Skip to content

Evaluating Dose Timing (Morning vs Evening) of Endocrine-based Therapies in Metastatic Breast and Prostate Cancers

A Randomised, Multicentre Trial Evaluating the Dose Timing (Morning vs Evening) of Endocrine-based Therapies in Metastatic Breast and Prostate Cancers (REaCT-CHRONO-MetBP Pilot Study)

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07252726
Enrollment
50
Registered
2025-11-28
Start date
2026-02-02
Completion date
2033-03-01
Last updated
2026-07-17

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

Conditions

Metastatic Breast Cancer, Metastatic Prostate Cancer

Keywords

Chronotherapy, breast cancer, prostate cancer, endocrine therapy, metastatic cancer

Brief summary

The REaCT-CHRONO-MetBP Pilot study will compare morning and evening administration of endocrine-based therapy in metastatic breast and prostate cancers. Participants with metastatic breast or prostate cancer will be randomly placed in one of two groups: a morning group and an evening group. The group assignment will determine whether they take their endocrine therapy in the morning or the evening. The primary outcome of this pilot study is to evaluate the feasibility of study procedures in order to conduct a larger definitive trial in the future. The secondary outcomes include comparing quality of life, tolerability, and efficacy outcomes between the morning and evening groups for each of the two cancer cohorts (metastatic breast and prostate cancer).

Interventions

OTHERMorning administration of CDK4/6 inhibitor

Morning administration of cyclin-dependent kinase (CDK) 4/6 inhibitor defined as, within one hour of the participant wake up time.

OTHEREvening administration of CDK4/6 inhibitor

Evening administration of cyclin-dependent kinase (CDK) 4/6 inhibitor defined as, within one hour of the participant bedtime.

OTHERMorning administration of ARPI

Morning administration of androgen receptor pathway inhibitors (ARPI) defined as, within one hour of the patient wake up time.

OTHEREvening administration of ARPI

Evening administration of androgen receptor pathway inhibitors (ARPI) defined as, within one hour of the patient bedtime.

Sponsors

Ottawa Hospital Research Institute
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Masking description

Participants and investigators will not be blinded to treatment allocation as the study is only randomizing treatment schedule.

Intervention model description

There will be 2 cohorts. Cohort A is for participants with breast cancer. Participants in Cohort A will be randomized to either morning or evening administration of endocrine-based therapy for breast cancer. Cohort B is for participants with prostate cancer. Participants in Cohort B will be randomized to either morning or evening administration of endocrine-based therapy for prostate cancer.

Eligibility

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

Inclusion criteria

Cohort A (Breast Cohort) Inclusion Criteria * Patients with metastatic hormonal receptor positive breast cancer * Plan to receive endocrine therapy and a CDK4/6 inhibitor (either Ribociclib or Palbociclib) in the first-line metastatic setting * Age ≥18 years * Able to provide oral consent * Willing and able to complete questionnaires as per study protocol Cohort A (Breast Cohort)

Exclusion criteria

* Any contraindication in taking endocrine therapy and CDK4/6 inhibitor in the morning or evening * Plan to receive abemaciclib (as this requires twice a day dosing) Cohort B (Prostate Cancer) Inclusion Criteria * Patients with metastatic castrate sensitive prostate cancer * Plan to receive androgen receptor pathway inhibitor (either enzalutamide, apalutamide or abiraterone acetate) in combination with androgen deprivation therapy * Age ≥18 years * Able to provide oral consent * Willing and able to complete questionnaires as per study protocol Cohort B (Prostate Cancer)

Design outcomes

Primary

MeasureTime frameDescription
Feasibility: accrual per site1 yearFeasibility will be assessed according to a combination of metrics, including the accrual of at least 25 patients per cohort in one year for a total of three sites
Feasibility: participation rateThe accrual period, approximately 1 yearFeasibility will be assessed according to a combination of metrics, including participation rate of at least 60% among patients approached.
Feasibility: number of participants who received allocated intervention4 weeksFeasibility will be assessed according to a combination of metrics, including at least 80% of enrolled patients receive treatment as per their allocated intervention for at least 4 weeks.

Secondary

MeasureTime frameDescription
Health-related quality of life: Functional Assessment of Cancer Therapy-GeneralBaseline and 4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsHealth-related quality of life using Functional Assessment of Cancer Therapy-General (FACT-G). Cohort A and Cohort B will answer the FACT-G. FACT-G has a score range of 0 to 108. Higher scores indicate better quality of life.
Health-related quality of life: Functional Assessment of Cancer Therapy-Endocrine SymptomsBaseline and 4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsHealth-related quality of life using Functional Assessment of Cancer Therapy-Endocrine Symptoms (FACT-ES). Cohort A and Cohort B will answer the FACT-ES. FACT-ES has a score range of 0 to 184. Higher scores indicate better quality of life.
Health-related quality of life: Functional Assessment of Cancer Therapy-BreastBaseline and 4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsHealth-related quality of life using Functional Assessment of Cancer Therapy-Breast (FACT-B). Cohort A will complete the FACT-B. FACT-B has a score range of 0 to 148. Higher scores indicate better quality of life.
Health-related quality of life: Functional Assessment of Cancer Therapy-ProstateBaseline and 4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsHealth-related quality of life using Functional Assessment of Cancer Therapy-Prostate (FACT-P). Cohort B will complete the FACT-P. FACT-P has a score range of 0 to 156. Higher scores indicate better quality of life.
Number of changes in treatment dose5 years
Number of treatment interruptions5 years
Number of treatment discontinuations5 years
Cohort A's adverse events of interest4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsThe number of participants in Cohort A that experience QTc prolongation, neutropenia, febrile neutropenia, hepatobiliary function.
Cohort B's adverse events of interest4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsThe number of participants in Cohort B that experience hypertension, hyperglycemia, rash, hypothyroidism, fatigue.
Adherence to treatment4-, 12-, 26-, 52-weeks, 2-years, 3-years, 4-years, 5-yearsAdherence to treatment measured by the Five-Item Medication Adherence Report Scale (MARS-5 score). The MARS-5 has a range of 5-25. Higher scores indicate high adherence.
Participant preference in dose timingBaselineParticipants rank their preference on a scale of 0 to 10, where 0=prefer to take treatment in the morning, 5=no preference, 10=prefer to take treatment in the evening.

Countries

Canada

Contacts

CONTACTLisa Vandermeer, MSc
lvandermeer@ohri.ca613-737-7700
CONTACTDeanna Saunders, MSc
dsaunders@ohri.ca613-737-7700
PRINCIPAL_INVESTIGATORMarie-France Savard, MD

The Ottawa Hospital

PRINCIPAL_INVESTIGATORAna-Alicia Beltran-Bless, MD

The Ottawa Hospital

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 18, 2026