NCT07529717 · AstraZeneca
First-in-Human Study to Evaluate AZD8359 STEAP2 TCE in Participants With Prostate Cancer
(CRIUS-1)
What this study is about
This study is being conducted to learn more about the safety, tolerability, and effectiveness of an experimental treatment for metastatic prostate cancer called AZD8359. The study is split into different modules which will look at AZD8359 delivered by different methods.
View original scientific description
This study is being conducted to learn more about the safety, tolerability, and effectiveness of an experimental treatment for metastatic prostate cancer called AZD8359. The study is split into different modules which will look at AZD8359 delivered by different methods. The study is also further split into 2 parts, Part A which will test different dose levels and dosing schedules of AZD8359 to determine which doses are the best in terms of safety and side effects (dose escalation), and Part B will further test at least two AZD8359 doses in a larger group of participants (dose expansion).
Interventions
DRUG
AZD8359
AZD8359 Monotherapy Administration route 1
DRUG
AZD8359
AZD8359 Monotherapy Administration route 2
DRUG
AZD8359
AZD8359 Monotherapy Administration route 1 (Module 1) or administration route 2 (Module 2) at Recommended Dose for Expansion 1 (RDE1)
DRUG
AZD8359
AZD8359 Monotherapy Administration route 1 (Module 1) or administration route 2 (Module 2) at Recommended Dose for Expansion 2 (RDE2)
Primary outcome measures
Number of participants with adverse events (AE), adverse events of special interest (AESI), and serious adverse events (SAE)
Time frame: From time of Informed Consent to 90 days post last dose of study intervention (up to 3 years)
Number of participants with AEs, AESIs, SAEs, including AEs leading to discontinuation of study intervention and clinically significant alterations from baseline in laboratory parameters, vital signs, ECGs and physical examination results
Number of participants with dose-limiting toxicity (DLT), as defined in the protocol (Part A only)
Time frame: From first study dose to 21 OR 28 days post first dose based on schedule
A DLT is a toxicity defined by the study protocol that occurs from the first dose of study intervention up to the end of the DLT evaluation period that is assessed as clearly unrelated to the primary disease or intercurrent illness
PSA response rate (Part B only)
Time frame: Up to 3 years
Number of participants with a PSA50 response
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Histologically confirmed diagnosis of adenocarcinoma of the prostate or neuroendocrine differentiated prostate cancer
- Surgically or medically castrated with serum testosterone levels ≤ 50 ng/dL (≤ 1.75 nmol/L)
- PSA value at screening should be ≥ 1ng/mL
- Evidence of disease progression within 6 months prior to screening
- Part A Participants should have received at least 2 prior approved systemic therapies for prostate cancer with at least one androgen receptor pathway inhibitor and at least one taxane regimen if amenable
- Part B Participants should have received an androgen receptor pathway inhibitor for metastatic hormone sensitive prostate cancer or metastatic castration resistant prostate cancer (mCRPC). No prior taxane treatment for mCRPC is allowed for Module 1 and 2 Part B patients
- Adequate organ function
- Body weight ≥ 35 kg
Exclusion criteria
- Any clinically relevant cardiac abnormalities such as QT prolongation or uncontrolled cardiac arrythmias
- All prior treatment-related adverse events must have resolved to Grade ≤ 2
- History of Grade ≥ 3 cytokine release syndrome or Grade ≥ 2 immune effector cell-associated neurotoxicity syndrome with prior therapy
- Active or prior documented autoimmune or inflammatory disorders within the past 3 years
- Prior exposure to any STEAP2 targeted agents or TCEs for prostate cancer
Where
- Orlando, Florida
- East Brunswick, New Jersey
- Hackensack, New Jersey
- Providence, Rhode Island
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jul 13, 2026 · Source of record for eligibility and locations