ClinicalTrials.gg
RecruitingNCT07678957Updated Sep 14, 2026

A Study Comparing BL-M07D1 With DS-8201 in Patients With HR-Positive, HER2-Low Expressing Recurrent/Metastatic Breast Cancer

A Phase 2 interventional study of BL-M07D1 and DS-8201 in Breast Cancer, sponsored by Sichuan Baili Pharmaceutical Co., Ltd.. Recruiting at 1 site in China. Open to female participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-09-14.

Sponsored by Sichuan Baili Pharmaceutical Co., Ltd. (part of Sichuan Biokin Pharmaceutical Co., Ltd.) · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Aug 2026; still recruiting 2 months later.

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Phase
Phase 2
Study type
Interventional
Enrollment
120
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
Female
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 22 studies in Breast Neoplasms by Sichuan Biokin Pharmaceutical Co., Ltd. — 15 open to participants now, 20 under way, 7 of them phase 3. Breast Neoplasms · Sichuan Biokin Pharmaceutical Co., Ltd..

Planned enrollment
10th of 22
120 · median 83
Started
2026
with 3 others
Phase 2
3 of 22
2 open now
Primary completion
2028-12
later than 13 of 19 live
Registered
21st of 22
by date

Among the 22 studies in Breast Neoplasms by Sichuan Biokin Pharmaceutical Co., Ltd., this one is the 10th largest by planned enrollment, is one of 4 that started in 2026, is one of 3 in phase 2, reaches primary completion later than 13 of the 19 other live ones, and was the 21st registered.

Breast Neoplasms

14,832 studies on the registry are indexed under Breast Neoplasms; 3,320 are open to participants now.

Browse Breast Neoplasms studies →

Open to participants now

15 of the 22 studies in Breast Neoplasms by Sichuan Biokin Pharmaceutical Co., Ltd. are open now, in 2 countries. Recruiting first, the newest first:

9 more — sign in →

By country, each count listing its studies:

All 15 open studies →

Where they have run

Who these studies take

Of the 2,399 Breast Neoplasms studies recruiting now, 1,570 (65%) set no upper age limit and 592 (25%) stop at 75 or younger; 103 take children under 18; 215 take healthy volunteers.

This study: 18 Years to 75 Years · female · no healthy volunteers.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 22 studies in Breast Neoplasms by Sichuan Biokin Pharmaceutical Co., Ltd., or all of them as a file.
02

Study summary

This trial is a randomized, open-label, multicenter Phase II study designed to evaluate the efficacy and safety of BL-M07D1 in patients with unresectable locally recurrent or metastatic HR-positive, HER2-low expressing breast cancer.

Read the detailed description

In this trial, the treatment group receives BL-M07D1, and the control group receives DS-8201.

03

Conditions studied

  • Breast Cancer

Browse trials for

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Voluntarily sign the form and agree to comply with the protocol requirements;
  2. Female patients aged ≥18 years and ≤75 years at the time of signing the informed consent form;
  3. ≥12 weeks;
  4. Locally recurrent or breast cancer that is hormone receptor (HR)-positive and -low expressing;
  5. Provide adequate and recent tumor tissue specimens for central laboratory testing of HER2, HR, and other biomarkers as required;
  6. Meet the prior treatment requirements as specified in the protocol;
  7. Have at least one measurable target lesion per v1.1 criteria;
  8. (ECOG) performance status of 0 or 1;
  9. Toxicities from prior antitumor therapy have recovered to ≤Grade 1 per v6.0;
  10. Adequate organ function as defined in the protocol;
  11. For premenopausal women of , a serum pregnancy test must be performed within 7 days prior to the start of treatment and must be negative; patients must not be breastfeeding. All enrolled patients (both male and female) must use adequate and highly effective measures throughout the entire treatment period and for 7 months after the last dose of study treatment.

Exclusion criteria

Exclusion Criteria:

  1. Received surgery, curative radiotherapy, immunotherapy, or other systemic anti-tumor therapies within 4 weeks prior to the first dose;
  2. Intolerance to the control drug or presence of other to the control drug;
  3. Prior treatment with anti- therapy;
  4. Prior treatment with an ADC (antibody-drug conjugate) using a camptothecin derivative as the payload;
  5. History of severe cardiovascular or cerebrovascular disease within 6 months prior to screening;
  6. Concurrent pulmonary disease resulting in severely impaired lung function;
  7. History of ILD/interstitial lung disease requiring therapy, etc.;
  8. prolongation, complete left bundle branch block, third-degree atrioventricular block, or frequent and uncontrolled arrhythmias;
  9. Diagnosis of another primary within 5 years prior to the first dose;
  10. Uncontrolled hypertension;
  11. Active central nervous system (CNS) ;
  12. History of severe allergic reactions to any or component of the drug;
  13. History of or allogeneic stem cell transplantation or organ transplantation;
  14. Prior anthracycline treatment with a cumulative equivalent dose of doxorubicin > 360 mg/m²;
  15. Positive for (HIV) antibody, active virus (HBV) infection, liver cirrhosis, or virus (HCV) infection;
  16. Occurrence of severe infection within 4 weeks prior to the first dose of the investigational drug;
  17. Presence of large-volume serous cavity effusion, or serous cavity effusion with significant symptoms;
  18. Presence of lymphangitic carcinomatosis;
  19. Receiving systemic corticosteroid therapy at a dose of > 10 mg/day prednisone or equivalent prior to randomization;
  20. Presence of severe neurological or psychiatric disorders;
  21. bleeding or obvious bleeding tendency within 4 weeks prior to signing ;
  22. Intestinal obstruction, Crohn's disease, ulcerative colitis, or chronic diarrhea, etc.;
  23. Planned vaccination or receipt of within 28 days prior to the first dose;
  24. Presence of other severe physical conditions, laboratory abnormalities, or poor compliance, which may increase the risk of participating in the study, interfere with the study results, or render the patient unsuitable for enrollment as judged by the investigator.
Terms in these criteria, in plain language(21)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
120 participants (estimated)

Study arms

  • Experimental
    BL-M07D1

    Participants receive BL-M07D1 in the first cycle (3 weeks). Participants with clinical benefit could receive additional treatment for more cycles. The administration will be terminated because of disease progression or intolerable toxicity occurring or other reasons.

    Drug: BL-M07D1

  • Active comparator
    DS-8201

    Participants receive DS-8201 in the first cycle (3 weeks). Participants with clinical benefit could receive additional treatment for more cycles. The administration will be terminated because of disease progression or intolerable toxicity occurring or other reasons.

    Drug: DS-8201

Interventions

  • Administration by intravenous infusion for a cycle of 3 weeks.

  • Administration by intravenous infusion for a cycle of 3 weeks.

06

What researchers measure

Primary outcomes

  1. Progression-free survival (PFS)

    Progression-free survival (PFS) as assessed by BICR is defined as the time between the date subjects were randomized and the first observation of disease progression (based on BICR's image-based assessment) or death.

    Time frame: Up to approximately 24 months

Secondary outcomes

  1. Overall survival (OS)

    Overall survival (OS) is defined as the time between the subject's randomization date and subject's death.

    Time frame: Up to approximately 24 months

  2. Objective Response Rate (ORR)

    Objective response rate (ORR) is defined as the number of CR and PR in the treatment and control groups divided by the number of that group in the full analysis set (FAS).

    Time frame: Up to approximately 24 months

  3. Duration of Response (DOR)

    Duration of Response (DOR) : defined as the period from the date when tumor response is first recorded to the date when objective tumor progression is first recorded or the date of death.

    Time frame: Up to approximately 24 months

  4. Clinical Benefit Rate(CBR)

    Clinical Benefit Rate (CBR): The proportion of subjects who were randomized and received at least one dose of the study drug, and whose best overall response (BOR) according to RECIST v1.1 criteria was complete response (CR), partial response (PR), or stable disease (SD) lasting no less than 24 weeks.

    Time frame: Up to approximately 24 months

  5. Disease Control Rate (DCR)

    Disease Control Rate (DCR) : Percentage of all randomized subjects who rated the best overall response (BOR) as complete response (CR), partial response (PR), and disease stabilization (SD) according to RECIST 1.1 criteria.

    Time frame: Up to approximately 24 months

  6. Treatment Emergent Adverse Event (TEAE)

    TEAE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally emerging, or any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a pre-existing condition during the treatment of BL-M07D1. The type, frequency and severity of TEAE will be evaluated during the treatment of BL-M07D1.

    Time frame: Up to approximately 24 months

  7. Anti-drug antibody (ADA)

    Frequency of anti-BL-M07D1 antibody (ADA) will be investigated.

    Time frame: Up to approximately 24 months

07

Study locations

1 of 1 sites recruiting
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Aug 2026 (actual). Primary completion is estimated for Dec 2028, 28 months after the start.

Of 232 industry-sponsored phase 2 interventional studies under Breast Neoplasms, half reached primary completion within 34 months of starting (the median), counting those still running; a quarter within 22 and three quarters within 53. This study's planned 28 months is below that.

Counting every sponsor, half of 1,302 studies reached it within 51 months; a quarter within 30 and three quarters within 82.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 25, 2026
First posted
Jul 1, 2026
StartActual
Aug 31, 2026
Primary completionEst.
Dec 2028
CompletionEst.
Dec 2028
Last update
Sep 14, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 14, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT07678957
Collaborators
Baili-Bio (Chengdu) Pharmaceutical Co., Ltd.
Responsible party
Sponsor
First posted
Jul 1, 2026
Start date
Aug 31, 2026
Primary completion
Dec 2028 (estimated)
Completion
Dec 2028 (estimated)
Last update
Sep 14, 2026

Study contacts

Sa Xiao, PHD
Contact
xiaosa@baili-pharm.com
15013238943

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

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Studies of the drug tested here: Anti-HER2 Antibody-drug Conjugate BL-M07D1

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