A Trial to Learn How Safe AZD9750 is and How Well it Works in People With Metastatic Prostate Cancer When Given With or Without Other Anticancer Drugs (ANDROMEDA)

A Phase I/II, Modular, Open-Label, Multi-Centre Study to Evaluate the Safety, Pharmacokinetics, Pharmacodynamics and Preliminary Efficacy of AZD9750 as Monotherapy and in Combination With Other Anticancer Agents in Participants With Metastatic Prostate Cancer (ANDROMEDA)

ANDROMEDA is a first-in-human, Phase I/II, open-label, multicenter study of AZD9750 in participants with metastatic prostate cancer. The trial evaluates safety, tolerability, pharmacokinetics/pharmacodynamics, and preliminary efficacy of AZD9750 as monotherapy and in combination with saruparib.

Study Overview

• Status: Recruiting
• Conditions: Prostate Cancer
• Intervention / Treatment: Drug: AZD9750; Drug: AZD5305

Detailed Description

This first-in-human (FiH), Phase I/II, open-label, multicenter study will evaluate the safety, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary efficacy of AZD9750 as monotherapy and in combination with saruparib in participants with metastatic prostate cancer. Additional combinations with other anticancer agents may be added via protocol amendment as separate modules. The study follows a modular design, allowing initial assessment of safety, tolerability, and preliminary efficacy across multiple treatment arms. Each Module has 2 parts: Part A (monotherapy dose escalation or combination dose finding) and Part B (monotherapy dose optimization and expansion or combination dose expansion). Treatment continues until disease progression, unacceptable toxicity, withdrawal of consent, or other reasons to discontinue study intervention occur.

• Study Type: Interventional
• Enrollment (Estimated): 300
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: AstraZeneca Clinical Study Information Center; Phone Number: 1-877-240-9479; Email: information.center@astrazeneca.com

Study Locations

• Australia
  • Melbourne, Australia, 3000
    • Recruiting
    • Research Site
• Canada
  • Alberta
    • Calgary, Alberta, Canada, T2N 5G2
      • Not yet recruiting
      • Research Site
  • British Columbia
    • Vancouver, British Columbia, Canada, V5Z 1H7
      • Not yet recruiting
      • Research Site
• China
  • Chengdu, China, 610041
    • Not yet recruiting
    • Research Site
• Japan
  • Chūōku, Japan, 104-0045
    • Not yet recruiting
    • Research Site
  • Kashiwa, Japan, 227-8577
    • Recruiting
    • Research Site
• Netherlands
  • Amsterdam, Netherlands, 1066CX
    • Not yet recruiting
    • Research Site
  • Rotterdam, Netherlands, 3015 GD
    • Not yet recruiting
    • Research Site
• Spain
  • Barcelona, Spain, 8035
    • Not yet recruiting
    • Research Site
• United Kingdom
  • Cambridge, United Kingdom, CB2 2QQ
    • Recruiting
    • Research Site
• United States
  • California
    • Duarte, California, United States, 91010
      • Recruiting
      • Research Site
    • San Francisco, California, United States, 94143
      • Not yet recruiting
      • Research Site
  • Florida
    • Tampa, Florida, United States, 33612
      • Not yet recruiting
      • Research Site
  • Massachusetts
    • Boston, Massachusetts, United States, 02114
      • Not yet recruiting
      • Research Site
  • Missouri
    • St Louis, Missouri, United States, 63108
      • Not yet recruiting
      • Research Site
  • South Carolina
    • Myrtle Beach, South Carolina, United States, 29572
      • Recruiting
      • Research Site
  • Tennessee
    • Nashville, Tennessee, United States, 37203
      • Recruiting
      • Research Site
  • Utah
    • Salt Lake City, Utah, United States, 84112
      • Not yet recruiting
      • Research Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

• Inclusion Criteria:

  • Participant must be ≥18 years or the legal age at the time of signing the informed consent form.
  • Histologically or cytologically confirmed diagnosis of adenocarcinoma of the prostate.
  • Documented metastatic disease.
  • Serum testosterone levels ≤ 50 ng/dL.

  • Evidence of disease progression with one of the following:

    1. PSA progression defined by a minimum of 3 rising PSA levels with an interval of ≥ 1 week between each determination.
    2. Radiographic progression of soft tissue disease by RECIST v1.1 with or without PSA progression.
    3. Radiographic progression of bone metastasis with 2 or more documented new bone lesions on a bone scan with or without PSA progression.
  • ECOG performance status score of 0 or 1.
  • Adequate bone marrow and organ function.

  • Part A (Module 1)

    • (a) Part A1 dose escalation: at least 1 prior ARPI and, if applicable, at least 1 taxane-based chemotherapy (regardless of whether in HSPC or CRPC setting).
    • (b) Part A2 backfill: at least 1 but no more than 2 prior ARPIs and, if applicable, at least 1 but no more than 2 prior taxane-based chemotherapies (regardless of whether in HSPC or CRPC setting).

  • Part B (Module 1)

    • (a) B1/B2 dose optimization/expansion: at least 1 but no more than 2 prior ARPIs and, if applicable, at least 1 but no more than 2 prior taxane-based chemotherapies (regardless of whether in HSPC or CRPC setting).
    • (b) B3 dose expansion (no taxane cohort): at least 1 but no more than 2 prior ARPIs for metastatic prostate cancer (regardless of whether in HSPC or CRPC setting). No prior taxane is allowed for inclusion in this cohort.

• Exclusion Criteria:

  • Participants with pathological finding consistent with any presence of small cell carcinoma, predominant neuroendocrine carcinoma, or any predominant histology other than prostate adenocarcinoma.
  • Brain metastases, or spinal cord compression.
  • Any clinically significant cardiac disorders including QT prolongation, abnormal electrocardiogram (ECG).
  • Any clinically significant cardiovascular diseases including symptomatic heart failure, uncontrolled hypertension, acute coronary syndrome, cardiomyopathy, valvular heart disease, atrial fibrillation, stroke.
  • Active gastrointestinal disease or other condition that will interfere significantly with the absorption, distribution, metabolism of AZD9750 and relevant combination IMPs.
  • Participants with any known predisposition to bleeding (eg, active peptic ulceration, recent [within 6 months] hemorrhagic stroke, proliferative diabetic retinopathy).
  • Prior treatment with an AR-PROTAC.

Other protocol-defined inclusion/exclusion criteria apply.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

7

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Module 1 / Part A1; AZD9750 Monotherapy (Dose Escalation) - No randomization	Drug: AZD9750; AR-PROTAC
Experimental: Module 1 / Part A2; AZD9750 Monotherapy (Backfills) - No randomization	Drug: AZD9750; AR-PROTAC
Experimental: Module 1 / Part B1; AZD9750 Monotherapy (Dose Optimization) - Randomization	Drug: AZD9750; AR-PROTAC
Experimental: Module 1 Part B2; AZD9750 Monotherapy (Dose Expansion) - No randomization	Drug: AZD9750; AR-PROTAC
Experimental: Module 1 / Part B3; AZD9750 Monotherapy (Dose Expansion) - No randomization	Drug: AZD9750; AR-PROTAC
Experimental: Module 2 / Part A; AZD9750 + Saruparib (Combination Dose Finding) - No Randomization	Drug: AZD9750; AR-PROTAC; Drug: AZD5305; PARP1-selective inhibitor; Other Names: Saruparib
Experimental: Module 2/ Part B; AZD9750 + Saruparib (Combination Dose Expansion) - No Randomization	Drug: AZD9750; AR-PROTAC; Drug: AZD5305; PARP1-selective inhibitor; Other Names: Saruparib

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of participants with dose-limiting toxicity (DLT), as defined in the protocol (Part A only)	To evaluate the safety and tolerability and determine the MTD and/or the RDE(s)/RP2D of AZD9750 as a monotherapy and in combination with other anticancer agents in participants with mCRPC. 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.	From first dose of study intervention to 28 days post first dose
Number of participants with Adverse Events and Serious Adverse Events	The number of participants with adverse events and with serious adverse events will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Number of participants with Adverse Events leading to discontinuation of study intervention	The number of participants with clinically significant changes from baseline in vital signs will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Clinically significant changes from baseline in vital signs.	The number of participants with clinically significant changes from baseline in vital signs will be assessed.	From first study dose up to 37 days after the last dose of study treatment
Clinically significant changes from baseline in physical examination.	The number of participants with clinically significant changes from baseline in physical examination will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Clinically significant changes from baseline in ECOG PS.	The number of participants with clinically significant changes from baseline in ECOG PS will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Clinically significant changes from baseline in ECGs.	The number of participants with clinically significant changes from baseline in ECGs will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Clinically significant changes from baseline in laboratory parameters.	The number of participants with clinically significant changes from baseline in laboratory parameters will be assessed.	From first dose of study intervention up to 37 days after the last dose of study treatment
Proportion of participants achieving a ≥50% decrease in PSA from baseline (PSA50) (Part B only)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents in participants with mCRPC.	From first dose of study intervention up to 14 days after the last dose of study treatment

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Proportion of participants achieving a ≥ 50% decrease in PSA from baseline (PSA50) (Part A only)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents.	From first dose of study intervention up to initiation of subsequent anticancer therapy (or radiotherapy on target lesions), PSA progression or 14 days after the last dose of study treatment
Proportion of participants achieving a ≥ 90% decrease in PSA from baseline (PSA90)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents.	From first dose of study intervention up to initiation of subsequent anticancer therapy (or radiotherapy on target lesions), PSA progression or 14 days after the last dose of study treatment
Objective response rate (ORR)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. ORR will be assessed according to RECIST v1.1 and PCWG3 criteria (bone) and is defined as the percentage of participants who have a confirmed best overall response of CR or PR or NED (in case the subject has neither TLs nor NTLs at baseline) that occurs prior to the initiation of subsequent anticancer treatment (or radiotherapy on target lesions) and prior to progression.	From randomisation or first dose of study intervention to initiation of subsequent anticancer treatment (or radiotherapy on target lesions) or progression, assessed up to 60 months
Duration of response (DoR)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. DoR is defined as the time from the date of first documented objective response (which is subsequently confirmed) until the date of first documented radiological disease progression or death (by any cause in the absence of disease progression).	From randomisation or first dose of study intervention to the date of first documented radiological disease progression, assessed up to 60 months
Time to response (TTR)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. TTR is defined as the time from randomisation/first dose until the first documentation of a subsequently confirmed objective response prior to progression and prior to starting any subsequent cancer therapy (or radiotherapy on target lesions).	From randomisation or first dose of study intervention to initiation of subsequent anticancer treatment (or radiotherapy on target lesions) or progression, assessed up to 60 months
Radiographic progression-free survival (rPFS)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. rPFS is defined as the time from the date of randomisation or first dose until the date of radiographic progression, as assessed per RECIST v1.1 (soft tissue) and/or PCWG3 criteria (bone) and derived from the raw tumour data or death (by any cause in the absence of progression).	From randomisation or first dose of study intervention to progression, assessed up to 60 months
Best percentage change in target lesion size from baseline	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. The best change in tumour size from baseline (i.e. depth of response) is the largest decrease from baseline or the smallest increase from baseline in the absence of a reduction and includes all assessments: up to and including the first visit at which the overall visit response is PD,; prior to death in the absence of progression,; prior to the start of subsequent anti-cancer therapy (or radiotherapy on target lesions); or up to and including the last evaluable RECIST assessment if the subject has not died, progressed or started subsequent anti-cancer therapy (or radiotherapy on target lesions).	From screening (Day -28) to initiation of subsequent anticancer treatment (or radiotherapy on target lesions) or progression, assessed up to 60 months
Time to PSA response (TTPSA50, TTPSA90)	To evaluate the preliminary antitumour efficacy of AZD9750 as monotherapy and in combination with other anticancer agents. TTPSA is defined as the time from randomisation or first dose date until the date of the first documented PSA50 or PSA90 response (which is subsequently confirmed), respectively.	From first dose of study intervention up to initiation of subsequent anticancer therapy (or radiotherapy on target lesions), PSA progression or 14 days after the last dose of study treatment
Cmax of AZD9750	To characterize the PK of AZD9750 as monotherapy and in combination with other anticancer agents.	From date of first dose of study intervention up to 115 days after first dose
tmax of AZD9750	To characterize the PK of AZD9750 as monotherapy and in combination with other anticancer agents.	From date of first dose of study intervention up to 115 days after first dose
AUC of AZD9750	To characterize the PK of AZD9750 as monotherapy and in combination with other anticancer agents.	From date of first dose of study intervention up to 115 days after first dose
Cmax of saruparib (Module 2 only)	To characterize the PK of saruparib in combination with AZD9750.	From date of first dose of study intervention up to 57 days after first dose
Tmax of saruarib (Module 2 only)	To characterize the PK of saruparib in combination with AZD9750.	From date of first dose of study intervention up to 57 days after first dose
AUC of saruparib (Module 2 only)	To characterize the PK of saruparib in combination with AZD9750.	From date of first dose of study intervention up to 57 days after first dose

Collaborators and Investigators

• Sponsor: AstraZeneca

Study record dates

Study Major Dates

• Study Start (Actual): January 27, 2026
• Primary Completion (Estimated): January 26, 2029
• Study Completion (Estimated): January 26, 2029

Study Registration Dates

• First Submitted: December 19, 2025
• First Submitted That Met QC Criteria: January 12, 2026
• First Posted (Actual): January 13, 2026

Study Record Updates

• Last Update Posted (Actual): May 1, 2026
• Last Update Submitted That Met QC Criteria: April 30, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Keywords: Prostate Cancer; Androgen Receptor; Metastasic Prostate Cancer; Proteolysis-targeting chimeras (PROTACs)
• Additional Relevant MeSH Terms: Urogenital Diseases; Genital Diseases; Central Nervous System Diseases; Nervous System Diseases; Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Prostatic Diseases; Male Urogenital Diseases; Neuromuscular Diseases; Genetic Diseases, Inborn; Neurodegenerative Diseases; Heredodegenerative Disorders, Nervous System; Genetic Diseases, X-Linked; Spinal Cord Diseases; Motor Neuron Disease; Muscular Atrophy, Spinal; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Prostatic Neoplasms; Bulbo-Spinal Atrophy, X-Linked; AZD5305
• Other Study ID Numbers: D7270C00001

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No