Study to Investigate the Pharmacokinetics, Safety and Tolerability of Odalasvir and AL-335 in Healthy Japanese Participants

Study Overview
=================
Brief Summary
-----------------
The purpose of this study is to investigate the pharmacokinetics (PK), safety and tolerability following single oral administration of ascending doses of odalasvir (ODV) in healthy Japanese participants (Panel 1) and to investigate the PK, safety and tolerability following single oral administration of ascending doses of AL-335 in healthy Japanese participants (Panel 2; Sequential Design).

Official Title
-----------------
A Phase 1, Double-blind, Placebo-controlled, Randomized, Single Ascending Dose Study to Investigate the Pharmacokinetics, Safety and Tolerability of Odalasvir and AL-335 in Healthy Japanese Subjects

Conditions
-----------------
Healthy

Intervention / Treatment
-----------------
* Drug: Odalasvir (ODV)
* Drug: AL-335
* Drug: Placebo


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Participant must be a Japanese participant who has resided outside Japan for no more than 5 years and whose parents and grandparents are Japanese as determined by participant's verbal report Participant must have a body mass index (BMI: weight in kilogram [kg] divided by the square of height in meters) of 18.0 to 30.0 kilogram per meter square (kg/m^2), extremes included and a body weight not less than 50.0 kilogram (kg) Participant must be healthy on the basis of physical examination, medical history, vital signs, and 12-lead electrocardiogram (ECG) performed at Screening. If there are abnormalities, the participant may be included only if the Investigator judges the abnormalities or deviations from normal to be not clinically significant. This determination must be recorded in the participant's source documents and initialed by the Investigator Participant must have a blood pressure (after the participant supine for 5 minutes) between 90 and 140 millimeter of mercury (mmHg) systolic, inclusive, and no higher than 90 mmHg diastolic. If blood pressure is out of range, up to 2 repeated assessments are permitted Female participant must agree to not donate eggs (ova, oocytes) for the purpose of assisted reproduction during the study and for a period of 60 days (Panel 1) or 30 days (Panel 2) after study drug administration or until the last follow-up visit, whichever occurs later Exclusion Criteria: Participant has a history of liver or renal insufficiency (estimated creatinine clearance below 80 milliliters per minute [mL/min]); significant cardiac, vascular, pulmonary, gastrointestinal (such as significant diarrhea, gastric stasis, or constipation that in the Investigator's opinion could influence drug absorption or bioavailability), endocrine, neurologic, hematologic, rheumatologic, psychiatric, neoplastic or metabolic disturbances Participant has any condition for which, in the opinion of the Investigator, participation would not be in the best interest of the participant (for example, compromise the well-being) or that could prevent, limit, or confound the protocol-specified assessments Participant with a past history of heart arrhythmias (for example, extra systolic beats or tachycardia at rest); risk factors associated with Torsade de Pointes such as hypokalemia or family history of short/long QT syndrome or sudden unexplained death (including sudden infant death syndrome) in a first-degree relative [for example, sibling, offspring, or biological parent]) Participant with any history of clinically significant skin disease such as, but not limited to, dermatitis, eczema, drug rash, psoriasis, food allergy, or urticaria Participant has known allergies, hypersensitivity, or intolerance to odalasvir (ODV) or AL-335 or its excipients

Ages Eligible for Study
-----------------
Minimum Age: 20 Years
Maximum Age: 55 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Panel 1: Treatment A<br>Participants will receive odalasvir (ODV) 50 milligram (mg) (n=8) or placebo (n=2) on Day 1. | Drug: Odalasvir (ODV)<br>* ODV 50 mg (1 tablet) in Treatment A, 100 mg (2 tablets of 50 mg) in Treatment B and 300 mg (6 tablets of 50 mg) in Treatment C.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|
| Experimental: Panel 1: Treatment B<br>Participants will receive ODV 100 mg (n=8) or placebo (n=2) on Day 1. | Drug: Odalasvir (ODV)<br>* ODV 50 mg (1 tablet) in Treatment A, 100 mg (2 tablets of 50 mg) in Treatment B and 300 mg (6 tablets of 50 mg) in Treatment C.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|
| Experimental: Panel 1: Treatment C<br>Participants will receive ODV 300 mg (n=8) or placebo (n=2) on Day 1. | Drug: Odalasvir (ODV)<br>* ODV 50 mg (1 tablet) in Treatment A, 100 mg (2 tablets of 50 mg) in Treatment B and 300 mg (6 tablets of 50 mg) in Treatment C.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|
| Experimental: Panel 2: Treatment D<br>Participants will receive AL-335 400 mg (n=8) or placebo (n=2) on Day 1 of Period 1. Each treatment period will be separated by a washout period of 7 days. | Drug: AL-335<br>* AL-335 400 mg (1 tablet) in Treatment D, 800 mg (2 tablets of 400 mg) in Treatment E and 1200 mg (3 tablets of 400 mg) in Treatment F.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|
| Experimental: Panel 2: Treatment E<br>Participants will receive AL-335 800 mg (n=8) or placebo (n=2) on Day 1 of Period 2. Each treatment period will be separated by a washout period of 7 days. | Drug: AL-335<br>* AL-335 400 mg (1 tablet) in Treatment D, 800 mg (2 tablets of 400 mg) in Treatment E and 1200 mg (3 tablets of 400 mg) in Treatment F.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|
| Experimental: Panel 2: Treatment F<br>Participants will receive AL-335 1,200 mg (n=8) or placebo (n=2) on Day 1 of Period 3. Each treatment period will be separated by a washout period of 7 days. | Drug: AL-335<br>* AL-335 400 mg (1 tablet) in Treatment D, 800 mg (2 tablets of 400 mg) in Treatment E and 1200 mg (3 tablets of 400 mg) in Treatment F.<br>Drug: Placebo<br>* Matching placebo will be administered.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum Observed Concentration (Cmax) of Odalasvir (ODV) | The Cmax is the maximum observed analyte concentration. | From Day 1 to Day 14 after intake of ODV | 
| Time to Reach Maximum Observed Concentration (Tmax) of ODV | The Tmax is defined as actual sampling time to reach maximum observed analyte concentration. | From Day 1 to Day 14 after intake of ODV | 
| Area Under the Concentration-Time Curve From Time Zero to Time of the Last Quantifiable Concentration (AUClast) of ODV | The (AUC [0-last]) is the area under the analyte concentration-time curve from time 0 to time of the last quantifiable concentration. | From Day 1 to Day 50-55 after intake of ODV | 
| Elimination Rate Constant (Lambda[z]) of ODV | Lambda(z) is first order elimination rate constant associated with the terminal portion of the curve, determined as the negative slope of the terminal log-linear phase of the drug concentration-time curve. | From Day 1 to Day 50-55 after intake of ODV | 
| Elimination Half-Life (t1/2) of ODV | Elimination half-life (t[1/2]) is associated with the terminal slope (lambda [z]) of the semi-logarithmic drug concentration-time curve, calculated as 0.693/lambda(z). | From Day 1 to Day 50-55 after intake of ODV | 
| Area Under the Concentration-Time Curve From Time Zero to Infinite Time (AUC [0-infinity]) of ODV | The AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time, calculated as the sum of AUC(last) and C(last)/lambda(z); wherein AUC(last) is area under the plasma concentration-time curve from time zero to last quantifiable time, C(last) is the last observed quantifiable concentration, and lambda(z) is elimination rate constant. | From Day 1 to Day 50-55 after intake of ODV | 
| Number of Participants With Adverse Events (AE) as a Measure of Safety and Tolerability for ODV |  | Up to 50-55 days after intake of ODV | 
| Maximum Observed Concentration (Cmax) of AL-335 | The Cmax is the maximum observed analyte concentration. | From Day 1 to Day 4 after intake of AL-335 | 
| Time to Reach Maximum Observed Concentration (Tmax) of AL-335 | The Tmax is defined as actual sampling time to reach maximum observed concentration. | From Day 1 to Day 4 after intake of AL-335 | 
| Area Under the Concentration-Time Curve From Time Zero to Time of the Last Quantifiable Concentration (AUClast) of AL-335 | The (AUC [0-last]) is the area under the concentration-time curve from time 0 to time of the last quantifiable concentration. | From Day 1 to Day 4 after intake of AL-335 | 
| Elimination Rate Constant (Lambda[z]) of AL-335 | Lambda(z) is first order elimination rate constant associated with the terminal portion of the curve, determined as the negative slope of the terminal log-linear phase of the drug concentration-time curve. | From Day 1 to Day 4 after intake of AL-335 | 
| Elimination Half-Life (t1/2) of AL-335 | Elimination half-life (t[1/2]) is associated with the terminal slope (lambda [z]) of the semi-logarithmic drug concentration-time curve, calculated as 0.693/lambda(z). | From Day 1 to Day 4 after intake of AL-335 | 
| Area Under the Concentration-Time Curve From Time Zero to Infinite Time (AUC [0-infinity]) of AL-335 | The AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time, calculated as the sum of AUC(last) and C(last)/lambda(z); wherein AUC(last) is area under the plasma concentration-time curve from time zero to last quantifiable time, C(last) is the last observed quantifiable concentration, and lambda(z) is elimination rate constant. | From Day 1 to Day 4 after intake of AL-335 | 
| Number of Participants With Adverse Events (AE) as a Measure of Safety and Tolerability for AL-335 |  | Up to 30 to 35 days after last intake of AL-335 |