MedPath

A Study to Explore the Antiviral Activity, Clinical Outcomes, Safety, Tolerability, and Pharmacokinetics of JNJ-53718678 at Two Dose Levels in Non-Hospitalized Adult Participants Infected With Respiratory Syncytial Virus

Phase 2
Completed
Conditions
Respiratory Syncytial Virus Infections
Interventions
Drug: JNJ-53718678 500 mg
Drug: JNJ-53718678 80 mg
Drug: Placebo
Registration Number
NCT03379675
Lead Sponsor
Janssen Research & Development, LLC
Brief Summary

The purpose of this study is to explore the antiviral effect of JNJ-53718678 at 2 dose levels (80 milligrams \[mg\] and 500 mg) once daily for 7 days in adults with Respiratory Syncytial Virus (RSV) infection, as measured by RSV viral load in nasal secretions by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay.

Detailed Description

This study will be performed to explore the antiviral activity, clinical outcomes, safety, tolerability, and pharmacokinetics of JNJ-53718678 in adult participants infected with RSV. The study will include both participants who are otherwise healthy (ie, without underlying condition) or who have comorbid conditions (eg, asthma, chronic obstructive pulmonary disease (COPD), cardiovascular disease, other chronic diseases), with the exception of immunocompromised participants, presenting for medical care but not requiring hospitalization. The study will include a screening period (Day -1 to Day 1), a treatment Period (Day 1 to Day 8), and a follow-up period (Day 9 to Day 28). Safety evaluations will include adverse events, laboratory tests, electrocardiogram, vital signs, physical examination, and specific toxicities.

Recruitment & Eligibility

Status
COMPLETED
Sex
All
Target Recruitment
72
Inclusion Criteria
  • Participants must have an acute respiratory illness with signs and symptoms consistent with a viral infection (example, fever, cough, nasal congestion, runny nose, sore throat, myalgia, lethargy, shortness of breath, or wheezing) with onset less than or equal to 5 days from the anticipated time of randomization. Onset of symptoms is defined as the time the participant becomes aware of the first sign and/or symptom consistent with a viral infection
  • Participant has been diagnosed with respiratory syncytial virus (RSV) infection using a rapid polymerase chain reaction (PCR) based or rapid-antigen-detection test
  • Before randomization, a woman must be not of childbearing potential defined as: Premenarchal, Postmenopausal or Permanently sterile
  • A male participant must agree to the use of acceptable contraceptive measures
  • With the exception of the RSV-related illness the participant must be medically stable on the basis of physical examination, medical history, vital signs, and electrocardiogram (ECG) performed at screening
Exclusion Criteria
  • Hospitalized participants or participants expected to be hospitalized within 24 hours of screening
  • History of or concurrent illness (beyond a comorbid condition) that in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the participant or that could prevent, limit, or confound the protocol-specified assessments
  • Participants who had major surgery within the 28 days prior to randomization or have planned major surgery through the course of the study
  • Participants who are considered by the investigator to be immunocompromised within the past 12 months
  • Participant has known or suspected chronic or acute hepatitis B or C infection
  • Women who are pregnant or breastfeeding
  • Participants with clinically significant abnormal ECG findings (other than QT-interval corrected for heart rate according to Fridericia [QTcF] interval greater than [>] 500 millisecond [ms]) not consistent with the underlying condition in the study population, as judged by the investigator

Study & Design

Study Type
INTERVENTIONAL
Study Design
PARALLEL
Arm && Interventions
GroupInterventionDescription
Treatment A: JNJ-53718678 500 mgJNJ-53718678 500 mgParticipants will receive 500 mg dose of JNJ-53718678 once daily for 7 days.
Treatment B: JNJ-53718678 80 mg + PlaceboJNJ-53718678 80 mgParticipants will receive 80 mg dose of JNJ-53718678 along with the matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.
Treatment B: JNJ-53718678 80 mg + PlaceboPlaceboParticipants will receive 80 mg dose of JNJ-53718678 along with the matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.
Treatment C: PlaceboPlaceboParticipants will receive matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.
Primary Outcome Measures
NameTimeMethod
Area Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3Baseline through Day 3

Area under the RSV VL-time curve (AUC) was determined as log10 copies\*hour per milliliter (Log10 copies\*hr/mL) by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay of mid turbine nasal swabs.

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5Baseline through Day 5

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8Baseline through Day 8

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14Baseline through Day 14

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Change From Baseline in RSV Viral Load at Day 3Baseline to Day 3

Change from baseline in RSV viral load at Day 3 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Change From Baseline in RSV Viral Load at Day 5Baseline to Day 5

Change from baseline in RSV viral load at Day 5 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Change From Baseline in RSV Viral Load at Day 8Baseline to Day 8

Change from baseline in RSV viral load at Day 8 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Change From Baseline in RSV Viral Load at Day 14Baseline to Day 14

Change from baseline in RSV viral load at Day 14 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Change From Baseline in RSV Viral Load at Day 21Baseline to Day 21

Change from baseline in RSV viral load oat Day 21 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at BaselineBaseline

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at Day 3Day 3

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at Day 5Day 5

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at Day 8Day 8

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at Day 14Day 14

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

RSV Viral Load at Day 21Day 21

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time to Undetectable RSV Viral LoadUp to Day 21

The time to undetectable nasal RSV RNA viral load was defined as the time in days from initiation of study treatment until first post-baseline time point at which RSV RNA was undetectable and after which time there were no more detectable virus assessments.

Percentage of Participants With Undetectable RSV Viral Load at Day 3Day 3

Percentage of participants with undetectable RSV viral load at Day 3 were reported.

Percentage of Participants With Undetectable RSV Viral Load at Day 5Day 5

Percentage of participants with undetectable RSV viral load at Day 5 were reported.

Percentage of Participants With Undetectable RSV Viral Load at Day 8Day 8

Percentage of participants with undetectable RSV viral load at Day 8 were reported.

Percentage of Participants With Undetectable RSV Viral Load at Day 14Day 14

Percentage of participants with undetectable RSV viral load at Day 14 were reported.

Percentage of Participants With Undetectable RSV Viral Load at Day 21Day 21

Percentage of participants with undetectable RSV viral load at Day 21 were reported.

Secondary Outcome Measures
NameTimeMethod
Number of Participants With Adverse Events (AEs) as a Measure of Safety and TolerabilityUp to Day 28

An adverse event is any untoward medical event that occurs in a participant administered an investigational product, and it does not necessarily indicate only events with clear causal relationship with the relevant investigational product.

Number of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUp to Day 28

Number of participants with worst treatment-emergent laboratory abnormalities (serum chemistry, hematology and urinalyses) were reported based on DMID toxicity grading scale. DMID toxicity grade categorized as Grade 1=mild(mild discomfort (\< 48 hours); no medical intervention/therapy required), Grade 2= moderate (Moderate Mild to moderate limitation in activity - some assistance may be needed; no or minimal medical intervention/therapy required), Grade 3= severe (severe Marked limitation in activity, some assistance usually required; medical intervention/therapy required, hospitalizations possible), and Grade 4=life threatening (extreme limitation in activity, significant assistance required; significant medical intervention/therapy required, hospitalization or hospice care probable).

Number of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesUp to Day 28

Number of participants with worst treatment emergent vital sign abnormalities (including Systolic blood pressure \[SBP\] and diastolic blood pressure \[DBP\]) as abnormally low, mild increased, moderate increased and severe increased were reported. SBP: Abnormally low- Less than or equal to (\<=) 50 mmHg, Grade 1 (mild)- 90 mmHg - \< 100 mmHg, Grade 2 (moderate)- greater than or equal to (\>=)100 mmHg to \< 110 mmHg, Grade 3 (severe)- \>=110 mmHg; DBP: Abnormally low- \<=90 mmHg, Grade 1 (mild)- 140 mmHg - \< 160 mmHg, Grade 2 (moderate)- \>=160 mmHg to \< 180 mmHg, Grade 3 (severe)- \>=180 mmHg.

Number of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesUp to Day 28

The number of participants with worst TE ECG abnormalities were reported. The ECG variables that were analyzed included heart rate, PR interval, QRS interval, QT interval, and corrected QT (QTc) interval. Parameters for abnormal ECG findings were QT interval corrected for heart rate (QTc) according to Bazett's formula (QTcB or Borderline Prolonged QTcB) Interval (\[450 milliseconds {ms}, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]), QTc according to Fridericia's formula (QTcF or Borderline Prolonged QTcB) Interval (\[450 ms, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]).

Peripheral Capillary Oxygen Saturation (SpO2) Over TimeBaseline, Days 3, 8, 14, and 21

Peripheral capillary oxygen saturation was measured by the investigator over time.

Change From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Days 3, 8, 14 and 21

Change from baseline in peripheral capillary oxygen saturation levels was calculated by the investigator.

Pulse Rate Over TimeBaseline, Days 3, 8, 14 and 21

Pulse rate was measured by the investigator over time.

Change From Baseline in Pulse RateBaseline to Days 3, 8, 14 and 21

Change from baseline in pulse rate was calculated and reported by the investigator.

Respiratory Rate Over TimeBaseline, Days 3, 8, 14 and 21

Respiratory rate was measured by the investigator over time.

Change From Baseline in Respiratory RateBaseline to Days 3, 8, 14 and 21

Change from baseline in respiratory rate was calculated and reported by the investigator.

Body Temperature Over TimeBaseline, Days 3, 8, 14 and 21

Body temperature was measured over time. Participants were provided a thermometer and asked to record body temperature in the electronic device.

Change From Baseline in Body TemperatureBaseline to Days 3, 5, 8, 14 and 21

Change from baseline in body temperature was calculated and reported. Participants were provided a thermometer and asked to record body temperature in the electronic device.

Area Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post Dose0 to 24 hours post dose on Days 1 and 7

AUC (0-24) is defined as area under the plasma concentration-time curve from time point 0 hours until 24 hours post dose.

Severity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBaseline, Days 3, 5, 8, 14 and 21

The severity of signs and symptoms of RSV infection was assessed using the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO domain score ranges from 0 (symptom free) to 4 (very severe symptoms). Domain scores were calculated as the arithmetic mean of the scores for items within the domain.

Duration of Signs and Symptoms of RSV Assessed by RI-PROBaseline up to Day 21

Duration of signs and symptoms of RSV infection was assessed by the time to resolution of all RSV symptoms from RI-PRO questionnaire. Resolution was defined as a score of 'Not at all/symptom-free' (score=0) or 'A little bit' (score=1) for at least 24 hours. The RI-PRO questionnaire is a 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items) and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).

Time to Resolution of Key RSV Symptoms as Assessed by RI-PRO QuestionnaireUp to Day 21

Time to resolution of key RSV symptoms (congested or stuffy nose, sore or painful throat, trouble breathing, chest tightness, coughing, coughed up mucus or phlegm, weak or tired) as assessed by RI-PRO questionnaire was reported. Resolution of RSV symptoms was defined as a score of 'Not at all/symptom free' (score = 0) or 'A little bit' (score = 1) for at least 24 hours for symptoms of the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).

Time to Return to Usual Activity/Health Based on RI-PRO QuestionnaireUp to Day 21

Time from the first dose of study drug until the time to return to usual activity/health was determined. Return to usual activity/health when the response is 'Yes' on RI-PRO additional question 7 ('Have you returned to your usual activity/health today?') for at least 24 hours.

Predose Plasma Concentration (Ctrough) of JNJ-53718678Predose on Days 1 and 7

Ctrough is the trough plasma concentration of JNJ-53718678 estimated by population PK model.

Maximum Plasma Concentration (Cmax) of JNJ-53718678Days 1 and 7

Cmax is the maximum plasma concentration of JNJ-53718678 estimated by population PK model.

Trial Locations

Locations (124)

Core Healthcare Group

🇺🇸

Cerritos, California, United States

eStudySite

🇺🇸

Chula Vista, California, United States

SC Clinical Research Inc

🇺🇸

Garden Grove, California, United States

Lake Internal Medicine Associates

🇺🇸

Eustis, Florida, United States

Florida Research Center Inc.

🇺🇸

Miami, Florida, United States

Family Medicine

🇺🇸

Nampa, Idaho, United States

William Beaumont Hospital

🇺🇸

Royal Oak, Michigan, United States

AllinaHealth - Abbott Northwestern Hospital (13520)

🇺🇸

Minneapolis, Minnesota, United States

Mercury Street Medical Group, PLLC

🇺🇸

Butte, Montana, United States

Onsite Clinical Solutions

🇺🇸

Charlotte, North Carolina, United States

Scroll for more (114 remaining)
Core Healthcare Group
🇺🇸Cerritos, California, United States

MedPath

Empowering clinical research with data-driven insights and AI-powered tools.

© 2025 MedPath, Inc. All rights reserved.