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Darlifarnib

Phase 1

Solid Tumors With HRAS Alterations | Small molecule | Oncology |Kura Oncology, Inc.|Last Updated: Jun 8, 2026

Target and mechanism

Molecular targetHRAS
Target class-Nib (Kinase)
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment300

FDA Designations

No designations recorded

Clinical trial landscape

Darlifarnib · 1 trial · 7 indications

Phase 1 1
NCT06026410KO-2806 Monotherapy and Combination Therapies in Advanced Solid TumorsSolid Tumors With HRAS Alterations
RECRUITING300 Analytics
PHASE1RECRUITING
KO-2806 Monotherapy and Combination Therapies in Advanced Solid Tumors
Solid Tumors With HRAS AlterationsUnlock trial analytics

Study Endpoints

Primary Endpoints

Rate of dose-limiting toxicities (DLTs)
DLTs will be evaluated during the first 28 days of KO-2806 treatment (dose escalation)
Descriptive statistics of adverse events (AEs)
First dose of KO-2806 up to and including 28 days after last dose of KO-2806 (dose escalation)

NCI-CTCAE v5.0

Incidence of dose interruptions, reductions, and discontinuations due to AE
First dose of KO-2806 up to last dose of KO-2806 or up to 24 months of treatment (dose escalation)
Objective Response Rate (ORR)
Up to an estimated period of 24 months (dose expansion)

Assessed per RECIST v1.1

Secondary Endpoints

Incidence of dose interruptions, reductions, and discontinuations due to AE
First dose of KO-2806 up to last dose of KO-2806 or up to 24 months of treatment (dose expansion)
Descriptive statistics of AEs
First dose of KO-2806 up to and including 28 days after last dose of KO-2806 (dose expansion)
Objective Response Rate (ORR)
Up to an estimated period of 24 months (dose escalation)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm #1: RAS-altered advanced solid tumors, monotherapy (escalation phase)EXPERIMENTALPatients with advanced solid tumors and the following: * HRAS-mutant and/or amplified tumors (any solid tumor type) * HRAS overexpression (only for HNSCC tumors) * KRAS and/or NRAS and/or HRAS-mutant and/or amplified for NSCLC or CRC * KRAS-mutant and/or amplified PDAC
Arm #2: Advanced or metastatic RCC, combination therapy (escalation phase)EXPERIMENTALPatients who have received at least 1 prior systemic therapy with immuno-oncology (IO)-based treatment for locally advanced or metastatic RCC with predominantly clear cell subtype; non-clear cell RCC patients who are either treatment naïve or have received any prior systemic treatment for locally advanced and metastatic RCC
Arm #3: Advanced or metastatic NSCLC, CRC, or PDAC, combination therapy (escalation phase)EXPERIMENTALPatients with KRAS G12C-mutant locally advanced or metastatic NSCLC, CRC, or PDAC who have received at least 1 prior systemic therapy including available approved standard of care treatments
Arm #4: Advanced or metastatic ccRCC, combination therapy (expansion phase)EXPERIMENTALPatients must be cabozantinib-naïve and have received at least 1 prior systemic therapy with IO-based treatment for locally advanced or metastatic ccRCC
Arm #5: Advanced or metastatic ccRCC, monotherapy (expansion phase)EXPERIMENTALPatients must be cabozantinib-naïve and have received at least 1 prior systemic therapy with IO-based treatment for locally advanced or metastatic ccRCC
Arm #6: Advanced or metastatic ccRCC, cabozantinib rollover to combination therapy (expansion phase)EXPERIMENTALPatients must be cabozantinib-naïve and have received at least 1 prior systemic therapy with IO-based treatment for locally advanced or metastatic ccRCC
Arm #7: Advanced or metastatic NSCLC, combination therapy (expansion phase)EXPERIMENTALPatients with KRAS G12C-mutant locally advanced or metastatic NSCLC who have received at least 1 prior systemic therapy including available approved standard of care treatments

Interventions

NameTypeDescription
DarlifarnibDRUGOral administration
CabozantinibDRUGOral administration
AdagrasibDRUGOral administration
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites38

Inclusion Criteria: * At least 18 years of age. * Histologically or cytologically confirmed advanced solid tumors * Arm #1 (KO-2806 monotherapy): Patients who have progressed on, or are refractory to, standard of care (SOC) treatments with advanced solid tumors, specifically: HRAS-mutant and/or ...

Countries:United StatesFranceGermanyItalySpain
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Frequently asked questions about Darlifarnib

What is Darlifarnib used for?

Darlifarnib is an investigational small molecule being developed for the treatment of solid tumors with HRAS alterations. It is currently in Phase 1 clinical development and has not been approved by the FDA. The drug is being studied in patients with advanced solid tumors that harbor HRAS mutations.

What does Darlifarnib target?

Darlifarnib targets HRAS, a protein involved in cell growth and division. As a kinase inhibitor, it is designed to interfere with HRAS signaling pathways that can drive tumor growth. This makes it a potential therapeutic option for cancers with HRAS alterations.

Who makes Darlifarnib?

Darlifarnib is being developed by Kura Oncology, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol KURA. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with advanced solid tumors.

What phase is Darlifarnib in?

Darlifarnib is currently in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved by regulatory authorities. The ongoing Phase 1 trial is actively recruiting participants to assess the drug's safety, tolerability, and preliminary efficacy.

What clinical trials is Darlifarnib in?

Darlifarnib is being evaluated in a Phase 1 clinical trial with the identifier NCT06026410. This study, titled 'KO-2806 Monotherapy and Combination Therapies in Advanced Solid Tumors,' is recruiting 300 participants across the United States, France, Germany, Italy, and Spain. The trial is open to adults aged 18 and older.

Is Darlifarnib the same as KO-2806?

Yes, Darlifarnib is also known as KO-2806. The clinical trial NCT06026410, which evaluates Darlifarnib, is titled 'KO-2806 Monotherapy and Combination Therapies in Advanced Solid Tumors,' confirming that both names refer to the same investigational drug.