Clinical Trials

Multiple Phase 1 and Phase 2 clinical trials, sponsored primarily by Oncoethix GmbH and Merck Sharp & Dohme LLC, have evaluated birabresib across various advanced solid tumors and hematologic malignancies. The evaluated indications include NUT midline carcinoma, castration-resistant prostate cancer, triple-negative breast cancer, non-small cell lung cancer, glioblastoma multiforme, acute myeloid leukemia, diffuse large B-cell lymphoma, and multiple myeloma. While several of these trials were completed, others were terminated or withdrawn.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02698189 TERMINATED
AML Including AML de Novo and AML Secondary to MDS; DLBCL
Merck Sharp & Dohme LLC
2016-05-19 PHASE1
NCT02698176 TERMINATED
NUT Midline Carcinoma (NMC); Triple Negative Breast Cancer (TNBC); Non-small Cell Lung Cancer (NSCLC); Castration-resistant Prostate Cancer (CRPC)
Merck Sharp & Dohme LLC
2016-05-04 PHASE1
NCT02259114 COMPLETED
NUT Midline Carcinoma; Triple Negative Breast Cancer; Non-small Cell Lung Cancer With Rearranged ALK Gene/Fusion Protein or KRAS Mutation; Castrate-resistant Prostate Cancer; CRPC; Pancreatic Ductal Adenocarcinoma
Oncoethix GmbH, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
2014-10-23 PHASE1
NCT01713582 COMPLETED
Acute Myeloid Leukemia; Diffuse Large B-cell Lymphoma; Acute Lymphoblastic Leukemia; Multiple Myeloma
Oncoethix GmbH, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
2012-12-14 PHASE1
NCT02698176 Terminated
NUT Midline Carcinoma (NMC)|Triple Negative Breast Cancer (TNBC)|Non-small Cell Lung Cancer (NSCLC)|Castration-resistant Prostate Cancer (CRPC)
Merck Sharp & Dohme LLC
2016-05-04 Phase 1
NCT02698189 Terminated
AML Including AML de Novo and AML Secondary to MDS|DLBCL
Merck Sharp & Dohme LLC
2016-05-19 Phase 1
NCT02303782 WITHDRAWN
Acute Myeloid Leukemia
Oncoethix GmbH, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
2015-01 PHASE1; PHASE2
NCT02296476 TERMINATED
Glioblastoma Multiforme
Oncoethix GmbH, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
2014-10-29 PHASE2
NCT02296476 Terminated
Glioblastoma Multiforme
Oncoethix GmbH a subsidiary of Merck & Co. Inc. (Rahway New Jersey USA)
2014-10-29 Phase 2
NCT02259114 Completed
NUT Midline Carcinoma|Triple Negative Breast Cancer|Non-small Cell Lung Cancer With Rearranged ALK Gene/Fusion Protein or KRAS Mutation|Castrate-resistant Prostate Cancer|CRPC|Pancreatic Ductal Adenocarcinoma
Oncoethix GmbH a subsidiary of Merck & Co. Inc. (Rahway New Jersey USA)
2014-10-23 Phase 1
NCT01713582 Completed
Acute Myeloid Leukemia|Diffuse Large B-cell Lymphoma|Acute Lymphoblastic Leukemia|Multiple Myeloma
Oncoethix GmbH a subsidiary of Merck & Co. Inc. (Rahway New Jersey USA)
2012-12-14 Phase 1

(data from https://clinicaltrials.gov, updated on 2022-09-13)

Check the Birabresib (OTX015) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Birabresib selectively binds to the BET bromodomain proteins BRD2, BRD3, and BRD4, preventing their reader domain interactions with acetylated chromatin and suppressing downstream expression of oncogenic driver genes including NSD3. This transcriptional inhibition halts tumor cell proliferation and triggers apoptosis, underpinning its clinical evaluation in indications such as acute myeloid leukemia, NUT midline carcinoma, and castration-resistant prostate cancer.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.