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CompletedNCT01015430Updated Nov 2, 2016

A Study With RO4917523 in Patients With Fragile X Syndrome

A Phase 2 interventional study of Placebo (for RO4917523 ascending doses) and Placebo (for RO4917523 fixed dose) in Fragile X Syndrome, sponsored by Hoffmann-La Roche. Completed at 5 sites in United States. Open to participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2016-11-02.

Sponsored by Hoffmann-La Roche · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Study summary

This randomized, double-blind multiple ascending dose study will evaluate the safety and tolerability, pharmacokinetics and efficacy of RO4917523 in patients with Fragile X Syndrome. The patients will be randomized to receive either active drug or placebo. The anticipated time on study treatment is 6 weeks. The target sample size is \<100 patients.

02

Conditions studied

  • Fragile X Syndrome
03

In context

Fragile X Syndrome

110 studies on the registry are indexed under Fragile X Syndrome; 23 are open to participants now.

This study's enrollment of 40 is below the median of 58 across 88 interventional studies indexed under Fragile X Syndrome.

Browse Fragile X Syndrome studies →

Lead sponsor

Hoffmann-La Roche is the lead sponsor of 2,061 studies on the registry; 85 are open to participants now.

Of its 319 completed or terminated interventional studies of FDA-regulated products, 239 (75%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Adult patients, 18 to 50 years of age
  • Fragile X Syndrome
  • IQ less than 75
  • Reliable caregiver

Exclusion criteria

Exclusion Criteria:

  • Current psychosis or presumption of psychosis
  • History of suicidal behavior or considered a high suicidal risk
  • Severe self-injurious behavior
  • Any unstable medical condition other than Fragile X Syndrome (e.g. hypertension, diabetes)
  • Current seizure disorder
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
40 participants (actual)

Study arms

  • Placebo comparator
    Placebo (for RO4917523 ascending doses)

    Drug: Placebo (for RO4917523 ascending doses) · Drug: Placebo (for RO4917523 fixed dose)

  • Placebo comparator
    Placebo (for RO4917523 fixed dose)

    Drug: Placebo (for RO4917523 ascending doses) · Drug: Placebo (for RO4917523 fixed dose)

  • Experimental
    RO4917523 ascending doses

    Drug: RO4917523

  • Experimental
    RO4917523 fixed dose

    Drug: RO4917523

Interventions

  • DrugPlacebo (for RO4917523 ascending doses)

    Placebo daily po

  • DrugPlacebo (for RO4917523 fixed dose)

    Placebo daily po

  • DrugRO4917523

    RO4917523 ascending doses daily po

  • DrugRO4917523

    RO4917523 fixed dose daily po

06

What researchers measure

Primary outcomes

  1. Safety, Tolerability and Pharmacokinetics: AEs, laboratory parameters

    Time frame: AEs throughout study; laboratory assessments: days 1, 8, 15, 29, 43

Secondary outcomes

  1. Efficacy: Behavior and cognition assessments

    Time frame: Every 2 weeks throughout study

07

Study locations

5 sites
  • Sacramento, California 95817, United States
  • Decatur, Georgia 30033, United States
  • Chicago, Illinois 60612, United States
  • Indianapolis, Indiana 46202, United States
  • Nashville, Tennessee 37203, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 2, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01015430
Lead sponsor
Hoffmann-La Roche
Responsible party
Sponsor
First posted
Nov 18, 2009
Start date
Nov 2009
Primary completion
Jan 2011
Completion
Jan 2011
Last update
Nov 2, 2016

Study contacts

Clinical Trials
study director · Hoffmann-La Roche
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2016. You cannot join it, but the record below documents what was studied.

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