AzTrials
AzTrials

Anatomic Stage I Breast Cancer AJCC v8Phase 2NCT06042569

Dose-Reduced Docetaxel With Cyclophosphamide for the Treatment of Vulnerable Older Women With Stage I-III HER2 Negative Breast Cancer, the DOROTHY Trial

A Phase 2 study testing Cyclophosphamide, Docetaxel and Medical Chart Review in people with Anatomic Stage I Breast Cancer AJCC v8 and Anatomic Stage II Breast Cancer AJCC v8, run by City of Hope Medical Center at 3 sites in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This phase II trial tests how well dose-reduced docetaxel combined with cyclophosphamide works in treating older women with early stage (stage I-III) HER2 negative breast cancer vulnerable to toxicity. Read more about this study

Who is it for?
Ages 65 years and older
What is being tested?
Cyclophosphamide, Docetaxel and Medical Chart Review
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
174 participants
Where
3 sitesUnited States
Study dates
16 Sep 2024to 20 Sep 2031
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 65 years and older
  • All sexes
  • No healthy volunteers
  • Older adult

Who may be able to join

  • Ability to provided informed consent or a legally authorized representative is able to consent on behalf of the patient
  • Willing to answer questionnaires as part of their participation
  • Age: >= 65 years by the time of study registration
  • Histologically or cytologically confirmed breast cancer(s) that is human epidermal growth factor receptor 2 negative (HER2-negative) per the most recent 2018 American Society of Clinical Oncology College of American Pathologists (ASCO CAP) guidelines relapsed/ refractory disease
  • Estrogen receptor and progesterone receptor immunohistochemistry (IHC) status must be known; any estrogen receptor (ER)/progesterone receptor (PR) status is eligible
  • Non-metastatic, invasive breast cancer (scans are not required to document non-metastatic disease- any staging work-up is up to the treating providers' discretion)
Show all 11Show fewer
  • Recommended to have either standard dose neoadjuvant docetaxel, cyclophosphamide (TC) chemotherapy or adjuvant TC chemotherapy per their treating provider. Participant may be on immunotherapy concurrently with the protocol regimen at the discretion of the treating physician
  • Any surgery, nodal assessment, radiation, hormonal therapy is left up to the treating provider but should not occur concurrently with study therapy
  • Any patient who received pre-operative hormonal therapy and who is then recommended for neo/adjuvant chemotherapy is eligible, though hormonal therapy should be held during study treatment administration
  • For patients with bilateral or multifocal/multicentric breast cancers, the following criteria must be met to enroll: (1) both cancer are HER2 negative, AND (2) the provider feels the patient will benefit from TC for at least one of the cancers
  • Patients who do not speak or read English are eligible as long as adequate interpreter services are available or the surveys are available in the preferred language (i.e. the Geriatric Assessment [GA] and Patient Reported Outcomes [PRO] surveys are available in many languages)

Who cannot join

  • Participants who have already received any chemotherapy for their current breast cancer
  • Patients with recurrent and/or metastatic disease will be excluded. Prior diagnoses of breast cancers (including ductal carcinoma in situ [DCIS]) are allowed, provided that the treating provider feels that the current cancer most likely represents a new primary breast cancer and not recurrent disease
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to cyclophosphamide and/or docetaxel
  • Past treatment with the regimen TC for prior breast cancer

Trial locations and contacts

3 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Thanh Nga Doan, MD contact

626-321-1845

tdoan@coh.org

United States3 sites, 3 recruiting
  • Dana-Farber Cancer Institute

    Boston, Massachusetts, 02215

    Rachel Freedman, MD, 617-632-3000, Rachel_Freedman@dfci.harvard.edu

    Rachel Freedman, MD

    Recruiting
  • City of Hope Medical Center

    Duarte, California, 91010

    Thanh Nga Doan, 626-256-4673, tdoan@coh.org

    Thanh Nga Doan

    Recruiting
  • University of Rochester

    Rochester, New York, 14642

    Allison Magnuson, MD, 585-602-5085, allison_magnuson@urmc.rochester.edu

    MD

    Recruiting

Other trials in United States

About this study

Official title: Dose Reduction of Docetaxel-Based Chemotherapy in Vulnerable Older Women With Early-Stage Breast Cancer (DOROTHY)

This phase II trial tests how well dose-reduced docetaxel combined with cyclophosphamide works in treating older women with early stage (stage I-III) HER2 negative breast cancer vulnerable to toxicity. Chemotherapy drugs, such as docetaxel and cyclophosphamide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Docetaxel and cyclophosphamide are commonly used, but is not well tolerated at the standard dose and can affect the way older patients feel physically and emotionally. Giving dose-reduced docetaxel combined with cyclophosphamide may be an effective treatment option and improve quality of life in vulnerable older women with stage I-III HER2 negative breast cancer.

Read the detailed description

PRIMARY OBJECTIVE:

  1. Compare the relative dose intensity (RDI) of reduced- versus (vs.) standard-dose docetaxel dosing strategies.

SECONDARY OBJECTIVE:

  1. Compare treatment tolerability of reduced- vs. standard-dose docetaxel dosing strategies.

OUTLINE: Patients are randomized to 1 of 2 arms.

ARM I: Patients receive dose-reduced docetaxel intravenously (IV) over 60 minutes and cyclophosphamide IV over 30 minutes on day 1 of each cycle. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity.

ARM II: Patients receive standard dose docetaxel IV over 60 minutes and cyclophosphamide IV over 30 minutes on day 1 of each cycle. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up at 30 days then at least twice yearly for 2 years.

Being tested
Cyclophosphamide, Docetaxel, Medical Chart Review, Questionnaire Administration

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • CyclophosphamideDrug

    Also called (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Carloxan, Ciclofosfamida

    Given IV

  • DocetaxelDrug

    Also called Docecad, RP56976, Taxotere, Taxotere Injection Concentrate

    Given IV

  • Medical Chart ReviewOther

    Also called Chart Review

    Ancillary studies

  • Questionnaire AdministrationOther

    Ancillary studies

Study groups in NCT06042569
Study groupRoleWhat they receive
Arm I: (Dose-reduced docetaxel, cyclophosphamide)ExperimentalPatients receive dose-reduced docetaxel IV over 60 minutes and cyclophosphamide IV over 30 minutes on day 1 of each cycle. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity.
Receives: Drug: Cyclophosphamide; Drug: Docetaxel; Other: Medical Chart Review; Other: Questionnaire Administration
Arm II: (Standard dose docetaxel, cyclophosphamide)Active comparatorPatients receive standard dose docetaxel IV over 60 minutes and cyclophosphamide IV over 30 minutes on day 1 of each cycle. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity.
Receives: Drug: Cyclophosphamide; Drug: Docetaxel; Other: Medical Chart Review; Other: Questionnaire Administration

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Relative dose intensity (RDI)

    RDI is defined as the ratio of actual dose intensity received to the standard dose intensity, ranging from 0 to 100%. The RDI between the two arms will be compared using T-test, RDI difference and 90% confidence interval. A one-sided p-value < 0.05 will be considered statistically significant.

    Measured: At completion of 4 cycles, up to 12 weeks (each cycle is every three weeks)

Secondary outcomes (11)
  1. Treatment success

    Treatment success is defined as the proportion of patients who receive all 4 planned cycles of chemotherapy without unacceptable toxicity (grade 3-4), hospitalization/death at the end of treatment, and without decline in physical function status. Proportion of treatment success between the 2 arms will be compared using Chi-square test. A one-sided p-value of < 0.05 will be considered statistically significant.

    Measured: At completion of 4 cycles, up to 12 weeks (Each cycle is three weeks)

  2. Patient-reported symptomatic toxicities

    Toxicities will be described using the National Cancer Institute (NCI) Patient Reported Outcomes Common Terminology Criteria for Adverse Events (PRO-CTCAE). Patient reported outcomes will evaluate how well symptoms reported correlate/agree with clinician reported adverse events.

    Measured: At each chemotherapy cycle for 4 cycles, end of treatment and at 3, 6, 12 and 24 months after treatment ends)(Each cycle is three weeks).

  3. Differences in PRO-CTCAE and clinician-reported toxicities

    Treatment related toxicities grade 3 or higher experienced by patients between the 2 arms will be described using NCI-CTCAE version (v) 5.0. Chi-square or Fisher exact test will be used to explore the difference in terms of rate of PRO-CTCAE and clinician reported CTCAE between the 2 arms at the end of chemotherapy. Agreement proportions between PRO-CTCAE and clinician reported CTCAE will be explored and calculated for the 2 arms combined.

    Measured: At each chemotherapy cycle for 4 cycles and at 3, 6, 12, and 24 months after treatment ends (Each cycle is three weeks).

  4. Patient satisfaction

    Patient-reported satisfaction will be measured using the Was It Worth It questionnaire. Data will be scored and summarized according to their scoring manual. Chi-square or Fisher exact test will be used to compare the proportion of patients who consider it worthwhile to undergo treatment, the proportion of patients who would undergo the treatment again, and the proportionof patients who would recommend the treatment to others between the 2 arms.

    Measured: Up to 3 months after treatment ends

  5. Changes in function and health status

    Elements of the Geriatric Assessment (GA) will be used to calculate the deficit accumulation index for each patient on each study arm over time. Trajectories of change in function will be examined. Data will be scored and summarized according to the GA scoring manual.

    Measured: At baseline and at 3, 6, 12 and 24 months after treatment ends

  6. Incidence of adverse events

    Toxicity experienced by patients for each arm at each cycle will be described using NCI CTCAE v 5.0. Hematologic and non-hematologic toxicities will be examined by grade, type and offending agent.

    Measured: At every 3 weeks up to completion of study treatment

  7. Invasive disease-free survival

    Defined as an occurrence of ipsilateral invasive breast cancer recurrence, regional invasive breast cancer recurrence, distant recurrence, death attributable to any cause, contralateral invasive breast cancer and second non-breast invasive cancer.

    Measured: Up to 2 years

  8. Local recurrences

    Local recurrence will be defined as the number of in-breast, chest wall after mastectomy and axillary recurrences.

    Measured: Up to 3 years

  9. Distant recurrences

    Distant recurrence will be defined as the number of recurrences occurring with or without localized recurrence that have occurred distant to the breast.

    Measured: Up to 2 years

  10. Overall survival

    Breast cancer-specific survival and cause of death will also be examined.

    Measured: From registration to death due to any cause up to 24 months

  11. Progression-free survival

    The length of time during and after the treatment of a disease, such as cancer, that a patient lives with the disease but it does not get worse. In a clinical trial, measuring the progression-free survival is one way to see how well a new treatment works.

    Measured: From registration to the earliest of progression or death due to any cause up to 24 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Sep 2023
  2. Study start16 Sep 2024
  3. Primary completion20 Sep 2031 (estimated)
  4. Study completion20 Sep 2031 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
174 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06042569
Sponsor's protocol ID
21374
Other IDs
NCI-2023-06506, 21374, P30CA033572
Status last verified
Nov 2026
First submitted
7 Sep 2023
Last updated
4 Nov 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Cyclophosphamide, Docetaxel and Medical Chart Review in people with Anatomic Stage I Breast Cancer AJCC v8 and Anatomic Stage II Breast Cancer AJCC v8, run by City of Hope Medical Center at 3 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 11 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 4 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Thanh Nga Doan, MD (626-321-1845, tdoan@coh.org), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Relative dose intensity (RDI) (time frame: At completion of 4 cycles, up to 12 weeks (each cycle is every three weeks)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Nov 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in