A Study of Pembrolizumab (MK-3475) Plus Carboplatin and Paclitaxel as First-line Treatment of Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (MK-3475-B10/KEYNOTE B10)
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ClinicalTrials.gov Identifier: NCT04489888 |
Recruitment Status :
Active, not recruiting
First Posted : July 28, 2020
Last Update Posted : March 29, 2023
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Condition or disease | Intervention/treatment | Phase |
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Squamous Cell Carcinoma of Head and Neck | Drug: Pembrolizumab Drug: Carboplatin Drug: Paclitaxel | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 101 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Phase 4, Single-arm, Open-label Clinical Study of Pembrolizumab (MK-3475) to Evaluate the Efficacy and Safety of MK-3475 Plus Carboplatin and Paclitaxel as First-line Treatment of Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (KEYNOTE B10). |
Actual Study Start Date : | October 27, 2020 |
Actual Primary Completion Date : | February 20, 2023 |
Estimated Study Completion Date : | July 25, 2024 |

Arm | Intervention/treatment |
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Experimental: Pembrolizumab + Carboplatin + Paclitaxel
Participants will receive pembrolizumab plus carboplatin plus paclitaxel. Pembrolizumab will be administered via intravenous (IV) infusion at a dose of 200 mg on Day 1 of each 21-day cycle for up to 35 cycles (up to ~2 years). Carboplatin will be administered via IV infusion at area under curve (AUC) 5 mg/mL/minute on Day 1 of each 21-day cycle for up to 6 cycles (up to ~4 months). At investigator's choice, paclitaxel will be administered via IV infusion at a dose of 100 mg/m^2 on Day 1 and Day 8 of each 21-day cycle for up to 6 cycles (up to ~4 months) or at a dose of 175 mg/m^2 on Day 1 of each 21-day cycle for up to 6 cycles (up to ~4 months).
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Drug: Pembrolizumab
Pembrolizumab 200 mg IV infusion given on Day 1 of each 21-day cycle
Other Names:
Drug: Carboplatin Carboplatin AUC 5 mg/mL/minute IV infusion given on Day 1 of each 21-day cycle
Other Name: PARAPLATIN® Drug: Paclitaxel At investigator's choice, paclitaxel 100 mg/m^2 IV infusion given on Day 1 and Day 8 of each 21-day cycle or paclitaxel 175 mg/m^2 IV infusion given on Day 1 of each 21-day cycle
Other Names:
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- Objective Response Rate (ORR) [ Time Frame: Up to ~20 months ]ORR is defined as the percentage of participants who have a Complete Response (CR: Disappearance of all target lesions) or a Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters) per Response Evaluation Criteria in Solid Tumors Update and Clarification 1.1 (RECIST 1.1) which has been adjusted for this study to include a maximum of 10 target lesions and a maximum of 5 target lesions per organ. The percentage of participants who experience a CR or PR as assessed by blinded independent central review based on RECIST 1.1 will be presented.
- Duration of Response (DOR) [ Time Frame: Up to ~47 months ]For participants who demonstrate a confirmed Complete Response (CR: Disappearance of all target lesions) or confirmed Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum of diameters) per RECIST 1.1, DOR is defined as the time from first documented evidence of CR or PR until disease progression or death due to any cause, whichever occurs first. RECIST 1.1 has been adjusted for this study to include a maximum of 10 target lesions and a maximum of 5 target lesions per organ. The DOR as assessed by blinded independent central review based on RECIST 1.1 will be presented.
- Progression-free Survival (PFS) [ Time Frame: Up to ~47 months ]PFS is defined as the time from first dose of study treatment to the first documented progressive disease (PD) or death due to any cause, whichever occurs first. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD. RECIST 1.1 has been adjusted for this study to include a maximum of 10 target lesions and a maximum of 5 target lesions per organ. PFS as assessed by blinded independent central review based on RECIST 1.1 will be presented.
- Overall Survival (OS) [ Time Frame: Up to ~47 months ]OS is defined as the time from first dose of study treatment to death due to any cause.
- Percentage of Participants who Experience an Adverse Event (AE) [ Time Frame: Up to ~27 months ]An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The percentage of participants who experience an AE will be reported.
- Percentage of Participants who Discontinue Study Treatment due to an AE [ Time Frame: Up to ~24 months ]An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The percentage of participants who discontinue study treatment due to an AE will be reported.

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:
- Has histologically or cytologically-confirmed diagnosis of R/M HNSCC that is considered incurable by local therapies
- Male participants refrain from donating sperm plus are abstinent from heterosexual intercourse or agree to use contraception during the intervention period and for at least 95 days after carboplatin/paclitaxel
- Female participants are not pregnant or breastfeeding and are either not a woman of child-bearing potential (WOCBP) or use a contraceptive method that is highly effective or are abstinent from heterosexual intercourse during the intervention period and for at least 120 days after pembrolizumab or 30 days after paclitaxel or 6 months after carboplatin whichever occurs last, and agree not to donate or freeze eggs during this period
- Has adequate organ function
Exclusion Criteria:
- Has disease that is suitable for local therapy administered with curative intent
- Has a life expectancy of less than 3 months and/or has rapidly progressive disease
- Has a diagnosed and/or treated additional malignancy within 5 years prior to allocation with the exception of curatively treated basal cell carcinoma of the skin, squamous cell carcinoma of the skin, curatively resected in situ cervical cancer and curatively resected in situ breast cancer
- Has received a live or live-attenuated vaccine within 30 days prior to the first dose of study intervention
- Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of study intervention
- Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis
- Has a history of or current non-infectious pneumonitis/interstitial lung disease that requires steroids
- Has an active infection requiring systemic therapy
- Has a known history of human immunodeficiency virus (HIV) infection
- Has a known history of Hepatitis B or Hepatitis C virus infection
- Has had an allogenic tissue/solid organ transplant

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): NCT04489888

Study Director: | Medical Director | Merck Sharp & Dohme LLC |
Responsible Party: | Merck Sharp & Dohme LLC |
ClinicalTrials.gov Identifier: | NCT04489888 |
Other Study ID Numbers: |
3475-B10 MK-3475-B10 ( Other Identifier: Merck ) |
First Posted: | July 28, 2020 Key Record Dates |
Last Update Posted: | March 29, 2023 |
Last Verified: | March 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf |
URL: | http://engagezone.msd.com/ds_documentation.php |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Programmed Cell Death-1 (PD1, PD-1) Programmed Death-Ligand 1 (PDL1, PD-L1) |
Carcinoma Carcinoma, Squamous Cell Squamous Cell Carcinoma of Head and Neck Neoplasms, Glandular and Epithelial Neoplasms by Histologic Type Neoplasms Neoplasms, Squamous Cell Head and Neck Neoplasms Neoplasms by Site Paclitaxel |
Carboplatin Pembrolizumab Antineoplastic Agents, Phytogenic Antineoplastic Agents Tubulin Modulators Antimitotic Agents Mitosis Modulators Molecular Mechanisms of Pharmacological Action Antineoplastic Agents, Immunological Immune Checkpoint Inhibitors |