CholangiocarcinomaPhase 1/2DUET-BTCNCT07641036
Dual-Target HER2/CEA CAR-NK Cells in Advanced Biliary Tract Cancer
A Phase 1/2 study testing EB-HC01 dual-target CARNK cells, Fludarabine and Cyclophosphamide in people with Cholangiocarcinoma and Intrahepatic Cholangiocarcinoma, run by Beijing Biotech at 1 site in China.
Trial summary
This example phase 1/2, open-label, biomarker-selected study evaluates EB-HC01, an allogeneic dual-target CARNK product composed of a 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells, in adults with unresectable or metastatic cholangiocarcinoma or other biliary tract cancers after standard therapy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Cholangiocarcinoma, Intrahepatic Cholangiocarcinoma, Extrahepatic Cholangiocarcinoma
- What is being tested?
- EB-HC01 dual-target CARNK cells, Fludarabine and Cyclophosphamide
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 30 participants
- Where
- 1 siteChina
- Study dates
- 2 Mar 2026to 17 Oct 2028
- Phase
- Phase 1/2
- 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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Histologically or cytologically confirmed unresectable, recurrent, or metastatic intrahepatic cholangiocarcinoma, extrahepatic cholangiocarcinoma, or gallbladder carcinoma.
- Disease progression after at least 1 prior gemcitabine/platinum-containing regimen in the advanced setting; prior durvalumab and prior HER2-targeted therapy are allowed.
- Central biomarker confirmation of HER2 positivity (IHC 3+ or IHC 2+/ISH+ or ERBB2 amplification) and CEACAM5/CEA positivity (membranous expression in >=20% of viable tumor cells by IHC).
- At least 1 measurable lesion according to RECIST 1.1.
- ECOG performance status 0-1.
- Adequate marrow, renal, hepatic, and cardiac function as defined by the protocol.
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- Resolved biliary obstruction or stable internal/external drainage for >=7 days before lymphodepletion, with no active cholangitis.
- Life expectancy >=12 weeks.
- Willingness to provide archival or fresh tumor tissue and serial blood samples for central biomarker testing and correlative studies.
- Agreement to use protocol-specified contraception
Who cannot join
- Prior HER2-directed or CEA-directed gene-modified cell therapy.
- Untreated or unstable CNS metastases or leptomeningeal disease.
- Active uncontrolled infection, including uncontrolled cholangitis, sepsis, or clinically significant uncontrolled hepatitis or HIV infection.
- Ongoing systemic immunosuppression greater than 10 mg/day prednisone equivalent within 7 days before lymphodepletion.
- Clinically significant interstitial lung disease, uncontrolled heart failure, unstable arrhythmia, or recent myocardial infarction.
- Child-Pugh B or C liver disease, hepatic encephalopathy, or clinically significant refractory ascites.
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- Prior allogeneic solid organ transplant or allogeneic stemcell transplant.
- Active autoimmune disease requiring systemic therapy within the previous 2 years.
- Pregnancy or breastfeeding.
- Any condition that, in the investigator's judgment, would make lymphodepletion or EB-HC01 infusion unsafe or would interfere with protocol compliance.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site, 1 recruiting
- Recruiting
Peking University Shenzhen Hospital
Shenzhen, Guangdong, 518036
Zhen J Peng, Phd, +86 13076790039, Zhen-Peng@beijing-biotech.com
About this study
Official title: A Phase 1/2, Open-Label, Biomarker-Selected Study of Allogeneic Dual-Target HER2/CEACAM5 Chimeric Antigen Receptor Natural Killer Cells (EB-HC01) in Participants With Unresectable or Metastatic Cholangiocarcinoma and Other Biliary Tract Cancers
This example phase 1/2, open-label, biomarker-selected study evaluates EB-HC01, an allogeneic dual-target CARNK product composed of a 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells, in adults with unresectable or metastatic cholangiocarcinoma or other biliary tract cancers after standard therapy. Part A determines safety, dose-limiting toxicities (DLTs), and the recommended phase 2 dose (RP2D) after reduced-intensity lymphodepletion. Part B evaluates preliminary anti-tumor activity, CAR-NK persistence, and biomarker-response associations.
Read the detailed description
Biliary tract cancers remain highly lethal after progression on gemcitabine/platinum-based therapy, and only a biomarker-defined minority have actionable cell-surface targets.
HER2 has the strongest clinical validation among the antigens under consideration, including active HER2-targeted drug development and prior HER2 CAR-T experience in advanced BTC. CEACAM5 is retained as a complementary second target because it may reduce antigen escape and improve coverage of heterogeneous disease; however, it is treated conservatively because prior CEA-directed cell therapy has shown gastrointestinal and pulmonary toxicity in other solid tumors. EpCAM is not used for enrollment in this example because physiologic expression in the biliary tree may narrow the safety window for a first systemic study. EB-HC01 is designed as an off-the-shelf cord bloodderived NK-cell product manufactured as a fixed 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells.
After fludarabine/cyclophosphamide lymphodepletion, participants receive intravenous EB-HC01 on Days 0 and 7 of a 28-day cycle. In Part A, a standard 3+3 doseescalation design evaluates 3 flat-dose levels to identify the RP2D. In Part B, an expansion cohort at RP2D better defines safety and preliminary activity in biomarkerconfirmed dual-positive BTC.
Key correlative studies include central HER2 and CEACAM5 testing, ctDNA analysis, serum CA19-9 and CEA,and serial blood assessments of CAR-NK persistence and cytokine kinetics. EpCAM testing is retained as an exploratory biomarker to inform future protocol amendments but is not used to determine eligibility.
- Conditions
- Cholangiocarcinoma, Intrahepatic Cholangiocarcinoma, Extrahepatic Cholangiocarcinoma, Gallbladder Carcinoma, Biliary Tract Cancer
- Being tested
- EB-HC01 dual-target CARNK cells, Fludarabine, Cyclophosphamide
- Keywords
- CAR-NK, dual-target cell therapy, HER2, ERBB2, CEA, CEACAM5, cholangiocarcinoma, biliary tract cancer, allogeneic, off-the-shelf, adoptive cell therapy
- Medical subject headings
- Cholangiocarcinoma, Gallbladder Neoplasms, Biliary Tract Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
EB-HC01 dual-target CARNK cellsBiological
EB-HC01 dual-target CARNK cells
FludarabineDrug
Fludarabine
CyclophosphamideDrug
Cyclophosphamide
| Study group | Role | What they receive |
|---|---|---|
| EB-HC01 after lymphodepletion | Experimental | Participants with biomarker-confirmed HER2/CEACAM5-positive advanced biliary tract cancer receive fludarabine plus cyclophosphamide on Days -5 to -3, followed by EB-HC01 intravenously on Days 0 and 7 of each 28-day cycle. Up to 2 cycles are permitted during doseescalation and up to 4 cycles are allowed in expansion in the absence of progression or prohibitive toxicity. Receives: Biological: EB-HC01 dual-target CARNK cells; Drug: Fludarabine; Drug: Cyclophosphamide |
What is being measured
The primary outcome is the main question the study is designed to answer.
Dose-Limiting Toxicities
Measured: 28 Days
Treatment-Emergent Adverse Events
Measured: 12 months
Secondary outcomes (5)
Objective Response Rate
Measured: 12 months
Disease Control Rate
Measured: 12 months
Duration of Response
Measured: 24 months
Progression-Free Survival
Measured: 24 months
Overall Survival
Measured: 24 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Jun 2026
- Study start2 Mar 2026
- Primary completion14 Mar 2027 (estimated)
- Study completion17 Oct 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for CholangiocarcinomaStudies of the same condition, open and under way.
- More trials run by Beijing BiotechThe 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
- Interventional
- Phase
- Phase 1/2
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Model description
- Two-part, open-label, single-group study. Part A uses a 3+3 dose-escalation design across 3 flat-dose levels (1 x10\^8, 3 x 10\^8, and 1 x 10\^9 total CAR-NK cells per infusion, delivered as a 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells). All participants receive lymphodepletion on Days -5 to -3 and EB-HC01 on Days 0 and 7 of each 28-day cycle. Part B is an expansion cohort at RP2D to better define safety and preliminary efficacy.
- Masking
- None (open label)
- Enrolment
- 30 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Beijing Biotech
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07641036
- Sponsor's protocol ID
- ESBI2026-306
- Acronym
- DUET-BTC
- Status last verified
- Jun 2026
- First submitted
- 6 Jun 2026
- Last updated
- 11 Jun 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 11 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1/2, Open-Label, Biomarker-Selected Study of Allogeneic Dual-Target HER2/CEACAM5 Chimeric Antigen Receptor Natural Killer Cells (EB-HC01) in Participants With Unresectable or Metastatic Cholangiocarcinoma and Other Biliary Tract Cancers
- ClinicalTrials.gov ID
- NCT07641036
- Acronym / sponsor ID
- DUET-BTC / ESBI2026-306
- Conditions
- Cholangiocarcinoma, Intrahepatic Cholangiocarcinoma, Extrahepatic Cholangiocarcinoma, Gallbladder Carcinoma, Biliary Tract Cancer
- Keywords
- CAR-NK, dual-target cell therapy, HER2, ERBB2, CEA, CEACAM5, cholangiocarcinoma, biliary tract cancer
- Phase
- Phase 1/2
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 30 participants (estimated)
- Lead sponsor
- Beijing BiotechIndustry (pharma, biotech, devices)
- Study start
- 2 Mar 2026 (actual)
- Primary completion
- 14 Mar 2027 (estimated)
- Study completion
- 17 Oct 2028 (estimated)
- First posted
- 11 Jun 2026 (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.
This example phase 1/2, open-label, biomarker-selected study evaluates EB-HC01, an allogeneic dual-target CARNK product composed of a 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells, in adults with unresectable or metastatic cholangiocarcinoma or other biliary tract cancers after standard therapy. Part A determines safety, dose-limiting toxicities (DLTs), and the recommended phase 2 dose (RP2D) after reduced-intensity lymphodepletion. Part B evaluates preliminary anti-tumor activity, CAR-NK persistence, and biomarker-response associations.
Detailed description
Biliary tract cancers remain highly lethal after progression on gemcitabine/platinum-based therapy, and only a biomarker-defined minority have actionable cell-surface targets.
HER2 has the strongest clinical validation among the antigens under consideration, including active HER2-targeted drug development and prior HER2 CAR-T experience in advanced BTC. CEACAM5 is retained as a complementary second target because it may reduce antigen escape and improve coverage of heterogeneous disease; however, it is treated conservatively because prior CEA-directed cell therapy has shown gastrointestinal and pulmonary toxicity in other solid tumors. EpCAM is not used for enrollment in this example because physiologic expression in the biliary tree may narrow the safety window for a first systemic study. EB-HC01 is designed as an off-the-shelf cord bloodderived NK-cell product manufactured as a fixed 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells.
After fludarabine/cyclophosphamide lymphodepletion, participants receive intravenous EB-HC01 on Days 0 and 7 of a 28-day cycle. In Part A, a standard 3+3 doseescalation design evaluates 3 flat-dose levels to identify the RP2D. In Part B, an expansion cohort at RP2D better defines safety and preliminary activity in biomarkerconfirmed dual-positive BTC.
Key correlative studies include central HER2 and CEACAM5 testing, ctDNA analysis, serum CA19-9 and CEA,and serial blood assessments of CAR-NK persistence and cytokine kinetics. EpCAM testing is retained as an exploratory biomarker to inform future protocol amendments but is not used to determine eligibility.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Two-part, open-label, single-group study. Part A uses a 3+3 dose-escalation design across 3 flat-dose levels (1 x10^8, 3 x 10^8, and 1 x 10^9 total CAR-NK cells per infusion, delivered as a 1:1 mixture of HER2-CAR-NK and CEACAM5-CAR-NK cells). All participants receive lymphodepletion on Days -5 to -3 and EB-HC01 on Days 0 and 7 of each 28-day cycle. Part B is an expansion cohort at RP2D to better define safety and preliminary efficacy.
| Arm | Type | Receives |
|---|---|---|
| EB-HC01 after lymphodepletion | Experimental | Biological: EB-HC01 dual-target CARNK cells, Drug: Fludarabine, Drug: CyclophosphamideParticipants with biomarker-confirmed HER2/CEACAM5-positive advanced biliary tract cancer receive fludarabine plus cyclophosphamide on Days -5 to -3, followed by EB-HC01 intravenously on Days 0 and 7 of each 28-day cycle. Up to 2 cycles are permitted during doseescalation and up to 4 cycles are allowed in expansion in the absence of progression or prohibitive toxicity. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (10 listed)
- Histologically or cytologically confirmed unresectable, recurrent, or metastatic intrahepatic cholangiocarcinoma, extrahepatic cholangiocarcinoma, or gallbladder carcinoma.
- Disease progression after at least 1 prior gemcitabine/platinum-containing regimen in the advanced setting; prior durvalumab and prior HER2-targeted therapy are allowed.
- Central biomarker confirmation of HER2 positivity (IHC 3+ or IHC 2+/ISH+ or ERBB2 amplification) and CEACAM5/CEA positivity (membranous expression in >=20% of viable tumor cells by IHC).
- At least 1 measurable lesion according to RECIST 1.1.
- ECOG performance status 0-1.
Key exclusion criteria (10 listed)
- Prior HER2-directed or CEA-directed gene-modified cell therapy.
- Untreated or unstable CNS metastases or leptomeningeal disease.
- Active uncontrolled infection, including uncontrolled cholangitis, sepsis, or clinically significant uncontrolled hepatitis or HIV infection.
- Ongoing systemic immunosuppression greater than 10 mg/day prednisone equivalent within 7 days before lymphodepletion.
- Clinically significant interstitial lung disease, uncontrolled heart failure, unstable arrhythmia, or recent myocardial infarction.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| EB-HC01 dual-target CARNK cellsEB-HC01 dual-target CARNK cells | Biological | EB-HC01 after lymphodepletion |
| FludarabineFludarabine | Drug | EB-HC01 after lymphodepletion |
| CyclophosphamideCyclophosphamide | Drug | EB-HC01 after lymphodepletion |
Primary outcome
Dose-Limiting Toxicities
Time frame: 28 Days
Treatment-Emergent Adverse Events
Time frame: 12 months
5 secondary outcomes
Objective Response Rate
Time frame: 12 months
Disease Control Rate
Time frame: 12 months
Duration of Response
Time frame: 24 months
Progression-Free Survival
Time frame: 24 months
Overall Survival
Time frame: 24 months
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 11 Jun 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.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1/2 study testing EB-HC01 dual-target CARNK cells, Fludarabine and Cyclophosphamide in people with Cholangiocarcinoma and Intrahepatic Cholangiocarcinoma, run by Beijing Biotech 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 10 inclusion and 10 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 11 Jun 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.
What does this combined phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
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 Seni S Lu, Phd (+86 13076790030, Seni-Lu@beijing-biotech.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Dose-Limiting Toxicities (time frame: 28 Days). The study lists 2 primary outcomes in all. 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 11 Jun 2026.