ClinicalTrials.gg
RecruitingNCT07529808Updated Oct 20, 2026

Phase 1/2 Study of BHB810 in Advanced Gastric and GEJ Adenocarcinoma

A Phase 1/2 interventional study of BHB810 in Gastric Cancer, Gastric Adenocarcinoma and Gastric (Stomach) Cancer, sponsored by BigHat Biosciences, Inc.. Recruiting at 3 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-20.

Sponsored by BigHat Biosciences, Inc. · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Started Jul 2026; still recruiting 3 months later.
Updated Oct 20, 2026Site recruiting status changed2 sites addedGo to Updates ↓

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Phase
Phase 1/2
Study type
Interventional
Enrollment
164
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

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

Among 804 studies in Stomach Neoplasms with a site in United States — 157 open to participants now, 239 under way, 12 of them phase 3. Stomach Neoplasms · United States.

Planned enrollment
148th of 686
164 · median 53
Started
2026
with 38 others
Phase 1/2
109 of 804
26 open now
Primary completion
2028-12
later than 178 of 238 live
Registered
780th of 804
by date

Among the 804 studies in Stomach Neoplasms with a site in United States, this one is the 148th largest by planned enrollment of the 686 interventional ones that give a count, is one of 39 that started in 2026, is one of 109 in phase 1/2, reaches primary completion later than 178 of the 238 other live ones, and was the 780th registered.

Stomach Neoplasms

3,401 studies on the registry are indexed under Stomach Neoplasms; 993 are open to participants now.

Browse Stomach Neoplasms studies →

Open to participants now

157 of the 804 studies in Stomach Neoplasms with a site in United States are open now. Recruiting first, the newest first:

151 more — sign in →

All 157 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 704 Stomach Neoplasms studies recruiting now, 376 (53%) set no upper age limit and 194 (28%) stop at 75 or younger; 28 take children under 18; 69 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

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02

Study summary

This study is looking at how safe BHB810 is in adults with gastric and gastroesophageal adenocarcinoma (GEJ). The purpose of this study is also to look at: how well the study drug works, how the study drug moves into, through, and out of the body, and how your body reacts to the study drug. Participants will get an IV infusion of BHB810 every 2 weeks while on study treatment.

03

Conditions studied

  • Gastric Cancer
  • Gastric Adenocarcinoma
  • Gastric (Stomach) Cancer
  • Gastroesophageal Adenocarcinoma
  • Gastroesophageal Cancer (GC)
  • Gastroesophageal Junction (GEJ) Adenocarcinoma
  • Gastroesophageal Junction (GEJ) Cancer
  • Gastrointestinal Cancer Metastatic
  • Gastrointestinal Adenocarcinoma
  • Gastrointestinal Cancers
  • Colorectal (Colon or Rectal) Cancer
  • Pancreatic Cancer
  • CDH17-positive Advanced Solid Tumors
  • Advanced Gastric Cancer

Keywords

  • Antibody Drug Conjugate (ADC)
  • Monomethyl Auristatin E (MMAE)
  • CDH17 protein
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
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

  • Participant must be ≥ 18 years or the legal age of consent in the jurisdiction in which the study is taking place at the time of signing the ICF.
  • confirmed advanced gastric or gastroesophageal junction (GEJ) adenocarcinoma that has progressed on, was nonresponsive to, or for which no standard or available curative therapy exists.

    • Participants in Phase 1 Backfill Cohorts \& Phase 2 must be CDH17-positive by central testing.
    • Other gastrointestinal (GI) tumor types may be enrolled in Backfill Cohorts and Phase 2.
  • At least 1 measurable target lesion at baseline per 1.1 (Response Evaluation Criteria in Solid Tumors)
  • Provision of FFPE . Additional fresh biopsies at screening are required in Phase 1 Backfill Cohorts and Phase 2.
  • Adequate organ and marrow function as defined in the protocol

Exclusion criteria

Exclusion Criteria:

  • Prior cancer treatment as follows, relative to the first planned dose of trial intervention:

    • Chemotherapy or targeted therapy withing 4 weeks or 5-halflives (whichever is shorter)
    • Monoclonal antibody-based therapy (including ADCs) within 4 weeks
    • within 4 weeks
    • Wide-field radiation therapy (>30% marrow-bearing bones) within 4 weeks or \< 2 weeks of focal palliative radiation to nontarget lesions
  • Prior treatment with a CDH17-directed therapy or an ADC with an auristatin (MMAE or MMAF)
  • Known or allergic reaction to BHB810 or it's
  • \<50% or history of congestive heart failure Class III/IV
  • > 470 msec, history of risk factors for Torsade de Pointes, or taking a medication known to prolong QT/QTc
  • Pregnant or breastfeeding females, or if you or your partner are planning to become pregnant
  • Known or suspected , , or spinal cord compression. Participants with stable, treated brain metastases may be enrolled.
  • Current treatment with a strong inhibitor or inducer, Pgp inhibitor, or CYP3A4 sensitive substrate within 2 weeks of first dose of trial intervention
  • Any condition that may compromise participant safety, compliance, or interfere with the evaluation of the study drug.
Terms in these criteria, in plain language(11)

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.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

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.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Excipients

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

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

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.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

CYP3A (CYP3A4) inhibitors and inducers

CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.

Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
164 participants (estimated)

Study arms

  • Experimental
    Dose Escalation and Backfill Cohorts

    Dose escalation and backfill cohorts

    Drug: BHB810

  • Experimental
    Recommended Phase 2 Dose Level 1 (RP2D1)

    Dose level 1 of 2 prospective recommended phase 2 dose levels

    Drug: BHB810

  • Experimental
    Recommended Phase 2 Dose Level 2 (RP2D2)

    Dose level 2 of 2 prospective recommended phase 2 dose levels

    Drug: BHB810

Interventions

  • DrugBHB810

    Every 2 weeks IV administration

06

What researchers measure

Primary outcomes

  1. Incidence of adverse events (AEs), serious adverse events (SAEs), and dose limiting toxicities (DLTs) per Common Terminology Criteria for Adverse Events v6.0 (CTCAE v6.0)

    Investigate the safety and tolerability of BHB810 by evaluation of AEs, SAEs, DLTs, and clinically significant changes safety assessments, like lab tests, vital signs, and other safety assessments Phase 1 (Dose Escalation \& Backfill Cohorts) and Phase 2 (Dose Optimization) DLTs apply to Phase 1 Dose Escalation Cohorts only.

    Time frame: Cycle 1 Day 1 through 30 days after the last dose, an average of 6 months

  2. Incidence of participants who have a dose modification of BHB810 due to toxicity

    Investigate the safety and tolerability of BHB810 by assessment of dose modifications due to toxicity Phase 1 (Dose Escalation \& Backfill Cohorts)

    Time frame: Cycle 1 Day 1 through 30 days after the last dose, an average of 6 months

  3. Overall Response Rate (ORR)

    Identify the recommended Phase 2 dose (RP2D) by comparing 2 doses of BHB810 by evaluating the ORR of participants according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 Phase 2 (Dose Optimization)

    Time frame: Screening through End of Treatment, an average of 6 months

Secondary outcomes

  1. Clinical Benefit Rate (CBR)

    Investigate preliminary antitumor activity of BHB810 as assessed by radiological response per RECIST v1.1 Number of participants who achieve stable disease (SD) for at least 6 months, or PR or CR for any duration Phase 1 (Dose Escalation \& Backfill Cohorts)

    Time frame: Screening through End of Treatment, an average of 6 months

  2. Duration of Response (DOR)

    Investigate preliminary antitumor activity of BHB810 as assessed by radiological response per RECIST v1.1 Time from PR or CR to disease progression Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: Screening through End of Treatment or last scan, an average of 6 months

  3. Progression Free Survival (PFS)

    Investigate preliminary antitumor activity of BHB810 as assessed by radiological response per RECIST v1.1 Time from first dose to first documented date of progression per RECIST v1.1 Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: Screening through End of Treatment, an average of 6 months

  4. Overall Survival (OS)

    Investigate preliminary antitumor activity of BHB810 Time from first dose to death from any cause Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: Screening through End of Study, an average of 10 months

  5. Pharmacokinetics: Area under the concentration-time curve (AUC)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  6. Pharmacokinetics: Area under the concentration-time curve from zero to the end of a dosing interval at steady-state (AUC0-tau)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  7. Pharmacokinetics: Maximum concentration of BHB810 (Cmax) Phase 1 (Dose Escalation & Backfill Cohorts) Phase 2 (Dose Optimization)

    To characterize the PK profile of BHB810 in blood samples

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  8. Pharmacokinetics: Time to reach maximum drug concentration of BHB810 (Tmax)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  9. Pharmacokinetics: Area under the concentration-time curve from zero to infinity (AUC0-inf)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  10. Pharmacokinetics: Terminal elimination half-life (t1/2)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  11. Pharmacokinetics: Volume of drug distribution during terminal phase (Vz)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  12. Pharmacokinetics: Total body clearance of the drug (CL)

    To characterize the PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  13. Pharmacokinetics: Area under the concentration-time curve from zero to last measurable concentration sample time (AUC0-last)

    To characterize the PK profile of BHB810 in blood samples Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

  14. Incidence of antidrug antibodies (ADAs) in blood before and after BHB810 administration

    To characterize the ADAs and PK profile of BHB810 in blood samples Phase 1 (Dose Escalation \& Backfill Cohorts) Phase 2 (Dose Optimization)

    Time frame: At protocol defined intervals starting at Cycle 1 Day 1 through End of Treatment, an average of 6 months

07

Study locations

2 of 3 sites recruiting
  • City of Hope Duarte
    Duarte, California 91010, United States
    Recruiting
    • Jalene Tangen · Contactjtangen@coh.org · 833-917-5715
    • Dani Castillo, MD · Principal investigator
  • University of California at Los Angeles
    Santa Monica, California 90404, United States
    Not yet recruiting
  • NEXT Virginia
    Fairfax, Virginia 22031, United States
    Recruiting
08

Timeline

3 registry updates 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 Jul 2026 (actual). Primary completion is estimated for Dec 2028, 29 months after the start.

Of 89 industry-sponsored phase 1/2 interventional studies under Stomach Neoplasms, half reached primary completion within 60 months of starting (the median), counting those still running; a quarter within 41 and three quarters within 109. This study's planned 29 months is below that.

Counting every sponsor, half of 156 studies reached it within 60 months; a quarter within 41 and three quarters within 109.

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

Registered
Apr 1, 2026
First posted
Apr 14, 2026
StartActual
Jul 16, 2026
Primary completionEst.
Dec 2028
CompletionEst.
Dec 2028
Last update
Oct 20, 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.
Sites
2 sites added. City of Hope Duarte is now Recruiting
Show 2 added (2 United States)
  • City of Hope Duarte · Duarte, United States
  • University of California at Los Angeles · Santa Monica, United States
across 2 updates, Oct 2, 2026 – Oct 20, 2026
Show all 3 updates
  1. Oct 20, 2026
    City of Hope Duarte is now Recruiting
  2. Oct 2, 2026
    2 sites added
    Show 2 added (2 United States)
    • City of Hope Duarte · Duarte, United States
    • University of California at Los Angeles · Santa Monica, United States
    + 1 other change: verification date
  3. Sep 29, 2026
    Minor edits only
    + 2 other changes: verification date and date precision

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

09

Registry details

Key details

Study ID
NCT07529808
Lead sponsor
BigHat Biosciences, Inc.
Responsible party
Sponsor
First posted
Apr 14, 2026
Start date
Jul 16, 2026
Primary completion
Dec 2028 (estimated)
Completion
Dec 2028 (estimated)
Last update
Oct 20, 2026

Oversight

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

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