A Phase 1/2 interventional study of YH32367 in HER2-Positive Solid Tumor, sponsored by Yuhan Corporation. Recruiting at 19 sites in 3 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-24.
Sponsored by Yuhan Corporation · Phase 1/2, Interventional, and Treatment
This first-in-human study will be counducted to evaluate the safety, tolerability, pharmacokinetics (PK) and anti-tumor activity of YH32367 in Patients with HER2-Positive Locally Advanced or Metastatic Solid Tumors.
YH32367, a novel HER2/4-1BB bispecific antibody (BsAb), simultaneously targets HER2 and h4-1BB and binds to both targets. YH32367 exhibits a strong 4-1BB signal activation as well as blocking of HER2 signaling in HER2-expressing tumor cells. YH32367 stimulates IFN-γ secretion from T cells and thereby induces tumor cells lysis.
This is a Phase 1/2, open-label, multicenter, first-in-human study of YH32367. This 2-part study will include both a Dose Escalation part, to identify the Maximum Tolerated Dose (MTD) and/or two dose levels for RP2D selection, and a Dose Expansion part, to determine RP2D and to confirm the safety, tolerability and efficacy of YH32367 at the RP2D.
14,825 studies on the registry are indexed under Breast Neoplasms; 3,319 are open to participants now.
This study's planned enrollment of 147 is above the median of 72 across 10,896 interventional studies indexed under Breast Neoplasms.
Browse Breast Neoplasms studies →Yuhan Corporation is the lead sponsor of 110 studies on the registry; 8 are open to participants now.
Counted across the registry records on this site, refreshed daily.
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.
[Dose Escalation Part]
[Dose Expansion Part]
Mandatory provision of tumor tissue sample
Exclusion Criteria:
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.
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.
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.
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
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.
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 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 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.
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.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Measurable disease
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Dose Escalation Part: 8 Cohorts. In Dose Escalation part, patients are assigned to receive YH32367 at a starting dose and the dose being escalated/de-escalated in adjacent dose cohorts. Dose Expansion Part: 2 Cohorts (Cohort 1: Biliary tract cancer, Cohort 2: Solid tumors). Dose Expansion part will consist of multiple cohorts in patients who were treated with at least 1 prior gemcitabine- and/or cisplatin-based therapy, HER2 positive biliary tract cancer(Cohort 1); in patients who were treated with all available standard therapies and have no available options, HER2 positive solid tumor malignancies other than breast and gastric or gastroesophageal junction adenocarcinoma and biliary tract cancer(Cohort 2).
Drug: YH32367
Dose Escalation Part: 8 Cohorts. In this part, approximately 30 patients will be enrolled and patients are assigned to receive YH32367 at a starting dose and the dose being escalated/de-escalated in adjacent dose cohorts will be up to Dose level 8. Dose Expansion Part: 2 Cohorts(Cohort 1: Biliary tract cancer, Cohort 2: Solid tumors). The part will consist of multiple cohorts in patients who were treated with at least 1 prior gemcitabine- and/or cisplatin-based therapy, HER2 positive biliary tract cancer(Cohort 1); in patients who were treated with all available standard therapies and have no available options, HER2 positive solid tumor malignancies other than breast and gastric or gastroesophageal junction adenocarcinoma and biliary tract cancer(Cohort 2). Each cohort will enroll approximately 75 and 40 patients, respectively.
Treatment-emergent adverse events (TEAEs) up to Day 21
To assess the safety and tolerability of YH32367
Time frame: in dose escalation part, an average of 21 days
Objective Response Rate (ORR)
To assess the ORR of YH32367 at the recommended Phase 2 dose (RP2D) according to RECIST v1.1 by blinded independent central reviews (BICR)
Time frame: through dose expansion part completion, approximately 2.5 year
Area under the serum concentration-time curve from time 0 to the last quantifiable concentration (AUClast)
To characterize the PK of YH32367
Time frame: up to 66 weeks
maximum observed serum concentration (Cmax)
To characterize the PK of YH32367
Time frame: up to 66 weeks
time to reach Cmax (Tmax)
To characterize the PK of YH32367
Time frame: up to 66 weeks
Presence and characterization of YH32367 ADA in serum including titer of ADA and neutralizing antibodies
To explore the immunogenicity of YH32367
Time frame: through study completion, approximately 3.5 year
Objective Response Rate (ORR)
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Duration of Response (DoR)
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Disease Control Rate (DCR)
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Depth of Response
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Time to Response
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Progression-free survival (PFS)
To assess the anti-tumor efficacy according to RECIST v1.1 by Investigator assessment
Time frame: through study completion, approximately 3.5 year
TEAEs
To assess the safety and tolerability of YH32367 at the RP2D
Time frame: through dose expansion part completion, approximately 2.5 year
Overall Survival (OS)
To assess overall survival of YH32367
Time frame: through study completion, approximately 3.5 year
Immune ORR (iORR)
To assess the immune-related efficacy according to iRECIST by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Immune Duration of Response (iDOR)
To assess the immune-related efficacy according to iRECIST by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Immune PFS (iPFS)
To assess the immune-related efficacy according to iRECIST by Investigator assessment
Time frame: through study completion, approximately 3.5 year
Not enrolling at this site.
Not enrolling at this site.
Not enrolling at this site.
Not enrolling at this site.
Plan to share: Yes — De-identified individual participant data (including data dictionaries) that underline the results reported in study-related publications will be made available during the period beginning 1 year and ending 5 years after all trial primary and secondary endpoints were assessed. Only requests from researchers who provide a methodologically sound proposal will be reviewed and approved by the sponsor. The analysis type should be in accordance with aims in the proposal approved by the sponsor. Proposals should be directed to andrew90@yuhan.co.kr. A summary of the study results will be posted in the publicly accessible database (i.e. clinicaltrials.gov) no later than 1 year after the study's primary completion date.
Supporting information: Study protocol, Statistical analysis plan, Clinical study report
Time frame: Beginning 1 year and ending 5 years after all trial endpoints were assessed
Access criteria: Only requests from researchers who provide a methodologically sound proposal will be reviewed and approved by the sponsor. The analysis type should be in accordance with aims in the proposal approved by the sponsor. Proposals should be directed to andrew90@yuhan.co.kr.
No publications or documents are linked to this record.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions 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.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.