Study to Evaluate the Safety and Tolerability of a Once Daily Dose of 50 mg E2609 in Healthy Japanese Subjects

Study Overview
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Brief Summary
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Study E2609-J081-014 is a single-center, randomized, double-blind, placebo-controlled study conducted to evaluate the safety and tolerability of multiple oral doses of E2609 50 milligrams (mg), administered once daily for 14 days, in healthy Japanese participants aged 50 to 85 years.

Official Title
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A Randomized, Double-blind, Placebo-controlled, Multiple Dose Study to Evaluate the Safety and Tolerability of a Once Daily Dose of 50 mg E2609 in Healthy Japanese Subjects

Conditions
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Healthy Participants

Intervention / Treatment
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* Drug: E2609
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy males and females Aged 50 to 85 years, inclusive at time of consent Body mass index (BMI) of 17.6 to 32 kilograms per meters squared (kg/m^2) at Screening Exclusion Criteria: Personal or family history of seizure disorder, symptomatic seizures (not including a history of simple febrile seizures in childhood) or any past or present medical condition which, in the opinion of the investigator has the potential to reduce seizure threshold (eg, history of head trauma or concussion, previous alcohol abuse, substance abuse) A history of cerebrovascular accident or non-vasovagal-related loss of consciousness Any clinically significant findings on neurological examination A family history of Long QT Syndrome or a presence of other risk factors for Torsades de Pointes (TDP), such as hypokalemia, hypomagnesemia, or hypocalcemia History of cardiac arrhythmias, ischemic heart disease, or cerebrovascular disease A history of gastrointestinal surgery that may affect the pharmacokinetic profile of E2609 (eg, hepatectomy, nephrotomy, digestive organ resection) A known history of clinically significant drug or food allergies or presently experiencing significant seasonal allergy

Ages Eligible for Study
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Minimum Age: 50 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: E2609 50 mg<br>Participants will receive E2609 50 milligrams (mg) orally once a day for 14 days. | Drug: E2609<br>* tablet<br>|
| Placebo Comparator: Placebo<br>Participants will receive matching placebo orally once a day for 14 days. | Drug: Placebo<br>* tablet<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants with any serious adverse event and number of participants with any non-serious adverse event | An adverse event is defined as any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A serious adverse event is defined as any adverse event occurring at any dose that results in any of the following outcomes: results in death; is life threatening; results in inpatient hospitalization or prolongation of existing hospitalization; results in a persistent or significant incapacity or substantial disruption of the ability to conduct normal life function; results in a congenital anomaly/birth defect; or can be defined as any other important medical event. | up to Day 35 (Termination/Visit 5) | 
| Number of participants with an abnormal, clinically significant laboratory test value | Laboratory test values will be assigned a low/normal/high (LNH) classification according to whether the value was below (L), within (N), or above (H) the laboratory parameter's reference range. Clinical significance will be determined by the Investigator. | Screening; Baseline; Days 4, 8, 11, 14, 20 (Out-Patient Follow-up), and 35 (Termination/Visit 5); up to Day 62 (unscheduled Follow-up visits) | 
| Number of participants with an abnormal, clinically significant vital sign value | Vital sign measurements (ie, systolic and diastolic blood pressure [BP] [millimeters of mercury (mmHg)], heart rate [beats per minute], respiratory rate [breaths per minute], body temperature [centigrade]) will be obtained in the supine position by a validated method. Clinical significance will be determined by the Investigator. | Screening; Baseline; up to Day 62 | 
| Number of participants with an abnormal, clinically significant electrocardiogram (ECG) finding | Twelve-lead standard ECGs will be recorded in triplicate. ECGs will be recorded after the participant has been in the supine position for at least 10 minutes before and during the reading. In addition, all ECGs will be obtained before blood draws. Clinical significance will be determined by the Investigator. | Screening; Baseline; up to Day 62 | 
| Clinical assessment of suicidality per the suicidality rating scale | The suicidality rating scale will rate a participant's degree of suicidal ideation on a scale, ranging from wish to be dead to active suicidal ideation with specific plan and intent. The decision to classify an isolated suicidality rating scale response as an adverse event will be exercised through medical and scientific judgment. | Baseline (Day -1), 24 hours after dosing (Day 2), Day 15, Day 20, Day 35 (Termination/Visit 5), up to Day 62 (unscheduled Follow-up visits) | 
| Mean quality of sleep score per the Waketime Questionnaire, if necessary | Participants reporting adverse events (AEs) relating to abnormal dreams, nightmares, or sleep terrors will be questioned using the Waketime Questionnaire which is comprised of 5 individual questions. A participant is asked to rate the quality of their sleep as: 1, Very sound or restful; 2, Sound or restful; 3, Average quality; 4, Restless; or 5, Very restless. | up to Day 62 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean maximum observed concentration (Cmax) of E2609 and metabolites on Day 1 and Day 14 | Cmax is defined as the maximum observed concentration that a drug achieves in a specified compartment or test area of the body after the drug has been administered. Using non-compartmental analysis, plasma concentrations of E2609 and metabolites will be analyzed to determine Cmax. Cmax will be summarized as the mean and standard deviation for all participants. | Days 1 and 14: predose; 1, 2, 3, 4, 6, and 10 hours postdose | 
| Mean minimum observed concentration (Cmin) of E2609 and metabolites on Day 1 and Day 14 | Cmin is defined as the minimum observed concentration that a drug achieves in a specified compartment or test area of the body after the drug has been administered. Using non-compartmental analysis, plasma concentrations of E2609 and metabolites will be analyzed to determine Cmin. Cmin will be summarized as the mean and standard deviation for all participants. | Days 1 and 14: predose; 1, 2, 3, 4, 6, and 10 hours postdose | 
| Median time from dosing to reach Cmax (tmax) of E2609 and metabolites on Day 1 and Day 14 | Tmax is defined as the time from dosing to reach the maximum observed concentration a drug achieves in a specified compartment or test area of the body after the drug has been administered. Using non-compartmental analysis, plasma concentrations of E2609 and metabolites will be analyzed to determine Tmax. Tmax will be summarized as the median for all participants. | Days 1 and 14: predose; 1, 2, 3, 4, 6, and 10 hours postdose | 
| Mean area under the concentration-time curve (AUC) from time 0 to 24 hours for E2609 and metabolites on Day 1 and Day 14 | AUC represents the total drug exposure over a defined period of time. Plasma concentrations of E2609 and its metabolites will be analyzed using a non-compartmental analysis approach to determine individual participant estimates of AUC(0-24h). AUC(0-24h) will be summarized as the mean and standard deviation for all participants and will be expressed in nanograms x hour per milliliter (ng*hr/mL). | Days 1 and 14: 1, 2, 3, 4, 6, 10, and 24 hours postdose | 
| Mean terminal elimination half-life (t1/2) following the last day of dosing (Day 14) of E2609 and metabolites | Terminal half-life is the time it takes for a substance to lose half of its pharmacologic, physiologic, or radiologic activity. Plasma concentrations of E2609 and its metabolites will be analyzed using a non-compartmental analysis approach to determine t1/2. t1/2 will be summarized as the mean and standard deviation for all participants and will be expressed in hours. | Day 14: 1, 2, 3, 4, 6, 10, 24, 48, 72, 96, and 144 hours postdose | 
| Mean average concentration calculated as AUCss/tau (Css,av), where tau is the dosing interval, of E2609 and metabolites on Day 1 and Day 14 | Css,av is the average steady-state concentration of a drug. Steady state will be achieved when the rate of E2609 administration and the rate of E2609 elimination are equal. Plasma concentrations of E2609 and its metabolites will be analyzed using a non-compartmental analysis approach to determine the Css,av. | Days 1 and 14: 1, 2, 3, 4, 6, 10, and 24 hours postdose | 
| Mean accumulation ratio for AUC, Cmax, and Cmin (Rac) for E2609 and metabolites on Day 1 and Day 14 | Rac is equal to the ratio of the AUC during a dosage interval at steady state to the AUC of a dosage interval after the first dose. Plasma concentrations of E2609 and its metabolites will be analyzed using a non-compartmental analysis approach to determine Rac. Rac will be summarized as the mean and standard deviation for all participants | Days 1 and 14: 1, 2, 3, 4, 6, 10, and 24 hours postdose | 
| Apparent clearance at steady state (CLss/F) of E2609 on Day 14 | CLss/F is the rate and extent of absorption and clearance of E2609 from the plasma. Plasma concentrations of E2609 and metabolites will be analyzed using a non-compartmental analysis approach to determine CLss/F. | Day 14: 1, 2, 3, 4, 6, 10, 24, 48, 72, 96, and 144 hours postdose | 
| Number of participants with polymorphisms of N-acetyltransferase 2 (NAT2) | NAT2 genotyping will be conducted, and the predicted phenotype (eg, slow, intermediate, or rapid acetylators) will be used in the statistical analysis to evaluate the relative impact of NAT2 polymorphisms on plasma concentrations of E2609 and/or its metabolites. | Day 1 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Healthy Participants, E2609, Pharmacokinetics, Japan