Trial of 225Ac-DOTATATE (RYZ101) in Subjects With ER+, HER2-negative Unresectable or Metastatic Breast Cancer Expressing SSTRs.

Last updated:
2026-07-18
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View trial details

Overview

Official protocol title:

PHASE 1B/2 OPEN-LABEL TRIAL OF 225AC-DOTATATE (RYZ101) IN SUBJECTS WITH ESTROGEN RECEPTOR-POSITIVE (ER+), HUMAN EPIDERMAL GROWTH FACTOR RECEPTOR 2 (HER2)-NEGATIVE, LOCALLY ADVANCED AND UNRESECTABLE OR METASTATIC BREAST CANCER EXPRESSING SOMATOSTATIN RECEPTORS (SSTRS) AND PROGRESSED AFTER ANTIBODY-DRUG CONJUGATES AND/OR CHEMOTHERAPY (TRACY-1)

Intervention/treatment:
RYZ101 (ACTINIUM AC 225 DOTATATE) / ARGININE-LYSINE (LYSAKARE)
Medical condition:
BREAST CANCER
Protocol code:
RYZ101-201
Control number:
295478
Status:
Active, not recruiting
Approved:
April 17, 2025
Trial phase:
Phase 1, Phase 2
For more information:
ClinicalTrials.gov - NCT06590857
This is an external link. The information is not authorized by the Government of Canada.

Eligibility

Sex: ALL
Age
18 Years and older
Accepts healthy volunteers: No

Contacts and locations

Contact
Name
RayzeBio Clinical Trials
Role
CONTACT
Phone:
1-619-657-0057
Sponsor
RAYZEBIO, INC.

Locations

British Columbia

Research Facility
Victoria, British Columbia, V8R 6V5
RECRUITING
Name
Site Contact
Role
CONTACT

Ontario

Research Facility
Toronto, Ontario, M4N 3M5
RECRUITING
Name
Site Contact
Role
CONTACT
Research Facility
Toronto, Ontario, M5G 2M9
RECRUITING
Name
Site Contact
Role
CONTACT

Quebec

Research Facility
Québec, Quebec, G1S 4L8
RECRUITING
Name
Site Contact
Role
CONTACT
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