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INBRX-109

Phase 2

Conventional Chondrosarcoma | Small molecule | Oncology |Inhibrx Biosciences, Inc.|Last Updated: Jul 14, 2026

Target and mechanism

Molecular targetDR5
Target classDeath Receptor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment206

FDA Designations

No designations recorded

Clinical trial landscape

INBRX-109 · 2 trials · 3 indications

Phase 2 1Phase 1 1
NCT04950075Study of INBRX-109 in Conventional ChondrosarcomaConventional Chondrosarcoma
ACTIVE NOT_RECRUITING206 Analytics
PHASE2ACTIVE NOT_RECRUITING
Study of INBRX-109 in Conventional Chondrosarcoma
Conventional ChondrosarcomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-free survival per RECISTv1.1 by real time IRR comparing INBRX-109 and placebo
3 years

Progression-free survival per RECISTv1.1 will be determined.

Frequency and severity of adverse events of INBRX-109
Up to 8 years

Adverse events will be assessed and severity assigned by using the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0.

Evaluating Tumor Response for colorectal cancers and Ewing sarcoma
Up to 8 years

Evaluating how the tumor responds to treatment by measuring the number of patients with colorectal cancer and Ewing sarcoma that experience tumor shrinkage and for how long.

Secondary Endpoints

Overall survival of patients comparing INBRX-109 and placebo
3 years
ORR per RECISTv1.1 by real-time IRR.
3 years
PFS per RECISTv1.1 by Investigator assessment
3 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
INBRX-109EXPERIMENTALIV every three weeks
PlaceboPLACEBO_COMPARATORIV every three weeks
Dose Escalation (Complete)EXPERIMENTALINBRX-109 will be escalated (3+3 design) in subjects with locally advanced or metastatic solid tumors including sarcomas.
Expansion Malignant Pleural Mesothelioma (Complete)EXPERIMENTALSubjects with malignant pleural mesothelioma will be treated with single-agent INBRX-109 at either the MTD or RP2D.
Expansion Gastric Adenocarcinoma (Complete)EXPERIMENTALSubjects with gastric adenocarcinoma will be treated with single-agent INBRX-109 at either the MTD or RP2D.
Expansion Colorectal Adenocarcinoma (Complete)EXPERIMENTALSubjects with colorectal (CRC) adenocarcinoma will be treated with single-agent INBRX-109 at either the MTD or RP2D.
Expansion Sarcomas (Complete)EXPERIMENTALSubjects with certain sarcoma subtypes will be treated with single-agent INBRX-109 at either the MTD or RP2D.
Combination Expansion Malignant Pleural Mesothelioma (Complete)EXPERIMENTALSubjects with malignant pleural mesothelioma will be treated with INBRX-109 in combination with chemotherapies (carboplatin, cisplatin, carboplatin and pemetrexed, or cisplatin and pemetrexed)
Combination Expansion Pancreatic Adenocarcinoma (Complete)EXPERIMENTALSubjects with pancreatic adenocarcinoma will be treated with INBRX-109 in combination with 5FU/irinotecan based chemotherapy
Combination Expansion Adult Ewing SarcomaEXPERIMENTALAdult subjects with Ewing Sarcoma will be treated with INBRX-109 in combination with irinotecan and temozolomide
Combination Expansion Colorectal Adenocarcinoma (Complete)EXPERIMENTALSubjects with colorectal adenocarcinoma will be treated with INBRX-109 in combination with FOLFIRI based chemotherapy
Expansion Solid Tumors (Complete)EXPERIMENTALSubjects with Solid tumors and high BMI will be treated with single-agent INBRX-109 at either the MTD or RP2D.
Combination Expansion SDH-deficient solid tumors or GIST (Complete)EXPERIMENTALSubjects with SDH-deficient solid tumors or GIST will be treated with INBRX-109 in combination with temozolomide
Combination Expansion Colorectal Adenocarcinoma patients with FOLFIRI plus bevacizumabEXPERIMENTALColorectal adenocarcinoma will be treated with INBRX-109 with FOLFIRI (FU, leucovorin, and irinotecan) plus bevacizumab
Combination Expansion Colorectal Adenocarcinoma with FTD/TPI plus bevacizumabEXPERIMENTALColorectal adenocarcinoma will be treated with INBRX-109 with FTD/TPI plus bevacizumab
Combination Expansion Adolescent Ewing SarcomaEXPERIMENTALAdolescent (12 to \<18) subjects with Ewing Sarcoma will be treated with INBRX-109 in combination with irinotecan and temozolomide

Interventions

NameTypeDescription
INBRX-109DRUGTetravalent DR5 Agonist Antibody
PlaceboDRUGPlacebo
IrinotecanDRUGChemotherapy
TemozolomideDRUGChemotherapy
carboplatinDRUGchemotherapy
pemetrexedDRUGchemotherapy
LeucovorinDRUGchemotherapy
FluorouracilDRUGchemotherapy
BevacizumabDRUGtargeted therapy
Trifluridine + TipiracilDRUGchemotherapy
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Eligibility Criteria

Age Range18 Years to 85 Years
SexALL
Healthy VolunteersNo
Study Sites68

Inclusion Criteria: 1. Conventional chondrosarcoma, unresectable (=inoperable) or metastatic. 2. Measurable disease by RECISTv1.1. Note: Tumor lesions located in a previously irradiated (or other locally treated) area will be considered measurable, provided there has been clear imaging-based progre...

Countries:United StatesAustraliaFranceGermanyIrelandItalyNetherlandsSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWJul 14, 2026NCT04950075lastUpdatePostDate: changed
LOWJul 14, 2026NCT04950075lastUpdatePostDate: changed

Frequently asked questions about INBRX-109

What is INBRX-109 used for?

INBRX-109 is an investigational small molecule being studied for the treatment of conventional chondrosarcoma and Ewing sarcoma. It is currently in Phase 2 clinical development for these oncology indications.

What does INBRX-109 target?

INBRX-109 targets DR5, a death receptor. By engaging this receptor, the drug is designed to induce apoptosis in cancer cells. This mechanism is being evaluated in clinical trials for sarcomas.

Who is developing INBRX-109?

INBRX-109 is being developed by Inhibrx Biosciences, Inc., a biopharmaceutical company. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with certain sarcomas.

What phase is INBRX-109 in?

INBRX-109 is in Phase 2 clinical development. It is being studied in a Phase 2 trial for conventional chondrosarcoma, following a Phase 1 trial that included patients with Ewing sarcoma and other solid tumors.

What clinical trials is INBRX-109 in?

INBRX-109 is being evaluated in two clinical trials. NCT03715933 is a Phase 1 study in solid tumors including sarcomas, and NCT04950075 is a Phase 2 study specifically in conventional chondrosarcoma. Both trials are actively enrolling or ongoing.

Is INBRX-109 FDA approved?

INBRX-109 is not FDA approved. It is an investigational drug currently in clinical development, with active trials in Phase 1 and Phase 2 for sarcoma indications. Approval status has not been granted.