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Berzosertib Human Mass Balance Study (DDRiver Solid Tumors 208)

Phase I Study to Evaluate the Mass Balance, PK, Metabolism and Excretion of Berzosertib (Intravenous) Containing Microtracer [14C]Berzosertib in Participants With Advanced Solid Tumors (DDRiver Solid Tumors 208)

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05246111
Enrollment
6
Registered
2022-02-18
Start date
2022-02-15
Completion date
2023-06-28
Last updated
2024-11-22

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

Conditions

Advanced Solid Tumor

Keywords

Topotecan, Ataxia telangiectasia mutated and Rad3-related (ATR) protein, ATR inhibitor, M6620, Berzosertib, Mass balance

Brief summary

The study was conducted in two periods, Period 1 (mass balance) and Period 2 (extension). The purpose of Period 1 of this study was to provide a quantitative characterization of the mass balance, rates and routes of elimination, and metabolic pathways after a single intravenous administration of \[14C\]berzosertib. The purpose of Period 2 was to assess safety and efficacy of berzosertib in combination with topotecan.

Interventions

DRUG[14C]Berzosertib

Participants received single intravenous infusion of \[14C\]Berzosertib at a dose of 210 milligrams per square meter (mg/m\^2) on Day 1 in Period 1 and stay in clinical research unit (CRU) is required until the discharge criteria are met with a maximum confinement period of 15 days.

Participants received single intravenous infusion of Berzosertib at a dose of 210 mg/m\^2 on Day 2 and Day 5 in period 2 until disease progression or other criteria for study intervention discontinuation were met.

DRUGTopotecan

Participants received topotecan at a dose of 1.25 mg/m\^2 intravenously on Days 1 through 5 of each 21-day cycle in period 2 until disease progression or other criteria for study intervention discontinuation were met.

Sponsors

Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

. * Histologically proven advanced solid tumors that are considered appropriate for treatment in Period 2 of this study, for which no effective standard therapy exists, or standard therapy has failed or cannot be tolerated * Eastern Cooperative Oncology Group Performance Status (ECOG PS) =\< 1 * Evaluable disease according to Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) at Screening * Participant has adequate renal, hematological and hepatic function * Other protocol defined inclusion criteria could apply

Exclusion criteria

* Participants with uncontrolled intercurrent illness including, but not limited to, severe active infection including, acute respiratory syndrome coronavirus-2 infection/coronavirus disease 2019 (Covid 19), immune deficiencies, uncontrolled diabetes, uncontrolled arterial hypertension and symptomatic congestive heart failure * Concurrent participation in another interventional clinical study is not permitted. * Known hypersensitivity to the study interventions, a similar structural compound, or to one or more excipients used * Prior or concurrent treatment with a nonpermitted drug/intervention from the first dose of study intervention administration, as defined per protocol. * Other protocol defined

Design outcomes

Primary

MeasureTime frameDescription
Period 1: Renal Clearance (CLr) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseRenal clearance was calculated as total amount of unchanged drug excreted in the urine between times t1 and t2 (Aeurine) divided by area under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.
Period 1: Terminal Elimination Half-Life (T1/2) of Total Radioactivity in BloodPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseElimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.
Period 1: Cumulative Amount of Berzosertib Dose Excreted in Urine (Aeurine)Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseAeurine is defined as the amount of Berzosertib excreted in urine over the time interval from t1 (= start) and t2 (= end).
Period 1: Percentage of Berzosertib Dose Excreted in Urine (Feurine)Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseFeurine is defined as the amount of Berzosertib unchanged excreted in urine as percentage of the administered dose over the time interval t1 (= start) and t2 (= end).
Period 1: Percent Urinary Recovery (Feurine) of Total RadioactivityPredose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseFeurine, fractions of total radioactivity excreted in urine as percentage of the administered dose between time t1 (= start) and t2 (= end).
Period 1: Percent Fecal Recovery (Fefeces) of Total RadioactivityPredose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseFefeces, fractions of total radioactivity excreted in feces as percentage of the administered dose between time t1 (= start) and t2 (= end).
Period 1: Percent Total Recovery in Urine and Feces (Fetotal) of Total RadioactivityPredose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseFetotal, fractions of total radioactivity excreted in urine and feces as percentage of the administered dose between time t1 (= start) and t2 (= end).
Period 1: Maximum Observed Plasma Concentration (Cmax) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseCmax was obtained directly from the plasma concentration versus time curve.
Period 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseArea under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.
Period 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseAUC0-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.
Period 1: Terminal Elimination Half-Life (T1/2) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseElimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.
Period 1: Total Body Clearance (CL) of Berzosertib From PlasmaPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseCL is a quantitative measure of the rate at which a drug substance is removed from the body, calculated as dose divided by AUC0-infinity.
Period 1: Apparent Volume of Distribution During the Terminal Phase (Vz) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseVz is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Vz was calculated by dividing the dose with area under the concentration time curve from time zero to infinity multiplied with terminal elimination rate constant Lambda(z). Vz = Dose/AUC0-inf multiply Lambda z.
Period 1: Apparent Volume of Distribution at Steady State (Vss) of BerzosertibPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseVss is the theoretical volume that the total amount of administered drug would have to occupy (if it were uniformly distributed), to provide the same concentration as it is in blood plasma at steady state.
Period 1: Maximum Observed Plasma Concentration (Cmax) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseCmax was obtained directly from the plasma concentration versus time curve. Cmax of total radioactivity was calculated in nanogram equivalents per milliliter (ng eq)/mL.
Period 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseArea under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule. AUC0-t was calculated in hour\*nanogram equivalents per milliliter (h\*\[ng eq/mL\]).
Period 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseAUC0-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.
Period 1: Terminal Elimination Half-Life (T1/2) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseElimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.
Period 1: Maximum Observed Blood Concentration (Cmax) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseCmax was obtained directly from the blood concentration versus time curve.
Period 1: Area Under the Blood Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseArea under the blood concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.
Period 1: Area Under the Blood Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total RadioactivityPredose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-doseAUC0-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.

Secondary

MeasureTime frameDescription
Period 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in 12-Lead Electrocardiogram (ECG) MeasurementsPeriod 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)12-lead ECG recordings included rhythm, heart rate (as measured by RR interval), PR interval, QRS duration, and QT interval. 12-lead ECG recordings were obtained after the participants have rested for at least 10 minutes in semi-supine position. Clinical significance was determined by the investigator. The number of participants with clinically significant changes from baseline in 12-lead ECG findings were reported.
Period 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsPeriod 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)An AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product, regardless of causal relationship with this treatment. Therefore, an AE can be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal product, regardless if it is considered related to the medicinal product. Serious AE: AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial/prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAEs are defined as AEs that were reported or worsened on or after start of study drug dosing through the Safety Follow-up Visit. TEAEs included both serious TEAEs and non-serious TEAEs. Treatment related AEs: reasonably related to the study drug/study treatment.
Period 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in Vital SignsPeriod 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)Vital signs included body temperature, heart rate, systolic and diastolic blood pressure and respiration rate. Number of participants with clinically significant findings in vital signs were reported. Clinical significance was decided by Investigator.

Countries

Hungary

Participant flow

Pre-assignment details

First Participant Signed Informed Consent: 15-Feb-2022; Last Participant Last Visit: 28-Jun-2023

Participants by arm

ArmCount
All Participants
Participants received single intravenous infusion of \[14C\]Berzosertib at a dose of 210 milligrams per square meter (mg/m\^2) on Day 1 in Period 1 and stay in clinical research unit (CRU) is required until the discharge criteria are met with a maximum confinement period of 15 days. In Period 2, participants received single intravenous infusion of Berzosertib at a dose of 210 mg/m\^2 on Day 2 and Day 5 in combination with topotecan at a dose of 1.25 mg/m\^2 intravenously on Days 1 through 5 of each 21-day cycle until disease progression or other criteria for study intervention discontinuation were met.
6
Total6

Withdrawals & dropouts

PeriodReasonFG000FG001
Period 01NOT ELIGIBLE IC510

Baseline characteristics

CharacteristicAll Participants
Age, Continuous52 Years
STANDARD_DEVIATION 16.5
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
6 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
6 Participants
Sex: Female, Male
Female
3 Participants
Sex: Female, Male
Male
3 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 61 / 51 / 6
other
Total, other adverse events
6 / 65 / 56 / 6
serious
Total, serious adverse events
0 / 63 / 53 / 6

Outcome results

Primary

Period 1: Apparent Volume of Distribution at Steady State (Vss) of Berzosertib

Vss is the theoretical volume that the total amount of administered drug would have to occupy (if it were uniformly distributed), to provide the same concentration as it is in blood plasma at steady state.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Apparent Volume of Distribution at Steady State (Vss) of Berzosertib930 litersGeometric Coefficient of Variation 24.7
Primary

Period 1: Apparent Volume of Distribution During the Terminal Phase (Vz) of Berzosertib

Vz is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Vz was calculated by dividing the dose with area under the concentration time curve from time zero to infinity multiplied with terminal elimination rate constant Lambda(z). Vz = Dose/AUC0-inf multiply Lambda z.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Apparent Volume of Distribution During the Terminal Phase (Vz) of Berzosertib1340 litersGeometric Coefficient of Variation 31.1
Primary

Period 1: Area Under the Blood Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total Radioactivity

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: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Blood Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total Radioactivity33900 h*(ng eq/mL)Geometric Coefficient of Variation 23.1
Primary

Period 1: Area Under the Blood Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total Radioactivity

Area under the blood concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Blood Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total Radioactivity33100 h*(ng eq/mL)Geometric Coefficient of Variation 23.8
Primary

Period 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Berzosertib

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: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Berzosertib8650 h*ng/mLGeometric Coefficient of Variation 23
Primary

Period 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total Radioactivity

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: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Plasma Concentration-time Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Total Radioactivity39400 h*ng eq/mLGeometric Coefficient of Variation 19.2
Primary

Period 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Berzosertib

Area under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Berzosertib8620 hour*nanogram per milliliter (h*ng/mL)Geometric Coefficient of Variation 23
Primary

Period 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total Radioactivity

Area under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule. AUC0-t was calculated in hour\*nanogram equivalents per milliliter (h\*\[ng eq/mL\]).

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Area Under the Plasma Concentration Time Curve From Time Zero to the Time of the Last Quantifiable Concentration (AUC0-t) of Total Radioactivity38300 h*ng eq/mLGeometric Coefficient of Variation 19
Primary

Period 1: Cumulative Amount of Berzosertib Dose Excreted in Urine (Aeurine)

Aeurine is defined as the amount of Berzosertib excreted in urine over the time interval from t1 (= start) and t2 (= end).

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Cumulative Amount of Berzosertib Dose Excreted in Urine (Aeurine)41.1 milligram equivalent (mg eq)Standard Deviation 14.8
Primary

Period 1: Maximum Observed Blood Concentration (Cmax) of Total Radioactivity

Cmax was obtained directly from the blood concentration versus time curve.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Maximum Observed Blood Concentration (Cmax) of Total Radioactivity2920 ng eq/mLGeometric Coefficient of Variation 9.7
Primary

Period 1: Maximum Observed Plasma Concentration (Cmax) of Berzosertib

Cmax was obtained directly from the plasma concentration versus time curve.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Maximum Observed Plasma Concentration (Cmax) of Berzosertib1870 nanogram per milliliter (ng/mL)Geometric Coefficient of Variation 12.7
Primary

Period 1: Maximum Observed Plasma Concentration (Cmax) of Total Radioactivity

Cmax was obtained directly from the plasma concentration versus time curve. Cmax of total radioactivity was calculated in nanogram equivalents per milliliter (ng eq)/mL.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Maximum Observed Plasma Concentration (Cmax) of Total Radioactivity2410 (ng eq)/mLGeometric Coefficient of Variation 19.2
Primary

Period 1: Percentage of Berzosertib Dose Excreted in Urine (Feurine)

Feurine is defined as the amount of Berzosertib unchanged excreted in urine as percentage of the administered dose over the time interval t1 (= start) and t2 (= end).

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Percentage of Berzosertib Dose Excreted in Urine (Feurine)9.84 percentage of administered dose (%)Standard Deviation 2.74
Primary

Period 1: Percent Fecal Recovery (Fefeces) of Total Radioactivity

Fefeces, fractions of total radioactivity excreted in feces as percentage of the administered dose between time t1 (= start) and t2 (= end).

Time frame: Predose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Percent Fecal Recovery (Fefeces) of Total Radioactivity73.7 percentage of administered dose (%)Standard Deviation 6.56
Primary

Period 1: Percent Total Recovery in Urine and Feces (Fetotal) of Total Radioactivity

Fetotal, fractions of total radioactivity excreted in urine and feces as percentage of the administered dose between time t1 (= start) and t2 (= end).

Time frame: Predose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Percent Total Recovery in Urine and Feces (Fetotal) of Total Radioactivity89.5 percentage of administered dose (%)Standard Deviation 7.04
Primary

Period 1: Percent Urinary Recovery (Feurine) of Total Radioactivity

Feurine, fractions of total radioactivity excreted in urine as percentage of the administered dose between time t1 (= start) and t2 (= end).

Time frame: Predose, 0-4, 4-12, 12-24, 24-48, 48-72, 72-96, 96-120, 120-144 and 144-168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: The Pharmacokinetic (PK) Analysis Set was a subset of the safety analysis set (SAF) included all participants who received at least one dose of Investigational Manufacturing product (IMP), in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Percent Urinary Recovery (Feurine) of Total Radioactivity15.8 percentage of administered dose (%)Standard Deviation 3.2
Primary

Period 1: Renal Clearance (CLr) of Berzosertib

Renal clearance was calculated as total amount of unchanged drug excreted in the urine between times t1 and t2 (Aeurine) divided by area under the plasma concentration versus 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 calculated according to the mixed log-linear trapezoidal rule.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
[14C]BerzosertibPeriod 1: Renal Clearance (CLr) of Berzosertib7.84 liter per hourStandard Deviation 2.86
Primary

Period 1: Terminal Elimination Half-Life (T1/2) of Berzosertib

Elimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Terminal Elimination Half-Life (T1/2) of Berzosertib19.6 hoursGeometric Coefficient of Variation 19.9
Primary

Period 1: Terminal Elimination Half-Life (T1/2) of Total Radioactivity

Elimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Terminal Elimination Half-Life (T1/2) of Total Radioactivity64.3 hoursGeometric Coefficient of Variation 30.1
Primary

Period 1: Terminal Elimination Half-Life (T1/2) of Total Radioactivity in Blood

Elimination Half Life (T1/2) was defined as the time required for the concentration or amount of drug in the body to be reduced by one-half. T1/2 was calculated by natural log 2 divided by Lambda z. Lambda z was determined from the terminal slope of the log-transformed plasma concentration curve using linear regression method.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Terminal Elimination Half-Life (T1/2) of Total Radioactivity in Blood30.6 hoursGeometric Coefficient of Variation 50.6
Primary

Period 1: Total Body Clearance (CL) of Berzosertib From Plasma

CL is a quantitative measure of the rate at which a drug substance is removed from the body, calculated as dose divided by AUC0-infinity.

Time frame: Predose, 0.5, 1, 2, 3, 4, 8, 12, 24, 48, 72, 96, 120, 144 and 168 hours after dosing on Day 1, continued in 24-hour intervals, until discharge criteria are met, assessed up to Day 14 post-dose

Population: PK Analysis Set was a subset of the SAF included all participants who received at least one dose of IMP, in Period 1 and provide at least one measurable post-dose concentration. Here, Overall Number of Participants Analyzed signifies those participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
[14C]BerzosertibPeriod 1: Total Body Clearance (CL) of Berzosertib From Plasma47.7 liter per hourGeometric Coefficient of Variation 32.7
Secondary

Period 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in 12-Lead Electrocardiogram (ECG) Measurements

12-lead ECG recordings included rhythm, heart rate (as measured by RR interval), PR interval, QRS duration, and QT interval. 12-lead ECG recordings were obtained after the participants have rested for at least 10 minutes in semi-supine position. Clinical significance was determined by the investigator. The number of participants with clinically significant changes from baseline in 12-lead ECG findings were reported.

Time frame: Period 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)

Population: SAF included all participants who had received any dose of any study intervention.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
[14C]BerzosertibPeriod 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in 12-Lead Electrocardiogram (ECG) Measurements0 Participants
Berzosertib + TopotecanPeriod 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in 12-Lead Electrocardiogram (ECG) Measurements0 Participants
Secondary

Period 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in Vital Signs

Vital signs included body temperature, heart rate, systolic and diastolic blood pressure and respiration rate. Number of participants with clinically significant findings in vital signs were reported. Clinical significance was decided by Investigator.

Time frame: Period 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)

Population: SAF included all participants who had received any dose of any study intervention.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
[14C]BerzosertibPeriod 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in Vital Signs0 Participants
Berzosertib + TopotecanPeriod 1 and Period 2: Number of Participants With Clinically Significant Changes From Baseline in Vital Signs0 Participants
Secondary

Period 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEs

An AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product, regardless of causal relationship with this treatment. Therefore, an AE can be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal product, regardless if it is considered related to the medicinal product. Serious AE: AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial/prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAEs are defined as AEs that were reported or worsened on or after start of study drug dosing through the Safety Follow-up Visit. TEAEs included both serious TEAEs and non-serious TEAEs. Treatment related AEs: reasonably related to the study drug/study treatment.

Time frame: Period 1: Baseline up to Day 14; Period 2: From Day 1 of period 2 until disease progression or other criteria for study intervention discontinuation are met (up to a maximum of approximately 16 months)

Population: SAF included all participants who had received any dose of any study intervention.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
[14C]BerzosertibPeriod 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsTEAEs6 Participants
[14C]BerzosertibPeriod 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsTreatment Related TEAEs4 Participants
Berzosertib + TopotecanPeriod 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsTEAEs5 Participants
Berzosertib + TopotecanPeriod 1 and Period 2: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment Related TEAEsTreatment Related TEAEs5 Participants

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