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Bexarotene in Preventing Breast Cancer in Patients at High Risk for Breast Cancer

A Phase I Dose Escalation Study of Topical Bexarotene in Women at High Risk for Breast Cancer

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03323658
Enrollment
24
Registered
2017-10-27
Start date
2018-06-15
Completion date
2022-03-25
Last updated
2023-01-10

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

Conditions

Breast Atypical Ductal Hyperplasia, Breast Atypical Lobular Hyperplasia, Breast Ductal Carcinoma In Situ, Breast Lobular Carcinoma In Situ, Invasive Breast Carcinoma

Brief summary

This phase I trial studies the side effects and best dose of bexarotene in preventing breast cancer in patients at high risk for breast cancer. Bexarotene belongs to a class of drugs that are called rexinoids, and it may reduce the incidence of breast tumors.

Detailed description

PRIMARY OBJECTIVES: I. To determine the recommended phase II dose of topical bexarotene 1% (weight by weight \[w/w\]) gel for evaluation in healthy women. (Dose Escalation Group) II. Conduct an intervention of topical 1% bexarotene gel to an unaffected breast of healthy women at high risk for breast cancer for 4 weeks at the maximum tolerated dose (MTD) as determined during the dose escalation group phase to assess bexarotene concentration in the breast tissue. (Dose Expansion Group) SECONDARY OBJECTIVES: I. To detect bexarotene concentration in the serum at baseline and at 4 weeks of treatment. II. To detect bexarotene concentration in the breast tissue at 4 weeks of treatment in the dose escalation group. III. To investigate the effects of topical bexarotene on serum biomarkers, we will determine the change from baseline in i) lipid biomarkers (total cholesterol, triglycerides, low density lipoprotein \[LDL\], high density lipoprotein \[HDL\]), ii) thyroid function biomarkers (thyroid stimulating hormone \[TSH\], T4, T3), iii) calcium. EXPLORATORY OBJECTIVE: I. To examine changes in gene expression associated with retinoid action. (Dose Expansion Group) OUTLINE: This is a dose-escalation study. Group 1 will apply 10mg bexarotene topically to one breast every other day (QOD) for 4 weeks; Group 2 will apply 10mg bexarotene topically to one breast every other day (QOD) for 1 week and then daily for 3 weeks after confirmation that toxicity is at an acceptable range; Group 3 will apply 10mg bexarotene topically to one breast every other day (QOD) for 1 week, then daily for 1 week, and then 20mg daily for 2 weeks after confirmation that toxicity is at an acceptable range. After completion of study treatment, patients are followed up at 30 days.

Interventions

DRUGBexarotene

Given topically

OTHERQuestionnaire Administration

Ancillary studies

Sponsors

National Cancer Institute (NCI)
Lead SponsorNIH

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Participants must be at high risk as defined by a history of breast cancer (invasive or ductal breast carcinoma in situ \[DCIS\]) and be at least 5 years out from diagnosis, or lobular carcinoma in situ (LCIS), or proliferative benign breast disease such atypical ductal hyperplasia (ADH), atypical lobular hyperplasia (ALH) or genetic test confirmation of BRCA 1/2 mutation carrier or have a breast cancer risk assessment \>= 1.7% in 5 years or a lifetime risk \>= 20% * No evidence of disease (in situ or invasive cancer that would normally be treated by resection) at trial entry as determined by the investigator; diagnosis of invasive cancer must be at least 5 years prior to initiation on trial * Eastern Cooperative Oncology Group (ECOG) performance status =\< 1 (Karnofsky \>= 70%) * Leukocytes \>= 3,000/microliter * Absolute neutrophil count \>= 1,500/microliter * Platelets \>= 100,000/microliter * Total bilirubin within normal institutional limits * Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase \[SGOT\])/alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase \[SGPT\]) =\< 1.5 x institutional upper limit of normal (ULN) * Creatinine =\< 1.5 x institutional ULN * Hemoglobin \>= 10 g/dL * Thyroid-stimulating hormone (TSH) within normal institutional limits * Triglycerides =\< 300 mg/dl * Total cholesterol =\< 300 mg/dl * \>= 6 months from all previous breast cancer treatment (including endocrine therapy) * Participants must have adequate accessible breast tissue as determined by the treating physician, consisting of one breast unaffected by invasive cancer, which has not been radiated; a history of benign core biopsy of this breast will be permitted * Participants need to have had any breast imaging with a normal/benign (bi-rads 1 or 2) result within 180 days of day 0 and no further routine breast imaging planned during the course of the study (4 weeks); exception: if the mammogram result was a bi-rads 0 and the imaging work-up (ultrasound and/or magnetic resonance imaging \[MRI\]) result comes back normal/benign (bi-rads 1 or 2) before treatment initiation, then participant is eligible. * For women of childbearing potential; negative pregnancy testing within 72 hours prior to or on study visit #1 (day 0) and willingness to use adequate contraception during the study intervention; OR post-menopausal defined as any one of the following 1) prior hysterectomy, 2) absence of menstrual period for 1 year in the absence of prior chemotherapy or 3) absence of menstrual period for 2 years in women with a prior history of chemotherapy exposure who were pre-menopausal prior to chemotherapy; in women of childbearing potential, effective contraception must be used for one month prior to the initiation of therapy, during therapy, and for at least one month following discontinuation of therapy; it is recommended that two reliable forms of contraception be used simultaneously; if participants are interested in enrolling and have not met the requirement for contraception, they will be seen in the clinic in 1 month for re-evaluation once they have met this requirement and ensure all other eligibility criteria is met prior to dose assignment * Willingness to comply with all study interventions and follow-up procedures including the ability to apply the study drug to the breast * Ability to understand and the willingness to sign a written informed consent document * Ability to avoid exposure of the treated breast area to sunlight and artificial ultraviolet light during the use of bexarotene gel

Exclusion criteria

* History of allergic reactions attributed to compounds of similar chemical or biologic composition to bexarotene gel, oral or topical retinoids * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, thromboembolic disease, or psychiatric illness/social situations that would limit compliance with study requirements * Pregnant, or had given birth, or nursed at any time during the last 12 months * Women with a history of any cancer within the last 3 years, except for non-melanoma skin cancer; history of breast cancer must be at least \> 5 years from diagnosis * Prior bilateral breast surgery (mastectomy, segmental mastectomy, or breast augmentation surgery including breast implants or breast reductions) or combination of breast radiation and surgery involving both breasts * Prior history or evidence of metastatic breast cancer * Prior history of histologically confirmed bilateral invasive breast cancer * Current use or \< 6 months since use of selective estrogen receptor modulator (SERMS) or aromatase inhibitors or any other investigational treatment for breast cancer prevention or therapy * Skin lesions that disrupt the stratum corneum (e.g., eczema, ulceration) or any breakdown of the skin * Current use of a retinol containing agent or any retinoid analogue drug within the last 30 days * Dietary vitamin A intake \>= 5,000 IU/day (as determined by dietary supplementation) * Treatment with any investigational drug or investigational biologic within 30 days of initiating study treatment or during the study * History of human immunodeficiency virus (HIV) or active hepatitis C

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)4 weeks of treatment, Up to 30 days after completion of study drug for AE assessmentsDose Limiting Toxicity (DLT) is defined as a grade 2 skin adverse event that persists for at least 6 days or any grade 3 or greater adverse event possibly, probably, or definitely related to the study drug. In addition, a DLT will be a grade 2 skin adverse event that recurs and persists for at least 3 days.

Secondary

MeasureTime frameDescription
Number of Participants With Changes in Markers of Systemic ToxicityBaseline up to 28 daysSerum biomarkers to be tested will be total cholesterol, triglycerides, low-density lipoprotein, high-density lipoprotein, thyroid-stimulating hormone, T4, T3, and calcium. Will be summarized using mean, standard deviation and median (range) for continuous variables at each time point. Wilcoxon rank-sum test may be used to examine the difference of continuous variables between participants' characteristics groups. Will be plotted as functions of time (baseline, week 1, week 2, and week 4). Linear mixed effect model will be applied to model the biomarker change over time for all participants. Appropriate transformation and regression model will be used to ensure the model fit.
Number of Participants With Trace Level of Bexarotene Concentration in Plasma Detectedbaseline and end of treatment, up to 4 weeksPlasma concentrations of bexarotene were evaluated in all participants at baseline and at end of study. Plasma samples: ND = Not detected (below the quantitation limit of 0.5 ng/mL) TDL = Trace levels detected (below the LOQ of 0.5ng/mL; estimated value)
Number of Participants With Bexarotene Concentration in Tissueend of treatment, up to 4 weeksBreast tissue concentrations were available only in those women who underwent breast biopsies. Tissue samples: Not detected (below the quantitation limit of 2.5 ng/g for a 10mg sample) and Trace levels detected (below the LOQ of 2.5ng/g; estimated value).

Other

MeasureTime frameDescription
Tissue Markersbaseline, 15, and Day 28 visitsOne of the four cores collected from the core biopsies from baseline (in dose expansion cohort only) and post treatment (all dose expansion cohort participants and optional for dose escalation group) will be formalin-fixed and paraffin embedded (FFPE) for histological analysis. One of the four cores collected from the core biopsies from baseline and post treatment will be placed in RNALater and utilized for gene expression of ribonucleic acid (RNA) biomarkers. Gene expression will be performed.

Countries

United States

Participant flow

Recruitment details

Women at high risk for breast cancer were recruited for the trial at the Cancer Prevention Center at MD Anderson Cancer Center.

Pre-assignment details

41 participants were consented, 17 were not randomized due to (1 )Dose escalation phase closed and (16) were not eligible.

Participants by arm

ArmCount
Dose Level 1
Bexarotene 1 % gel 10 mg every other day
10
Dose Level 2
Bexarotene 1 % gel 10 mg daily
4
Expansion Cohort
Bexarotene 1 % gel 10 mg every other day
10
Total24

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event010

Baseline characteristics

CharacteristicDose Level 2Expansion CohortDose Level 1Total
Age, Customized
40-49 years
0 Participants1 Participants2 Participants3 Participants
Age, Customized
50-59 years
0 Participants6 Participants3 Participants9 Participants
Age, Customized
60-69 years
3 Participants2 Participants5 Participants10 Participants
Age, Customized
70 and over years
1 Participants1 Participants0 Participants2 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
4 Participants9 Participants10 Participants23 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants1 Participants0 Participants1 Participants
Menopause
Post-Menopausal
4 Participants7 Participants8 Participants19 Participants
Menopause
Pre-Menopausal
0 Participants3 Participants2 Participants5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants2 Participants4 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants1 Participants0 Participants1 Participants
Race (NIH/OMB)
White
3 Participants8 Participants8 Participants19 Participants
Region of Enrollment
United States
4 participants10 participants10 participants24 participants
Sex: Female, Male
Female
4 Participants10 Participants10 Participants24 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 100 / 40 / 10
other
Total, other adverse events
9 / 104 / 410 / 10
serious
Total, serious adverse events
0 / 100 / 40 / 10

Outcome results

Primary

Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)

Dose Limiting Toxicity (DLT) is defined as a grade 2 skin adverse event that persists for at least 6 days or any grade 3 or greater adverse event possibly, probably, or definitely related to the study drug. In addition, a DLT will be a grade 2 skin adverse event that recurs and persists for at least 3 days.

Time frame: 4 weeks of treatment, Up to 30 days after completion of study drug for AE assessments

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Dose Level 1Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Erythema/redness at application site0 Participants
Dose Level 1Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Maculopapular rash with pruritus at application site0 Participants
Dose Level 2Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Maculopapular rash with pruritus at application site1 Participants
Dose Level 2Number of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Erythema/redness at application site1 Participants
Expansion CohortNumber of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Maculopapular rash with pruritus at application site1 Participants
Expansion CohortNumber of Participants With Incidence of Adverse Events (Dose Limiting Toxicities)Erythema/redness at application site0 Participants
Secondary

Number of Participants With Bexarotene Concentration in Tissue

Breast tissue concentrations were available only in those women who underwent breast biopsies. Tissue samples: Not detected (below the quantitation limit of 2.5 ng/g for a 10mg sample) and Trace levels detected (below the LOQ of 2.5ng/g; estimated value).

Time frame: end of treatment, up to 4 weeks

Population: 1 participant was to analyzed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Dose Level 1Number of Participants With Bexarotene Concentration in TissueNon Detected1 Participants
Dose Level 1Number of Participants With Bexarotene Concentration in TissueTrace Levels Detected1 Participants
Dose Level 1Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 2.6-10 ng/g1 Participants
Dose Level 1Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 11-20 ng/g1 Participants
Dose Level 1Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 21-30 ng/g1 Participants
Dose Level 1Number of Participants With Bexarotene Concentration in TissueQuantitation limit of >30 ng/g0 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueQuantitation limit of >30 ng/g0 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueNon Detected0 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 11-20 ng/g1 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 21-30 ng/g0 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueTrace Levels Detected0 Participants
Dose Level 2Number of Participants With Bexarotene Concentration in TissueQuantitation limit of 2.6-10 ng/g0 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueTrace Levels Detected2 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueQuantitation limit of 2.6-10 ng/g1 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueQuantitation limit of >30 ng/g1 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueQuantitation limit of 11-20 ng/g1 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueNon Detected4 Participants
Expansion CohortNumber of Participants With Bexarotene Concentration in TissueQuantitation limit of 21-30 ng/g0 Participants
Secondary

Number of Participants With Changes in Markers of Systemic Toxicity

Serum biomarkers to be tested will be total cholesterol, triglycerides, low-density lipoprotein, high-density lipoprotein, thyroid-stimulating hormone, T4, T3, and calcium. Will be summarized using mean, standard deviation and median (range) for continuous variables at each time point. Wilcoxon rank-sum test may be used to examine the difference of continuous variables between participants' characteristics groups. Will be plotted as functions of time (baseline, week 1, week 2, and week 4). Linear mixed effect model will be applied to model the biomarker change over time for all participants. Appropriate transformation and regression model will be used to ensure the model fit.

Time frame: Baseline up to 28 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Dose Level 1Number of Participants With Changes in Markers of Systemic Toxicity0 Participants
Dose Level 2Number of Participants With Changes in Markers of Systemic Toxicity0 Participants
Expansion CohortNumber of Participants With Changes in Markers of Systemic Toxicity1 Participants
Secondary

Number of Participants With Trace Level of Bexarotene Concentration in Plasma Detected

Plasma concentrations of bexarotene were evaluated in all participants at baseline and at end of study. Plasma samples: ND = Not detected (below the quantitation limit of 0.5 ng/mL) TDL = Trace levels detected (below the LOQ of 0.5ng/mL; estimated value)

Time frame: baseline and end of treatment, up to 4 weeks

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Dose Level 1Number of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma Baseline Visit0 Participants
Dose Level 1Number of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma End of Treatment Visit0 Participants
Dose Level 2Number of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma Baseline Visit0 Participants
Dose Level 2Number of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma End of Treatment Visit0 Participants
Expansion CohortNumber of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma End of Treatment Visit2 Participants
Expansion CohortNumber of Participants With Trace Level of Bexarotene Concentration in Plasma DetectedPlasma Baseline Visit0 Participants
Other Pre-specified

Tissue Markers

One of the four cores collected from the core biopsies from baseline (in dose expansion cohort only) and post treatment (all dose expansion cohort participants and optional for dose escalation group) will be formalin-fixed and paraffin embedded (FFPE) for histological analysis. One of the four cores collected from the core biopsies from baseline and post treatment will be placed in RNALater and utilized for gene expression of ribonucleic acid (RNA) biomarkers. Gene expression will be performed.

Time frame: baseline, 15, and Day 28 visits

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026