

Disease Control Rate (DCR) as Centrally Measured by Independent Review Committee (IRC)

DCR was defined as the percentage of participants with a BOR of confirmed CR, confirmed PR or stable disease (SD) ≥6 weeks. BOR was defined as the best confirmed response observed from first administration of study drug until disease progression. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD), taking as reference the smallest sum diameters while on study. PD was defined as ≥ 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study.

Time frame: Up to disease progression or end of study (up to 2 years and 9 months)

Population: ITT population consisted of all participants who received study drug. Percentages are rounded off to the nearest single decimal point.

ArmMeasureValue (NUMBER)
Cohort 1: Debio 1347 (Biliary Tract Cancer)Disease Control Rate (DCR) as Centrally Measured by Independent Review Committee (IRC)63.3 percentage of participants
Cohort 2: Debio 1347 (Urothelial Cancer)Disease Control Rate (DCR) as Centrally Measured by Independent Review Committee (IRC)0 percentage of participants
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Disease Control Rate (DCR) as Centrally Measured by Independent Review Committee (IRC)34.5 percentage of participants
Secondary

Duration of Response (DOR) as Centrally Measured by Independent Review Committee (IRC)

DOR was defined as the time from the date of the initial PR or CR to date of the first documented progression or death due to any cause. CR was defined as disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. PR was defined as ≥30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time frame: Up to disease progression or end of study (up to 2 years and 9 months)

Population: ITT Population consisted of all participants who received study drug. Only participants with best overall response of CR or PR were analyzed for this endpoint.

ArmMeasureValue (MEDIAN)
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Duration of Response (DOR) as Centrally Measured by Independent Review Committee (IRC)5.55 months
Secondary

Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)

An AE is any untoward medical occurrence in a participant or clinical trial participant administered a medicinal product and which does not necessarily have a causal relationship with this treatment. A TEAE is defined as an AE that either starts or worsens in severity on or after the first administration of the study drug and within 30 days of the last administration of the study drug. An SAE is any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or is medically significant.

Time frame: From first dose of study drug up to 30 days post last dose (Up to 2 years and 9 months)

Population: Safety Population consisted of all participants who received study drug.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Cohort 1: Debio 1347 (Biliary Tract Cancer)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)TEAEs30 Participants
Cohort 1: Debio 1347 (Biliary Tract Cancer)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)Serious TEAEs14 Participants
Cohort 2: Debio 1347 (Urothelial Cancer)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)TEAEs4 Participants
Cohort 2: Debio 1347 (Urothelial Cancer)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)Serious TEAEs2 Participants
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)TEAEs28 Participants
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Assessed by National Cancer Institute Common Terminology Criteria (NCI CTCAE) v5.0 and Serious Adverse Events (SAEs)Serious TEAEs7 Participants
Secondary

Overall Survival (OS)

OS was defined as the time from the start date of treatment to date of death due to any cause. Participants with no documented death were censored at the last date known to be alive.

Time frame: Until death or loss to follow-up or end of study (up to 2 years and 9 months)

Population: ITT population consisted of all participants who received study drug.

ArmMeasureValue (MEDIAN)
Cohort 1: Debio 1347 (Biliary Tract Cancer)Overall Survival (OS)NA months
Cohort 2: Debio 1347 (Urothelial Cancer)Overall Survival (OS)NA months
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Overall Survival (OS)7.13 months
Secondary

Progression-Free Survival (PFS) as Centrally Measured by Independent Review Committee (IRC)

PFS was defined as the time from the start date of treatment to date of the first documented progression or death due to any cause.

Time frame: From the start of the study up to disease progression or death (up to 2 years and 9 months)

Population: ITT population consisted of all participants who received study drug.

ArmMeasureValue (MEDIAN)
Cohort 1: Debio 1347 (Biliary Tract Cancer)Progression-Free Survival (PFS) as Centrally Measured by Independent Review Committee (IRC)3.68 months
Cohort 2: Debio 1347 (Urothelial Cancer)Progression-Free Survival (PFS) as Centrally Measured by Independent Review Committee (IRC)1.77 months
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Progression-Free Survival (PFS) as Centrally Measured by Independent Review Committee (IRC)1.84 months
Secondary

Trough Concentration at Steady State (Ctrough,ss) of Debio 1347 in Plasma

Geometric mean and geometric percent CV summary was estimated based on log-linear model.

Time frame: Predose and post dose up to Cycle 2 Day 28 (each cycle length = 28 days)

Population: Pharmacokinetic (PK) Population included participants who received one or more doses of Debio 1347 and have at least one PK concentration result available. Overall number of participants analyzed is the number of participants with data available for analysis.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Cohort 1: Debio 1347 (Biliary Tract Cancer)Trough Concentration at Steady State (Ctrough,ss) of Debio 1347 in Plasma619.6 nanogram per millilitre (ng/mL)Geometric Coefficient of Variation 100
Cohort 2: Debio 1347 (Urothelial Cancer)Trough Concentration at Steady State (Ctrough,ss) of Debio 1347 in Plasma306.8 nanogram per millilitre (ng/mL)Geometric Coefficient of Variation 43.4
Cohort 3: Debio 1347 (All Other Solid Tumor Histologies)Trough Concentration at Steady State (Ctrough,ss) of Debio 1347 in Plasma463.2 nanogram per millilitre (ng/mL)Geometric Coefficient of Variation 127.3

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026