A Trial to Evaluate Safety and Tolerability of TST001 in Advanced or Metastatic Solid Tumors
Bile Duct Cancer
Stomach/ Gastric Cancer
18 Years and older, Male and Female
This is an open label Phase I/IIa, First in Human trial of TST001, a recombinant humanized
anti-Claudin 18.2 (CLDN18.2) IgG1 monoclonal antibody as monotherapy or in combination with
nivolumab. It is being tested against advanced and/or metastatic solid tumors including
gastric, gastroesophageal junction, pancreatic, Biliary Tract cancers, etc..
Part A of the trial will consist of two cohorts, one dosed every 2 weeks and one dosed every
3 weeks in a standard 3+3 design. Part A is the dose finding portion of the trial.
30 to 60 participants will be enrolled.
Part B consists of 3 cohorts of approximately 20-30 participants each. For Part B,
participants must have CLDN18.2 expressing tumors to qualify for participation. Cohort A is
for participants with gastric and gastroesophageal junction cancers. Cohort B is for
participants with gastric and gastroesophageal cancers in combination therapy with nivolumab.
Cohort C is for tumors limited to pancreatic or biliary tract cancers.
The trial will last approximately 3 years, with assessments including but not limited to
safety labs, ECGs, MUGA scans, PKs and PDs and CT/MRI tumor assessments, based on emerging
data found in Part A.
- Male or female = 18 years.
- Patients with histologically or cytologically confirmed, locally advanced or metastatic solid tumors.
- Patients must be: a) progressed after standard therapies, b) intolerant of standard therapies, or c) with a tumor type without standard therapy. d) Patients with HER2+ GC/GEJ cancer must have progressed after HER2-targeted therapy.
- CLDN18.2 expression in tumor (Part B only):
- Cohort A and Cohort B Patients: with GC/GEJ cancer
- Cohort C: Patients with pancreatic cancer or BTC
- Eastern Cooperative Oncology Group Performance Status (ECOG PS): 0-1 .
- Patients with adequate cardiac, liver, renal function, etc.
**Clinical trials are research studies that involve people. These studies test new ways to prevent, detect, diagnose, or treat diseases. People who take part in cancer clinical trials have an opportunity to contribute to scientists’ knowledge about cancer and to help in the development of improved cancer treatments. They also receive state-of-the-art care from cancer experts... Click here to learn more about clinical trials