Breast Cancer MetastaticEXPLORENCT06945224
A ReaL World Study of DS-8201
An observational study of Breast Cancer Metastatic and Treatment Efficacy, run by Fudan University at 1 site in China.
Trial summary
A ReaL world study of DS-8201 Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Breast Cancer Metastatic, Treatment Efficacy
- How many people
- 300 participants
- Where
- 1 siteChina
- Study dates
- 19 Apr 2025to Nov 2026
- Phase
- Observational
- 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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: breast cancer patients who received DS-8201 in the advanced stage
Who may be able to join
- Male or female aged 18 or above;
- The Eastern Cooperative Oncology Group (ECOG) physical condition score of the United States is ≤2;
- HER2 positive (IHC 3+ or IHC 2+ and ISH+) confirmed by tumor histology or cytology, and having received one or more anti-HER2 drug treatments previously; Or low expression of HER2 confirmed by tumor histology or cytology (IHC 1+ or IHC 2+ and ISH-), and having received at least one systemic treatment in the metastatic disease stage previously, or unresectable or metastatic breast cancer that relapsed during adjuvant chemotherapy or within 6 months after the completion of adjuvant chemotherapy;
- Receive goldtrastuzumab treatment in the advanced stage;
- During the study period, voluntarily abide by this trial protocol and receive regular follow-ups;
- All women of childbearing age, fertile men or their spouses who have no plans for fertility or sperm donation throughout the trial period until 6 months after the last dose, or who voluntarily take effective contraceptive measures.
Who cannot join
- Pregnant or lactating women;
- Those with acute or chronic infections, or those with other serious diseases at the same time, are judged by the researchers as unsuitable for this study;
- Having suffered from other malignant tumors within 5 years (excluding the following situations: cured basal cell carcinoma of the skin, carcinoma in situ of the cervix, and papillary thyroid carcinoma; A second primary cancer that has been completely cured and has no recurrence within five years; Researchers have clearly identified which primary tumor source the metastatic foci belong to.
- Those with mental illness or mental disorders, poor compliance and inability to cooperate and describe treatment responses;
- Those with severe organic diseases or major organ failure, such as decompensated heart, lung, liver or kidney failure, which makes them unable to tolerate treatment;
- Patients allergic to trastuzumab;
- Patients who changed their treatment regimens after trastuzumab treatment due to reasons other than disease progression or intolerable adverse reactions;
- The researcher believes that the patient has other circumstances that make them unsuitable for participating in this study
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Trastuzumab-deruxtecan In Metastatic Breast Cancer Patients: A ReaL World Study of Chinese Population
A ReaL world study of DS-8201
- Conditions
- Breast Cancer Metastatic, Treatment Efficacy
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Patients received DS-8201 | HER2-positive and HER2-low breast cancer patients who received DS-8201 in the advanced stage |
What is being measured
The primary outcome is the main question the study is designed to answer.
PFS
PFS was defined as the time interval from the date of DS-8201 initiation until date of progressive disease (PD) or death from any causes, whichever occurred first.
Measured: Six months after the last patient was enrolled
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Apr 2025
- Study start19 Apr 2025
- Primary completion1 Apr 2026
- Study completionNov 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Breast Cancer MetastaticStudies of the same condition, open and under way.
- More trials run by Fudan UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Retrospective
- Enrolment
- 300 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Fudan University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Jian Zhang,MD, Fudan University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06945224
- Sponsor's protocol ID
- EXPLORE
- Acronym
- EXPLORE
- Status last verified
- Oct 2026
- First submitted
- 18 Apr 2025
- Last updated
- 3 Nov 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 3 Nov 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Trastuzumab-deruxtecan In Metastatic Breast Cancer Patients: A ReaL World Study of Chinese Population
- ClinicalTrials.gov ID
- NCT06945224
- Acronym / sponsor ID
- EXPLORE / EXPLORE
- Conditions
- Breast Cancer Metastatic, Treatment Efficacy
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 300 participants (estimated)
- Lead sponsor
- Fudan UniversityUniversity, hospital or other
- Study start
- 19 Apr 2025 (actual)
- Primary completion
- 1 Apr 2026 (actual)
- Study completion
- Nov 2026 (estimated)
- First posted
- 25 Apr 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
A ReaL world study of DS-8201
Study design
- Observational model
- Other
- Time perspective
- Retrospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Patients received DS-8201 | – | –HER2-positive and HER2-low breast cancer patients who received DS-8201 in the advanced stage |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- breast cancer patients who received DS-8201 in the advanced stage
Key inclusion criteria (6 listed)
- Male or female aged 18 or above;
- The Eastern Cooperative Oncology Group (ECOG) physical condition score of the United States is ≤2;
- HER2 positive (IHC 3+ or IHC 2+ and ISH+) confirmed by tumor histology or cytology, and having received one or more anti-HER2 drug treatments previously; Or low expression of HER2 confirmed by tumor histology or cytology (IHC 1+ or IHC 2+ and ISH-), and having received at least one systemic treatment in the metastatic disease stage previously, or unresectable or metastatic breast cancer that relapsed during adjuvant chemotherapy or within 6 months after the completion of adjuvant chemotherapy;
- Receive goldtrastuzumab treatment in the advanced stage;
- During the study period, voluntarily abide by this trial protocol and receive regular follow-ups;
Key exclusion criteria (8 listed)
- Pregnant or lactating women;
- Those with acute or chronic infections, or those with other serious diseases at the same time, are judged by the researchers as unsuitable for this study;
- Having suffered from other malignant tumors within 5 years (excluding the following situations: cured basal cell carcinoma of the skin, carcinoma in situ of the cervix, and papillary thyroid carcinoma; A second primary cancer that has been completely cured and has no recurrence within five years; Researchers have clearly identified which primary tumor source the metastatic foci belong to.
- Those with mental illness or mental disorders, poor compliance and inability to cooperate and describe treatment responses;
- Those with severe organic diseases or major organ failure, such as decompensated heart, lung, liver or kidney failure, which makes them unable to tolerate treatment;
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
PFS
Time frame: Six months after the last patient was enrolled
PFS was defined as the time interval from the date of DS-8201 initiation until date of progressive disease (PD) or death from any causes, whichever occurred first.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Nov 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Breast Cancer Metastatic and Treatment Efficacy, run by Fudan University at 1 site in China.
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 6 inclusion and 8 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: under way, not looking for participants, as of the sponsor's last update on 3 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 1 site in China. 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.
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?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
PFS (time frame: Six months after the last patient was enrolled). 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 3 Nov 2026; AzTrials last refreshed its copy on 6 Nov 2026.