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CompletedNCT01253629Updated Dec 23, 2020

Safety and Efficacy of AFQ056 in Adult Patients With Fragile X Syndrome

A Phase 2 interventional study of AFQ056 and Placebo in Fragile X Syndrome, sponsored by Novartis Pharmaceuticals. Completed at 31 sites in 10 countries. Open to participants aged 18 Years to 45 Years. Per ClinicalTrials.gov, last updated 2020-12-23.

Sponsored by Novartis Pharmaceuticals (part of Novartis) · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
175
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
All
01

Study summary

This Phase IIb study is designed to assess whether 3 doses of AFQ056 are safe and effective in treating the behavioral symptoms of Fragile X Syndrome.

02

Conditions studied

  • Fragile X Syndrome

Keywords

  • Fragile X Syndrome
  • Martin-Bell Syndrome
  • Genetic Diseases
  • X-Linked
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 175 is above the median of 58 across 88 interventional studies indexed under Fragile X Syndrome.

Browse Fragile X Syndrome studies →

Lead sponsor

Novartis Pharmaceuticals is the lead sponsor of 2,673 studies on the registry; 228 are open to participants now.

Of its 576 completed or terminated interventional studies of FDA-regulated products, 431 (75%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients with Fragile X Syndrome, who are at least moderately ill based on a Clinical Global Impression Severity score of at least 4 and have qualifying scores on the ABC-C and IQ test at Visit 1

Exclusion criteria

Exclusion Criteria:

  • Advanced, severe or unstable disease that may interfere with the study outcome evaluations
  • Cancer within the past 5 years, other than localized skin cancer
  • Current treatment with more than two psychoactive medications, excluding anti-epileptics
  • History of severe self-injurious behavior

Other protocol-defined inclusion/exclusion criteria may apply

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
175 participants (actual)

Study arms

  • Experimental
    25 mg bid AFQ056

    1 capsule of 25 mg and 1 capsule of placebo per intake

    Drug: AFQ056

  • Experimental
    50 mg bid AFQ056

    2 capsules of 25 mg per intake

    Drug: AFQ056

  • Experimental
    100 mg bid AFQ056

    1 capsule of 100 mg and 1 capsule of placebo per intake

    Drug: AFQ056

  • Placebo comparator
    Placebo

    2 capsules of placebo per intake

    Drug: Placebo

Interventions

  • DrugAFQ056

    AFQ056, was provided as hard gelatin capsules, 25mg and 100 mg oral dosage strengths, identical in appearance were used

  • DrugPlacebo

    Placebo medication identical in appearance to active medication was provided

06

What researchers measure

Primary outcomes

  1. Change from baseline in behavioral symptoms of Fragile X Syndrome using the Aberrant Behavior Checklist - Community (ABC-C) Total score in Stratum I

    The ABC-C is a 58-item questionnaire that should have been completed as much as possible by the same rater. It is comprised of five subscales (irritability, lethargy/social withdrawal, stereotypic behavior, hyperactivity and inappropriate speech) plus the total score which ranks from 0 to 174 in patients who were fully methylated (FM)

    Time frame: 12 weeks

Secondary outcomes

  1. Change from baseline in behavioral symptoms of Fragile X Syndrome (FXS) using the ABC-C Total score in Stratum II

    The ABC-C is a 58-item questionnaire that should have been completed as much as possible by the same rater. It is comprised of five subscales (irritability, lethargy/social withdrawal, stereotypic behavior, hyperactivity and inappropriate speech). Assessing the reduction in the (ABC-C) total score after 12 weeks of treatment in FXS patients with partially methylated (PM) FMR1 gene.

    Time frame: 12 weeks

  2. Global improvement of symptoms in Fragile X using the Clinical Global Impression-Improvement (CGI-I) scale

    The CGI-I score ranges from 1 to 7 (with 1 being "very much improved", 4 being "no change" to 7 being "very much worse")

    Time frame: 12 weeks

  3. Change from baseline in irritability, lethargy/social withdrawal, stereotypic behavior, hyperactivity, and inappropriate speech assessed by the individual subscales of the ABC-C scale

    comprised of five subscales (irritability, lethargy/social withdrawal, stereotypic behavior, hyperactivity and inappropriate speech) plus the total score which ranks from 0 to 174

    Time frame: 12 weeks

  4. The proportion of patients with clinical response in the ABC-C total score

    response is defined as reduction of at least 25% from baseline in the ABC-CFX total score and a score of 1 (very much improved) or 2 (much improved) on the CGI-I scale at Week 12

    Time frame: 12 weeks

  5. improvement of repetitive behavior as measured by changes in the RBS-R

    The Repetitive Behavior Scale - Revised (RBS-R) includes six domains: ritualistic behavior, sameness behavior, stereotypic behavior, self-injurious behavior, compulsive behavior, and restricted interests. A negative change from baseline indicates improvement

    Time frame: Week 12

07

Study locations

31 sites
  • Novartis Investigative Site
    Phoenix, Arizona 85006, United States
  • Novartis Investigative Site
    Sacramento, California 95817, United States
  • Novartis Investigative Site
    Decatur, Georgia 30033, United States
  • Novartis Investigative Site
    Chicago, Illinois 60612, United States
  • Novartis Investigative Site
    Indianapolis, Indiana 46202, United States
  • Novartis Investigative Site
    Boston, Massachusetts 02115, United States
  • Novartis Investigative Site
    Omaha, Nebraska 68198-5575, United States
  • Novartis Investigative Site
    Staten Island, New York 10314, United States
  • Novartis Investigative Site
    Media, Pennsylvania 19063, United States
  • Novartis Investigative Site
    Greenwood, South Carolina 29646, United States
  • Novartis Investigative Site
    Nashville, Tennessee 37212, United States
  • Novartis Investigative Site
    Houston, Texas 77090, United States
  • Novartis Investigative Site
    Ryde, New South Wales 2112, Australia
  • Novartis Investigative Site
    Waratah, New South Wales 2298, Australia
  • Novartis Investigative Site
    Caulfield, Victoria 3161, Australia
  • Novartis Investigative Site
    Brampton, Ontario L6Y 1M5, Canada
  • Novartis Investigative Site
    Sherbrooke, Quebec J1H 5N4, Canada
  • Novartis Investigative Site
    Glostrup, 2600, Denmark
  • Novartis Investigative Site
    Bron Cedex, 69677, France
  • Novartis Investigative Site
    Paris, 75013, France
  • Novartis Investigative Site
    Berlin, 12200, Germany
  • Novartis Investigative Site
    Mainz, 55131, Germany
  • Novartis Investigative Site
    Tübingen, 72076, Germany
  • Novartis Investigative Site
    Würzburg, 97070, Germany
  • Novartis Investigative Site
    Genova, GE 16147, Italy
  • Novartis Investigative Site
    Roma, RM 00168, Italy
  • Novartis Investigative Site
    Málaga, Andalucia 29009, Spain
  • Novartis Investigative Site
    Sant Cugat, Cataluña 08190, Spain
  • Novartis Investigative Site
    Lausanne, Switzerland
  • Novartis Investigative Site
    Zurich, 8091, Switzerland
  • Novartis Investigative Site
    Edinburgh, EH10 5HF, United Kingdom
08

References and documents

Publications

  • Berry-Kravis E, Des Portes V, Hagerman R, Jacquemont S, Charles P, Visootsak J, Brinkman M, Rerat K, Koumaras B, Zhu L, Barth GM, Jaecklin T, Apostol G, von Raison F. Mavoglurant in fragile X syndrome: Results of two randomized, double-blind, placebo-controlled trials. Sci Transl Med. 2016 Jan 13;8(321):321ra5. doi: 10.1126/scitranslmed.aab4109. PubMed 26764156 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 23, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01253629
Responsible party
Sponsor
First posted
Dec 3, 2010
Start date
Nov 2010
Primary completion
Aug 2013
Completion
Aug 2013
Last update
Dec 23, 2020

Study contacts

Novartis Pharmaceuticals
study director · Novartis Pharmaceuticals
View the source record on ClinicalTrials.gov ↗

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

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