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RP-6306

Phase 2

Advanced Cancer | Small molecule | Oncology |Repare Therapeutics Inc.|Trials Updated: Feb 6, 2026

RP-6306 development status

Highest phase Phase 2
Registered trials 1 across 1 sponsor since Nov 2001

RP-6306 target and mechanism

Molecular targetWEE1
Target classKinase
ModalitySmall molecule

Also known as Lunresertib

Success Probability

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Market & Valuation

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Trial Design

ACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment28

FDA Designations

No designations recorded

RP-6306 clinical trials

RP-6306 · 1 trial · 1 indication

Phase 2 1
NCT05605509RP-6306 in Patients With Advanced CancerAdvanced Cancer
COMPLETED28 Analytics
PHASE2COMPLETED
RP-6306 in Patients With Advanced Cancer
Advanced CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Response rate of RP-6306 in patients with selected cancers receiving standard agent
2 years

Secondary Endpoints

Number and severity of adverse events
2 years
Explore the recommended dose of RP-6306
2 years
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
RP-6306 + GemcitabineACTIVE_COMPARATOR -
RP-6306 + FOLFIRIACTIVE_COMPARATOR -
RP-6306 + TrastuzumabACTIVE_COMPARATOR -
RP-6306 + RP-3500ACTIVE_COMPARATOR -

Interventions

NameTypeDescription
RP-6306DRUGDose and schedule will be assigned at enrolment
GemcitabineDRUGDose and schedule will be assigned at enrolment
FOLFIRI ProtocolDRUGIrinotecan Leucovorin FU
TrastuzumabDRUGstandard doses q3weekly
RP-3500DRUGDose and schedule will be assigned at enrolment
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Patients must have histologically confirmed cancer, that is advanced/metastatic/recurrent or unresectable, for which no curative therapy exists, and be eligible for one or more of the open cohorts * All patients must have a formalin fixed paraffin embedded tissue block (from p...

Countries:Canada
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Competitive Landscape -Cancer 7 trials (matched to "Advanced Cancer")

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Frequently asked questions about RP-6306

What is RP-6306?

RP-6306 is an investigational small molecule drug being developed by Repare Therapeutics Inc. for the treatment of advanced cancer. It is a biomarker-selected therapy, meaning it is studied in patients whose tumors carry specific molecular features. RP-6306 is currently in Phase 2 clinical development and has not been approved by the FDA.

What does RP-6306 target?

RP-6306 targets WEE1, a kinase enzyme involved in regulating the cell cycle and DNA damage response. By inhibiting WEE1, RP-6306 is designed to interfere with how cancer cells manage DNA damage and cell division. WEE1 inhibition is being explored as a strategy in biomarker-selected advanced cancers.

Who makes RP-6306?

RP-6306 is being developed by Repare Therapeutics Inc., a clinical-stage precision oncology company. Repare Therapeutics trades on the Nasdaq under the ticker symbol RPTX. The company focuses on targeted cancer therapies directed at specific genetic vulnerabilities in tumors.

What phase is RP-6306 in?

RP-6306 is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA for any indication. The Phase 2 trial evaluating RP-6306 in patients with advanced cancer has been completed.

What clinical trials is RP-6306 in?

RP-6306 has been evaluated in one clinical trial, NCT05605509, titled "RP-6306 in Patients With Advanced Cancer." This Phase 2 trial enrolled 28 patients with advanced cancer in Canada, was active-controlled, and did not use randomization or double-blinding. The trial has been completed.