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Human Mass Balance Study of [14C] Ontunisertib in Healthy Volunteers

An Open-label, Two-part Trial to Assess the Mass-balance Recovery, Metabolite Profile, Metabolite Identification and Absolute Bioavailability of [14C] Ontunisertib in Healthy Male Participants

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07672574
Enrollment
8
Registered
2026-06-29
Start date
2026-09-09
Completion date
2026-09-26
Last updated
2026-09-11

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

Conditions

Fibrostenotic Crohn's Disease

Brief summary

This is an open, two-part study in healthy male volunteers, aged 30-65 years. This trial aims to understand how the human body absorbs, distributes, metabolizes and eliminates ontunisertib after a single oral dose of radiolabelled test medicine (\[14C\]ontunisertib) and determine the routes and rates of elimination of the test medicine.

Detailed description

This is an open, two-part study in healthy male volunteers, aged 30-65 years with the trial duration of approximately 7 weeks. In Part 1 of this study, healthy volunteers will be given a dose of test medicine orally followed by an intravenous injection of a very small dose of radiolabelled test medicine that contains a tiny amount of radioactivity (called carbon-14) so that the test medicine can be traced in the blood. In Part 2, single doses of test medicine will be administered orally to find out how the body breaks down and gets rid of the test medicine. The test medicine will be 'radiolabelled' - it will contain a small amount of radioactivity (Carbon-14) - so that it can be traced in the body. Participants will take part in both study parts and will remain resident in the clinic for up to 10 days after their final dose of Investigation Medicinal Product (IMP). After the participants have left the clinic, they may have to collect their urine and faeces at home until mass balance criteria has been met. Over a period of at least 8 days in Part 1 and 10 days in Part 2, many blood samples will be taken, and volunteers will collect all their urine and faeces so that the amount of test medicine and its breakdown products can be measured/analysed. A blood sample will be taken from volunteers between admission and first dose for pharmacogenetic testing.

Interventions

Oral capsule

DRUG[14C]ontunisertib

IV infusion

Sponsors

Agomab Spain S.L.U.
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
OTHER
Masking
NONE

Intervention model description

Non-Randomized, open-label, two-parts Phase I study

Eligibility

Sex/Gender
MALE
Age
30 Years to 65 Years
Healthy volunteers
Yes

Inclusion criteria

* Males aged 30 to 65 years inclusive at the time of signing informed consent * Must agree to the use of an adequate method of contraception for up to 93 days post-final dose * Healthy male participants according to the assessment of the investigator, as based on a complete medical history including a physical examination, vital signs, 12-lead ECG, and laboratory safety tests without any clinically significant abnormalities. * Body mass index of 18.0 to 29.9 kg/m2

Exclusion criteria

* Serious adverse reaction or serious hypersensitivity to any drug or formulation excipients * History of clinically significant renal, hepatic, respiratory, particularly GI disease, especially peptic ulceration, clinically significant GI bleeding, ulcerative colitis, Crohn's Disease or Irritable Bowel Syndrome, and neurological or psychiatric disorder * History of GI surgery (with the exception of appendectomy or hernia repair unless it was performed within the previous 12 months) * Clinically significant abnormal clinical chemistry, hematology, coagulation or urinalysis as judged by the investigator at screening. * Radiation exposure, including that from the present trial, excluding background radiation but including diagnostic x-rays and other medical exposures, exceeding 5 mSv in the last 12 months or 10 mSv in the last 5 years. No occupationally exposed worker shall participate in the trial * Participants who have been administered IMP in an ADME trial or any trial involving administration of 14C radioactivity in the last 12 months * Male participants with pregnant or lactating partners

Design outcomes

Primary

MeasureTime frameDescription
Absolute bioavailability of ontunisertib following oral and IV administrationThrough study completion, an average of 8 daysPart 1: To determine the absolute oral bioavailability of ontunisertib
Cumulative amount of total radioactivity excreted in urine and fecesThrough study completion, an average of 10 daysPart 2: To determine the mass balance recovery after a single oral dose of \[14C\]ontunisertib
Chemical structure of each metabolite accounting for ≥10% of circulating total radioactivity and Metabolite profiling accounting for >80% of total radioactivity recovered in urine and/or fecesThrough study completion, an average of 10 daysPart 2: To characterize the metabolite profile in plasma and excreta (urine and/or feces) after a single oral dose of \[14C\]ontunisertib

Secondary

MeasureTime frameDescription
PK parameter (AUClast)Through study completion, an average of 8 daysPart 1: To characterize the IV PK (AUClast) of \[14C\]ontunisertib and total radioactivity in plasma
Cumulative amount of total radioactivity excreted in urine and feces following IV administrationThrough study completion, an average of 8 daysPart 1: To determine the mass balance recovery after a single IV dose of \[14C\]ontunisertib
Whole blood-to-plasma concentration ratios for total radioactivityThrough study completion, an average of 10 daysPart 2: To evaluate the extent of distribution of total radioactivity into blood cells
Number of participants with adverse events (AEs)Through study completion, an average of 18 daysPart 1 and Part 2: To assess the safety and tolerability of ontunisertib
Number of participants with abnormal physical examinationsThrough study completion, an average of 18 daysPart 1 and Part 2: To assess the safety and tolerability of ontunisertib
Number of participants with abnormal vital signsThrough study completion, an average of 18 daysPart 1 and Part 2: To assess the safety and tolerability of ontunisertib
Number of participants with abnormal ECGs parametersThrough study completion, an average of 18 daysPart 1 and Part 2: To assess the safety and tolerability of ontunisertib
Number of participants with abnormal clinical laboratory safety testsThrough study completion, an average of 18 daysPart 1 and Part 2: To assess the safety and tolerability of ontunisertib
Chemical structure analysis of metabolites accounting for ≥10%Through study completion, an average of 8 daysPart 1: To characterize the metabolites profile in plasma following an IV dose of \[14C\]ontunisertib

Countries

United Kingdom

Contacts

CONTACTAgomab Clinical Operations
clinicalstudies@agomab.com0032 3318 91 70
STUDY_DIRECTORSilke Hüttner, MD

Agomab Therapeutics

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 12, 2026