A Study of RG7625 in Healthy Volunteers

Study Overview
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Brief Summary
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This is a single center, randomized, double-blind, placebo-controlled, single ascending dose study that will evaluate the safety, tolerability, pharmacokinetics and pharmacodynamic effects of single doses of RG7625 in healthy male and female volunteers. The study will employ an interleaved cohort ('leapfrog') design in which dosing is alternated between two cohorts and each individual within a cohort will receive study drug dosing on four occasions - in effect giving a four treatment, four period, four-way crossover for each individual. The minimum duration for each participant is approximately 8 weeks.

Conditions
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Healthy Volunteer

Intervention / Treatment
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* Drug: Placebo
* Drug: RG7625


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy male and female participants, 18 to 60 years of age, inclusive A body mass index between 18 to 30 kg/m2 inclusive Able to participate and willing to give written informed consent and to comply with the study restrictions Exclusion Criteria: Any clinically relevant abnormalities, concomitant diseases or ongoing medical conditions, abnormal laboratory test results or a history of any other clinically significant disorders Any major illness within the one month preceding the screening visit, or any febrile illness within the two weeks preceding the screening visit Any significant allergic reaction to drugs Immunocompromised or with reduced immune function and/or immunization within 30 days before the first study drug administration or planning vaccination during the study Women who are pregnant or lactating or of childbearing potential Clinically significant abnormal ECG or other risk factors for QT prolongation Use of prescribed or over the counter medication Inability or unwillingness to comply with study requirements

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 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

Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort A<br> | Drug: Placebo<br>* Matching oral placebo capsules to RG7625, according to treatment schedule<br>Drug: RG7625<br>* oral administration, capsules, single ascending dose according to treatment schedule<br>|
| Experimental: Cohort B<br> | Drug: Placebo<br>* Matching oral placebo capsules to RG7625, according to treatment schedule<br>Drug: RG7625<br>* oral administration, capsules, single ascending dose according to treatment schedule<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety (composite outcome measure):Incidence and severity of adverse events (AEs), laboratory abnormalities, changes in ECG, vital signs |  | Approximately 22 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics (composite outcome measure): PK profile and parameters derived from plasma concentrations of RG7625 and its metabolites [AUCinf, AUClast, Cmax, tmax, t1/2, CL/F, V/F, Ae, fe and CLR] |  | 22 weeks | 
| Pharmacodynamics (composite outcome measure): measurement of intracellular p10 concentrations and cell surface expression of major histocompatibility complex class (MHC)-II, relationship to RG7625 exposure |  | 22 weeks |