A Study of Single and Multiple Doses of KW-6356 in Healthy Subjects

Study Overview
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Brief Summary
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Phase I study to assess the safety, tolerability and pharmacokinetics of single and multiple doses of KW-6356 in healthy volunteers

Detailed Description
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The study will have 3 parts: In Part A and Part B, a placebo-controlled double-blind study will be conducted to investigate safety, tolerability and pharmacokinetics of a single dose and 14 days multiple doses of KW-6356 in Japanese healthy men, respectively In Part C, an open-label study will be conducted to investigate safety, tolerability and pharmacokinetics of 7 days multiple doses of KW-6356 in Japanese and Caucasian healthy men

Official Title
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A Phase I Study of KW-6356 in Japanese and Caucasian Healthy Adults

Conditions
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Parkinson's Disease

Intervention / Treatment
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* Drug: KW-6356 Low Dose
* Drug: KW-6356 Middle Dose
* Drug: KW-6356 High Dose
* Drug: KW-6356 X Dose
* Drug: KW-6356 Y Dose
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Individuals who provided freely-given written consent for participating in this study Men aged 20 ≥ and < 45 at the time of informed consent; Japanese individuals without mixed marriage for at least last two generations, for participating Part A and Part B Japanese and Caucasian individuals without mixed marriage for at least last two generations, for participating Part C Individuals with BMI ≥ 18.5 and < 30.0 Individuals with screening results of; resting pulse rate: 40 to 100 bpm, systolic blood pressure: 91 to 140 mmHg, diastolic blood pressure: 40 to 90 mmHg Exclusion Criteria: Individuals with any current diseases requiring treatment Individuals with current cerebrovascular, gastrointestinal, cardiovascular, hematologic, renal, or liver diseases Individuals with current symptomatic allergy Individuals with current or past drug allergy Individuals with current or past psychiatric disorders Individuals with a history of any autoimmune diseases or malignant tumor Individuals with alcohol or drug dependence, or those who showed any positive result(s) in drug abuse tests Individuals with a history of congestive heart failure, hypokalemia, hypocalcemia, or QT prolongation syndrome Individuals with positive result in any of viral infection tests (HBs antigen, HBs antibody, HBc antibody, HCV antibody, HIV antigen and antibody, and HTLV-1 antibody) or syphilis tests (RPR and TP antibody) at screening. Individuals with abnormality in standard 12-lead ECG that the investigator or subinvestigator determined as clinically significant at screening, Day -1, and before administration of the study drug on Day 1. Individuals who participated in clinical trial(s) of any medical products and received administration of those within 4 months prior to the study drug administration in the current study Individuals who used drugs (including non-prescription drugs, external preparation, vitamins, health supplements, and herbal medicines) within 2 weeks prior to the study drug administration Individuals who consumed grapefruit, or any food and beverage containing grapefruit or St John's Wort within 1 week prior to the study drug administration Individuals who smoked or used stop-smoking aid products (including chewing or eating nicotine-containing products, or application of nicotine patches) within 4 weeks prior to the study drug administration Individuals who admitted to the hospital or had surgery within 3 months prior to the study drug administration Individuals who had any of the following blood drawing for donation, clinical trial, or any other reasons prior to the study drug administration; ≥ 400 mL blood collection within 3 months; ≥ 200 mL blood collection within 4 weeks; or blood collection for pheresis (such as plasmapheresis or plateletpheresis) donation, clinical trial, or any other reasons within 2 weeks Individuals who did not agree to use appropriate contraceptive measures from the day of admission to 12 weeks after the last administration of study drug. The appropriate contraceptive measures are defined as refraining from sexual activity or combining two contraceptive methods including condom, oral contraceptives, intrauterine contraceptive devices or pessary. Any other individuals who were determined as not suitable for participating in this study by the investigator or subinvestigator

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 44 Years

Sexes Eligible for Study
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Male

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: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Part A-1<br>There will be 3 cohorts of Japanese healthy men dosed with single doses of KW-6356 (3 planned dose levels) or with placebo. | Drug: KW-6356 Low Dose<br>* KW-6356 will be administered as single doses.<br>|
| Experimental: Part A-2<br>There will be 3 cohorts of Japanese healthy men dosed with single doses of KW-6356 (3 planned dose levels) or with placebo. | Drug: KW-6356 Middle Dose<br>* KW-6356 will be administered as single doses.<br>|
| Experimental: Part A-3<br>There will be 3 cohorts of Japanese healthy men dosed with single doses of KW-6356 (3 planned dose levels) or with placebo. | Drug: KW-6356 High Dose<br>* KW-6356 will be administered as single doses.<br>|
| Experimental: Part B<br>There will be one cohort of Japanese healthy men dosed with multiple doses of KW-6356 or placebo and one potential additional cohort (KW-6356 dose as determined in Part A or placebo) | Drug: KW-6356 X Dose<br>* KW-6356 will be administered as multiple doses.<br>|
| Experimental: Part C-1<br>There will be 2 cohort of Japanese and Caucasian healthy men dosed with multiple doses of KW-6356 (KW-6356 dose as determined in the previous studies) | Drug: KW-6356 Y Dose<br>* KW-6356 will be administered for Japanese healthy men as multiple doses.<br>|
| Experimental: Part C-2<br>There will be 2 cohort of Japanese and Caucasian healthy men dosed with multiple doses of KW-6356 (KW-6356 dose as determined in the previous studies) | Drug: KW-6356 Y Dose<br>* KW-6356 will be administered for Japanese healthy men as multiple doses.<br>|
| Placebo Comparator: Placebo<br> | Drug: Placebo<br>* All study cohorts (except Part C) are placebo controlled.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Part A Number and percentage of subjects with treatment-emergent adverse events |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose | 
| Part B Number and percentage of subjects with treatment-emergent adverse events |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose | 
| Part C Profiles of pharmacokinetics of plasma KW-6356 concentrations |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Part A Profiles of pharmacokinetics of plasma KW-6356 concentrations |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose | 
| Part B Profiles of pharmacokinetics of plasma KW-6356 concentrations |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose | 
| Part C Number and percentage of subjects with treatment-emergent adverse events |  | Starting about 24 hours before dosing and continued until about 7-14 days after last dose |