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Evaluating The Efficacy And Safety Of Donepezil Hydrochloride (Aricept) In The Treatment Of The Cognitive Dysfunction Exhibited By Children With Down Syndrome, Aged 6 To 10

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00754013
Recruitment Status : Terminated (Sufficient evidence of efficacy not met.)
First Posted : September 17, 2008
Results First Posted : February 13, 2013
Last Update Posted : January 28, 2020
Information provided by (Responsible Party):
Eisai Inc.

Brief Summary:
The purpose of this study is to determine the efficacy and safety of donepezil hydrochloride (Aricept) in the treatment of cognitive dysfunction shown by children with Down syndrome, aged 6 to 10 years.

Condition or disease Intervention/treatment Phase
Down Syndrome Cognitive Dysfunction Drug: Aricept (Donepezil hydrochloride) Drug: Placebo Phase 3

Detailed Description:
This is a multinational study with sites in the US, India, Singapore, South Korea, Mexico and Chile. There will be 210 subjects (male or female) enrolled that are residing in community or facilities with a reliable caregiver that have been clinically diagnosed with Down syndrome. The assessments performed during this study will be used to evaluate skills. The study duration will be 10 weeks of double blind treatment with a total of 6 visits; 4 in office visit and 2 phone visits.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 9 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: A 10-Week, Double-Blind, Placebo-Controlled Study To Evaluate The Efficacy And Safety Of Donepezil Hydrochloride (Aricept) In The Treatment Of The Cognitive Dysfunction Exhibited By Children With Down Syndrome, Aged 6 To 10
Study Start Date : September 2008
Actual Primary Completion Date : October 2008
Actual Study Completion Date : December 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Down Syndrome

Arm Intervention/treatment
Active Comparator: Donepezil Drug: Aricept (Donepezil hydrochloride)

All subjects will start with a dose of 1.25 mg/day (1.25 ml) donepezil ; dose escalations will occur every 2 weeks to a maximum of 5 mg/day (5 ml) donepezil.

All doses will be administered orally.

Other Name: Donepezil hydrochloride

Placebo Comparator: Placebo Drug: Placebo

All subjects will start with a dose of 1.25 mg/day (1.25 ml) placebo; dose escalations will occur every 2 weeks to a maximum of 5 mg/day (5 ml) placebo.

All doses will be administered orally.

Primary Outcome Measures :
  1. Vineland-II Adaptive Behavior Scales (VABS-II) Parent/Caregiver Rating Form (PCRF) Sum of the 9 Sub-domain V-scores (3 Scores for Each of the Communication, Daily Living Skills, and Socialization Domains) Using Last Observation Carried Forward. [ Time Frame: Visit 0 (Screen), Visits 1 (Baseline), 2, and 3 (or Early Termination). ]
    The primary objective of the study was evaluation of the efficacy and safety of donepezil hydrochloride in the treatment of the cognitive dysfunction exhibited by children with Down syndrome (DS), aged 6 to 10, as assessed by analysis of VABS-II/PCRF in the domains of communication, daily living skills, and socialization, and as assessed by standard safety measurements.

Secondary Outcome Measures :
  1. Mean Change From(Baseline) to Visit 3(Week 10 or Early Termination) in VABS-II/PCRF Sum of the 9 Sub-domain V-scores (3 Scores for Each of the Communication, Daily Living Skills, and Socialization Domains) Using Last Observation Carried Forward. [ Time Frame: Visit 1 (Baseline) to Visit 3 (Week 10 or early termination). ]
    The planned secondary objectives of the study included further evaluation of efficacy as assessed by additional analyses of the VABS-II/PCRF, by analyses of the Test of Verbal Expression and Reasoning (TOVER), a subject-performance-based measure of expressive language function, and by the Forward Memory and Attention Sustained sub-tests of the Leiter International Performance Scale - Revised (Leiter-R), a cognitive assessment instrument for children and adolescents that is not language dependent. In addition, observed case analyses of these assessments at Week 4 and Week 10 were planned.

Information from the National Library of Medicine

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Ages Eligible for Study:   6 Years to 10 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age range: Subjects 6 to 10 years of age at the screening visit; weight >= 15 kg.
  • Sex distribution: both males and females.
  • VABS-II/PCRF receptive sub-domain raw score of >= 25 and expressive sub-domain raw score of >= 61.
  • Clinical diagnosis of Down syndrome (DS) - subjects may have free trisomy 21, Robertsonian translocations, or mosaic DS
  • Naive to approved or unapproved cholinesterase inhibitors (Aricept, Exelon, Cognex, Reminyl/Razadyne, metrifonate, physostigmine) is preferred. However, prior use of these medications is allowed, provided that the medication was discontinued at least 3 months prior to screening and that it was not discontinued for lack of tolerability or efficacy or for the sole purpose of enrolling the patient in the study. The exception to this prior use is that subjects who participated in the Phase II study E2020-A001-219 (A2501059) are not eligible.
  • Subjects residing in the community or in facilities that have consistent and reliable caregivers who can provide efficacy information about the subjects.
  • The subjects must be expected to complete all procedures scheduled during the Screening and Baseline visits including all efficacy and safety parameters. Subjects who are verbal and able to be understood most of the time are preferred, but those who use other forms of communication, signs, symbol boards or devices to supplement his/her communication ability may be enrolled provided they meet the VABS-II/PCRF receptive and expressive score criteria mentioned above.
  • Subjects must have a parent, or other reliable caregiver who agrees to accompany the subject to all clinic visits, provide information about the subject as required by the protocol, and ensure compliance with the medication schedule.
  • The parent or caregiver must be a constant and reliable informant with sufficient contact with the subject to have detailed knowledge of the subject's adaptive functioning in order to be able to complete the VABS-II/PCRF accurately. The same individual should complete the form at every visit if possible.
  • Subjects should be in good general health with no medical conditions that are considered both clinically significant and unstable.
  • Clinical laboratory values within normal limits or abnormalities considered not clinically significant by the investigator and sponsor.
  • Subjects with stable Type I (insulin-dependent) or Type II diabetes are eligible provided they are monitored regularly prior to and during the study to ensure adequate glucose control. (Adequacy of control is based on the investigator's judgment, but should be guided primarily by a glycosylated hemoglobin [hemoglobin A1c] <8.0 at screening; other information, including records of home monitoring and the screening fasting glucose may support this judgment.)
  • Subjects with thyroid disease also may be included in the study provided they are euthyroid and stable on treatment for at least 1 month prior to screening.
  • Subjects with a history of seizure disorder are allowed provided that they are on stable treatment for at least 3 months and have not had a seizure within the past 6 months.
  • Subjects should be independent in ambulation or ambulatory aided (i.e., walker or cane, to wheelchair); vision and hearing (eyeglasses and/or hearing aid permissible) sufficient for achieving VABS-II/PCRF minimum receptive raw scores of >= 25 and expressive scores of >= 61 and for cooperating with secondary efficacy evaluations and study examinations.

Exclusion Criteria:

  • Age range: Subjects <6 or >10 years at the screening visit.
  • Subjects with active or clinically significant conditions that will, in the investigator's judgment, affect absorption, distribution or metabolism of the study medication (e.g., inflammatory bowel disease, gastric or duodenal ulcers or severe lactose intolerance); controlled celiac disease is allowed.
  • Subjects with a known hypersensitivity to piperidine derivatives or cholinesterase inhibitors.
  • Subjects currently receiving cholinesterase inhibitors or who have received them in the 3 months prior to screening or with prior use >3 months prior to screening who stopped for lack of efficacy or tolerability or simply to enroll the subject in this study. Also excluded are subjects who participated in the Phase II study E2020-A001-219 (A2501059). In addition, subjects may not have taken any other investigational medications (including memantine) within 3 months prior to screening.
  • Subjects without a reliable parent or caregiver (caregiver responsibilities are described in the Inclusion Criteria above), or with parents or caregivers who are unwilling or unable to complete any of the outcome measures and fulfill the requirements of this study.
  • Subjects with clinically significant obstructive pulmonary disease or asthma, untreated or not controlled by treatment within 3 months prior to screening.
  • Subjects with recent (<= 1 year) or ongoing hematologic/oncologic disorders (mild anemia allowed).
  • Evidence of active, clinically significant, and unstable gastrointestinal, renal, hepatic, endocrine or cardiovascular system disease.
  • Subjects with a current Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) diagnosis of Major Depressive Disorder (MDD) or any current primary psychiatric diagnosis other than DS (as per DSM-IV). Diagnoses that are secondary, such as attention deficit hyperactivity disorder, are allowed.
  • Any condition which would make the patient or the caregiver, in the opinion of the investigator, unsuitable for the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00754013

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United States, Texas
Road Runner Research
San Antonio, Texas, United States, 78258
United States, Virginia
NeuroScience, Inc.
Herndon, Virginia, United States, 20170
Sponsors and Collaborators
Eisai Inc.
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Study Director: Thomas McRae, MD Pfizer
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Responsible Party: Eisai Inc. Identifier: NCT00754013    
Other Study ID Numbers: E2020-A001-336
First Posted: September 17, 2008    Key Record Dates
Results First Posted: February 13, 2013
Last Update Posted: January 28, 2020
Last Verified: February 2017
Keywords provided by Eisai Inc.:
Down syndrome
cognitive dysfunction
children with Down syndrome
Additional relevant MeSH terms:
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Down Syndrome
Cognitive Dysfunction
Pathologic Processes
Cognition Disorders
Neurocognitive Disorders
Mental Disorders
Intellectual Disability
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Abnormalities, Multiple
Congenital Abnormalities
Chromosome Disorders
Genetic Diseases, Inborn
Cholinesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Cholinergic Agents
Neurotransmitter Agents
Physiological Effects of Drugs
Nootropic Agents