Trial Outcomes & Findings for Study of Infigratinib in Combination With Tamoxifen in Hormone Receptor Positive, HER2 Negative, FGFR Altered Advanced Breast Cancer (NCT NCT04504331)

NCT ID: NCT04504331

Last Updated: 2026-02-12

Results Overview

The primary outcome for this study is dose-limiting toxicities (DLTs) during the first 2 cycles of therapy. All grades per the Common Terminology Criteria for Adverse Events (CTCAE). DLT is defined as a related and clinically significant adverse event (AE), including missed doses due to a related AE.

Recruitment status

TERMINATED

Study phase

PHASE1

Target enrollment

4 participants

Primary outcome timeframe

8 weeks

Results posted on

2026-02-12

Participant Flow

Enrollment was closed before any participants were enrolled in Cohort 3 (Infigratinib (75 mg) + Tamoxifen).

Participant milestones

Participant milestones
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Cohort 3: Infigratinib (75mg) + Tamoxifen
In study part 1 (dose exploration), participants receive infigratinib up to 75 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Dose Level 1 (up to 18 28-day Cycles+FU)
STARTED
3
0
0
Dose Level 1 (up to 18 28-day Cycles+FU)
Completed at Least 6 Treatment Cycles
3
0
0
Dose Level 1 (up to 18 28-day Cycles+FU)
COMPLETED
3
0
0
Dose Level 1 (up to 18 28-day Cycles+FU)
NOT COMPLETED
0
0
0
Dose Level 2 (up to 18 28-day Cycles+FU)
STARTED
0
1
0
Dose Level 2 (up to 18 28-day Cycles+FU)
Completed at Least 6 Treatment Cycles
0
0
0
Dose Level 2 (up to 18 28-day Cycles+FU)
COMPLETED
0
1
0
Dose Level 2 (up to 18 28-day Cycles+FU)
NOT COMPLETED
0
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Study of Infigratinib in Combination With Tamoxifen in Hormone Receptor Positive, HER2 Negative, FGFR Altered Advanced Breast Cancer

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Total
n=4 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Age, Categorical
Between 18 and 65 years
2 Participants
n=41 Participants
1 Participants
n=1581 Participants
3 Participants
n=4626 Participants
Age, Categorical
>=65 years
1 Participants
n=41 Participants
0 Participants
n=1581 Participants
1 Participants
n=4626 Participants
Age, Continuous
55.2 years
STANDARD_DEVIATION 9.6 • n=41 Participants
38.5 years
STANDARD_DEVIATION NA • n=1581 Participants
53.9 years
STANDARD_DEVIATION 13.0 • n=4626 Participants
Sex: Female, Male
Female
3 Participants
n=41 Participants
1 Participants
n=1581 Participants
4 Participants
n=4626 Participants
Sex: Female, Male
Male
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants
n=41 Participants
0 Participants
n=1581 Participants
1 Participants
n=4626 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
2 Participants
n=41 Participants
1 Participants
n=1581 Participants
3 Participants
n=4626 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Race (NIH/OMB)
Asian
1 Participants
n=41 Participants
0 Participants
n=1581 Participants
1 Participants
n=4626 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Race (NIH/OMB)
White
2 Participants
n=41 Participants
1 Participants
n=1581 Participants
3 Participants
n=4626 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=41 Participants
0 Participants
n=1581 Participants
0 Participants
n=4626 Participants
Region of Enrollment
United States
3 Participants
n=41 Participants
1 Participants
n=1581 Participants
4 Participants
n=4626 Participants

PRIMARY outcome

Timeframe: 8 weeks

The primary outcome for this study is dose-limiting toxicities (DLTs) during the first 2 cycles of therapy. All grades per the Common Terminology Criteria for Adverse Events (CTCAE). DLT is defined as a related and clinically significant adverse event (AE), including missed doses due to a related AE.

Outcome measures

Outcome measures
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Number of Dose-limiting Toxicities (DLTs)
0 DLTs
0 DLTs

SECONDARY outcome

Timeframe: From first dose to 30 days after the last dose of study drug (up to 94 days)

Treatment emergent adverse events (TEAEs) are defined as adverse events of any grade with initial onset or increasing in severity after the first dose of study treatment until 30 days after last dose of study drug. Pregnancy during the reporting period will be classified as a serious adverse event.

Outcome measures

Outcome measures
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Number of Treatment Emergent Adverse Events (TEAE)
49 adverse events
26 adverse events

SECONDARY outcome

Timeframe: From enrollment to day of scan (up to 64 days)

Objective tumor response will be assessed as achieving a Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 Complete Response (CR) or a Partial Response (PR). The outcome will be reported as the number of subjects that achieve an overall response (OR) to treatment, ie, CR or PR, within 18 months of starting treatment. RECIST criteria are: * CR = Disappearance of all target lesions * PR = ≥ 30% decrease in the sum of the longest diameter of target lesions * Overall Response (OR) = CR + PR * Progressive disease (PD) = 20% increase in the sum of the longest diameter of target lesions, and/or the appearance of one or more new lesion(s) * Stable disease (SD) = Small changes that do not meet any of the above criteria

Outcome measures

Outcome measures
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Objective Tumor Response Rate
CR
0 Participants
0 Participants
Objective Tumor Response Rate
OR (CR + PR)
0 Participants
0 Participants
Objective Tumor Response Rate
PR
0 Participants
0 Participants
Objective Tumor Response Rate
PD
3 Participants
0 Participants
Objective Tumor Response Rate
SD
0 Participants
1 Participants

SECONDARY outcome

Timeframe: up to 9 months

Progression free survival (PFS) means the participant remains alive without return or relapse of the tumor. The outcome is defined as the number of days to either progressive disease as defined per RECIST v1.1 or death. RECIST criteria are: * CR = Disappearance of all target lesions * PR = ≥ 30% decrease in the sum of the longest diameter of target lesions * Overall Response (OR) = CR + PR * Progressive disease (PD) = 20% increase in the sum of the longest diameter of target lesions, and/or the appearance of one or more new lesion(s) * Stable disease (SD) = Small changes that do not meet any of the above criteria

Outcome measures

Outcome measures
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Progression-free Survival (PFS)
61 days
Standard Deviation 5.3
NA days
Not evaluable due to insufficient number of events

SECONDARY outcome

Timeframe: 6 months

Population: Participants who completed at least 6 treatment cycles are included in the analysis.

Clinical benefit (CB) is defined as achieving a Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 Complete Response (CR) ; Partial Response (PR); or Stable Disease (SD). The outcome will be reported as the number of subjects that achieve CR, PR, or SD. RECIST criteria are: * CR = Disappearance of all target lesions * PR = ≥ 30% decrease in the sum of the longest diameter of target lesions * SD = Small changes that do not meet any of the above criteria * Progressive disease (PD) = 20% increase in the sum of the longest diameter of target lesions, and/or the appearance of one or more new lesion(s)

Outcome measures

Outcome measures
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 Participants
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Clinical Benefit Rate
CR
0 Participants
Clinical Benefit Rate
PR
0 Participants
Clinical Benefit Rate
SD
0 Participants
Clinical Benefit Rate
CB (CR + PR +SD)
0 Participants
Clinical Benefit Rate
PD
3 Participants

Adverse Events

Cohort 1: Infigratinib (100mg) + Tamoxifen

Serious events: 1 serious events
Other events: 3 other events
Deaths: 0 deaths

Cohort 2: Infigratinib (125mg) + Tamoxifen

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 participants at risk
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 participants at risk
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Cardiac disorders
Atrioventricular block complete
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months

Other adverse events

Other adverse events
Measure
Cohort 1: Infigratinib (100mg) + Tamoxifen
n=3 participants at risk
In study part 1 (dose exploration), participants receive infigratinib up to 100 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/day tamoxifen
Cohort 2: Infigratinib (125mg) + Tamoxifen
n=1 participants at risk
In study part 1 (dose exploration), participants receive infigratinib up to 125 mg administered orally daily, 3 weeks on, 1 week off + 20 mg/ day tamoxifen
Renal and urinary disorders
Urinary tract pain
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Respiratory, thoracic and mediastinal disorders
Nasal congestion
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Respiratory, thoracic and mediastinal disorders
Sinusitis
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Respiratory, thoracic and mediastinal disorders
Dry nose
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Reproductive system and breast disorders
Other - pulling sensation in uterus
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Reproductive system and breast disorders
Other - yeast infection
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Skin and subcutaneous tissue disorders
Alopecia
33.3%
1/3 • Number of events 1 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Skin and subcutaneous tissue disorders
Contusion
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Skin and subcutaneous tissue disorders
Dry skin
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Skin and subcutaneous tissue disorders
Erythema
33.3%
1/3 • Number of events 1 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Skin and subcutaneous tissue disorders
Flushing
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Skin and subcutaneous tissue disorders
Other - Eyelash thickening
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Skin and subcutaneous tissue disorders
Nail discoloration
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Vascular disorders
Cerebrovascular accident
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Vascular disorders
Contusion
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Vascular disorders
Flushing
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Vascular disorders
Hematoma
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Vascular disorders
Retinopathy
33.3%
1/3 • Number of events 2 • Up to 9 months
0.00%
0/1 • Up to 9 months
Metabolism and nutrition disorders
Hypophosphtaemia
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Musculoskeletal and connective tissue disorders
Chills
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Musculoskeletal and connective tissue disorders
Contusion
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Musculoskeletal and connective tissue disorders
Muscle spasms
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Musculoskeletal and connective tissue disorders
Muscular weakness
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Nervous system disorders
Peripheral sensory neuropathy
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Nervous system disorders
Vision blurred
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Nervous system disorders
Dizziness
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Nervous system disorders
Tremor
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Psychiatric disorders
Irritability
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Psychiatric disorders
Insomnia
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Psychiatric disorders
Depression
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Musculoskeletal and connective tissue disorders
Myalgia of lower extremities
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Nervous system disorders
Cerebrovascular accident
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Nervous system disorders
Dysgeusia
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Nervous system disorders
Muscular weakness
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Metabolism and nutrition disorders
Hyperphosphataemia
100.0%
3/3 • Number of events 4 • Up to 9 months
100.0%
1/1 • Number of events 3 • Up to 9 months
Cardiac disorders
Atrial tachycardia
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Eye disorders
Retinopathy
33.3%
1/3 • Number of events 2 • Up to 9 months
0.00%
0/1 • Up to 9 months
Eye disorders
Vision blurred
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Eye disorders
Dry Eye
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Eye disorders
Eye pain
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Eye disorders
Other - corneal endothelial cell count decreased
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Gastrointestinal disorders
Constipation
66.7%
2/3 • Number of events 2 • Up to 9 months
0.00%
0/1 • Up to 9 months
Gastrointestinal disorders
Dysgeusia
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Gastrointestinal disorders
Dry mouth
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
General disorders
Chills
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
General disorders
Flushing
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
General disorders
Irritability
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
General disorders
Pain
66.7%
2/3 • Number of events 6 • Up to 9 months
0.00%
0/1 • Up to 9 months
General disorders
Flu like symptoms
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
General disorders
Fever
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
General disorders
Fatigue
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 2 • Up to 9 months
Immune system disorders
Immune system disorder
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Infections and infestations
Sinusitis
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Injury, poisoning and procedural complications
Contusion
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Investigations
Aspartate aminotransferase increased
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Investigations
Blood creatinine increased
33.3%
1/3 • Number of events 1 • Up to 9 months
0.00%
0/1 • Up to 9 months
Investigations
Neutrophil count decreased
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months
Investigations
Platelet count decreased
0.00%
0/3 • Up to 9 months
100.0%
1/1 • Number of events 1 • Up to 9 months

Additional Information

Jennifer Lee Caswell-Jin, MD

Stanford Medicine at Stanford University

Phone: 1-310-332-6541

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place