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M9466 in Combination With Topoisomerase 1 Inhibitors-based Regimens in Advanced Solid Tumors and Colorectal Cancer (DDRiver 511)

An Open Label, Multicenter, Phase 1 Study to Evaluate the Safety, Tolerability, and Pharmacokinetic/Pharmacodynamic Profile of the PARP1 Inhibitor M9466 in Combination With Topoisomerase 1 Inhibitor-based Regimens in Advanced Solid Tumors and Colorectal Cancer (DDRiver 511)

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06509906
Enrollment
3
Registered
2024-07-19
Start date
2024-10-08
Completion date
2025-12-02
Last updated
2025-12-18

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

Conditions

Advanced Solid Tumor

Keywords

PARP inhibitor, DNA repair inhibitor, Irinotecan, FOLFIRI

Brief summary

The purpose of this study is to evaluate the safety and preliminary clinical activity of M9466 in combination with topoisomerase 1 inhibitors-based regimens. As such the combination with FOLFIRI (folinic acid, fluorouracil, irinotecan) and Bevacizumab will be evaluated in participants with colorectal cancer, to establish the M9466 maximum tolerated dose if observed and the recommended dose for expansion. Study Duration: After a Screening period of up to 28 days, enrolled participants will remain in the study until they have completed all the study visits or until they withdraw consent, are lost to follow-up, or die. Visit Frequency: The participants will come for a Screening Visit and 1 to 2 visits per treatment cycle. After end of study intervention period, the participants will come for an End of Treatment Visit and a Safety Follow-up Visit.

Interventions

DRUGM9466

M9466 will be administered orally until progressive disease, unacceptable toxicity, death, or end of study.

DRUGIrinotecan

Irinotecan will be administered intravenously once every 2 weeks (q2w) until progressive disease, unacceptable toxicity, death, or end of study.

DRUGFolinic acid

Folinic acid will be administered intravenously q2w as per standard of care.

Fluorouracil will be administered intravenously as per standard of care.

DRUGBevacizumab

Bevacizumab will be administered intravenously, q2w until progressive disease, unacceptable toxicity, death, or end of study.

G-CSF will be administered subcutaneously at every cycle of study intervention as per standard of care.

Sponsors

Merck KGaA, Darmstadt, Germany
CollaboratorINDUSTRY
EMD Serono Research & Development Institute, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* M9466 + Irinotecan Run-in Cohort: Participants with locally advanced or metastatic disease that is refractory to standard therapy or for which no standard therapy is judged appropriate by the Investigator (that is \[i.e.\] participants who have exhausted all standard of care (SoC) options according to International Guidelines), and who may derive clinical benefit from the combination treatment with M9466 and irinotecan * M9466 + FOLFIRI + Bevacizumab Dose Finding Cohorts: Participants with documented histopathological diagnosis of locally advanced or metastatic colorectal cancer (CRC), who were intolerant/refractory to or progressed after standard systemic therapies for the advanced/metastatic stage that included: Oxaliplatin and a fluoropyrimidine (administration in the adjuvant setting fulfills this criterion if progression occurred within 12 months of the last dose). Prior use of irinotecan is permitted; Either an anti- epidermal growth factor receptor (anti-EGFR) or an anti- Vascular endothelial growth factor (anti-VEGF) agent (not applicable if oxaliplatin was administered in the adjuvant setting); An immune checkpoint inhibitor for participants with known MSI-H status; Anti-EGFR agent and BRAF tyrosine kinase inhibitor ± MEK inhibitor, if locally available, for participants with BRAF V600E mutations. Participants may have received maximally 1 previous regimen for the treatment of metastatic disease (with the exception of participants with MSI-H disease or BRAF positive disease who are allowed to have had up to 2 previous lines of treatment) * Eastern Cooperative Oncology Group performance status (ECOG PS) less than or equal to (\<=) 1 * Other protocol defined inclusion criteria could apply

Exclusion criteria

* Persistence of AEs related to any prior treatments that have not recovered to Grade \<= 1 by National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0 (NCI-CTCAE v5.0) unless AEs are clinically nonsignificant and/or stable on supportive therapy in the opinion of the Investigator (for example \[e.g.\] neuropathy or alopecia) * History of additional malignancy within 3 years before the date of enrollment (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, benign prostate neoplasm/hypertrophy, or malignancy that in the opinion of the Investigator, is considered cured with minimal risk of recurrence within 3 years). Participants with history of myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) are excluded, irrespective of timeframe * Participant with known polymorphisms in UGT1A1, DPYD or other enzymes known to predict for increased toxicity from irinotecan or 5 fluorouracil (5-FU) should be excluded; if status is unknown testing is not mandated, unless required by local guidance. Participants that discontinued prior 5-FU treatment due to toxicity are also excluded * Participants with known brain metastases, except if clinically controlled, which is defined as individuals with central nervous system (CNS) tumors that have been treated and are asymptomatic, and who have discontinued steroids (for the treatment of CNS tumors) for \> 28 days prior to first dose of study intervention * Other protocol defined

Design outcomes

Primary

MeasureTime frame
Number of Participants with Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsTime from signing Informed Consent Form (ICF) up to 30 days after end of study intervention (approximately assessed up to 18.7 months)
Number of Participants with Dose Limiting Toxicity (DLT)Day 1 up to Day 28 of the first two Cycles (each cycle is of 14 days)

Secondary

MeasureTime frame
Pharmacokinetic (PK) Plasma Concentration of M9466Pre-dose up to 6 hours post-dose on Cycle 1 Day 1; (each cycle is of 14 days)
Objective Response (OR) According to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) Assessed by InvestigatorTime from first treatment of study intervention up to planned assessment at 18.7 months

Countries

Australia, Japan, South Korea, Spain, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026