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Phase Ib/II Study of Carboplatin + M6620 + Avelumab in PARPi-resistant Ovarian Cancer

A Phase Ib Safety Run-in and Randomized Phase II, Open-label Study to Evaluate the Efficacy, Safety, Tolerability, and Pharmacokinetics of M6620 in Combination With Avelumab and Carboplatin in Comparison to Standard of Care Therapy in Participants With PARPi-resistant Recurrent Ovarian, Primary Peritoneal, or Fallopian Tube Cancer

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03704467
Enrollment
3
Registered
2018-10-12
Start date
2019-03-04
Completion date
2019-11-06
Last updated
2020-11-13

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

Conditions

Ovarian Cancer

Keywords

Avelumab, Carboplatin, Primary Peritoneal Cancer, Fallopian Tube Cancer, Platinum sensitive ovarian cancer, Deoxy ribonucleic acid (DNA)-damage response inhibition

Brief summary

The study was to evaluate the efficacy and safety of avelumab in combination with M6620 + carboplatin in participants with PARPi-resistant, recurrent, platinum sensitive ovarian, primary peritoneal, or fallopian tube cancer.

Detailed description

The study was intended to be a phase Ib/II trial, but after completing Phase 1b and confirming the safe combination dose, the sponsor decided not to conduct Phase II.

Interventions

DRUGM6620

Participants received 90 milligrams per square meter (mg/m\^2) of M6620, intravenously (IV) on Day 2 of every 3 weeks (Q3W) cycle for a maximum of 6 cycles in combination treatment with carboplatin and avelumab on Day 1. The M6620 dose may be de-escalated to 60 mg/m\^2, or 40 mg/m\^2.

DRUGAvelumab

Participants received IV infusion of avelumab 1600 mg on Day 1 of each Q3W cycle for maximum of 6 cycles in combination treatment with carboplatin and M6620. Thereafter, avelumab 800 mg intravenously on Day 1 of every two weeks as a maintenance mono-therapy until progressive disease (PD), unacceptable toxicity, withdrawal of consent, or death.

DRUGCarboplatin

Participants received carboplatin area under the concentration-time curve 5 on Day 1 of each Q3W cycle for a maximum of 6 cycles in combination treatment with avelumab and M6620.

Sponsors

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

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Female participants with recurrent epithelial ovarian cancer who have disease progression following maintenance treatment with a PARPi as defined below: 1. Participant must have histologically diagnosed epithelial ovarian, primary peritoneal, or fallopian tube cancer, with nonmucinous histology 2. Participants must have completed at least 2 previous courses of platinum containing therapy (for example, carboplatin or cisplatin) and had documented response (complete response \[CR\] or partial response \[PR\]) to the last platinum-based treatment prior to treatment with a PARPi 3. Participant has received the last dose of platinum-containing treatment at least 6 months prior to study enrollment 4. Participant has documented disease progression (radiological) after at least 4 months of maintenance treatment with PARPi following a response to platinum-based chemotherapy. * Confirmed breast cancer gene (BRCA) 1/2 mutation status or agree to its testing on samples collected in the study. * Available formalin-fixed, paraffin-embedded (FFPE) tumor biopsies. * Part A: Optional 2 paired on-treatment biopsies on Day 2 of Cycle 1 (first biopsy) and Day 2 of Cycle 1 or Cycle 2 (second biopsy) respectively, before and after M6620 administration, if assessed as feasible at low risk by the interventional radiologist. * Part B: Histological tissue specimen (tissue block or 8 to 10 unstained slides) must be available. An archival tumor biopsy is acceptable if obtained after the last progression on PARPi treatment and is less than 4 months old. Otherwise, participants must be willing to undergo mandatory biopsy during the Screening Period to obtain sufficient tissue for histological assessment. Participants need to have an attempted biopsy. However, participants who have measurable disease documented by a radiologist as not feasible or safe to be biopsied are eligible to enter the study * Measurable disease according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1). * Other protocol defined inclusion criteria could apply

Exclusion criteria

* Treatment with a nonpermitted drug/intervention as listed below: 1. Concurrent anticancer treatment (e.g., cytoreductive therapy, radiotherapy, immune therapy, cytokine therapy, monoclonal antibody, or targeted small molecule therapy) or any study intervention within 4 weeks prior to start of study intervention, or not recovered from AEs related to such therapies 2. History of prior dose reductions or dose interruptions while receiving cisplatin or carboplatin due to toxicity from the platinum or intolerance to either agent, unless discussed with and approved by the Sponsor Medical Monitor 3. Prior treatment with a PD-1/PD-L1 targeting agent * Current use of the following medications at the time of enrollment: 1. Immunotherapy or immunosuppressive drugs at the time of enrollment (for example (e.g.,) chemotherapy or systemic corticosteroids) EXCEPT for (a) intranasal, inhaled, topical steroids, or local steroid injection (e.g., intra articular injection), (b) systemic corticosteroids at physiologic doses less than or equals to (≤) 10 milligram per day (mg/day) of prednisone or equivalent, (c) steroids as premedication for hypersensitivity reactions (e.g., computed tomography \[CT\] scan premedication) 2. Growth factors EXCEPT where indicated for treatment of study intervention related myelosuppression and for prophylaxis of repeat myelosuppression after initial occurrence 3. Herbal remedies with immunostimulating properties (e.g., mistletoe extract) or known to potentially interfere with major organ function (e.g., hypericin) 4. Other DNA damage repair inhibitors (except PARPi) (e.g., inhibitors of ATR, ataxia telangiectasia mutated \[ATM\] kinase, DNA-dependent protein kinase \[DNA-PK\], or Wee kinases). * Other protocol defined

Design outcomes

Primary

MeasureTime frameDescription
Part A: Number of Participants With Dose Limiting Toxicities (DLTs)Up to 3 weeksDLT: any death not clearly due to underlying disease/extraneous causes/Grade(Gr) \>=3 nonhematologic/Gr\>=4 hematologic toxicity that was probably/definitely related to any of study interventions, individually/combination that occurred during DLT observation period, except for any of following: Gr3 infusion-related reaction; Transient (\<=6hr) Gr3 flu-like symptoms/fever, controlled with medical management; Transient (\<=72hr) Gr3 fatigue, local reactions, headache, nausea/emesis; Gr3 diarrhea, skin toxicity, liver function test increase; Single laboratory values out of normal range and controlled with medical management; Tumor flare phenomenon: local pain, irritation/rash, localized at sites of known/suspected tumor; Neutropenia (Gr3/4) for \<7 days not associated with any infection; Gr3 thrombocytopenia for \<7 days without clinically significant bleeding and not requiring platelet transfusion; Symptomatic thyroid dysfunction manageable with treatment.

Secondary

MeasureTime frameDescription
Part A: Number of Participants With Confirmed Best Overall Response (BOR)Time from first dose of study treatment up to 230 daysConfirmed BOR according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as best response of any of the complete response (CR), partial response (PR), stable disease (SD) and progressive disease (PD) recorded from the date of randomization until disease progression/ recurrence (taking the smallest measurement recorded since the start of treatment as reference). CR: Disappearance of all evidence of target and non-target lesions. PR: At least 30% reduction from baseline in the sum of the longest diameter (SLD) of all lesions. SD: Neither sufficient increase to qualify for PD nor sufficient shrinkage to qualify for PR. PD was defined as at least a 20% increase in the SLD, taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Number of participants with BOR in each category (CR, PR, SD, PD) were reported.
Part A: Progression-Free Survival (PFS)Time from first dose of study treatment up to 230 daysPFS according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as the time from date of randomization until date of the first observation of progressive disease (PD) or death due to any cause within 12 weeks of the last tumor assessment in the absence of documented PD, whichever occurs first. PD was defined as at least a 20% increase in the sum of longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Participant wise data reported for this outcome measure.
Part A: Duration of Response (DoR)Time from first dose of study treatment up to 230 daysDoR according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as the time from first documentation of objective response (Complete Response \[CR\] or Partial Response \[PR\]) to the date of first documentation of objective progression of disease (PD) or death due to any cause whichever occurs first. CR: Disappearance of all evidence of target and non-target lesions. PR: At least 30% reduction from baseline in the sum of the longest diameter (SLD) of all lesions. PD was defined as at least a 20% increase in the SLD, taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. If a participant has not an event (PD or death), DoR was censored at the date of last adequate tumor assessment.
Part A: Time to Progression (TTP)Time from first dose of study treatment up to 230 daysTTP according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and assessed by an Investigator was defined as the time from first dose of study intervention until progression disease (PD). PD was defined as at least a 20% increase in the sum of longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Participant wise data reported for this outcome measure.
Part A: Time to First Subsequent Therapy (TFST)From date of randomization to the earliest date of first subsequent therapy or death, assessed up to 230 daysThe TFST was defined as the time from the date of randomization to the start date of the first subsequent anti-cancer therapy or death.
Part A: Area Under the Plasma Concentration-Time Curve From Time Zero to Last Quantifiable Concentration (AUC0-t) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)Area under the plasma concentration vs time curve from time zero to the last sampling time t at which the concentration was at or above the lower limit of quantification (LLOQ). AUC0-t was to be calculated according to the mixed log-linear trapezoidal rule.
Part A: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Related TEAEsTime from first dose of study treatment up to 230 daysAn adverse event (AE) was defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of study drug, whether or not considered related to the study drug. A serious AE was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. TEAEs were defined as events that started or worsened after first dose of study intervention until 30 days after last dose. TEAEs included both serious and non-serious AEs. Treatment-related TEAE: reasonably related to the study intervention. The AE could medically (pharmacologically/clinically) be attributed to the study intervention under study in this clinical study protocol.
Part A: Area Under the Plasma Concentration-Time Curve During a Dosing Interval (AUCtau)Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)AUCtau was defined as area under the plasma concentration-time curve from time zero to the end of the dosing interval (tau). AUCtau was calculated using the mixed log linear trapezoidal rule.
Part A: Terminal Rate Constant (Lambda z) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.
Part A: Maximum Observed Plasma Concentration (Cmax) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)Cmax was obtained directly from the concentration versus time curve.
Part A: Minimum Observed Plasma Concentration (Cmin) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)Cmin was minimum observed plasma concentration obtained directly from the concentration versus time curve.
Part A: Time to Reach the Maximum Plasma Concentration (Tmax) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)Tmax was obtained directly from the concentration versus time curve.
Part A: Apparent Terminal Half-life (t1/2) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)t1/2 was the time measured for the concentration to decrease by one half. t1/2 was calculated by natural log 2 divided by Lambda z.
Part A: Area Under the Plasma Concentration-Time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of M6620 and AvelumabPre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)AUC0-inf was calculated by combining AUC0-t and AUCextra. AUCextra represents an extrapolated value obtained by Clast pred/Lambda z, where Clast pred was the calculated plasma concentration at the last sampling time point at which the measured plasma concentration is at or above the Lower Limit of quantification (LLOQ) and Lambda z was the apparent terminal rate constant determined by log-linear regression analysis of the measured plasma concentrations of the terminal log-linear phase.

Countries

Belgium, United Kingdom, United States

Participant flow

Recruitment details

First participant signed informed consent: 04 Mar 2019, Last participant last visit: 06 Nov 2019.

Pre-assignment details

This study was planned to be conducted in 2 parts; Part A was the safety run-in part and Part 2 was the randomized controlled part. However, after completing Part A and confirming the safe combination dose, the sponsor decided not to conduct Part B.

Participants by arm

ArmCount
Part A: Carboplatin + M6620 + Avelumab
Participants received intravenous infusion of Carboplatin area under the concentration-time curve 5 on Day 1 in combination with 90 milligrams per square meter (mg/m\^2) of M6620 on Day 2 and avelumab at an established dose of 1600 mg over 60 minutes on Day 1 for every 3 weeks cycle for a maximum of 6 cycles. Thereafter, avelumab 800 mg intravenously on Day 1 of every two weeks as a maintenance mono-therapy until progressive disease (PD), unacceptable toxicity, withdrawal of consent, or death.
3
Total3

Baseline characteristics

CharacteristicPart A: Carboplatin + M6620 + Avelumab
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
1 Participants
Age, Categorical
Between 18 and 65 years
2 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
3 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
3 Participants
Sex: Female, Male
Female
3 Participants
Sex: Female, Male
Male
0 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 3
other
Total, other adverse events
3 / 3
serious
Total, serious adverse events
1 / 3

Outcome results

Primary

Part A: Number of Participants With Dose Limiting Toxicities (DLTs)

DLT: any death not clearly due to underlying disease/extraneous causes/Grade(Gr) \>=3 nonhematologic/Gr\>=4 hematologic toxicity that was probably/definitely related to any of study interventions, individually/combination that occurred during DLT observation period, except for any of following: Gr3 infusion-related reaction; Transient (\<=6hr) Gr3 flu-like symptoms/fever, controlled with medical management; Transient (\<=72hr) Gr3 fatigue, local reactions, headache, nausea/emesis; Gr3 diarrhea, skin toxicity, liver function test increase; Single laboratory values out of normal range and controlled with medical management; Tumor flare phenomenon: local pain, irritation/rash, localized at sites of known/suspected tumor; Neutropenia (Gr3/4) for \<7 days not associated with any infection; Gr3 thrombocytopenia for \<7 days without clinically significant bleeding and not requiring platelet transfusion; Symptomatic thyroid dysfunction manageable with treatment.

Time frame: Up to 3 weeks

Population: DLT analysis set included all evaluable participants with data used for implementing the dose-escalation schedule. These participants received at least 1 study intervention administration of each avelumab, M6620, and/or chemotherapy in the DLT evaluation period or should have stopped treatment because of DLTs in the DLT evaluation period.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Dose Limiting Toxicities (DLTs)0 Participants
Secondary

Part A: Apparent Terminal Half-life (t1/2) of M6620 and Avelumab

t1/2 was the time measured for the concentration to decrease by one half. t1/2 was calculated by natural log 2 divided by Lambda z.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Area Under the Plasma Concentration-Time Curve During a Dosing Interval (AUCtau)

AUCtau was defined as area under the plasma concentration-time curve from time zero to the end of the dosing interval (tau). AUCtau was calculated using the mixed log linear trapezoidal rule.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Area Under the Plasma Concentration-Time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of M6620 and Avelumab

AUC0-inf was calculated by combining AUC0-t and AUCextra. AUCextra represents an extrapolated value obtained by Clast pred/Lambda z, where Clast pred was the calculated plasma concentration at the last sampling time point at which the measured plasma concentration is at or above the Lower Limit of quantification (LLOQ) and Lambda z was the apparent terminal rate constant determined by log-linear regression analysis of the measured plasma concentrations of the terminal log-linear phase.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Area Under the Plasma Concentration-Time Curve From Time Zero to Last Quantifiable Concentration (AUC0-t) of M6620 and Avelumab

Area under the plasma concentration vs time curve from time zero to the last sampling time t at which the concentration was at or above the lower limit of quantification (LLOQ). AUC0-t was to be calculated according to the mixed log-linear trapezoidal rule.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Duration of Response (DoR)

DoR according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as the time from first documentation of objective response (Complete Response \[CR\] or Partial Response \[PR\]) to the date of first documentation of objective progression of disease (PD) or death due to any cause whichever occurs first. CR: Disappearance of all evidence of target and non-target lesions. PR: At least 30% reduction from baseline in the sum of the longest diameter (SLD) of all lesions. PD was defined as at least a 20% increase in the SLD, taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. If a participant has not an event (PD or death), DoR was censored at the date of last adequate tumor assessment.

Time frame: Time from first dose of study treatment up to 230 days

Population: Data could not be calculated as none of the participants showed objective response.

Secondary

Part A: Maximum Observed Plasma Concentration (Cmax) of M6620 and Avelumab

Cmax was obtained directly from the concentration versus time curve.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Minimum Observed Plasma Concentration (Cmin) of M6620 and Avelumab

Cmin was minimum observed plasma concentration obtained directly from the concentration versus time curve.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Number of Participants With Confirmed Best Overall Response (BOR)

Confirmed BOR according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as best response of any of the complete response (CR), partial response (PR), stable disease (SD) and progressive disease (PD) recorded from the date of randomization until disease progression/ recurrence (taking the smallest measurement recorded since the start of treatment as reference). CR: Disappearance of all evidence of target and non-target lesions. PR: At least 30% reduction from baseline in the sum of the longest diameter (SLD) of all lesions. SD: Neither sufficient increase to qualify for PD nor sufficient shrinkage to qualify for PR. PD was defined as at least a 20% increase in the SLD, taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Number of participants with BOR in each category (CR, PR, SD, PD) were reported.

Time frame: Time from first dose of study treatment up to 230 days

Population: Safety analysis set included all participants who received at least 1 dose of any study intervention.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Confirmed Best Overall Response (BOR)Complete Response0 Participants
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Confirmed Best Overall Response (BOR)Partial Response0 Participants
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Confirmed Best Overall Response (BOR)Stable Disease1 Participants
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Confirmed Best Overall Response (BOR)Progressive Disease2 Participants
Secondary

Part A: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Related TEAEs

An adverse event (AE) was defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of study drug, whether or not considered related to the study drug. A serious AE was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. TEAEs were defined as events that started or worsened after first dose of study intervention until 30 days after last dose. TEAEs included both serious and non-serious AEs. Treatment-related TEAE: reasonably related to the study intervention. The AE could medically (pharmacologically/clinically) be attributed to the study intervention under study in this clinical study protocol.

Time frame: Time from first dose of study treatment up to 230 days

Population: Safety analysis set included all participants who received at least 1 dose of any study intervention.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Related TEAEsTEAEs3 Participants
Part A: Carboplatin + M6620 + AvelumabPart A: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Related TEAEsTreatment-Related TEAEs3 Participants
Secondary

Part A: Progression-Free Survival (PFS)

PFS according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and as assessed by an Investigator was defined as the time from date of randomization until date of the first observation of progressive disease (PD) or death due to any cause within 12 weeks of the last tumor assessment in the absence of documented PD, whichever occurs first. PD was defined as at least a 20% increase in the sum of longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Participant wise data reported for this outcome measure.

Time frame: Time from first dose of study treatment up to 230 days

Population: Safety analysis set was used. No summary analysis was done as study was early discontinued as per Sponsor's decision and participant wise data was reported. Here, Number Analyzed signifies specific participant evaluated in the arm of this outcome measure.

ArmMeasureGroupValue (NUMBER)
Part A: Carboplatin + M6620 + AvelumabPart A: Progression-Free Survival (PFS)Participant 11.9 months
Part A: Carboplatin + M6620 + AvelumabPart A: Progression-Free Survival (PFS)Participant 22.1 months
Part A: Carboplatin + M6620 + AvelumabPart A: Progression-Free Survival (PFS)Participant 36.1 months
Secondary

Part A: Terminal Rate Constant (Lambda z) of M6620 and Avelumab

Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

Secondary

Part A: Time to First Subsequent Therapy (TFST)

The TFST was defined as the time from the date of randomization to the start date of the first subsequent anti-cancer therapy or death.

Time frame: From date of randomization to the earliest date of first subsequent therapy or death, assessed up to 230 days

Population: Data could not be calculated since the date of first subsequent treatment was not recorded in the electronic case report form (eCRF) as per changes in planned analysis.

Secondary

Part A: Time to Progression (TTP)

TTP according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) and assessed by an Investigator was defined as the time from first dose of study intervention until progression disease (PD). PD was defined as at least a 20% increase in the sum of longest diameter (SLD), taking as reference the smallest SLD recorded from baseline or the appearance of 1 or more new lesions and unequivocal progression of non-target lesions. Participant wise data reported for this outcome measure.

Time frame: Time from first dose of study treatment up to 230 days

Population: Safety analysis set was used. No summary analysis was done as study was early discontinued as per Sponsor's decision and participant wise data was reported. Here, Overall Number of Participants Analyzed = participants who were evaluable for this outcome measure and number analyzed = specific participants evaluated in the arm.

ArmMeasureGroupValue (NUMBER)
Part A: Carboplatin + M6620 + AvelumabPart A: Time to Progression (TTP)Participant 22.1 months
Part A: Carboplatin + M6620 + AvelumabPart A: Time to Progression (TTP)Participant 11.9 months
Secondary

Part A: Time to Reach the Maximum Plasma Concentration (Tmax) of M6620 and Avelumab

Tmax was obtained directly from the concentration versus time curve.

Time frame: Pre-dose, 0, 1, 2, 3 and 6 hours post-dose on Day 2 Cycle 1; post-dose 47 hours on Day 4 Cycle 1; pre-dose and at 0 hour on Day 2 Cycle 2 (each Cycle is 21 days)

Population: As per changes in planned analysis, the outcome measure related to pharmacokinetic parameters was not assessed.

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