A Dose Escalation/Expansion Study of Oral OP-1250 in Subjects With Advanced and/or Metastatic HR+, HER2- Breast Cancer
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT04505826 |
Recruitment Status :
Recruiting
First Posted : August 10, 2020
Last Update Posted : October 25, 2021
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Hormone Receptor Positive Breast Carcinoma HER2-negative Breast Cancer | Drug: OP-1250 | Phase 1 Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 94 participants |
Allocation: | Non-Randomized |
Intervention Model: | Sequential Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Phase I/II Open-label, First-in-Human, Multicenter, Dose Escalation and Dose Expansion Study of OP-1250 Monotherapy in Adult Subjects With Advanced and/or Metastatic Hormone Receptor (HR)-Positive, HER2-negative Breast Cancer |
Actual Study Start Date : | August 13, 2020 |
Estimated Primary Completion Date : | October 2023 |
Estimated Study Completion Date : | December 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: OP-1250 Dose Escalation
This portion of the study will evaluate the safety and pharmacology of a range of OP-1250 doses administered daily in subjects with advanced and/or metastatic hormone receptor (HR)-positive, HER2-negative breast cancer and to determine the RP2D
|
Drug: OP-1250
Complete Estrogen Receptor ANtagonist (CERAN) |
Experimental: OP-1250 Expansion
This portion of the study further explores the clinical activity, safety and pharmacology of OP-1250 monotherapy at the RP2D and to estimate preliminary data of anti-tumor efficacy
|
Drug: OP-1250
Complete Estrogen Receptor ANtagonist (CERAN) |
- Determine MTD and/or RP2D of OP-1250 when used as a single agent [ Time Frame: Up to one year ]Number of patients with DLT as defined in the protocol

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
- Must not have received prior oral endocrine therapy > 2 weeks prior to first dose
- Must not have received prior fulvestrant, chemotherapy, antibody therapy, or investigational therapy ≤ 4 weeks prior to the first dose
- Adequate hepatic function
- Adequate renal function
- Normal coagulation panel
- Willingness to use effective contraception
Exclusion Criteria:
- Gastrointestinal disease
- Significant renal disease
- Significant cardiovascular disease
- Significant ECG abnormalities
- Ongoing systemic bacterial, fungal, or viral infection (requiring antimicrobial therapy)
- Pregnancy or breastfeeding

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04505826
Contact: There may be multiple sites in this clinical trial. | (415) 651-7206 | clinical@olemapharma.com |
United States, Florida | |
Advent Health | Recruiting |
Orlando, Florida, United States, 32804 | |
Florida Cancer Center | Recruiting |
Sarasota, Florida, United States, 34232 | |
United States, Oregon | |
OHSU Knight Cancer Institute | Recruiting |
Portland, Oregon, United States, 97239 | |
United States, Tennessee | |
Sarah Cannon Research Institute | Recruiting |
Nashville, Tennessee, United States, 37203 | |
Australia, New South Wales | |
Macquarie University | Recruiting |
Sydney, New South Wales, Australia, 2109 | |
Westmead | Not yet recruiting |
Westmead, New South Wales, Australia, 2145 | |
Australia, Queensland | |
ICON Cancer Centre | Not yet recruiting |
Auchenflower, Queensland, Australia, 4066 | |
Australia, South Australia | |
Cancer Research South Australia | Not yet recruiting |
Adelaide, South Australia, Australia, 5000 | |
Australia, Victoria | |
Peter MacCallum Cancer Centre | Not yet recruiting |
Melbourne, Victoria, Australia, 3000 |
Study Director: | Jo Anne Zujewski, MD | Olema Pharmaceuticals, Inc. | |
Study Director: | Trinh Le | Olema Pharmaceuticals, Inc. |
Responsible Party: | Olema Pharmaceuticals, Inc. |
ClinicalTrials.gov Identifier: | NCT04505826 |
Other Study ID Numbers: |
OP-1250-001 |
First Posted: | August 10, 2020 Key Record Dates |
Last Update Posted: | October 25, 2021 |
Last Verified: | October 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Breast Neoplasms Neoplasms by Site Neoplasms Breast Diseases Skin Diseases |