Bioavailability of [14C]-SK-1404 ADME & IV Microtracer Study

An Open-Label, 2-Part Sequential Dose Study Designed to Assess the Absolute Bioavailability, Mass Balance Recovery, Metabolite Profile and Metabolite Identification of [14C]-SK-1404 Administered to Healthy Male Subjects

The primary objectives of the study are:

• To determine the absolute bioavailability of SK-1404
• To assess the mass balance recovery after a single oral (PO) dose of carbon-14 (14C)-SK-1404
• To provide plasma, urine and faecal samples for metabolite profiling and structural identification

The secondary objectives of the study are:

• To determine the routes and rates of elimination of [14C]-SK-1404
• To identify the chemical structure of each metabolite with an exposure (AUC) of more than 10% of circulating total radioactivity
• To explore the intravenous (IV) pharmacokinetics (PK) of [14C]-SK-1404
• To further explore the PO PK of SK-1404
• To provide additional safety and tolerability information for SK-1404

Study Overview

• Status: Completed
• Conditions: Nocturia
• Intervention / Treatment: Drug: [14C]-SK-1404

Detailed Description

This is a single-centre, 2-part, open-label, non-randomised, sequential, single dose study in healthy male subjects. It is planned to enrol a single cohort of 6 healthy male subjects who will participate in Parts 1 and Part 2 of the study.

In Part 1, each subject will receive a single PO dose of SK-1404 followed by an IV microtracer dose of [14C]-SK-1404.

In Part 2, each subject will receive a single PO dose of [14C]-SK-1404.

• Study Type: Interventional
• Enrollment (Actual): 6
• Phase: Phase 1

Contacts and Locations

Study Locations

• United Kingdom
  • Nottingham
    • Ruddington, Nottingham, United Kingdom, NG11 6JS
      • Quotient Clinical

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 30 years to 65 years (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

1. Healthy males
2. Age 30 to 65 years of age
3. Body mass index of 18.0 to 35.0 kg/m2 or, if outside the range, considered not clinically significant by the investigator
4. Must be willing and able to communicate and participate in the whole study
5. Must provide written informed consent
6. Must have regular bowel movements (ie average stool production of ≥1 and ≤3 stools per day)
7. Must agree to use an adequate method of contraception

Exclusion Criteria:

1. Males with pregnant partners
2. Participation in a clinical research study within the 3 months prior to IMP dose
3. Subjects who are study site employees, or immediate family members of a study site or sponsor employee
4. Subjects who have previously been enrolled in this study
5. Subjects who have previously been dosed with SK-1404
6. History of any drug or alcohol abuse in the past 2 years
7. Regular alcohol consumption in males >21 units per week (1 unit = ½ pint beer, 25 mL of 40% spirit or a 125 mL glass of wine) in the past year
8. Current smokers and those who have smoked within the last 12 months; this includes cigarettes, e-cigarettes and nicotine replacement products. A breath carbon monoxide reading of greater than 10 ppm at screening or admission
9. Radiation exposure, including that from the present study, 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, as defined in the Ionising Radiation Regulations 1999, shall participate in the study
10. Subjects who have been enrolled in an ADME study in the last 12 months
11. Subjects who do not have suitable veins for multiple venepunctures/cannulation as assessed by the investigator at screening
12. Clinically significant abnormal biochemistry, haematology or urinalysis as judged by the investigator (laboratory parameters are listed in Appendix 1)
13. Aspartate aminotransferase, alanine aminotransferase or alkaline phosphatase >1.5 × upper limit of normal confirmed by repeat testing
14. Serum sodium below the lower limit of normal

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: [14C]-SK-1404	Drug: [14C]-SK-1404; In Part 1, each subject will receive a single PO dose of SK-1404 followed by an IV microtracer dose of [14C]-SK-1404.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Absolute bioavailability (F) calculated with the AUC values of IV administration in Part 1 and PO administration in Part 2		Predose to 96hr
Mass balance recovery of total radioactivity in urine, faeces and all excreta	Amount excreted (Ae), and Ae as a percentage of the administered dose (%Ae), cumulative recovery (Cum Ae) and cumulative recovery expressed as a percentage of the dose (Cum %Ae)	Predose to 168hr
Number and structural identification of known and unknown metabolites of SK-1404 in the plasma, urine and faeces samples		Predose to 168hr

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Ae total radioactivity in plasma by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
%Ae total radioactivity in plasma by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
Cum Ae (total) for urine by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
Cum %Ae (total) for urine by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
Cum Ae (total) for faeces by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
Cum %Ae (total) for faeces by metabolite profiling and structural identification to estimate the routes and rates of elimination of [14C]-SK-1404		Predose to 168hr
Number and structural identification of unknown metabolites of SK-1404 with an AUC of more than 10% of circulating total radioactivity		Predose to 168hr
The peak plasma concentration (Cmax) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The time from dosing at which Cmax was apparent (Tmax) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The elapsed time from dosing at which the analyte was first quantifiable in a concentration vs time profile (Tlag) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The area under the concentration-time curve from dosing to the last measurable concentration (AUC(0-last)) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The area under the concentration-time curve from dosing extrapolated to infinity (AUC(0-inf)) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The percentage of AUC(0-inf) extrapolated beyond the last measured time point (AUC%extrap) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The terminal elimination rate constant calculated from the slope of the apparent elimination phase (lambda-z) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The apparent terminal elimination half-life (T1/2) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The apparent total clearance (CL/F) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The apparent volume of distribution (Vd) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The apparent volume of distribution (Vss) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The mean residence time (MRT) of SK-1404F and its active metabolites M-1, M-7 and M-9) after IV SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 96hr
The peak plasma concentration (Cmax) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The time from dosing at which Cmax was apparent (Tmax) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The elapsed time from dosing at which the analyte was first quantifiable in a concentration vs time profile (Tlag) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The area under the concentration-time curve from dosing to the last measurable concentration (AUC(0-last)) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The area under the concentration-time curve from dosing extrapolated to infinity (AUC(0-inf)) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The percentage of AUC(0-inf) extrapolated beyond the last measured time point (AUC%extrap) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The terminal elimination rate constant calculated from the slope of the apparent elimination phase (lambda-z) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The apparent terminal elimination half-life (T1/2) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The absolute bioavailability (F, PO vs IV from Part 1) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The apparent total clearance (CL/F) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The apparent volume of distribution (Vd/F) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
The mean residence time (MRT) of SK-1404F and its active metabolites M-1, M-7 and M-9) after PO SK-1404	Metabolite:parent ratios will be calculated for SK-1404F, M-1, M-7 and M-9	Predose to 168hr
To collect further information about the safety and tolerability of IMP	By assessing physical examination, safety laboratory tests, vital signs, electrocardiograms (ECGs) and AEs.	Predose to 168hr

Collaborators and Investigators

• Sponsor: Sanwa Kagaku Kenkyusho Co., Ltd.
• Investigators: Principal Investigator: Litza McKenzie, MBChB BScMedSci, Quotient Clinical

Study record dates

Study Major Dates

• Study Start: July 1, 2016
• Primary Completion (Actual): August 1, 2016
• Study Completion (Actual): August 1, 2016

Study Registration Dates

• First Submitted: August 5, 2016
• First Submitted That Met QC Criteria: August 19, 2016
• First Posted (Estimate): August 25, 2016

Study Record Updates

• Last Update Posted (Estimate): October 14, 2016
• Last Update Submitted That Met QC Criteria: October 12, 2016
• Last Verified: October 1, 2016

More Information

Terms related to this study

• Keywords: nocturnal polyuria
• Additional Relevant MeSH Terms: Lower Urinary Tract Symptoms; Urological Manifestations; Nocturia
• Other Study ID Numbers: QCL117764

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO