Study of INBRX-106 and INBRX-106 in Combination With Pembrolizumab (Keytruda®) in Subjects With Locally Advanced or Metastatic Solid Tumors (Hexavalent OX40 Agonist)
An Open-Label, Multicenter, First-in-Human, Dose-Escalation, Multicohort, Phase 1/2 Study of INBRX-106 and INBRX-106 in Combination With Pembrolizumab in Subjects With Locally Advanced or Metastatic Solid Tumors
2 other identifiers
interventional
296
4 countries
42
Brief Summary
This is a Phase 1/2, open-label, non-randomized, 4-part trial to determine the safety profile and identify the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D) of INBRX 106 administered as a single agent or in combination with the anti-PD-1 checkpoint inhibitor (CPI) pembrolizumab (Keytruda®). KEYTRUDA is a registered trademark of Merck Sharp \& Dohme LLC, a subsidiary of Merck \& Co., Inc., Rahway, NJ, USA.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_1
Started Dec 2019
Longer than P75 for phase_1
42 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
Study Start
First participant enrolled
December 10, 2019
CompletedFirst Submitted
Initial submission to the registry
December 11, 2019
CompletedFirst Posted
Study publicly available on registry
December 13, 2019
CompletedPrimary Completion
Last participant's last visit for primary outcome
October 30, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
May 12, 2027
December 18, 2025
December 1, 2025
6.9 years
December 11, 2019
December 17, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (5)
Frequency of adverse events of INBRX-106 as single agent and in combination with pembrolizumab
Adverse events will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0
~2 years
Severity of adverse events of INBRX-106 as single agent and in combination with pembrolizumab
Adverse events will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0
~2 years
MTD and/or RP2D of INBRX-106 as single agent and in combination with pembrolizumab
Maximum Tolerated Dose (MTD) and/or Recommended Phase 2 Dose (RP2D) of INBRX-106 and INBRX-106 in combination with pembrolizumab
~2 years
Antitumor activity of INBRX-106 in combination with pembrolizumab in expansion cohorts
Tumor response will be determined by immune Response Evaluation Criteria in Solid Tumors (iRECIST).
~2 years
Frequency and severity of adverse events of INBRX-106 in combination with pembrolizumab and chemotherapy in adults with locally advanced or metastatic NSCLC
Adverse events will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0
~2 years
Secondary Outcomes (5)
Area under the serum concentration time curve (AUC) of INBRX-106
~2 years
Maximum observed serum concentration (Cmax) of INBRX-106
~2 years
Trough observed serum concentration (Ctrough) of INBRX-106
~2 years
Time to Cmax (Tmax) of INBRX-106
~2 years
Immunogenicity of INBRX-106
~2 years
Other Outcomes (2)
Anti-tumor activity of INBRX-106 as single agent and in combination with pembrolizumab with or without chemotherapy
~2 years
Anti-tumor activity of INBRX-106 as single agent and in combination with pembrolizumab with or without chemotherapy
~2 years
Study Arms (14)
Part 1 INBRX-106 Escalation (Not Recruiting)
EXPERIMENTALINBRX-106 will be escalated in subjects with locally advanced or metastatic solid tumors.
Part 3 INBRX-106 Escalation in Combination with pembrolizumab (Not Recruiting)
EXPERIMENTALINBRX-106 will be escalated, in combination with pembrolizumab, in subjects with locally advanced or metastatic solid tumors.
Part 2 (Cohorts C1/C2) INBRX-106 Escalation in Various Solid Tumor Types (Not Recruiting)
EXPERIMENTALSubjects with melanoma (any type), head and neck squamous cell carcinoma, renal cell carcinoma, urothelial carcinoma or MSI/TMB-high tumors that are relapsed or refractory to prior checkpoint inhibitor (CPI) therapy will be treated with INBRX-106
Part 2 (Cohort C3) INBRX-106 Escalation in NSCLC (Not Recruiting)
EXPERIMENTALSubjects with non-small cell carcinoma relapsed or refractory to prior checkpoint inhibitor (CPI) therapy will be treated with INBRX-106
Part 4 (Cohort F3a) INBRX-106 Expansion in Combination with pembrolizumab in NSCLC (Not Recruiting)
EXPERIMENTALSubjects with non-small cell lung cancer will be treated with alternating dosing of INBRX-106 0.3 mg/kg Q6W and 400 mg pembrolizumab IV Q6W. This is one of the randomized cohorts.
Part 4 (Cohort F3b) INBRX-106 Expansion in Combination with pembrolizumab in NSCLC (Not Recruiting)
EXPERIMENTALSubjects with non-small cell lung cancer will be given a 0.3 mg/kg priming dose of INBRX-106 in cycle 1, followed by 0.1 mg/kg INBRX-106 and 200 mg pembrolizumab IV every 3 weeks in subsequent cycles. This is one of the randomized cohorts.
Part 4 (Cohort F3c) Pembrolizumab Expansion Arm (Not Recruiting)
ACTIVE COMPARATORSubjects with non-small cell lung cancer will be treated with 200 mg pembrolizumab IV every 3 weeks. This is one of the randomized cohorts.
Part 4 (Cohort F3d) INBRX-106 Expansion in Combination with pembrolizumab in NSCLC (concurrent)
EXPERIMENTALSubjects with non-small cell lung cancer will be treated concurrently every 6 weeks with INBRX-106 0.1 mg/kg and 200 mg pembrolizumab IV every 3 weeks. This is one of the randomized cohorts.
Part 4 (Cohort F4) INBRX-106 Expansion in Combination with pembrolizumab
EXPERIMENTALSubjects with melanoma (any type), head and neck squamous cell carcinoma (non-nasopharyngeal) OR nasopharyngeal carcinoma, MSI-high, TMB-high or MMR-deficient tumors, will be treated with INBRX-106 in combination with 200mg pembrolizumab IV every 3 weeks. Only NPC is currently enrolling.
Part 4 (Cohort F5)INBRX-106 Expansion with pembrolizumab in MSI/TMB-high/MMRd tumors Not Recuriting
EXPERIMENTALSubjects with solid tumors that have confirmed MSI-high, TMB-high or MMR-deficient states who are relapsed or refractory to checkpoint inhibitor (CPI) therapy will be treated with INBRX-106 and 200 mg pembrolizumab IV every 3 weeks
Part 4 (Cohort F6) INBRX-106 Expansion with pembrolizumab in Uveal Melanoma (Not Recruiting)
EXPERIMENTALSubjects with ocular (uveal) melanoma who are relapsed or refractory to checkpoint inhibitor (CPI) therapy will be treated with INBRX-106 and 200 mg pembrolizumab IV every 3 weeks
Part 4 (Cohort F7a) INBRX-106 Expansion with pembrolizumab, pemetrexed and carboplatin in NSCLC
EXPERIMENTALThis Arm is no longer recruiting. Subjects with advanced/metastatic NSCLC, any PD-L1 TPS will be treated with INBRX-106 0.1mg/kg, 200mg pembrolizumab, 500mg/m2 pemetrexed and carboplatin AUC-5 IV every 3 weeks
Part 4 (Cohort F7b) INBRX-106 Expansion with pembrolizumab, pemetrexed and cisplatin in NSCLC
EXPERIMENTALThis Arm is no longer recruiting. Subjects with advanced/metastatic NSCLC, any PD-L1 TPS will be treated with INBRX-106 0.1mg/kg, 200mg pembrolizumab, 500mg/m2 pemetrexed and 75mg/m2 cisplatin IV every 3 weeks
Part 4(Cohort F7c)INBRX-106 Expansion with pembrolizumab, (Nab)-paclitaxel and carboplatin in NSCLC
EXPERIMENTALThis Arm is no longer recruiting. Subjects with advanced/metastatic NSCLC, any PD-L1 TPS will be treated with INBRX-106 0.1mg/kg, 200mg pembrolizumab, 200mg/m2 paclitaxel and carboplatin AUC-6 IV every 3 weeks OR INBRX-106, 200mg pembrolizumab, 100mg/m2 nab-paclitaxel (dosed Days 1,8 and 15 every cycle) and carboplatin AUC-6 IV every 3 weeks. Treating physician to determine if paclitaxel or nab-paclitaxel will be given
Interventions
pembrolizumab 200 mg by intravenous (IV) infusion, given on Day 1 of each 21-day cycle.
pembrolizumab 400 mg by IV infusion given on Day 1 of alternating 21-day cycles (every 6 weeks)
The active ingredient of INBRX-106 is a recombinant, humanized, hexavalent IgG antibody that targets the human OX40 receptor (TNFRSF4).
carboplatin AUC-5 by intravenous (IV) infusion, given on Day 1 of each 21-day cycle of cycles 1-4
carboplatin AUC-6 by intravenous (IV) infusion, given on Day 1 of each 21-day cycle of cycles 1-4
pemetrexed 500 mg/m2 by IV infusion given on Day 1 of each 21-Day cycle for up to 35 cycles
cisplatin 75mg/m2 by intravenous (IV) infusion, given on Day 1 of each 21-day cycle of cycles 1-4
paclitaxel 200mg/m2 by intravenous (IV) infusion, given on Day 1 of each 21-day cycle of cycles 1-4
Nab paclitaxel 100mg/m2 by intravenous (IV) infusion, given on Days 1, 8 and 15 of each 21-day cycle of cycles 1-4
Eligibility Criteria
You may qualify if:
- Males or females aged ≥18 years.
- Parts 1 and 3 (escalation cohorts): Subjects with locally advanced or metastatic non resectable solid tumors, whose disease has progressed despite all standard therapies or for whom no further standard or clinically acceptable therapy exists.
- Part 2 (single-agent expansion cohort): Subjects with NSCLC, melanoma, HNSCC, G/GEA, RCC, or TCC, with histologically confirmed, locally advanced or metastatic, non-resectable disease, which has progressed despite all standard therapies including CPI or for whom no standard or clinically acceptable therapy exists.
- Part 4 (expansion cohorts in combination with pembrolizumab, with or without chemotherapy): Subjects with melanoma (all types), HNSCC, G/GEA, RCC, TCC, NSCLC, or MSI-high, TMB-high, MMR-deficient tumors, with histologically confirmed, locally advanced or metastatic, non resectable disease, which is either CPI-naive (melanoma, HNSCC, NPC) or progressed despite all standard therapies including CPI (NSCLC, RCC, TCC, uveal melanoma, MSI-high, TMB-high, or MMR-deficient solid tumors) or for whom no standard or clinically acceptable therapy exists.
- For Cohort F3 (NSCLC), subjects may have progressed on no more than 2 lines of standard therapy that must include at least one PD-1/L1 regimen.
- For Cohort F4 (HNSCC and NPC), subjects may be previously treated with no more than 1 prior chemotherapy regimen in metastatic setting. Prior PD-1/L1 in curative (neo-adjuvant/adjuvant) setting is allowed only if completed \>/= 6 months prior to progression to local recurrence or metastatic disease.
- All subjects with non-squamous NSCLC must have documentation of absence of tumor activating EGFR mutations and absence of ALK gene rearrangements.
- PD-L1 by IHC (22C3): Parts 1 and 3: IHC optional. Part 2: IHC result mandatory but any score allowed. Combined Positive Score (CPS) ≥ 1% (or Tumor Proportion Score ≥50% for NSCLC; for TMB-high tumors, any TPS% is allowed). Part 4: Combined Positive Score (CPS) ≥ 1% (or Tumor Proportion Score ≥50% for NSCLC; for TMB-high tumors, any TPS% is allowed).
- Adequate hematologic, coagulation, hepatic and renal function and ECOG score as defined per protocol.
You may not qualify if:
- Prior exposure to OX40 agonists.
- Receipt of any investigational product or any approved anticancer drug(s) or biological product(s) within 4 weeks prior to the first dose of study drug with certain exceptions.
- Hematologic malignancies (e.g., ALL, AML, MDS, CLL, CML, NHL, Hodgkin's lymphoma and multiple myeloma)
- Prior or concurrent malignancies. Exception: Subjects with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessments of INBRX-106.
- Known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Exception: Subjects who are previously treated and are radiologically and clinically stable without the requirement for steroid treatment for at least 14 days prior to first dose of study treatment may be allowed study entry if certain criteria apply.
- Grade ≥ 3 immune-related adverse events (irAEs) or irAE that lead to discontinuation of prior immunotherapy. Some exceptions as defined per protocol apply.
- Active autoimmune disease or documented history of autoimmune disease that required systemic steroids or other immunosuppressive medications. Certain exceptions as defined in protocol apply.
- Diagnosis of immunodeficiency or treatment with systemic immunosuppressive medications within 7 days prior to the first dose of study drug. Certain exceptions as defined in protocol apply.
- History of hepatitis B, hepatitis C, or human immunodeficiency virus (HIV) infection. Exceptions as defined in protocol apply.
- Active interstitial lung disease (ILD) or pneumonitis or a history of ILD or pneumonitis requiring treatment with steroids or other immunosuppressive medications.
- Clinically significant cardiac condition, including myocardial infarction, uncontrolled angina, cerebrovascular accident, or other acute uncontrolled heart disease \< 3 months; left ventricular ejection fraction (LVEF) \< 50%; New York Heart Association (NYHA) Class III or IV congestive heart failure; or uncontrolled hypertension; or oxygen saturation \<92% on room air.
- Active, hemodynamically significant pulmonary embolism within 3 months prior to enrollment on this trial.
- Major surgery within 4 weeks prior to enrollment on this trial.
- Anti-infectious drug treatments (i.e., antibiotics) within 4 weeks prior to the first dose of study drug.
- Prior organ allograft transplantations or allogeneic peripheral blood stem cell (PBSC) or bone marrow (BM) transplantation.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Inhibrx Biosciences, Inclead
- Merck Sharp & Dohme LLCcollaborator
Study Sites (42)
City of Hope
Duarte, California, 91010, United States
Los Angeles Cancer Network
Glendale, California, 91204, United States
California Research Institute
Los Angeles, California, 90027, United States
Valkyrie Clinical Trials
Los Angeles, California, 90069, United States
Valkyrie Clinical Trials
Murrieta, California, 92562, United States
Providence Medical Foundation
Santa Rosa, California, 95403, United States
Clermont Oncology Center
Clermont, Florida, 34711, United States
Mid Florida Hematology and Oncology Center
Orange City, Florida, 32763, United States
Winship Cancer Institute - Emory University
Atlanta, Georgia, 30322, United States
The University of Chicago Medical Center
Chicago, Illinois, 60637, United States
University of Iowa
Iowa City, Iowa, 52242, United States
Norton Cancer Institute
Louisville, Kentucky, 40202, United States
Barbara Ann Karmanos Cancer Institute
Detroit, Michigan, 48201, United States
Henry Ford Cancer Institute
Detroit, Michigan, 48202, United States
START Midwest
Grand Rapids, Michigan, 49546, United States
HealthPartners Cancer Research Center
Saint Louis Park, Minnesota, 55426, United States
HealthPartners Cancer Research Center (Regions Hospital)
Saint Paul, Minnesota, 55101, United States
Intermountain Health Cancer Centers of Montana
Billings, Montana, 59102, United States
Nebraska Cancer Specialists
Omaha, Nebraska, 68130, United States
Montefiore Medical Center
The Bronx, New York, 10467, United States
Cleveland Clinic
Cleveland, Ohio, 44195, United States
Providence Portland Medical Center
Portland, Oregon, 97213, United States
Vanderbilt University School of Medicine
Nashville, Tennessee, 37204, United States
Sarah Cannon Research Institute at Mary Crowley
Dallas, Texas, 75230, United States
Renovatio Clinical - El Paso
El Paso, Texas, 79915, United States
NEXT Oncology
San Antonio, Texas, 78229, United States
Renovatio Clinical
The Woodlands, Texas, 77380, United States
The University of Texas Health Science Center at Tyler
Tyler, Texas, 75701, United States
Virginia Cancer Specialists
Fairfax, Virginia, 22031, United States
Froedtert Hospital and the Medical College of Wisconsin
Milwaukee, Wisconsin, 53226, United States
Curie Oncology
Singapore, Singapore
Icon Cancer Centre Farrer Park
Singapore, Singapore
Icon Cancer Centre Mount Alvernia
Singapore, Singapore
The Catholic University of Korea, St. Vincent's Hospital
Gyeonggi-do, South Korea
Asan Medical Center
Seoul, South Korea
Severance Hospital, Yonsei University Health System
Seoul, South Korea
The Catholic University of Korea Seoul St. Mary's Hospital,
Seoul, South Korea
Changhua Christian Hospital (CCH)
Changhua, Taiwan
E-Da Cancer Hospital
Kaohsiung City, Taiwan
Kaohsiung Medical University Chung-Ho Memorial Hospital (KMUH)
Kaohsiung City, Taiwan
National Cheng Kung University Hospital
Tainan, Taiwan
Taipei Veterans General Hospital
Taipei, Taiwan
Related Publications (1)
Holay N, Yadav R, Ahn SJ, Kasiewicz MJ, Polovina A, Rolig AS, Staebler T, Becklund B, Simons ND, Koguchi Y, Eckelman BP, de Durana YD, Redmond WL. INBRX-106: a hexavalent OX40 agonist that drives superior antitumor responses via optimized receptor clustering. J Immunother Cancer. 2025 May 21;13(5):e011524. doi: 10.1136/jitc-2025-011524.
PMID: 40404202DERIVED
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Officials
- STUDY DIRECTOR
Clinical Lead
Inhibrx Biosciences, Inc
Study Design
- Study Type
- interventional
- Phase
- phase 1
- Allocation
- RANDOMIZED
- Masking
- NONE
- Masking Details
- Part 4 NSCLC cohort is randomized 1;1:1, open-label
- Purpose
- TREATMENT
- Intervention Model
- SEQUENTIAL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
December 11, 2019
First Posted
December 13, 2019
Study Start
December 10, 2019
Primary Completion (Estimated)
October 30, 2026
Study Completion (Estimated)
May 12, 2027
Last Updated
December 18, 2025
Record last verified: 2025-12
Data Sharing
- IPD Sharing
- Will not share