The purpose of this study is to evaluate the safety, tolerability, and pharmacokinetics (PK, study of the way a drug enters and leaves the blood and tissues over time) of single-ascending oral doses of JNJ-54861911 in healthy Japanese male participants.
This is a single-center, randomized (study medication assigned to participants by chance), double-blind (neither Investigator nor participant knows which treatment the participant receives), placebo controlled (placebo is an inactive substance that is compared with a drug to test whether the drug has a real effect in a clinical trial), study of a single-ascending dose of JNJ-54861911 in participants between 55 to 75 years of age. The duration of study will be approximately 2 to 6 weeks per participant. The study consists of 3 periods: Screening period (28 to 2 days prior to dose administration); Double-blind Treatment period (participants will receive either a single oral dose of JNJ-54861911 or placebo as tablets under fasted conditions); and a Follow-up visit period (7 to 14 days after dose administration). All the eligible participants will be assigned to any of following 3 cohorts: Cohort A (single oral dose of JNJ-54861911, 25 milligram \[mg\] or placebo); Cohort B (single oral dose of JNJ-54861911, 50 mg or placebo); Cohort C (single oral dose of JNJ-54861911, 100 mg or placebo). Each cohort will include 8 participants. Participants in each cohort will be randomly assigned to receive either a single oral dose of JNJ-54861911 (n = 6) or placebo (n = 2). Blood samples will be collected pre-dose and over 96 hours (that is up to Day 5) after dosing for understanding the PK characteristics of JNJ-54861911. Participants' safety will be monitored throughout the study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
24
Single oral dose of JNJ-54861911, 25 mg on Day 1.
Single oral dose of JNJ-54861911, 50 mg on Day 1.
Single oral dose of JNJ-54861911, 100 mg on Day 1.
Unnamed facility
Fukuoka, Japan
Number of Participants With Treatment-Emergent Adverse Events (AEs) or Serious Adverse Events (SAEs)
An AE is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 14 days after last dose administration, that were absent before treatment or that worsened relative to pretreatment state.
Time frame: Screening up to 14 days after last dose administration or early withdrawal
Maximum Plasma Concentration (Cmax)
The Cmax is the maximum observed plasma concentration.
Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours post-administration of drug on Day 1
Time to Reach Maximum Concentration (Tmax)
The Tmax is time to reach the maximum observed plasma concentration.
Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours post-administration of drug on Day 1
Area Under the Plasma Concentration-Time Curve From Time Zero to Last Quantifiable Time (AUC [0-last])
The AUC (0-last) is area under the plasma concentration-time curve from time zero to time of last quantifiable concentration (Clast).
Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours post-administration of drug on Day 1
Apparent Clearance (CL/F)
Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.
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Single oral dose of placebo matched to JNJ-54861911 on Day 1.
Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours post-administration of drug on Day 1
Cerebrospinal Fluid (CSF) Amyloid-Beta Concentration
Amyloid-beta (biomarker, supposed to be a key feature in the pathogenesis of Alzheimer's disease) levels in CSF will be explored.
Time frame: 24 hours pre-administration of drug on Day -1, 24 hours post-administration of drug on Day 2
Plasma Amyloid-Beta Concentration
Amyloid-beta (biomarker, supposed to be a key feature in the pathogenesis of Alzheimer's disease) levels in plasma will be explored.
Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 hours post-administration of drug on Day 1