A Phase 2 interventional study of AZD0901 and 5-Fluorouracil in Gastric Cancer, Gastroesophageal Junction Cancer and Biliary Tract Cancer, sponsored by AstraZeneca. Recruiting at 52 sites in 14 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-30.
Sponsored by AstraZeneca · Phase 2, Interventional, and Treatment
The purpose of this study is to assess the safety, tolerability, efficacy, pharmacokinetics (PK), and immunogenicity of AZD0901 as monotherapy and in combination with anti-cancer agents in participants with locally advanced unresectable or metastatic solid tumours expressing CLDN18.2 .
This open-label, multi-centre study consists of individual sub studies, each evaluating the safety and tolerability of AZD0901.
Sub study 1 will investigate the safety, tolerability, and anti-tumour activity of AZD0901 monotherapy in participants with advanced or metastatic gastric esophageal cancer expressing CLDN18.2. Participants will receive AZD0901 monotherapy via intravenous (IV) infusion and will be randomised in to one of 2 arms.
Sub study 2 will consist of two parts, a safety run-in and a dose expansion part to investigate the safety and efficacy of AZD0901 in combination with different chemotherapy agents in participants with pancreatic cancer. Substudy 3 will investigate the safety, tolerability, and anti-tumour activity of AZD0901 monotherapy in participants with advanced or metastatic Biliary tract cancer.
3,399 studies on the registry are indexed under Stomach Neoplasms; 992 are open to participants now.
This study's planned enrollment of 226 is above the median of 66 across 2,499 interventional studies indexed under Stomach Neoplasms.
Browse Stomach Neoplasms studies →AstraZeneca is the lead sponsor of 3,499 studies on the registry; 270 are open to participants now.
Of its 368 completed or terminated interventional studies of FDA-regulated products, 178 (48%) have results posted.
Counted across the registry records on this site, refreshed daily.
The list below is a summarised eligibility criteria for the study - refer to the study protocol for full criteria.
Master Inclusion Criteria applicable to all sub studies:
Sub study 1 Specific Inclusion criteria:
Sub study 2 Specific Inclusion criteria:
Sub study 3 Specific Inclusion criteria
Master Exclusion Criteria applicable to all sub studies:
Sub study 1 Specific Exclusion criteria:
Sub study 2 Specific Exclusion criteria:
Sub study 3 Specific 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 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.
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.
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.
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.
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.
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.
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.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.
“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.
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.
Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.
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.
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.
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.
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.
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
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.
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.
Line of therapy
A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.
“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Adjuvant and neoadjuvant
Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Sub Study 1 will investigate AZD0901 monotherapy in order to evaluate the safety, tolerability, and efficacy of AZD0901.
Drug: AZD0901
Substudy 2 will investigate the safety and efficacy of AZD0901 as first line systemic treatment used in combination with different chemotherapy agents
Drug: AZD0901 · Drug: 5-Fluorouracil · Drug: Leucovorin · Drug: l-leucovorin · Drug: Irinotecan · Drug: Nanoliposomal Irinotecan · Drug: Gemcitabine
Substudy 3 Further evaluate the preliminary anti-tumour activity of AZD0901 monotherapy by assessment of DRR.
Drug: AZD0901
Antibody-drug conjugate/Biologic
Also known as: CMG901
Chemotherapy agents
Also known as: 5-FU
Chemotherapy agents
Also known as: LV
Chemotherapy agents
Also known as: I-LV
Chemotherapy agents
Also known as: Camptosar
Chemotherapy agents
Also known as: ONIVYDE
Chemotherapy agents
Also known as: Gemzar
Incidence of adverse events (AEs), serious AEs (SAEs). Changes from baseline in clinical laboratory parameters, vital signs, ECGs and physical examination. Rate of AEs leading to discontinuation of AZD0901, Occurrence of DLTs.
To investigate the safety and tolerability, of AZD0901 monotherapy or in combination with anti-cancer agents in particpants with advanced or metastatic solid tumours expressing CLDN18.2.
Time frame: 30 days post treatment completion. AE Follow Up for 90 days post AZD0901 discontinuation.
Objective Response Rate (ORR).
Proportion of participants with a confirmed Complete Response (CR) or Partial Response (PR) as determined by the Investigator at local site as per RECIST v1.1.
Time frame: From date of first dose of AZD0901 up until progression, or the last evaluable assessment in the absence of progression (approximately 2 years).
Overall Survival (OS)
The analysis will include all dosed/randomised participants as assigned/randomised. All deaths will be included, regardless of whether the participant withdraws from therapy or receives another anticancer therapy.
Time frame: From date of first dose/randomisation until the date of death due to any cause (approximately 2 years).
Progression Free Survival (PFS)
Progression-free survival is defined as the time date of randomisation or enrollment until progression per RECIST v1.1 as assessed by the Investigator at local site, or death due to any cause, regardless of whether the participant withdraws from randomized therapy, receives another anti-cancer therapy or clinically progresses prior to RECIST v1.1 progression.
Time frame: From date of first dose/randomisation until disease progression or death in the absence of progression (approximately 2 years).
Duration of Response (DoR)
The time from the date of first documented confirmed response until date of first documented progression per RECIST v1.1 or death due to any cause.
Time frame: From the date of first documented confirmed response until date of documented progression (approximately 2 years).
Disease control rate (DCR)
The percentage of participants who have a confirmed CR or PR or who have SD per RECIST v1.1 as assessed by the Investigator at local site and derived from the raw tumour data up to 11 weeks after date of first dose/randomisation.
Time frame: Up to 11 weeks post date of first dose/randomisation
Percentage change in tumor size
The best percentage change from baseline in tumor size is the largest decrease (or smallest increase) from baseline for a participant, using RECIST v1.1 assessments.
Time frame: From start through to study completion.
Serum concentration of AZD0901 (total ADC), total antibody (conjugated and unconjugated) and total unconjugated MMAE
To characterise the PK of AZD0901 monotherapy or in combination with anti cancer agents in participants with advanced or metastatic solid tumours expressing CLDN18.2.
Time frame: From date of first dose of AZD0901 up until 90 days post AZD0901 discontinuation.
Serum PK parameters of AZD0901, total antibody (conjugated and unconjugated) and MMAE including but not limited to AUC, Cmax, tmax, clearance and half-life, as data allow.
To characterise the PK of AZD0901 monotherapy or in combination with anti cancer agents in participants with advanced or metastatic solid tumours expressing CLDN18.2.
Time frame: From date of first dose of AZD0901 up until 90 days post AZD0901 discontinuation.
Clinical activity by baseline and/or on-treatment tissue-based biomarkers including, but not limited to, gene expression, mutation profiles, DNA damage, protein expression, immune response and/or mechanisms of resistance.
To investigate baseline and/or on-treatment tissue-based RNA, DNA, and/or proteins, and association with clinical activity of AZD0901 (substudy 1).
Time frame: From date of first dose of AZD0901 up to 7 weeks.
ADA status will be determined along with prevalence and incidence of anti-drug antibodies to AZD0901, and titer established.
To determine the immunogenicity of AZD0901 monotherapy or in combination with anti-cancer agents in participants with advanced or metastatic solid tumours expressing CLDN18.2.
Time frame: From date of first dose of AZD0901 up until 90 days post AZD0901 discontinuation.
Not enrolling at this site — choose another above.
Not enrolling at this site — choose another above.
Not enrolling at this site — choose another above.
Not enrolling at this site — choose another above.
Not enrolling at this site — choose another above.
Not enrolling at this site — choose another above.
Plan to share: Yes — Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure "Yes", indicates that AZ are accepting requests for IPD, but this does not mean all requests will be approved.
Supporting information: Study protocol, Statistical analysis plan
Time frame: AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA/PhRMA Data-Sharing Principles. For details of our timelines, please refer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure
Access criteria: When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org. A Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information.
Data sharing details ↗ · astrazenecagroup-dt.pharmacm.com
No publications or documents are linked to this record.
Started Dec 2023 (actual). Primary completion is estimated for Nov 2026, 35 months after the start.
Of 65 industry-sponsored phase 2 interventional studies under Stomach Neoplasms, half reached primary completion within 38 months of starting (the median), counting those still running; a quarter within 25 and three quarters within 68. This study's planned 35 months is close to that.
Counting every sponsor, half of 358 studies reached it within 50 months; a quarter within 31 and three quarters within 75.
How these figures are worked out, and which studies are left out of them.
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 ↗
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.
Studies of the drug tested here: Sonesitatug vedotin