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Study of RP-6306 With FOLFIRI in Advanced Solid Tumors

Phase 1 Study of the PKMYT1 Inhibitor RP-6306 in Combination With FOLFIRI for the Treatment of Advanced Solid Tumors

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05147350
Acronym
MINOTAUR
Enrollment
38
Registered
2021-12-07
Start date
2022-08-09
Completion date
2025-02-12
Last updated
2025-12-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Advanced Solid Tumor

Brief summary

The primary purpose of this study is to assess the safety and tolerability of RP-6306 with FOLFIRI in patients with eligible advanced solid tumors, determine the maximum tolerated dose (MTD), identify a recommended phase 2 dose (RP2D) and preferred schedule, and assess preliminary anti-tumor activity.

Detailed description

To assess the safety and tolerability of RP-6306 in combination with FOLFIRI in patients with eligible, advanced solid tumors. Incidence and severity of treatment-emergent adverse events (TEAEs), laboratory assessments, vital signs, electrocardiograms (ECGs), and use of concomitant medications. The Sponsor of the study has changed from 'Repare Therapeutics' to 'Debiopharm International SA' in the United States.

Interventions

RP-6306 (Oral) in combination with FOLFIRI (IV)

Sponsors

Repare Therapeutics
CollaboratorINDUSTRY
Debiopharm International SA
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Dose Escalation and expansion

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Male or female and ≥18 years-of-age at the time of signature of the informed consent * Confirmed advanced solid tumors resistant or refractory to standard treatment * Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1. * All patients must have locally advanced or metastatic CRC, GI, or esophageal cancer(s) and radiographic evidence of progressing disease. * Measurable disease as per RECIST v1.1 * Submission of available tumor tissue or willingness to have a biopsy performed if safe and feasible * Acceptable hematologic and organ function at screening * Negative pregnancy test for women of childbearing potential at Screening and prior to first study drug.

Exclusion criteria

* Inability to swallow and retain oral medications. * Chemotherapy or small molecule antineoplastic agent given within 21 days or \<5 half- lives, whichever is shorter, prior to first dose of study treatment. * History or current condition, therapy, or laboratory abnormality that might confound the study results, or interfere with the patient's participation for the full duration of the study treatment. * Patients who are pregnant or breastfeeding * Life-threatening illness, medical condition, active uncontrolled infection, or organ system dysfunction or other reasons which, in the investigator's opinion, could compromise the participating patient's safety. * Major surgery within 4 weeks prior to first study treatment dose. * Uncontrolled, symptomatic brain metastases. * Uncontrolled high blood pressure * Active, uncontrolled bacterial, fungal, or viral infection, including hepatitis B virus (HBV), hepatitis C virus (HCV), known human immunodeficiency virus (HIV), or acquired immunodeficiency syndrome (AIDS) related illness. * Moderate or severe hepatic impairment * Cardiac diseases currently or within the last 6 months as defined by New York Heart Association (NYHA) ≥Class 2 * Psychological, familial, sociological, or geographical conditions that do not permit compliance with the protocol and/or follow-up procedures outlined in the protocol.

Design outcomes

Primary

MeasureTime frameDescription
Safety and Tolerability of RP 6306 in Combination With FOLFIRIStart of treatment to 30 days post last dose. up to 1.5 yearsIncidence of grade 3 and above Treatment Related Emergent Adverse Events (TRAEs)
Recommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRIDuring 28 days (2 cycles) from the initiation of the study treatmentEvaluation of dose-limiting toxicities (DLTs) at or below a frequency of 25%.

Countries

Canada, Spain, United Kingdom, United States

Participant flow

Participants by arm

ArmCount
40 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI
40 mg QD oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
2
120 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI
120 mg QD oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
3
180 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI
180 mg QD oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
9
240 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI
240 mg QD oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
4
60 mg BID RP-6306 (Lunresertib) Daily + FOLFIRI
60 mg BID oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
7
80 mg BID RP-6306 (Lunresertib) Daily + FOLFIRI
80 mg BID oral (PO) lunresertib daily in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
3
80 mg BID RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRI
80 mg BID oral (PO) lunresertib 3 days on and 4 days off in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
4
120 mg QD RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRI
120 mg BID oral (PO) lunresertib 3 days on and 4 days off in combination with 180 mg/m2 intravenous (IV) irinotecan given over 30 to 90 minutes, 400 mg/m2 IV leucovorin given over 30 to 90 minutes with irinotecan, and 400 mg/m2 IV fluorouracil bolus after leucovorin, then 2400 mg/m2 IV continuous IV of fluorouracil over 46 hours (Days 1 and 2) of each 14-day cycle
6
Total38

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004FG005FG006FG007
Overall StudyDeath23322113
Overall StudyOther Reasons00200211
Overall StudySponsor Decision to Terminate Study00104001
Overall StudyWithdrawal by Subject00311010

Baseline characteristics

Characteristic120 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI180 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI240 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI60 mg BID RP-6306 (Lunresertib) Daily + FOLFIRI80 mg BID RP-6306 (Lunresertib) Daily + FOLFIRI80 mg BID RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRI40 mg QD RP-6306 (Lunresertib) Daily + FOLFIRI120 mg QD RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRITotal
Age, Customized
Age
55 years58 years66 years68 years42 years44 years51 years61 years55.5 years
Gene Type
CCNE1
0 participants4 participants0 participants2 participants0 participants2 participants0 participants4 participants12 participants
Gene Type
FBXW7
3 participants5 participants4 participants5 participants3 participants2 participants2 participants2 participants26 participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants1 Participants0 Participants0 Participants1 Participants1 Participants3 Participants
Race (NIH/OMB)
Black or African American
1 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants1 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants3 Participants1 Participants1 Participants0 Participants1 Participants1 Participants1 Participants8 Participants
Race (NIH/OMB)
White
2 Participants5 Participants3 Participants5 Participants3 Participants3 Participants0 Participants4 Participants25 Participants
Region of Enrollment
Canada
0 Participants0 Participants1 Participants1 Participants0 Participants0 Participants0 Participants0 Participants2 Participants
Region of Enrollment
Spain
0 Participants2 Participants0 Participants0 Participants3 Participants1 Participants0 Participants0 Participants6 Participants
Region of Enrollment
United Kingdom
0 Participants3 Participants2 Participants0 Participants0 Participants1 Participants0 Participants0 Participants6 Participants
Region of Enrollment
United States
3 Participants4 Participants1 Participants6 Participants0 Participants2 Participants2 Participants6 Participants24 Participants
Sex: Female, Male
Female
0 Participants3 Participants1 Participants3 Participants3 Participants3 Participants1 Participants3 Participants17 Participants
Sex: Female, Male
Male
3 Participants6 Participants3 Participants4 Participants0 Participants1 Participants1 Participants3 Participants21 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
EG006
affected / at risk
EG007
affected / at risk
deaths
Total, all-cause mortality
2 / 23 / 33 / 92 / 42 / 71 / 31 / 43 / 6
other
Total, other adverse events
2 / 23 / 39 / 94 / 47 / 73 / 34 / 46 / 6
serious
Total, serious adverse events
1 / 22 / 35 / 93 / 43 / 71 / 32 / 42 / 6

Outcome results

Primary

Recommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI

Evaluation of dose-limiting toxicities (DLTs) at or below a frequency of 25%.

Time frame: During 28 days (2 cycles) from the initiation of the study treatment

Population: DLT evaluable

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
40 mg QD RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI0 Participants
120 mg QD RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI0 Participants
180 mg QD RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI0 Participants
240 mg QD RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI2 Participants
60 mg BID RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI0 Participants
80 mg BID RP-6306 (Lunresertib) Daily + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI0 Participants
80 mg BID RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI2 Participants
120 mg QD RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRIRecommended Phase 2 Dose (RP2D) and Schedule of RP-6306 in Combination With FOLFIRI1 Participants
Primary

Safety and Tolerability of RP 6306 in Combination With FOLFIRI

Incidence of grade 3 and above Treatment Related Emergent Adverse Events (TRAEs)

Time frame: Start of treatment to 30 days post last dose. up to 1.5 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
40 mg QD RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI1 Participants
120 mg QD RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI1 Participants
180 mg QD RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI6 Participants
240 mg QD RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI3 Participants
60 mg BID RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI0 Participants
80 mg BID RP-6306 (Lunresertib) Daily + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI1 Participants
80 mg BID RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI2 Participants
120 mg QD RP-6306 (Lunresertib) 3 Days on and 4 Days Off + FOLFIRISafety and Tolerability of RP 6306 in Combination With FOLFIRI4 Participants

Source: ClinicalTrials.gov · Data processed: Feb 9, 2026