Phase 1 Study of BAY1905254 - An Early Clinical Research Study to Evaluate a New Drug Called Bapotulimab (BAY1905254) in the Expansion Cohort in Combination With Pembrolizumab in Head and Neck Cancer That Has Returned or is Discovered to be Metastatic and is Expressing PDL1.
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ClinicalTrials.gov Identifier: NCT03666273 |
Recruitment Status :
Active, not recruiting
First Posted : September 11, 2018
Last Update Posted : June 1, 2023
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Condition or disease | Intervention/treatment | Phase |
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Advanced Solid Tumor, Head and Neck Squamous Cell Carcinoma | Drug: Bapotulimab (BAY1905254) Drug: Bapotulimab (BAY1905254) + Pembrolizumab | Phase 1 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 120 participants |
Allocation: | Non-Randomized |
Intervention Model: | Sequential Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | An Open-label, Phase 1, First-in-human, Dose Escalation and Expansion Study to Evaluate the Safety, Tolerability, Maximum Tolerated or Administered Dose, Pharmacokinetics, Pharmacodynamics and Tumor Response Profile of the ILDR2 Function-blocking Antibody BAY1905254 in Patients With Advanced Solid Tumors |
Actual Study Start Date : | September 12, 2018 |
Estimated Primary Completion Date : | June 16, 2023 |
Estimated Study Completion Date : | May 31, 2024 |

Arm | Intervention/treatment |
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Experimental: Dose escalation_Monotherapy
Patients with solid tumor types considered immunosensitive
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Drug: Bapotulimab (BAY1905254)
Intravenous administration of escalating doses of Bapotulimab |
Experimental: Dose escalation_Combination therapy
Patients with solid tumor types considered immunosensitive
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Drug: Bapotulimab (BAY1905254) + Pembrolizumab
Intravenous administration of Bapotulimab of fixed dose (expansion), and of a fixed dose of pembrolizumab |
Experimental: Expansion HNSCC_Combination therapy
Patients with head and neck squamous cell carcinoma (HNSCC)
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Drug: Bapotulimab (BAY1905254) + Pembrolizumab
Intravenous administration of Bapotulimab of fixed dose (expansion), and of a fixed dose of pembrolizumab |
- Incidence of treatment-emergent AEs (TEAEs) including treatment-emergent serious adverse events (TESAEs), adverse events of special interest (AESIs), and dose-limiting toxicities (DLTs) [ Time Frame: Up to 58 months ]
- Severity of treatment-emergent AEs (TEAEs) including treatment-emergent serious adverse events (TESAEs), adverse events of special interest (AESIs), and dose-limiting toxicities (DLTs) [ Time Frame: Up to 58 months ]
- Cmax of Bapotulimab after first dose administration (Cycle 1) for cohorts receiving doses ≥ 20 mg [ Time Frame: Up to 504 hours after drug in Cycle 1 ]Maximum plasma concentration after single dose
- AUC of Bapotulimab after first dose administration (Cycle 1) for cohorts receiving doses ≥ 20 mg [ Time Frame: Up to 504 hours after drug in Cycle 1 ]Area under the plasma concentration curve after single dose
- Maximum tolerated dose (MTD) of Bapotulimab [ Time Frame: Up to 58 months ]
- Recommended dose of Bapotulimab for Phase 2 [ Time Frame: Up to 58 months ]
- Cmax,md after multiple dosing (Cycle 3) for cohorts receiving doses ≥ 20 mg [ Time Frame: Up to 504 hours after drug in Cycle 3 ]Maximum plasma concentration after multiple doses
- AUC after multiple dosing (Cycle 3) for cohorts receiving doses ≥ 20 mg [ Time Frame: Up to 504 hours after drug in Cycle 3 ]Area under the plasma concentration curve after multiple doses
- Incidence of positive anti-drug antibody titer for Bapotulimab [ Time Frame: Up to 58 months ]
- Best overall response rate [ Time Frame: Up to 58 months ]Determined by RECIST 1.1

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 |
Main Inclusion Criteria:
- Male or female patients aged ≥ 18 years.
- Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1.
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Patients must have measurable disease (at least one unidimensional measurable lesion by Computed tomography [CT] or Magnetic resonance imaging [MRI]) per Response evaluation criteria in solid tumors (RECIST) 1.1, and following histologically confirmed, advanced or metastatic solid tumors:
- Dose escalation: All solid tumor types with a likelihood of sensitivity to immunotherapy, as judged by the investigator.
- Expansion of Bapotulimab in combination with pembrolizumab in Head and neck squamous cell carcinoma (HNSCC): recurrent or metastatic head and neck squamous cell carcinoma IO-naïve PDL1+/ CPS≥1(PD-L1: Programmed death ligand 1; CPS: Combined positive score).
- Provision of archival tumor tissue at screening is mandatory for all patients in dose escalation.
- For dose escalation, patients: must have received standard therapy or have no standard therapy available or patients have actively refused any treatment which would be regarded standard. Or in the opinion of investigator have been considered ineligible for a particular form of standard therapy on medical grounds.
- Adequate bone marrow, liver and renal function.
- Adequate cardiac function, measured by echocardiography.
Main Exclusion Criteria:
- History of severe immune related adverse effects from prior immunotherapy (CTCAE v.5.0 Grade 4; CTCAE v.5.0 Grade 3 requiring treatment > 4 weeks), except hypothyroidism clinically stable on hormone replacement treatment and controlled type 1 diabetes.
- Severe (CTCAE v.5.0 Grade ≥ 3) infections within 4 weeks before the first study drug administration, including but not limited to hospitalization for complications of infection, bacteremia, or severe pneumonia. Clinically active infections (CTCAE v.5.0 > Grade 1) within 2 weeks before the first study drug administration.
- Previous or active myocarditis/myositis in history (independent of cause)
- Active or history of autoimmune disease.
- Known human immunodeficiency virus (HIV) infection.
- Active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection.
- Treatment with systemic immunosuppressant medications within 2 weeks before the first study drug administration.
- Ongoing or previous anti-cancer treatment or any immunostimulatory treatment including but not limited to interferons (IFNs), interleukin (IL)-2 and agonists for members of the tumor necrosis factor (TNF) receptor superfamily (e.g. 4-1BB) within 4 weeks before the first study drug administration.
- For dose expansion cohort of Bapotulimab in combination with pembrolizumab in HNSCC: has progressive disease (PD) within six (6) months of completion of curatively intended systemic treatment for locoregionally advanced HNSCC.

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): NCT03666273
United States, Arizona | |
University of Arizona Cancer Center | |
Tucson, Arizona, United States, 85724 | |
United States, Connecticut | |
Yale University School of Medicine | |
New Haven, Connecticut, United States, 06510 | |
United States, Illinois | |
University of Chicago Hospitals | |
Chicago, Illinois, United States, 60637 | |
United States, Michigan | |
Henry Ford Health System | |
Detroit, Michigan, United States, 48202 | |
United States, Ohio | |
University Hospitals Cleveland Medical Center | |
Cleveland, Ohio, United States, 44106 | |
Ohio State University | |
Columbus, Ohio, United States, 43210 | |
United States, Texas | |
University of Texas MD Anderson Cancer Center | |
Houston, Texas, United States, 77030 | |
South Texas Accelerated Research Therapeutics | START San Antonio | |
San Antonio, Texas, United States, 78229 |
Study Director: | Bayer Study Director | Bayer |
Responsible Party: | Bayer |
ClinicalTrials.gov Identifier: | NCT03666273 |
Other Study ID Numbers: |
18789 MK-3475-920 ( Other Identifier: Merck ) 2018-000990-63 ( EudraCT Number ) |
First Posted: | September 11, 2018 Key Record Dates |
Last Update Posted: | June 1, 2023 |
Last Verified: | May 2023 |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
HNSCC Head and Neck Cancer Immunotherapy PD1, PDL1, ILDR2 |
Bapotulimab Pembrolizumab Immune checkpoint inhibitor |
Squamous Cell Carcinoma of Head and Neck Carcinoma, Squamous Cell Carcinoma Neoplasms, Glandular and Epithelial Neoplasms by Histologic Type Neoplasms Head and Neck Neoplasms |
Neoplasms by Site Pembrolizumab Antineoplastic Agents, Immunological Antineoplastic Agents Immune Checkpoint Inhibitors Molecular Mechanisms of Pharmacological Action |