Recent Updates
Recently added Catalysts

Tuvusertib Tuvusertib microtracer

Phase 1

Solid Tumor | Small molecule | Oncology |Merck KGaA|Trials Updated: Apr 23, 2026

Tuvusertib Tuvusertib microtracer target and mechanism

ModalitySmall molecule

Also known as Tuvusertib [14C]Tuvusertib microtracer

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

CONTROLLED
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Tuvusertib Tuvusertib microtracer clinical trials

Tuvusertib Tuvusertib microtracer · 1 trial · 1 indication

Phase 1 1
NCT06308263Tuvusertib (M1774) Human Mass Balance and Absolute Bioavailability Study (DDRIVER Solid Tumors 303)Solid Tumor
COMPLETED12 Analytics
PHASE1COMPLETED
Tuvusertib (M1774) Human Mass Balance and Absolute Bioavailability Study (DDRIVER Solid Tumors 303)
Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Period 1: Percent Urinary Recovery (feurine) Of Total Radioactivity (TRA) Over the Entire Period Of Collection
Pre-dose up to 312-336 hours post dose
Period 1: Percent Fecal Recovery (fefeces) Of TRA Over the Entire Period Of Collection
Pre-dose up to 312-336 hours post-dose
Period 1: Percent Total Recovery in Urine and Feces (fetotal) Of TRA Over the Entire Period of Collection
Pre-dose up to 312-336 hours post-dose
Period 1 and 1a: Maximum Observed Plasma Concentration (Cmax) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Time to Reach Maximum Plasma Concentration (Tmax) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Area Under the Plasma Concentration-Time Curve from Time Zero to the Time of the Last Quantifiable Concentration (AUC0-tlast) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Area Under the Plasma Concentration-Time Curve (AUC) from Time Zero Extrapolated to Infinity (AUC0-inf) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Apparent Terminal Half-Life (t1/2) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Apparent Total Body Clearance (CL/F) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1 and 1a: Apparent Volume of Distribution (Vz/F) Of Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1: Maximum Observed Concentration (Cmax) of TRA in Plasma and Whole Blood
Pre-dose up to 336 hours post-dose
Period 1: Time to Reach Maximum Concentration (tmax) of TRA in Plasma and Whole blood
Pre-dose up to 336 hours post-dose
Period 1: Area Under Concentration-Time Curve from Time Zero to the Time of the Last Quantifiable Concentration (AUC0-tlast) of TRA in Plasma and Whole Blood
Pre-dose up to 336 hours post-dose
Period 1: Area Under the Concentration-Time Curve from Time Zero Extrapolated to Infinity (AUC0-inf) of TRA in Plasma and Whole Blood
Pre-dose up to 336 hours post-dose
Period 1: Apparent Terminal Half-Life (t1/2) of TRA in Plasma and Whole Blood
Pre-dose up to 336 hours post-dose
Period 1a: Ratio of Dose Normalized AUC0-infinity of Tuvusertib and 14C Tuvusertib in Plasma
Pre-dose up to 336 hours post-dose
Period 1a: Initial Concentration (C0) at Time Zero After Bolus Intervention Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Maximum Observed Concentration (Cmax) at Intravenous Administration of 14 [C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Total Body Clearance (CL) Following at Intravenous Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Volume of Distribution (Vz) during the terminal phase following intravenous administration of 14[C] Tuvusertib
Pre-dose upto 336 hours post-dose
Period 1a: Volume of Distribution at Steady State (Vss) Following at Intravenous Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Area Under the Plasma Concentration-Time Curve from Time Zero to the Time of the Last Quantifiable Concentration (AUC0-tlast) at Intravenous Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Area Under the Plasma Concentration-Time Curve (AUC) from Time Zero Extrapolated to Infinity (AUC0-inf) at Intravenous Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose
Period 1a: Apparent Terminal Half-Life (t1/2) at Intravenous Administration of 14[C] Tuvusertib
Pre-dose up to 336 hours post-dose

Secondary Endpoints

Period 1,1a,2: Number of Participants with Treatment-Emergent Adverse Events (TEAEs), Treatment-Related AEs, Abnormal Laboratory Parameters, abnormal Vital Signs and abnormal 12-Lead Electrocardiogram (ECG) Findings
Baseline up to safety follow up (assessed up to approximately 21 months)
Unlock Study Endpoints

Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Period 1: Mass Balance: Tuvusertib + [14C]Tuvusertib microtracerEXPERIMENTAL -
Period 1a: Absolute Bioavailability: Tuvusertib + [14C]Tuvusertib microdose bolus injectionEXPERIMENTAL -
Period 2: TuvusertibEXPERIMENTAL -

Interventions

NameTypeDescription
Tuvusertib [14C]Tuvusertib microtracerDRUGParticipants will receive single oral dose of Tuvusertib containing a \[14C\] Tuvusertib microtracer solution on Day 1 of period 1 under fasted conditions.
TuvusertibDRUGParticipants will also receive a single oral dose of Tuvusertib on Day 1 of Period 1 or Period 1a, and daily single oral dose of Tuvusertib for 2 weeks in 21 days cycle of Period 2.
Tuvusertib + [14C]Tuvusertib microdose bolus injectionDRUGIn Period 1a, participants will receive on Day 1 of Period 1 a single oral dose of tuvusertib and an intravenous (IV) (14C) tuvusertib microdose as bolus injection.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Are 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 Statu...

Countries:Hungary
Unlock Eligibility Criteria

Competitive Landscape -Other Solid Tumors 10 trials (matched to "Solid Tumor")

Frequently asked questions about Tuvusertib Tuvusertib microtracer

What is Tuvusertib?

Tuvusertib is an investigational small molecule developed by Merck KGaA for the treatment of solid tumors. It is being studied in a Phase 1 clinical trial and has not been approved by the FDA. The drug is also known as Tuvusertib [14C]Tuvusertib microtracer, reflecting a radiolabeled microtracer formulation used in clinical pharmacology studies.

What is Tuvusertib used for in solid tumors?

Tuvusertib is being developed for the treatment of solid tumors. It is an investigational therapy currently in Phase 1 clinical development. The only completed trial to date enrolled 12 patients with solid tumors in Hungary, evaluating human mass balance and absolute bioavailability.

Who is developing Tuvusertib?

Tuvusertib is being developed by Merck KGaA, which trades under the ticker MKGAF. The company is responsible for the clinical development of the drug, including the Phase 1 trial NCT06308263.

What phase is Tuvusertib in?

Tuvusertib is in Phase 1 clinical development. One Phase 1 trial has been completed, and no active trials are currently listed. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trials is Tuvusertib in?

Tuvusertib has been studied in one completed Phase 1 trial, NCT06308263, titled "Tuvusertib (M1774) Human Mass Balance and Absolute Bioavailability Study (DDRIVER Solid Tumors 303)." The trial enrolled 12 patients with solid tumors in Hungary and is now completed.

Is Tuvusertib the same as Tuvusertib [14C]Tuvusertib microtracer?

Yes, Tuvusertib [14C]Tuvusertib microtracer is an alternative name for Tuvusertib. The bracketed notation indicates a carbon-14 radiolabeled microtracer version used in the human mass balance and absolute bioavailability study. Both names refer to the same investigational drug developed by Merck KGaA.